MGE UPS Systems UPS 500 User Manual page 21

E N G L I S H
Introduction
Thank you for your purchase of the Ellipse
Premium "UPS" from MGE. The Ellipse
Premium "UPS" will provide many years of
accurate, trouble-free power protection for
your PC and/or other device(s). Please read
this manual fully, to familiarize yourself with
the safety and many other features of the
Ellipse Premium product.
MGE UPS Systems
MGE, one of the largest UPS manufacturers in
the world, has a power protection solution for
every power problem. Our product range
includes UPSs 220 VA to over 4.5 MVA in
single and three phase configurations. Other
products include Power Management
Software, DC to AC inverters, line conditioners
and isolation transformers. Contact your sales
representative today for additional information
about MGE's other fine products. Our web
address is: www.mgeups.com
Why the Need for Uninterruptible Power?
PCs and other electronic devices, due to their
design, are subject to the effects of power
outages or short interruptions. They do not
store sufficient energy to overcome outages or
short interruptions and these events occur on a
daily basis. Any interruption of the utility power
will stop the operation of a computer and cause
loss of data, potential hardware damage and
inconvenience.
A "UPS" is an uninterruptible power supply.
The UPS has an internal battery to provide
power back-up when the utility power is lost or
a short outage occurs. In addition, the Ellipse
Premium UPS provides surge protection from
indirect lightning strikes, power surges and
short high voltage transients (spikes) created
by machinery or common office equipment. A
fax/modem (with cable) or network suppressor
is provided with every MGE Ellipse Premium
UPS to also protect the incoming data line to
the PC.
Theory of Operation
Ellipse Premium is a line interactive UPS
which normally operates in the bypass
mode. Surge suppression and filtering are
also provided in this mode.
page 2
The UPS transfers on boost mode in the
event of input voltage drop. This operation is
provided from 84 V to 100 V input voltage.
The UPS transfers the load quickly to the
battery when a power failure occurs. If the
power returns before the battery is
exhausted, the operation returns to normal
and the battery is recharged.
The Ellipse Premium UPS is comprised of
three major systems: the inverter, the battery
charger/ battery and the bypass.
All logic and supervision in the UPS are
provided by a state-of-the-art
controller.
Inverter
The inverter is the heart of the UPS and
inverts direct current (DC) from the battery
into alternating current (AC) at 120 volts.
The DC voltage from the batteries is
switched on and off at a high frequency and
transformed to a higher voltage (DC to DC
conversion). After conversion, the high
voltage is converted into a pseudo-sine
wave by a pulse width modulated (PWM)
inverter to 120 volts AC RMS. This unique
MGE technique, eliminates all bulky 60 HZ
components and reduces size, heat, and
greatly enhances reliability.
Battery Charger/Battery
The battery charger maintains the battery
and the battery provides the source of back-
up energy when a power failure occurs. The
battery charger converts 120 volt AC utility
power to filtered and regulated DC specific
for battery charging. The battery is a
recombinant, sealed, lead acid-type which
provides the high current required for UPS
use and long life. It requires no additions of
water during its life.
Bypass
The bypass is the electro-mechanical
hardware providing a transfer to or from the
inverter. This is done rapidly and
synchronized to the utility power sine wave
in order to provide continuity to the PC and
not cause a re-boot.
3400724000 MGE UPS Systems
Notes
micro-
MGE UPS Systems
P O R T U G U Ê S
Ellipse Premium User's Manual
page 9