QCC Series of Magnetic Blow DC Contactors may be used to start,stop,adjust and steer the accumulator-driven vehicles,also may be widely applied as power switching and on UPS in fields of traction,mineral machinery,petrochemical,metallurgy & marine,telecommunication and computer.The contactors are in conformity with JB3974-85* Basic Technical Requirements on DC Appliance Used on Accumulator-Driven Vehicles*,and in conformity with standards of YD/T585-92*Commum ication Power Apparatus & Appliance*and YD/T512-92*Techincal Requirements for Power Equipment on Telegraply*