Buchholz relay is best classified as | Power System Protection MCQ

Buchholz relay is best classified as:

  1. Digital relay
  2. Numerical relay
  3. Gas-actuated relay
  4. Static Analog relay

Correct answer: 3. Gas-actuated relay

Buchholz relay is a gas-actuated relay which is used in oil-immersed transformers for providing protection against different types of faults.


  1. Solid earthing a power transformer means
  2. In case of serious faults, Buchholz Relay
  3. The number of pilot wires required to protect transmission lines using Translay protection system is
  4. Earthing screen provides protection to which system against lightning strikes and which manner
  5. Long transmission lines are protected by using which type of overcurrent protection system

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