Application
The series phase-change switch is used in electric power system with AC 50Hz, voltage up to 1140V, current 200A and 400A. Its as usage of change power phase gradation when main circuit was isolated and non load, it can dispart brake with charge when its fault, it has higher disjunction ability and special for make up kv grade mining used flame-proof electromagnetic starter.
Product features
1. Extinguish arc cover was die-casted by DMC extinguish arc insulated material, with high insulation extinguish arc.
2. With reliable and steady break phase-change ability.

 to electricity meshwork made by start current, protect reliable starting of motor.  It can be directly or remotely controlled, and make reversing when controlled motor stops.