Siemens 7SC80 - Negative Phase Sequence Overvoltage Protection

Negative Phase Sequence Overvoltage Protection
Setting Ranges / Increments
Overvoltages 47NPS-1 V2, 47NPS-2 V2
Measured quantity used
with 3-phase connection
- negative-sequence voltages
Connection of phase-to-ground voltages:
- Evaluation of negative-sequence system 2 V to 240 V Increments 1 V
Connection of phase-to-phase voltages:
- Evaluation of negative-sequence system 2 V to 240 V Increments 1 V
Dropout ratio r for 47NPS-1, 47NPS-2
1)
0.90 to 0.99
Increments 0.01
Dropout threshold for (r· 47NPS-1) or (r· 47NPS-2) max. 240 V for phase-to-phase voltage
max. 240 V for phase-to-ground voltage
Minimum hysteresis 0.6 V
Time delay T 47NPS-1 V2, 47NPS-2 V2
phase-specific delay time Phx T 59-1
0.00 s to 100.00 s or
∞ (disabled)
Increments 0.01 s
1)
r = V
dropout
/V
pickup
Times
Pickup time overvoltage 47NPS-1 V2, 47NPS-2 V2
approx. 60 ms
Dropout time overvoltage 47NPS-1 V2, 47NPS-2 V2 approx. 60 ms
Tolerances
Voltage limit values
3 % of setting value or 1 V
Delay times T 1 % of setting value or 10 ms
Influencing Variables for Pickup and Dropout Values
Auxiliary direct voltage in the range of 0.8 ≤ V
PS
/V
PSNom
≤ 1.15 1 %
Temperature in the range of 23.00 °F (-5 °C) ≤ Θ
amb
≤ 131.00 °F (55 °C) 0.5 %/10 K
Frequency in the 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 %
Frequencies outside the range of 0.95 ≤ f/f
Nom
≤ 1.05 increased tolerances
Harmonics
- up to 10 % 3. harmonic
- up to 10 % 5. harmonic
1 %
1 %
4.9
Technical Data
4.9 Negative Phase Sequence Overvoltage Protection
534 SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017