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1. How does a power transformer transform voltage?

The transformer is made according to electromagnetic induction. It consists of an iron core stacked with silicon steel sheets (or silicon steel sheets) and two sets of coils wound on the iron core. The iron core and the coils are insulated from each other without any electrical connection.

It has been proved by the theory that the voltage ratio of the primary coil to the secondary coil of the transformer and the turns ratio of the primary coil to the secondary coil is related. There are fewer secondary coils than primary coils, which is a step-down transformer. Otherwise, it is a step-up transformer.

2. What are the components of the power transformer components?

Transformer components are mainly composed of iron core and coil, in addition to the oil tank, oil pillow, insulating sleeve, and tap opening.

3. What is the role of power transformer oil?

The functions of transformer oil are insulation and heat dissipation.

4. How is the voltage regulator adjusted?

The structure of the voltage regulator is the same as the autotransformer, and the iron core is made into a ring coil and wound on the ring core.

The secondary coil tap uses a sliding brush contact to make the contact slide in a ring along the surface of the coil to achieve a smooth voltage regulation.

5. What is the voltage change rate of the transformer?

The voltage change rate of the voltage regulator is one of the main performance indexes of the transformer. When the transformer supplies power to the load, the voltage at the load end of the transformer will inevitably drop. The ratio of the reduced voltage value to the rated voltage value is the rate of voltage change.

6. How to ensure that the transformer has a rated voltage output?

Too high or too low voltage will affect the normal operation and service life of the transformer, so the voltage must be adjusted.

The method of voltage regulation is to draw several taps in the primary coil to connect to the tap opening. The tap opening changes the number of turns of the coil by rotating the contacts. As long as the position of the tap changer is turned, the required rated voltage value can be obtained. It should be noted that voltage regulation should usually be performed after the load connected to the transformer is cut off.

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