Download Knowledge Transfer #1 The Avaya Online UPS

The Avaya Online UPS:
How it Works
www.powerware.com/avaya
Copyright© 2003 Avaya Inc. All rights reserved
The Online UPS
Essentially, there are 9 basic power problems that
can damage your telecommunications equipment:
How does Avaya’s online UPS prevent these
problems from reaching your equipment and
Power
Failure Power
Sags Power Surges
deliver
clean,
regulated power?
Brownouts Line noise
High Voltage Frequency Switching
Spikes
Variation Transients
Harmonic
Distortion
Click to continue 
Online UPS Circuitry
An online UPS isolates connected
equipment
Internal Automatic Bypass
from power problems by completely regenerating
the incoming alternating
current (AC).
AC to DC
DC to AC
Rectifier
Raw Utility
(Incoming
AC)
Inverter
Clean AC
Output
to Load
Filtering
& Surge
Suppression
Battery
Charger
Line diagram of
online UPS circuitry
Battery
Click to continue 
Converting AC to DC
Internal Automatic Bypass
Raw Utility
(Incoming
AC)
AC to DC
Rectifier
DC to AC
Inverter
Clean AC
Output
to Load
Filtering
& Surge
Suppression
Bi-Directional
Power Converter
First, incoming AC is
filtered and converted
to DC.
Battery
Click to continue 
Battery Charging
Internal Automatic Bypass
Raw Utility
(Incoming
AC)
AC to DC
Rectifier
DC to AC
Inverter
Clean AC
Output
to Load
Filtering
& Surge
Suppression
Battery
Charger
A small portion of
this DC power is used
to charge the battery.
Battery
Click to continue 
AC Power to the Load
Internal Automatic Bypass
Raw Utility
(Incoming
AC)
AC to DC
Rectifier
DC to AC
Inverter
Clean AC
Output
to Load
Filtering
& Surge
Suppression
The DC power is then
converted back to
AC power and out to
the load.
Bi-Directional
Power Converter
Battery
Click to continue 
The Result?
By regenerating the incoming utility, power problems
are completely removed. The connected load always
receives clean, sine wave power.
Power Failure
Power Sags
Brownouts
High Voltage
Spikes
Frequency
Variation
Power Surges
Line noise
Switching
Transients
Harmonic
Distortion
Click or hit escape to end 