![background image](http://html1.mh-extra.com/html/abb/relion-670-series/relion-670-series_applications-manual_3052129298.webp)
Resistive reach
M13142-156 v4
The resistive reach in reverse direction must be set longer than the longest reverse zones. In
blocking schemes it must be set longer than the overreaching zone at remote end that is used
in the communication scheme. In equation
the index ZmRv references the specific zone to
be coordinated to.
min
ZmRv
RFRvPE
1.2 RFPE
³
×
EQUATION1316 V1 EN-US
(Equation 296)
7.10.3.3
Phase-to-phase fault in forward direction
M13142-168 v2
Reactive reach
M13142-170 v3
The reach in reactive direction is determined by phase-to-earth reach setting
X1. No extra
setting is required.
Resistive reach
GUID-01D7AB58-12CD-44EB-89E4-4D11828141D1 v1
R1PE and R0PE must be set in a way that the loop characteristic angle can be 60 deg (this gives
a characteristic angle of 90 deg. at three-phase faults). If the 500-series characteristic angle of
70 deg. is desired,
R1PE and R0PE must be set accordingly.
Fault resistance reach
GUID-CA51D9C7-7D9A-4DE5-92F1-FA1280BB899D v1
The fault resistance reaches in forward direction
RFFwPP, must cover RFPP
Zm
with at least
25% margin.
RFPP
Zm
is the setting of fault resistance for phase-to-phase fault for the longest
overreaching zone to be covered by FRPSPDIS, as shown in figure
recommended reach can be calculated according to equation
and
.
Index PHS in images and equations reference settings for Phase selection,
quadrilateral characteristic with settable angle function FRPSPDISand index Zm
reference settings for Distance protection function ZMRPDIS.
A) 60°
1.25
zm
RFFwPP
RFPP
³
×
EQUATION1318 V3 EN-US
(Equation 297)
B) 70°
1.82
1
0.32
1
0.91
Zm
Zm
Zm
RFFwPP
R PP
X PP
RFPP
>
×
+
×
+
×
EQUATION2226 V1 EN-US
(Equation 298)
where:
RFPP
Zm
is the setting of the longest reach of the overreaching zones that must be covered by FRPSPDIS.
Equation
are is also valid for three-phase fault. The proposed margin of 25% will
cater for the risk of cut off of the zone measuring characteristic that might occur at three-
phase fault when FRPSPDIScharacteristic angle is changed from 60 degrees to 90 degrees or
from 70 degrees to 100 degrees (rotated 30° anti-clock wise).
Section 7
1MRK 505 343-UEN B
Impedance protection
292
Application manual
Summary of Contents for Relion 670 series
Page 1: ...RELION 670 SERIES Line differential protection RED670 Version 2 1 IEC Application manual...
Page 2: ......
Page 40: ...34...
Page 64: ...58...
Page 150: ...144...
Page 406: ...400...
Page 472: ...466...
Page 494: ...488...
Page 512: ...506...
Page 524: ...518...
Page 604: ...598...
Page 686: ...680...
Page 718: ...712...
Page 722: ...716...
Page 758: ...752...
Page 759: ...753...