HV Exit Exam • Set 6 Question 21 of 30
In a High Rupturing Capacity (HRC) fuse, the time elapsed between initial fuse element melting (cut-off) and final arc extinction at current zero is known as the:
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Direct Answer
Option B: Arcing time
Total operating time of a fuse equals Pre-arcing time (time for element to melt) plus Arcing time (time between element vaporization and final current zero extinction).
All Options
A
Pre-arcing time
B
Arcing time
(Correct Answer)
C
Total clearing time
D
Thermal relaxation time
Detailed Explanation & Context
Total operating time of a fuse equals Pre-arcing time (time for element to melt) plus Arcing time (time between element vaporization and final current zero extinction).
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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