HKKM2L Series of moulded case circuit breakers HKKM2L Series of Elec. leakage protective breakers is a new model Elec. leakage protective breaker of rated voltage up to 800V, designed and manufactured by the company with advanced international technology and with the aim of satisfying the most advanced market requirements for AC. 50Hz, rated working voltage of 400V and rated working current up to 800A circuit to non-frequently start motor or changeover circuits