Siemens SIPROTEC 7SJ62 Manual page 485

Trip Time Curves acc. to ANSI
Acc. to ANSI/IEEE (see also Figures 4-3 to 4-6)
The tripping times for I/I
For zero-sequence current read 3I0p instead of I
for ground fault read I
Pickup Threshold
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
≥ 20 are identical with those for I/I
p
p
instead of I and T instead of T
Ep p
IEp
4.3 Inverse-Time Overcurrent Protection 51(N)
= 20.
p
and T instead of T ;
3I0p p
p
approx. 1.10 · I
p
Technical Data
485