Siemens 7SC80 Manual page 513

Dropout Setting
IEC without Disk Emulation
Reset of the Integration Timer
IEC with Disk Emulation
Tolerances
Pickup/dropout
thresholdsΙ , Ι
p Ep
Trip time for 2 ≤ Ι/Ι
Dropout time for Ι/Ιp ≤ 0,90
Influencing Variables for Pickup and Dropout Values
Auxiliary direct voltage in the range of 0.8 ≤ V
V ≤ 1.15
PSNom
Temperature in the range of 23.00 °F (-5 °C) ≤
Θ ≤ 131.00 °F (55 °C)
amb
Frequency in the range of 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
(f = 50 Hz or 60 Hz)
Nom
Frequencies outside the range of 0.95 ≤ f/f
1.05
Harmonics
- up to 10 % 3. harmonic
- up to 10 % 5. harmonic
Transient overreaction for τ > 100 ms (with full
displacement)
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
approx. 1.05 · setting value Ι
approx. 0.95 · pickup value
approx. 0.90 · setting value Ι
= 1 A 3 % of setting value or 15 mA
for Ι
Nom
for Ι = 5 A 3 % of setting value or 75 mA
Nom
5 % of reference (calculated) value + 2 % current tolerance, or
≤ 20
p
30 ms
5 % of reference (calculated) value + 2 % current tolerance, or
30 ms
≤ 1.05
Nom
Nom
for Ι
p p
p
/ 1 %
PS
0.5 %/10 K
1 %
≤ increased tolerances
1 %
1 %
<5 %
Technical Data
4.3 Inverse-Time Overcurrent Protection
/Ι ≥ 0.3, this corresponds to
N
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