Cause Analysis and Improvement Method for Burning of Circuit Breaker Break-Open Coil
In view of the phenomenon of coil burning during break-open operation of circuit breakers,starting with circuit breakers'mechanism and control circuit working principle,it is analyzed that the root cause for burning of break-open coils is long-time charging operation.Several corresponding improvement methods are proposed.After comparison,it is determined that non-contact measurement is the best method,which can monitor and evaluate the operation of break-open coil without disassembling the mechanism device and without changing the control loop,and can enable real-time protec-tion and advance prediction the coils.
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