Liebert 350-500 VA - Manual (Page 10)

6
M
AJOR
C
OMPONENTS
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.
Transfer Switch
In Normal mode the Transfer Switch passes utility AC power to the
connected load. When input utility voltage or frequency is outside
acceptable limits, the transfer switch activates and transfers the UPS
to battery.
Battery Charger
In Normal mode, the Battery Charger converts utility AC power into
regulated DC power to float charge the battery. It 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.
Battery
The PowerSure PST utilizes a valve-regulated, nonspillable, lead acid
battery. To optimize battery life, operate the UPS in an ambient tem-
perature of 68°-77°F (20°-25°C).
Inverter
When utility power fails, the Inverter draws energy from the battery
and inverts it into a regulated stepped sinewave supplying power for
equipment connected to the orange receptacles.
Input Output
L
N
G
L
N
G
TVSS &
EMI/RFI
Filters
Battery
Charger
Battery Inverter
Transfer
Switch