Technical Data
4.13 Load Jam Protection
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
508
4.13
Load Jam Protection
Setting Ranges / Increments
Timers
Dropout ratio
Tolerances
Influencing Variables
Tripping threshold
for
I
Nom
= 1 A 0.50 A to 12.00 A
Increments 0.01 A
for
I
Nom
= 5 A 2.50 A to 60.00 A
Alarm threshold
for
I
Nom
= 1 A 0.50 A to 12.00 A
Increments 0.01 A
for
I
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
Pickup time
approx. 55 ms
Dropout time
approx. 30 ms
Dropout ratio tripping stage
approx. 0.95
Dropout ratio warning stage
approx. 0.95
Pickup threshold
for
I
Nom
= 1 A 2 % of setting value or 10 mA
for
I
Nom
= 5 A 2 % of setting value or 50 mA
Time delay
1 % or 10 ms
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 f
Nom
±
5 Hz
1 %
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1 %
1 %
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