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Current Unbalance Calculator — 3-Phase Maximum-Deviation Method

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5.566% current unbalance

  • Average phase current: 161.7 A
  • Maximum deviation: 9 A (Phase B)
  • Highest-to-lowest spread: 13.9 A
  • Within entered 10% review limit by 4.434 percentage points.
  • Treat current and voltage unbalance as separate measurements; do not infer one from the other.
Phase-current diagnostic
PhaseCurrentDeviation from average
Phase A165.8 A4.1 A
Phase B152.7 A9 A
Phase C166.6 A4.9 A
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  1. 1. Average = (165.8 + 152.7 + 166.6) ÷ 3 = 161.7 A.
  2. 2. Absolute deviations from average = 4.1, 9, 4.9 A; maximum = 9 A (Phase B).
  3. 3. Current unbalance = 9 ÷ 161.7 × 100 = 5.566%.
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