| Type | Gmc magnetic ac contactor |
GMC type AC rs (Magnetic r) 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 r. 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 r than capacitor bank. Because during this operation for capacitor bank, compensated current occurs. For this reason selecting of suitable rs the compensating current must be take into consideration for 50kVAR and above, and for less than 50kVAR can be omitted.
AC r has four main components:
( 1) the electromagnetic system, including the attraction coil, a movable iron core and the static iron core;
( 2) the system, comprising three main and a two normally open, two auxiliary normally closed it and the movable iron core is connected together are linked with each other;
( 3) arc extinguishing device of large capacity, general AC r with arc extinguishing device, in order to quickly cut off the arc, from burning the main
( 4) insulation housing and accessories, all kinds of spring, a transmission mechanism, a short circuit ring, wiring column
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