... molded case circuit breaker (short for circuit breaker),AC50/60HZ,Current :63-800A,Voltage:400V,500V,690V,800V.. YKM1 series of molded case circuit breaker (short for circuit ... breaker), is the latest circuit breaker of ... )Rated limit short circuit breaking capabilityRated operation short circuit breaking capabilityExternal dimensionInstallation ...