DNGL Switch-Disconnecter DNGL series Switch-disconnecter is applicable for AC 50Hz, rated voltage AC 660V and below, DC440v and below, and rated current 3150A. It can be applied for manually infrequent making & breaking and disconnecting of the circuit. It only can be used for disconnecting power supply, and can't break the circuit on load if exceeds 1000A Switch-Disconnecter