Perfect Motor Starter Wiring

The direct on line motor starter dol is designed to switch a single or three phase induction motor at rated voltage.

Motor starter wiring. Motor starters have a set of contactors. The relay contacts are heavy duty and are rated for the motor starting current. The motor s starter wires directly to the motor s wire terminals.

However motor starters are designed to trip on heater overload. Figure 1 is a typical wiring diagram for a three phase magnetic motor starter. Motor starters serve two main purposes.

When the motor s switch is turned on voltage flows through the contactor s coil creating a magnetic field. 1 2 2kw motor with a flc of 5 amps 415volts. In north america an induction motor will typically operate at 230v or 460v 3 phase 60 hz and has a control voltage of 115 vac or 24 vdc.

There are basically two types of motor starters manual starters and magnetic starters. Figure 1 typical wiring diagram line diagrams show circuits of the operation of the controller line diagrams also called schematic or elementary diagrams show the circuits which form the basic operation of the controller. If your electrical box circuit breaker trips before your motor burns up it is incidental not on purpose.

Several other combinations are possible in north america and other countries and are easily derived from the methods shown in this document. It comprises an enclosure in steel or plastic a contactor start contact link wires and stop start buttons. A motor starter is a combination of devices used to start run and stop an ac induction motor based on commands from an operator or a controller.