Transformers play a crucial role in electrical systems, and their functions mainly include the following:

1、 Transform function

Transformers can convert high voltage and high current of a primary system into low voltage and low current, and are specified as standard values. Specifically:

Voltage Transformer: Convert the high voltage of the system (such as 10kV, 35kV, etc.) into a standard low voltage (usually 100V).

Current Transformer: Convert high current in high-voltage systems or high current in low-voltage systems into standard low current (usually 5A or 1A).

This transformation function enables standardization and miniaturization of measuring instruments and protective devices, and facilitates centralized control and remote operation.

2、 Isolation and protection functions

Transformers can also isolate primary equipment from secondary equipment, which has two main meanings:

Improving safety: Transformers isolate high voltage and high current systems from low voltage and low current systems, thereby enhancing the safety and reliability of circuit operation and ensuring personal safety.

Simplified wiring: Due to the electrical isolation achieved by the transformer, the secondary circuit can be wired more flexibly, and installation and maintenance are also more convenient, without the need to disconnect the operation of the primary equipment.

3、 Expand the application scope of instruments and relays

Transformers enable the current or voltage on the secondary side to become a unified standard value, which is beneficial for the standardization of instruments and relays. At the same time, by changing the transformation ratio of the transformer, it can reflect the voltage and current values of the main circuit of any size, thereby expanding the application range of instruments and relays.

4、 Cooperate with measurement and protection equipment

Transformers can also be used in conjunction with electrical instruments to measure parameters such as current, voltage, and electrical energy of circuits and equipment; Cooperate with relay protection and automatic devices to provide overcurrent, overvoltage, overload, and single-phase grounding protection for systems and equipment.

In summary, transformers are indispensable and important components in electrical systems. They ensure the safe, reliable, and efficient operation of electrical systems through functions such as transformation, isolation, protection, and coordinated measurement protection.