In motor control circuits, what is the function of the M1 auxiliary contact in relation to the START switch?

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Multiple Choice

In motor control circuits, what is the function of the M1 auxiliary contact in relation to the START switch?

The M1 auxiliary contact acts as a holding contact that keeps the circuit closed after the START switch is released. When you press START, the contactor coil is energized to start the motor. The M1 auxiliary contact, which is part of the same contactor, closes and provides a path that bypasses the momentary START button, so the coil stays energized even after you let go of START. The motor keeps running until STOP is pressed or power is removed. This function isn’t about tripping on overload, regulating voltage, or reversing direction—those tasks are handled by separate components.

The M1 auxiliary contact acts as a holding contact that keeps the circuit closed after the START switch is released. When you press START, the contactor coil is energized to start the motor. The M1 auxiliary contact, which is part of the same contactor, closes and provides a path that bypasses the momentary START button, so the coil stays energized even after you let go of START. The motor keeps running until STOP is pressed or power is removed. This function isn’t about tripping on overload, regulating voltage, or reversing direction—those tasks are handled by separate components.

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