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Installation Drawings
8
Figure 3
Two-Breaker Maintenance Bypass Cabinet, two-input, attached
Figure 4
Two-Breaker Maintenance Bypass Cabinet, three-input, attached or detached
Battery
System
DC Bus
Critical
Load
BFB
CB2
CB1
MBD
MBB
MI
B
FBO
FBO
UPS Module
Two Breaker Maintenance Bypass Cabinet
Main Input
Switchgear
I
Load Bank
(FBO)
N
EG
MBJ
MIB - Maintenance Isolation Breaker
BIB - Bypass Input Breaker
MBB - Maintenance Bypass Breaker
FBO – Furnished By Others
N – Neutral
EG – Equipment Ground
MBJ – Main Bonding Jumper (3-wire systems only)
BIB - Bypass Input Breaker
MBB - Maintenance Bypass Breaker
FBO – Furnished By Others
N – Neutral
EG – Equipment Ground
MBJ – Main Bonding Jumper (3-wire systems only)
- Option Interlock
I
Battery
System
Critical
Load
BFB
CB2
CB1
MBD
MBB
MI
B
FBO
FBO
UPS Module
Two Breaker Maintenance Bypass Cabinet
Main Input
Switchgear
I
FBO
Load Bank
(FBO)
MIB - Maintenance Isolation Breaker
BIB - Bypass Input Breaker
MBB - Maintenance Bypass Breaker
FBO – Furnished By Others
N – Neutral
EG – Equipment Ground
MBJ – Main Bonding Jumper (3-wire systems only)
BIB - Bypass Input Breaker
MBB - Maintenance Bypass Breaker
FBO – Furnished By Others
N – Neutral
EG – Equipment Ground
MBJ – Main Bonding Jumper (3-wire systems only)
- Option Interlock
I
DC Bus
N
EG
MBJ