Siemens SIPROTEC 4, User Manual

Page: 453 / 734

Dropout Time Characteristics 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
p) ≤ 0.90
For zero sequence current, read 3
Ι
0p instead of
Ι
p
and T
3
Ι
0p
instead of T
p
;
for ground fault, read
Ι
Ep
instead of
Ι
p
and T
Ι Ep
instead of T
p
Dropout Setting
IEC without Disk Emulation approx. 1.05 · setting value
Ι
p
for
Ι
p
/
Ι
N
≥ 0.3, this corresponds to
approx. 0.95 · pickup value
Reset of the Integration Timer
IEC with Disk Emulation approx. 0.90 · setting value
Ι
p
Toleranzen
Anrege-, Rückfallschwellen
Ι
p
,
Ι
Ep
2 % vom Einstellwert, bzw. 10 mA für
Ι
N
= 1 A oder 50 mA für
Ι
N
5 A
Anregezeit für 2 ≤
Ι
/
Ι
p
≤ 20 5 % vom So 2 % Stromtoleranz, bzw. 30 ms
Rückfallzeit für
Ι
/
Ι p
≤ 0,90 5 % vom So 2 % Stromtoleranz, bzw. 30 ms
Influencing Variables for Pickup and Dropout
Power supply direct voltage in range 0.8 ≤ V
PS
/V
PSNom
≤ 1.15 1 %
Temperatur im Bereich –5 °C ≤ Θ
amb
≤ 131.00 °F (55 °C) 0,5 %/10 K
Frequency in range 25 Hz to 70 Hz 1 %
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1 %
1 %
Transient overreaction during fundamental harmonic measuring procedure for τ > 100 ms
(with full displacement) <5 %
Technical Data
4.3 Inverse-time Overcurrent Protection
SIPROTEC 4, 7SJ62/64, Manual 453
C53000-G1140-C207-8, Edition 08.2016