IV404E Rev.000 SIEL S.p.A.
Issue date: 2017-06-05 Pag. 51 di 90 + FR
3.10 Components of the block diagrams
The SAFEPOWER EVO HFT is made up of the following sub-assemblies:
IGBT RECTIFIER
This represents the input stage and its function is to convert the alternating voltage of the power supply
line into direct voltage.
Rectifier start-up can be programmed from the
display panel. The following in particular can be
set:
The delay in start-up t0
–
t1;
(this allows a non simultaneous start-up of several
UPSs connected to the same mains);
The time for the start-up, t1
–
t2;
(this avoids oversizing any generator that may be located at the UPS input).
The rectifier carries out the following functions:
-
feeds the inverter with direct voltage;
-
automatically charges the battery;
-
optimizes the input power factor by means of an automatic charging system.
The system for the cyclical recharging of the battery has two phases.
input
current
t
input
voltage
t
black out
t
t
0
1
t
2
setting
setting
