ABB Relion 670 Series Technical Reference Manual page 313
Line differential protection ansi
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Applications manual (944 pages) ,
- Technical reference manual (752 pages)
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1MRK505222-UUS C
Technical reference manual
RFPG
R1+Rn
X1+Xn
RFPG
RFPG
R1+Rn
ANSI05000661 V3 EN
Figure 158:
Characteristic for phase-to-ground measuring , ohm/loop domain
X
(Ohm/loop)
RFPG
Xn
Rn
j
j
n
n
R
RFPG
X1+Xn
RFPG
ANSI05000661-3-en.vsd
Section 6
Impedance protection
X0-X1
=
3
R0-R1
=
3
(Ohm/loop)
307
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