The simplest form of motor starter for the induction motor is the direct on line starter. In this post we are going to know the details of each part of dol starter diagramall parts of the dol starter power circuit diagram and control circuit diagram are explaineddirect online starter or dol starter is very useful and commonly used ac starterdol starters are mainly used with up to 5 hp motors.
Dol Starter Direct Online Starter Diagram Amp Working
Dol motor starter circuit diagram. The circuit breaker is used for protection against short circuits while the overload relay protects the motor from overloading. Between the mains supply terminals and motor terminals the dol starter main terminals are connected and with the two terminals of the three phase power supply as described in figure 1 the control circuit is energized. A dol starter or direct on line starter or across the line starter is a method of starting of a 3 phase induction motorin 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. The direct on line motor starter dol consist a mccb or circuit breaker contactor and an overload relay for protection. The contactor is used for starting and stopping the motor where the green and red buttons are connected. All connection i shown with complete guide.
Despite this direct connection no harm is done to the motor. Electromagnetic contactor which can be opened by the thermal overload relay under fault conditions. The dol starter is made of a circuit breaker or mccb or fuse an overload relay and contactor or coil. What is dol starter. I dol starter wiring connection with start and stop buttons are shown in the above figure 1. In the above three phase dol starter wiring diagram.
In the below dol starter wiring diagram i shown a molded case circuit breaker a magnetic contactor normally open push button normally close push button switch thermal overload relay motor trip indicator and 3 phase motor.
Gallery of Dol Motor Starter Circuit Diagram
