Electromagnetic Actuator Impact Survey on the Opening Time of High-Voltage Circuit Breaker

This paper presents research on the influence of DC electromagnetic actuator on the opening time of high-voltage circuit breaker. The opening time of a high-voltage circuit breaker is crucial for the electrodynamic stress of electrical equipment due to a short circuit current. Different positions of DC electromagnetic actuator, with known force characteristics, displacement velocity, and time response, are built into the motor-spring type operating mechanism of high-voltage circuit breaker, after which the circuit breaker's opening time is recorded in the laboratory.