Auto Transfer Switch (ATS)

ATS is two big relays that use to connect main power supply or generator power to the load. To prevent two relays operate at a same time there is a mechanical lock between two relays also it prevent closing one relay while operating another relay. Although there is mechanical lock between two relays they will not energize at a same time by the Auto Mains Failure (AMF) board, lock will be useful it same malfunction will occur.