Siemens SIPROTEC 4 7SJ61 - Page 319

Tolerances
Times
inv 5 % ± 15 ms
def. 1 % of setting value or 10 ms
Trip Time Characteristics according to IEC
Acc. to IEC 60255-3 or BS 142, Sectiont 3.5.2 (see also Figure 4-1 and Figure 4-2)
The tripping times for Ι/Ι
51Ns
≥ 20 are identical with those for Ι/Ι
EEp
= 20
Pickup threshold
approx. 1.10 · Ι
EEp
Dropout Time Curves with Disk Emulation acc. to. IEC
Acc. to IEC 60255-3 or BS 142, Section 3.5.2 (see also
Figure 4-1 and Figure 4-2)
The dropout time curves apply to (Ι/Ι
EEp
) ≤ 0.90
Pickup Threshold IEC
IEC without disk emulation
approx. 1.05 · setting value Ι
EEp
for Ι
EEp
/Ι
N
≥ 0,3; this corresponds to
approx. 0,95 · pickup value
Technical Data
4.13 Ground Fault Detection (Sensitive/Insensitive)
SIPROTEC 4, 7SJ61, Manual 319
C53000-G1140-C210-6, Edition 05.2016