Dol Starter Wiring Diagram 3 Phase

A dol starter or direct on line starter or across the line starter is a method of starting of 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.

Dol starter wiring diagram 3 phase. 13 17 with a flying lead to be connected to overload terminal 95. In this article we will discuss dol starter direct online starter working principle and construction dol starter diagram control diagram power circuit and wiring single 3 phase starter direct on line is the simplest and cheapest method used for starting three phase motor. Wiring of the direct on line dol motor starter 1 three phase supply 230volt coil see wiring diagram. A2 14 18.

To use three phase electricity a motor needs windings spaced 120 degrees apart. The coil of the contactor is 380 vac. The main heart of dol starter is relay coil. Then read the below article and learn from simple dol starter wiring diagram.

In the above dol starter diagram. Dol starter wiring diagram for three phase motor to wire a 3 phase motor the first thing to wire is a circuit breaker which is disconnect and connecting point then we will get the supply from circuit breaker and connect supply to contactor or starter and then to overload relay. 1 the following links are pre fitted to the starter. As you can see in the above picture the 3phase voltage is apply to mccb q1 it is a short circuit protection device.

Direct on line starter wiring diagram. All other control and power connections have to be made by the installer. Working principle of dol starter. The contactor connection with thermal overload relay and the motor connection with overload relay is shown.

In the above three phase dol starter wiring diagram. What is dol starter. Single phase dol starter wiring diagram. We have to use all 3 poles of the overload relay otherwise the imbalance due to the current flow in only 2 of them will cause unnecessary tripping.

Normally it gets one phase constant from incoming supply voltage a1 when coil gets second phase relay coil energizes and magnet of contactor produce electromagnetic field and due to this plunger of contactor will move and. And the normally open and normally close push button shown. The r y b is the three phase 380 volts supply. A single phase dol motor starter can be designed using the same components as shown in following diagram.