Siemens SIPROTEC 4 7UT6 Series - Page 415

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