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. All controlling of starter are controlled by this circuit.
Forward Re Verse Control Developing A Wiring Diagram And
Dol motor starter diagram. A dol starter is a direct on line motor starter. Electromagnetic contactor which can be opened by the thermal overload relay under fault conditions. Despite this direct connection no harm is done to the motor. The simplest form of motor starter for the induction motor is the direct on line starter. The dol starter is made of a circuit breaker or mccb or fuse an overload relay and contactor or coil. The direct on line motor starter dol consist a mccb or circuit breaker contactor and an overload relay for protection.
Dol starter control circuit diagram consist components like main power contactor start button stop push button and overload relay is connected in series this circuit is called control circuit of dol motor starter. A wiring diagram of a dol starter is. All connection i shown with complete guide. It comprises an enclosure in steel or plastic a contactor start contact link wires and stop start buttons. A dol motor starter contains protection devices and in some cases condition monitoring. 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.
The thermal overload is supplied as a separate item. I dol starter wiring connection with start and stop buttons are shown in the above figure 1. The circuit breaker is used for protection against short circuits while the overload relay protects the motor from overloading. Direct on line dol motor starter description the direct on line motor starter dol is designed to switch a single or three phase induction motor at rated voltage. 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. How dol starter control diagram works when we press the start button to start the motor the relay gets the phase and circuit completed thus coil energizes and contactors produce magnetic field the main contactor closes and motor gets the supply and the motor startswhen we press the stop button the circuit will interrupt and the motor stop.
Sometimes known as an across the line starter this type of motor controller is used as a simple starter for larger electric motors providing. The contactor is used for starting and stopping the motor where the green and red buttons are connected. In the above three phase dol starter wiring diagram. 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.
Gallery of Dol Motor Starter Diagram
