Circuit Breaker Ratings: xr lvpcb fused
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 | breaker type | multiplying factor (dimensionless) | power factor pct (%) | standard | xr ratio (dimensionless) |
|---|---|---|---|---|---|---|
| xr lvpcb fused | 50 | LVPCB fused | 1 | 50 | IEEE Std 3004.5-2025 | 1.73 |
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