YFM1 series plastic shell type circuit breaker (hereinafter referred to as circuit breaker) is oneof the new circuit breakers desianed and developed by the company comprehensively usinginternational advanced technology. lts rated insulation voltage is 800V, suitable for AC 50Hzor 60Hz, rated working voltage to 690V, rated current to 800A distribution network circuit.used to distribute power and protect lines and power equipment from overload, short circuitundervoltage and other faults damage. At the same time, it can also be used as the motor'sinfrequent starting and overload, short circuit, undervoltage protection.According to its rated limit short-circuit breaking capacity, the circuit breaker is divided into ltype (standard type), M type (higher score type), H type (high score type) three categories.The circuit breaker has the characteristics of small volume, high breaking and short flying arc.Circuit breaker product standard: in line with lEC60947-2,GB14048.2-2008.