Siemens SIPROTEC 4 7SJ61 - Negative Sequence Protection (definite-time characteristic)

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
Power supply direct voltage in range 0.8 ≤ V
PC
/V
PSNom
≤ 1.15 1 %
Temperature in range 23.00 °F (-5 °C) ≤ Θ
amb
≤ 131.00 °F (55 °C) 0.5 %/10 K
Frequency in range 25 Hz to 70 Hz 1 %
Harmonics
- up to 10 % 3rd harmonic
- up to 10 % 5th harmonic
1 %
1 %
Transient overreaction for τ > 100 ms (with full displacement) <5 %
4.7
Technical Data
4.7 Negative Sequence Protection (definite-time characteristic)
SIPROTEC 4, 7SJ61, Manual 305
C53000-G1140-C210-6, Edition 05.2016