2 Functions
152
7SD610 Manual
C53000-G1176-C145-4
Figure 2-53 Logic diagram of the overvoltage protection for phase voltage
Phase-phase over-
voltage
The phase–phase overvoltage protection operates just like the phase–earth protection
except that it detects phase–to–phase voltages. Accordingly, phase–to–phase voltag-
es which have exceeded one of the stage thresholds Uph-ph> or Uph-ph>>are also
indicated. Beyond this, Figure 2-53 applies in principle.
The phase–phase overvoltage protection can also be blocked via a binary input
„>Uph-ph>(>) BLK“.
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