Siemens 7SC80 Manual page 538

Technical Data
4.12 Negative Sequence Protection 46-TOC (Inverse Time Characteristic)
Trip Time Curves acc. to ANSI
It can be selected one of the represented trip time characteristic curves in
on the right side of the figure.
The trip times for Ι
Pickup Threshold
Tolerances
Pickup thresholds 46-TOC PICKUP
Time for 2 ≤ Ι/46-TOC PICKUP ≤ 20
Dropout Time Curves with Disk Emulation acc. to ANSI
Representation of the possible dropout time curves, see
the figure
The dropout time constants apply to (Ι
538
/Ι ≥ 20 are identical to those forΙ
2 2p
/Ι ) ≤ 0.90
2 2p
Figure 4-12
/Ι = 20
2 2p
approx. 1.10· Ι
2p
3 %of setting value, or 15 mA for Ι
or 75 mA at Ι = 5 A
Nom
5 % of set point value + 2 % current tolerance, or 30 ms
Figure 4-12 and Figure 4-13
E50417-G1140-C486-A8, Edition 07.2017
and Figure 4-13 each
= 1 A
Nom
each on the left side of
SIPROTEC Compact, 7SC80, Manual