Negative Sequence Protection (Definite-Time Characteristic) - Siemens 7SK80 Manual

Technical Data

4.8 Negative Sequence Protection (definite-time characteristic)

4.8 Negative Sequence Protection (definite-time characteristic)
Setting Ranges / Increments
Unbalanced load tripping element
46-1,46-2
Delay Times 46-1, 46-2
Dropout Delay Times 46 T DROP-OUT
Functional Limit
Functional Limit
Times
Pickup Times
Dropout Times
Dropout Ratio
Characteristic 46-1, 46-2
Tolerances
Pickup values 46-1, 46-2
Time Delays
Influencing Variables for Pickup Values
Auxiliary DC voltage in range 0.8 ≤ V
Temperature in range –5 °C (41 °F) ≤ Θ
Frequency in range of 25 Hz – 70 Hz
Frequency in range of 0.95 ≤ f/f
Frequency outside range 0.95 ≤ f/f
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
Transient overreaction for τ > 100 ms (with full displacement)
378
= 1 A 0.05 A to 3.00 A or ∞ (disabled)
for I
Nom
= 5 A 0.25 A to 15.00 A or ∞ (disabled)
for I
Nom
0.00 s to 60.00 s or ∞ (disabled)
0.00 s to 60.00 s
= 1 A all phase currents ≤ 10 A
for I
Nom
= 5 A all phase currents ≤ 50 A
for I
Nom
= 1 A one phase current ≥ 0.05 A
for I
Nom
= 5 A one phase current ≥ 0.25 A
for I
Nom
Approx. 35 ms
Approx. 35 ms
Approx. 0.95 for I /I
2 Nom
3 % of setting value or 15 mA for I
1 % or 10 ms
≤ 1.15
/V
Aux AuxNom
≤ 55 °C (131 °F)
amb
≤ 1.05 (f
= 50 Hz or 60 Hz)
Nom Nom
≤ 1.05
Nom
≥ 0.3
= 1 A, or 75 mA for I
Nom
E50417-G1140-C344-A5, Release date 11.2012
Increments 0.01 A
Increments 0.01 s
Increments 0.01 s
= 5 A
Nom
1 %
0.5 %/10 K
1 %
Increased tolerances
1 %
1 %
<5 %
SIPROTEC, 7SK80, Manual