23
1
5
9
3
7
11
2
6
10
4
8
12
13
14
8 – Operating Modes
(continued)
8-5 Online Mode (Parallel UPS)
Parallel redundancy (1+1) provides UPS system redundancy or
increased total capacity. Under parallel redundancy, the total load is
shared by two UPS systems. If one of the UPS systems malfunctions,
the total connected equipment load is supported by the remaining UPS
system. If the total load exceeds the capacity of the remaining UPS
system, it will switch to auto bypass mode.
8-6 Battery Backup Mode (Parallel UPS)
Similar to on battery backup mode for a single UPS system (
Section
8-2
), except the total connected equipment load is shared by the parallel
(1+1) UPS systems.
8-7 Auto Bypass Mode (Parallel UPS)
Similar to auto bypass mode for a single UPS system (
Section 8-3
),
except with parallel (1+1) UPS systems.
CB1
CB3
CB4
CB5
LOAD
MAIN
STS
CB2
XFMR
XFMR
CB1
CB3
CB4
CB5
MAIN
STS
CB2
XFMR
XFMR
UPS1
UPS2
CB1
CB3
CB4
CB5
LOAD
MAIN
STS
CB2
XFMR
XFMR
CB1
CB3
CB4
CB5
MAIN
STS
CB2
XFMR
XFMR
UPS1
UPS2
CB1
CB3
CB4
CB5
LOAD
MAIN
STS
CB2
XFMR
XFMR
CB1
CB3
CB4
CB5
MAIN
STS
CB2
XFMR
XFMR
UPS1
UPS2