How much do you know about high voltage transformers?

The electricity used now is generally produced from thermal power plants or hydroelectric power plants. When it was first produced, the voltage was very high. If we want to use them in our lives, we have to reduce their voltage and convert them to our The electrical appliances are suitable for the voltage so that we can use them normally. And our method is the transformer we use, let us get to know the high-voltage transformer together!

S11 S11M 10KV oil high voltage transformer

What is a high-voltage transformer?
Refers to the general term for transformers above 600V, usually 10-1000kV. It is an electronic product invented in modern society to meet the electricity demand of the majority of electrical products. Its basic function is to convert a relatively high voltage into a voltage suitable for general electrical products.

What are the functions of high-voltage transformers?
(1) Impedance transformation function: increase the system impedance and make it easy to cooperate with protection devices;
(2) Reduce short-circuit current: When a short-circuit accident occurs on the load side, limit the short-circuit current of the system.
(3) Anti-interference effect of high-voltage transformer: For example, after passing through the isolation transformer of Y/△ connection, it can prevent the transmission of some harmonics;
(4) The function of preventing system grounding: When single-phase grounding occurs on the load side of the isolation transformer, it will not cause single-phase grounding of the entire system (the part above the isolation transformer);
(5) The role of stabilizing the system voltage: For example, when starting heavy load equipment, reduce the impact on the system voltage; power distribution cabinets, high-voltage power distribution cabinets, low-voltage power distribution cabinets, high-low voltage power distribution Box-type transformer.

How does a high-voltage transformer work?
High-voltage transformers are generally suitable for everyday common electronic products, and they work on the principle of electromagnetic induction. When an alternating current flows through the high-grade coil, an alternating magnetic flux is generated in the iron core (or magnetic core), which makes the secondary coil feel a voltage (or current). A high-voltage transformer can be composed of an iron core (or magnetic core) and a coil. The coil has two windings or passes through two basic windings. The winding connected to the power supply inside is called an advanced research coil, and the other windings are called secondary coils.

Maintenance matters of high voltage transformer
(1) The transformer can be disconnected first, then the control power supply of the transformer can be removed, and a sign of "no switching on" can be hung at the switch.
(2) Disconnect the transformer circuit breaker, fully discharge the transformer, lock the high-voltage cabinet, and then hang the sign of "no closing" on the switch.
(3) Clean the transformer bushing and shell, check if the shell and gasket are broken, and if the cable is deformed, it should be replaced.
(4) Check whether the transformer busbar is clean, and apply electric compound grease on the oxide layer of the contact surface.
(5) Check whether the transformer is well grounded, whether it is corroded, etc.
(6) Check if the pins, grounding screws, and lead terminals of the transformer are loose. If it is loose, it should be tightened in time.
(7) Clean up the dust on the transformer in time, and pay attention to check whether the ventilation system is in good condition.
(8) Check that the transformer disconnects the grounding switch on the high-voltage side, and use a 2500V shaker to measure the insulation resistance.
(9) Disconnect the transformer, check the control line of the transformer, and turn off the circuit breaker on the high-voltage side of the transformer after confirmation.

Editor's summary: Here is an introduction to "what is a high-voltage transformer", "functions of a high-voltage transformer", "how a high-voltage transformer works" and "maintenance items for a high-voltage transformer". After reading it, I hope it helps you. If you want to know more relevant knowledge, you can follow us, and will continue to update you.