During the use of a circuit breaker, adjusting the opening and closing speeds properly is a reliable condition to ensure its operation. Correct testing is a direct method to verify whether the speed i

The basic requirements for high-voltage circuit breakers are as follows:

Low voltage circuit breakers, also known as air switches or automatic switches, are equivalent to a combination of knife switches, fuses, thermal relays, overcurrent relays, and undervoltage relays.

(1) The rated current of the circuit breaker is determined by the calculated current of the line.
(2) The shortcircuit setting current of the circuit breaker should avoid the normal working starting