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“
.
