... ) Rated current of over current release: 40, 63, 80, 1252) Pole number: 2p, 3p, 4p3) Rated ... protective function of reopeningand closing3) Four working modes: automatic control, common source (power supply I), standbypower ... , the controller will emit an alarm sound Automatic switch and its corresponding intellectual displayer ,which ... is the instant exciting mode. NA Series Automatic Transfer Switches