Siemens SIPROTEC 4 7SJ61 Manual page 320

Technical Data
4.13 Ground Fault Detection (Sensitive/Insensitive)
IEC with disk emulation
IEC Tolerances
Pickup/dropout thresholds Ι
Pickup time for 2 ≤ Ι/Ι
Dropout time forΙ/Ι
Trip Time Curves acc. to ANSI
Acc. to ANSI/IEEE (see also
The tripping times for Ι/Ι
Pickup threshold
Dropout Time Curves with Disk Emulation acc. to. ANSI/IEEE
Acc. to ANSI/IEEE (see also
320
approx. 0.90 · setting value Ι
2 % of setting value or 10 mA für Ι
EEp
≤ 20 5 % of reference value + 2 % current tolerance, or 30 ms
EEp
5 % of reference value + 2 %, or 30 ms
≤ 0.90
EEp
Figure 4-3 to Figure
≥ 20 are identical with those for Ι/Ι
EEp
Figure 4-3 bis Figure
EEp
= 1 A or 50 mA for Ι
N
4-6)
= 20
EEp
approx. 1.10 · Ι
EEp
4-6)
C53000-G1140-C210-6, Edition 05.2016
= 5 A
N
SIPROTEC 4, 7SJ61, Manual