ABB REL670 2.2 IEC - Setting of Reach in Resistive Direction

( )
( )
( ) ( )
2 2
0 Re
Re 0 1
Re Im
X m B
K
B B
×
= -
+
EQUATION1427 V2 EN-US (Equation 209)
( )
( )
( ) ( )
2 2
0 Im
Im 0
Re Im
X m B
K
B B
×
=
+
EQUATION1428 V2 EN-US (Equation 210)
Parallel line is out of service and earthed in both ends
SEMOD154704-69 v3
Apply the same measures as in the case with a single set of setting parameters. This
means that an underreaching zone must not overreach the end of a protected circuit
for the single phase-to-earth faults. Set the values of the corresponding zone (zero-
sequence resistance and reactance) equal to:
R
0E
R
0
1
X
m0
2
R
0
2
X
0
2
+
--------------------------
+
è ø
ç ÷
æ ö
×=
EQUATION561 V1 EN-US (Equation 211)
X
0E
X
0
1
X
m0
2
R
0
2
X
0
2
+
--------------------------
–
è ø
ç ÷
æ ö
×=
EQUATION562 V1 EN-US (Equation 212)
8.5.3.6 Setting of reach in resistive direction
SEMOD154704-76 v1
Set the resistive reach independently for each zone, for phase-to-earth loop (RIPE)
measurement.
Set separately the expected fault resistance for the phase-to-earth faults (RFPE) for
each zone. Set all remaining reach setting parameters independently of each other
for each distance zone.
The final reach in resistive direction for phase-to-earth fault loop measurement
automatically follows the values of the line-positive and zero-sequence resistance,
and at the end of the protected zone is equal to equation
213.
R
1
3
---
2 R1PE× R0PE+
( )
RFPE+=
EQUATION567 V1 EN-US
(Equation 213)
2 X1PE +X0
arctan
2 R1PE +R0
loop j
é ù
×
ê ú
=
×
ê ú
ë û
EQUATION1457 V1 EN-US (Equation 214)
1MRK 506 369-UEN B Section 8
Impedance protection
Line distance protection REL670 2.2 IEC 279
Application manual