Single-Phase Overcurrent Protection - Siemens SIPROTEC 7SJ62 Manual

Technical Data

4.7 Single-phase Overcurrent Protection

4.7 Single-phase Overcurrent Protection
Current Elements
High-set current elements
Definite-Time Current Element
The set times are pure delay times.
1)
Secondary values for I
2)
Secondary values for „sensitive" measuring input, independent of nominal device current
Operating Times
Pickup/Dropout Times
Frequency Pickup Time
minimum
maximum
Dropout time approx.
Dropout Ratios
Current Elements
Tolerances
Currents
Times
Influencing Variables for Pickup Values
Power supply direct voltage in range 0.8 ≤ V
Temperature in range 23.00 °F (-5 °C) ≤ Θ
Frequency in range 0.95 ≤ f/f
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
496
50-2
T
50-2
50-1
T
50-1
= 1 A; with I = 5 A multiply currents by 5
Nom Nom
50 Hz
14 ms
≤ 35 ms
25 ms
approx. 0.95 for I/I
3 % of setting value or 1 % of nominal current at I
5 % of setting value or 3 % of nominal current at I
1 % of setting value or 10 ms
/V
PS PSNom
≤ 131.00 °F (55 °C)
amb
≤ 1.05
Nom
1)
0.05 A to 35.00 A
2)
0.003 A to 1.500 A
or ∞ (element disabled)
0.00 s to 60.00 s
or ∞ (no trip)
1)
0.05 A to 35.00 A
2)
0.003 A to 1.500 A
or ∞ (element disabled)
0.00 s to 60.00 s
or ∞ (no trip)
60 Hz
13 ms
≤ 35 ms
22 ms
≥ 0.5
Nom
≤ 1.15
1 %
0.5 %/10 K
1 %
1 %
1 %
C53000-G1140-C207-2, Release date 01.2008
Increments 0.01 A
Increments 0.001 A
Increments 0.01 s
Increments 0.01 A
Increments 0.001 A
Increments 0.01 s
= 1 A or 5 A
Nom
= 0.1 A
Nom
SIPROTEC, 7SJ62/64, Manual