The WCT Din Rail Mounted Contactor uses the main contact to open and close the circuit, and the auxiliary contact to conduct the control loop. The main contact generally only has a normally open contact, while the auxiliary contact often has two pairs of contacts with normally open and normally closed functions. Small contactors are often used as intermediate relays in conjunction with the main circuit. The contacts of the AC contactor are made of silver-tungsten alloy, which has good electrical conductivity and high temperature ablation resistance.
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