DW15 series all-purpose type breaker (hereinafter referred to as breaker) is suitable for use in AC 50Hz, rated current to 6300A, rated voltage to 1140V (shell frame level rated current 630A) or 380V (shell frame level and above) 1600A rated current of distribution network, distributed power and power lines and power equipment overload, owe voltage, short circuit protection purposes. Shell frame level 630A rated current of the breaker can also in AC 50Hz, 380V network for motor overload, owe voltage and short circuit protection.