HV Exit Exam • Set 6 Question 10 of 30
According to IEC standard specifications, the rated short-time withstand current (thermal short-circuit rating) for HV AC circuit breakers is rated for a duration of:
✓
Direct Answer
Option C: 1 or 3 seconds
Standard short-time withstand current ratings for switchgear and circuit breakers specify the thermal and electrodynamic endurance for a duration of 1 second or 3 seconds per IEC 62271-100.
All Options
A
0.01 seconds
B
0.1 seconds
C
1 or 3 seconds
(Correct Answer)
D
30 seconds
Detailed Explanation & Context
Standard short-time withstand current ratings for switchgear and circuit breakers specify the thermal and electrodynamic endurance for a duration of 1 second or 3 seconds per IEC 62271-100.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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