Electrical · E-BR7GV

Motor Starter Control Wiring Schematic

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A 480-volt, three-phase motor control system is fed through a main circuit protector with lines L1, L2, and L3 connected to a solid-state overload relay and motor. A control power transformer steps down the voltage from 480 to 120 volts alternating current to supply the control circuit through fuses and auxiliary contacts. The control logic incorporates motor contactors, a local control station, a door-mounted display unit, and a control module with digital inputs connected to an ethernet switch in the motor control center. Interlocking contacts and auxiliary relays coordinate the start, stop, fault indication, and operational status of the motor.

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