Direct Online Starter (DOL Motor Starter) Circuit Diagram and Working

Diagram Components: The DOL starter wiring diagram includes a circuit breaker, contactor, and overload relay, essential for motor protection and operation. Working Principle: The starter directly connects the motor to a three-phase supply, utilizing a control circuit energized from two phases to manage start and stop functions.. A complete direct online starter - DOL starter diagram with motor and control wiring, In the diagram magnetic contactor, overload relay and switches.

The wiring diagram of the Direct online motor starter is given below. The motor draws a large current, and it starts reducing when the motor attains its base speed.. In this article, we will discuss the DOL starter Working Principle and Construction, as well as the control circuit diagram and power circuit wiring for Single and three-phase motor starters. DOL starter connects the motor directly to the supply without a reduction in supply voltage and applies full line voltage to the 3-phase motor. this is the main disadvantage of this starter.