Siemens 7SC80 - Single-Phase Overcurrent Protection

Single-Phase Overcurrent Protection
Current Elements
High-set current elements
50-2
for Ι
Nom
= 1 A
0.001 A to 1.6 A or ∞ (element disabled) Increments 0.001 A
for Ι
Nom
= 5 A
0.005 A to 8 A or ∞ (element disabled)
T
50-2
0.00 s to 60.00 s or ∞ (no trip) Increments 0.01 s
Definite time current
element 50-1
for Ι
Nom
= 1 A
0.001 A to 1.6 A or ∞ (element disabled) Increments 0.001 A
for Ι
Nom
= 5 A
0.005 A to 8 A or ∞ (element disabled)
T
50-1
0.00 s to 60.00 s or ∞ (no trip) Increments 0.01 s
Operating Times
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
Dropout Ratios
Current Elements
approx 0.95 for Ι/Ι
Nom
≥ 0.5
Tolerances
Currents
5 % of setting value or 1 mA
Times 1 % of setting value or 10 ms
Influencing Variables for Pickup Values
Auxiliary DC voltage in range 0.8 ≤ V
Aux
/V
AuxNom
≤ 1.15 1 %
Temperature in range –5 °C (23 °F) ≤ Θ
amb
≤ 55 °C (131 °F) 0.5 %/10 K
Frequency in the range of 25 Hz to 70 Hz
Frequency in the range of 0.95 ≤ f/f
Nom
≤ 1.05 (f
Nom
= 50 Hz or 60 Hz) 1 %
Frequency outside range 0.95 ≤ f/f
Nom
≤ 1.05 Increased tolerances
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1 %
1 %
4.7
Technical Data
4.7 Single-Phase Overcurrent Protection
SIPROTEC Compact, 7SC80, Manual 531
E50417-G1140-C486-A8, Edition 07.2017