... .It provides reliability,easy operation,fast switch features.And it can be utilized in double power supply infrequence switching -- ... 5000A,rating frequency 50/60Hz.It can be widly used in the places, needed double power continuedly, such as emporium ... 3200A ,VE or VSOption: 3P or 4P Motor control switch,similar with SOCOMEChttp://www.aliexpress.com/store/706033 Genset Automatic transfer switch ATS