SITOP PSU100C
Operating Instructions, 06.2013, C98130-A7599-A1-2-7629
47
Applications
9
9.1
Parallel connection to increase the power rating
To increase the power rating, two identical power supplies SITOP PSU100C, with the
exception of 6EP1331-5BA00 and 6EP1332-5BA20, can be directly connected with one
another galvanically.
The following must be observed:
●
The output voltages of the power supplies to be connected in parallel may differ by a
maximum of 0.2 % under no load conditions.
When required, the output voltages must be adjusted with the potentiometer.
To do this, the "–" terminals should be connected, and under no-load conditions, the
voltage difference measured between the "+" terminals that have not been connected
together. This voltage difference must not exceed 0.2%.
●
The cables connected to each power supply at terminals "+" and "-" must have identical
lengths and the same cable cross-sections (or the same impedance) up to a common
external network junction (terminal strip) if possible.
●
The power supplies connected in parallel must be switched on simultaneously with a
common switch in the line feeder cable (e.g. with the main switch available in control
cabinets).
SITOP
+
AC
DC
-
SITOP
+
AC
DC
-
+
-
SITOP
+
AC
DC
-
SITOP
+
AC
DC
-
&255(&7
,1&255(&7
/2$'
/2$'
7
H
UP
LQDO
E
OR
F
N
Figure 9-1
Parallel connection
Note
The power-up of two SITOP PSU100C (2 × Ia,rated) power supplies is only permissible with
the basic rated load (Ia, rated).
