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Electrical Engineering QUESTION #2144
Question 1
What is the primary function of a Buchholz Relay in a transformer?
  • Protection against external short circuits
  • Protection against internal gas-producing faults✔️
  • Regulation of secondary voltage
  • Measurement of core temperature
Correct Answer Explanation
A Buchholz relay is a gas-actuated safety device installed to detect internal faults like insulation breakdown or overheating that produce gas within the oil.