Siemens SIPROTEC 4 7SJ61 Manual page 297

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
ANSI without Disk Emulation
Reset of the Integration Timer
ANSI with Disk Emulation
Tolerances
Pickup/dropout thresholds Ι
Trip time for 2 ≤ Ι/Ι
Dropout time forΙ/Ι
Influencing Variables for Pickup and Dropout
Power supply direct voltage in range 0.8 ≤ V
Temperature in range 23.00 °F (-5 °C) ≤ Θ
Frequency in range 25 Hz to 70 Hz
SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016
instead of Ι and T instead of T
Ep p ΙEp
approx. 1.05 · setting value Ι
0.95 · pickup value
approx. 0.90 · setting value Ι
, Ι 2% of setting value or 10 mA for Ι
p Ep
≤ 20 5 % of reference (calculated) value + 2 % current tolerance, or 30 ms
p
≤ 0.90 5 % of reference value + 2 %, or 30 ms
p
/V
PS
≤ 131.00 °F (55 °C)
amb
and T instead of T ;
p 3Ι0p p
p
for Ι /Ι
p p
p
Nom
≤ 1,15
PSNom
Technical Data
4.3 Inverse-time Overcurrent Protection
≥ 0.3; corresponds to approx.
N
= 1 A or 50 mA for Ι = 5 A
Nom
1 %
0.5 %/10 K
1 %
297