The preferred type ofcircuit breaker(CB) to be installed in extra high voltage AC system is

by

Electrical Engineering XYZ MCQs

The preferred type of circuit breaker(CB) to be installed in extra high voltage AC system is:

  1. Vacuum CB
  2. Bulk oil type CB
  3. Air blast CB
  4. Sulphur hexafluoride CB

Correct answer: 4. Sulphur hexafluoride CB

Explanation: The preferred type of circuit breaker (CB) to be installed in an extra high voltage AC system is typically the Sulphur hexafluoride (SF6) circuit breaker. SF6 circuit breakers are widely used in extra high voltage applications. SF6 is an excellent insulating and arc-quenching medium, allowing for compact design and high interrupting capability. These circuit breakers are known for their reliability and efficiency in extinguishing arcs.

Leave a Reply