DOL Starter Wiring Steps
Step-1: DOL (Direct-On-Line) starter is used to start three-phase induction motors.
Step-2: It applies full line voltage directly to the motor.
Step-3: It consists of MCB, Contactor, Overload Relay (OLR), Start Push Button (NO), Stop Push Button (NC), and Motor.
Step-4: Pressing the START button energizes the contactor coil and seals through the auxiliary contact.
Step-5: Pressing the STOP button or overload trip disconnects the motor.
Step-6: Suitable for small motors up to about 5 HP.
Abbreviations
- MCB - Miniature Circuit Breaker
- OLR - Overload Relay
- NO - Normally Open
- NC - Normally Closed
Applications
- Water Pumps
- Air Compressors
- Fans
- Small Industrial Machines