Monitoring Circuit for Closing Circuit of Circuit Breaker Mechanism Against Tripping
When the circuit breaker mechanism prevents tripping,the monitoring circuit of the closing circuit must be moved to the circuit breaker mechanism box for monitoring.However,this can cause the monitored part of the closing circuit to be shortened.When the circuit breaker is in the opening position,if the shortened closing circuit breaks,the device cannot report a control circuit break signal,and maintenance and operation personnel cannot detect the circuit break in the first place,Only when the circuit breaker is closed for power transmission can it be found that the circuit breaker cannot be closed,increasing power outage time and grid operation risk.The first trip circuit monitoring relay 1HWJ normally closed contact 1HWJ1 and the second trip circuit monitoring relay 2HWJ normally closed contact 2HWJ1 are connected in series and connected to the closing circuit monitoring circuit to reliably monitor the closing circuit.
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