Siemens 7SK80 - Page 394

Technical Data
4.15 Ground Fault Detection (Sensitive/Insensitive)
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
394
Angle Correction
Angle correction for cable converter in two operating points F1/I1 and F2/I2:
Angle correction F1, F2
(for resonant-grounded system)
0.0° to 5.0° Increments 0.1°
Current values I1, I2 for angle correction
for sensitive 1 A transformer
for sensitive 5 A transformer
for normal 1 A transformer
for normal 5 A transformer
0.001 A to 1.600 A
0.005 A to 8.000 A
0.05 A to 35.00 A
0.25 A to 175.00 A
Increments 0.001 A
Increments 0.005 A
Increments 0.01 A
Increments 0.05 A
Measurement tolerance
sensitive
non-sensitive
3 % of setting value or 1 mA at I
N
= 1A or 5mA at I
Nom
= 5 A
for setting values < 10 mA approx. 20 %
3 % of setting value or 15 mA at I
Nom
= 1 A or 75 mA at
I
Nom
= 5 A
Angle tolerance 3°
Note: Due to the high sensitivity, the linear range of the measuring input I
Nom
with integrated sensitive input
transformer is from 0.001 · I
Nom
to 1.6 · I
Nom
. For currents greater than 1.6 · I
Nom
, correct direction determi-
nation can no longer be guaranteed.