Table of Contents
Advertisement
Dropout Value
IEC and ANSI (without Disk Emulation) Approx. 1.05 · I
ANSI with Disk Emulation
Tolerances
Dropout value 46-TOC Drop-Out
Time for 46/46-TOC ≤ 0.90
Influencing Variables for Pickup Values
Power supply direct voltage in the range of
0.8 ≤ V
/V
PS
PSNom
Temperature in the range of 23.00 °F (-5 °C) ≤ Θ
Frequency in the range from 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
Frequencies outside the range of 0.95 ≤ f/f
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
Transient overreaction for τ > 100 ms (with full displacement)
SIPROTEC, 7SC80, Manual
E50417-G1140-C486-A1, Release date 12.2011
4.8 Negative Sequence Protection 46-TOC (Inverse Time Characteristic)
threshold I
Approx. 0.90 · I
≤ 1.15
≤ 1.05 (f
Nom
Nom
setting value, which is approx. 0.95 · pickup
2p
2
setting value
2p
3 % of setting value or 15 mA for I
or 75 mA for I
= 5 A
Nom
5 % of set point value + 2 % current tolerance or 30 ms
≤ 131.00 °F (55 °C)
amb
= 50 Hz or 60 Hz)
Nom
≤ 1.05
Technical Data
= 1 A
Nom
1 %
0.5 %/10 K
1 %
Increased tolerances
1 %
1 %
<5 %
253
Advertisement
Table of Contents
