Maintenancier

15/09/2026

13/09/2026

Self-Locking Motor Control Circuit
A practical 3-phase motor starter circuit using a contactor, MCB, overload relay, and START/STOP push buttons. The contactor’s auxiliary NO contact provides the self-holding function, keeping the motor energized after releasing the START button. The STOP button or overload protection safely interrupts the control circuit when required.

13/09/2026

Delta VFD Wiring Diagram for Induction Motor Control
This schematic details complete wiring for a Delta VFD-EL variable frequency drive powered by a 380V supply. It demonstrates three-wire digital push-button control for forward, reverse, and stop operations, an external potentiometer for analog speed control, a dynamic braking resistor, a warning tower light, and standard three-phase motor connections.

13/09/2026

Star vs Delta 3-Phase Motor Terminal Connections,This visual reference guide compares Star (Wye) and Delta winding configurations in induction motor terminal boxes. It details bridge link placements across terminal lugs (U1-V1-W1 and W2-U2-V2), demonstrating horizontal jumper links for low-current Star starting and vertical parallel links for full-voltage Delta running operation.