[lo-esd-anr-20101116, 2, en_US]
Figure 2-14
Ground fault differential protection pickup, isolated/resonant-grounded system
If only the V0 voltage is connected, only parameter 1226
87N L: 3V0>
is effective. The threshold checks
87N L:Vph-g min
and
87N L:Vph-g max
(parameter 1227 and 1228) are not relevant.
You will find the logic diagram for the differential protection trip in Section
2.2.5 Differential Protection Pickup
Functions
2.2 Phase Comparison Protection and Ground Differential Protection
60
SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
Summary of Contents for SIPROTEC 4 7SD80
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