Motor Starting Methods

Across-the-Line Starting

Motor Starting Methods

Reduced-Voltage-Starting.

Used when starting current is too high for the system to tolerate.

Need special method such as timers or speed switches to make the transition from reduced voltage to full voltage.

Transition usually timed so that it occurs when rotor is at 90% of rated speed.

Motor Starting Methods

Resistor Starting.

Motor Starting Methods

Reactor Starting.

Motor Starting Methods

Autotransformer Starting

Motor Starting Methods

Wye-Delta Starting