07/19/2025
This is a self-locking motor control circuit with indicator lights, often used for 3-phase induction motors. It features start (ON), stop (OFF), and fault indication using push buttons and pilot lamps. The circuit includes a contactor with an auxiliary contact (NO - Normally Open, NC - Normally Closed) for self-holding operation, which keeps the motor running after the ON button is released. The OFF button breaks the circuit, stopping the motor. The FAULT indicator lights up if there's an issue, helping in quick diagnosis. The circuit is powered by a 3-phase supply (A, B, C) with neutral 👎 and is protected by MCB and overload relays.