Facilities Maintenance Management Interview Questions and Answers

Star delta starter is a type of motor starter used to reduce the starting current of a motor.

• Consists of three contactors and a timer

• Initially, the motor is connected in star configuration to reduce the starting current

• After a set time, the motor is switched to delta configuration for normal operation

• Used for high power motors

• Reduces voltage drop and prevents damage to the motor

Star delta starter circuit is used to reduce the starting current of induction motors.

• The circuit consists of three contactors, a timer, and an overload relay.

• During starting, the motor is connected in star configuration to reduce the starting current.

• After a set time, the motor is switched to delta configuration for normal operation.

• The overload relay protects the motor from excessive current.

• Example: A 3-phase induct...read more