These Series switch mainly used for AC 50Hz, rated voltage up to 380V and below, DC voltage up to 220V, rated current to 160A electrical circuit for manually  infrequent making or breaking  the circuit  for  the purposes of control and conversion  ,can  also  controlling  three-phase  asynchronous  motors  and  circuit directly  as  the purposes of master  control  and measurement.  The products widely used, instead of the various national switch, can be used as the circuit control switch, measuring  equipment  switches,  motor  control  switches  and  the  master  control switch, and welding machine switch and so on. Compliance with standards: The changeover switch use to the main circuit switching and direct control comply with GB14048.3-2001 The changeover switch use to master control comply with GB14048.5-2001