Understanding Motor Starters

What type of motor starter is suitable for small, low-powered motors?

• Star-Delta Starter

• Direct Online Starter (DOL)

• Rotor Resistance Starter

• Variable Frequency Drive

Which motor starter incorporates overload contacts to trip the device in case of overcurrent?

• Star-Delta Starter

• Direct Online Starter (DOL)

• Rotor Resistance Starter

• Soft Starter

In a Star-Delta Starter, how is the motor initially connected to reduce starting current?

• Delta connection

• Star connection

• Series connection

• Parallel connection

What is the purpose of the electromagnetic coil in a Direct Online Starter (DOL)?

• To reduce starting current

• To operate a contactor

• To provide undervoltage protection

• To introduce variable resistance

Which type of motor is required for a Rotor Resistance Starter?

• Squirrel cage induction motor

• Wound rotor induction motor

• Permanent magnet motor

• Synchronous motor

What protection does a Direct Online Starter (DOL) provide to prevent automatic restart during a loss of supply?

• Overcurrent protection

• Undervoltage protection

• Short circuit protection

• Thermal protection

In a Star-Delta Starter, what happens after a user-set time?

• The motor stops

• The motor switches to star connection

• The motor switches to delta connection

• The motor speed varies

What is the function of the external variable resistance unit in a Rotor Resistance Starter?

• To increase the motor speed

• To reduce start-up current

• To provide undervoltage protection

• To switch between star and delta connections

How many connection points are there in a Star-Delta Starter for a three-phase motor?

• Four

• Five

• Six

• Eight

What is the main advantage of using a Star-Delta Starter over a Direct Online Starter (DOL)?

• It is cheaper

• It reduces starting current

• It provides better speed control

• It is suitable for single-phase applications