Eaton 93PR - Figure 4-20: Principle of Paralleled UPS Systems (300;600 Kw)

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UP UPS 2 UPS 3 UPS4
Parallel CAN Parallel CAN Parallel CAN
Parallel Connector Parallel ConnectorParallel ConnectorParallel Connector
BUILDING
ALARM
BUILDING
ALARM
BUILDING
ALARM
BUILDING
ALARM
PULLCHAIN PULLCHAIN PULLCHAIN PULLCHAIN
COM
NO NC
COM
NO NC
COM
NO NC
COM
NO NC
COM
NO NC
COM COM
NO NC
COM
M
O
B
1
M
O
B
2
M
O
B
3
M
O
B
4
BLOCK
3 2 4 25 9 8 10 26 15 14 16 27 21 20 22 28
1 6
5
7 1 2
11
13 18
17
19 24
23
PAIRS
S 1
2121212121212121 21
NO NC NO NC
TIE CABINET
CUSTO MER
TERMINAL
CONNECTIONS
TWISTED
UPS paralleling wiring diagram – with parallel tie cabinet
Parallel CAN Parallel CAN Parallel CAN
Parallel Connector Parallel ConnectorParallel ConnectorParallel Connector
UP UPS 2 UPS 3 UPS4S 1
PULLCHAIN
21
PULLCHAIN
21
PULLCHAIN
21
PULLCHAIN
21
UPS paralleling wiring diagram – without parallel tie cabinet
1A
1C
1B
1C
2A
2C
2B
2C
3B
3C
4B
4C
3A
3C
4A
4C
UPS 1
UPS 1
UPS 2
UPS 2
UPS 3
UPS 3
UPS 4
UPS 4
Outputs from
UPSs
Outputs from
UPSs
Bypass inputs
to UPSs
REC inputs
to UPSs
Battery
Battery
Battery
Battery
Battery
Battery
Battery
Battery
Parallel UPS system connections
Figure 4-20: Principle of Paralleled UPS Systems (300/600 kW)