Siemens 7SC80 - Page 539

Dropout Value
IEC and ANSI (without Disk Emulation)
approx. 1.05 Ι
2p
, setting value, which is approx. 0.95 · pickup
threshold Ι
2
ANSI with Disk Emulation
approx. 0.90 Ι
2p
setting value
Tolerances
Dropout value 46-TOC Drop-Out
2p
Time for Ι
2
/Ι
2p
≤ 0.90
3 %of setting value, or 15 mA for Ι
Nom
= 1 A
or 75 mA for Ι
Nom
= 5 A
5 % of set point value + 2 % current tolerance, or 30 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 %
Transient overreaction for τ > 100 ms (with full displacement) <5 %
Technical Data
4.12 Negative Sequence Protection 46-TOC (Inverse Time Characteristic)
SIPROTEC Compact, 7SC80, Manual 539
E50417-G1140-C486-A8, Edition 07.2017