Some motor starter diagram

A  starter (or Direct On Line starter or across the line starter) is a method of starting of a 3 phase induction motor. In  Starter an induction motor is connected directly across its 3-phase supply, and the  starter applies the full line voltage to the motor terminals. Despite this direct connection, no harm is done to the motor. A  motor starter contains protection devices, and in some cases, condition monitoring. A wiring diagram of a  starter is shown below:

Start 1 direction of rotation

Start 2 direction of rotation

Start Star-Triangle 1 direction of rotation

Start Star-Triangle 2 direction of rotation