Power Transformer
how much power does a transformer use when idle?
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Answers
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一月 26, 2026 7:16 上午 by Christopher Hansen
Idle (no-load) losses depend on transformer size. Small low-voltage units may waste fractions of a watt to a few watts, while medium and large substation transformers can incur no-load losses in the tens to hundreds of kilowatts. No-load losses are dominated by core material and geometry.