Siemens SIPROTEC 4 Manual page 367

Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
at instantaneous value of 50-3/50N-3 elements
Transient overreaction for τ > 100 ms (with full displacement)
[ausloese-rueckfall-kennli-amz-iec-norm-stark-170502-wlk, 1, en_US]
Figure 4-1
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
Dropout time and trip time curves of the inverse time overcurrent protection, acc. to IEC
Technical Data
4.3 Inverse-time Overcurrent Protection
1 %
1 %
Increased tolerances
<5 %
367