Functions
2.5 Distance Protection
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
146
2.5.2 Distance Protection with Quadrilateral Characteristic (optional)
A tripping characteristic in the shape of a polygon is defined for each of the distance zones.
2.5.2.1 Method of Operation
Operating polygons
In total, there are six independent zones and one additional controlled zone for each fault impedance loop.
Figure 2-52 shows the shape of the polygons as example. Zone Z6 is not shown in Figure 2-52. The first zone
is shaded and forward directional. The third zone is reverse directional.
In general, the polygon is defined by means of a parallelogram which intersects the axes with the values R and
X as well as the tilt Ï•
Dist
. A load trapezoid with the setting R
Load
and Ï•
Load
may be used to cut the area of the
load impedance out of the polygon. The axial coordinates can be set individually for each zone; Ï•
Dist
, R
Load
and
Ï•
Load
are common for all zones. The parallelogram is symmetrical with respect to the origin of the R-X-coordi-
nate system; the directional characteristic however limits the tripping range to the desired quadrants (refer to
„Direction determination“ below).
The R-reach may be set separately for the phase-to-phase faults and the phase-to-earth faults to achieve a
larger fault resistance coverage for earth faults if this is desired.
3811 Dis.TripZ1/1p OUT Distance TRIP single-phase Z1
3813 Dis.TripZ1B1p OUT Distance TRIP single-phase Z1B
3816 Dis.TripZ2/1p OUT Distance TRIP single-phase Z2
3817 Dis.TripZ2/3p OUT Distance TRIP 3phase in Z2
3818 Dis.TripZ3/T3 OUT Distance TRIP 3phase in Z3
3819 Dis.Trip FD-> OUT Dist.: Trip by fault detection, forward
3820 Dis.Trip <-> OUT Dist.: Trip by fault detec, rev/non-dir.
3821 Dis.TRIP 3p. Z4 OUT Distance TRIP 3phase in Z4
3822 Dis.TRIP 3p. Z5 OUT Distance TRIP 3phase in Z5
3823 DisTRIP3p. Z1sf OUT DisTRIP 3phase in Z1 with single-ph Flt.
3824 DisTRIP3p. Z1mf OUT DisTRIP 3phase in Z1 with multi-ph Flt.
3825 DisTRIP3p.Z1Bsf OUT DisTRIP 3phase in Z1B with single-ph Flt
3826 DisTRIP3p Z1Bmf OUT DisTRIP 3phase in Z1B with multi-ph Flt.
3827 Dis.TRIP 3p. Z6 OUT Distance TRIP 3phase in Z6
3850 DisTRIP Z1B Tel OUT DisTRIP Z1B with Teleprotection scheme
No. Information Type of In-
formation
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