Siemens SIPROTEC 7SC80 Series Manual page 243

Dropout Ratio
Dropout ratio for
- fundamental component, RMS value
- instantaneous value
Tolerances
Current pickup
Delay times T
Influencing Variables for Pickup and Dropout Values
Auxiliary direct voltage in the range of 0.8 ≤
≤ 1.15
V /V
PS PSNom
Temperature in the range of 23.00 °F (-5 °C) ≤
Θ ≤ 131.00 °F (55 °C)
amb
Frequency in the range from 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
= 50 Hz or 60 Hz)
Frequencies outside the range of 0.95 ≤ f/f
1.05
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
for instantaneous values of 50-3/50N-3 elements
Transient overreaction for τ > 100 ms (with full dis-
placement)
SIPROTEC, 7SC80, Manual
E50417-G1140-C486-A1, Release date 12.2011
approx. 0.95 for I/I
approx. 0.90 for I/I
3 % of setting value or 15 mA at I
or 75 mA at I
Nom
1 % or 10 ms
1 %
0.5 %/10 K
≤ 1.05 (f
1 %
Nom Nom
≤
Increased tolerances
Nom
1 %
1 %
increased tolerances
<5 %
4.2 Definite-time overcurrent protection 50, 50N
≥ 0.3
Nom
≥ 0.3
Nom
= 1 A
Nom
= 5 A
Technical Data
243