Negative Sequence Protection (Definite-Time Characteristic) - Siemens SIPROTEC 4 Manual

4.9

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 (23 °F) ≤ Θ
Frequency in the range of 25 Hz to 70 Hz
Frequency in the 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)
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
for Ι = 1 A
N
for Ι = 5 A
N
all phase currents ≤ 10 A
for Ι = 1 A
Nom
for Ι = 5 A all phase currents ≤ 50 A
Nom
one phase current ≥ 0.1 A
for Ι = 1 A
Nom
for Ι = 5 A one phase current ≥ 0.5 A
Nom
approx. 35 ms
approx. 35 ms
approx. 0.95 for Ι
= 1 A 3 % of setting value or 10 mA
Ι
Nom
= 5 A 3 % of setting value or 50 mA
Ι
Nom
5 % of reference (calculated) value + 2 % current tolerance, or 30 ms
/V ≤ 1,15
Aux AuxNom
≤ 55 °C (131 °F)
amb
≤ 1.05 (f
Nom Nom
≤ 1.05
Nom
4.9 Negative Sequence Protection (definite-time characteristic)
0.05 A to 3.00 A or ∞ (disabled)
0.25 A to 15.00 A or ∞ (disabled)
0.00 s to 60.00 s or ∞ (disabled)
0.00 s to 60.00 s
/Ι ≥ 0,3
2 Nom
1 %
0.5 %/10 K
= 50 Hz or 60 Hz) 1 %
Increased tolerances
1 %
1 %
<5 %
Technical Data
Increments 0.01 A
Increments 0.01 s
Increments 0.01 s
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