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Current Unbalance Calculator — 3-Phase Maximum-Deviation Method
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 | Deviation from average |
|---|---|---|
| Phase A | 165.8 A | 4.1 A |
| Phase B | 152.7 A | 9 A |
| Phase C | 166.6 A | 4.9 A |
Show the working
- 1. Average = (165.8 + 152.7 + 166.6) ÷ 3 = 161.7 A.
- 2. Absolute deviations from average = 4.1, 9, 4.9 A; maximum = 9 A (Phase B).
- 3. Current unbalance = 9 ÷ 161.7 × 100 = 5.566%.
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