Siemens siprotec 7SA522 - Setting Notes

2.2 Distance protection
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7SA522 Manual
C53000-G1176-C155-3
Tripping Logic The output signals generated by the individual zones are logically connected to the
output signals ´'LV*HQ7ULSµ, ´'LV7ULSS/µ, ´'LV7ULSS/µ,
“'LV7ULSS/µ, ´'LV7ULSSµ in the actual tripping logic. The single-pole in-
formation implies that tripping will take place single-pole only. Furthermore, the zone
that initiated the tripping is identified; if single-pole tripping is possible, this is also
alarmed, as shown in the zone logic diagrams (Figures 2-30 up to 2-34). The actual
generation of the commands for the tripping (output) relay is executed within the trip-
ping logic of the entire device.
2.2.4.2 Setting Notes
The trip delay times of the distance stages and intervention options which are also pro-
cessed in the tripping logic of the distance protection were already considered when
zones were set.
Further setting options which affect the tripping are described as part of the tripping
logic of the device.