Discussion on Testing Method of Electrical Endurance for High Voltage Alternating-current Circuit Breakers

The definition of electrical endurance of HV alternating-current circuit breakers is explained, and the testing methods specified in IEC62271-100, GB1984-2003 and DL402-1999 are introduced in this paper. By comparing the testing methods of some countries and analyzing the influences of electrical endurance tests on circuit breaker manufacturing and utilization, the revision of testing methods for Class E2 circuit breakers is suggested for national standard and electric power industry standard of China.