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Automatically series resistor start three-phase motor circui

2016-09-02 05:48  
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Automatically series resistor start three-phase motor circuit
Pressing start button ST, the AC contactor 1KM and time relay KT get electric and action, normally open contact 1KM is closed and self-locked, the main contact 1KM action makes motor stator winding connect to resistor group R in series, motor M buck starts. At the same time, KT starts timing. When KT delay reaches the setting time, KT normally open contact close with a delay time, and 2KM coil gets electric, its main contacts 2KM action, then resistor R is shorted connected, the stator windings of the motor will be put into the rated voltage operation.