Research on Single-phase Grounding Fault Handling True Test of Primary and Secondary Integration Circuit Breaker

At present, the accuracy rate of single-phase grounding fault disposal of column circuit breaker with primary and secondary integration is low, so it is urgent to carry out assessment and verification of single-phase grounding fault disposal. The single-phase grounding test in the operation site is subject to the influence of safety risk and user power supply reliability. It is not easy to carry out many times. In this paper, through the establishment of real distribution network test system, to achieve the rapid access of test objects, flexible reproduction of distribution network single-phase ground fault, put forward a complete set of circuit breaker on the primary and secondary fusion columns single-phase ground fault treatment true test method, effectively verify the primary and secondary fusion column circuit breaker single-phase ground fault disposal function and accuracy rate, found nine bad reasons. Through the establishment of real distribution network test platform, the quality of distribution network equipment access network is improved, and the reliability of distribution network power supply is further improved.