Logarithmic inverse trip time characteristic
[kennlinie-amz-log-invers-050803, 1, en_US]
Figure 4-11 Trip time characteristics of inverse time ground fault protection with logarithmic inverse time
characteristic
Logarithmic
inverse
t =51Ns Tmax – 51Ns TIME DIAL · 51Ns(Ι/51Ns PICKUP)
Note:
For Ι/51Ns PICKUP > 35 the time applies for Ι/51Ns PICKUP = 35; for t < 51Ns Tmin
the time 51Ns Tminapplies.
Technical Data
4.13 Ground Fault Detection (Sensitive/Insensitive)
322 SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016
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