... backup power auto switchIP20IntelSpecifications1. Under voltage,over voltage,loss phase protection 2.Rated voltage of 400V, rated current 80A~3200AAutomatic ... transfer switch suitable for AC50HZ ,rated voltage 380V, DC rated voltage up 220V,rated electric current to 3200A.The ... supply, automatic change and automatic recovery, over voltage or lower-voltage function. 9. C. Municipal power supply-oil ...