Siemens siprotec SJ62 User Manual page 469

4 Technical Data
Dropout Time Characteristics with Disk Emulation acc. to ANSI/IEEE
Dropout Setting
Tolerances
467
Acc. to ANSI/IEEE (see also Figures 4-3 to 4-6)
The dropout time curves apply for the range (I/Ip) ≤ 0.90
For zero-sequence current read 3I0p instead of I
for ground fault read I instead of I
Ep
IEC without Disk Emulation
ANSI with Disk Emulation
Pickup/dropout thresholds I
Pickup tme for 2 ≤ I/I ≤ 20
p
Dropout time for I/Ip ≤ 0.90
and T
p
and T instead of T
p IEp
approx. 1.05 · set value I
corresponds to approx. 0.95 · pickup
threshold
approx. 0.90 · set value I
, I 2 % of set value or 10 mA for I
p Ep
or 50 mA for I
5 % of reference (calculated) value + 2 %
current tolerance, respectively 30 ms
5 % of reference (calculated) value + 2 %,
respectively 30 ms
instead of T ;
3I0p p
p
for I
p
p
= 5 A
Nom
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
≥ 0.3;
/I
p Nom
= 1 A
Nom