Equipment Failure Rates: Switchgear
E36-110 to E36-300A
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) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Switchgear | E36-110 | Switchgear, bare bus, ≤ 600 V | 0.009224 | 23 | 4.35 | 949,729 | 4.28 | 7.91 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 2,493.6 |
| Switchgear | E36-120 | Switchgear, bare bus, > 600 V | 0.00476 | 4 | 9.67 | 1,840,518 | 6.59 | 195.75 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 840.4 |
| Switchgear | E36-130 | Switchgear, bare bus, > 5 kV | 0.016746 | 15 | 1.3 | 523,105 | 1.28 | 2.27 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 895.7 |
| Switchgear | E36-210A | Switchgear, insulated bus, ≤ | 0.001372 | 0 | 3.18 | 8,677,224 | 3.18 | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 505.2 |
| Switchgear | E36-220 | Switchgear, insulated bus, > | 0.004929 | 2 | 0.78 | 1,777,272 | 0.77 | 5 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 405.8 |
| Switchgear | E36-230 | Switchgear, insulated bus, > 5 | 0.003738 | 3 | 14.43 | 2,343,760 | 14.01 | 37.33 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 802.7 |
| Switchgear | E36-300A | Switchgear, load center (free | 0.000862 | 0 | 0.59 | 13,815,200 | 0.59 | — | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 804.3 |
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators