Introduction; System Description; Feature: Active-Front Technology - Eaton Powerware 9155 UPS20-30kVA User Manual

2 Introduction

The product described in this manual is a transformerless Uninterruptible Power System
(UPS). It is a true online, continuous duty, double conversion, solid state, three-phase system,
providing conditioned and uninterruptible AC power to protect the customer's load from all nine
power failures.
System description
The UPSs are used to protect sensitive IT equipment and prevent loss of valuable electronic
information, minimise equipment downtime, and minimise the adverse effect on production
equipment due to unexpected power problems.
The UPS system continually monitors incoming electrical power and removes the surges,
spikes, sags, and other irregularities that are inherent in commercial utility power. Working with
a building's electrical system, the UPS system supplies clean, consistent power that sensitive
electronic equipment requires for reliable operation. During brownouts, blackouts, and other
power interruptions, batteries provide emergency power to safeguard operation.
The UPS system is housed in freestanding cabinets. The cabinets line up and match in style and
colour, and have safety shields behind the doors for hazardous voltage protection.
Figure 1 UPS cabinet 20-30 kVA, 50/60 Hz (1-phase output), with an External Battery Cabinet.
Feature: Active-Front Technology
Traditional input THD filters are no longer needed with this UPS product. The built-in advanced
rectifier technology of UPS modules provides perfect sinusoidal input power quality at 0.99
input power factor with harmonic content less than % THD(i). This leads to more reliable total
system operation and savings in generator and transformer sizing as losses in the windings are
minimised.
1026743
Revision B
UPS 20-30 kVA, 230 V 0/60 Hz output
User's Guide
7