ABB Relion 670 series - Page 466

With all phase voltages and phase currents available and fed to the protection IED, it is
recommended to set the MeasureMode to positive sequence.
The impedance settings are set in pu with ZBase as reference:
2 2
400
160
1000
= = =
UBase
ZBase ohm
SBase
EQUATION1960 V1 EN (Equation 426)
2
400
( ) ( 2) 2 20 2 52
5000
ZA Z line Zsc station j j j ohm= + = + + = +
EQUATION1961 V1 EN (Equation 427)
This corresponds to:
2 52
0.0125 0.325 0.325 88
160
j
ZA j pu pu
+
= = + = Ð °
EQUATION1962 V1 EN (Equation 428)
Set ZA to 0.32.
2
400
( 1) 32
5000
ZB Zsc station j j ohm= = =
EQUATION1963 V1 EN (Equation 429)
This corresponds to:
32
0.20 0.20 90
160
j
ZB j pu pu= = = Ð °
EQUATION1964 V1 EN (Equation 430)
Set ZB to 0.2
This corresponds to:
2 20
0.0125 0.125 0.126 84
160
j
ZC j pu pu
+
= = + = Ð °
EQUATION1966 V1 EN (Equation 431)
Set ZC to 0.13 and AnglePhi to 88°
Section 8 1MRK 506 369-UUS -
Impedance protection
460 Line distance protection REL670 2.2 ANSI
Application manual