Eaton Electrical Powerware 9315 operation manual Looking Inside the UPS, Power Processing Unit PPU

Getting Started

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.

Battery Cabinet

AC Input to Rectifier/ Charger

AC Input to Bypass

	Power Processing
	Unit (PPU)	Output
		Transformer
		Output
Rectifier/	Inverter	Contactor
Charger
Input	Digital
Filter
	Metering
	Static
	Switch

Bypass

Contactor

UPS Cabinet

Figure 2-2. Main Elements of the UPS System

AC Output to Critical Load

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 2-3