Powerware 650825 kVA Distributed Bypass Wire Length, 1A = 2A = 3A = 4A 1B = 2B = 3B = 4B

UPS SYSTEM INSTALLATION

Bypass Input to UPS Units

1A

2A

3A

4A

UPS 1

Battery

UPS 2

Battery

UPS 3

Battery

UPS 4

Battery

1B

2B

3B

4B

Output from 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 = 2A = 3A = 4A

1B = 2B = 3B = 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%.

Figure 4-19. Distributed Bypass Wire Length

4−22 EATON Powerware® 9395 UPS (650–825 kVA) Installation and Operation Manual S 164201725 Rev 2 www.powerware.com