Genarator Faults

Which of the following faults is most commonly observed in generators?

• Phase-to-phase short-circuit fault
• Single-phase to ground fault
• Ground fault
• Overvoltage fault

Which of the following is not a typical cause of stator winding faults in a generator?

• Aging of insulation
• Overvoltage due to lightning stroke
• Overheating due to overloading
• Abrasion due to dust accumulation or debris

Which of the following relay is used to protect generators from stator faults due to rotor failure?

• Negative sequence relay
• Differential relay
• Overcurrent relay
• Overvoltage relay

What is the purpose of a synchronizing relay used in a generator?

• To synchronize the generator with the grid
• To control the frequency of the generator
• To protect the generator from stator winding faults
• To prevent reverse power flow

Which of the following is the most reliable method for detecting inter-turn faults in a generator's stator winding?

• Open-circuit voltage test
• Short-circuit current test
• DC resistance measurement
• All of the above

What is the purpose of a ground fault relay in a generator's protection system?

• To protect the generator from ground faults
• To prevent reverse power flow
• To protect the generator from overvoltage faults
• To control the frequency of the generator

Which of the following is not a typical cause of rotor winding faults in a generator?

• Rotor insulation degradation due to aging
• Overheating due to overloading
• Mechanical vibration and excessive mechanical stress
• Abrasion due to dust accumulation or debris

Which of the following relays is used for detecting rotor winding faults in a generator?

• Negative sequence relay
• Differential relay
• Overcurrent relay
• Rotor earth fault relay

Which of the following faults in a generator's stator winding can cause overheating and mechanical stress?

• Inter-turn fault
• Ground fault
• Overvoltage fault
• All of the above

Which of the following is a typical cause of overvoltage faults in a generator's stator winding?

• Lightning strikes
• Overheating due to overloading
• Mechanical vibration and excessive mechanical stress
• Abrasion due to dust accumulation or debris