Figure 62 Load On Maintenance Bypass, Two Breakers; Figure 63 Load On Maintenance Bypass, Three Breakers - Liebert 1000kVA Operation & Maintenance Manual

.
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

UPS
CB1
CB2
MBD
Battery

Figure 63 Load on maintenance bypass, three breakers

Battery
RIB RIB
#3 UPS #2
CB1
R R
I I
CB2
MBD
Battery Battery
RIB RIB
UPS #3 UPS #2
CB1 CB1
R R
I I
CB2 CB2
MBD MBD
Battery Battery
RIB
UPS #1
CB1
SBS
R
SBB
I
System
CB2
Controls
Output
SCCT
MBD
(can accommodate up to 6 UPS modules)
RIB
UPS #1
CB1
SBS
R
SBB
I
System
CB2
Controls
Output
SCCT
MBD
SCCT
(can accommodate up to 6 UPS modules)
83
BIB BFB BFB
MBB
SKRU
MIB
To Critical Load
SCCT
STANDBY GENERATOR
AUTOMATIC
TRANSFER SWITCH
BFB BFB
BIB
MBB
SKRU
MIB
To Critical Load
Operation