It consists a coil operated contactor c controlled by start and stop push button as shown in the connection diagram below. What is dol starter.
Electrical Wiring Diagram Forward Reverse Motor Control And
Direct online starter forward reverse. Press on push button f on the forward contactor coil gets supply through phase r off push button r2 forward contactor coil on push button f phase y. Design and construction of forward and reverse direct online motor starter abstract a direct on line starter often abbreviated dol starter is an electricalelectronic circuit composed of electro mechanical and electronic devices which are employed to start and stop an electric motor. As the name defines forward reverse starter is used to run the motor in both sides forward and reverse. Direct online motor starter square d. To prevent damage to the windings due to the high starting current flow we employ different types of starters. The motor is connected through a starter across the full supply voltage.
The direct online starter includes a circuit breaker or mccb overload relay and contactor for the protection of motor. In this article we are going to learn about the forward reverse starter. Different starting methods are employed for starting induction motors because induction motor draws more starting current during starting. The direct on line starter method figure is shown below. The unlocking of an electromagnetic contactor can be done through the thermal overload relay beneath fault conditions. Direct on line starter direct on line starter method is a common method of starting of cage induction motor.
Usually the controlling of contactor can be done by using separate buttons like start and stop. Forward reverse direct on line starter penghidup talian terus forward reverse litar utama main circuit litar kawalancontrol circuit. In the 3 phase motor forward reverse starter wiring diagram. Forward reverse starter diagram. Same as for direct on line starting instead of fuses and thermal relay you can use a motor circuit breaker with thermal and magnetic trips a simple but at least as effective componentby pressing forward push button the q2 coil contactor is energized the motor will be connected for clockwise run and maintains itself after the button reverse by means of auxiliary switch q2 the. In this post you will complete learn about the forward reverse three phase motor controlling starter diagram.
Working of forward reverse starter control circuit forward direction. 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. Bala at 408 pm. Newer post older post home. Despite this direct connection no harm is done to the motor. I shown the 3 pole mccb circuit breaker 2 magnetic contactor normally open normally close push button switch thermal overload relay 3 phase 4 wire system supply 3 phase.
The figure given below shows the control and power diagram of forward and reverse starter diagram.
Gallery of Direct Online Starter Forward Reverse
