Figure 2-2. Main Elements Of The Ups System; Looking Inside The Ups; Product Specifications - Eaton Powerware 9315 Operation Manual

2.3 Looking Inside the UPS

The Powerware 9315 is a continuous-duty, solid-state UPS that supports the following
equipment: process control, data processing, telecommunications/PBX, research, and
medical. The Powerware 9315 maintains power to the critical loads during commercial
electrical power brownout, blackout, overvoltage, undervoltage, and out-of-tolerance
frequency conditions.
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 2-2
shows the main elements of the UPS.
AC Input to
Rectifier/
Charger
AC Input to
Bypass
If utility power is interrupted or falls outside the parameters specified in Chapter 9,
"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 backup battery supply allows you to either transfer to an alternative
power system (such as a generator) or shut down the critical load in an orderly manner.
The operation of the UPS system is described in greater detail in Chapter 3,
"Understanding UPS Operation." Chapter 9, "Product Specifications," outlines the storage
and operating specifications for the UPS and optional battery.
EATON Powerware 9315 UPS (200–300 kVA) Operation Manual S 164201036 Rev F powerware.com
®
Rectifier/
Charger
Input
Filter
UPS Cabinet

Figure 2-2. Main Elements of the UPS System

Power Processing
Unit (PPU)
Output
Transformer
Inverter
Digital
Metering
Static
Switch
Bypass
Contactor
Getting Started
Battery Cabinet
AC Output
to Critical
Load
Output
Contactor
2-3