Automatic Transfer Switches Model:YES1-N/YES1-C Current:16A~32A Pole:2P,3P,4P YES1 is suitable for transferring between two circuits of power supply(MAIN power supply, EMERGENCY power supply) in AC 50Hz,rated working voltage to 220V and rating current up to 16A~32 A, Function:over voltage,under voltage,lost phase,Utility to Utility Utility to generator(With a passive contact sent a signal to start or shut off the generator)

Attention: It must not do the test of insulating stand voltage for the quality guarantee.