In electrical engineering, it is often used for electric motors as a control object because it can quickly cut off the AC and DC main circuits and devices that can be frequently switched on with high current control (some types up to 800 amps). Used to control electrical loads such as plant equipment, electric heaters, working machines, and various power units. The contactor not only turns the circuit on and off, but also has a low voltage release protection. The contactor has a large control capacity and is suitable for frequent operation and remote control. It is one of the important components in the automatic control system.
In industrial electrical, there are many types of contactors, and the current varies from 5A to 1000A, and its use is quite extensive.
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