Powerware 9155 User Manual page 9

Introduction
The following options for the Powerware 9155 are available:
Maintenance Bypass Module (MBM)
The optional MBM is installed on the UPS rear panel and is used to
bypass the UPS during maintenance or servicing. The Maintenance
Bypass switch on the MBM provides a Make-Before-Break (MBB)
wrap-around bypass for UPS service without shutting down the load.
Power Distribution Module (PDM)
The optional PDM provides the same functionality as the MBM and
also comes equipped with several different types of output
receptacles.
Wall-Mounted Bypass Switch
The optional wall-mounted bypass switch is used to bypass the UPS
during maintenance or servicing, providing wrap-around bypass for
UPS service without shutting down the load.
Parallel Tie Cabinet
A parallel system with up to three UPSs can be installed to provide a
parallel capacity and/or redundant system. This load sharing system
provides more capacity than a single UPS and can provide backup,
depending on the load and configuration. In addition, when one UPS
is taken out of service for maintenance or is not operating properly, a
redundant UPS continues to supply uninterrupted power to the critical
load. A parallel Powerware Hot Sync Computer Area Network (CAN)
Bridge Card provides connectivity for system metering and operational
mode control. The parallel system consists of two to three UPSs, each
with a parallel CAN Bridge Card, and a parallel tie cabinet. Refer to
the Powerware 9155 Parallel UPS (8–15 kVA) User's Guide for more
information.
Input Isolation Transformer
The optional input isolation transformer is located at the bottom of a
3-high UPS model. The input isolation transformer provides a neutral
from a 208V or 240V input source with 240V output and can be wired
to the UPS or to an MBM/PDM.
Seismic Kit
The seismic kit secures the UPS and optional EBMs for Zone 4 seismic
installations.
3
Powerware 9155 UPS (8–15 kVA) User's Guide 164201553 Rev D www.powerware.com
® S