1, should be able to monitor the control loop protection device and its jumping, closing circuit integrity, in order to ensure the normal work of the circuit breaker;
2, should be able to indicate the circuit breaker normal closing and the position of the gate, 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 can cut off or tripping the power supply;
4, in the absence of mechanical anti-jumping device, should be installed electrical anti-jumping device;
5, Circuit breaker accident trip signal circuit, should press "does not correspond to the principle of" wiring;
6, for the possibility of abnormal working condition or failure of equipment, should be equipped with a warning signal; 7, the spring operating mechanism, manual operation of the power supply can be DC or AC, electromagnetic operating mechanism of the power requirements with DC.