... distance and for frequent starting stopping and reversing control of AC motors ,They comply with IEC947,VDE0660MGB14048.OPERATING CONDITIONS1.The altitude ... snow.FEATURES1.For better safety,conductive part are enclosed.2.Small sizes,light weight,material of arc chute adopts unsaturated ... main contacts system is unique,abrasion of the contacts is small,with a long electric endurance.5.The operation of ...