Siemens SIPROTEC 4 7SJ61 Manual page 293

Dropout Time Characteristics 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/Ιp) ≤ 0.90
For zero sequence current, read 3Ι0p instead of Ι
for ground fault, read Ι
Dropout Setting
IEC without Disk Emulation
Reset of the Integration Timer
IEC with Disk Emulation
Toleranzen
Anrege-, Rückfallschwellen Ι
Anregezeit für 2 ≤ Ι/Ι
Rückfallzeit für Ι/
Influencing Variables for Pickup and Dropout
Power supply direct voltage in range 0.8 ≤ V
Temperatur im Bereich –5 °C ≤ Θ
Frequency in range 25 Hz to 70 Hz
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
Transient overreaction during fundamental harmonic measuring procedure for τ > 100 ms
(with full displacement)
SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016
instead of Ι and T
Ep p
ΙEp
approx. 1.05 · setting value Ι
approx. 0.95 · pickup value
approx. 0.90 · setting value Ι
, Ι 2 % vom Einstellwert, bzw. 10 mA für Ι
p Ep
5 % vom Sollwert + 2 % Stromtoleranz, bzw. 30 ms
≤ 20
p
≤ 0,90 5 % vom Sollwert + 2 % Stromtoleranz, bzw. 30 ms
Ιp
≤ 131.00 °F (55 °C)
amb
Figure 4-1 and Figure
and T instead of T
p 3Ι0p
instead of T
p
for Ι
p
p
/V ≤ 1.15
PS PSNom
Technical Data
4.3 Inverse-time Overcurrent Protection
4-2)
;
p
/Ι ≥ 0.3, this corresponds to
p N
= 1 A oder 50 mA für Ι
N
1 %
0,5 %/10 K
1 %
1 %
1 %
<5 %
5 A
N
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