A dol starter is a direct on line motor starter. Wiring of the direct on line dol motor starter 1 three phase supply 230volt coil see wiring diagram.
What Is Direct Online Starter Working Principle And Wiring
Three phase dol starter wiring diagram. The r y and b phase are connected through mccb to the contactors. Please see the attached diagram for guidance. This is the wiring diagram of a dol starter. In the below diagram the mccb is not shown the three phase supply comes from mccb circuit breaker. And the normally open and normally close push button shown. The contactor has 3 main no contacts known as l1 l2 and l3.
And one wiring is called controlling wiring. 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 l1 contactor is connected from normally open no to r phase using mccb. 13 17 with a flying lead to be connected to overload terminal 95. In the above three phase dol starter wiring diagram. This diagram illustrates possible wiring using a tesys d lc1d contactor and tesys lrd overload lrd and stop control is assumed to be by operation of the stop button on the overload.
The coil of the contactor is 380 vac. Mccb or circuit breaker. Three phase dol starter control and power wiring diagram reverse forward with limit switch reverse forward dol starter power and control wiring wiring of rev. In the above dol starter diagram. 1 the following links are pre fitted to the starter. The contactor has 3 types of contacts.
Despite this direct connection no harm is done to the motor. And if you want to learn it in image type diagram. In the above 3 phase dol starter wiring diagram all connection shown. Three phase dol starter wiring diagram. The diagram below shows the wiring for a single phase motor and the path through the contactor and overload. The contactor connection with thermal overload relay and the motor connection with overload relay is shown.
All other control and power connections have to be made by the installer. Dol starter control diagram three phase. 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. In which the three phase induction motor connection shown and all the direct online starter wiring shown with simple steps. The wiring of direct on line control circuit starter is following. 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 connection of contactor can be done among relay coil supply voltage as well as thermal overload. A2 14 18. What is dol starter. The ryb is the three phase 380 volts supply.
Gallery of Three Phase Dol Starter Wiring Diagram
