To start a three-phase induction motor or a phase pump traditionally, a Dol panel (Direct online) is used. A full line voltage is applied to the motor terminals by that DOL panel starter. Simple, classic, and cost-effective: the DOL panel. As a result, it’s easier to use and control Because DOL starters are classics, troubleshooting them is a cinch. The is the most basic kind of induction motor starter. A circuit breaker, contactor, and an overload relay are all included in the Direct on-Line Motor Starter (DOL). Under fault circumstances, the thermal overload relay might open the electromagnetic contactor.
In most cases, the contractor is operated by two buttons: a start button and a stop button, and hold in contact is connected to an auxiliary contact on the contactor. In other words, when the motor is running, the contactor is electrically locked shut.