Siemens SIPROTEC 7SJ61 - Single-Phase Overcurrent Protection

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%