COVER HS Series – User manual
COMEX S.A.
27
3
UPS operating modes
This chapter describes the basic operating modes of the UPS, battery management and
protection.
Warning: There are dangerous voltages - mains and batteries inside the UPS
There are no user serviceable parts inside the UPS. Only the manufacturer's authorized
service provider has the opportunity to open the UPS.
3.1
Introduction
There are no user serviceable parts inside the UPS. Only the manufacturer's authorized service
provider has the opportunity to open the UPS.
Achieving high quality parameters guarantees high frequency dual pulse width modulation
(PWM), all controlled by digital signal processing (DSP), which ensures high reliability and ease
of use.
3.2
Principle of operation
As shown in the figure below, the power supply from the professional network feeds the UPS.
The rectifier transforms the AC voltage into DC. The constant voltage powers the inverter circuit,
which reprograms the DC voltage to a stable AC voltage that is completely independent of the
input voltage. In the absence of mains voltage, the inverter circuit is powered from the battery.
In case of maintenance work, or in case of overload, overheat or other events on the UPS, a
backup power supply is used. Bypass.
Main Input
Static Switch
Manual Bypass
Load
Battery
Bypass Input
Output Switch
Rectifier/
Discharger
Charger
Inverter
Figure 3-1 Block diagram of the power supply
警告
危 险
Bypass ręczny serwisowy
Wejście bypass
Wejście Prostownik
Wyjście UPS
Baterie
