Recently, high reliability of electrical power system is required. Accordingly, for the protection of the power systems used circuit breakers are required high reliability. Nowadays general interruption time of circuit breaker is 3~5 cycle, but recent...
Recently, high reliability of electrical power system is required. Accordingly, for the protection of the power systems used circuit breakers are required high reliability. Nowadays general interruption time of circuit breaker is 3~5 cycle, but recently, to meet the needs of the high reliability, research on high speed circuit breaker has been made. The studies of high speed circuit breaker consist of research of high speed protection relay and high speed circuit mechanism. In this study, we proposed high speed mechanism with hybrid type mechanism, which consists of conventional spring mechanism and Thomson coil actuator.