... transfer switch 2.Rate Current: 63A--3200A 3.Option: 3P or 4P ,Motor control switch 4.Genset ATS MCSC series dual power auto transfer ... inter-lock designation.It provides reliability,easy operation,fast switch features.And it can be utilized in double power ... ,VE or VSOption: 3P or 4P Motor control switch,similar with SOCOMEChttp://www.aliexpress.com/store/706033 Genset Automatic transfer switch ATS