Contactors (starters) - designed to control three-phase electric motors. This is a combination of all switching devices required for starting and stopping the engine, with overload protection. Contactors (starters) are mainly designed for remote start-up by direct connection to the network, stopping and reversing three-phase asynchronous motors. In the presence of thermal relays, contactors (starters) protect electric motors from overload of an unacceptable duration.
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