Siemens SIPROTEC 4 7SJ61 Manual page 298

Technical Data
4.3 Inverse-time Overcurrent Protection
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
Transient overreaction during fundamental harmonic measuring procedure for τ > 100 ms
(with full displacement)
[ausl-rueckfallkennl-amz-ansi-inv-short-170502-wlk, 1, en_US]
Figure 4-3
298
Dropout time and trip time curves of the inverse time overcurrent protection, acc. to ANSI/IEEE
1%
1%
<5 %
SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016