Dol Starter. Dol starter consists of mccb contactor and overload relay. Calculate size of each part of dol motor starter for the system voltage 415v 5hp three phase house hold application induction motor code a motor efficiency 80 motor rpm 750 power factor 0 8 and overload relay of starter is put before motor.
It is used for low rating usually below 5hp motors. Direct on line starter is the simplest kind of starter that connects the motor directly to the power supply through a three phase contactor. Dol starter is a device consist of main contactor protective devices and overload relay which is used for motor starting operations.
It holds the switch on condition when motor is running by the use of latch mechanism and interrupts the flow of current to the motor once the stop button is pressed.
It acts as a switch under normal working condition by providing the means to switch on and switch off the motor. The dol starter consists of two switches namely green and red where the green switch is used to start and red switch is used to stop the motor. Hence such a starter cannot reduce the starting inrush current. Dol direct online starter.
