Circuit Breaker Ratings: xr_mccb_gt20k
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_mccb_gt20k | 4 | MCCB_gt20kA | 1.23 | 4 | IEEE Std 3004.5-2025 | 24.98 |
| xr_mccb_gt20k | 5 | MCCB_gt20kA | 1.22 | 5 | IEEE Std 3004.5-2025 | 19.97 |
| xr_mccb_gt20k | 6 | MCCB_gt20kA | 1.2 | 6 | IEEE Std 3004.5-2025 | 16.64 |
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