Powerware 9155 UPS-Mounted Bypass Switch User’s Guide
Introduction
The Maintenance Bypass Module (MBM) and Power Distribution Module (PDM) are designed to work with an 8–15 kVA Powerware® 9155 uninterruptible power system (UPS). Both modules provide a Make-Before-Break (MBB) wrap-around bypass for UPS maintenance or service without shutting down the load. The PDM also comes equipped with several different types of output receptacles.
UPS-Mounted Bypass Switch Installation
This chapter describes the Maintenance Bypass Module (MBM) and Power Distribution Module (PDM) installation. Both modules have a Make-Before-Break (MBB) maintenance bypass switch.
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. To attach the optional MBM/PDM to the UPS:
- Remove the connecting plate between the top cabinet and the cabinet below it on the UPS rear panel (see Figure 1). Discard the plate. Retain the screws for later use.