HV Exit Exam • Set 6 Question 6 of 30
Under standard electrical terminology and IEC standards, Low Voltage (LV) circuit breakers have a rated operating voltage of up to:
✓
Direct Answer
Option C: 1,000 V AC (or 1,500 V DC)
IEC 60947 defines Low Voltage as nominal voltages up to and including 1,000 V AC or 1,500 V DC. Above 1,000 V AC is classified as High Voltage / Medium Voltage.
All Options
A
220 V
B
440 V
C
1,000 V AC (or 1,500 V DC)
(Correct Answer)
D
10,000 V
Detailed Explanation & Context
IEC 60947 defines Low Voltage as nominal voltages up to and including 1,000 V AC or 1,500 V DC. Above 1,000 V AC is classified as High Voltage / Medium Voltage.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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