YueBian Electric Co.,Ltd

Power Transformer Winding(2022年)

zjybelectric — 2022-05-25T16:43:21+0900

https://www.zjyb-electric.com/power-transformer-winding.html

Power Transformer Winding
The power transformer is a static electrical device, which is used to transform a numerical value of alternating voltage (current) into other voltage (current) with same frequency or several voltage (current) in different value. The rated voltage of the secondary winding of a power transformer refers to the no-load voltage of the secondary winding when the primary winding is under the rated voltage.

When the transformer is at full load, the impedance of the primary and the secondary winding of the transformer will cause the voltage drop of the transformer itself, which is equivalent to 5% of the rated voltage of the power grid, so that the terminal voltage of the secondary winding is smaller than the no-load voltage. In order to compensate for the voltage loss in the line, the rated voltage of the secondary winding of the transformer should be higher than the rated voltage of the power grid by 5%. Therefore, the rated voltage of the secondary winding of the transformer is 10% higher than the rated voltage of the same-level power grid.

When the electrical transformer is put into practice and the power supply radius is smaller, the voltage loss of the line can be ignored since the line is relatively short. At that time, the rated voltage of the transformer's secondary winding should be 5% higher than the rated voltage of the grid to compensate for the voltage loss of the transformer itself.

As one of power transformer manufacturers, we will do our best to meet all customers’ needs.

Pole Mounted Transformer Connections(2022年)

zjybelectric — 2022-05-25T16:42:58+0900

https://www.zjyb-electric.com/pole-mounted-transformer-connections.html

Pole Mounted Transformer Connections
When Installing this power transformer, remember the transformer should be at least 3M higher than the ground. Besides, the distance between the drop fuse and the ground should be over 4.5M, and the arrester and drop fuse should keep a distance of over 0.8M. The protective grounding must use more than 25 squares of stranded copper wire. Shared copper wires are prohibited in grounding.

Specific descriptions are:
How do you assemble a transformer on a 15-meter pole?

You can choose a ring with a diameter of 300mm, M20*100 and M20*350 screw, D200 channel steel to produce framework, and choose a 63*6 equal angle steel to make crossarm. The diameter of the installation position is determined at the scene, the root of which should be more than 2.5M. The equal diameter rod can be used to support the middle part.

Select the electric pole as follows:
1. A complete 15cc-15m dial diameter with the tailed diameter accounts for 1.25% of the length. 15*1.25=18.75+15=33.75 (head diameter of the rod)

2. To weld a 19cc-9m rod, with 1.25% tail length with a equal-diameter rod with a diameter of 30cc*. Use one one of them to connect the ground pile.

There are also many poles that can not install transformers, such as poles below 8 meters high (8 meters in not included). Because the pole should be buried 1.5-2.0 meters deep, the base of the transformer should keep a safe distance of 2.5M. Besides, enough room should be guaranteed for the incoming lines.

As one of distribution transformer manufacturers, Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest distribution transformer manufacturer in China.
YUEBIAN mainly produces oil immersed transformers and dry type transformers, conform to the standard IEC60076, capacity can reach 5000KVA, and the voltage grade can be up to 33KV.

Overview of Various Classifications of 10kV Transformers(2022年)

zjybelectric — 2022-05-25T16:42:32+0900

https://www.zjyb-electric.com/overview-of-various-classifications-of-10kv-transformers.html

Overview of Various Classifications of 10kV Transformers
1. Transformer overview
The 10kV transformer is referred to as "distribution". It refers to a kind of static electric appliance in the distribution system that converts AC voltage and current according to the law of electromagnetic induction and transmits AC electric energy. A 10kV transformer is usually a power transformer that operates in the distribution network with a voltage rating of 10-35kV (mostly 10kV and below) and a capacity of 6300KVA and below directly to the end user.

2. Sorted by installation location
The 10kV transformer is divided into indoor and outdoor depending on the installation location. Outdoor installation is divided into platform type, tower type and floor type (including pre-installed type).

2.1 pole tower
The tower type is a structure in which a transformer is mounted on a pole. It is divided into single pole and double pole.When the 10kV transformer capacity is 30KVA or less (including 30KVA), a single pole 10kV transformer gantry is generally used. Install a 10kV transformer, high-voltage drop fuse and high-voltage arrester on a cement rod. The shaft should be tilted 13°-15° in the opposite direction of the assembled 10kV transformer.

When the 10kV transformer capacity is between 50KVA and 315KVA, a double-pole 10kV transformer station is generally used. The 10kV transformer stage consists of a main rod cement rod and another auxiliary rod. The main pole is equipped with a high voltage drop fuse and a high voltage down conductor, and the secondary pole has a secondary reverse lead. The double pole 10kV transformer stage is sturdy with a single pole 10kV transformer.

The advantages of the tower type installation: the land occupation is small, the surrounding wall does not need to be fenced or covered, and the charged part is higher than the ground, which is not easy to cause accidents.
Disadvantages: The rack needs more steel and the cost is higher.

2.2 Pier type
The pier type is a square pier with 0.5-1 m masonry under the transformer pole, and the transformer is placed on it. Generally, a transformer of 315KVA or more is installed.

Pay attention to the following three points when installing a pier type transformer:

(1) A solid barrier or masonry wall of not less than 1.8m shall be installed around the transformer. The door shall be locked and kept by a special person.
(2) The barrier and fence should have sufficient safe operating distance from the transformer.
(3) Warning signs such as "high-pressure danger, no climbing" should be hung on poles or fences to prevent people and animals from approaching.

Advantages of the pier type installation: it is low in cost and easy to maintain and repair.
Disadvantages: It occupies a large area, and it is necessary to install a fence around it. Small animals are easy to climb to the charged part, which is prone to damage caused by external forces.

2.3 Floor type
Floor-standing means that the transformer is placed directly on the ground, and the high-voltage down-conductor, the drop-out fuse and the arrester are all on the line terminal rod. Pay attention to the following three points when installing a floor-standing transformer:
(1) A reliable fence must be installed around the transformer. The door should be locked and kept by a specific person.
(2) Warning signs such as "high voltage danger, no climbing" shall be hanged outside the fence.
(3) Since the live part of the transformer is very low from the ground, the person must enter the barrier after cutting off the power.

3. Classified by cooling method
According to the cooling method, it can be divided into oil-immersed and dry-type transformers.
Oil-immersed transformers rely on oil as a cooling medium, such as oil-immersed self-cooling, oil-infiltrated air-cooled, oil-immersed water-cooled, forced oil circulation, and the like. Dry-type transformers rely on air convection for natural cooling or increased fan cooling. They are used in small-capacity transformers such as high-rise buildings, high-speed toll stations, and local lighting and electronic circuits.

3.1 Oil-immersed transformers are divided into:
1) Non-closed oil-immersed transformer: It mainly has S8, S9, S10 and other series products, which are widely used in industrial and mining enterprises, agriculture and civil buildings.
2) Closed-type oil-immersed transformer: It mainly has S9, S9-M, S10-M and other series of products, which are mostly used in places with multiple oil and chemical substances in petroleum and chemical industries.
3) Sealed oil-immersed transformer: It mainly has BS9, S9-, S10-, S11-MR, SH, SH12-M and other series products, which can be used for power distribution in industrial and mining enterprises, agriculture, civil buildings and other places.

3.2 Dry type transformers are divided into:
1) Encapsulated coil type dry-type transformer: It mainly has SCB8, SC(B)9, SC(B)10, SCR-10 and other series products, suitable for high-rise buildings, commercial centers, airports, stations, subways, hospitals, factory and other places
2) Non-encapsulated coil dry-type transformer: It mainly has SG10 series products, suitable for high-rise buildings, commercial centers, airports, stations, subways, petrochemicals and other places.

4. Electric voltage regulation
According to the voltage regulation method, it can be divided into on-load voltage regulation and no-load voltage regulation.The so-called no-load voltage regulation and on-load voltage regulation all refer to the transformer tap changer voltage regulation mode. The difference is that the unloaded regulator switch does not have the ability to load shift gears, and the transformer must be powered off when shifting. The on-load tap-changer can be switched with load.

5. Phase number classification
According to the number of phases, it is divided into single-phase transformer and three-phase transformer.A single-phase transformer is a transformer in which the primary winding and the secondary winding are single-phase windings. The single-phase transformer has a simple structure, small volume and low loss, and is mainly small in iron loss, and is suitable for application and promotion in a low-voltage distribution network with a small load density.

Three-phase transformers are used for the rise and fall voltages of three-phase systems. For a three-phase transformer, there are generally three primary windings, which are divided into triangles and stars, and extended triangles. The voltages on the three windings are 120 degrees out of phase, which is the common three-phase 380 volt connection. The core of the iron core is a three-phase three-core column, a three-phase five-core column, and an involute shape.YueBian Electric Co.,Ltd is a professional 10kv oil transformer supplier. Welcome to purchase.

Overhead Transformer Connections(2022年)

zjybelectric — 2022-05-25T16:42:01+0900

https://www.zjyb-electric.com/overhead-transformer-connections.html

Overhead Transformer Connections
1. The distance between the wire of distributing line and pole or framework: at least 0.3m per 10kV and 0.1m per 0.4kV.

2. The net distance between lead wire, downlead in each phase and the lead wire or downlead of next phase: at least 0.3m per 10kV and 0.1m per 0.4kV.

3. The lapping zone of distributing line's downlead and overhead insulated line should be connected in T type clamp or insulating parallel groove and covered in insulating materials. Besides, use waterproof tape and self-adhesive insulating tape, corresponding to the voltage classes, in the joint of insulating wine and insulating cover, so that it can be waterproofed and dust-free.

4. The ground downlead should connect with the middle points of low voltage sides and the corresponding shells. After that, earth it again with the ground resistance below 10 ohm. In case the needs can not be met, you need to add the length of vertical and horizontal grounding objects.

5. The mounting height of pole distribution transformers and switch boxes should not lower than 3m.

6. Under the premise of satisfying the requirement of phase, the drop-out fuse should be installed on the highway side.

7. Before installing equipment, the mounting hole size should be checked carefully. If it doesn't match the installation drawing, you should contact with the design unit in time to let the problem properly solved.

As one of power transformer suppliers, we have types of power transformer for sale, anything you need, please leave us a message.

Oil Filled Transformer Maintenance(2022年)

zjybelectric — 2022-05-25T16:41:33+0900

https://www.zjyb-electric.com/oil-filled-transformer-maintenance.html

Oil Transformer Maintenance
Overhaul projects:

Removal of the hanging core or hanging cover for each accessory.

Maintenance of winding, lead devices and other equipment.

Maintenance of tap chargers.

Overhaul of iron core, core piercing screw, yoke beam, nail and ground piece.

Cleaning and maintenance of oil tank, casing, radiator, safe airway and expansion tank.

Testing of electrical transformer equipment such as oil purifier, respirator, expansion tank capsule and releaser.

Inspections and maintenance of gas relay and thermometer.

Drying of the transformer when necessary.

Replacement of all seal pads and leaking test for components.

Inspections and cleaning for the air porcelain.

Oil treatment of transformers.

Regular inspections and test.

Minor repairs:

Clean the shells.

Check and eliminate defects that have been found.

Clean the casing and tighten the wiring bolts of each casing.

Inspect expansion tank and oil level gauge.

Check the respirator and oil purifier, and replace the silicone when necessary.

Repair the submersible pump and the cooling fan of coolers.

Check the connection of the joints, valves and seal pads.

Repair gas relay and thermometer.

Check and debug the voltage regulator, measuring device and control box.

Analyze samples, and adjust oil level of casings and the transformer.

Clean and paint oil tank as well as accessories.

Conduct measurement and test according to regulations.

Clean the air porcelain.

High-voltage test.

As an oil immersed transformer manufacturer, we have types of related products for sale, if you have needs, please contact us.

10kv, 35kv Three Phase on Load Tap Changer Transformer(2022年01月21日)

zjybelectric — 2022-01-14T17:22:48+0900

https://www.zjyb-electric.com/blog/three-phase-on-load-tap-changer-transformer.html

1. Brief Description
SZ11 series on load tap changing transformer is an upgraded product developed based on S11 series oil-immersed transformer. The voltage fluctuation and load change of power grid lead to fluctuation of output voltage of transformer during the running. If the voltage is too high or too low, the electric equipment will fail to work normally and even be burnt, and the insulation and efficiency of the transformer will be influenced. To ensure the variation of the output voltage within a reasonable range, voltage regulation is necessary. The product may operate the on-load tap changer manually or automatically to regulate the voltage when it is loaded, or realize remote voltage control through a controller.
10kv, 35kv Three Phase on Load Tap Changer Transformer
2. Application Scope
The product applies to the users who require stable voltage and the voltage fluctuation of power grid is big.

3. Model Description
Model Description
4. Standards
GB 1094.1, GB 1094.2, GB 1094.3, GB 1094.5,
IEC 60076-1:2000,IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,GB/T 6451,GB/T 20052,etc

GB 1094.1, GB 1094.2, GB 1094.3, GB 1094.5,
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451, GB/T 20052, etc

5. Normal Service Conditions
Height above sea level: Not greater than 1,000m;
Ambient temperature: Maximum temperature: +40ºC;
Maximum daily average temperature: +30ºC;
Maximum annual average temperature: +20ºC;
Minimum outdoor temperature: -25ºC;
Installation environment: ground acceleration caused by earthquake: ag<2m/s

6. Features
(1) On-load voltage regulation is possible, thus providing users with stable voltage output.
(2) The low voltage adopts foil winding, thus enhancing the ability of the transformer to withstand the sudden short circuit; as the low voltage adopts copper foil winding, the electric field distribution of transformer is uniform. The low-voltage inner frame adopts formed hard paper tube, while the high-voltage outer half lap is wound with tasteless glass adhesive tape layer by layer. The compression pad adopts the laminated wood, thus enhancing the mechanical strength of the transformer. The transformer uses vacuum oil filling, which may totally eliminate the bubble in the coil, so as to improve the overall ability of the transformer to withstand the sudden short circuit.
(3) The tank rim adopts stainless steel bolts, with beautiful appearance.
(4) The sealing elements adopt formed parts, with the sealing reliability of the transformer enhanced.

Company Profile
Yuebian Electric Co., LTD is a professional electrical manufacturer engaged in power transformer up to 35kv and other electrical equipment. For instance, amorphous alloy power transformer, dry-type transformer, oil-immersed transformer, with type, combined transformer substation, high and low voltage complete switchgear, rectifier transformer, electric furnace transformer, mining and another special purpose transformer. After nearly 10 years of development, Yuebian Electric has now become one of the major suppliers of Chinese state grid and the southern power grid.
Yuebian electric is located in Yueqing City, Zhejiang Province. As the forefront of reform and opening up, Yueqing provides us convenient traffic conditions. Our Industrial park covers an area of 20000 square meters, and the annual design production capacity is almost 300 million dollars. The modern garden-like factory has several functions, for example, production, technology development, staff living, learning, and entertainment. Hereinto, production plant owns 2 spacious and bright body building, 11 workshops, and more than 260 sets of advanced production and testing instruments, which guarantee the high quality of our products; Perfect function design of the complex and the r&d center adopt ERP management system which provide an advanced platform for e-commerce, operations management, and the product innovation; At the same time, our quiet and graceful staff living area provides employees with a comfortable living environment which owns dine, entertainment, information, learning, and other functions
Currently, Yuebian electric has more than 30 senior engineering and technical talents, including 5 senior engineers. The strong technical force provide us with effective guarantee about product research and development. The company has got the certification of ISO9001:2008 quality management system.

Contact Information:
Name: Rayzen He(Mr.)
Mobile: +86 13506557391

Yuebian Electric Co., Ltd.
Add: Jiedai Industrial Zone,
Yueqing City,
Guangdong Province,
China
Web: www.zjyb-electric.com
Tel: 86-577-62566535
Fax: 86-577-62513338
Zip Code: 325600

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest electrical transformer manufacturers in China. We provide power transformer, electrical distribution transformer, oil transformer, package substation and etc. Want to know oil immersed transformer price or more ? Contact us.

The Basic Components of The Transformer(2022年01月20日)

zjybelectric — 2022-01-14T17:22:21+0900

https://www.zjyb-electric.com/blog/the-basic-components-of-the-transformer.html

Transformer components include the body of (core, the winding, insulation, lead), transformer oil, fuel tank and cooling devices, pressure devices, protective devices (moisture, safety airways, gas relay, conservator and temperature measuring devices) and bushing.
The Basic Components of A Transformer
1. Core

Core transformer in the main part of the magnetic circuit. Usually it consists of a high silicon content, thickness, respectively 0.35mm \ 0.3mm \ 0.27mm, the surface coated with insulating paint hot or cold rolled silicon steel sheet piled up.

Iron legs and cross piece into two parts, legs sheathed with windings; cross-piece is closed magnetic purposes.

The basic form of the core structure determined formula shell two.

2. Winding

It is part of the transformer winding circuit, which is double insulated flat wire or silk bag enamelled round wire wound into.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest power transformer manufacturers in China. We provide power transformer, electrical distribution transformer, oil transformer, electrical transformer and etc. Want to know oil immersed transformer price or more ? Contact us.

Power Distribution Transformer Oil Immersed Type Transformer(2022年01月19日)

zjybelectric — 2022-01-14T17:21:55+0900

https://www.zjyb-electric.com/blog/power-distribution-transformer-oil-immersed-type-t.html

Summary

The performance of 35kV oil-immersed power transformer of the company conforms to or is superior to the requirements of GB1094 Power Transformers and GB/T6451 Specification and Technical Requirements for Three-phase Oil Immersed Power Transformers. Its core is made of high-grade superior cold-rolled silicon steel sheet, and the coil conductor adopts high-quality oxygen-free copper, with beautiful appearance and compact structure.
Power Distribution Transformer Oil Immersed Type Transformer
Production:

1. Brief Description
The performance of 35kV
oil-immersed power transformer
of the company conforms to or is superior to the requirements of GB1094 Power Transformers and GB/T6451 Specification and Technical Requirements for Three-phase Oil Immersed Power Transformers. Its core is made of high-grade superior cold-rolled silicon steel sheet, and the coil conductor adopts high-quality oxygen-free copper, with beautiful appearance and compact structure.

2. Application Scope
The product applies to power, petrochemical, coal, building material, metallurgical and textile industries.

3. Model Description
model description
4. Standards
GB1094.1, GB1094.2, GB1094.3, GB1094.5
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451, etc

6. Features
1. The product adopts four-stage stepping joint, thus greatly reducing the gap reluctance of joint, improving the magnetic property of whole core and lowering the core noise caused by magnetostriction.
2. The winding adopts the oil guiding structure, thus improving the heat dissipation effect of winding and increasing the overload capability of transformer.
3. The product adopts reliable and solid positioning, thus ensuring no displacement of transformer after long-distance transportation and long-time operation and no deformation of winding, and the product may be directly connected to the grid to be used, not suspending the core.
4. The core and clamp may be led out from separate bushing and grounded according to user's habits and requirements.
5. The sealing elements adopt formed parts, achieving good sealing effects.
6. The product features stable performance, high reliability, compact structure, beautiful appearance, energy-saving and consumption reduction.

Company Profile:

Yuebian Electric Co., LTD is a professional electrical manufacturer engaged in power transformer up to 35kv and other electrical equipment. For instance, amorphous alloy power transformer, dry-type transformer, oil-immersed transformer, with type, combined transformer substation, high and low voltage complete switchgear, rectifier transformer, electric furnace transformer, mining and other special purpose transformer. After nearly 10 years of development, Yuebian Electric has now become one of the major suppliers of Chinese state grid and southern power grid.
Yuebian electric is located in Yueqing City, Zhejiang Province. As the forefront of reform and opening up, Yueqing provides us convenient traffic conditions. Our Industrial park covers an area of 20000 square meters, and the annual design production capacity is almost 300 million dollars. The modern garden-like factory has several functions, for example production, technology development, staff living, learning and entertainment. Hereinto, production plant owns 2 spacious and bright body building, 11 workshops, and more than 260 sets of advanced production and testing instruments, which guarantee the high quality of our production; Perfect function design of the complex and the r&d center adopt ERP management system which provide an advanced platform for e-commerce, operations management, and the product innovation; At the same time, our quiet and graceful staff living area provides employees with a comfortable living environment which owns dine, entertainment, information, learning, and other functions
Currently, Yuebian electric has more than 30 senior engineering and technical talents, including 5 senior engineers. The strong technical force provide us with effective guarantee about product research and development. The company has got the certification of ISO9001:2008 quality management system.

If you are interested in our products, feel free to contact me!

Contact Information:
Name: Rayzen He(Mr.)
Mobile: +86 13506557391

Yuebian Electric Co., Ltd.
Add: Jiedai Industrial Zone,
Yueqing City,
Guangdong Province,
China
Web: www.zjyb-electric.com
Tel: 86-577-62566535
Fax: 86-577-62513338
Zip Code: 325600
Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest transformer supplier in China. We provide power transformer, electrical distribution transformer, oil transformer, step down transformer and etc. Want to know oil immersed transformer price or more ? Contact us.

High Overload Oil-Immersed Amorphous Alloy Transformer(2022年01月18日)

zjybelectric — 2022-01-14T17:21:23+0900

https://www.zjyb-electric.com/blog/oil-immersed-amorphous-alloy-transformer.html

High-overload Oil immersed Transformer

1. Brief Description
The seasonal variation, personal mobility, and the difference of power consumption of residents at different time periods of day and night lead to big load fluctuation of power distribution network of China, the capacity of distribution transformer doesn't match the power demands, the specific transformers of general enterprises run at no load or at light load in over 70% of the time, and the common transformers of residents run at no load or at light load in over 80% of the time, resulting in high loss of transformer.

High Overload Oil-Immersed Amorphous Alloy Transformer

2. Application Scope
The product has been widely applied in new and reconstruction projects of urban and rural power grids, and is especially suitable for the areas where the seasonable fluctuation of power consumption is big, the difference of power consumption at day and night is big and the daily maintenance is difficult. As the transformer adopts fully sealed structure and avoids contact with the air, it may run in the humid environment and is the ideal power distribution equipment for urban and rural power distribution network.

3. Model Description
Model Description

4. Standards:
GB1094.1, GB1094.2, GB1094.3, GB1094.5,
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451,etc

GB1094.1, GB1094.2, GB1094.3, GB1094.5,
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451, etc

6. Features
(1) The product may overload at double the rated capacity for 1h, at 1.75 multiples of rated capacity for 3h and 1.5 multiples of rated capacity for 6h while ensuring normal service life of the transformer.
(2) The low voltage adopts foil winding, thus enhancing the ability of the transformer to withstand the sudden short circuit; as the low voltage adopts copper foil winding, the electric field distribution of transformer is uniform. The low-voltage inner frame adopts formed hard paper tube, while the high-voltage outer half lap is wound with tasteless glass adhesive tape layer by layer. The compression pad adopts the laminated wood, thus enhancing the mechanical strength of the transformer. The transformer uses vacuum oil filling, which may totally eliminate the bubble in the coil, so as to improve the overall ability of the transformer to withstand the sudden short circuit.
(3) The tank rim adopts stainless steel bolts, with beautiful appearance.
(4) The oil tank adopts the fully sealed tank, thus isolating the transformer oil from the air, and slowing down the aging of transformer oil. The sealing elements adopt formed parts, with the sealing reliability of the transformer enhanced.

Yuebian electric is located in Yueqing City, Zhejiang Province. As the forefront of reform and opening up, Yueqing provides us convenient traffic conditions. Our Industrial park covers an area of 20000 square meters, and the annual design production capacity is almost 300 million dollars. The modern garden-like factory has several functions, for example production, technology development, staff living, learning and entertainment. Hereinto, production plant owns 2 spacious and bright body building, 11 workshops, and more than 260 sets of advanced production and testing instruments, which guarantee the high quality of our production; Perfect function design of the complex and the r&d center adopt ERP management system which provide an advanced platform for e-commerce, operations management, and the product innovation; At the same time, our quiet and graceful staff living area provides employees with a comfortable living environment which owns dine, entertainment, information, learning, and other functions

Currently, Yuebian electric has more than 30 senior engineering and technical talents, including 5 senior engineers. The strong technical force provide us with effective guarantee about product research and development. The company has got the certification of ISO9001:2008 quality management system.

If you are interested in our products, contact us now!

Contact Information:
Name: Rayzen He(Mr.)
Mobile: +86 13506557391
Yuebian Electric Co., Ltd.
Add: Jiedai Industrial Zone, Yueqing City, Guangdong Province, China
Web: www.zjyb-electric.com
Tel: 86-577-62566535
Fax: 86-577-62513338
Zip Code: 325600

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest dry type transformer manufacturer in China. We provide power transformer, oil transformer and etc. Want to know oil immersed transformer price or more ? Contact us.

Advantages and Disadvantages of Dry Type Distribution Transformer and Oil-immersed Transformer(2022年01月17日)

zjybelectric — 2022-01-14T17:20:50+0900

https://www.zjyb-electric.com/blog/advantages-and-disadvantages-of-dry-type-distribution-transformer-and-oil-immersed-transformer-and-their-differences.html

In price, dry type distribution transformers are more expensive than oil immersed transformers. In terms of capacity, there are more large-capacity oil immersed transformers than dry type distribution transformers. Dry type distribution transformers shall be used in comprehensive buildings (basements, floors, roof, etc.) and crowded places. The oil-immersed transformer is used in independent substation. The box transformer is generally used in the box transformer.

Oil transformer is generally used for outdoor temporary electricity. In the construction, the selection is based on the size of the space. When the space is large, the oil immersed transformer can be selected. When the space is crowded, the dry transformer can be selected. The regional climate is humid and hot, easy to use oil. In the case of dry distribution transformers, forced air cooling equipment must be provided.

The oil immersed transformer is low cost and easy to maintain, but it is flammable and explosive. Dry type distribution transformers can be installed in the load center to reduce voltage loss and power loss due to their good fire resistance. But the dry type distribution transformer price is high, the volume is big, moisture-proof dustproof is bad, and the noise is big.

In terms of output and consumption, the current voltage grade of dry type distribution transformer is only 35kV, and the capacity is smaller than that of oil-immersed transformer, about 2500kVA. Because dry type distribution transformer manufacturing process is relatively the same voltage level with the capacity of the oil transformer to be complex, the cost is also high. So the amount of oil - immersed transformer or more. However, due to the environmental protection of dry type distribution transformer flame retardant, impact resistance and other advantages, and often used for indoor high demand power supply and distribution places, such as hotels, office buildings, high-rise buildings and so on.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest distribution transformer manufacturers in China. We provide power transformer, oil transformer and etc. Want to know oil immersed transformer price or more ? Contact us.

Application Of Single Phase Transformer(2022年01月16日)

zjybelectric — 2022-01-14T17:20:25+0900

https://www.zjyb-electric.com/application-of-single-phase-transformer.html
Application Of Single Phase Transformer

After the transformation of urban and rural power grid to a certain extent, the share of line loss will be greatly reduced, and the loss of distribution transformer will occupy the main position of network loss. Only when the loss of iron core is greatly reduced can the power loss of the power grid be further reduced. Therefore, the reel core and amorphous core single-phase transformer have great potential for development. At present, the three-phase transformer and the three-phase concentrated power supply system still dominates, and single-phase transformer and the single-phase power supply system is just the supplement. In the practical application of transformer, we should make full use of the advantages and characteristics both of three-phase transformer and single-phase transformer, and choose suitable transformer varieties according to the power load, and configure the power supply with the economic power supply radius.

At present, single-phase transformers are mainly used in residential district electricity consumption, rural lighting or small power consumption, low load density and less load point areas, as well as the residential areas and markets with serious electricity theft. Small industrial users are encouraged to use electricity from the originally integrated transformer to a specific using transformer.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest oil filled transformer manufacturers in China. We provide power transformer, oil transformer and etc. Want to know application of three phase transformer or more ? Contact us.

Application Of Instrument Transformer(2022年01月15日)

zjybelectric — 2022-01-14T17:19:56+0900

https://www.zjyb-electric.com/application-of-instrument-transformer.html

Application Of Instrument Transformer

The wiring of the instrument transformer shall comply with the connection principle: The first winding should be connected in series with the circuit under test while the second winding in series with all the instrument loads.

Select the appropriate ratio according to the measured current size, otherwise the error will increase. At the same time, the secondary end must be grounded to prevent the primary low-voltage side from channeling into the secondary low-voltage side, causing damaging to people and equipment, when the insulator breaks.

The secondary side is absolutely not allowed to be open, because once the circuit is open, the primary current will transform into magnetized current, causing the sudden increase of M and E2, resulting in excessive saturation and magnetization of the core which may heat severely and burn the coils. When the current transformer works normally, the secondary side is used to connect in series with the current coils, such as measuring instruments and relays. The impedance of the current coil is very small, making the secondary side close to short-circuit.

The installation site of the protection equipment for current transformer shall be the vacancies uncovered by the main protection equipment.

In order to prevent the busbar fault caused by the flashover of the pillar-type current transformer, the current transformers are usually stalled on the outlet of circuit breakers or the side of the transformers.

To reduce the damage of the internal failure of generators, the current transformer used to automatically adjust the excitation device shall be placed on the outlet side of the stator winding of generators. And the current transformer for the measuring instrument should be installed on the neutral point of a generator in order to facilitate the analysis on finding the internal faults before the generator incorporates into the system.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest power transformer suppliers in China. We provide power transformer, oil transformer and etc. Want to know more ? Contact us.

Application Of Core Type Transformer(2022年01月14日)

zjybelectric — 2022-01-14T17:19:30+0900

https://www.zjyb-electric.com/application-of-core-type-transformer.html

Application Of Core Type Transformer

Core type transformer: the power transformer is divided into core structure and shell structure according to the structure of iron core, and the core of core structure is surrounded by winding.

The structure features of three phase core transformer are that the three phase magnetic circuit is connected together. The magnetic circuit of each phase is used as its own circuit with the other two phase magnetic circuit.

Compared with shell type transformer, it has the advantages of low consumption materials, low price, small occupation area and simple maintenance. Therefore, it is widely used. But in large-capacity giant transformers, three-phase group transformers are often used in order to facilitate transportation and reduce spare capacity.

The core type transformer uses this advantage to be used for high voltage power transformer. For example, the 12 pulse wave rectifying device composed of three-phase five-pillar rectifying transformer is a good case. With core type's high reliability, sufficient power supply capacity, sufficient development space, less investment and low operation cost, the power plant upgrading and upgrading of core transformer are provided for chemical plants. The efficiency of electricity consumption is improved and the cost is effectively reduced.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest power distribution transformer manufacturers in China. We provide power transformer, oil transformer and etc. Want to know applications of core type transformer or core type transformer advantages ? Contact us.

Winding Resistance Test Of Transformer(2021年11月24日)

zjybelectric — 2021-11-24T17:18:58+0900

https://www.zjyb-electric.com/winding-resistance-test-of-transformer.html

Winding Resistance Test Of Transformer
The measurement for the temperature of winding

The temperature in the channel between the high and low pressure winding passages which is measured by dry type transformer is seen as the temperature of winding;

The average temperature between the top and the bottom oil measured by the oil—immersed transformer is seen as the temperature of winding.

The selection of measuring current

The measuring current can not be over 15% of the rated current of the tested winding;

The measuring current should be selected within the range of the testing resistance as stipulated by instrument;

The tester for the DCR of transformer:

5A 1mΩ—4Ω

10A 0.2mΩ—2Ω

20A 0.1mΩ—1Ω

The measurement of winding resistance

According to the point 7 to connect the test line, when we use the magnetic circuit method, the current direction of magnetic winding should be in accordance with that of the same end of the tested winding. On the basis of the point 9.2 of technical conditions of products, when it comes to the power switch of instrument, we should select the measuring current by pressing the mode button and press the start key to measure the winding resistance. After the result becomes stable, record the value. Then press the reset key to discharge off and the measurement ends.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest electrical transformer manufacturers in China. We provide dry transformer, oil transformer and etc. Want to buy transformer? Contact us.

Winding High Voltage Transformer(2021年11月24日)

zjybelectric — 2021-11-24T17:18:25+0900

https://www.zjyb-electric.com/winding-high-voltage-transformer.html

Winding High Voltage Transformer
In a word, a transformer is a high voltage winding, composed of a copper core or an aluminum core, and a low voltage winding and a core, the high voltage winding is subjected to high pressure, and it has the insulation level under high pressure. Low voltage windings bear and output low voltage, and the principle of electromagnetic induction is known to all.

The transformer's high voltage windings are relative to the low-voltage windings, and the primary coils may be high voltage windings or low-voltage windings. Mainly look at the function of transformer. There are many layers of windings because no matter the high pressure area or the low pressure area is determined by the length of the winding conductor of the corresponding thickness, this is also an important factor in determining the volume of the transformer.

The input voltage is 10 kV, and the output voltage is 0.22/0.4 kv.
The input end is the high voltage winding, and the output end is the low voltage winding. An ultra high voltage transformer with an input voltage of 500 kV, its output voltage is 110 kV; The input end is the high voltage winding, and the output end is the low voltage winding. The input voltage is 220 V, the output voltage is 12 V, 6 V and so on. The input end is the high voltage winding and the output end is the low voltage winding.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest power transformer manufacturers in China. We provide dry type transformer, oil transformer and etc. Want to buy transformer? Contact us.

What Are the Advantages and Disadvantages of oil Type power transformer and Dry Type Transformer?(2021年11月28日)

zjybelectric — 2021-11-24T17:17:49+0900

https://www.zjyb-electric.com/what-are-the-advantages-and-disadvantages-of-oil-type-power-transformer-and-dry-type-transformer.html

Transmission and distribution transformer oil type transformers are more common in our daily lives. Some power poles, roadsides, etc. have transformers for distribution. The operating conditions of these power transformers are generally relatively simple. Fully sealed oil type power transformers are placed in the open air.

The oil type distribution transformer is the same as the dry type transformer. It is a power transformer, and there will be a core for the magnetic circuit to make the winding of the circuit.

The biggest difference is in "oil filled" and "dry". That is to say, the cooling medium of the two is different. The former uses transformer oil (and of course other oils such as beta oil) as the cooling and insulating medium, and the latter uses air or other gases such as SF6 as the cooling medium. Oil filled transformer is to place the body consisting of iron core and winding in a fuel tank filled with transformer oil. Dry type transformer often encloses the core and windings with epoxy resin. There is also a kind of non-encapsulated type that is used nowadays. The windings are impregnated with special insulating paper with special insulating paper to prevent the windings or core from getting wet. (Because the two are derived from different categories due to different methods of process, use, and structure, we are narrowly speaking.) In terms of production and usage, the current dry type transformer's voltage rating is only 35kV. The capacity is small compared to oil filled transformer, about 2500kVA. Moreover, since the dry type transformer manufacturing process is complicated and costly with respect to the oil filled transformer of the same voltage level and the same capacity, the oil filled transformer is still much more in terms of the amount of oil. However, due to the environmental protection of dry change, flame retardant, impact resistance and so on, it is often used in indoor and other high-demand power supply and distribution sites, such as hotels, office buildings, high-rise buildings and so on. If you are just a transformer user, it should be enough to understand this.

YueBian is one of
oil type power transformer suppliers
in China. Welcome to buy our products.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest dry type transformer manufacturer in China. We provide electrical transformer, oil transformer and etc. Want to buy transformer? Contact us.

Utility Transformer Connections(2021年11月27日)

zjybelectric — 2021-11-24T17:17:17+0900

https://www.zjyb-electric.com/utility-transformer-connections.html

Utility Transformer Connections
The transformer can be directly thrown into the transformer room by the car crane, or seting up a temporary track with the daewood, use a three-step and suspension chain to carry the transformer to the temporary track, and then use the chain to pull into the suitable position in the room.
When the transformer is in place, it should be noticed that its direction and distance away from the wall should be in line with the drawing with a permissible error to be ±25 mm. When the drawing is unmarked, the vertical position shall be in place as the track, and the transverse distance from the wall shall not be less than 800 mm, and the distance from the gate shall not be less than 1000 mm.

The shell of power transformer should be reliably grounded. The working zero line and neutral grounding line should be laid separately, and the working zero line can not be buried underground. The place where the neutral grounding loop of the transformer closes to the transformer should be made detachable joint bolts.

The transformer with valve type arrester should meet the grounding requirements: the transformer neutral point, transformer shell and arrester should be connected to a common place to ground.

The grounding resistance should be ≤4 ohms. The zero line and ground line of the transformer shall be connected separately and shall not be together. The ground line of the transformer is next to the transformer base, and the zero line of the transformer is the N line of the low pressure pile.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest distribution transformer manufacturers in China. We provide step down transformer, oil transformer and etc. Want to buy transformer? Contact us.

Transformer Testing Methods(2021年11月26日)

zjybelectric — 2021-11-24T17:16:48+0900

https://www.zjyb-electric.com/transformer-testing-methods.html

Transformer Testing Methods
Different capacity transformers, different measurement methods, different voltage grades, different core structures and so on, their measurement time is different. If the single phase measurement is directly on the low pressure side, it takes 40~50 minutes to measure a phase. For a 150 MVA transformer magnetometer, it takes approximately 3~5 minutes to measure each phase. And if without saturable magnetic circuit, it takes about 30 minutes for each phase. For the high voltage power transformer with a voltage rating of 35 KV, the measurement time of the transformer is greatly reduced and it's not necessary to use the saturable magnetic circuit method. For the three core transformers below 120 MVA, the saturable magnetic circuit method is not used, too. The measurement can be carried out directly within 20 minutes generally. For star connection, measurement data shows that it is stable.

Resistance experience: check the resistance of the coils to determine the veracity of the data before DC resistance test. For example, for a large of 240 MVA or 360 MVA, its low voltage side resistance is generally about 1 M Omega or 2M Omega. If without saturable magnetic circuit method, the initial measurement data is about 4 m Ω ~ 10 m Ω and very stable. After about 10 minutes the date begins to get small.

The change law of data: in the case of the direct resistance measurement of the low-voltage side of large distribution and power transformers, the first data is far away from the real value, and it is stable for a period of time. Then the date gradually starts to change, bigger or smaller, and the change gets fast. And then the date gradually changes slowly to achieve almost no change finally and get the real resistance. This change tends in one direction, for example, getting smaller and smaller until the real value. If the date is erratic or remains (almost) unchanged for a long time and it's far away from the real value, we should check whether the wiring is wrong.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest oil filled transformer manufacturers in China. We provide distribution transformer, oil transformer, distribution transformer testing, power transformer testing, transformer testing and etc. Want to buy transformer? Contact us.

Transformer Megger Test(2021年11月25日)

zjybelectric — 2021-11-24T17:16:16+0900

https://www.zjyb-electric.com/transformer-megger-test.html

Transformer Megger Test

The megger has three terminal posts: one for "L", one for "E" and one for "G" (shield). L is connected to the wires, E is connected to the cable, and the "G" is attached to the insulated paper of the cable. The following points should be noted when measuring:
The power must be cut off first.
The megger must be kept flat when used.
Before we use the megger, we need to rotate several times to see whether the pointer is at the largest location. Then we will short-circuit the two terminals of "L" and "E", then slowly turn the hand of mega ohmmeter to see whether the pointer is at zero.
The megger cable must be insulated well, and the two lines shall not be twisted together.
When measuring the megger, the reading should be based on the number after a minute of rotation.
During the measurement, the number of meters should be transferred to 120 revolutions per minute.
The megger has a range of several thousand megaohm, with a minimum scale of about 1 trillion euro, which is not suitable for measuring the resistance below 100 kiloohm.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest power transformer suppliers in China. We provide power transformer, oil transformer and etc. Want to buy transformer? Contact us.

Transformer Maintenance Guide(2021年11月24日)

zjybelectric — 2021-11-24T17:15:48+0900

https://www.zjyb-electric.com/transformer-maintenance-guide.html

Transformer Maintenance Guide
Check the cleanliness of the casing and magnetic road, and clean up in time to keep them clean and prevent flashover.
When the cooling device is running, make sure that the butterfly valve in the inlet and outlet of the cooler is open and the radiators are open with entrance clean. The steering of the submersible pump and the running condition (no abnormal sound and obvious vibration) should also be checked as well as the operation of fans. Make sure that the automatic power switch of cooler control box is well closed with no vibration and abnormal voices; and the cooler doesn't leak oil.
Ensure that electrical connections are tight and reliable.
Check the tap-charger regularly and check the fastening, burns, scars, rotation flexibility and connecting positions of the contact.
The coil, casing and lightning arrester should be tested every 3 years.
The reliability of the lightning arrester is checked every year. The grounding of the arrester must be reliable, with the lead as short as possible. The ground resistance should be detected in dry seasons, which can not exceed 5 Omega.
Replace the desiccant of respirators and oil used in the oil bath.
Test fire facilities regularly and record the their maintenance and performances in detail.

Electrical Transformer Maintenance(2021年08月20日)

zjybelectric — 2021-08-13T15:40:58+0900

https://www.zjyb-electric.com/electrical-transformer-maintenance.html

Electrical Transformer Maintenance
It is a fundamental requirement for transformer professionals to understand its working principles and the internal structure of the transformer itself. Before the repair work, the staff must be prepared to analyze the possible problems and prepare the various materials and tools to be used in the maintenance. At the same time, contact with the welder, the engineer, the chemical oil treatment personnel and so on the staff that may help, and let them coordinate work. A power outage should be conducted prior to the maintenance of the transformer, and the transformer shall be in a state of stop working, and adjust all the things accordingly as needed. At the same time, the staff should pay attention to their own clothes and other things, don't dress a lot of jewelry or other things on the clothes, and to ensure the safety, don't bring any other small devices, and avoid mistakes or things that are forgetted that affected the transformer maintenance and repair work.
When everything is ready, with the knowledge of the transformer, skilled technical, proficient skills, and light packing, the staff can start to repair work. Of course, always keep in mind the belief of "safety first" in the maintenance process.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest dry type transformer supplier, we provide transformer maintenance service, double wound transformer definition, oil immersed transformer and etc. Want to know more? Please contact us.

Maintenance Of Distribution Transformer(2021年08月19日)

zjybelectric — 2021-08-13T15:38:22+0900

https://www.zjyb-electric.com/maintenance-of-distribution-transformer.html

Maintenance Of Distribution Transformer
Check the temperature of the transformer: See whether the upper oil temperature of the transformer is normal or near or over the maximum allowable limit from the thermometer. When there is a significant anomaly between the temperature that glass thermometer indicates and that the pressure thermometer indicates, it is necessary to find out whether the meter is not accurate or the oil temperature is abnormal.

The check of the oil level: Check whether the temperature of transformer oil storage cabinet is normal and if there is false oil level and oil leakage phenomenon; whether oil level of high voltage bushing and the color of oil is normal and whether bushing has oil leak phenomenon.It is necessary to find out the cause when the oil level indication is not normal. And it is also necessary to pay attention to the path of the oil level indicator and we must ensure that there is no accumulation at the entrance.

Check the sound: Check whether there is abnormal comparison between the electromagnetic sound of the transformer and the previous sound. Staff are usually accustomed to the normal noise of the transformer, and if there is an abnormal sound, they will find it easily.

Check the insulation on the top cover of the transformer: See whether the supporting insulator surface of the outline casing and extraction electric conduction is clean; whether there is a rupture or electric discharge or other defects.

Check the bolt joint that leads the conductor whether has superheating phenomeno: Check the change of the visual temperature wax sheet and the discoloring paint or directly measure it by the infrared thermometer flexibly. When there is a cable terminal box, the oil leakage of the cable head should also be checked.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest electrical power transformer manufacturers, we provide transformer maintenance service, double wound transformer definition, mini substation and etc. Want to know more? Please contact us.

How to Choose A Transformer: Dry Type Transformer and Oil Immersed Power Transformer(2021年08月18日)

zjybelectric — 2021-08-13T15:37:54+0900

https://www.zjyb-electric.com/how-to-choose-a-transformer-dry-type-transformer-and-oil-immersed-power-transformer.html

Transformers are a common and useful device that receives high voltage directly from a power station and converts it to a lower voltage. This enables safe and efficient use of machines and equipment that can handle low voltages in spaces such as offices, transportation hubs, schools and factories to save energy.

Through this process, the transformer generates a large amount of heat that must be dissipated to maintain safe operation. There are two types of transformers currently used in the industry: dry type transformers and oil immersed power transformer. Dry air is used as the cooling medium, and liquid cooling is used as the oil. Although both types have the same end result, it's worth noting that there are many differences between them that will affect the type you choose.

Maintenance: Oil immersed power transformers require more maintenance procedures and must be executed more frequently than dry. Oil needs to be sampled to test for contamination, while dry type transformers are highly resistant to chemical contaminants.

Cost (initial and running): Dry type transformer has significantly higher operating losses compared to oil immersion. Oil filled transformers have a higher standard energy efficiency and therefore have a higher service life than dry type transformers.

Noise: Oil immersed power transformers operate at lower sound levels, so noise pollution is lower than dry.

Recyclability: The life cycle of dry recycling is limited, while the core/coil recovery of petroleum plants is easier. Oil immersed power transformer has superior service life and maintainability, produces less waste, and requires less replacement and labor.

Efficiency: Dry type transformers are larger units with limited voltage and size. If they experience overload, they are more likely to overheat. As a result, they have higher electrical losses and it is more expensive to maintain dry power over time. Oil-cooled units are smaller and more efficient. They have less demand and a smaller environmental footprint.

Voltage Capability: Dry type transformers are designed to handle small to medium MVA and rated voltages, making them ideal for small applications. Oil immersed power transformers can withstand heavier loads, so applications that require higher voltages will require oil units.

Location: The location of the transformer will be the biggest determinant of which type you need. Dry design is used near buildings and buildings simply because they are safer for the environment. Dry type transformers are less flammable and less risky to fire, making them ideal for shopping malls, hospitals, residential areas and other commercial areas. Oil immersed power transformers are used for outdoor installations because there may be oil spills, which pose a fire hazard, but these devices are more environmentally friendly.

Taking into account these variables, petroleum plants appear to be a better choice, with higher energy efficiency, recyclability, low noise pollution, lower operating costs and a small environmental footprint. However, petroleum equipment cannot be used at all under any circumstances. Dry type transformers are the best and multiple must-have option for commercial and indoor operations because they are safer units that operate around people and areas where fire hazards may exist.

YueBian has a variety of high quality and affordable oil immersed power transformers and dry-type power transformer for sale. The main types of transformers incude:
Oil Type Transformer
Amorphous Alloy Transformer
On-Load Regulating Transformer
Dry Distribution Transformer
Mini Substation
All Types of Power Distribution Transformers
Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest dry type transformer company and dry transformer manufacturer, we provide transformer maintenance service, doil immersed distribution transformer, dry type transformer maintenance, electrical transformer and etc. Want to know dry type transformer applications or more? Please contact us.

Electrical Transformer Winding(2021年08月17日)

zjybelectric — 2021-08-13T15:37:28+0900

https://www.zjyb-electric.com/electrical-transformer-winding.html

Electrical Transformer Winding
There must be some insulative gap and heat dissipation channel (oil passage) between high voltage winding and low voltage winding, and between low voltage winding and core column, and insulated with cardboard tube. The size of the insulation distance depends on the voltage level of the winding and the clearance required for the heat dissipation channel. When the low voltage winding is placed near the core column, because the insulation distance between it and the core column is relatively small, the size of the winding can be reduced, and the size of the whole transformer will also shrink at the same time.

The transformer winding is set on the core column of the transformer, the low voltage winding is in the inner layer, and the high voltage winding is set in the outer layer of the low voltage winding to facilitate the insulation. It is easy to be insulated from iron core. The iron core is a grounding electrode, and the iron core stack is capacitive grounding.

The arrangement of the three windings in the inner and outer layers of the core column should consider both the convenience of the insulative treatment and the direction of the power transferring. Considering from insulation, the high-voltage winding should not be placed on the core and should be placed in the outer layer.

When the three winding transformer is used in the boost stage of the generator, the direction of the power transferring is transferred from the low voltage winding to the middle and high voltage side. The low voltage winding is placed in the middle, and the middle voltage winding is arranged in the inner layer. When used for pressure reduction, the direction of power transmission is transferred from the middle side and the low side of the high voltage side. The middle voltage winding is placed in the middle, and the low voltage winding is arranged in the inner layer.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest power transformer manufacturers in china, we provide transformer maintenance service, double wound transformer definition, compact substation and etc. Want to know more? Please contact us.

Efficiency Of Transformer(2021年08月16日)

zjybelectric — 2021-08-13T15:36:40+0900

https://www.zjyb-electric.com/efficiency-of-transformer.html

The efficiency of transformer: At the rated power,the ratio of the output power and input power of the transformer is called the efficiency of the transformer,that is η= x100%. The η in the formula is the efficiency of the transformer; P1 is the input power and the P2 is the output power.When the output power of the transformer（P2） equals the input power（P1）, the efficiency of the transformer is equal to 100% and the transformer will not produce any loss. But in fact this transformer does not exist. When the transformer transmits electrical energy, it always produces loss and this loss mainly includes copper loss and iron loss. Copper loss refers to the loss caused by the resistance of the transformer coil. When the current passes through the coil, it will cause the resistance heating. And part of the electrical energy is changed into heat energy and this part of energy is lost. Because the coil is usually twisted by the insulated copper wire, it is called the copper loss. The iron loss of the transformer consists of two aspects. One is the hysteresis loss. When the alternating current passes through the transformer, the direction and size of the magnetic line of the silicon steel sheet will change along with the transformer, so that the internal molecules of the silicon steel sheet will rub each other and give off heat energy, which will consume part of the electric energy. This is the hysteresis loss. The other is eddy current loss. When the transformer is working, a magnetic line of force will pass through the core, and an induction current will be generated on a plane perpendicular to the magnetic line of force. Because the current itself forms a closed loop and forms a circulation and presents the shape of the whirlpool, it is called a vortex. The existence of the eddy causes the core heating and consume energy and this loss called the eddy current loss. The efficiency of the transformer is closely related to the power level of the transformer. In general, the power is greater, the loss and output power are smaller,and the efficiency is higher. On the other hand, the power is smaller, the efficiency is lower.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest china power transformer manufacturers, we provide transformer maintenance service, double wound transformer definition, oil transformer and etc. Want to know more? Please contact us.

5.
Electrical Transformer Maintenancehttps://www.zjyb-electric.com/electrical-transformer-maintenance.html

Dry Type Transformer Maintenance(2021年08月15日)

zjybelectric — 2021-08-13T15:36:09+0900

https://www.zjyb-electric.com/dry-type-transformer-maintenance.html

Inspect whether the installation of transformer is complete, crooked, and whether there is any local deformation or vibration.

Inspect whether the transformer shell is complete ans the tightness of connections. Make sure the cases are not damaged.

Inspect whether the surroundings of the transformer are clean and water-free.

Check the ventilation equipment in the distribution room or cabinet.

Make sure that there is no overheating phenomenon in every part of the transformer.

Check whether the wire of the transformer is firm, the position is normal, and the insulation distance around the lead is changed.

Make sure that the connection bolts in the transformer is tight, and the transformer has no abnormal noise.

The electrical connection part of the casing and the wiring board shall be tight and free of overheating. Check whether there is any damages to the transformer, and remove the dirt and dust from the rings.

Inspect he technical data and files of the last maintenance.

Understand the operation condition of the transformer.

Comprehensively check the integrity of the transformer.

Check the phase separation plate and the surrounding screen to make sure there is no damages, discoloration, deformation and discharge marks. Any problem should be dealt with once it was found.

Check whether the coil surface is clean or not as well as the conditions of the insulators. Check whether the parts of the transformer are displaced and loose, whether there is dirt and other material clogging the cooling air duct--use soft brush for cleaning if necessary. Check whether the iron core is smooth, whether there is short circuit or discoloration and dislocation situations of the chips. The dirt accumulated at the bottom of the top and bottom yoke of the iron yoke should be cleaned. If the laminated sheet is warped or irregular, use a wooden hammer or a brass hammer to make it smooth.

Check the firmness and insulation performance of the core, top and bottom clamp, square iron and coil pressure plate.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest power transformer supplier china, we provide transformer maintenance service, double wound transformer definition, step down transformer and etc. Want to know more? Please contact us.

Double Wound Transformer Applications(2021年08月14日)

zjybelectric — 2021-08-13T15:35:43+0900

https://www.zjyb-electric.com/double-wound-transformer-applications.html

Double Wound Transformer Applications
Double wound transformer is a common transformer product with main functions include voltage change, impedance transformation, isolation and voltage stabilization. The manufacturing process is different according to different applied occasions (or different purposes). Three wound transformer has three wounds of each phase. When one wound connects to the AC power, the other two wounds can induce different electric potential. The double wound transformers is used for load which requires two different levels of voltage. Usually in power plants and substations, there are three different levels of voltage, so three wound transformer is used widely in the power system.

High, middle and low voltage wounds of each phase are set in the same core column. In order to make the insulation reasonable, usually the high voltage wound is put in the outer layer, with middle and low voltage wounds placed in the inner layer. Based on the high magnetic conductivity of iron materials, most of the flux is confined in the core. Therefore, the two sets of coils can get a high degree of magnetic coupling. Because of the function of voltage boost and buck, the transformer has become one of the most important appendages of modern electric power system. The increasing electricity transmission voltage makes the long-distance transmission more economical. As for step-down transformer, it makes the usage of electricity more diversified. It can be said that if there is no transformers, modern industry is unable to reach such a great level at this time.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest china transformer supplier, we provide double wound transformer operation, double wound transformer definition, distribution transformer and etc. Want to know what is a double wound transformer or more? Please contact us.

Cooling Method of Three-phase Dry Type Power Transformer(2021年08月13日)

zjybelectric — 2021-08-13T15:35:08+0900

https://www.zjyb-electric.com/cooling-method-of-three-phase-dry-type-power-transformer.html

The cooling mode of dry type power transformer is divided into natural air cooling and forced air cooling. In the case of natural air cooling, the transformer can be operated continuously for a long time and the rated capacity under normal use conditions. When forced air cooling, under normal conditions of use, the output capacity of the transformer can be increased by 50%, which is suitable for intermittent overload operation or emergency accident overload operation. Since the load loss and the impedance voltage increase greatly during overload, it is in a non-economic operation state, so it should not be subjected to long-term continuous overload operation.

For natural air-cooled and forced air-cooled transformers, it is necessary to ensure that the transformer room has good ventilation capacity. When the transformer is installed in the basement or in a poorly ventilated environment, a cooling and ventilation device must be added. The fan air cooling system has low noise, uniform cooling and good effect. It is small in size and takes up little space and does not exceed the outline size of the transformer body.

The above is the cooling method of three-phase
dry type power transformer
(natural air cooling and forced air cooling). For more information, please pay attention to the official website of YueBian.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest oil immersed transformer manufacturer, we provide air cooled transformer dry type, three phase dry type transformer, power transformer and etc. Want to know more? Please contact us.

10kv, 35kv Three Phase on Load Tap Changer Transformer(2021年06月17日)

zjybelectric — 2021-06-10T12:21:59+0900

https://www.zjyb-electric.com/blog/three-phase-on-load-tap-changer-transformer.html

1. Brief Description
SZ11 series on-load-tap-changing oil-immersed transformer is an upgraded product developed based on S11 series oil-immersed transformer. The voltage fluctuation and load change of power grid lead to fluctuation of output voltage of transformer during the running. If the voltage is too high or too low, the electric equipment will fail to work normally and even be burnt, and the insulation and efficiency of the transformer will be influenced. To ensure the variation of the output voltage within a reasonable range, voltage regulation is necessary. The product may operate the on-load tap changer manually or automatically to regulate the voltage when it is loaded, or realize remote voltage control through a controller.

2. Application Scope
The product applies to the users who require stable voltage and the voltage fluctuation of power grid is big.

3. Model Description
4. Standards
GB 1094.1, GB 1094.2, GB 1094.3, GB 1094.5,
IEC 60076-1:2000,IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,GB/T 6451,GB/T 20052,etc

GB 1094.1, GB 1094.2, GB 1094.3, GB 1094.5,
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451, GB/T 20052, etc

Contact Information:
Name: Rayzen He(Mr.)
Mobile: +86 13506557391

Yuebian Electric Co., Ltd.
Add: Jiedai Industrial Zone,
Yueqing City,
Guangdong Province,
China
Web: www.zjyb-electric.com
Tel: 86-577-62566535
Fax: 86-577-62513338
Zip Code: 325600

Yuebian Electric Co.,Ltd, is one of professional power transformer manufacturers in china. We provide Dry Type Transformer on load tap changing transformer and so on. Want to know about mini substation? Please contact us.

The Basic Components of The Transformer(2021年06月16日)

zjybelectric — 2021-06-10T12:21:26+0900

https://www.zjyb-electric.com/blog/the-basic-components-of-the-transformer.html

Iron legs and cross piece into two parts, legs sheathed with windings; cross-piece is closed magnetic purposes.

The basic form of the core structure determined formula shell two.

2. Winding

It is part of the transformer winding circuit, which is double insulated flat wire or silk bag enamelled round wire wound into.

Yuebian Electric Co.,Ltd, is one of professional electrical power transformer manufacturers. We provide Mini Substation, basic components of a transformer, dry type transformer and so on. Want to know more? Please contact us.

Power Distribution Transformer Oil Immersed Type Transformer(2021年06月15日)

zjybelectric — 2021-06-10T12:20:58+0900

https://www.zjyb-electric.com/blog/power-distribution-transformer-oil-immersed-type-t.html

Summary

2. Application Scope
The product applies to power, petrochemical, coal, building material, metallurgical and textile industries.

3. Model Description
4. Standards
GB1094.1, GB1094.2, GB1094.3, GB1094.5
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451, etc

Company Profile:

If you are interested in our products, feel free to contact me!

Contact Information:
Name: Rayzen He(Mr.)
Mobile: +86 13506557391

Yuebian Electric Co., Ltd.
Add: Jiedai Industrial Zone,
Yueqing City,
Guangdong Province,
China
Web: www.zjyb-electric.com
Tel: 86-577-62566535
Fax: 86-577-62513338
Zip Code: 325600

Yuebian Electric Co.,Ltd, is one of professional china power transformer manufacturers. We provide Dry Type Transformer, Mini Substation, electrical distribution transformer, oil immersed transformer and so on. Want to know more? Please contact us.

High Overload Oil-Immersed Amorphous Alloy Transformer(2021年06月14日)

zjybelectric — 2021-06-10T12:20:17+0900

https://www.zjyb-electric.com/blog/oil-immersed-amorphous-alloy-transformer.html

High Overload Oil-Immersed Amorphous Alloy Transformer

High-overload Oil-immersed Transformer

To address such situation, the Company develops the high-overload oil-immersed transformer. The insulating material of this new transformer reaches the standard of insulation class B and higher. On the basis of normal temperature rise requirements, this new transformer satisfies staged continuous operation for 6h at 1.5 multiples of rated capacity (3h respectively at load rising and dropping stages), 3h at 1.75 multiples of rated capacity (1.5h respectively at load rising and dropping stages), and 1h at 2.0 multiples of rated capacity, without affecting the normal service life of transformer. The temperature rise of high-overload distribution transformer satisfies class-F insulation limit value. Meanwhile, according to the core material, this new transformer can be classified into the high-overload oil-immersed transformer with amorphous alloy core and the high-overload oil-immersed transformer with the core made of silicon steel sheet.
2. Application Scope
The product has been widely applied in new and reconstruction projects of urban and rural power grids, and is especially suitable for the areas where the seasonable fluctuation of power consumption is big, the difference of power consumption at day and night is big and the daily maintenance is difficult. As the transformer adopts fully sealed structure and avoids contact with the air, it may run in the humid environment and is the ideal power distribution equipment for urban and rural power distribution network.

3.Model Description
4. Standards:
GB1094.1, GB1094.2, GB1094.3, GB1094.5,
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451,etc

GB1094.1, GB1094.2, GB1094.3, GB1094.5,
IEC 60076-1:2000, IEC 60076-2:1993, IEC 60076-3:2000, IEC 60076-5:2006,
GB/T 6451, etc

If you are interested in our products, contact us now!

Yuebian Electric Co.,Ltd, is a professional dry transformer manufacturer. We provide Dry Type Transformer, Mini Substation, electrical transformer and so on. Want to know more? Please contact us.

Advantages and Disadvantages of Dry Type Distribution Transformer and Oil-immersed Transformer(2021年06月13日)

zjybelectric — 2021-06-10T12:19:47+0900

https://www.zjyb-electric.com/blog/advantages-and-disadvantages-of-dry-type-distribution-transformer-and-oil-immersed-transformer-and-their-differences.html

Yuebian Electric Co.,Ltd, is a professional dry type transformer supplier. We provide Dry Type Transformer, Mini Substation and so on. Want to know about oil immersed transformer price? Please contact us.

Application Of Single Phase Transformer(2021年06月12日)

zjybelectric — 2021-06-10T12:19:20+0900

https://www.zjyb-electric.com/application-of-single-phase-transformer.html

Application Of Single Phase Transformer

Yuebian Electric Co.,Ltd, is a professional power transformer supplier china. We provide Dry Type Transformer, Mini Substation and so on. Want to know about application of three phase transformer? Please contact us.

Application Of Instrument Transformer(2021年06月11日)

zjybelectric — 2021-06-10T12:18:53+0900

https://www.zjyb-electric.com/application-of-instrument-transformer.html

Application Of Instrument Transformer

The installation site of the protection equipment for current transformer shall be the vacancies uncovered by the main protection equipment.

Yuebian Electric Co.,Ltd, is a professional china transformer supplier. We provide Dry Type Transformer, Mini Substation, step down transformer and so on. Want to know more? Please contact us.

Application Of Core Type Transformer(2021年06月10日)

zjybelectric — 2021-06-10T12:18:11+0900

https://www.zjyb-electric.com/application-of-core-type-transformer.html

Application Of Core Type Transformer
Core type transformer: the power transformer is divided into core structure and shell structure according to the structure of iron core, and the core of core structure is surrounded by winding.

Yuebian Electric Co.,Ltd, is a professional oil immersed transformer manufacturer. We provide Dry Type Transformer, Mini Substation and so on. Want to know about core type transformer advantages? Please contact us.

Three Phase Transformer Winding(2021年)

zjybelectric — 2021-04-21T17:45:01+0900

https://www.zjyb-electric.com/three-phase-transformer-winding.html

The most commonly used in the power system is the three phase transformer winding. It is more economic, less area, more convenient for maintenance and management to use a 3 phase transformer winding to connect three power transmission systems of different voltages than using two ordinary transformers. The three phase three winding transformer is often to use the connection method of Y-Y-△, namely that both original and secondary winding use Y connection method, and the third winding uses △. △ method itself is a closed loop which permits third harmonic current of the same phase to pass, so that third harmonic current does not appear in the original and secondary winding of the Y connect method. In that way, it also provides a neutral point for both the original and the secondary side. In the long distance transmission system, the third winding can also connect with a synchronous condenser to improve the power factor of line.

The capacity of the three phase transformer winding is the largest capacity among the three winding.

Multi-winding transformers are often used in electronic equipment, such as power transformer. 1 and 1┡ are two same original winding. They can be connected in series or in parallel to match two different supply voltages. 2、3、4、4┡ are secondary winding which can output different voltages to meet different needs. It can also guarantee the isolation requirement of each circuit.

Formula is as follows :

n13=N1/N3=E1/E3≈U1/U3
n23=N2/N3=E2/E3≈U2/U3

The capacity of three phase transformer winding is the largest capacity in the three winding.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest power transformer suppliers in China. We provide step down transformer, power transformer, distribution transformer and etc. Want to know more? Please contact us.

Three Phase Transformer Connections(2021年)

zjybelectric — 2021-04-21T17:44:16+0900

https://www.zjyb-electric.com/three-phase-transformer-connections.html
Three Phase Transformer Connections
In order to show the phase relation of the coils voltage on both sides , the connection mode of the three-phase transformer is divided into several groups which are called the connection group. Among the Three phase power transformer, the phase voltage ratio of the primary and secondary power transformers is fixed and equal to the ratio of the number of turns. According to the way that the coil is connected, it can be divided into twelve kinds of connection groups: 1--12 points.

The connection group of three-phase transformer is divided into 12 kinds, including 6 kinds of single arrays and 6 double arrays. When primary side coil and second side coil connects differently, it is a single array, including Y/Δ-1, 3, 5, 7, 9, 11. When primary side coil and the second side coil connection is consistent, such as Y-Y, Δ-Δ, it's a double array, including: Y/y-2,4,6,8,10,12. In China, the connections of Y shape to Y shape are 12 point wiring. The connection of Y shape to Δ is 11 points wiring, except other special cases.

The groups of different transformers generally adopt the clock representation method. Because the phase difference between the line voltage corresponding to the one and two side of the transformer is integer multiples of 30 degrees. It coincides with the angle among the clock hours. The clockwise moves exactly 30 degrees an hour. Therefore, it can be a very vivid description of this problem with clock representation. In the method, use the primary side line voltage vector as the long hand of a clock and fix it on the 12 points. And then use the line voltage vector corresponding to the two side as the short hand of a clock, and take the point which is pointed by the short hand as the group number of wiring group.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest three phase transformer suppliers and power distribution transformer manufacturers in China. We provide distribution transformer connections, step down transformer, power transformer, distribution transformer and etc. Want to know more? Please contact us.

The Difference between Dry Type Transformer and Oil Filled Transformer(2021年)

zjybelectric — 2021-04-21T17:43:30+0900

https://www.zjyb-electric.com/the-difference-between-dry-type-transformer-and-oil-filled-transformer.html

Of course, the same is true that the power transformer will have a core for the magnetic circuit and a winding for the circuit. The biggest difference is in "oil filled" and "dry". That is to say, the cooling medium of the two is different. The former uses transformer oil (and of course other oils such as beta oil) as the cooling and insulating medium, and the latter uses air or other gases such as SF6 as the cooling medium. Oil filled transformer is to place the body consisting of iron core and winding in a fuel tank filled with transformer oil. Dry type transformer often encloses the core and windings with epoxy resin. There is also a kind of non-encapsulated type that is used nowadays. The windings are impregnated with special insulating paper with special insulating paper to prevent the windings or core from getting wet. (Because the two are derived from different categories due to different methods of process, use, and structure, we are narrowly speaking.)

In terms of production and usage, the current dry type transformer’s voltage rating is only 35kV. The capacity is small compared to oil filled transformer, about 2500kVA. Moreover, since the dry type transformer manufacturing process is complicated and costly with respect to the oil filled transformer of the same voltage level and the same capacity, the oil filled transformer is still much more in terms of the amount of oil. However, due to the environmental protection of dry change, flame retardant, impact resistance and so on, it is often used in indoor and other high-demand power supply and distribution sites, such as hotels, office buildings, high-rise buildings and so on. If you are just a transformer user, it should be enough to understand this.

Dry type distribution transformer and oil filled transformers have their own advantages and disadvantages. Oil filled transformers are low in cost and easy to maintain, but they are flammable and explosive. Dry type transformers can be installed in the center of the load due to their good fire resistance to reduce voltage loss and power loss. However, dry type transformers are expensive, bulky, moisture-proof and dust-proof, and have high noise.

Oil filled transformers gradually withdrew from the market and dry type transformers were adopted. The dry type transformer can be disassembled, transported and drained, cleaned, easy to maintain, installed without a machine base, and without oil leakage pool.

The two are better distinguished from the outside.
The biggest difference between oil filled transformers and dry type transformers is whether there is "oil". Since the oil is liquid and has fluidity, the oil-immersed transformer must have a casing. Inside the casing is transformer oil, the oil is immersed in the coil of the transformer, and the coil of the transformer is not visible from the outside. The dry type transformer has no oil, so it does not need the outer casing, and the coil of the transformer can be directly seen. Another feature is that there is an oil pillow on the oil filled transformer, and the transformer oil is stored inside, but now the new oil filled transformer also has no oil pillow.

In order to facilitate heat dissipation, that is, for the convenience of the flow of internal insulating oil, a heat sink is designed outside the oil filled transformer, just like a heat sink. The dry type transformer does not have this radiator, and the heat is cooled by the fan below the transformer coil. The fan is a bit like an indoor unit for home air conditioning.

Due to the need for fire protection, oil filled transformers are typically installed indoors or outdoors in separate transformers. The dry type transformer is definitely installed indoors, and is usually installed in a low-voltage power distribution room and installed side by side with the low-voltage power distribution cabinet.

YueBian is one of
oil filled transformer manufacturers
. Welcome to buy our products.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest dry type transformer manufacturer in China. We provide outdoor dry type transformer, step down transformer, oil transformer, distribution transformer and etc. Want to know more? Please contact us.

Structure and Performance Analysis of Three-phase Three-column Amorphous Alloy Dry Type Transformer(2021年)

zjybelectric — 2021-04-21T17:42:28+0900

https://www.zjyb-electric.com/structure-and-performance-analysis-of-three-phase-three-column-amorphous-alloy-dry-type-transformer.html

Amorphous alloy dry type transformer is a new type of energy-saving transformer made of new magnetic conductive material (amorphous alloy). Compared with the transformer with silicon steel sheet as the core, the no-load loss is reduced by more than 70%, and the no-load current is reduced by about 80%. It is a distribution transformer with ideal energy saving effect, especially suitable for rural power grids and places with low load rates in developing regions.

Amorphous alloy materials and their dry-type transformer characteristics
The windings and clamping devices of amorphous alloy epoxy cast dry type transformers are basically the same as ordinary epoxy cast dry type transformers, but the core materials used are quite different. A new high-tech product called amorphous alloy was chosen. The amorphous alloy is a very thin magnetic material having a thickness of about 0.03 mm. It is a strip of sheet material cast from a certain proportion of alloy material using ultra-quenching technology (cooling rate 107/s) through a cooling float. Compared with cold-rolled silicon steel sheets, amorphous alloy materials have five advantages, but there are also five disadvantages. These shortcomings bring a lot of difficulties to the design and manufacture of the transformer.

The advantages of the five aspects are reflected in:
(1) It uses an isotropic soft magnetic material;
(2) The loss is very low, about 30% of the silicon steel sheet;
(3) The resistivity is about 3 times that of the silicon steel sheet;
(4) The subsequent process is convenient to process (the subsequent process can obtain the required magnetic properties);
(5) The manufacturing process is environmentally friendly.

The five disadvantages are:
(1) The thickness is very thin, the surface of the material is not flat, and the core filling factor is about 0.86;
(2) The hardness is much larger than that of silicon steel sheet, which brings inconvenience to cutting and processing;
(3) It must be annealed;
(4) The material is fragile after annealing;
(5) The influence of mechanical stress on its performance is very large.

Due to the formation of the amorphous alloy strip, the cross section of the core is generally rectangular and the windings are also rectangular. There is a break in one yoke, open the break set winding, and then close the break. The core adopts a new three-phase three-column structure. Due to the advantages of flame retardant, high reliability and maintenance-free, amorphous alloy dry type transformers have broad development prospects in the power distribution market.

YueBian Company has
dry type transformer for sale
. Welcome to buy.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest distribution transformer manufacturers in China. We provide step down transformer, oil transformer, distribution transformer and etc. Want to know more? Please contact us.

Step Up Transformer Efficiency(2021年)

zjybelectric — 2021-04-21T17:37:14+0900

https://www.zjyb-electric.com/step-up-transformer-efficiency.html
Step Up Transformer Efficiency

The step up transformer is a device that transforms low AC voltage, large current and small impedance into high AC voltage, small current and large impedance. When there is alternating current through the primary coil, the core (or magnetic core) will be generated in the AC flux, the secondary coil induces a voltage (or current). The input of the transformer must be the alternating current, and its output voltage is proportional to the number of turns of the output or input coil. If a battery is used because it is a DC, the switch circuit must be added to the input circuit to turn it into a changing voltage. In this way, the alternating high voltage power can be obtained at the output end.

Formula and description: the number of the winding of the two lines of transformer is N1 and N2, N1 is primary and N2 is secondary. An induction electromotive force is generated at both ends of the secondary coil by adding an AC voltage on the primary coil. When the N2 is greater than N1, its induced electromotive force is higher than the primary voltage, which is called the step up transformer.

Yuebian Electric Co.,Ltd, approved by ISO9001, is one of the largest oil filled transformer manufacturers in China. We provide step down transformer, oil transformer, distribution transformer and etc. Want to know more? Please contact us.

Power Transformer Connection(2020年06月13日)

zjybelectric — 2020-06-05T11:08:02+0900

http://www.zjyb-electric.com/power-transformer-connection.html

In this is paper, we will mainly talk about the power transformer connection. The two terminals are connected to the socket of 220-volt power supply. The three lines are the output of the buck. The middle line and the two sides of the line are the same voltage. If the output of your transformer is double 12 volts, then the three middle lines and the next two will be double 12 volts.

There are many kinds of controlling transformers. There are usually BK-50~300 type low voltage power supply for machine tool control and lighting circuit, and larger power (BK-400~1000) for power supply of safety lighting.

The primary (high voltage side) of the transformer usually has two kinds of power supply voltage input for `~220 V and ~380 V. The voltage of the output end of the secondary (low voltage side) has a lot, which are 6.3 V, 12 V, 15 V, 24 V, 36 V and so on. 6.3 V is commonly used in indicator light power supply, 12 V, 24 V are used for intermediate relay power supply and controlling circuit power supply. 36 V is often used for lighting power supply.

Wiring: the zero terminal of the high voltage side is the public end, and when the power supply is 220 V, it is connected to the two terminals of 0 and ~ 220 V. When ~380 V is supplied, two terminals are connected to 0 and ~380 V. The machine tools use 380 V, with the same power, the power supply voltage is high, the primary current is smaller, so that the choice of the wire is smaller, according to this formula I = P/U. The end of each end shall not be faulted according to the marked voltage level. After the fault, the output voltage will not meet the requirement. If the low voltage is connected with high voltage, the transformer will be burned.

Overhead Transformer Connections(2020年06月12日)

zjybelectric — 2020-06-05T11:07:38+0900

http://www.zjyb-electric.com/overhead-transformer-connections.html

In this paper, we will mainly talk about the overhead transformer connections, there are some points as follows.
1. The distance between the wire of distributing line and pole or framework: at least 0.3m per 10kV and 0.1m per 0.4kV.

2. The net distance between lead wire, downlead in each phase and the lead wire or downlead of next phase: at least 0.3m per 10kV and 0.1m per 0.4kV.

5. The mounting height of pole distribution transformers and switch boxes should not lower than 3m.

6. Under the premise of satisfying the requirement of phase, the drop-out fuse should be installed on the highway side.

7.Before installing equipment, the mounting hole size should be checked carefully. If it doesn't match the installation drawing, you should contact with the design unit in time to let the problem properly solved.

Oil Filled Transformer Maintenance(2020年06月11日)

zjybelectric — 2020-06-05T11:07:11+0900

http://www.zjyb-electric.com/oil-filled-transformer-maintenance.html

In this paper, we will mainly talk about the oil filled transformer maintenance.
Overhaul projects:

Removal of the hanging core or hanging cover for each accessory.

Maintenance of winding, lead devices and other equipment.

Maintenance of tap chargers.

Overhaul of iron core, core piercing screw, yoke beam, nail and ground piece.

Cleaning and maintenance of oil tank, casing, radiator, safe airway and expansion tank.

Testing of transformer equipment such as oil purifier, respirator, expansion tank capsule and releaser.

Inspections and maintenance of gas relay and thermometer.

Drying of the transformer when necessary.

Replacement of all seal pads and leaking test for components.

Inspections and cleaning for the air porcelain.

Oil treatment of transformers.

Regular inspections and test.

Minor repairs:

Clean the shells.

Check and eliminate defects that have been found.

Clean the casing and tighten the wiring bolts of each casing.

Inspect expansion tank and oil level gauge.

Check the respirator and oil purifier, and replace the silicone when necessary.

Repair the submersible pump and the cooling fan of coolers.

Check the connection of the joints, valves and seal pads.

Repair gas relay and thermometer.

Check and debug the voltage regulator, measuring device and control box.

Analyze samples, and adjust oil level of casings and the transformer.

Clean and paint oil tank as well as accessories.

Conduct measurement and test according to regulations.

Clean the air porcelain.

High-voltage test.

As one of the moat famous oil filled transformer manufacturers in China, our product has good quality and competitive price, if you have any interests, please contact us.

How to Choose A Transformer: Dry Type Transformer and Oil Immersed Power Transformer(2020年06月10日)

zjybelectric — 2020-06-05T11:06:45+0900

http://www.zjyb-electric.com/how-to-choose-a-transformer-dry-type-transformer-and-oil-immersed-power-transformer.html

Through this process, the transformer generates a large amount of heat that must be dissipated to maintain safe operation. There are two types of transformers currently used in the industry: dry type transformer and oil immersed power transformer. Dry air is used as the cooling medium, and liquid cooling is used as the oil. Although both types have the same end result, it's worth noting that there are many differences between them that will affect the type you choose.

Noise: Oil immersed power transformers operate at lower sound levels, so noise pollution is lower than dry.

YueBian has oil immersed power transformer for sale and dry-type power transformer for sale, which are available upon request.

Dry Type Transformer Maintenance(2020年06月09日)

zjybelectric — 2020-06-05T11:06:17+0900

http://www.zjyb-electric.com/dry-type-transformer-maintenance.html

In this paper, we will mainly talk about the dry type transformer maintenance. Inspect whether the installation of transformer is complete, crooked, and whether there is any local deformation or vibration.

Inspect whether the transformer shell is complete ans the tightness of connections. Make sure the cases are not damaged.

Inspect whether the surroundings of the transformer are clean and water-free.

Check the ventilation equipment in the distribution room or cabinet.

Make sure that there is no overheating phenomenon in every part of the transformer.

Check whether the wire of the transformer is firm, the position is normal, and the insulation distance around the lead is changed.

Make sure that the connection bolts in the transformer is tight, and the transformer has no abnormal noise.

Inspect he technical data and files of the last maintenance.

Understand the operation condition of the transformer.

Comprehensively check the integrity of the transformer.

Check the phase separation plate and the surrounding screen to make sure there is no damages, discoloration, deformation and discharge marks. Any problem should be dealt with once it was found.

Check the firmness and insulation performance of the core, top and bottom clamp, square iron and coil pressure plate.

Double Wound Transformer Applications(2020年06月08日)

zjybelectric — 2020-06-05T11:05:49+0900

http://www.zjyb-electric.com/double-wound-transformer-applications.html

Double winding transformer is a common transformer product with main functions include voltage change, impedance transformation, isolation and voltage stabilization. The manufacturing process is different according to different applied occasions (or different purposes). Three wound transformer has three wounds of each phase. When one wound connects to the AC power, the other two wounds can induce different electric potential. The transformer is used for load which requires two different levels of voltage. Usually in power plants and substations, there are three different levels of voltage, so three wound transformer is used widely in the power system.

The Basic Components of The Transformer(2020年06月07日)

zjybelectric — 2020-06-05T11:05:17+0900

http://www.zjyb-electric.com/blog/the-basic-components-of-the-transformer.html

1. Core

Core transformer in the main part of the magnetic circuit. Usually basic components of a transformer consists of a high silicon content, thickness, respectively 0.35mm \ 0.3mm \ 0.27mm, the surface coated with insulating paint hot or cold rolled silicon steel sheet piled up.

Iron legs and cross piece into two parts, legs sheathed with windings; cross-piece is closed magnetic purposes.

The basic form of the core structure determined formula shell two.

2. Winding

It is part of the transformer winding circuit, which is double insulated flat wire or silk bag enamelled round wire wound into.

Application Of Single Phase Transformer(2020年06月06日)

zjybelectric — 2020-06-05T11:04:41+0900

http://www.zjyb-electric.com/application-of-single-phase-transformer.html

This is passage is mainly talk about the application of three phase transformer. After the transformation of urban and rural power grid to a certain extent, the share of line loss will be greatly reduced, and the loss of distribution transformer will occupy the main position of network loss. Only when the loss of iron core is greatly reduced can the power loss of the power grid be further reduced. Therefore, the reel core and amorphous core single-phase transformer have great potential for development. At present, the three-phase transformer and the three-phase concentrated power supply system still dominates, and single-phase transformer and the single-phase power supply system is just the supplement. In the practical application of transformer, we should make full use of the advantages and characteristics both of three-phase transformer and single-phase transformer, and choose suitable transformer varieties according to the power load, and configure the power supply with the economic power supply radius.

Application Of Instrument Transformer(2020年06月05日)

zjybelectric — 2020-06-05T11:03:56+0900

http://www.zjyb-electric.com/application-of-instrument-transformer.html

This passage is mainly talk about the application of instrument transformer. The wiring of the instrument transformer shall comply with the connection principle: The first winding should be connected in series with the circuit under test while the second winding in series with all the instrument loads.

The installation site of the protection equipment for current transformer shall be the vacancies uncovered by the main protection equipment.