Which of the following statement is correct WRT Turbo-alternator overvoltage protection:
- Turbo alternators are provided with the most critical protection
- Control governors are merely sensitive
- Overvoltage protection is usually not provided in turbo alternator
- None of these
Correct answer: 3. Overvoltage protection is usually not provided in turbo alternator
Control governors in turbo-alternators themselves are too sensitive against any speed variations. Due to this reason, the occurrence of Overspeed (Remember: Overspeed change is linked with voltage) is controlled by governors and no extra protection system for overvoltages is required.
More MCQ on power system protection:
- Earth fault current is less or more than short-circuit current
- Alternator Inverted Running occurs due to which fault
- The most dangerous fault in the alternator is