GTQ2Z series automatic transfer switch (ATS) is suitable for the transfer between two power sources , common source (power supply Ⅰ)and standby power supply (power supply Ⅱ). Whose rated voltage is below 50Hz , 400V (AC) when one power supply malfunctions to assure the safe , and stable power supply . The setting mainly used for hospital . shopping center , bank , and chemical industry , metallurgy , high building , military facilities etc important situation where power breaking can't be allowed . This product complies with standards of IEC60947-6-1, GB14048 , 11-2002 , etc .