9A 12A 22A 32A 40A 50A 65A 75A 80A 3P GMC Magnetic AC Contactor

GMC type AC Contactors (Magnetic Contactor) provide remote control of primarily electric motors and compensation & heating systems by cable. They protect the instruments and equipments against overload currents by using thermal relays, for capacitor switching contactor. While switching on a capacitive circuit, a high frequency and large transient current peaks are produced. Switching of capacitor for a single or one of the capacitor banks are different from each other. Step by step "switching on" operation is more difficult for contactor than capacitor bank. Because during this operation for capacitor bank, compensated current occurs. For this reason selecting of suitable contactors the compensating current must be take into consideration for 50kVAR and above, and for less than 50kVAR can be omitted. AC contactor has four main components:  ( 1) the electromagnetic system, including the attraction coil, a movable iron core and the static iron core;  ( 2) the contact system, comprising three main contacts and a two normally open, two auxiliary normally closed contact, it and the movable iron core is connected together are linked with each other;  ( 3) arc extinguishing device of large capacity, general AC contactor with arc extinguishing device, in order to quickly cut off the arc, from burning the main contact; ( 4) insulation housing and accessories, all kinds of spring, a transmission mechanism, a short circuit ring, wiring column whatsapp: +8617096775157 wechat: gmccontactor