Eaton Powerware 9355 Parallel Installation Guide download pdf (Page 21)

TIE CABINET INSTALLATION

Eaton 9355 Tie Cabinet (20/30 kVA) Installation Guide S 164201630 Rev B www.eaton.com/powerquality

22. Wire the maintenance bypass auxiliary contacts and terminate to the

maintenance bypass wires in the Tie Cabinet (see Figure 6 on page 12).

Connect the black and the red wire to TB4 on the UPS (see Figure 9). Cap the

blue wire.

NOTE The maintenance bypass contacts are normally-open. To ensure proper bypass operation, DO NOT

use the blue wire (it is normally-closed).

NOTE There are two sets of maintenance bypass wires; you can terminate to either set. If you are

installing four UPSs, it is recommended to terminate two UPSs to one set of wires and two UPSs to the other

set of wires.

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 9. Parallel Wiring Diagram

23. Reinstall the UPS wiring access cover.

24. Reinstall the UPS conduit landing box in the reversed position.

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Eaton Powerware 9355 Parallel Installation Guide Page 21