Circuit Breaker Ratings: xr mccb gt20k
24 to 45
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 | 24 | MCCB gt20kA | 1 | 24 | IEEE Std 3004.5-2025 | 4.05 |
| xr mccb gt20k | 25 | MCCB gt20kA | 1 | 25 | IEEE Std 3004.5-2025 | 3.87 |
| xr mccb gt20k | 26 | MCCB gt20kA | 1 | 26 | IEEE Std 3004.5-2025 | 3.71 |
| xr mccb gt20k | 27 | MCCB gt20kA | 1 | 27 | IEEE Std 3004.5-2025 | 3.57 |
| xr mccb gt20k | 28 | MCCB gt20kA | 1 | 28 | IEEE Std 3004.5-2025 | 3.43 |
| xr mccb gt20k | 29 | MCCB gt20kA | 1 | 29 | IEEE Std 3004.5-2025 | 3.3 |
| xr mccb gt20k | 30 | MCCB gt20kA | 1 | 30 | IEEE Std 3004.5-2025 | 3.18 |
| xr mccb gt20k | 35 | MCCB gt20kA | 1 | 35 | IEEE Std 3004.5-2025 | 2.68 |
| xr mccb gt20k | 40 | MCCB gt20kA | 1 | 40 | IEEE Std 3004.5-2025 | 2.29 |
| xr mccb gt20k | 45 | MCCB gt20kA | 1 | 45 | IEEE Std 3004.5-2025 | 1.98 |
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