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Siemens SIPROTEC 7SJ61 - Single-Phase Overcurrent Protection

Siemens SIPROTEC 7SJ61
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Technical Data
4.6 Single-phase Overcurrent Protection
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
333
4.6 Single-phase Overcurrent Protection
Current Elements
Operating Times
Dropout Ratios
Tolerances
Influencing Variables for Pickup Values
High-set current elements 50-2 0.05 A to 35.00 A
1)
0.003 A to 1.500 A
2)
or (element disabled)
Increments 0.01 A
Increments 0.001 A
T
50-2
0.00 s to 60.00 s
or (no trip)
Increments 0.01 s
Definite-Time Current Element 50-1 0.05 A to 35.00 A
1)
0.003 A to 1.500 A
2)
or (element disabled)
Increments 0.01 A
Increments 0.001 A
T
50-1
0.00 s to 60.00 s
or (no trip)
Increments 0.01 s
The set times are pure delay times.
1)
Secondary values for I
Nom
= 1 A; with I
Nom
= 5 A multiply currents by 5
2)
Secondary values for „sensitive“ measuring input, independent of nominal device current
Pickup/Dropout Times
Frequency Pickup Time 50 Hz 60 Hz
minimum 14 ms 13 ms
maximum 35 ms 35 ms
Dropout time approx. 25 ms 22 ms
Current Elements approx. 0.95 for I/I
Nom
0.5
Currents 3 % of setting value or 1 % of nominal current at I
Nom
= 1A or 5A
5 % of setting value or 3 % of nominal current at I
Nom
= 0.1 A
Times 1 % of setting value 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 0.95 f/f
Nom
1.05 1 %
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1%
1%

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