Physics · Power Systems
What is the correct empirical formula for the most economical line voltage (V in kV) between lines in a 3-phase transmission system, where L is the length of the line in km and P is the maximum power per phase in kW delivered in a single circuit?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1V = 5.5(L/1.6 + 3P/100) 2
- 2V = 5.5(L/1.6 + P/100) 0.5✓
- 3V = 5.5(L/0.62 + 3P/100) 2
- 4V = 5.5(L/1.6 + 3P/100) 0.5
Correct answer
V = 5.5(L/1.6 + P/100) 0.5
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