Negative Sequence Protection (definite-time characteristic)
Setting Ranges / Increments
Unbalanced load tripping element
46-1.46-2
for Ι
N
= 1 A
0.05 A to 3.00 A or ∞ (disabled) Increments 0.01 A
for Ι
N
= 5 A
0.25 A to 15.00 A or ∞ (disabled)
Delay Times 46-1, 46-2 0.00 s to 60.00 s or ∞ (disabled) Increments 0.01 s
Dropout Delay Times 46 T DROP-OUT 0.00 s to 60.00 s Increments 0.01 s
Functional Limit
Functional Limit
for Ι
Nom
= 1 A
all phase currents ≤ 10 A
for Ι
Nom
= 5 A
all phase currents ≤ 50 A
for Ι
Nom
= 1 A
one phase current ≥ 0.1 A
for Ι
Nom
= 5 A
one phase current ≥ 0.5 A
Times
Pickup Times
Dropout Times
approx. 35 ms
approx. 35 ms
Dropout Ratio
Characteristic 46-1, 46-2
approx. 0.95 for Ι
2
/Ι
Nom
≥ 0,3
Tolerances
Pickup values 46-1,
46-2
Ι
Nom
= 1 A
3 % of setting value or 10 mA
Ι
Nom
= 5 A
3 % of setting value or 50 mA
Time Delays 5 % of reference (calculated) value + 2 % current tolerance, or 30 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 %
Transient overreaction for τ > 100 ms (with full displacement) <5 %
4.9
Technical Data
4.9 Negative Sequence Protection (definite-time characteristic)
SIPROTEC 4, 7SJ80, Manual 383
E50417-G1140-C343-A8, Edition 12.2017
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