Xtreme Power Conversion Corporation
T90 User’s Manual
Page 8
Uninterruptible Power Supply
Introduction
The information provided in this manual covers single phase T90 700–3000VA, uninterruptible power systems,
their basic functions, operating procedures, and emergency situations, also including information on how to ship,
store, handle and install the equipment. Only detailed requirements of the UPS units are described herein, and
installation must be carried out in accordance with this manual. Electrical installations must also carefully follow
local legislation and regulations. Only qualified personnel should conduct these installations as failure to acknowl
-
edge electrical hazards could prove to be fatal.
Product Description
Several different kinds of sensitive electrical equipment stay protected by a UPS (Uninterruptible Power System)
including computers, workstations, process control systems, telecommunications systems, sales terminals, other
critical instrumentation, etc. The purpose of the UPS is to protect these systems from poor quality utility power,
complete loss of power, or other associated problems.
Electrical interference abounds in many forms causing problems in AC power, from lightning, power company ac
-
cidents and radio transmissions to motors, air conditioners, and vending machines, among others. So protection of
sensitive electrical equipment is vital to protect against power outages, low or high voltage, slow voltage fluctua
-
tions, frequency variations, differential and common-mode noises, transients, etc.
In order to prevent power line problems reaching critical systems causing damage to software, hardware and
causing equipment to malfunction, the UPS helps by maintaining constant voltage, isolating critical load output if
needed, and cleaning the utility AC power.
Double Conversion Online Technology
A double conversion on-line technology UPS provides completely isolated, clean, uninterrupted single-phase pow
-
er to your critical systems, while maintaining the batteries for their maximum potential. In the event that the
power failure lasts longer than the UPS backup time, the UPS will shut down avoiding battery damage. When the
input AC voltage returns, the UPS will automatically return online to recharge the batteries.
As shown in block diagram:
• An input filter reduces transients on the mains
• For maintaining full battery charge, AC-power is rectified and regulated in the rectifier feeding power to
the inverter and battery converter.
• DC power is converted to AC in the inverter passing it on to the load.
• Power is maintained from the battery during a power failure.
• The converter increases voltage appropriately for the inverter
