Eaton Power Xpert 9395 550/275 Installation And Operation Manual page 69

UPS System Installation
Figure 14. Distributed Bypass Wire Length
Bypass Input to UPS Units
NOTE Required parallel system wiring length must be equal to ensure approximately equal current sharing when in Bypass mode. For proper
operation the following must be true:
1A + 1B = 2A + 2B =
3A + 3B = 4A + 4B
NOTE Any difference in wire length will result in decreased capacity of the UPS system while on bypass. For example, a 10% difference
between the longest and shortest wire lengths will result in a decrease in bypass capacity of 10%.
48 Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201716—Rev 14
1A
2A
3A
4A
UPS 1
Battery
UPS 2
Battery
UPS 3
Battery
UPS 4
Battery
Output from UPS Units
1B
2B
3B
4B