4Powerware 9315 (200 kVA---300kVA) Opera tion
164201036 Rev.D 041500
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.
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 2 shows the main elements of the UPS.
BATTERYCABI NET
OUTPUT
DIGITAL
BYPASS
AC INPUT TO
AC INPUT TO
AC OUTPUT
INPUT
RECTIFIER/ INVERTER
FILTER
CONTACTOR
METERING
CONTACTOR
RECTIFIER/
BYPASS
TOCRITICAL
CHARGER
STATIC
SWITCH
CHARGER
UPS CABINET
LOAD
TRANSFORMER
OUTPUT
POWER PROCESSING UNIT
Figure 2. Main Elem ents 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 periodof time or until the utility power returns.
For extended power outages, the backupbattery supply allows you to either
transfer to an alternative power system (such as a generator) or shut down your
critical load in an orderly manner.
The operation of the UPS system is described in greater detail in Chapter 3,
“Understanding UPS Operation.” Chapter 10, “Product Specifications,” outlines
the storage and operating specifications for the UPS and optional battery.