ABB Relion 670 series - Page 204

R1PG+RNFw
RFFwPG
X1FwPG+XNFw
X1RvPG+XNRv
RFFwPGRFRvPG
RFFwPG
RFRvPG
RFRvPG
R
X
(Ohm/loop)
(Ohm/loop)
ANSI09000625-1-en.vsd
j
N
0 1
3
X PE X RVPE
XNRV
-
=
0 1
3
X PE X FWPE
XNFW
-
=
0 1
3
X PG X FWPG
XNFW
-
=
0 1
3
X PG X RVPG
XNRV
-
=
j
N
j
N
0 1
3
X PG X FwPG
XNFw
-
=
1
1
X RvPG
XNRv XNFw
X FwPG
= ×
0 1
3
R PG R PG
RNFw
-
=
ANSI09000625 V1 EN
Figure 89: Characteristic for the phase-to-ground measuring loops, ohm/loop
domain
Section 6 1MRK505222-UUS C
Impedance protection
198
Technical reference manual