automatic transfer switch suitable for AC50HZ,rated voltage 380,DC rated voltage up 220V,rated electric current to 3200A Automatic transfer switch SGLD (general type):General:SGLD series automatic transfer switch suitable for AC50HZ ,rated voltage 380V, DC rated voltage up 220V,rated electric current to 3200A.The switch is used in the infrequent on and off circuit.Performance characteristics:1. ...