Applications
9.5 Protection against short-time voltage dips
SITOP PSU8200 3ph
Manual, 11.2014, C98130-A7638-A1-2-7629
51
9.5
Protection against short-time voltage dips
In the case of a drop in the line-side supply voltage, the SITOP PSU8200 power supply can
still maintain the output voltage for a short time in the millisecond range (see section
Technical data (Page 29)).
For line supplies that manifest frequent brief voltage dips, in order to increase the power
supply reliability, it may make sense to increase the line buffering time in the device using an
additional SITOP PSE201U buffer module.
The SITOP PSE201U buffer module, based on electrolytic capacitors, is connected in
parallel to the 24 V power supply output (Figure 9-6 Buffering brief power failures using the
SITOP PSE201U buffer module (Page 51)). The buffer time is 200 ms at 40 A up to 1.6 s for
a load current of 5 A. This time can be increased a multiple number of times by connecting
buffer modules in parallel; the maximum buffer time is 10 s.
You can find additional information at:
SITOP PSE201U manual (
http://support.automation.siemens.com/WW/view/en/41129219
Figure 9-6
Buffering brief power failures using the SITOP PSE201U buffer module
