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1. Introduction
This User' s manual gives basic information about IGBT and SCR (rectifier) 80 - 130
kVA, uninterruptible power supplies: their basic function, their features, how to use
them, and what to do in case of trouble. Instructions for shipping, storing, handling
and installing the equipment are also given.
The planning guidelines of this manual describe only the specific demands of UPS
units. Local legislation and regulations for electrical installations must be followed in
the UPS installation.
This manual is mainly intended for the chief operator/system supervisor, electrical
consultants and installation electricians.
The UPS system must be installed according to the instructions in this manual. Fixed
installation may be performed by qualified personnel only. Failure to recognise the
electrical hazards could prove fatal.
2. System description
A UPS (Uninterruptible Power Supply) protects different types of sensitive electrical
equipment: computers, workstations, sales terminals, critical instrumentation,
telecommunications systems, process control systems, etc. The UPS protects them from
problems associated with utility power of poor quality, or a complete loss of power.
Sensitive electrical equipment needs protection from electrical interference. Interference
from outside the facility (such as lightning, power company accidents and radio
transmissions) and interference from inside the facility (from motors, air conditioners,
vending machines and arc welders, for example) can create problems in the AC power
line for the sensitive equipment. The problems can be: power outage, low or high
voltage, slow voltage fluctuation, frequency variations, differential and common-mode
noise, transients, etc.
The UPS cleans the utility AC power, maintains a constant voltage and if needed
isolates the output to the critical load. These actions help to keep power line problems
from reaching the critical system, where they can damage software and hardware and
cause the equipment to operate erratically.
2.1 UPS features
This UPS is a double conversion on-line UPS for protection of computer systems and
other intelligent devices such as measurement instruments and industrial automation
applications. It conditions the raw mains and supplies continuous, clean three-phase
power to the critical systems. While feeding the load the UPS also keeps the battery
constantly charged. If utility power fails, the UPS will continue to supply clean power
without any interruption at the UPS output.
If the power failure outlasts the backup time the UPS will shut down in order to prevent
a total discharge of the battery. When the line voltage is restored the UPS will start up
again automatically providing power to the critical load and charging the battery bank.
1017397
Revision D (update)
80 kVA - 130 kVA UPS
User's and Installation Manual
5
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