A concise guide about direct on-line motor starters
A direct on-line motor starter is the simplest form of motor starter. At Total Control and Distribution, we stock a wide range of DOL motor starters that are manufactured by ABB.
As seen in the image above, they have a separate on and off button. A DOL starter consists of a circuit breaker or MCCB, a contactor, and an overload relay for its protector. The contactor starts off in a closed position with full voltage added to its motor windings.
This YouTube clip shows demonstrates how a DOL starter works.
In Greater Detail
View a more detailed article by Jignesh Parmar. This is worth a read.
Total Control and Distribution, 23 January 2017.