Trip Time Characteristics according to IEC
Acc. to IEC 60255-3 or BS 142, Sectiont 3.5.2 (see also
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
)
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
IEC with disk emulation
approx. 0.90 · setting value
Ι
EEp
Technical Data
4.17 Ground Fault Detection (Sensitive/Insensitive)
SIPROTEC 4, 7SJ62/64, Manual
487
C53000-G1140-C207-8, Edition 08.2016
Summary of Contents for SIPROTEC 4
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