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