A New Method of Rising the Intensity of Self Restoring Insulation in Circuit Breaker

The physical process when a circuit breaker cuts out the arc of short circuit current in a power system is analysed,and that the neutral point in a system grounds through a special non linear grounding resistor is presented in this papepr.The method can restrict the speed of short circuit current which flows through zero value.Therefore it raises the intensity of self restoring insulation and enhances the ability of cutting out short circuit current in circuit breaker.The calculating result is found to be close to the test one