Which of the following statement is correct WRT Turbo alternator overvoltage protection | Power System Protection MCQ

Which of the following statement is correct WRT Turbo-alternator overvoltage protection:

  1. Turbo alternators are provided with the most critical protection
  2. Control governors are merely sensitive
  3. Overvoltage protection is usually not provided in turbo alternator
  4. 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:

  1. Earth fault current is less or more than short-circuit current
  2. Alternator Inverted Running occurs due to which fault
  3. The most dangerous fault in the alternator is

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