Siemens SIPROTEC 4 User Manual page 489

The dropout time curves apply to(Ι/Ι
Pickup Threshold ANSI
ANSI with disk emulation
ANSI with disk emulation
ANSI tolerances
Pickup/dropout thresholds Ι
Pickup time for 2 ≤ Ι/Ι
Dropout time for Ι/Ι
Influencing Variables
Auxiliary DC voltage within range 0.8 ≤ V
Temperature in range –5 °C (41 °F) ≤ Θ
(131 °F)
Frequency in range 25 Hz to 70 Hz
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
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.
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
) ≤ 0.90
EEp
approx. 1.05 · setting value Ι
approx. 0.95 · pickup value
setting value · setting valueΙ
2 % of setting value or 10 mA for Ι
EEp
≤ 20 5 % reference value + 2 % current tolerance, or 30 ms
EEp
≤ 0.90 5 % reference value + 2 %, or 30 ms
EEp
/V
H HN
≤ 55 °C
amb
4.17 Ground Fault Detection (Sensitive/Insensitive)
for Ι
EEp
EEp
N
≤ 1.15 1 %
0.5 %/10 K
1 %
1 %
1 %
Technical Data
/Ι ≥ 0.3; this corresponds to
EEp N
= 1 A or 50 mA for Ι = 5 A
N
489