HV Exit Exam • Set 3 Question 27 of 30
Electrical alternating current (AC) power is generated and transmitted at high voltage primarily to:
✓
Direct Answer
Option B: Minimise I²R transmission losses and reduce conductor size
Transmitting at higher voltage reduces current for a given power level (P = √3·V·I·cosφ). Lower current drastically reduces transmission line I²R heat losses and copper conductor cross-section requirements.
All Options
A
Safeguard against power theft
B
Minimise I²R transmission losses and reduce conductor size
(Correct Answer)
C
Reduce the capital cost of generator construction
D
Eliminate the need for circuit breakers
Detailed Explanation & Context
Transmitting at higher voltage reduces current for a given power level (P = √3·V·I·cosφ). Lower current drastically reduces transmission line I²R heat losses and copper conductor cross-section requirements.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).
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