Equipment Failure Rates: Circuit Breaker
E12-422 to E12-730A
Equipment failure rates, MTBF, MTTR, and downtime statistics for electrical and mechanical plant equipment. Primary data from the USACE PREP reliability database (IEEE Std 3006.8-2018 Table 2), covering ~280 equipment classes. Supplemental data from IEEE motor and transformer surveys.
| equipment type | class code | description | failure rate per year (failures/year) | failures (count) | mdt hours (h) | mtbf hours (h) | mttm hours (h) | mttr hours (h) | standard | survey | unit years (unit-years) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Circuit Breaker | E12-422 | Circuit breaker, metal clad | 0.006422 | 4 | 2.37 | 1,364,063 | 2.38 | 2 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 622.9 |
| Circuit Breaker | E12-511 | Circuit breaker, oil filled, > 5 | 0.04957 | 9 | 20.6 | 176,720 | 8 | 23.75 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 181.6 |
| Circuit Breaker | E12-512 | Circuit breaker, oil filled, > 5 | 0.453205 | 631 | 30.56 | 19,329 | 28.84 | 18.98 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 1,392.3 |
| Circuit Breaker | E12-610 | Circuit breaker, SF6 filled, | 1.326315 | 418 | 42.52 | 6,605 | 51.03 | 12.81 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 315.2 |
| Circuit Breaker | E12-711 | Circuit breaker, vacuum, < 15 | 0.005832 | 3 | 0.06 | 1,501,968 | 0.05 | 5.33 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 514.4 |
| Circuit Breaker | E12-712A | Circuit breaker, vacuum, < 15 | 0.001513 | 0 | 1.84 | 7,870,965 | 1.84 | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 458.2 |
| Circuit Breaker | E12-721 | Circuit breaker, vacuum, < 15 | 0.044031 | 65 | 14.89 | 198,950 | 2.6 | 11.58 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 1,476.2 |
| Circuit Breaker | E12-722 | Circuit breaker, vacuum, < 15 | 0.039062 | 28 | 0.49 | 224,259 | 0.35 | 9.39 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 716.8 |
| Circuit Breaker | E12-730A | Circuit breaker, vacuum, > 15 | 0.138554 | 0 | — | 85,929 | — | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 5 |
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