... D frame) and 63 type (C frame)Poles of main circuit: 3 poles, 4polesBasic assembly of CNCPS control and protective ... .2.Auxiliary contact groups include warning contact for short circuit,warning contact for overload, one group of 2NO, 1NC ... digit:number of poles, later digit:protected poles), for example, "33" stand for 3 poles, three protected poles, "30" stand for 3 poles, without protectionControl ...