HV Exit Exam • Set 3 Question 16 of 30
High-voltage alternating current (AC) arc interruption is primarily achieved through:
✓
Direct Answer
Option C: Both A and B
Arc extinction can be achieved by either increasing arc resistance (lengthening, cooling, splitting) or exploiting natural AC zero-current crossing (low resistance method) to deionize the contact gap.
All Options
A
High resistance interruption
B
Low resistance / zero-current interruption
C
Both A and B
(Correct Answer)
D
Magnetic attraction only
Detailed Explanation & Context
Arc extinction can be achieved by either increasing arc resistance (lengthening, cooling, splitting) or exploiting natural AC zero-current crossing (low resistance method) to deionize the contact gap.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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