Star - Delta Starter

What is the name of part number (4) in the circuit shown?

• 2-Main contactor

• Contactor for Star connection

• Contactor for Delta connection

• Overload relay

What is the purpose of using a star-delta starter?

• 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

What is the name of the circuit shown in the figure?

• Control circuit for Reversing the direction.

• Power circuit for Reversing the direction

• Control circuit for Star-Delta Starter

• Power circuit for Star-Delta Starter

How does a star-delta starter help in reducing starting current?

• 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

What are the advantages of using a star-delta starter?

• 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

What are the disadvantages of using a star-delta starter?

• 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

What is the name of part number 2 in the power circuit shown in the figure?

• Overload relay

• Contactor for Delta connection

• Main contactor

• Contactor for Star connection

What is the name of part number 3 in the power circuit in the figure shown ?

• Contactor for Star connection

• Main contactor

• Contactor for Delta connection

• Overload relay

Discuss the applications where a star-delta starter is commonly used.

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

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

What is the name of part number 5 in the power circuit shown in the figure?

• Overload relay

• Contactor for Delta connection

• Three phase induction motor

• Contactor for Star connection