To increase the motor's efficiency

To improve the motor's torque

To decrease the motor's speed

To reduce the starting current drawn by the motor

Control circuit for Reversing the direction.

Power circuit for Reversing the direction

Control circuit for Star-Delta Starter

Power circuit for Star-Delta Starter

By initially connecting the motor windings in a star configuration to reduce voltage and starting current.

By using a direct-on-line starter instead

By increasing the voltage supplied to the motor windings

By reducing the number of motor windings

Reduced starting current, minimized voltage drop during starting, improved efficiency

No impact on starting current, increased voltage drop during starting, decreased efficiency

Reduced starting current, increased voltage drop during starting, improved efficiency

Increased starting current, maximized voltage drop during starting, reduced efficiency

No disadvantages at all

Higher cost, more maintenance, higher starting current

Shorter lifespan, less efficiency, lower power output

Lower cost, less maintenance, lower starting current

Overload relay

Contactor for Delta connection

Main contactor

Contactor for Star connection

Contactor for Star connection

Main contactor

Contactor for Delta connection

Overload relay

high rating motors, typically above 5 HP or 3.73 KW.

low rating motors, typically under 5 HP or 3.73 KW.

Overload relay

Contactor for Delta connection

Three phase induction motor

Contactor for Star connection