DW15 series universal circuit breaker (hereinafter referred to as circuit breaker) is of rated current 100A~ 4000A, (current limiting circuit breaker: 630A), rated voltage AC 50Hz, 440V~1140V. It is mainly used to distribute the energy and protect the circuit and powered device against overload, under voltage, short circuit. DW15-200, 400, 630 circuit breakers can be used for preventing the motor from over load, under voltage and short circuit in the power net of AC 50Hz and 400V. Under normal conditions, the circuit breaker can be applied to infrequently transferring the circuit and infrequently starting the motor infrequently. This product is in conformity with the standards GB14048.2 and IEC60947-2.