Zhuhai Gopower Smart Grid Co., LTD

33KV SF6 Gas Load Break Switch(2024年06月04日)

gopower — 2024-06-06T16:33:03+0900

https://www.zhgopower.com/products/33kv-sf6-gas-load-break-switch.html

33KV SF6 Gas Load Break Switch
These load break switch 33kv are intended for outdoor applications. They can be mounted either horizontally or vertically, and are suitable for electrical operation and power distribution by power distribution cabinet. These 33kv load break switch are tested by our quality controllers on various parameters before delivering them to our valued customer ends. We manufacture these switches with the help of cutting edge technology, which allows us to deliver a flawless product that is sure to be flawless as well. The 33 kV live parts are not directly touchable and hence guarantee protection from hazards.

33kv Load Break Switch Application
The 33kv pole mounted switch is made of a proven rugged, corrosion-resistant material (304L stainless steel plate for warships), ensuring a long service life (30 years) and a range of operations, with the characteristics ideal for on-column equipment.

33kv Load Break SwitchTechnical Parameters
Products Type
FWX-36

Basic Ratings

Maximum System Voltage
36kV

Rated Continuous Current
630A

Rated Frequency
50/60Hz

Short Time Withstand Current
16kA/1sec

Making and Breaking Capacity

Mainly Active Load Current
630A

Number of Load-break Operations
400times

Short-circuit Making Current (peak)
40kA

Number of Making Operations
5 times

Cable Charging Current
25A

Line Charging Current
1.5A

Closed Loop Circuit Current
630A

Transformer Magnetizing Current
22A

Power Frequency Withstand Current Test

Wet Condition-10sec Ph- Ph-Eth, Across Interrupters
70kV

DryCondition-1min，Ph- Ph, Phase to Earth
95kV

Dry Condition - 1 min Across Interrupter
110kV

Impulse Withstand Current Test( 1.2 x 50 µs )

Phase to Phase, Phase to Earth
195kV

Across Interrupter
215kV

Other Ratings & Specifications

Internal Arc Test
20kA /0.1 sec

Arc Extinction Medium
SF6 Gas

Insulation Medium
SF6 Gas

Creepage Distance (Porcelain)
1055mm

Creepage Distance (Silicon)
1550mm

Dry arcing distance
≥

IP Level
65

Operation Performance

Closing/Opening Time
＜1sec

Mechanical Operations (Guaranteed)
10000times

Operating Temperature (*Manual Type)
-25～+70℃

Gas Pressure

Nominal Pressure (MPa, at 20°C)
0.07

Bursting Pressure (MPa)
0.4～0.6

Minimum Gas Pressure (MPa)
0.05

Leakage Rate (cc/ sec)
≤0.5%

Voltage sensors

CT ABC 10P10 5VA
400:05:00

Incoming side and outgoing side of the voltage sensor
6 Voltage sensor（built-in）

Phase voltage：（24（36）kV/√3）/（3.25V/√3）

Special attention should be paid to the voltage sensor, which must be directly fed by the 33KV load break interrupter switch.

No additional adjustment circuit can be added to the controller. The voltage signal of the 33kv load break switch into the test line needs to be tested separately.

Zhuhai Gopower Smart Grid Co., Ltd. was founded in 1998. It is one of the earliest high-tech electric power equipment ltd engaged in R&D and production of (12KV-40.5kV) medium-voltage transmission and distribution intelligent control equipment in China. It is one of the initiators and members of the Zhuhai Smart Grid Alliance. After 15 years of painstaking exploration and development.

Now the price of remote t erminal unit is reasonable, if you have needs, please contact us.

24KV Recloser Vacuum Circuit Breaker(2024年06月06日)

gopower — 2024-06-06T16:32:13+0900

https://www.zhgopower.com/products/24kv-recloser-vacuum-circuit-breaker.html

24KV Recloser Vacuum Circuit Breaker
The 24KV breaker switch unit is comprised of three poles, the operating mechanism, and the operating mechanism housing. The sequence of the poles is A -B – C or 1 – 2 - 3 (sequence left to right when viewed from the lower terminal side of the recloser switch unit.

Each 24kv vacuum circuit breaker by GOPOWER is embedded in a solid-insulated pole made of weather-proof cyclo aliphatic epoxy resin. This enables a small design as well as resistance against environmental effects.

Breaker principle and design of 24KV Vacuum Circuit Breaker
ZW32 series 24KV circuit recloser are used in distribution systems. 24kv vacuum circuit breakes are used to make and break normal and fault currents. Breakers are fully equipped with sensors and a controller to provide a means of protection and control. For more pole top switches at bulk price.

In case of a line fault, breakers can break and make currents several times, thus avoiding longer network interruptions due to temporary faults. The manufacture, design, and testing of the vacuum recloser is based on current standards IEC 62271-111：2019

Technical Parameters of 24KV Vacuum Circuit Breaker
Products Type
ZW32-24

Maximum System Voltage
24kV

Rated Continuous Current
630A

Rated Frequency
50/60Hz

Short Time Withstand Current
20kA/1sec

Mainly Active Load Current
630A

Number of Load-break Operations
30

Short-circuit Making Current (peak)
50kA

Number of Making Operations
5 times

Cable Charging Current
25A

Line Charging Current
1.5A

Closed Loop Circuit Current
630A

Transformer Magnetizing Current
22A

Wet Condition-10sec Ph- Ph-Eth, Across Interrupters
50kV

DryCondition-1min，Ph- Ph, Phase to Earth
65kV

Dry Condition - 1 min AcrossInterrupter
79kV

Phase to Phase, Phase to Earth
125kV

Across Interrupter
145kV

Internal Arc Test
20kA /0.1 sec

Arc Extinction Medium
vacuum

Insulation Medium
vacuum

Creepage Distance (Silicon)
960mm

Dry arcing distance
200mm≥

IP Level
67

Closing/Opening Time
＜1sec

Mechanical Operations (Guaranteed)
10000times

Operating Temperature (*Manual Type)
-25～+70℃

As an electric power equipment ltd, we can provide kinds of electrical control cabinet for sale, if you have needs, please contact us.

LBS 24KV 630a SF6 Gas Load Break Switch(2024年06月06日)

gopower — 2024-06-06T16:31:33+0900

https://www.zhgopower.com/products/24kv-sf6-gas-load-break-switch.html

LBS 24KV 630a SF6 Gas Load Break Switch
24kV SF6 load break switch is a sf6 load break switch for medium voltage switchgear, using SF6 gas as arc extinguishing and insulating medium. Rate voltage was 24kV, rate current was630A

LBS 24KV 630a SF6 Gas Load Break Switch Application

The SF6 LBS 24kv 630A gas-insulated switch is a three-phase interoperable switching device designed for use in electrical distribution cabinet cabling and overhead power line segment applications.

The 24KV pole mounted disconnect switch can be operated manually in the field or remotely from the control center.

LBS 24KV 630a SF6 Gas Load Break Switch Technical Parameters
Products Type
FWX-24

Basic Ratings

Maximum System Voltage
24kV

Rated Continuous Current
630A

Rated Frequency
50/60Hz

Short Time Withstand Current
16kA/1sec

Making and Breaking Capacity

Mainly Active Load Current
630A

Number of Load-break Operations
400times

Short-circuit Making Current (peak)
40kA

Number of Making Operations
5 times

Cable Charging Current
25A

Line Charging Current
1.5A

Closed Loop Circuit Current
630A

Transformer Magnetizing Current
22A

Power Frequency Withstand Current Test

Wet Condition-10sec Ph- Ph-Eth, Across Interrupters
50kV

DryCondition-1min，Ph- Ph, Phase to Earth
64kV

Dry Condition - 1 min Across Interrupter
79kV

Impulse Withstand Current Test( 1.2 x 50 µs )

Phase to Phase, Phase to Earth
125kV

Across Interrupter
145kV

Other Ratings & Specifications

Internal Arc Test
20kA /0.1 sec

Arc Extinction Medium
SF6 Gas

Insulation Medium
SF6 Gas

Creepage Distance (Porcelain)
700mm

Creepage Distance (Silicon)
1200mm

Dry arcing distance
≥

IP Level
65

Operation Performance

Closing/Opening Time
＜1sec

Mechanical Operations (Guaranteed)
10000times

Operating Temperature (*Manual Type)
-25～+70℃

Gas Pressure

Nominal Pressure (MPa, at 20°C)
0.07

Bursting Pressure (MPa)
0.4～0.6

Minimum Gas Pressure (MPa)
0.05

Leakage Rate (cc/ sec)
≤0.5%

Voltage sensors

CT ABC 10P10 5VA
400:05:00

Incoming side and outgoing side of the voltage sensor
6 Voltage sensor（built-in）

Phase voltage：（24（36）kV/√3）/（3.25V/√3）

Special attention should be paid to the voltage sensor, which must be directly fed by the LBS load break switch.

No additional adjustment circuit can be added to the controller. The voltage signal of the switch into the test line needs to be tested separately.

If you are looking for a reliable electric power equipment company, please choose us, and we will be your best partner.

15KV SF6 Gas Load Break Switch(2024年06月04日)

gopower — 2024-06-06T16:30:49+0900

https://www.zhgopower.com/products/15kv-sf6-gas-load-break-switch/

15KV SF6 Gas Load Break Switch
15 kv pole mounted disconnect switch is suitable for rated voltage 15kV, rated current 630A, 50/60Hz distribution network breaking. The load current or overload current in a power system automatically isolates the faulty sections of the distribution line.

With the latest technology electronic controller, this manual load break switch realizes manual operation, electric operation, and remote operation. The electronic controller is installed in the stainless steel box and can be used under various climatic conditions. In addition, 15kv load break switch cable and wireless modems can be installed in the box to realize remote monitoring and control. Simple installation and arrangement on the pole are convenient, quick, and low construction cost.

Characteristics of 15KV SF6 Gas Load Breaker Switch
The 15KV pole mounted disconnect switch is made of proven durable, corrosion-resistant material. (304L stainless steel plate for warships), ensure a long service life (30years), our 15kv load break switch can carry out a series of operations, with the pole top equipment ideal characteristics.

Each GOPOWER 15kv load break switch has been filled with sf6 gas before leaving the factory, sealed treatment. The 15 kv pole mounted disconnect switch test was carried out according to IEC60265-1 (1988) GB 3804-1990 standard.

SF6 Gas 15KV Load Break Switch In Pole Mounted Switch Solution
15kv load break switch has a certain interrupting capacity because of the interrupting device, but 15 kv pole mounted disconnect switch is not as strong as the interrupting capacity of the circuit breaker, which can split the normal working current, and in the case of short circuit, he can only silently withstand the short circuit current, and if this time the manual or electric breaking may explode, so the load switch is generally used together with the current limiting fuse (load switch + fuse is not the standard configuration, and can also be used without fuse) In the event of an overload or short circuit, the circuit is broken by a fuse. In order to save costs, the load switch + fuse can replace the circuit breaker. Inquiry more pole top switches

Specification of 15 KV Pole Mounted Disconnect Switch
Products Type
FWX-15

Basic Ratings

Maximum System Voltage
15KV

Rated Continuous Current
630A

Rated Frequency
50/60Hz

Short Time Withstand Current
IKA/sec

Making and Breaking Capacity

Mainly Active LoadCurrent
630A

Number of Load-break Operations
400times

Short-circuit Making Current(peak)
50KA

Number of Making Operations on 15 KV Pole Mounted Disconnect Switch
Number of Making Operations
5 times

Cable Charging Current
lOA

Line Charging Current
lOA

Closed Loop Circuit Current
630A

Transformer Magnetizing Current
22A

Power Frequency Withstand Current Test

Wet Condition- 10 sec (Ph- Ph-Eth, Across Interrupters)
50KV

DryCondition- I min ( Phase to Phase, Phase to Earth)
50KV

Dry Condition - 1 min (Across Interrupter )
60KV

Impulse Withstand Current Test(1.2 x 50 µs)

Internal Arc Test of 15 KV Pole Mounted Disconnect Switch
Internal Arc Test
20kA /0.1 sec

Arc Extinction Medium
SF6 Gas

Insulation Medium
SF6 Gas

Creepage Distance (Porcelain)
560mm

IP Level
54

Operation Performance

Closing/Opening Tin
< O. l sec

Mechanica l Operations (Guaranteed)
l OOOO times

Operating Temperature.1re(*Manual Type)
-25～+70℃

Gas Pressure

Nominal Pressure (kg/cm2 G, at 20°C)
0.07

Bursting Pressure (kg/cm2 G)
4 ~ 6

Minimum Gas Pressure (kg/cm2 G)
0

Leakage Rate (cc/ sec)
1%

Other Ratings & Specifications of 15 KV Pole Mounted Disconnect Switch
Other Ratings & Specifications

Internal Arc Test
20kA /0.1 sec
20kA /0.1 sec
20kA /0.1 sec

Arc Extinction Medium
SF6 Gas
SF6 Gas
SF6 Gas

Insulation Medium
SF6 Gas
SF6 Gas
SF6 Gas

Creepage Distance (Porcelain)
380mm
700mm
1055mm

Creepage Distance (Silicon)
780mm
1200mm
1550mm

Dry arcing distance
≥200mm
≥
≥

IP Level
65
65
65

Operation Performance

Closing/Opening Time
＜1sec
＜1sec
＜1sec

Mechanical Operations (Guaranteed)
10000times
10000times
10000times

Operating Temperature (*Manual Type)
-25～+70℃
-25～+70℃
-25～+70℃

Gas Pressure

Nominal Pressure (MPa, at 20°C)
0.07
0.07
0.07

Bursting Pressure (MPa)
0.4～0.6
0.4～0.6
0.4～0.6

Minimum Gas Pressure (MPa)
0.05
0.05
0.05

Leakage Rate (cc/ sec)
≤0.5%
≤0.5%
≤0.5%

Voltage sensors

CT ABC 10P10 5VA
400:05:00
400:05:00
400:05:00

Incoming side and outgoing side of the voltage sensor
6 Voltage sensor（built-in） Phase voltage：（24（36）kV/√3）/（3.25V/√3）

Special attention should be paid to the voltage sensor, which must be directly fed by the 15kv load break pole mounted disconnect switch. No additional adjustment circuit can be added to the controller. The voltage signal of the switch into the test line needs to be tested separately.

Gopower Electrical Equipment & Supplies: Directly related to the production of electrical energy and transmission and distribution equipment called primary equipment. The auxiliary equipment that monitors, measures, controls and protects the primary equipment is the secondary equipment.

11KV Auto Recloser Vacuum Circuit Breaker(2024年06月06日)

gopower — 2024-06-06T16:29:40+0900

https://www.zhgopower.com/products/11kv-recloser-vacuum-circuit-breaker.html

11KV Auto Recloser Vacuum Circuit Breaker
ZW32 series 11 kv outdoor vacuum circuit breaker are used in distribution systems and pole mounted recloser. 11 kv outdoor vacuum circuit breakers are used to make and break normal and fault currents. 11kv outdoor circuit breakers are fully equipped with sensors and a controller to provide a means of protection and control. In case of a line fault, breakers can break and make currents several times, thus avoiding longer network interruptions due to temporary faults.

The manufacture, design, and testing of the 11 kv breaker by our electric power equipment ltd China is based on current standards IEC 62271-100. We can give you the most competitive 11kv vacuum circuit breaker price.

11 KV Outdoor Vacuum Circuit Breaker Application
The 11 kv outdoor vcb is equipped with one integrated current transformer per pole. The current transformer has a ratio of 600 A:5A.

VCB rating for 11kv Recloser is for protection purposes and optimized for operation with the controller. For more pole top switches at bulk price.

11KV Auto Recloser Technical Parameters
Products Type
ZW32-12

Maximum System Voltage
12kV

Rated Continuous Current
630A

Rated Frequency
50/60Hz

Short Time Withstand Current
20kA/1sec

Mainly Active Load Current
630A

Number of Load-break Operations
30

Short-circuit Making Current (peak)
50kA

Number of Making Operations
5 times

Cable Charging Current
25A

Line Charging Current
1.5A

Closed Loop Circuit Current
630A

Transformer Magnetizing Current
22A

Wet Condition-10sec Ph- Ph-Eth, Across Interrupters
45kV

DryCondition-1min，Ph- Ph, Phase to Earth
42kV

Dry Condition - 1 min AcrossInterrupter
48kV

Phase to Phase, Phase to Earth
75kV

Across Interrupter
85kV

Internal Arc Test
20kA /0.1 sec

Arc Extinction Medium
vacuum

Insulation Medium
vacuum

Creepage Distance (Silicon)
780mm

Dry arcing distance
≥200mm

IP Level
67

Closing/Opening Time
＜1sec

Mechanical Operations (Guaranteed)
10000times

Operating Temperature (*Manual Type)
-25～+70℃

As an electric power equipment ltd, we will do our best to meet all the needs of customers.

Function, Maintenance and Precautions of Outdoor VCB Breaker(2024年04月18日)

gopower — 2024-04-11T11:20:58+0900

https://www.zhgopower.com/function-maintenance-and-precautions-of-outdoor-vcb-breaker.html

Outdoor VCB vacuum circuit breaker maintenance and precautions
1. During the regular maintenance and inspection of outdoor vacuum circuit breaker, the general tasks are: measuring the overtravel and stroke of the circuit breaker; Check the vacuum interrupter for air leakage; Check whether the grounding wire of the secondary circuit is loose; Check whether the contact of auxiliary switch is good; Measure the resistance value of each phase main circuit; Remove the dust adsorbed on the conductive part and insulator; Check the fastening bolts for looseness.

2. Precautions: the switch tube of VCB breaker in operation should be monitored at any time. If pole mounted recloser is found that the contact in the switch tube is not connected or only one contact is charged, and the red or milky glow appears on the inner wall of the switch tube, the emptiness in the tube is reduced and can not be used any more. The outdoor VCB breaker tube should be replaced immediately.

Outdoor VCB Function
Protect large silicon rectifier and other high voltage electrical equipment, such as 11kv outdoor circuit breaker and 24kv vacuum circuit breaker.

When the vacuum circuit breaker is in the closing position, its ground insulation is borne by the supporting insulator. Once the permanent ground fault occurs in the circuit connected to the vacuum automatic circuit recloser and the ground fault point is not cleared after the circuit breaker tripping, the ground insulation of the current bus is also borne by the vacuum gap of the circuit breaker fracture; When various faults break, the vacuum insulation gap between a pair of contacts on the fracture surface should withstand the effects of various recovery voltages without breakdown.

Inquiry China vacuum circuit breaker price from auto recloser manufacturer.

Daily Maintenance of Vacuum Circuit Breaker(2024年04月17日)

gopower — 2024-04-11T11:20:20+0900

https://www.zhgopower.com/daily-maintenance-of-vacuum-circuit-breaker.html

The maintenance methods of automatic circuit recloser or routine maintenance of it: how to ensure it is in good working state, clean pipe protection, replace rubber parts regularly and check the main components regularly. These ensure the normal operation of outdoor vacuum circuit breakers. In order to keep it in good working condition, the vcb breaker maintenance and management must be strengthened.

The following are the maintenance methods of the outdoor VCB vacuum circuit breaker provided by Gopower.

Inquiry China auto recloser circuit breaker from auto recloser manufacturer.

1. Keep the automatic circuit recloser in a nice environment
(1) The humid gas is decomposed into hydrogen, oxygen and other mixed gases under the action of arcing, which damages the insulation between the fractures and the main contact. It makes the arc difficult or reburning. What is worse, it may cause the explosion of the arc extinguishing chamber.

(2) The insulation strength of the supporting porcelain bottle and the arc extinguishing chamber are reduced, which results in surface discharge.

(3) The patent leather, rust slag and other foreign objects in the pipeline of the vacuum circuit breaker may block the airport, so that the main circuit breaker action failure, the clamping phenomenon occurs.

(4) If the foreign objects enter the arc extinguisher chamber, it may cause poor contact, so that the nonlinear resistance will be burned due to long-term electricity. And it will cause the nonlinear resistance porcelain bottle to burst seriously. Therefore, the intake pipe of the main circuit breaker air storage cylinder is equipped with an oil and water separator, and the lower part of the water discharge valve. All these regularly drained during the use and maintenance of pole mounted auto recloser to keep the air path clean.

2. Replace the rubber parts of automatic circuit recloser regularly
The main automatic recloser is a kind of pneumatic and electric with a complex structure. And power line recloser's components have high requirements on sealing performance. In order to ensure good sealing performance, the rubber parts of outdoor vacuum circuit breakers should be replaced regularly.

3. Check the main components of outdoor VCB vacuum circuit breaker regularly
(1) Arc extinguishing chamber

The state of the recovery spring of its main contact over range and moving contact should be regularly detected. Due to the mutual friction and frequent parting and closing, the dynamic and static contacts will wear, which results in the reduction of over range and contact pressure. When the over range is reduced to a certain extent, the dynamic and static contacts should be replaced. When the deformation of the moving contact recovery spring exceeds a certain limit, it must be replaced in time.

(2) Nonlinear resistance

Keeping the inside of the nonlinear resistance porcelain bottle clean and sealed. Replacing the desiccant in the vacuum load break switch nonlinear resistance porcelain bottle regularly. Checking the resistance value of the nonlinear resistance plate, and replacing it in time when the change of the resistance value exceeds a certain limit.

(3) Main valve

Checking the fit size between piston and valve body regularly. If the size does not meet the requirements, it should be replaced in time.

(4) Transmission air cylinder

To adjust the buffer of the transmission air cylinder properly. To ensure the disconnecting switch works well. Checking the matching accuracy between the piston of outdoor vacuum circuit breaker and cylinder block regularly. These ensure its good action performance by dressing or replacing parts.

(5) Ventilation plug door

The filler in the stopper must be replaced regularly, and the ventilation rate of the stopper must be tested. And adjusting it to the allowable range.

Gopower electric power equipment company provides primary equipment, secondary and tertiary equipment whole-system equipment in centralized style as well as local style.

Working Principles of Sf6 Gas Load Break Switch(2024年04月16日)

gopower — 2024-04-11T11:19:42+0900

https://www.zhgopower.com/working-principles-of-sf6-gas-load-break-switch.html

Broadly speaking, there will be many types of high-voltage ring network cabinets, including vacuum circuit breakers, gas-filled cabinets, and central cabinets. sf6 gas load circuit breaker is called ring main unit or high voltage ring main unit in the power industry. Although vacuum circuit breaker cabinets, gas-filled cabinets, and center cabinets belong to the ring network cabinet, they are not called ring network cabinets.

SF6 gas analysis of SF6 gas load break switch
SF6 gas was discovered and used by people in the early twentieth century. SF6 gas is a colorless, odorless, non-toxic, non-flammable, chemically stable gas, and its density is 5 times that of air. SF6 gas molecules are negatively charged and have a strong ability to absorb free electrons to form negative ions, so they have extremely high electrical resistance and good insulation properties. Moreover, the SF6 gas of the load break switch has a low dissociation temperature and a low dissociation energy, so it has excellent arc extinguishing performance. SF6 has been widely used in the electric power industry because of its superior insulation performance and arc extinguishing performance.

Working principles of SF6 gas load break switch
The performance of the high-voltage ring main unit depends on the performance of the SF6 gas load break switch, so the sf6 gas load disconnect switch is the most important part of the ring main unit. SF6 load break switch is divided into three stations and two stations, the difference lies in whether there is a grounding switch. The sf6 gas load disconnect switch is an integrated switch of load switch, isolating switch and grounding switch, which is installed in a closed SF6 gas box. The shell is made of epoxy resin, which has heat-resistant insulation properties and is also a common material in the power industry. Therefore, the sf6 gas load circuit breaker has good insulation and arc extinguishing performance, and can be used for more than 20 years under normal maintenance.

The load switch is switchgear with a simple arc extinguishing device. Load switches that use SF6 gas as insulation and arc extinguishing medium are called load break switch SF6. The SF6 gas load break switch can be used for the closing and breaking of load current and overload current, as well as the closing and breaking of no-load circuits, no-load transformers and capacitor banks. All three-position load switches with connection, disconnection and grounding functions have the characteristics of simple structure and low price. To buy a load disconnect switch, look for Gopower. Gopower is worthy of your trust!

11kv Lbs And 15kv Pole Mounted Disconnect Switch
Gopower has many types of medium voltages LBS load break switch, in which 11kv load break switch and 15 kv pole mounted disconnect switch are very popular in our board and overseas customer, welcome to get enquiry now!

Working Principle and Advantages and Disadvantages of VCB Breaker(2024年04月15日)

gopower — 2024-04-11T11:19:05+0900

https://www.zhgopower.com/working-principle-and-advantages-and-disadvantages-of-vcb-breaker.html

Auto Recloser Vacuum Circuit Breaker Operation Working Principle
Circuit breaker, also known as air switch, automatic circuit recloser. When the working current exceeds the rated current or short circuit and voltage loss occurs, the auto circuit recloser circuit will be automatically cut off. Compared with other circuit breakers, VCB vacuum circuit recloser are only different in arc extinguishing medium. There is no conductive medium in a vacuum, which makes the arc extinguish quickly, so the distance between the moving and stationary contacts of the circuit breaker is very small. The VCB breaker uses the plasma to rapidly diffuse and extinguish the arc when the current in high vacuum flows through the zero point, so according to working principle of vacuum circuit breaker, as to complete the purpose of cutting off the current. Inquiry electrical power equipment from auto recloser manufacturer.

Advantages and Disadvantages of Vacuum Circuit Breaker
Advantages of VCB pole mounted auto recloser
1. The arc of VCB circuit breaker is extinguished in the sealed container, and the arc and hot gas are not exposed;

2. The contact gap is very small, only a few mm to 40 mm.

3. Short arcing time, low arcing voltage, small arcing energy, less contact wear and more allowable breaking times. We have 11kv outdoor circuit breaker and recloser 24kv and 33kv auto recloser.

4. The inertia of the moving conducting pole is small and suitable for frequent operation;

5. Simple structure, small volume and light weight;

6. Low noise during operation;

7. There is no oil, so there is no danger of fire and explosion;

8. The contact part is completely sealed, so it is not easy to reduce the performance due to the influence of moisture, dust, harmful gas, etc. the breaking and closing performance is stable, the contact wear is small, and the service life is long.

2. It is difficult to monitor the vacuum degree during operation;

3. The composite insulator is easy to accumulates dust in the operation of a thermal power plant, so the environment of the auxiliary power room should be relatively clean.

As a professional electric power equipment ltd, we will do our best to meet all the needs of customers.

VCB Pole Mounted Recloser(2024年04月14日)

gopower — 2024-04-11T11:18:16+0900

https://www.zhgopower.com/products/vacuum-circuit-breaker/

ZW32 series vacuum circuit recloser, produced by Gopower pole mounted auto recloser manufacturer, is used in distribution systems. Pole mounted auto reclosers are used to make and break normal and fault currents. VCB pole mounted auto reclosers are fully equipped with sensors and a controller to provide protection and control. In case of a line fault, the pole mounted recloser, an automatic vacuum circuit recloser, can break and make currents several times, thus avoiding longer network interruptions due to temporary faults.

As an electric power equipment company, we manufacture, design, and test the pole mounted auto recloser based on current standards IEC 62271-100. Gopower, which is the standard for China VCB circuit breaker manufacturer to produce qualified vacuum circuit reclosers and offer satisfying services for the customers. If you want to buy an auto recloser circuit breaker, please contact us, because our electrical recloser circuit breaker price is competitive in the recent market.

Types of Auto Recloser Circuit Breaker
Outdoor auto recloser circuit breaker, also known as an outdoor pole mounted load break switch, is an indoor power distribution 3 phase recloser in 11kv, 24kv, 33kv, normal 24kv vacuum circuit breaker can be used for the protection and control of electrical equipment in industrial and mining enterprises, power plants and substations. The outdoor auto recloser circuit breaker is especially suitable for places requiring no oil, less maintenance and frequent operation. The auto recloser circuit breaker as pole top switches can be configured in central cabinet, double-layer cabinet and fixed cabinet as control and protection of high-voltage electrical equipment.

we can offer types of VCB automatic line recloser circuit breakers, such as 11kv auto reclosers, 33kv automatic circuit recloser, and other electrical power equipment.

Advantages of VCB Vacuum Circuit Recloser
Pole mounted auto recloser is named because its arc extinguishing medium and insulating medium of contact gap after arc extinguishing is high vacuum. Pole mounted recloser, based on the working principle of vacuum circuit breaker, has the advantages of small volume, lightweight, suitable for frequent operation and arc extinguishing without maintenance. Vacuum type circuit breaker is widely used in a distribution network.

Auto Recloser Working Principle
Auto recloser circuit breaker, referred to as recloser pole, is a high-voltage switchgear with its own control and protection functions. Automatic circuit recloser can automatically detect the current passing through the main circuit of the recloser, automatically disconnect the fault current according to the inverse time limit protection in case of fault, and reclose multiple times according to the predetermined delay and sequence.

Vacuum Circuit Recloser FAQs
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Difference Between Auto Recloser Circuit Breaker and Circuit Breaker
Recloser vs circuit breaker are as follows: the pole mounted auto recloser is a kind of high-voltage switchgear with its own control and protection functions; it can automatically detect the current through the main loop of the recloser, protect the fault current automatically according to the reverse time limit in the event of failure, and coincide multiple times according to the predetermined delay and sequence. A automatic recloser circuit breaker is a switching device that can close, carry and open current under normal loop conditions and can close, carry and open current under abnormal loop conditions within a specified period of time.

Vacuum Circuit Recloser Construction And Automatic Circuit Recloser Operation
Vacuum load break automatic recloser switch mainly includes three parts: vacuum arc extinguishing chamber, electromagnetic or spring operating mechanism, support and other components. At pole mounted auto recloser manufacturer, the working principle of pole mounted recloser is: when the moving and static contacts are opened under the action of the operating mechanism, an arc is generated between the contacts, and the contact surface volatilizes steam at high temperatures. Because the contact is designed in a special shape, a magnetic field is generated when the current passes through. Under the action of this magnetic field, the arc moves rapidly along the tangent direction of the contact surface, and some metal steam condenses on the metal cylinder (shielding cover). The arc extinguishes when it naturally crosses zero, and the dielectric strength between the contacts recovers rapidly. This is the principle of vcb breaker operation.

The arc extinguishing principle of the auto recloser circuit breaker is: like any kind of high-voltage switch, extinguishing the arc depends on the interrupter chamber. The interrupter is the heart of a high-voltage switch. When the movable and static contacts of the switch are separated, under the action of high electric field, the media particles around the contacts become ionized, thermally free and collisionally free, thus producing an electric arc.

As one of auto recloser types manufacturer, we manufacture VCB recloser circuit breaker according to its working principle of vcb. If the moving and static contacts are in an absolute vacuum, when the contacts are opened and closed, no arc is generated because there is no material present, and the circuit is easily broken. If you want to know more details about VCB breaker working principle, please contact us.

Auto Recloser Circuit Breaker Uses
Auto recloser circuit breaker has been widely used in China. Especially in the field of medium voltage vacuum circuit breaker, our auto recloser circuit breaker have obvious advantages. VCB automatic recloser circuit breaker is now widely used in power systems and has become the key electrical for the effective control of power supply and consumption system. In practical work, only by fully understanding its performance requirements, finding problems in time and taking corresponding measures can we ensure the safe, reliable and economic operation of power supply and consumption system.

ZW32-24/630-20 type automatic circuit reclosers is widely used in urban power grids or rural power grids as a section switch or contact switch, for outdoor substations of the rural power distribution system as an outlet switch, for 10kV system as a split and combined load current, overload current, and short circuit current protection.

If you want to know more about 33kv auto recloser price, please visit our website.

SCADA Remote Terminal Units RTU(2024年04月13日)

gopower — 2024-04-11T11:17:31+0900

https://www.zhgopower.com/products/remote-terminal-unit-rtu/

As one of the top SCADA RTU manufacturers,Remote terminal unit scada is a general term for various remote monitoring installed in the distribution network, SCADA remote terminal units has functions such as data collection, control, and communication.

BD-163 distribution automation master terminal unit in SCADA RTU is a new generation of China power distribution cabinet based on the latest generation of automated remote terminal technology from China SCADA RTU manufacturers. The rtu remote terminal unit like our MCC cabinets electrical is the eyes and limbs of the power distribution automation system. The operating status of RTU in SCADA system is related to the data reliability, performance accuracy and operational safety of the power distribution automation. When the configuration is correct and the operation is normal, the SCADA RTU system realizes the correct operation of switches, rapid fault isolation and power restoration, thereby improving power supply reliability.

SCADA Remote Terminal Units Technical Parameters
SCADA Remote Terminal Unit Features

Remote terminal unit rtu With "communication", the SCADA RTU system has a "remote maintenance" function.

Flexible configuration, all protection functions have a separate retreat.

The RTU for SCADA system has a complete self-checking function to detect the working conditions of each part online.

The closing and closing circuit adopts an anti-misoperation design and has an anti-missing function.

Applicable to analog acquisition, state quantity acquisition, local and remote control switch closing of 4-12 switch.

24 channels can be controlled by expansion.

By selecting different configurations, remote terminal unit can meet the needs of “Three Remote” and “Two Remote” of the State Grid and South Grid.

Meet the special requirements of all parts of the country (such as Shandong, Beijing, Guangdong, etc.)

Zero-sequence current setting adaptive function, no manual setting required.

Meet the specific requirements of “one or two integration".

The core RTU unit can be flexibly configured to shade vertical, shaded horizontal, outdoor vertical, an d group screen.
Technical parameters of SCADA Remote Terminal Unit
Function of RTU in SCADA System
Distribution Terminal Unit-DTU installation location: indoor and outdoor opening and closing station, power distribution room, knife lock chamber, box change, switch, it can detect line fault and overload status function, and can detect line zero sequence overvoltage, zero sequence overcurrent, line overload, line overcurrent, phase-to-phase short circuit protection, etc. At gopower scada rtu manufacturers, It can be flexibly set to alarm and trip action. And record the fault event.

The main functions of the scada remote terminal unit system are

RTU unit realize comprehensive coverage and monitoring of the operating conditions of power distribution terminals, and quickly retrieve and locate each terminal through the terminal list column;

RTU in SCADA RTU system realize remote monitoring of distribution terminal channel working conditions and board status, and timely alert terminal equipment defect information through the event warning window;

Remote terminal unit in SCADA realize the remote query of the fixed value setting of the SCADA in electrical power system, the content of the information table and the program version, and complete the program upgrade, the fixed value placement, and the modification of the information table remotely through the remote setting bar;

RTU for SCADA realize the remote query and download of the information in the memory of the power distribution terminal, such as remote signal displacement, over-current alarm, remote control operation record and other local information.

What is RTU in SCADA
Different from the and feeder remote terminal unit, the remote operation and maintenance system of the remote terminal unit in SCADA, Remote terminal unit RTU is composed of a communication management server, a Web server, network security protection equipment, and a maintenance workstation: the communication management server is used to provide direct communication with remote terminals and collect status information and parameter information of each SCADA remote terminal unit. At Zhgopower, one of the top remote terminal unit SCADA manufacturers, the data gathered by the remote terminal unit in SCADA is forwarded to the web server based on the data requested by the web server, and the remote terminal unit SCADA parameter setting command issued by the webserver is forwarded to the terminal; the web data server is used to provide a high-performance network service to provide users with browsing and modifying remote terminal unit RTU parameters and status. The interface also displays terminal real-time letter and wish data, and realizes various functions of human-computer interaction.

Remote Terminal Unit vs PLC
RTU is the basic unit of SCADA system, which is an electronic device installed on a remote site to monitor, measure and collect sensors and equipment installed on a remote site. PLC is a programmable logic controller, which performs data collection and instruction processing in the field station. Compared with the PLC, there are three main advantages:

Feeder remote terminal unit RTU is generally not restricted by the geographical environment and can be installed near the outdoor on-site measurement point.

Since SCADA RTU is not restricted by the working environment, its technical specifications are required to meet harsh environment requirements and specific requirements. Its data storage capacity is large, the analog quantity acquisition ability is strong (up to 24 channels), and the analog function is far more powerful than PLC.

The RTU SCADA communication function, an essential function of the RTU in a SCADA system, is powerful. It will finally transmit the collected analog, switch, and digital information to the dispatch center, and the dispatch center is sometimes thousands of miles away, it is required to have a remote communication function. Although PLC also has a communication function, it is limited to the short-distance transmission of data within the plant station, and its communication function is slightly inferior to that of RTU.

Pole Top Switches(2024年04月12日)

gopower — 2024-04-11T11:16:42+0900

https://www.zhgopower.com/products/pole-mounted-switch/

The pole mounted disconnect switch, also known as a pole top switch, is a kind of safety switch used on the electric pole to ensure the safety of electricity. Pole top switches' main function is to isolate the high voltage of the circuit. According to the arcing capacity of the contact, Gopower pole mounted switch can be divided into pole top recloser & load brake switch. Besides, sf6 load break switch including load break switch 11kv and 15 kv pole mounted disconnect switch,24kv and 33kv LBS.

Types of Pole Top Switches

There are many types of load break disconnect pole top switches, including SF6 Gas Load Break Switch and Vacuum Circuit Breaker. We offer different specifications of SF6 Gas Load Break Switch, such as 11kv load break switch, 33kv load break switch and 15 kv pole mounted disconnect switch , etc. Vacuum Circuit Breakers also have various specifications, including 11kv outdoor circuit breaker, 24kv vacuum circuit breaker, 33kv automatic circuit recloser, each designed based on the working principle of vacuum circuit breaker, and so on. If you want to buy pole top switches, please send your demands to us.

SF6 Gas Load Break Switch (SF6 LBS)
SF6 load break switch is suitable for the distribution network with the highest voltage 12/24/36kV, the rated current 630A and the rated frequency 50/60Hz.

VCB Pole Mounted Recloser
ZW32 series Breakers are used in distribution systems. Circuit breakers are used to make and break normal and fault currents.

How Does a Load Break Switch Work

Load switch is a kind of pole top switches with a simple arc extinguishing device. The outdoor pole mounted load break switch uses SF6 gas as insulation and arc extinguishing medium is called the SF6 load break switch. It can be used for closing and breaking load current and overload current, or as for closing and breaking no-load circuits, no-load transformers and capacitor banks, all three-position load switches with the functions of connecting, disconnecting, and grounding have the characteristics of simple structure and low price. The pole mounted disconnect switch is actually a very useful power electrical equipment type. When the switch is closed, it can carry the relevant working currently and short-circuit current on the transportation circuit and protect the safety; When it is in the opening state, it will have a good insulation function, and a relatively obvious relevant port made of insulating material will be formed between the separated contacts. In general, as long as the pole mounted switch is installed, it will not cut off the load current and short-circuit current at will.

What's more, the relevant parts of the switch, provided by remote terminal unit manufacturers, can be used to set other fractures, such as setting for the line, and the port for managing the circuit fracture can be opened and closed at the same time. Therefore, they can meet the needs of circuit maintenance or reorganization in different states.

As an electric power equipment ltd, we will do our best to meet all the needs of customers.

Distributed Type DTU(2024年04月11日)

gopower — 2024-04-11T11:15:43+0900

https://www.zhgopower.com/products/distribution-type-dtu.html

The distributed DTU power distribution terminal is suitable for the protection, measurement and control, and communication of the interval unit of the ring network cabinet with a voltage level of 10kV and below. Equipped with complete protection, measurement, control and communication monitoring functions, the mcc main control cabinets electrical cooperates with circuit breakers, load switches and other switches to provide protection for lines and feeder lines of 10kV and below, using complete protection functions to quickly isolate and isolate fault areas and reduce power outages Range, rapid restoration of power supply, and a strong guarantee for the safe and stable operation of the scada remote terminal units and distribution network system.

Features of Distribution Automation Terminal
Distributed structure, it composed by several interval units and public units.

The software platform adopts the powerful Linux operating system of real-time multi-tasking and multi-threading.

The rtu remote terminal unit can record the first 4 cycles of the faulty line and 8 cycles after the failure during the fault recording of the device, and record 64 points for each cycle. Use the device maintenance tool to perform detailed analysis on the recording files, and the waveform details can be seen at a glance.

Miniaturization, each unit of the terminal adopts a small structure, and the structure is small and convenient for mass production and mass testing

The installation is simplified, and the terminal adopts a unified and easy-to-plug interface, suitable for installation and replacement

Large size LCD screen with 160*160 resolution, terminal operating conditions can be seen at a glance

It has a variety of communication interfaces and a variety of standard communication protocols. In addition to the internal data management function, it can also forward the data of electricity meters, PLC and DC screen in the distribution room or on and off station, and complete the data transmission and other functions by communicating with the master station system through a standard unified interface

Main Purpose of Distribution Automation Terminal
Installed in conventional switching stations (stations), outdoor small switching stations, ring main unit, small substations, box-type substations, etc., to complete the position signal, voltage, current, active power, reactive power, and collection and calculation of electric energy and other data, etc., to perform opening and closing operations on the switch, to realize the fault identification and isolation of the feeder switch and the restoration of power supply to the non-fault section. Report the processing process and results to the main electrical distribution cabinet.

Advantages of Distribution Automation Terminal
Use miniaturized distributed DTU to transform the existing ring main unit, which greatly saves installation space and solves the problems of large installation volume, complicated wiring, and long power outage time and so on.

It does not depend on the global information of the master station or the sub-station

Fast processing and reliable action

When the operation mode of the distribution line changes, the logic is adaptive.

No need to reclose multiple times, reducing the impact on the equipment.

If you want to know more kinds of mcc electrical cabinets , please visit our website.

As an electric power equipment company, we will do our best to meet all the needs of customers.

Recloser Control Box-Feeder Terminal Unit(2023年05月31日)

gopower — 2023-05-31T12:00:03+0900

https://www.zhgopower.com/products/control-box-feeder-terminal-unit.html

The feeder terminal unit(FTU) is a new HV switch control device of control cabinet enclosures equipped with both the imported DSP high-speed sampling chips and the high-performance ARM chips, and can fast and stably finish the monitoring on the switch.

Industrial feeder remote terminal unit by our electric power equipment company has such functions as the protection, measuring, controlling, monitoring, communication, remote control, and so on and features high integration level, flexible configuration, and user-friendly interface. Electrical control cabinet are widely applied to the radiant and ring network power supply systems.

FTU outdoor control electrical control box can help the electrical distribution cabinet systems identify transient and permanent line faults. Outdoor control box eliminate the impact of transient line faults automatically, isolate the permanent fault segments to avoid prolonged power failure in a large area, and automatically recover the power supply in fault-free areas, so as to realize the automation of power distribution network in an economical and practical way.

Recloser Control Box-feeder Remote Terminal Unit Key Functions

Recloser Control Box-Feeder Terminal Unit Communication Protocols

Recloser Control Box-feeder Remote Terminal Unit Technical Parameters

Recloser Control Box-feeder Remote Terminal Unit Characteristic Functions
Feeder terminal unit is small in size and large in quantity. FTU electrical control cabinet is equipped with a transmitter for direct AC sampling. It is resistant to high temperature and cold and is suitable for outdoor harsh environments.

Unlike the scada remote terminal unit, the amount of data collected by FTU electronic recloser controller box is small, the requirement of communication rate is low, and the requirement of reliability is high.

FTU outdoor recloser controller box can be manufactured by a high-performance single-chip microcomputer. In order to adapt to the harsh environment, industrial chips that can work at 75 ℃ shall be selected, and they shall be protected against lightning, rain and moisture through appropriate structural design.

Recloser Control Box-feeder Remote Terminal Unit Application
At present, feeder terminal units power recloser controller box as one popular type of distribution electrical box have been widely deployed in column switches, ring network cabinets, switching stations, power recloser controller boxes, and other places on the distribution network line to realize the "three remote" automation functions of remote signaling, telemetry and remote control of remote primary equipment.

As an information and data communication tool, a computer network provides a powerful communication means for industrial electrical cabinet and provides a reliable basis for realizing the networked control of distribution automation system devices. Fieldbus technology and GPRS wireless communication technology inject new vitality into the implementation of feed automation. Driven by network, communication and other information technologies, distribution automation is developing from spontaneous Island automation to unified and systematic comprehensive automation.

Centralized Type DTU(2023年05月31日)

gopower — 2023-05-31T11:59:25+0900

https://www.zhgopower.com/products/centralized-type-dtu.html

The centralized DTU adopts high-performance MCU processor, high-speed industrial network communication technology, multi-CPU integration technology and Linux operating system. The product has strong stability, high reliability, good real-time performance, and strong environmental adaptability. Mainly used in the ring network cabinets, switching stations, box-type substations, etc. in the distribution network, combined with the main distribution station, it can quickly and reliably realize the fault location and isolation of the electrical distribution cabinet and the restoration of the power supply in the non-faulty section. It is a kind of new generation of scada remote t erminal units for distribution automation that integrates telemetry, remote control, protection and communication functions.

Description and Functions of Centralized Type DTU
With "communication", it has "remote maintenance" function.

Flexible configuration, all protection functions have separate retreat.

The device has a complete self-checking function to detect the working conditions of each part online.

The closing and closing circuit adopts anti-misoperation design and has anti-missing function.

Applicable to analog acquisition, state quantity acquisition, local and remote control switch closing of 4-12 switch

24 channels can be controlled by expansion

By selecting different configurations, it can meet the needs of “Three Remote” and “Two Remote” of State Grid and South Grid.

Meet the special requirements of all parts of the country (such as Shandong, Beijing, Guangdong, etc.)

Zero-sequence current setting adaptive function, no manual setting required

Meet the specific requirements of “one or two integration”

The core unit can be flexibly configured to shade vertical, shaded horizontal, outdoor vertical and group screen.

Technical Parameters of Centralized Type DTU

We can offer kinds of master terminal unit for sale, if you have needs, please contact us.

If you are looking reliable electric power equipment company, please choose us, and we will be your best partner.

33KV SF6 Gas Load Break Switch(2023年05月31日)

gopower — 2023-05-31T11:58:47+0900

https://www.zhgopower.com/products/33kv-sf6-gas-load-break-switch.html

These load break switch 33kv are intended for outdoor applications. They can be mounted either horizontally or vertically, and are suitable for electrical operation and power distribution by power distribution cabinet. These 33kv load break switch are tested by our quality controllers on various parameters before delivering them to our valued customer ends. We manufacture these switches with the help of cutting edge technology, which allows us to deliver a flawless product that is sure to be flawless as well. The 33 kV live parts are not directly touchable and hence guarantee protection from hazards.

33kv Load Break SwitchTechnical Parameters
Products TypeFWX-36
Basic Ratings
Maximum System Voltage36kV
Rated Continuous Current630A
Rated Frequency50/60Hz
Short Time Withstand Current16kA/1sec
Making and Breaking Capacity
Mainly Active Load Current630A
Number of Load-break Operations400times
Short-circuit Making Current (peak)40kA
Number of Making Operations5 times
Cable Charging Current25A
Line Charging Current1.5A
Closed Loop Circuit Current630A
Transformer Magnetizing Current22A
Power Frequency Withstand Current Test
Wet Condition-10sec Ph- Ph-Eth, Across Interrupters70kV
DryCondition-1min，Ph- Ph, Phase to Earth95kV
Dry Condition - 1 min Across Interrupter110kV
Impulse Withstand Current Test( 1.2 x 50 µs )
Phase to Phase, Phase to Earth195kV
Across Interrupter215kV
Other Ratings & Specifications
Internal Arc Test20kA /0.1 sec
Arc Extinction MediumSF6 Gas
Insulation MediumSF6 Gas
Creepage Distance (Porcelain)1055mm
Creepage Distance (Silicon)1550mm
Dry arcing distance≥
IP Level65
Operation Performance
Closing/Opening Time＜1sec
Mechanical Operations (Guaranteed)10000times
Operating Temperature (*Manual Type)-25～+70℃
Gas Pressure
Nominal Pressure (MPa, at 20°C)0.07
Bursting Pressure (MPa)0.4～0.6
Minimum Gas Pressure (MPa)0.05
Leakage Rate (cc/ sec)≤0.5%
Voltage sensors
CT ABC 10P10 5VA400:05:00

Incoming side and outgoing side of the voltage sensor
6 Voltage sensor（built-in）
Phase voltage：（24（36）kV/√3）/（3.25V/√3）

Special attention should be paid to the voltage sensor, which must be directly fed by the 33KV load break interrupter switch.

No additional adjustment circuit can be added to the controller. The voltage signal of the 33kv load break switch into the test line needs to be tested separately.

24KV Recloser Vacuum Circuit Breaker(2023年05月31日)

gopower — 2023-05-31T11:56:43+0900

https://www.zhgopower.com/products/24kv-recloser-vacuum-circuit-breaker.html

The 24KV breaker switch unit is comprised of three poles, the operating mechanism, and the operating mechanism housing. The sequence of the poles is A -B – C or 1 – 2 - 3 (sequence left to right when viewed from the lower terminal side of the recloser switch unit.

Breaker principle and design of 24KV Vacuum Circuit Breaker
ZW32 series 24KV circuit automatic recloser are used in distribution systems. 24kv vacuum circuit breakes are used to make and break normal and fault currents. Breakers are fully equipped with sensors and a controller to provide a means of protection and control. For more pole top switches at bulk price.

Technical Parameters of 24KV Vacuum Circuit Breaker
Products TypeZW32-24
Maximum System Voltage24kV
Rated Continuous Current630A
Rated Frequency50/60Hz
Short Time Withstand Current20kA/1sec
Mainly Active Load Current630A
Number of Load-break Operations30
Short-circuit Making Current (peak)50kA
Number of Making Operations5 times
Cable Charging Current25A
Line Charging Current1.5A
Closed Loop Circuit Current630A
Transformer Magnetizing Current22A
Wet Condition-10sec Ph- Ph-Eth, Across Interrupters50kV
DryCondition-1min，Ph- Ph, Phase to Earth65kV
Dry Condition - 1 min AcrossInterrupter79kV
Phase to Phase, Phase to Earth125kV
Across Interrupter145kV
Internal Arc Test20kA /0.1 sec
Arc Extinction Mediumvacuum
Insulation Mediumvacuum
Creepage Distance (Silicon)960mm
Dry arcing distance200mm≥
IP Level67
Closing/Opening Time＜1sec
Mechanical Operations (Guaranteed)10000times
Operating Temperature (*Manual Type)-25～+70℃

LBS 24KV 630a SF6 Gas Load Break Switch(2023年05月31日)

gopower — 2023-05-31T11:55:59+0900

https://www.zhgopower.com/products/24kv-sf6-gas-load-break-switch.html

24kV SF6 load break switch is a sf6 load break switch for medium voltage switchgear, using SF6 gas as arc extinguishing and insulating medium. Rate voltage was 24kV, rate current was630A

LBS 24KV 630a SF6 Gas Load Break Switch Application

The SF6 LBS 24kv 630A gas-insulated switch is a three-phase interoperable switching device designed for use in electrical distribution cabinet cabling and overhead power line segment applications.

The 24KV pole mounted disconnect switch can be operated manually in the field or remotely from the control center.

LBS 24KV 630a SF6 Gas Load Break Switch Technical Parameters

If you want to know more kinds of auto recloser, please visit our website.

As a reliable electric power equipment company, we will provide more kinds of related products for sale, anything you need, please leave us a message.

15KV SF6 Gas Load Break Switch(2023年05月31日)

gopower — 2023-05-31T11:55:18+0900

https://www.zhgopower.com/products/15kv-sf6-gas-load-break-switch/

15 kv pole mounted disconnect switch is suitable for rated voltage 15kV, rated current 630A, 50/60Hz distribution network breaking. The load current or overload current in a power system automatically isolates the faulty sections of the distribution line.

Characteristics of 15KV SF6 Load Break Switch
The 15KV pole mounted disconnect switch is made of proven durable, corrosion-resistant material. (304L stainless steel plate for warships), ensure a long service life (30years), our 15kv load break switch can carry out a series of operations, with the pole top equipment ideal characteristics.

Specification of 15 KV Pole Mounted Disconnect Switch

Number of Making Operations on 15 KV Pole Mounted Disconnect Switch

Internal Arc Test of 15 KV Pole Mounted Disconnect Switch

Other Ratings & Specifications of 15 KV Pole Mounted Disconnect Switch

11KV Auto Recloser Vacuum Circuit Breaker(2023年05月31日)

gopower — 2023-05-31T11:53:59+0900

https://www.zhgopower.com/products/11kv-recloser-vacuum-circuit-breaker.html

ZW32 series vcb 11kv outdoor vacuum circuit breakers are used in distribution systems and pole mounted recloser. 11 kv outdoor vacuum circuit breakers are used to make and break normal and fault currents. 11kv outdoor circuit breakers are fully equipped with sensors and a controller to provide a means of protection and control. In case of a line fault, breakers can break and make currents several times, thus avoiding longer network interruptions due to temporary faults.

The manufacture, design, and testing of the 11 kv outdoor vacuum circuit breakers by our electric power equipment ltd China is based on current standards IEC 62271-100. We can give you the most competitive 11kv circuit breaker price .

11 KV Outdoor VCB Vacuum Circuit Breaker Application
The 11 kv breaker is equipped with one integrated current transformer per pole. The current transformer has a ratio of 600 A:5A.

VCB rating for 11kv Recloser is for protection purposes and optimized for operation with the controller. For more pole top switches at bulk price.

11KV Auto Recloser Technical Parameters

SF6 Gas 11 KV Load Break Switch(2023年05月31日)

gopower — 2023-05-31T11:50:58+0900

https://www.zhgopower.com/products/11kv-sf6-gas-load-break-switch/

The load break switch 11kv is suitable for the distribution network with the highest voltage 11kV, the rated current 630A, and the rated frequency 50/60Hz, which can break off and close the load current and overload current in the power system. The 11 KV LBS is equipped with an intelligent controller to realize the automation of the distribution system. Inquiry 11kv load break switch price.

SF6 LBS Gas 11 KV Load Break Switch Features
The operating mechanism with spring energy storage ensures fast closing and switching operation (<1000ms).

Operator place: Local/Remote.

11KV LBS equipped with an electronic controller, this sf6 load break switch can be operated locally or with FTU/RTU interface for console operation.

SF6 Gas 11 kv Load Break Switch In Pole Mounted Switch Solution
The type of high-voltage bypass type SF6 11KV LBS insulated load switch is divided into manual type and electric type, which is an engineering bypass type load switch used for the maintenance and construction of power distribution cabinet in order to make uninterrupted power supply to distribution lines. This load break switch 11kv uses SF6 gas which has outstanding insulation and arc extinguishing performance. Inquiry 11kv load break switch price. Check more pole top switches.

SF6 Gas 11KV Load Break Switch PDF Specification

Environmental Conditions for Equipment Use of SF6 Gas 11KV Load Break Switch

11 KV Load Break Switch Working Procedure
The 11KV LBS load switch that uses SF6 gas as insulation and arc extinguishing medium is called the SF6 gas load break switch. It can be used to switch and switch load current and overload current, and it can also be used to switch and switch no-load circuits, no-load transformers, and capacitors. Groups, etc., all three-position load switches with the functions of connecting, disconnecting, and grounding have the characteristics of simple structure and low price. But the load switch cannot disconnect the short-circuit current.

Intended Use of SF6 Gas 11KV Load Break Switch
The 11KV LBS SF6 load switch is an excellent load switch that many users have experienced in recent years. In addition to its long electrical life and strong braking force, it has the same advantages as the vacuum load switch. Its outstanding advantage is that it is easy to achieve three working positions (connected, disconnection and grounding), small current (inductance, capacitance) breaking, strong resistance to severe environmental conditions. It is suitable for popularization and application in urban and rural medium voltage distribution networks.

As a reliable electric power equipment company, we can offer kinds of related products for sale, if you have needs, please contact us.

The Main Cause of Vacuum Reduction of Vacuum Circuit Breaker(2022年11月21日)

gopower — 2022-11-03T16:32:54+0900

https://www.zhgopower.com/products/vacuum-circuit-breaker/
https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html
https://www.zhgopower.com/products/11kv-recloser-vacuum-circuit-breaker.html

Vacuum circuit breakers use the physical factors that eliminate arcs to continue so that arcs cannot be formed or sustained. The vacuum tube used in the vacuum circuit breaker maintains a certain degree of the vacuum so that when the dynamic and static contacts of the switch are breaking the load current, the arc cannot be generated or continued due to the absence or presence of a very little ionizable medium. The purpose of extinguishing the arc. However, the vacuum circuit breakers currently produced are not equipped with medium pressure blocking and other protections like the SF6 circuit breakers that are used more today, and there is no device for qualitative and quantitative monitoring of the vacuum degree characteristics. Therefore, the vacuum degree of the vacuum tube equipped with the circuit breaker is reduced in actual operation. It is impossible to be found in the fault, and the fault is recessive, and its danger is far greater than that of a dominant fault. Several reasons for the vacuum drop of the vacuum circuit breaker and the leakage of the vacuum tube are as follows.

1. The influence of the contact stroke of the vacuum circuit breaker

During installation or maintenance of the automatic circuit reclosers, the contact travel requirements in the product installation manual should be measured accurately, and the pull rod should be adjusted to prevent the travel from exceeding stroke and contact spacing. In actual operation, there are many accidents caused by improper adjustment of the overtravel of the circuit breaker, resulting in the rupture of the arc extinguishing chamber and the deformation of the conductive rod caused by the mechanical shock during the closing process of the circuit breaker. Choose 33kv auto recloser, recloser 24kv and 11kv auto reclosers.

2. The influence of the bounce of the vacuum circuit breaker

The contacts of vacuum circuit breakers are mostly flat butt-type structures, which inevitably produce different degrees of rebound phenomenon during the opening and closing operations. No matter the opening rebound or the closing rebound will bring harm to the operation: the bellows may undergo forced vibration and cracks may occur, causing the arc extinguishing chamber to leak air. The contact movement speed of the circuit breaker during opening and closing is relatively high, and the impact force at the end of the action is relatively high. If it is too large, it will cause bouncing, which may cause deformation of the contacts and conductive rods, and even cracks. If the vacuum circuit breaker connected to the capacitor bank has a closing bouncing, it will also cause damage to the capacitor.

3. The influence of vacuum circuit breaker opening and closing speed

The opening and closing speed of the circuit breaker plays a certain role in the arc extinguishing of the vacuum circuit breaker, and also determines the service life of the vacuum circuit breaker. Therefore, the opening and closing speed should be measured before the circuit breaker is put into operation so that some problems in product quality and debugging can be found in time. On the one hand, it prevents the opening and closing speed from being too large, and when the contact of the circuit breaker ends, the mechanical collision is violent, which makes the arc extinguishing chamber produce more serious vibrations.

4. The influence of vacuum circuit breaker buffer

The buffer stroke should be carefully checked, there should be no deformation damage or excessive compression, and a buffer allowance must be left. For some oil-filled buffers, the oil level of the buffer should be checked regularly, and the oil should be replenished in time.

5. The influence of vacuum circuit breaker operating mechanism capacity

In recent years, some circuit breakers have been equipped with a "permanent-magnet operating mechanism" for the operating mechanism modified to adapt to different installation spaces. Equipped with different types of operating mechanisms, during installation or transformation, attention should be paid to the operating distance of the operating transmission rod. If the capacity is too large, it will cause a serious impact on the arc extinguishing chamber, causing damage to the bellows of the vacuum interrupting chamber and directly affecting the vacuum. The service life of the circuit breaker makes the vacuum degree of the circuit breaker decrease faster.

Gopower is a professional electric power equipment company, we provide auto recloser, electrical control cabinet and etc. For more information, please feel free to contact us!

Vacuum Test Method for Vacuum Circuit Breakers(2022年11月18日)

gopower — 2022-11-03T16:32:16+0900

https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html
https://www.zhgopower.com/products/24kv-recloser-vacuum-circuit-breaker.html
https://www.zhgopower.com/products/vacuum-circuit-breaker/

The vacuum degree test of the vacuum circuit breaker is very important. Once the vacuum degree is destroyed, the arc cannot be extinguished, resulting in an explosion accident of the circuit breaker. The vacuum inspection test methods are as follows:

1. Appearance inspection method of vacuum circuit breaker

If the vacuum interrupter is a glass shell, it can be judged according to the color of the barium getter film coated on the inner wall. If the vacuum degree is good, the film is in a mirror state. When the vacuum degree of the vacuum circuit breakers is poor, it is milky white. This method is not very accurate, but it is worth having a check as a reference.

2. Power frequency withstand voltage method of vacuum circuit breaker

In the open state, the frequency test voltage is processed between the fractures, and the vacuum circuit breakers can withstand more than 60s under the power frequency withstand voltage, indicating that the vacuum degree of the vacuum circuit breaker is good. If in the process of voltage increase, the current also increases to over 5A, then it is considered to unqualified. Of course, the breakdown in the process of withstand voltage is not qualified. Choose 33kv auto recloser, 11kv auto recloser and 24kv vacuum circuit breaker.

3. Vacuum circuit breaker magnetron discharge method

Use a special testing instrument to measure, add one or several high-voltage pulses between the contacts, the pulse width is tens to hundreds of milliseconds, and a synchronous pulse current is passed through the magnetic field coil to generate the same pulsed magnetic field as the high-voltage and vacuum measurement. Relevant national rules stipulate that the vacuum degree reaches 0.066Pa as qualified, and when it is close to or lower than 0.6, it is unqualified and should be updated. When the vacuum degree drops significantly and fails to pass, the test cycle should be shortened, and whether to update or not should be decided according to the development situation.

4. Specific vacuum circuit breaker vacuum tester to measure

At present, due to the development of science and technology, various types of complete sets of measuring instruments have been manufactured for automatic circuit reclosers, and quantitative measurement without disassembly on site has been realized. With the means of quantitative measurement, it is not only possible to measure whether the vacuum degree of the vacuum switch is within the normal range, but more importantly, for some vacuum switches with a faster leakage rate, by comparing the measurement results over the years, it can be roughly inferred. , the real purpose of preventing accidents.

Zhuhai Gopower Smart Grid Co., LTD is a vacuum circuit breaker manufacturer in China, our products cover feeder terminal (FTU), station terminal (DTU), transformer terminal unit (TTU), column switch, fault indicator and background master station in 10kV distribution network lines software. And long-term cooperation with well-known domestic and foreign companies such as ABB, Gaoping Group, Daye Intelligence, TBEA, Shandong Electric, etc. We serve for State Grid Corporation, China Southern Power Grid Corporation and overseas markets.

What is the Role of SF6 Load Break Switch?(2022年11月15日)

gopower — 2022-11-03T16:31:38+0900

https://www.zhgopower.com/products/sf6-gas-load-break-switch/
https://www.zhgopower.com/products/11kv-sf6-gas-load-break-switch/
https://www.zhgopower.com/products/33kv-sf6-gas-load-break-switch.html

In daily life, we often see the figure of the SF6 load break switch, and its application greatly facilitates our life. So do you know what it does? If you don't know, you might as well follow the load switch manufacturer Gopower to find out.

1. The role of SF6 load break switch

(1) Opening and closing functions

Since the sf6 gas load break switch has a certain arc extinguishing ability, it can play the role of breaking and closing the load current, and at the same time, it can also break and close the rated current.

(2) Substitution effect

Because the SF6 outdoor pole load switch can be used in series with the current limiting fuse to replace the circuit breaker, it can often be used in the application of the circuit breaker. We have 11kv load break switch, 15kv load break switch, and 33kv load break switch.

(3) Main application of load switch

Because the SF6 outdoor column load switch is mainly used to break and close the load current, and it can be used in conjunction with the high-voltage fuse to replace the circuit breaker, its application range has been expanded.

2. Precautions for using SF6 load break switch

(1) When using the SF6 load break switch, make sure that it is installed correctly, and at the same time, the frame, closing mechanism, cable sheath, and protection device of the switch should also be well-grounded.

(2) When the SF6 load break switch is used in conjunction with the fuse, pay attention to the rationality of the combination of the two models to avoid various faults.

(3) Since the SF6 load circuit breaker has no arc extinguishing device, although it can isolate the power supply, it has an obvious disconnection point. It is necessary to pay attention to the normal connection temperature of the equipment during the process of use, and at the same time, the contact is good in the closed state. No-load opening and closing operation test to ensure normal use without abnormal conditions.

(4) When using the SF6 load break switch, it is necessary to do a good job of cleaning, regularly check for dirt, cracks, damage, leakage, and other problems, and pay attention not to wash with water.

To sum up, the SF6 load break switch has many functions, and the application occasions have also expanded. If you have any need, please feel free to consult us.

How to Install Vacuum Circuit Breakers?(2022年11月12日)

gopower — 2022-11-03T16:30:52+0900

https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html
https://www.zhgopower.com/products/11kv-sf6-gas-load-break-switch/
https://www.zhgopower.com/products/vacuum-circuit-breaker/

High-voltage vacuum circuit breakers have a good arc-extinguishing characteristic, which is suitable for frequent operation, and a long non-maintenance cycle. They have been widely used in urban and rural power grid transformation in the power industry, chemical industry, metallurgy, railway electrification, and mining. The vacuum circuit breaker has been generally praised by the user department.

1. Advantages of vacuum circuit breakers pole mounted auto recloser

The advantages of vacuum circuit breakers mainly refer to the vacuum interrupter, but its long period of no maintenance means no maintenance or maintenance-free. For the vacuum circuit breaker as a whole, the vacuum interrupter is only a component, such as the operating mechanism, transmission mechanism, insulating parts, etc., and is still an important part of ensuring the technical performance of the vacuum circuit breaker. For the normal maintenance of each component, it is very necessary to achieve the satisfactory use effect of the vacuum circuit breaker. Inquiry 33kv auto recloser, 24kv, 11kv auto recloser.

2. Installation requirements for vacuum circuit breakers pole mounted auto recloser

When the outdoor vacuum circuit breaker pole mounted recloser has not committed to the manufacturer, it is necessary to use the site for routine inspection, and blind self-confidence should be avoided as much as possible.

(1) Visual inspection and internal inspection of the vacuum circuit breaker should be carried out before installation. The vacuum interrupter, various parts, and components should be complete, qualified, non-destructive, and free of foreign matter.

(2) Strictly implement the requirements of the installation process regulations, and the specifications of the fasteners installed for each component must be selected by the design regulations.

(3) Check the distance between poles, and the distance between the upper and lower outlet lines must meet the requirements of relevant professional technical regulations.

(4) The tools and tools used must be clean and meet the assembly requirements. Tighten the screws near the arc extinguishing chamber, and do not use an adjustable wrench.

(5) The rotating and sliding parts should move freely, and grease should be applied to the friction parts.

(6) After the overall installation and commissioning of the outdoor vacuum circuit breaker is qualified, it should be cleaned and wiped clean. The adjustable connection parts of each component should be marked with red paint, and the connection of the outlet terminal should be smeared with anti-corrosion grease.

Gopower is a professional electric power equipment company, we provide auto recloser, electrical control cabinet and etc. For more information, please feel free to contact us!

Differences Between Load Break Switches and Circuit Breakers(2022年11月09日)

gopower — 2022-11-03T16:30:09+0900

https://www.zhgopower.com/products/pole-mounted-switch/
https://www.zhgopower.com/products/sf6-gas-load-break-switch/
https://www.zhgopower.com/products/vacuum-circuit-breaker/

1. Pole mounted load break switch

The load break interrupter switch has a simple arc extinguishing device, which can open and close the circuit with load, and has the function of self arc extinguishing. It can turn on and off a certain load current and overload current (working current), but cannot cut off short-circuit current (accident current). It must be used in series with a high-voltage fuse to cut off the short-circuit current. High voltage load break pole mounted switch are typically used to control power transformers.

2. Outdoor vcb breaker

The load break switch sf6 can turn on and off the circuit under load, and can quickly cut off the short-circuit current when the system has a short-circuit fault. That is to say, the circuit breaker can cut off the working current and the accident current, and it can also automatically cut off the short-circuit fault under the action of the protection device. Pole mounted recloser are mainly used in motors, large-capacity transformers and substations that frequently break loads.

3. The difference between load break switch and circuit breaker

(1) The circuit breaker can cut off the working current and the accident current, while the load circuit breaker can only cut off the working current but not the accident current. This is the main difference.

(2) To put it simply, circuit breakers are generally used in places that need to be disconnected frequently, and load-break switches are generally used in places where frequent disconnections are not required.

(3) Under certain conditions, the load break switch can replace the function of the circuit breaker, and the circuit breaker cannot replace the load break switch.

Zhuhai Gopower Smart Grid Co., LTD was established in 1998. It is one of the earliest high-tech companies engaged in the production of medium-voltage power transmission and distribution intelligent control equipment in China. It is one of the initiators and members of the Zhuhai Smart Grid Alliance. After 15 years of dedicated exploration and development, the company has grown into a leading enterprise in the field of intelligent power transmission and distribution in China. The company and Electric Gas have jointly participated in the construction of the world-renowned Olympic project in the transmission and distribution intelligent control project, mainly providing intelligent boundary load break switches and intelligent control systems to ensure stable power supply during the Olympics.

What is the Difference Between Pole Mounted Disconnect Switch, Load Break Switch and Vacuum Circuit Breakers?(2022年11月06日)

gopower — 2022-11-03T16:29:20+0900

https://www.zhgopower.com/products/pole-mounted-switch/
https://www.zhgopower.com/products/sf6-gas-load-break-switch/
https://www.zhgopower.com/products/vacuum-circuit-breaker/

Load Break Switch vs Disconnect Switch

The disconnect switch has no special arc extinguishing device, and its arc extinguishing ability is weak. The load switch is an on-off switch with a dedicated arc extinguishing contact, an arc extinguishing device and a spring circuit breaker. Vacuum circuit breakers have reliable arc extinguishing devices.

Pole Top Switches

Because disconnect switches lack a particular interrupting device and have a low interrupting capacity, they are often employed to isolate voltage and cannot connect or disconnect the load current. The principal purpose of pole mounted disconnect switch is to isolate the supply voltage when electrical equipment is shut down for maintenance, as well as to create an obvious separation point to protect the safety of maintenance people on the job.

Pole Mounted Load Break Switch

A load break switch sf6 combines a specific arcing contact, an arc extinguishing mechanism, and a spring-loaded circuit breaker into one device. A load break switch is structurally similar to a disconnector (both have apparent break points when detached), but it can also be used to open and stop circuits, much like a circuit breaker. A load break switch, on the other hand, can only open and close a load current or open and close an overload current, but a circuit breaker can control any circuit. As a result, it is only used to cut and tun on circuits under normal operating conditions, rather than to break short-circuit fault currents.

It must, however, be built to pass the short-circuit time fault current without causing damage. The load break switch's interrupters and contacts are designed to cut and connect the load current. In most circumstances, the load break switch should be used in conjunction with a high-voltage fuse, with the latter's job being to cut off the short-circuit fault current. Load break switches have a higher frequency of opening and closing, as well as a longer operating life, than circuit breakers.

The advantages of load break switch are less expensive and are typically used for distribution lines below 10kV. Air, pressurized air, SF6, and vacuum arc extinguishing are their arc extinguishing methods. The varieties and quality of load break switches have evolved and improved as science and technology has progressed. When the circuit is running properly, the load break switch contains a simple arc extinguishing device with limited arc extinguishing capability, which is utilized to connect or cut off the load current, but not to cut off significant short circuit currents when the circuit is served. After disconnection, the load break switch has a visible disconnection point, which is one of its characteristics.

Vacuum Circuit Breakers Pole Mounted Auto Recloser

When the circuit is running normally, the arc extinguishing capacity of a reliable arc extinguishing device is very strong, and it is used to connect or cut off the load current, and in the event of a fault in the circuit, pole mounted auto recloser is used to cut off the massive short-circuit current. According to the arc extinguishing medium, high-voltage circuit breakers can be classified as multi-oil arc extinguishing circuit breakers, oilless circuit breakers, vacuum circuit breakers, sulphur hexafluoride circuit breakers, and so on.

Gopower is a professional electric power equipment ltd, we provide auto recloser, electrical control cabinet and etc. For more information, please feel free to contact us!

What Are the Performance Requirements of the DC Power Distribution Box?(2022年11月03日)

gopower — 2022-11-03T16:28:39+0900

https://www.zhgopower.com/products/
https://www.zhgopower.com/products/11kv-sf6-gas-load-break-switch/

The DC power distribution box is an intermediate device between the rectifier, the battery and the DC load in the DC power supply system, and has the functions of circuit conversion, protection, control, measurement and sending out alarm signals.

1. The device should have access to two sets of batteries that are charged when the gadget is in use. The DC power distribution box should have a safeguard feature for the batteries when the DC current rating is larger than 400A, according to the requirements of use. The batteries are automatically disconnected when the battery voltage falls below the discharge termination voltage, and they are automatically or manually connected once the equipment's output voltage rises.

2. A secondary download option should be available on DC distribution panels for mobile communications. Before the battery is discharged to the average termination voltage after the AC power supply is interrupted, a portion of the secondary load is removed first, allowing the battery to supply the important load for an extended period of time, this is a process known as secondary download or secondary down power.

3. At rated load, the discharge circuit voltage in the DC power distribution box shall not excelled 0.5V.

4. Surge absorption devices should be installed at the output end of the DC power distribution box, as well as over-voltage and over-current protection devices.

5. The maximum monitoring error for the DC power distribution box output voltage is 0.5V.

6. A functioning grounding system and a safe grounding device should be installed in the DC power distribution box. Working grounding in a DC power distribution box is normally done with the positive pole; if the negative pole is utilized, special procedure must be followed. The metal shell of the distribution equipment and the DC power distribution box's protective grounding device between the grounding screws, there should be a secure electrical connection with a contact resistance of less than 0.1Ω.

7. The DC power distribution box must be able to work in parallel with similar-type equipment.

8. Telemetry and telecommunication. The following are examples of what a DC power distribution box can communicate and telemetry.

1) Telecommunications: DC output voltage is too high or excessively low, resulting in a fuse failure; the battery voltage is low, resulting in broken disconnect switch.

2) Telemetry: DC output voltage, total DC output current, charging and discharging current of the battery pack. The current of the main branch circuits can be telemetryed by the DC power distribution box as needed.

9. The DC power distribution box's output taps. The quantity and capacity of output taps should be set to satisfy the telecommunication equipment's requirements. The sum of the loads used simultaneously on the output taps must not exceed the distribution equipment's rated capacity. Protection devices are required for output taps with a capacity more than 630A, however protection device are not required for DC output taps with a capacity greater than 630A.

Gopower is a professional electric power equipment ltd, we provide auto recloser, electrical control cabinet, power electrical equipment, electrical power equipment, 11kv load break switch and etc. For more information, please feel free to contact us!

Function, Maintenance and Precautions of Outdoor VCB Breaker(2022年09月25日)

gopower — 2022-08-29T17:18:24+0900

https://www.zhgopower.com/function-maintenance-and-precautions-of-outdoor-vcb-breaker.html

Outdoor VCB function
Protect large silicon rectifier and other high voltage electrical equipment, such as 11kv outdoor circuit breaker and 24kv vacuum circuit breaker.

Inquiry China vacuum circuit breaker price from auto recloser manufacturer.

Gopower is a professional electric power equipment ltd, we provide auto recloser, scada remote terminal unit and etc. For more information, please feel free to contact us!

Daily Maintenance of Vacuum Circuit Breaker(2022年09月23日)

gopower — 2022-08-29T17:17:52+0900

https://www.zhgopower.com/daily-maintenance-of-vacuum-circuit-breaker.html

The vcb breaker maintenance methods of automatic circuit recloser or routine maintenance of it: how to ensure it is in good working state, clean pipe protection, replace rubber parts regularly and check the main components regularly. These ensure the normal operation of outdoor vacuum circuit breakers. In order to keep it in good working condition, the maintenance and management must be strengthened.

The following are the maintenance methods of the outdoor VCB vacuum circuit breaker provided by Gopower.

Inquiry China vacuum circuit breaker price from auto recloser manufacturer.

(2) The insulation strength of the supporting porcelain bottle and the arc extinguishing chamber are reduced, which results in surface discharge.

3. Check the main components of outdoor VCB vacuum circuit breaker regularly
(1) Arc extinguishing chamber
The state of the recovery spring of its main contact over range and moving contact should be regularly detected. Due to the mutual friction and frequent parting and closing, the dynamic and static contacts will wear, which results in the reduction of over range and contact pressure. When the over range is reduced to a certain extent, the dynamic and static contacts should be replaced. When the deformation of the moving contact recovery spring exceeds a certain limit, it must be replaced in time.

(2) Nonlinear resistance
Keeping the inside of the nonlinear resistance porcelain bottle clean and sealed. Replacing the desiccant in the vacuum load break switch nonlinear resistance porcelain bottle regularly. Checking the resistance value of the nonlinear resistance plate, and replacing it in time when the change of the resistance value exceeds a certain limit.

(3) Main valve
Checking the fit size between piston and valve body regularly. If the size does not meet the requirements, it should be replaced in time.

(4) Transmission air cylinder
To adjust the buffer of the transmission air cylinder properly. To ensure the disconnecting switch works well. Checking the matching accuracy between the piston of outdoor VCB breaker and cylinder block regularly. These ensure its good action performance by dressing or replacing parts.

(5) Ventilation plug door
The filler in the stopper must be replaced regularly, and the ventilation rate of the stopper must be tested. And adjusting it to the allowable range.

Working Principles of Sf6 Gas Load Break Switch(2022年09月20日)

gopower — 2022-08-29T17:17:20+0900

https://www.zhgopower.com/working-principles-of-sf6-gas-load-break-switch.html

11kv Lbs And 15kv Pole Mounted Disconnect Switch
Gopower has many types of medium voltages LBS load break switch, in which 11kv load break switch and 15kv load break switch are very popular in our board and overseas customer, welcome to get enquiry now!

Working Principle and Advantages and Disadvantages of VCB Breaker(2022年09月18日)

gopower — 2022-08-29T17:16:38+0900

https://www.zhgopower.com/working-principle-and-advantages-and-disadvantages-of-vcb-breaker.html

VCB breaker working principle
Circuit breaker, also known as air switch, automatic circuit recloser. When the working current exceeds the rated current or short circuit and voltage loss occurs, the auto circuit recloser circuit will be automatically cut off. Compared with other circuit breakers, VCB vacuum circuit breakers are only different in arc extinguishing medium. There is no conductive medium in a vacuum, which makes the arc extinguish quickly, so the distance between the moving and stationary contacts of the circuit breaker is very small. The VCB breaker uses the plasma to rapidly diffuse and extinguish the arc when the current in high vacuum flows through the zero point, so according to VCB working principle, as to complete the purpose of cutting off the current. Inquiry China vacuum circuit breaker price from auto recloser manufacturer.

Advantages of VCB pole mounted auto recloser
1. The arc of VCB circuit breaker is extinguished in the sealed container, and the arc and hot gas are not exposed;

2. The contact gap is very small, only a few mm to 40 mm.

3. Short arcing time, low arcing voltage, small arcing energy, less contact wear and more allowable breaking times. We have 11kv VCB breaker and 24kv vacuum circuit breaker.

4. The inertia of the moving conducting pole is small and suitable for frequent operation;

5. Simple structure, small volume and light weight;

6. Low noise during operation;

7. There is no oil, so there is no danger of fire and explosion;

Advantages and disadvantages of vacuum circuit breaker
1. It is easy to produce switching overvoltage. When the inductive current is cut off, the current will be cut off, resulting in higher overvoltage. Therefore, an overvoltage absorption device should be installed.

2. It is difficult to monitor the vacuum degree during operation;

3. The composite insulator is easy to accumulates dust in the operation of a thermal power plant, so the environment of the auxiliary power room should be relatively clean.

Gopower is a professional electric power equipment company, we provide auto recloser, load break switch and etc. For vacuum circuit breaker operation and working principle of vcb, please feel free to contact us!

VCB Pole Mounted Recloser(2022年09月15日)

gopower — 2022-08-29T17:15:59+0900

https://www.zhgopower.com/products/vacuum-circuit-breaker/

ZW32 series auto circuit recloser, produced by Gopower auto recloser manufacturer, are used in distribution systems. Auto distribution line circuit reclosers are used to make and break normal and fault currents. VCB pole mounted auto reclosers are fully equipped with sensors and a controller to provide protection and control. In case of a line fault, automatic circuit reclosers can break and make currents several times, thus avoiding longer network interruptions due to temporary faults.

As a vacuum circuit breaker automatic recloser manufacturer, we manufacture, design, and test the pole mounted vacuum circuit breaker based on current standards IEC 62271-100. Gopower, which is the standard for China VCB circuit breaker manufacturer to produce qualified vacuum circuit recloser and offer satisfying services for the customers. If you want to buy a automatic recloser circuit breaker, please contact us, because our electrical recloser circuit breaker price is competitive in the recent market.

Recloser Types
Outdoor automatic line recloser circuit breaker is an indoor power distribution 3 phase recloser in 11kv, 24kv, 33kv, normal 24kv vacuum circuit breaker can be used for the protection and control of electrical equipment in industrial and mining enterprises, power plants and substations. The outdoor automatic recloser circuit breaker is especially suitable for places requiring no oil, less maintenance and frequent operation. The vacuum type recloser circuit breaker as pole mounted disconnect switch can be configured in central cabinet, double-layer cabinet and fixed cabinet as control and protection of high-voltage electrical equipment.

As an electric power equipment company, we can offer types of VCB auto recloser circuit breakers, such as 11kv auto reclosers, 33kv automatic circuit recloser, etc.

Advantages of VCB Vacuum Circuit Recloser
Pole mounted auto recloser is named because its arc extinguishing medium and insulating medium of contact gap after arc extinguishing is high vacuum. Pole mounted recloser has the advantages of small volume, lightweight, suitable for frequent operation and arc extinguishing without maintenance. Vacuum type circuit breaker is widely used in a distribution network.

Auto Recloser Working Principle
High power recloser, referred to as recloser pole, is a high-voltage switchgear with its own control and protection functions. Automatic circuit recloser can automatically detect the current passing through the main circuit of the recloser, automatically disconnect the fault current according to the inverse time limit protection in case of fault, and reclose multiple times according to the predetermined delay and sequence.

Gopower is a professional electric power equipment company, we provide auto recloser, electrical control box and etc. For 33kv auto recloser price or more information, please feel free to contact us!

SCADA Remote Terminal Unit RTU(2022年09月10日)

gopower — 2022-08-29T17:15:16+0900

https://www.zhgopower.com/products/remote-terminal-unit-rtu/

BD-163 distribution automation master terminal unit in SCADA RTU is a new generation of China power distribution box based on the latest generation of automated remote terminal technology from China SCADA RTU manufacturers. The remote terminal unit RTU like our MCC cabinets electrical is the eyes and limbs of the power distribution automation system. The operating status of RTU in SCADA system is related to the data reliability, performance accuracy and operational safety of the power distribution automation. When the configuration is correct and the operation is normal, the SCADA RTU system realizes the correct operation of switches, rapid fault isolation and power restoration, thereby improving power supply reliability.

Technical parameters of Remote Terminal Unit-RTU

Features of Remote Terminal Unit SCADA

Remote terminal unit rtu With "communication", the SCADA RTU system has a "remote maintenance" function.

Flexible configuration, all protection functions have a separate retreat.

The RTU for SCADA system has a complete self-checking function to detect the working conditions of each part online.

The closing and closing circuit adopts an anti-misoperation design and has an anti-missing function.

Applicable to analog acquisition, state quantity acquisition, local and remote control switch closing of 4-12 switch.

24 channels can be controlled by expansion.

By selecting different configurations, remote terminal unit can meet the needs of “Three Remote” and “Two Remote” of the State Grid and South Grid.

Meet the special requirements of all parts of the country (such as Shandong, Beijing, Guangdong, etc.)

Zero-sequence current setting adaptive function, no manual setting required.

Meet the specific requirements of “one or two integration".

The core RTU unit can be flexibly configured to shade vertical, shaded horizontal, outdoor vertical, an d group screen.

Function of RTU in SCADA System
Distribution Terminal Unit-DTU installation location: indoor and outdoor opening and closing station, power distribution room, knife lock chamber, box change, switch, it can detect line fault and overload status function, and can detect line zero sequence overvoltage, zero sequence overcurrent, line overload, line overcurrent, phase-to-phase short circuit protection, etc. It can be flexibly set to alarm and trip action. And record the fault event.

The main functions of the scada remote terminal unit system are

RTU unit realize comprehensive coverage and monitoring of the operating conditions of power distribution terminals, and quickly retrieve and locate each terminal through the terminal list column;

What is RTU in SCADA
Different from the and feeder remote terminal unit, the remote operation and maintenance system of the remote terminal unit in SCADA, Remote terminal unit RTU is composed of a communication management server, a Web server, network security protection equipment, and a maintenance workstation: the communication management server is used to provide direct communication with remote terminals and collect status information and parameter information of each rtu remote terminal unit. The data gathered by remote terminal unit in SCADA is forwarded to the web server according to the data requested by the web server, and the remote terminal unit SCADA parameter setting command issued by the webserver is forwarded to the terminal; the web data server is used to provide a high-performance network service to provide users with browsing and modifying remote terminal unit RTU parameters and status. The interface also displays terminal real-time letter and wish data, and realizes various functions of human-computer interaction.

Feeder remote terminal unit RTU is generally not restricted by the geographical environment and can be installed near the outdoor on-site measurement point.

The RTU SCADA communication function is powerful. It will finally transmit the collected analog, switch, and digital information to the dispatch center, and the dispatch center is sometimes thousands of miles away, it is required to have a remote communication function. Although PLC also has a communication function, it is limited to the short-distance transmission of data within the plant station, and its communication function is slightly inferior to that of RTU.

Gopower is a professional electric power equipment ltd, we provide auto recloser, feeder terminal and etc. For more information, please feel free to contact us!

Pole Mounted Switch(2022年09月05日)

gopower — 2022-08-29T17:14:40+0900

https://www.zhgopower.com/products/pole-mounted-switch/

The pole mounted disconnect switch is a kind of safety switch used on the electric pole to ensure the safety of electricity. Pole top switch's main function is to isolate the high voltage of the circuit. According to the arcing capacity of the contact, Gopower pole mounted switch can be divided into pole top recloser & load brake switch. Besides, SF6 gas load break switch(SF6 LBS) including load break switch 11kv and 15 kv pole mounted disconnect switch,24kv and 33kv LBS.

Types of Pole Mounted Switch

There are many types of load break disconnect pole top switch, including SF6 Gas Load Break Switch and Vacuum Circuit Breaker. We offer different specifications of SF6 Gas Load Break Switch, such as 11kv load break switch, 15kv load break switch, 33kv load break switch, etc. Vacuum Circuit Breakers also have various specifications, including 11kv outdoor circuit breaker, 24kv vacuum circuit breaker, 33kv automatic circuit recloser and so on. If you want to buy pole mounted load break disconnect switch, please send your demands to us.

How Does a Load Break Switch Work

What's more, the relevant parts of the switch can be used to set other fractures, such as setting for the line, and the port for managing the circuit fracture can be opened and closed at the same time. Therefore, they can meet the needs of circuit maintenance or reorganization in different states.

Gopower is a professional electric power equipment company, we provide auto recloser, electrical control cabinet and etc. For more information, please feel free to contact us!

Distributed Type DTU(2022年09月01日)

gopower — 2022-08-29T17:10:49+0900

https://www.zhgopower.com/products/distribution-type-dtu.html

The distributed DTU power distribution terminal is suitable for the protection, measurement and control, and communication of the interval unit of the ring network cabinet with a voltage level of 10kV and below. Equipped with complete protection, measurement, control and communication monitoring functions, the mcc main control cabinet electrical cooperates with circuit breakers, load switches and other switches to provide protection for lines and feeder lines of 10kV and below, using complete protection functions to quickly isolate and isolate fault areas and reduce power outages Range, rapid restoration of power supply, and a strong guarantee for the safe and stable operation of the distribution network system.

Features of Distribution Automation Terminal
Distributed structure, it composed by several interval units and public units.

The software platform adopts the powerful Linux operating system of real-time multi-tasking and multi-threading.

Miniaturization, each unit of the terminal adopts a small structure, and the structure is small and convenient for mass production and mass testing

The installation is simplified, and the terminal adopts a unified and easy-to-plug interface, suitable for installation and replacement

Large size LCD screen with 160*160 resolution, terminal operating conditions can be seen at a glance

It does not depend on the global information of the master station or the sub-station

Fast processing and reliable action

When the operation mode of the distribution line changes, the logic is adaptive.

No need to reclose multiple times, reducing the impact on the equipment.

Gopower is a professional electric power equipment company, we provide auto recloser, electrical control box, mcc electrical cabinets, mcc cabinets electrical and etc.

Function of Vacuum Circuit Breaker in Power System(2022年05月23日)

gopower — 2022-04-28T15:05:55+0900

https://www.zhgopower.com/products/vacuum-circuit-breaker/

https://www.zhgopower.com/products/11kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html

Vacuum circuit breaker has the characteristics of low arc extinguishing voltage, strong arc extinguishing ability and fast breaking speed. The mechanism of overvoltage generation includes cut-off overvoltage, multiple reignition overvoltage, simultaneous breaking overvoltage, etc. Vacuum circuit breaker has the characteristics of low arc extinguishing voltage, strong arc extinguishing ability, fast breaking speed, large breaking capacity, long service life, adaptability to frequent operation and so on. It has been widely used in electric power, metallurgy, chemical industry and other fields. However, the vacuum circuit breaker will produce overvoltage in the process of breaking. If it is not used properly in operation, it will also cause accidents such as circuit breaker explosion, which will have a significant impact on safety production.

The arc extinguishing medium of VCB pole mounted auto recloser and the insulation medium of contact gap after arc extinguishing are high vacuum. Vacuum circuit breaker is the main switchgear in power system. Vacuum circuit breaker is named because its arc extinguishing medium and the insulating medium of contact gap after arc extinguishing are high vacuum; It has the advantages of small volume, light weight, suitable for frequent operation and arc extinguishing without maintenance. It is widely used in distribution network.

1. The meaning of Vacuum in Outdoor VCB Circuit Recloser
There are many kinds of circuit breakers: multi oil circuit breaker, low oil circuit breaker, sulfur hexafluoride circuit breaker, compressed air circuit breaker and vacuum circuit breaker. These are named after the arc extinguishing medium. The nature of the arc extinguishing medium determines the arc extinguishing ability. The vacuum circuit breaker has strong arc extinguishing ability and can extinguish the arc quickly. But in fact, it is not a vacuum. It will deliberately add some air to it for the sake of safety. This is just a naming method of circuit breaker. We need to understand the principle.

2. Function of Outdoor VCB Circuit Recloser in Power System
When the power system operates normally, the vacuum circuit breaker can cut off and connect the no-load and load current of lines and various electrical equipment; When the power system fails, the vacuum circuit breaker cooperates with the relay protection to quickly cut off the fault current and prevent the expansion of the accident scope.

Gopower outdoor VCB circuit breaker is 11, 24, 33kv, 50Hz, normal indoor distribution three-phase recloser and 24kv vacuum circuit breaker. It can be used for the protection and control of electrical equipment in industrial and mining enterprises, power plants and substations. Outdoor vacuum circuit breaker is especially suitable for places without oil, less maintenance and frequent operation. The vacuum circuit breaker switch can be configured in the central cabinet, double-layer cabinet and fixed cabinet as the control and protection of high-voltage electrical equipment. As a power equipment company, we provide various types of vacuum circuit breakers, such as 11kv vacuum circuit breaker, 33kv outdoor circuit breaker, etc.

Gopower is a professional electric power equipment ltd, we provide auto recloser, feeder terminal and etc. For more information, please feel free to contact us!

The Difference Between SF6 Circuit Breaker and SF6 Load Break Switch(2022年05月16日)

gopower — 2022-04-28T14:51:48+0900

https://www.zhgopower.com/products/vacuum-circuit-breaker/

https://www.zhgopower.com/products/11kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/24kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/pole-mounted-switch/

https://www.zhgopower.com/products/11kv-sf6-gas-load-break-switch/

https://www.zhgopower.com/products/15kv-sf6-gas-load-break-switch/

1. Introduction of sf6 load break switch and sf6 circuit breaker
(1) SF6 circuit breaker auto circuit recloser
Sulfur hexafluoride circuit breaker is a circuit breaker that uses sulfur hexafluoride (SF6) gas as arc extinguishing medium and insulating medium, referred to as SF6 circuit breaker. The use of sulfur hexafluoride as an arc extinguishing medium in circuit breakers began in the early 1950s. Due to the excellent characteristics of this gas, the single-break of this automatic circuit recloser is much higher than the compressed air circuit breaker and the oil-less circuit breaker in terms of voltage and current parameters, and does not require high air pressure and a considerable number of series-connected breaks.

(2) sf6 load break switch
sf6 load break switch is an excellent load switch experienced by many users in recent years. In addition to the long electrical life and strong breaking force, it has the same advantages as the vacuum load switch. Its outstanding advantage is that it is easy to realize three working positions (on, off and ground), small current (inductance, capacitor) breaking, strong resistance to harsh environmental conditions. It is suitable for promotion and application in urban and rural medium-voltage distribution networks. The load switch is a switching appliance with a simple arc extinguishing device. The load switch using SF6 gas as the insulation and arc extinguishing medium is called sf6 load break switch, which can be used as a closing and breaking load current. It can also be used for closing and breaking no-load lines, no-load transformers and capacitor banks, etc. All three-position load switches with on, off and grounding functions have simple structure and low price. Only the load switch cannot disconnect the short-circuit current. We have 11kv vacuum circuit breaker, 24kv vacuum circuit breaker and 33kv auto recloser.

2. The difference between sf6 circuit breaker and sf6 load break switch
(1) Structure

sf6 circuit breaker: sf6 circuit breaker is a sulfur hexafluoride circuit breaker, and the structure of sf6 circuit breaker is mainly a porcelain column structure and a tank structure.

sf6 pole mounted load break switch: the structure of sf6 load break switch is mainly arc extinguishing device, using sf6 gas as insulation and arc extinguishing medium.

(2) Application

sf6 circuit breaker: sf6 circuit breaker is mainly used in ultra-high voltage large-capacity power systems.

sf6 LBS pole mounted switch: sf6 load break switch has a larger application scenario, one is used as a closing and breaking load current and overload current. The other is for closing and breaking no-load lines, no-load transformers and capacitor banks.

(3) Features

sf6 circuit breaker: sf6 circuit breaker has the characteristics of blocking effect, long electrical life, high insulation level, good sealing performance, smooth buffering and low operating power.

sf6 LBS pole mounted load break switch: sf6 load break switch has the characteristics of long electrical life, strong breaking force, three working positions, small current breaking and strong resistance to harsh environmental conditions. Gopower manufacturer high quality 11kv lbs, 15kv load break switch.

The above is the difference between sf6 load break switch and sf6 circuit breaker. Hope this will be helpful to you. If you have any other questions about our products, please contact our official customer service!

Gopower is a professional electric power equipment company, we provide auto recloser, load break switch and etc. For more information, please feel free to contact us!

Advantages of Automatic Circuit Recloser in Power System(2022年05月10日)

gopower — 2022-04-28T14:40:37+0900

https://www.zhgopower.com/products/11kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/24kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/vacuum-circuit-breaker/

After the power supply is disconnected by the protection action, the arc at the fault point is automatically extinguished, the insulation strength is restored, and the fault is eliminated by itself. If the circuit breaker is closed again, the normal power supply can be restored. It is mainly caused by the scattering of the insulator surface caused by lightning, the discharge of the line to the branches, the short-term contact with the line caused by strong wind, and the short circuit caused by the discharge through the body of a bird. This type of failure accounts for more than 80% to 90% of the total number of failures.

After the power supply of the fault line is disconnected, the insulation strength of the fault point cannot be restored, and the fault still exists. Even if the circuit breaker is closed again, it will be disconnected again by the relay protection device such as inverted pole, broken wire, insulator breakdown or damage and so on.

An automatic device that automatically re-inserts a circuit breaker that has been tripped by an abnormal operation. After the line adopts automatic circuit recloser, if there is a transient fault, after the protection action removes the fault, the reclosing action can be successful and the power supply of the line can be restored. For a permanent fault, after the reclosing action, the protection will act again, the circuit breaker will trip, and the reclosing will not be success. The advantages of using automatic 11kv auto reclosers, 24kv vacuum circuit breaker and 33kv vcb breaker on transmission lines are as follows.

1. The automatic circuit recloser improves the reliability of the power supply of the transmission line and reduces the loss caused by the instantaneous fault and power outage.

2. For high-voltage transmission lines with double-ended power supply, the automatic circuit recloser can improve the stability of the parallel operation of the system, thereby increasing the transmission capacity of the line.

3. The automatic circuit recloser can correct the erroneous trip caused by the faulty circuit breaker itself or the malfunction of the relay protection.

The regulations stipulate that overhead lines and cables and overhead mixed lines of 1kV and above, under the condition of a circuit breaker, if electrical equipment allows and no standby power is automatically turned on, automatic reclosing shall be installed. Bypass circuit breakers and automatic reclosing should be installed for the bus circuit breaker or section circuit breaker that also serves as a bypass. The step-down transformer on the low-voltage side without power supply should be equipped with automatic reclosing. If it is necessary, the bus can adopt automatic reclosing.

After the automatic circuit recloser is adopted, it will have an adverse effect on the system. When the reclosing is in a permanent fault, the system will be impacted by the short-circuit current again, which may cause the system to oscillate. At the same time, the circuit breaker cuts off the breaking current twice in a short period of time, deteriorating the working conditions of the circuit breaker. Therefore, the use of automatic circuit reclosers is sometimes restricted by system and equipment conditions.

The automatic circuit recloser is mainly used for overhead lines. For cable lines, because of its low probability of failure, even if a failure occurs, the insulation is often permanently damaged, so automatic reclosing is not used.

Gopower is a professional electric power equipment company, we provide auto recloser, electrical control box and etc. For more information, please feel free to contact us!

Basic Requirements for Automatic Circuit Recloser(2022年05月09日)

gopower — 2022-04-28T12:58:43+0900

https://www.zhgopower.com/products/vacuum-circuit-breaker/

https://www.zhgopower.com/products/11kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/24kv-vacuum-circuit-breaker.html

Ⅰ. The number of actions of the automatic circuit recloser

The number of actions of the automatic circuit recloser should meet the pre-determined. For example, a three-phase reclosing device should only act once. When the reclosing device trips again after a permanent fault, it should not run again. In any case, such as damage to the components of the device itself, sticking of the relay contacts or refusal to move, the reclosing should not cause the circuit breaker to repeatedly reclose to a permanent fault.

Ⅱ. The reset method of the automatic circuit recloser

After the reclosing device is activated, it should be able to automatically reset and be ready for the next action. However, for lines with voltages of 10kV and below, if there are local personnel on duty, manual resetting can also be used to simplify reclosing. The disadvantage of using manual reset is that after the reclosing action, the automatic circuit recloser will refuse to act before the on-duty personnel does not reset in time, and another failure occurs. This is especially likely to happen in the thunderstorm season, where there are more lightning activities.

Ⅲ. Action time of automatic circuit recloser

The action time of reclosing is generally 0.5~1.5s. The reclosure time should be as short as possible to shorten the power outage time. Because the speed of the motor drops sharply after the power supply is interrupted, when the reclose is successful, the motor should start automatically. The lower the speed, the greater the self-starting current and the longer the time. This often causes the grid voltage to drop too much, making self-starting more difficult and delaying recovery. Normal working time. However, the reclosing time should not be too short. The time should be longer than the time for the insulating medium to dissociate, so that the insulation strength of the fault point can be restored in time, and the operating mechanism of the circuit breaker should be restored in time to be able to reclose, such as an oil circuit breaker. To make the insulation strength around the contacts have time to recover, the arc extinguishing chamber has time to be filled with oil.

Ⅳ. Coordination of automatic circuit recloser and relay protection

There should be an outdoor VCB automatic recloser that accelerates the protection action before or after reclosing, so as to better cooperate with the protection device and accelerate the removal of the fault. The pre-acceleration protection of the automatic circuit recloser is referred to as pre-acceleration, that is, when a fault occurs on the line, the fault is removed by the instantaneous action of the protection for the first time, and then the reclose is performed. If the reclose is on a permanent fault, there are options according to the protection configuration Jumped away. The front acceleration protection is mainly used in the direct wiring route from power plants or important substations below 35kV, such as 11kv outdoor circuit breaker, 33kv automatic circuit recloser and 24kv vacuum circuit breaker to quickly remove faults and ensure the bus voltage.

The post-acceleration protection of the automatic circuit recloser is called post-acceleration for short. When the line fails for the first time, the protection has a selective action and then recloses. If the reclose is on a permanent fault, the protection action is accelerated after the circuit breaker is closed. Instantaneous removal of the fault. Post-acceleration protection is mainly used in networks above 35kV and transmission lines that supply power to important loads. If the automatic circuit recloser acceleration mode is adopted, the inrush current generated at the moment of closing and the zero sequence and negative sequence current generated by the three-phase contacts of the circuit breaker not closing at the same time may cause the protection to malfunction, and measures should be taken to prevent it.

Gopower is a professional electric power equipment ltd, we provide auto recloser, electrical control cabinet and etc. For more information, please feel free to contact us!

Measures to Prevent Incorrect Operation of Vacuum Circuit Breakers(2022年05月06日)

gopower — 2022-04-28T12:15:55+0900

https://www.zhgopower.com/products/vacuum-circuit-breaker/

https://www.zhgopower.com/products/11kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/24kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html

The vacuum circuit breaker has fast breaking speed, strong de-ionization, and is not easy to form arc reignition. It not only effectively limits the overvoltage in system operation, but also the moving and static contacts are not easily burned by the arc, and there will be no leakage of other media. Therefore, the maintenance is easy and its service life is long. These are the advantages that the low-oil circuit breaker doesn’t have. However, at present, accidents of the vacuum circuit breaker opening and closing knife-switch with load happen frequently, which causes the whole circuit breaker to burn out, resulting in shutdown, power outage and even serious consequences of personnel burns.

Ⅰ. Reasons for accidents of vacuum circuit breaker opening and closing knife-switch with load

1. When operating the vacuum circuit breaker, the operator still uses the method of operating the low oil circuit breaker. The handle of the low oil circuit breaker cart is lifted up at the lowest position of the panel to immediately open the knife-switch, and the cart handle is not raised to a higher than horizontal position or equal to the horizontal position. At this time the circuit breaker is still in the closed state and then pushed into the operating position.

2. The time for the auxiliary machines in the power plant to switch to hot standby is generally 1:00 to 5:00 in the morning. At this time, the operators are not in good spirits, and the opening and closing indicators are not carefully checked. Or the indicators are unclear. It was mistakenly determined that the circuit breaker pole mounted recloser in the inspection position must be in the open state, and it was pushed into the operating position naturally.

3. The horizontal position of the handle of the vacuum circuit breaker cart is relatively high. The horizontal position of the handle corresponds to the switch opening position, so that the operator who is slightly shorter does not lift the handle to the horizontal position and mistakes it for the horizontal position, and the switch has been tripped open.

4. The circuit breaker itself lacks technical measures to prevent from opening and closing the knife-switch with load, and the manufacturer did not manufacture this type of circuit breaker in accordance with the requirements of the five preventions.

5. For different voltage automatic circuit recloser, opening and closing mistakes may be caused by multiple reasons. You can check the following links for more informations. 11kv auto recloser, 24kv vacuum circuit breaker and 33kv auto recloser.

Ⅱ. Measures to prevent misoperation of vacuum circuit breakers

1. Install a brake device on the hand-carried vacuum circuit breaker. When the circuit breaker is closed, the moving mechanism of the circuit breaker is blocked so that the circuit breaker cannot move when the circuit breaker is closed. When the circuit breaker is in the inspection position, if it is in the closed state, it cannot be pushed into the running position.

2. Improve the push-pull handle of the circuit breaker to ensure that the circuit breaker will trip reliably as long as the circuit breaker handle is lifted.

3.Add a miniature alarm device the size of a mobile phone to the handcart type vacuum circuit breaker that has been put into operation.
4.
Specific method: Introduce a normally open auxiliary contact of the vacuum circuit breaker into a microphone jack on the circuit breaker panel. When the operator operates the switch, first insert the alarm plug into the jack, and the alarm immediately emits a sharp voice or the voice prompt of switch closed, operation prohibited so as to remind the operator to disconnect the circuit breaker first, and then operate.

If the normally closed contact circuit breaker is in the open state, after the alarm plug is inserted into the jack, an audible prompt will sound that switch opened, operation allowed. If the vacuum circuit breaker is in the closed position, when the alarm plug is inserted into the jack, there is no sound, and no operation is allowed at this time. In this way, a safety line of defense is added to prevent misoperation, and it is a simple technical measure to prevent accidental opening and closing of the breaker.

Gopower is a professional electric power equipment company, we provide auto recloser, electrical control box and etc.

The Generating Mechanism and Precautions of Vacuum Circuit Breaker Operating Overvoltage(2022年05月05日)

gopower — 2022-04-28T12:00:39+0900

https://www.zhgopower.com/products/vacuum-circuit-breaker/

https://www.zhgopower.com/products/11kv-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/33kv-recloser-vacuum-circuit-breaker.html

https://www.zhgopower.com/products/24kv-vacuum-circuit-breaker.html

Vacuum circuit breakers have the characteristics of low arc extinguishing voltage, strong arc extinguishing ability, fast breaking speed, large breaking capacity, long service life, and frequent operation. It has been widely used in many fields such as electric power, metallurgy and chemical industry. However, the vacuum circuit breaker will generate over-voltage during the breaking process. If it is used improperly during operation, it will also cause accidents such as the circuit breaker explosion, which will have a major impact on safety production.

Ⅰ. The mechanism of over-voltage of VCB breaker recloser types
1. Current cut-off over-voltage

When the vacuum circuit breaker is used to open and break the load equipment, it will extinguish the arc before the current crosses zero, resulting in a current cut-off phenomenon, namely di/dt→, so the load equipment will induce the corresponding current cut-off over-voltage, that is, the amplitude is related to the cut-off level and load characteristics of the circuit breaker. Under the same load, the lower the current cut-off value of the circuit breaker, the smaller the over-voltage amplitude.

2. Multiple reignition over-voltage

When the vacuum circuit breaker pole mounted recloser breaks the electrical load, the contact of the arc extinguishing chamber separates the arc when the power frequency current crosses zero. Due to the small contact distance of the circuit breaker, reignition will occur under the action of the recovery voltage. For electrical loads, there is an L-C circuit, and the reignition of the arc will cause a high-frequency current in the circuit. When the high-frequency current crosses zero, the arc will be extinguished again. Due to the small contact opening distance, new oscillations will occur, which will break down the contact gap again and cause the arc to reignite multiple times. In this way, a high voltage will appear in the loop, and its over-voltage amplitude will increase as the number of reignitions increases. This kind of reignition may be repeated many times during the breaking process, and its over-voltage value will be higher.

In fact, the over-voltage value is limited by the instantaneous operating conditions of the circuit breaker, but its voltage amplitude is also about 4 times the phase voltage, which will cause harm to the insulation of the electrical load.

3. Over-voltage because of breaking at the same time

When the vacuum circuit breaker is used to break the motor circuit, due to the current cut-off phenomenon of the circuit breaker, and the mutual inductance and capacitance in the motor circuit, it will cause the reignition of the arc and high-frequency oscillation. When the first phase is disconnected, the high-frequency current will be coupled to the second and third phases through mutual inductance and capacitance between the phases and superimposed with the original high-frequency current to form a three-phase current that crosses zero at the same time. When the arc of the first phase is extinguished, the arcs of the second and third phases are forced to be cut off, resulting in a higher over-voltage.

Our pole mounted auto recloser has the following auto circuit recloser: 11kv auto recloser, 33kv automatic circuit recloser and 24kv vacuum circuit breaker.

Ⅱ. Precautions for over-voltage of VCB breaker recloser types
1. Use a circuit breaker with a lower cut-off value

Since the current cut-off over-voltage of the pole mounted recloser is related to the cut-off value of the circuit breaker, the smaller the cut-off value, the smaller the over-voltage amplitude. The cut-off value of the circuit breaker is related to the material of the circuit breaker's contact.

Therefore, special attention should be paid to the selection of suitable contact materials when designing and selecting the circuit breaker, so as to reduce the cut-off value of the circuit breaker and reduce the cut-off over-voltage. At present, most of the contact materials of the arc extinguishing chamber are copper-chromium alloy, and the cut-off value is about 1 A.

2. Use R-C resistance-capacitance loop absorption device

The multiple reignition over-voltages of vacuum circuit breakers auto circuit recloser are related to the presence of L-C oscillations in the load circuit and the occurrence of high-frequency currents. Therefore, the use of R-C resistance-capacitance circuits can effectively limit over-voltages. The R-C circuit can not only limit the amplitude of the cut-off over-voltage, but also reduce the rising steepness of multiple reignition over-voltages. The device is composed of resistors and capacitors.

The function of the resistor R is to increase the attenuation coefficient and consume high-frequency oscillation energy, and the function of the capacitor C is to limit the steepness of the over-voltage wave head. But the use of R-C resistance-capacitance circuit can not completely absorb the energy generated by over-voltage.

3. Use over-voltage protector

Over-voltage protector can better limit over-voltage. Currently, zinc oxide arresters are commonly used as over-voltage protectors. However, zinc oxide arresters still have some problems for low-current grounding systems: first, the operating voltage is low. Secondly, they cannot withstand intermittent over-voltage and harmonic over-voltage. Thirdly, they cannot give full play to the advantages of zinc oxide arresters.

When the zinc oxide arrester is used in the motor circuit, because it is connected between the phase and the ground, its protection range is the over-voltage between the phase and the ground. The over-voltage of the motor circuit exists between phases, so it cannot protect the motor insulation well.

Gopower is a professional electric power equipment company, we provide auto recloser, electrical control box and etc.

How to Design Tripping Mechanism of Vacuum Circuit Breaker?(2022年03月22日)

gopower — 2022-03-01T17:45:17+0900

https://www.zhgopower.com/how-to-design-tripping-mechanism-of-vacuum-circuit-breaker.html

For the design of the tripping mechanism of the outdoor VCB vacuum circuit breaker, the first step is to choose the type of mechanism, and then determine the size of the buckling surface, calculate tripping power and tripping torque of the mechanism to design the tripping drive device.

1. Mechanism type of the outdoor VCB vacuum circuit breaker
It is mainly determined by the overall layout of the whole outdoor VCB breaker mechanism and the allowable space size, and the tripping mechanism should be placed in the link with less force as much as possible. When choosing the mechanism, the stability of the buckle and the size of the tripping force, as well as the tripping work must also be considered. Based on the comparison of several tripping mechanisms, the toggle tripping mechanism is suitable for occasions with large buckling force, high buckling stability and strong tripping device.

The two buckle structure parts of the hook-type tripping mechanism are separated. Therefore, the position of the impact point should be paid attention to in the design, especially for the tripping mechanism and the hook mechanism of the flat buckle. If the force acting in the direction of buckling is in the direction of tripping the ballast, the buckle will fail and unstable factors will be generated. Therefore, the manufacturing error has a greater impact on the stability of the buckle.

2. The buckle surface size of the pole mounted recloser
For the hook mechanism, the stability of the buckle also affects the tripping work. In terms of the stability of the buckle, the acting torque on the buckle node should be the torque to prevent tripping, and it is better if it is larger. However, power line recloser increases the tripping work. In terms of reducing the tripping work, the tripping stroke should be reduced. The smaller the length of the buckle surface, the better. The manufacturing error is the main factor affecting the size.

3. Calculation of tripping drive device of the outdoor VCB vacuum circuit breaker
Based on the calculated dynamic characteristics and the required trip time, the output characteristics of the needed drive device can be estimated by using the functional relationship. In addition, the set driving device design output tripping time and principle that the output torque of the static characteristics of the driving device is greater than the tripping torque can be used for calculation. The output torque has an impact on the tripping member of the outdoor VCB, so this calculation is relatively safe.

However, the tripping drive sometimes has additional requirements. For example, the high-voltage circuit breaker must operate without error at 65% of the rated voltage, and must not operate at 30% of the rated voltage. In this case, in addition to calculations, experimental verification is needed to ensure the pole mounted auto recloser reliability of the work.

4. Failure control of the buckle surface of the pole mounted recloser
The buckle of the locked door (or latches) and the locked hook is in line or small area contact. The contact point has to withstand high-impact stress. Also, the surface of the buckle has relative movement under higher pressure stress. Therefore, the surface strength, hardness and wear resistance of the material should be fully considered. Otherwise, plastic deformation, brittle peeling and pits will appear on the buckle surface. In a long term, the surface will be rough with the increase of tripping relay and wear, the geometric shape and size of the buckle part will be destroyed, and the stability and reliability of the tripping mechanism of the outdoor VCB will be affected.

Therefore, appropriate materials and surface treatment methods should be selected to make the surface of the automatic circuit recloser buckle has an appropriate hardness, and the internal components have sufficient strength and toughness. The purpose is to resist impact and prevent plastic deformation and brittle spalling on the surface. For example, using carbon steel quenching or surface carburizing quenching method can make the surface hardness reach a bonding state of about RC60. The transition part of the joint surface should be properly rounded corners to avoid bad contact and damage in the early stage.

As a professional electric power equipment company, Zhuhai Gopower Smart Grid Co., Ltd. was founded in 1998. It is one of the earliest high-tech companies engaged in the R&D and production of (12KV-40.5kV) medium-voltage transmission and distribution intelligent control equipment in China. We have a well-equipped, experienced, professional, dedicated and stable r&d technical team, and cooperate with domestic universities to jointly carry out research on the application and future direction of products in the field of smart distribution network, Our pole mounted disconnect switch such as load break switch 11kv, 15 kv pole mounted disconnect switch, feeder terminal unit have always been dedicated to providing customers with stable and reliable overall solutions for smart distribution networks with a professional spirit.

Features And Application Ranges of Automatic Recloser(2022年03月21日)

gopower — 2022-03-01T17:44:42+0900

https://www.zhgopower.com/features-and-application-ranges-of-automatic-recloser.html

The auto circuit recloser is a power distribution switch equipment with protection and automatic control functions. It can automatically break and reclose in the AC circuit according to the pre-set breaking and reclosing sequence, and then automatically reset and lock.

It can automatically detect the current flowing through the automatic circuit recloser loop. When the fault current is confirmed, the opening and closing operations should be performed based on the pre-set operation sequence and time interval to restore the power supply. If the fault is instantaneous, the automatic line recloser is in the cyclic operation of opening and closing. If the reclosing is successful, the subsequent opening and closing operations will be automatically terminated, and the pre-set state will be restored after a period of delay to prepare for the next failure. In case of permanent failure, the circuit recloser will automatically lock after completing the pre-set operation sequence, isolate the faulty section, and no longer supply power to the fault line. When the fault is eliminated, it is needed to manually remove the reclosing lock of the recloser to restore the normal state. Therefore, the automatic recloser can effectively avoid the effects of transient faults.

1. Features of automatic recloser
(1) It has the ability to automatically judge the nature of current, complete fault detection, and perform opening and closing functions. Also, it can automatically restore the initial state, memory the number of actions, complete the closing and locking, etc. In addition, it has functions such as operation sequence selection, breaking and reclosing characteristics adjustment.
(2) The operating power supply can be directly from the power grid or external low-voltage AC power supply.
(3) It has multiple reclosing functions with 4 times of breaking and 3 times reclosing in general, and it can adjust the number of reclosing and the reclosing interval time based on the needs.
(4) The interphase fault break adopts inverse time characteristics. The automatic recloser has fast and low ampere-second characteristic curves, and there is only one fast curve and 16 slow curves, which is beneficial to cooperate with protection and fuse.
(5) It has a large breaking capacity, allowing more breaking times and basic maintenance is generally not required.

2. Application range of automatic recloser
(1) It can be used at the 10kV outlet of the substation. And it can be used as a 10kV feeder, combined load current, overload current and short-circuit current. It can replace 10kV high-voltage circuit breakers without additional relay protection screens, control screens and DC screens, which can reduce overall investment, improve the degree of automation, and achieve unattended operation.
(2) It can be used in 10kV power distribution system trunk line, branch line and ring network line to replace general circuit breakers. It integrates switching, protection, and control into one, which is highly intelligent to improve the degree of automation. It can also achieve power supply for dual-loop and multi-loop pole mounted auto recloser ring networks, and it can achieve segmented delay power supply for long lines. The automatic recloser is equipped with four remote interfaces to facilitate the realization of urban network automation. In addition, it can achieve remote control at a close range, which is convenient for operation and reduces the workload of maintenance for operators.
(3) The automatic recloser electrical can be used for 10kV power distribution lines in oil fields and mines. It can achieve delayed closing and power transmission and peak-valley difference automatic power transmission, and a password can be set to prevent power theft.

As a professional electric power equipment company, Zhuhai Gopower Smart Grid Co., Ltd. was founded in 1998. It is one of the earliest high-tech companies engaged in the R&D and production of (12KV-40.5kV) medium-voltage transmission and distribution intelligent control equipment in China. We have a well-equipped, experienced, professional, dedicated and stable r&d technical team, and cooperate with domestic universities to jointly carry out research on the application and future direction of products in the field of smart distribution network, Our pole mounted disconnect switch such as pole mounted switch, 15 kv pole mounted disconnect switch, feeder terminal unit have always been dedicated to providing customers with stable and reliable overall solutions for smart distribution networks with a professional spirit.

What Are the Notes for Automatic Circuit Recloser?(2022年03月15日)

gopower — 2022-03-01T17:44:10+0900

https://www.zhgopower.com/what-are-the-notes-for-automatic-circuit-recloser.html

1. Notes for installation of the automatic circuit recloser
(1) The switch should be installed on the wall or in the main box to avoid direct rain and sun.
(2) The wiring terminal of the automatic circuit recloser should be installed with one end facing down to avoid rain dripping into the terminal.
(3) It is important to distinguish the neutral wire and the live wire of the mains AC220V, and connect them to the power input end of the protector.
(4) The power output of the protector should be connected to the power input of the load device.
(5) If the red indicator light is on after the power is turned on after 10 seconds, it indicates that there is a corresponding fault in the line. If the power supply still cannot turn off by turning off the switch for 10 seconds and then turning it on again, it indicates that the leakage current in the line exceeds the specified value, or there is an overcurrent short circuit. At this time, all loads should be turned off, the cause should be found out immediately, and the fault should be eliminated before transmitting the power.
(6) The automatic circuit recloser can replace the existing leakage switch and VCB circuit breaker. And the installed leakage protection switch should be removed during installation.
(7) A single-phase 220V power supply, power supply line and grounding wire of electrical equipment should be connected as indicated on the product panel. It should be noted that the input and output ends cannot be mistaken.
(8) The output line from the switch to the electrical equipment must be dedicated. The live wire and the neutral wire should not be connected with other power supply lines to avoid the cross power supply with other switches.

2. Notes for maintenance of the automatic circuit recloser
(1) The self-check of the leakage protection function of the automatic recloser should be implemented regularly. The test button can be pressed in the closed and energized state to check whether the equipment is operating normally.
(2) After three consecutive automatic reclosing fails, it is necessary to check the electrical equipment and circuit, and the power supply can be closed after clearing of faults.
(3) The leakage protection switch of the automatic circuit recloser shall not be affected by rain or snow during transportation, storage and use. Also, sun exposure should be avoided as much as possible and it is forbidden to operate with wet hands.
(4) The electric shock caused by simultaneous contact with the two wires of the protected circuit cannot be protected.
(5) When performing the action characteristic test, it is necessary to use the special test instrument that has been qualified by relevant national departments. It is strictly forbidden to test the device by short-circuiting the live wire to the ground wire to avoid the danger of electric shock.

As a professional electric power equipment company, Zhuhai Gopower Smart Grid Co., Ltd. was founded in 1998. It is one of the earliest high-tech companies engaged in the R&D and production of (12KV-40.5kV) medium-voltage transmission and distribution intelligent control equipment in China. We have a well-equipped, experienced, professional, dedicated and stable r&d technical team, and cooperate with domestic universities to jointly carry out research on the application and future direction of products in the field of smart distribution network, Our pole mounted disconnect switch such as pole mounted switch, 15 kv pole mounted disconnect switch, feeder terminal unit have always been dedicated to providing customers with stable and reliable overall solutions for smart distribution networks with a professional spirit.

The Main Function of the Automatic Circuit Recloser of the Transmission Line(2022年03月14日)

gopower — 2022-03-01T17:43:43+0900

https://www.zhgopower.com/the-main-function-of-the-automatic-circuit-recloser-of-the-transmission-line.html

1. The automatic circuit recloser can improve the reliability of the power supply of transmission lines
Transmission line faults can be divided into instantaneous faults and permanent faults. The experience of power system operation shows that more than 80% to 90% of the faults are instantaneous faults. For this type of fault, after the replay protection action is disconnected from the power supply, the arc at the fault point is automatically extinguished, and the insulation strength is restored before the fault is eliminated automatically. At this time, if the outdoor vcb breaker is closed again, the normal power supply can be restored. For permanent faults, such as pole collapse, wire breakage, insulator breakdown or damage, the insulation strength of the fault point cannot be restored after the power supply of the fault line is disconnected, and the fault will still exist. Even if the circuit breaker is closed again, it will be disconnected again by the relay protection device.

Most of the faults of transmission lines are instantaneous faults. Therefore, if the line is disconnected due to a fault and then reclosed, the possibility of the success of the restoration of the power supply is quite high. The automatic circuit recloser is an automatic device that makes the tripped circuit breaker automatically and quickly re-insert when the transmission line fails.

2. The automatic circuit recloser can speed up the voltage recovery speed of the power system after the accident treatment
The interruption of the power supply during the process of the automatic powerline recloser is very short. The reason is that it only takes a few seconds for the circuit breaker to trip and reclose after an accident on the transmission line. The voltage will restore before the motor is fully braked. At this time, the self-starting current of the motor is much smaller than that of the direct starting current, which is beneficial to the recovery of the system voltage.

3. The automatic circuit recloser can compensate for the impact of the reduction of the lightning resistance of the transmission line
In general, 10kV transmission lines are not equipped with lightning arresters in the power system. And 35kV lines are generally only installed lightning protection lines within 1km of the incoming line section, and the lightning resistance level of the line is low. AAR devices should be adopted as much as possible for transmission lines of various voltage levels to reduce the number of power outages caused by lightning and overvoltage on overhead transmission lines.

4. The automatic circuit recloser can improve the stability of the parallel operation of the system
After an accident trip occurs on the connecting line between systems, each system may have a power imbalance and insufficient power, and the system frequency and voltage will be severely reduced. For systems with excess power, the frequency and voltage will rise sharply. The pole mounted recloser can successfully reclose the line if the rotor position angle is not too large, and the whole system will quickly restore synchronization and maintain stable operation.

5. The automatic circuit recloser can correct the false tripping of the circuit breaker
For circuit breaker trips caused by the bad operation mechanism of the circuit recloser or the relay protection malfunction, the automatic circuit recloser enables the circuit breaker to quickly re-enter, which can correct the trip caused by this misoperation. The AAR device brings considerable benefits, and the device has a simple structure and reliable operation. Therefore, it has been widely used in power systems.

As a professional electric power equipment company, Zhuhai Gopower Smart Grid Co., Ltd. was founded in 1998. It is one of the earliest high-tech companies engaged in the R&D and production of (12KV-40.5kV) medium-voltage transmission and distribution intelligent control equipment in China. We have a well-equipped, experienced, professional, dedicated and stable r&d technical team, and cooperate with domestic universities to jointly carry out research on the application and future direction of products in the field of smart distribution network, Our pole mounted disconnect switch such as load break switch, 15 kv pole mounted disconnect switch, feeder terminal unit have always been dedicated to providing customers with stable and reliable overall solutions for smart distribution networks with a professional spirit.

Function and Operation of Load Break Switch(2022年03月08日)

gopower — 2022-03-01T17:43:00+0900

https://www.zhgopower.com/function-and-operation-of-load-break-switch.html

LBS Load Break Switch Function
LBS Load break switch is a kind of on-off switch with special arc extinguishing contact, arc extinguishing device and spring circuit breaker. It can only open and close the load current, or open and close the overload current, so it is only used to cut off and connect the circuit under normal conditions, not to open the short-circuit fault current. Since the arc extinguishing device and contact of the pole mounted load break switch are designed according to the load current cut-off and connection, the load break switch should be used together with the high-voltage fuse in most cases, and the latter is responsible for the task of cutting off the short-circuit fault current. With the continuous development of science and technology, the types of load break switch and its quality have increased and improved. At present, vacuum load switch, gas producing load switch and compressed air load switch are more popular.

LBS Load Break Switch Operation
1. Confirm the off position of the grounding switch, push the lbs load break switch (circuit breaker) into the plug position (with plug, test and draw out positions) and confirm that the load break switch position is normal.

2. Confirm that the load break switch (circuit breaker) is in the state of energy storage (if there is no energy storage, electric energy storage or manual energy storage can be used).

3. Operation closing:
Put the handle of the electric closing (opening) operation switch in the ready closing position, and then turn the switch to the closing position (this rotation should not exceed three seconds), and the load break switch (circuit breaker) acts to the closing state.
Such as manual mechanical closing, press the mechanical closing button to close, and the load break switch (circuit breaker) acts to the closing state.

4. After closing, check the indication of electric induction indicator, voltmeter and ammeter, and check whether the operation of high voltage cabinet and transformer is normal.

5. When the equipment is normal, the equipment operation record shall be made.
Types of Load Break Switch(LBS)
Gopower is a professional manufacturer of LBS load break switch, in which, 11kv load break switch, 15kv load break switch and 33kv load break switch has helped a lot in industrial projects.

As a professional electric power equipment ltd, Zhuhai Gopower Smart Grid Co., Ltd. was founded in 1998. It is one of the earliest high-tech companies engaged in the R&D and production of (12KV-40.5kV) medium-voltage transmission and distribution intelligent control equipment in China. We have a well-equipped, experienced, professional, dedicated and stable r&d technical team, and cooperate with domestic universities to jointly carry out research on the application and future direction of products in the field of smart distribution network, Our pole mounted disconnect switch such as remote t erminal unit, 15 kv pole mounted disconnect switch, feeder terminal unit have always been dedicated to providing customers with stable and reliable overall solutions for smart distribution networks with a professional spirit.

Function, Maintenance and Precautions of Outdoor Vcb Breaker(2022年03月07日)

gopower — 2022-03-01T17:42:10+0900

https://www.zhgopower.com/function-maintenance-and-precautions-of-outdoor-vcb-breaker.html

Outdoor VCB vacuum circuit breaker function
Protect large silicon rectifier and other high voltage electrical equipment.

Inquiry China vacuum circuit breaker price from auto recloser manufacturer.

As a professional electric power equipment ltd, Zhuhai Gopower Smart Grid Co., Ltd. was founded in 1998. It is one of the earliest high-tech companies engaged in the R&D and production of (12KV-40.5kV) medium-voltage transmission and distribution intelligent control equipment in China. We have a well-equipped, experienced, professional, dedicated and stable r&d technical team, and cooperate with domestic universities to jointly carry out research on the application and future direction of products in the field of smart distribution network, Our pole mounted disconnect switch such as scada remote terminal unit, 15 kv pole mounted disconnect switch, feeder terminal unit have always been dedicated to providing customers with stable and reliable overall solutions for smart distribution networks with a professional spirit.

Working Principle and Advantages and Disadvantages of VCB Breaker(2022年03月02日)

gopower — 2022-03-01T17:41:41+0900

https://www.zhgopower.com/working-principle-and-advantages-and-disadvantages-of-vcb-breaker.html

VCB Breaker Working Principle
Circuit breaker, also known as air switch, automatic circuit recloser. When the working current exceeds the rated current or short circuit and voltage loss occurs, the auto circuit recloser circuit will be automatically cut off. Compared with other circuit breakers, VCB vacuum circuit breakers are only different in arc extinguishing medium. There is no conductive medium in a vacuum, which makes the arc extinguish quickly, so the distance between the moving and stationary contacts of the circuit breaker is very small. The VCB breaker uses the plasma to rapidly diffuse and extinguish the arc when the current in high vacuum flows through the zero point, so according to VCB working principle, as to complete the purpose of cutting off the current. Inquiry China vacuum circuit breaker price from auto recloser manufacturer.

Advantages of VCB vacuum circuit breakers
1. The arc of VCB circuit breaker is extinguished in the sealed container, and the arc and hot gas are not exposed;
2. The contact gap is very small, only a few mm to 40 mm.
3. Short arcing time, low arcing voltage, small arcing energy, less contact wear and more allowable breaking times.
4. The inertia of the moving conducting pole is small and suitable for frequent operation;
5. Simple structure, small volume and light weight;
6. Low noise during operation;
7. There is no oil, so there is no danger of fire and explosion;
8. The contact part is completely sealed, so it is not easy to reduce the performance due to the influence of moisture, dust, harmful gas, etc. the breaking and closing performance is stable, the contact wear is small, and the service life is long.

Disadvantages of VCB vacuum circuit breakers
1. It is easy to produce switching overvoltage. When the inductive current is cut off, the current will be cut off, resulting in higher overvoltage. Therefore, an overvoltage absorption device should be installed.
2. It is difficult to monitor the vacuum degree during operation;
3. The composite insulator is easy to accumulates dust in the operation of a thermal power plant, so the environment of the auxiliary power room should be relatively clean.

As a professional electric power equipment company, Zhuhai Gopower Smart Grid Co., Ltd. was founded in 1998. It is one of the earliest high-tech companies engaged in the R&D and production of (12KV-40.5kV) medium-voltage transmission and distribution intelligent control equipment in China. We have a well-equipped, experienced, professional, dedicated and stable r&d technical team, and cooperate with domestic universities to jointly carry out research on the application and future direction of products in the field of smart distribution network, Our pole mounted disconnect switch such as sf6 load break switch, 15 kv pole mounted disconnect switch, feeder terminal unit have always been dedicated to providing customers with stable and reliable overall solutions for smart distribution networks with a professional spirit.

Comparison of Two Kinds of SF6 Pole Mounted Switches(2022年03月01日)

gopower — 2022-03-01T17:40:51+0900

https://www.zhgopower.com/comparison-of-two-kinds-of-sf6-pole-mounted-switches.html

SF6 Circuit Recloser of Pole Mounted Disconnect Switch
Structure: load break switch sf6 is a sulfur hexafluoride circuit breaker. The structure of SF6 circuit breaker is mainly porcelain post structure and tank structure.

Application: SF6 load break switch is mainly used in EHV large capacity power system.
Features: SF6 gas load break switch has the characteristics of blocking effect, long electrical life, high insulation level, good sealing performance, self-protection and low operating power.

SF6 Load Break Switch
Structure: the structure of SF6 load break switch is mainly arc extinguishing device, using SF6 gas as insulation and arc extinguishing medium.
Application: SF6 LBS has more application scenarios, one is used to make and break load current and overload current, the other is used to make and break no-load line, no-load transformer and capacitor bank.
Features: Load break switch SF6 has the characteristics of long electrical life, strong breaking force, three working positions, small current breaking and strong resistance to harsh environment.