The dropout time curves apply to(Ι/Ι
EEp
) ≤ 0.90
Pickup Threshold ANSI
ANSI with disk emulation
approx. 1.05 · setting value Ι
EEp
for Ι
EEp
/Ι
N
≥ 0.3; this corresponds to
approx. 0.95 · pickup value
ANSI with disk emulation
setting value · setting valueΙ
EEp
ANSI tolerances
Pickup/dropout thresholds
Ι
EEp
2 % of setting value or 10 mA for Ι
N
= 1 A or 50 mA for Ι
N
= 5 A
Pickup time for 2 ≤ Ι/Ι
EEp
≤ 20
5 % reference value + 2 % current tolerance, or 30 ms
Dropout time for Ι/Ι
EEp
≤ 0.90
5 % reference value + 2 %, or 30 ms
Influencing Variables
Auxiliary DC voltage within range 0.8 ≤ V
H
/V
HN
≤ 1.15 1 %
Temperature in range –5 °C (41 °F) ≤ Θ
amb
≤ 55 °C
(131 °F)
0.5 %/10 K
Frequency in range 25 Hz to 70 Hz 1 %
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1 %
1 %
Note: When using the sensitive transformer, the linear range of the measuring input for the sensitive ground
fault detection is from 0.001 A to 1.6 A. The function is, however, still preserved for greater currents.
Technical Data
4.13 Ground Fault Detection (Sensitive/Insensitive)
SIPROTEC 4, 7SJ61, Manual 321
C53000-G1140-C210-6, Edition 05.2016
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