Siemens SIPROTEC 4 User Manual page 471

Trip Time Curves acc. to ANSI
It can be selected one of the represented trip time characteristic curves in
the right side of the figure.
The trip times for Ι
Pickup Threshold
Tolerances
Pickup Threshold Ι
Time for 2 ≤ Ι/Ι
Dropout Time Curves with Disk Emulation acc. to ANSI
Representation of the possible dropout time curves, see
figure
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
/Ι ≥ 20 are identical to those forΙ
2 2p
2p
≤ 20
2p
4.10 Negative Sequence Protection (inverse-time characteristics)
Figure 4-8
/Ι = 20
2 2p
approx. 1.10· Ι
2p
3 % of setting value or 10 mA for Ι
or 50 mA with Ι = 5 A
Nom
5 % of reference (calculated) value + 2 % current tolerance,
or 30 ms
Figure 4-8 and Figure 4-9
Technical Data
and Figure 4-9 each on
= 1 A
Nom
each on the left side of the
471