Circuit Breaker Ratings: altitude_derating_LVPCB
Circuit breaker ratings and application data per IEEE C37.06-2009 (medium/high-voltage power CBs) and IEEE Std 3004.5-2025 (low-voltage LVPCB and MCCB). Covers MV/HV preferred ratings (interrupting, TRV, close-latch), LV frame and trip-device ratings, LVPCB short-circuit ratings with and without instantaneous trip, X/R multiplying factors for fault-current derating, altitude derating factors, and MCCB electrical endurance operation counts.
| voltage class | interrupting kA | altitude ft (ft) | altitude m (m) | current rating factor (dimensionless) | standard | voltage rating factor (dimensionless) |
|---|---|---|---|---|---|---|
| altitude_derating_LVPCB | 2,000 | 6,600 | 2,000 | 1 | IEEE Std 3004.5-2025 | 1 |
| altitude_derating_LVPCB | 2,600 | 8,500 | 2,600 | 0.99 | IEEE Std 3004.5-2025 | 0.95 |
| altitude_derating_LVPCB | 3,900 | 13,000 | 3,900 | 0.96 | IEEE Std 3004.5-2025 | 0.8 |
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