Equipment Failure Rates: Switch
E34-520A to E34-900
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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Switch | E34-520A | Switch, manual transfer, ≤ 600 | 0.001855 | 0 | — | 6,419,906 | — | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 373.8 |
| Switch | E34-610A | Switch, oil filled, ≥ 5 kV | 0.002309 | 0 | 1.38 | 5,157,129 | 1.38 | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 300.2 |
| Switch | E34-700 | Switch, pressure | 0.025372 | 169 | 16.89 | 345,267 | 3.08 | 7.04 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 6,661 |
| Switch | E34-810A | Switch, static, ≤ 600 V, 0 A to | 0.001391 | 0 | 0.03 | 8,559,953 | 0.03 | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 498.4 |
| Switch | E34-820 | Switch, static, ≤ 600 V, > 600 | 0.007693 | 1 | 0.08 | 1,138,728 | 0.05 | 2 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 130 |
| Switch | E34-830 | Switch, static, ≤ 600 V, > 1000 | 0.00368 | 1 | 3.58 | 2,380,392 | 3.47 | 24 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 271.7 |
| Switch | E34-850A | Switch, static, with insulated- | 0.045211 | 0 | — | 263,341 | — | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 15.3 |
| Switch | E34-860A | Switch, static, w/o IGBT | 0.114583 | 0 | — | 103,906 | — | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 6 |
| Switch | E34-900 | Switch, vibration | 0.003538 | 1 | 0.5 | 2,476,224 | 0.5 | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 282.7 |
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