Inrush Restraint - Siemens 7SC80 Manual

4.5

Inrush Restraint

Influenceable Functions
Overcurrent elements
Setting Ranges/Increments
2nd harmonic in % of the fundamental compo-
nent
Crossblocking time
Current pickup
Times
For pickup and dropout times, see the Technical Data:
Definite Time Overcurrent Protection
Inverse Time Overcurrent Protection
Directional Overcurrent Protection
Dropout Ratio
Dropout ratio 2nd harmonic in % of the funda-
mental component
Tolerances
Current pickups 2nd harmonic in % of the
fundamental component
Delay times T
Influencing Variables for Pickup and Dropout Values
Auxiliary direct voltage in the range of 0.8 ≤ V
Temperature in the range of 23.00 °F (-5 °C) ≤ Θ
Frequency in the range of 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
Frequencies outside the range of 0.95 ≤ f/f
Harmonics
- up to 10 % 3. harmonic
- up to 10 % 5. harmonic
for instantaneous values of 50-3/50N-3 elements
Transient overreaction for τ > 100 ms (with full displacement)
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
50-1, 50-2, 50-3, 50N-1, 50N-2, 50N-3 51,
51-1, 51-2, 51-3, 51-4 51N, 51N-1, 51N-2, 51N-3,
51N-4
67-1, 67-2, 67-3, 67N-1, 67N-2, 67N-3
67-TOC-1, 67-TOC-2, 67-TOC-3, 67-TOC-4 67N-TOC-1,
67N-TOC-2, 67N-TOC-3, 67N-TOC-4
10 % to 50 %
0.00 s to 180.00 s
= 1 A 0.30 A to 25.00 A
for Ι
Nom
for Ι = 5 A 1.50 A to 125.00 A
Nom
approx. 0.95
3 % of setting value
1 % or 10 ms
/V ≤ 1.15
PS PSNom
≤ 131.00 °F (55 °C)
amb
≤ 1.05 (f = 50 Hz or 60 Hz)
Nom Nom
≤ 1.05
Nom
Technical Data
4.5 Inrush Restraint
Increments 1 %
Increments
0.01 s
Increments
0.01 A
Increments
0.01 A
1 %
0.5 %/10 K
1 %
increased tolerances
1 %
1 %
increased tolerances
<5 %
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