... 660VAC, and may transfer with load. The ATS rated current series is40A, 63A, 80A,125A, 160A, 250A, 400A, 630A, 800A, ... defined with M.1. Operating principlewhen main power DC-BUS relay testing voltage signal, (such as loss of power or under ... action, at the same time connecting controlled timing relay, after delay,connecting middle relay,supplying power for theRectifier bridge.when driving solenoid ...