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Chapter 7
Understanding UPS Operation
7.1 Looking Inside the UPS System
The Powerware 9390 UPS is a
480 Vac),
The basic system consists of a rectifier, battery converter, inverter, monitoring/operation control panel, integrated communication server, and digital signal processor (DSP) logic.
In this manual, the power required by your equipment is called the critical load. The UPS supplies the critical load with conditioned power that is synchronized with your utility power. Figure
Battery Breaker
Battery
Battery
Converter
AC Input to Rectifier/ Charger
Input
Contactor
K1
Rectifier
Output
Contactor
K3
Inverter
Power Module
AC Input to Bypass
Backfeed
Protection
Contactor
K5
Digital
Metering
Static
Switch
UPS Cabinet
AC Output to Critical Load
Figure 7-1. Main Elements of the UPS System
EATON Powerware® 9390 UPS |