HV Exit Exam • Set 6 Question 18 of 30
Among the following circuit breaker types, which one is typically limited to the lowest operational voltage ranges (up to 1,000 V)?
✓
Direct Answer
Option A: Air-break circuit breaker (plain break / miniature breaker)
Plain air-break circuit breakers (without high-pressure blast or vacuum bottles) are generally restricted to low-voltage applications (up to 690 V / 1,000 V).
All Options
A
Air-break circuit breaker (plain break / miniature breaker)
(Correct Answer)
B
Tank-type bulk oil circuit breaker
C
Air-blast circuit breaker
D
SF6 gas circuit breaker
Detailed Explanation & Context
Plain air-break circuit breakers (without high-pressure blast or vacuum bottles) are generally restricted to low-voltage applications (up to 690 V / 1,000 V).
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
Advertisement
Practice Full HV Set 6
Test yourself with 30 interactive questions, live timer, and instant score.