What is the main function of high-voltage circuit breakers?

The main functions of high-voltage circuit breakers are:

① Can cut off or close the no-load current of high-voltage lines.

② Can cut off and close the load current of high-voltage lines.

③ Able to cut off and close the fault current of high-voltage lines.

④ In conjunction with relay protection, faults can be quickly removed to ensure safe operation of the system.