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Operation
! CAUTION
Instructions for operating the Maintenance Bypass circuit breakers are on the Maintenance Bypass cabinet. Make sure you understand the proper sequence before operating any circuit breaker. Operating a Maintenance Bypass circuit breaker out of sequence could cut off power to the critical load.
Figure 62 Load on maintenance bypass, two breakers
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| RIB |
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| BIB | BFB |
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UPS #3 | UPS #2 | UPS | #1 |
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CB1 |
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| SBS |
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CB2 |
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Output 
MIB
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| SCCT | |
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| To Critical Load | |
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| MBD |
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| SCCT | |
Battery | Battery | Battery | ||||||||
(can accommodate up to 6 UPS modules) | ||||||||||
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Figure 63 Load on maintenance bypass, three breakers
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| STANDBY GENERATOR | |||
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| AUTOMATIC | |||
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| TRANSFER SWITCH | ||||
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UPS #3 | UPS #2 | UPS #1 |
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CB1 |
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| BIB | |||||||||
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| R |
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| MBB | ||||||
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| System |
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CB2 |
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| SKRU | |||||||||||||
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| Output |
| MIB | |||||||||
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| SCCT |
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| To Critical Load | |||
MBD | MBD | MBD |
SCCT
Battery | Battery | Battery | (can accommodate up to 6 UPS modules) |
83
