(Ohm/loop)
ANSI11000415-1-en.vsd
ϕ
N
ϕ
N
X (Ohm/loop)
ANSI11000415 V1 EN-US
Figure 151: ZMFPDIS Characteristic for phase-to-ground measuring, ohm/loop domain
The faulty loop in relation to the fault type can be presented as in figure
. The main intention
with this illustration is to make clear how the fault resistive reach should be interpreted and set.
Note in particular that the setting RFPP always represents the total fault resistance of the loop,
regardless the fact that the fault resistance (arc) may be divided into parts like for three-phase or
phase-to-phase faults. The R1 + jX1 represent the positive sequence impedance from the
measuring point to the fault location.
1MRK 502 066-UUS B
Section 7
Impedance protection
307
Technical manual
Summary of Contents for Relion 670 series
Page 1: ... RELION 670 SERIES Generator protection REG670 Version 2 1 ANSI Technical manual ...
Page 2: ......
Page 48: ...42 ...
Page 62: ...56 ...
Page 182: ...176 ...
Page 692: ...686 ...
Page 726: ...720 ...
Page 1014: ...1008 ...
Page 1242: ...1236 ...
Page 1362: ...1356 ...
Page 1386: ...1380 ...
Page 1422: ...1416 ...
Page 1431: ...1425 ...