Powerware Tie Cabinet Powerware 9355 - Manual (Page 7)

EATON Powerware ® 9355 Tie Cabinet (20/30 kVA) Installation Guide S 164201630 Rev A www.powerware.com 1
Chapter 1 Introduction
A Tie Cabinet can be installed as a wall-mounted bypass or to provide support for a
parallel system for redundancy or extra capacity.
A 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.
A parallel (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 ® Controller Area Network (CAN) Bridge Card provides connectivity for
system metering and operational mode control. The parallel system consists of two to
four UPSs, each with a parallel CAN Bridge Card and a parallel cabinet.
Figure 1 shows the Powerware 9355 UPS.
Figure 1. The Powerware 9355 UPS