In this article we are going to learn about the forward reverse starter. Working of forward reverse starter control circuit forward direction.
Large Induction Motor Starters Provide A Range Of Features
Direct online starter forward reverse. Usually the controlling of contactor can be done by using separate buttons like start and stop. The motor is connected through a starter across the full supply voltage. It consists a coil operated contactor c controlled by start and stop push button as shown in the connection diagram below. Forward reverse starter diagram. The direct online starter includes a circuit breaker or mccb overload relay and contactor for the protection of 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.
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. In this post you will complete learn about the forward reverse three phase motor controlling starter diagram. Different starting methods are employed for starting induction motors because induction motor draws more starting current during starting. Direct on line starter direct on line starter method is a common method of starting of cage induction motor. Bala at 408 pm. Direct online motor starter square d.
The unlocking of an electromagnetic contactor can be done through the thermal overload relay beneath fault conditions. 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. 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. As the name defines forward reverse starter is used to run the motor in both sides forward and reverse. The direct on line starter method figure is shown below. In the 3 phase motor forward reverse starter wiring diagram.
The figure given below shows the control and power diagram of forward and reverse starter diagram. Forward reverse direct on line starter penghidup talian terus forward reverse litar utama main circuit litar kawalancontrol circuit. Newer post older post home. What is dol starter. Despite this direct connection no harm is done to the motor. 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.
To prevent damage to the windings due to the high starting current flow we employ different types of starters.
Gallery of Direct Online Starter Forward Reverse
