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