HV Exit Exam • Set 3 Question 11 of 30

Which of the following circuit breakers provides high operating reliability and minimal maintenance requirements?

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Direct Answer

Option B: SF6 gas circuit breaker

Sulphur Hexafluoride (SF6) circuit breakers operate in a sealed, non-corrosive environment with high dielectric regeneration, resulting in minimal contact erosion and extended maintenance intervals.

All Options

Air blast circuit breaker

SF6 gas circuit breaker (Correct Answer)

Vacuum circuit breaker

Bulk oil circuit breaker

Detailed Explanation & Context

Sulphur Hexafluoride (SF6) circuit breakers operate in a sealed, non-corrosive environment with high dielectric regeneration, resulting in minimal contact erosion and extended maintenance intervals.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).

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