Siemens 7SK80 - Page 400

Technical Data
4.19 Flexible Protection Functions
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
400
Tolerances
Influencing Variables for Pickup Values
Pickup thresholds:
Current for I
Nom
= 1 A 3% of setting value or 15 mA
for I
Nom
= 5 A 3% of setting value or 75 mA
Current (symmetrical components) for I
Nom
= 1 A 4% of setting value or 20 mA
for I
Nom
= 5 A 4% of setting value or 100 mA
Current (I
2
/I
1
) 4% of setting value
Voltage 3% of setting value or 0.2 V
Voltage (symmetrical components) 4% of setting value or 0.2 V
Voltage change dV/dt 5 % of setting value or 2 V/s
Power for I
Nom
= 1 A 3% of setting value or 0.5 W
for I
Nom
= 5 A 3% of setting value or 2.5 W
Power factor 3°
Frequency 15 mHz
Frequency change 5% of setting value or 0.05 Hz/s
Times 1% of setting value or 10 ms
Auxiliary DC voltage in range 0.8 ≤ V
Aux
/V
AuxNom
≤ 1.15 1 %
Temperature in range
–5 °C (41 °F) ≤ Θ
amb
≤ 55 °C (131 °F)
0.5 %/10 K
Frequency in range of 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
Nom
≤ 1.05 (f
Nom
= 50 Hz
or 60 Hz)
1%
Frequency outside range 0.95 ≤ f/f
Nom
≤ 1.05 Increased tolerances
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1%
1%