Eaton 93PM UPS, Installation And Operation Manual

Page: 40 / 146

UPS Installation Plan and Unpacking
3-14 Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4 www.eaton.com/powerquality
Figure 3-9. 93PM External Parallel Wire Length
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 UP S 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%.
Bypass Input to UP S Units
UP S 1
Battery
UP S 2
UP S 3
UP S 4
Output from UP S Units
Battery
Battery
Battery
1A
2A
3A
4A
1B
2B
3B
4B