20
21
-1
1
40
Power Supply PS1000-A6-48.5
Application Notes
25.8
Charging of Batteries
The power supply can be used to charge lead-acid or maintenance free batteries
(SLA or VRLA batteries). Four 12V batteries are needed in series.
Charging Batteries
1.
Set output voltage (measured at no load and at the battery end of the cable) very precisely
to the end-of-charge voltage, see table below.
2.
Use a 10A or 12A circuit breaker (or blocking diode) between the power supply and the battery.
3.
Ensure that the output current of the power supply is below the allowed charging current
of the battery.
4.
Use only matched batteries when putting 12V types in series.
5.
Ensure that the ambient temperature of the power supply stays below 40°C.
6.
The return current to the power supply (battery discharge current is typ. 1.8mA when the power
supply is switched off (except in case a blocking diode is utilized).
25.9
Two Phases Operation
The power supply can also be used on two-phases of a three-phase-system.
Such a phase-to-phase connection is allowed as long as the supplying voltage
is below 240V
+10%
.
Figure 25.7 Two phases operation
End-of-charge voltage
55.6V
55.0V
54.3V
53.6V
Battery temperature
10°C
20°C
30°C
40°C
240V
+1
0%
m
ax
.
L2
L1
L3
L
N
PE
Power Supply
AC
DC
