7
MAJOR COMPONENTS
Transient Voltage Surge Suppression (TVSS) & EMI/RFI
Filters
These UPS components provide surge protection and filter electro-
magnetic interference (EMI) and radio frequency interference (RFI).
They minimize surges or interference present in the utility line and
keep the sensitive equipment protected.
Automatic Voltage Regulator
The Automatic Voltage Regulator (AVR) protects connected equip-
ment from power spikes and other abnormalities by raising an under-
voltage (boost) and lowering an overvoltage (buck) as needed. This
keeps the UPS output voltage within the connected equipment’s toler-
ance and accommodates wide utility voltage fluctuations without uti-
lizing the batteries.
Bi-Directional Converter
In normal operation, the Bi-Directional Converter changes utility AC
power into regulated DC power to “float charge” the battery system.
This converter is continuously charging the battery whenever the UPS
is plugged into a power outlet and utility power is within acceptable
limits—even if the UPS is turned OFF.
When utility power fails, the Bi-Directional Converter draws energy
from the battery and inverts it into a regulated stepped sinewave sup-
plying power for equipment connected to the orange receptacles.
Battery
The PowerSure PSA utilizes valve-regulated, nonspillable, lead acid
batteries. To optimize battery life, operate the UPS in an ambient
temperature of 68°-77°F (20°-25°C).
TVSS &
EMI/RFI
Filters
Automatic
Voltage
Regulator
Battery
Bi-Directional
Converter
Input Output
G
N
L
G
N
L
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