Power circuit diagram and control circuit diagram explanation. 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.
Motor Control Circuits Ladder Logic Electronics Textbook
Dol forward reverse starter. What is dol starter. To run the motor of above 05 hp rating circuit has to made in star delta. Forward reverse direct on line dol starting motor protection with mcb with thermal and magnetic trips operating mode. The figure given below shows the control and power diagram of forward and reverse starter diagram. These forward and reverse starters are dol type and not used above the 05 hp motors. 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 component.
I having 2 hp motorpump by using dol starterin starter again and again relay was damaged the realy setting value is 27 its range is 25 40the motor we are using for chemical water draining. Rdol starter consists of two contactors connecting power supply to the motor. 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. Full description of dol starter for forward and reverse operation. Control circuit of dol starter control circuit of fully automatic starter auto transformer. Rdol reversible dol starters are simply two dol starters in the same box and allow the motor to be started in one direction and then in the other direction.
Concept of reversing the direction of 3 phase induction motor. Reversible dol rdol starter this kind of starter is required when the motor is required to run in both forward as well as reverse directions. How to wire dol stater animation 3 pole 4 pole mccb wiring diagrams and installation digital ammeter wiring with current transformer ct coil message. Working of forward reverse starter control circuit forward direction. Despite this direct connection no harm is done to the motor. The first contactor provides a phase sequence to stator of motor to produce rotation in one direction while other contactor has different phase sequence changing the di.
I hope the above forward reverse motor control diagram 3 phase motor forward reverse starter wiring diagram help you to understand this connection. I checked continuity to l ll body its ok but when i started the motor in fraction of seconds the relay fused out what the reason i cant find it please. These type of starters are used in various applications eg mixing of materials dying. Now if you have any question and have any.
Gallery of Dol Forward Reverse Starter
