HV Exit Exam • Set 5 Question 26 of 30
Standard standard impulse voltage waveforms (e.g., 1.2/50 μs lightning surge) are characterized by:
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Direct Answer
Option D: All of the above
Impulse voltages are defined by polarity, peak magnitude, front time (rise time to peak, e.g., 1.2 μs), and tail time (decay time to 50% peak, e.g., 50 μs) per IEC 60060-1.
All Options
A
Polarity (positive or negative)
B
Peak crest voltage amplitude
C
Front time (T1) and time to half-value (T2)
D
All of the above
(Correct Answer)
Detailed Explanation & Context
Impulse voltages are defined by polarity, peak magnitude, front time (rise time to peak, e.g., 1.2 μs), and tail time (decay time to 50% peak, e.g., 50 μs) per IEC 60060-1.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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