Functions
2.8 Undervoltage and Overvoltage Protection 27/59 (Optional)
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
117
Figure 2-46 Logic diagram of the overvoltage protection for phase voltage
Overvoltage Phase-to-Phase
The phase-to-phase overvoltage protection operates just like the phase-to-ground protection except that it
detects phase-to-phase voltages. Accordingly, phase-to-phase voltages which have exceeded one of the
element thresholds 59-1-Vpp PICKUP (address 3712) or 59-2-Vpp PICKUP (address 3714) are also indi-
cated. Apart from that, Figure 2-46 also applies generally.
The phase–phase overvoltage protection can also be blocked via a binary input „>59-Vphph BLOCK“.
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