Siemens SIPROTEC 4 7SJ61 - Load Jam Protection

Load Jam Protection
Setting Ranges / Increments
Tripping threshold
for Ι
Nom
= 1 A
0.50 A to 12.00 A Increments 0.01 A
for Ι
Nom
= 5 A
2.50 A to 60.00 A
Alarm threshold
for Ι
Nom
= 1 A
0.50 A to 12.00 A Increments 0.01 A
for Ι
Nom
= 5 A
2.50 A to 60.00 A
Trip delay 0.00 s to 600.00 s Increments 0.01 s
Message delay 0.00 s to 600.00 s Increments 0.01 s
Blocking duration after motor start 0.00 s to 600.00 s Increments 0.01 s
Timers
Pickup time approx. 55 ms
Dropout time approx. 30 ms
Dropout ratio
Dropout ratio tripping stage approx. 0,95
Dropout ratio warning stage approx. 0,95
Tolerances
Pickup threshold
for Ι
Nom
= 1 A
2 % of setting value or 10 mA
for Ι
Nom
= 5 A
2 % of setting value or 50 mA
Time delay 1 % or 10 ms
Influencing Variables
Power supply direct voltage in range 0.8 ≤ V
PS
/V
PSNom
≤ 1.15 1 %
Temperature in range 23.00 °F (-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 %
4.11
Technical Data
4.11 Load Jam Protection
314 SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016