A Star-Delta starter is used with suitable three-phase induction motors to reduce the starting current by initially connecting the motor windings in Star and then changing to Delta (A) for normal operation.
The basic sequence is:
Start
Star connection
Transition Delta
connection
Normal running
A typical Star-Delta control system involves components such as:
Contactors
Timer
Overload relay
Start/Stop push buttons
Motor
Control and power circuits.
