Wiring Dol Starter Single Phase - 21 Images

When the motor hits a certain speed a switch inside the motor disconnects the start winding.

Wiring dol starter single phase. The direct on line motor starter dol consist a mccb or circuit breaker contactor and an overload relay for protection. The connection of the supply to the motor is normally on the underside of the motor terminal lid lol doesnt matter which way round you connect it it will only rotate in one direction if the capcitor isnt connected the motor will. In the above one phase motor wiring i first connect a 2 pole circuit breaker and after that i connect the supply to motor starter and then i do cont actor coil wiring with normally close push button switch and normally open push button switch and in last i do connection between capacitor start motor and contactor. Direct on line dol motor starter.

The l1 contactor is connected from normally open no to r phase using mccb. The wiring of direct on line control circuit starter is following. 3 wiring of dol devices for 230v single phase with 230v coil wiring of additional start stop devices on dol devices for 400v 3 phase with 230v coil. Additional start and stop stations can be wired to the dol control circuit.

The above diagram is a complete method of single phase motor wiring with circuit breaker and contactor. You can also connect timer limit switches float switch reverse forward remote switches and other controlling device. Single phase motor dol starter connection diagram. The connection of contactor can be done among relay coil supply voltage as well as thermal overload.

Dont forget that there are two windings in a single phase motor. Electromagnetic contactor which can be opened by the thermal overload relay under fault conditions. As the power ratings of our starters are based on 415vac 3 phase it becomes necessary to base starter selection on the full load current of the motor and not the power rating. This means that typically single phase motor current will be at least double that of 3 phase motors of similar power output.

Note that the single phase dol starter wiring diagram is also like this. 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 control diagram three 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.