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Inverter
Battery
Rectifier
Load
Mains
Line
filter
A. V. R.
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♦ Overvoltage protection (RJ11)
for fax, modem and phone
♦ CompuWatch software for shutdown, status messages
and measurement values for all major operating
systems (incl. Windows, Mac, Linux)
♦ Compact design / without fan
2.2 Principle of Operation
The UPS is connected to a shockproof socket between the
public utility’s mains and the loads to be protected.
Under normal operating conditions, i.e. if PROTECT A. is
supplied with mains voltage, the battery charger will ensure
that the battery is always completely charged.
During this operating status, the loads connected to
PROTECT A. are supplied with voltage via mains filters which
provide effective protection against mains voltage peaks and
high-frequency faults.
In case of sustained mains undervoltage or overvoltage within
defined ranges, the automatic voltage regulator (AVR) further
stabilises the load voltage. As a result, voltage fluctuations in
the public utility’s mains are reduced to a level which is
acceptable for the loads. This is performed without recourse
to the internal energy storage, something which in turn has a
positive effect on battery availability.
UPS Block diagram PROTECT A.
Static bypass
switch