Eaton Powerware 9355 - Parallel UPS Wiring

ELECTRICAL INSTALLATION
EATON Powerware
®
9355 UPS (20/30 kVA) Installation and Operation Manual S 164201626 Rev B www.powerware.com
26
Parallel UPS Wiring
To hardwire the UPS in a parallel capacity and/or redundant system:
1. Remove the UPS conduit landing box from the rear panel and retain (see
Figure 14).
2. Punch two holes in the conduit landing box for the input and output conduit using
a Greenlee punch or similar device.
3. Route the wiring from the back of the UPS, through the wiring tray, to the front
of the UPS.
4. Hardwire the input terminations for the UPS. See Table 1 on page 34 for wiring
specifications.
For a detailed view of the UPS terminal block, see Figure 21 on page 35. See
Figure 15 for a parallel wiring diagram.
5. Remove any Tie Cabinet covers and install conduit for the Tie Cabinet.
6. Hardwire the output terminations from the UPS to the Tie Cabinet.
7. Hardwire the load to the Tie Cabinet.
8. Wire the maintenance bypass auxiliary contacts below the maintenance bypass
switch and terminate to the maintenance bypass wires in the Tie Cabinet.
From UPS 4 Output
From UPS 3 Output
From UPS 2 Output
Red Wires
(open when breaker is open)
Bypass Input
Black Wires
(common)
From UPS 1 Output
350A
110A (4X)
LOAD
Blue Wires
(closed when breaker is open)
350A Breaker
Auxiliary Contacts
Figure 15. Parallel Wiring Diagram