Siemens SIPROTEC 4 7UT6 Series Manual page 415

[erddiff-ausloesekennlinie-020926-rei, 1, en_GB]
Figure 4-6
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
Tripping characteristic of the restricted earth fault protection depending on the earth current
ratio 3Ι "/3Ι ' ((both currents in phase + or counter-phase –); Ι
0 0
current
Technical Data
4.3 Restricted Earth Fault Protection
> = setting; Ι = tripping
REF aus
415