FIELD: electrical engineering.
SUBSTANCE: reverse control circuit of a self-braking asynchronous electric motor with a shifting squirrel-cage rotor contains a reversible magnetic starter, which includes two linear contactors, two thermal protection relays, an automatic switch, fuses, buttons in the control circuit. In series with the fuses, there is a time relay with a delay in the operation time of a single-pole contactor connected to the line wire of the electric motor.
EFFECT: improving the operational characteristics, namely, reducing the starting currents of the stator winding, increasing the intensity of starts, operational reliability and durability of the electric motors.
1 cl, 1 dwg
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