WlT65-63 series dc circuit breaker for dc rated voltage up to and DC1000v,rated insulation voltage is 1000v,rated current 63A circuit,suitable for non-specialists and maintenance is not required. Such circuit breaker is mainly used in the dc power supply systems of power plants, substations, and communications, transportation, industrial and mining enterprises, while household is also very appropriate. It is used in circuit and electricity equipments for over current and short circuit protection,and can be used in infrequent on-off operation too.