... series DC Contactors (It's short for contactor) are mainly used in power system which its rated operation voltage are 440 ... ,750,1000V and rated operation current are 25-4000A,It used for frequent making,breaking electric circuits at long distance and ... in DC motor.Among CCZ38-1250 is used for light load,CCZ38-1000/40 is used for exchanging direction and making-breaking without ...