ABB RELION REX640 Technical Manual page 941

1MRS759142 F
4.7.1.3 Functionality
The distance protection function DSTPDIS provides a full-scheme distance
protection function for distribution networks where three-phase tripping is allowed
for all kinds of faults.
DSTPDIS has five flexible, configurable impedance zones for protection (Z1...Z5).
Figure 521: Zones of DSTPDIS function (example 1)
Figure 522: Zones of DSTPDIS function (example 2)
The supported zone characteristic shapes are quadrilateral, mho (circular) or bullet
(quadrilateral and mho characteristics combined). Mho can be combined with
directional lines to secure directionality and to enable increased fault resistance
coverage with an offset mho circle.
REX640
Technical Manual
X
Zone Z4
Zone Z3
Zone Z2
ZL
Zone Z1
Zone Z5
X
Zon Z4 e
Zone Z3
Zone Z2
ZL
Zone Z1
Zone Z5
Protection functions
Under impedance
start charactristics
Load encroachment
area
R
Under impedance
start characteristics
Load encroachment
area
R
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