Control loop of Circuit breaker
1, should be able to monitor the control loop protection device and its jump, closing circuit integrity, in order to ensure the normal operation of the circuit breaker;
2, should be able to indicate the circuit breaker normal closing and sub-gate position status, and in the automatic closing and automatic tripping when there is a clear indication signal;
3, closing and tripping after completion, should be able to make the command pulse release, that is, can cut off the closing or tripping power supply;
4, in the absence of mechanical anti-jump device, should be installed electrical anti-jump device;
5, Circuit breaker accident tripping signal circuit, should be in accordance with the "no correspondence principle" wiring;
6, the possibility of abnormal working conditions or failure of the equipment, should be installed with a warning signal;
7, spring operating mechanism, manual operating mechanism of the power supply can be DC or AC, electromagnetic operating mechanism power requirements with DC.