Eaton 9355 - Introduction

Eaton 9355 Tie Cabinet (20/30 kVA) Installation Guide S 164201630 Rev D www.eaton.com/powerquality
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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
®
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 Eaton 9355 UPS.
Figure 1. The Eaton 9355 UPS