WHAT IS DOL starter?

DOL starters are primarily motors where a high inrush current does not cause an excessive voltage drop in the supply circuit (or where this high voltage drop is acceptable). Direct online starters are commonly used to start small water pumps, conveyor belts, fans, and compressors.

A DOL starter (or Direct On Line starter or across the line starter) is a method of starting a 3 phase induction motor. In DOL Starter an induction motor is connected directly across its 3-phase supply, and the DOL starter applies the full line voltage to the motor terminals.