Eaton 9395C-1000/1000, Installation And Operation Manual

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Eaton
®
Power Xpert
®
9395C UPS Installation and Operation Manual P-164000821—Rev 01 www.eaton.com/powerquality 6-1
Chapter 6 Understanding UPS Operation
6.1 UPS System Overview
The Eaton Power Xpert 9395C-1100 UPS is a continuous-duty, solid-state, transformerless (at 480 Vac),
three-phase, true online system that provides conditioned and uninterruptible AC power to the UPS system's
output and critical load.
The basic system consists of a rectifier, battery converter, inverter, monitoring/operation control panel,
integrated communication server, and digital signal processor (DSP) logic. Figure 6-1 shows the main elements
of the UPS system.
If utility power is interrupted or falls outside the parameters specified in Chapter 10, “Product Specifications”
the UPS uses a backup battery supply to maintain power to the critical load for a specified period of time or
until the utility power returns. For extended power outages, the UPS system allows you to either transfer to an
alternative power system (such as a generator) or shut down your critical load in an orderly manner.
Figure 6-1. Main Elements of the UPS System
Battery
Battery
Breaker
Battery
Converter
Input
Contactor
K1
AC Input to
Rectifier/
Charger
AC Input to
Bypass
Power Module
Inverter Rectifier
Digital
Metering
Static
Switch
AC Output
to Critical
Load
UPS Cabinet
Battery System