Chapter 6 UPS-Mounted Bypass Switch Installation

This chapter describes the Maintenance Bypass Module and Power

Distribution Module installation. Both modules have a

Make-Before-Break Maintenance Bypass switch.

Maintenance Bypass/Power Distribution Module Setup

If you purchased an optional MBM/PDM, attach the module to the UPS before any wiring installation. All hardware is supplied in the accessory kit. Use the following procedure to attach the optional MBM/PDM to the UPS:

1.Remove the connecting plate between the top cabinet and the cabinet below it on the UPS rear panel (see Figure 13). Discard the plate. Retain the screws for later use.

2.Remove the lowest top cover screw on each side of the UPS and discard.

Lowest Top Cover

Screw (one each side)

Connecting Plate (8 screws)

Figure 13. UPS Rear View (2-High Cabinet Shown)

Powerware® 9155 UPS (8–15 kVA) User’s Guide S 164201553 Rev D www.powerware.com

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