Load Jam Protection - Siemens 7SK80 Manual

4.12

Load Jam Protection

Setting Ranges / Increments
Tripping threshold
Alarm threshold
Trip delay
Message delay
Blocking duration after motor start
Timers
Pickup time
Dropout time
Dropout ratio
Dropout ratio tripping stage
Dropout ratio warning stage
Tolerances
Pickup threshold
Time delay
Influencing variables
Power supply direct voltage in range 0.8 ≤ V
Temperature in range –5 °C ≤ Θ
Frequency in the range from 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
Frequency outside range of 0.95 ≤ f/f
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
for I = 1 A 0.50 A to 12.00 A
Nom
for I = 5 A 2.50 A to 60.00 A
Nom
for I = 1 A 0.50 A to 12.00 A
Nom
for I = 5 A 2.50 A to 60.00 A
Nom
0.00 s to 600.00 s
0.00 s to 600.00 s
0.00 s to 600.00 s
approx. 55 ms
approx. 30 ms
approx. 0.95
approx. 0.95
for I = 1 A 3 % of setting value or 15 mA
Nom
for I = 5 A 3 % of setting value or 75 mA
Nom
1 % or 10 ms
≤ 1.15
/V
PS PSNom
≤ 55 °C
amb
≤ 1.05 (f
= 50 Hz or 60 Hz)
Nom Nom
≤ 1.05
Nom
Technical Data
4.12 Load Jam Protection
Increments 0.01 A
Increments 0.01 A
Increments 0.01 s
Increments 0.01 s
Increments 0.01 s
1 %
0.5 %/10 K
1 %
Increased tolerances
1 %
1 %
387