A contactor is an electrical appliance used to frequently connect and disconnect AC and DC main circuits and large-capacity control circuits over long distances. The main control objects are motors, lighting, capacitor banks, etc., which are divided into AC contactors and DC contactors. Compared with circuit breakers, the difference is that: the operating frequency is very high (so its electrical life and mechanical life are required to be long enough); it has higher breaking and making capacity, but it is generally used in voltage levels of 1KV and below It cannot be compared with the tens of kilovolts and hundreds of kilovolts of circuit breakers.
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