Introduction - Powerware 9155 User Manual

Chapter 1

Introduction

A parallel system with up to three uninterruptible power supplies (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 Contoller
® ®
Area Network (CAN) Bridge Card provides connectivity for system
metering and operational mode control. The parallel system consists of
two or three UPSs, each with a CAN Bridge Card and a parallel tie
cabinet.
Figure 1 shows the Powerware 9155 UPS and an optional Extended
Battery Module (EBM).
Figure 1. The Powerware 9155 UPS and EBM (2-High Cabinets Shown)
® S 1
EATON Powerware 9155 Parallel UPS (8–15 kVA) User's Guide 164201592 Rev C www.powerware.com