- Eaton UPS User's Guide

UPS WITH BYPASS ELECTRICAL INSTALLATION

Eaton 9170

UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality

UPS Installation with an External Bypass Switch

A R N I N G

Only qualified service personnel (such as a licensed electrician) should perform the electrical

installation. Risk of electrical shock.

C A U T I O N

To prevent electrical shock or damage to the equipment, verify that the Eaton 9170+ UPS is

OFF before you remove the entrance panel. The circuit breaker or disconnect switch must

also be off at the AC input service panel. Also, turn OFF the AC disconnect and bypass

switches before you connect any wires to the bypass switch terminal strip.

To install the UPS with an external bypass switch:

1. Mount the bypass switch within sight of the UPS. If you do not

have an Eaton bypass switch or the fuse box or panel is out of

sight, you must install a separate disconnect switch next to the

UPS.

The bypass switch should be mounted securely to a sturdy surface.

You may need to turn the cabinet 90 degrees (on its side) to enable

operator access to the switch handle.

2. Remove the six screws in the bypass switch front cover and

remove the cover. Remove any packing material inside the bypass

switch.

3. Remove knockouts in the bottom of the bypass switch for AC Line

Input, AC to UPS Input, AC from UPS Output, and AC to the UPS

load.

4. Unscrew and remove the rear cover(s) of the UPS (top cover on 3-

or 6-slot; top two covers on 9- or 12-slot). See Figure 14.

The entrance panel contains knockout openings for entrance and

exit conduits and for conduit to an optional external battery cabinet.

The entrance panel is located on the top 3-slot section for 3- and

6-slot cabinets; on the second section for 9- and 12-slot cabinets as

shown in Figure 14.

Wiring for optional emergency power-off (EPO) and bypass input

signals passes through the opening at the top back of the cabinet.

Wiring for an optional generator input signal must pass through a

separate opening. Installing this wiring is described in Steps 14

and 15 on page 33.