Siemens SIPROTEC 4 - Page 490

Direction Determination for all Types of Ground Fault with cos φ / sin φ Measurement
Direction determination
- Ι
N
and V
N
gemessen
- 3Ι
0
and 3V
0
berechnet
Measuring principle Real/reactive power measurement
Measuring release RELEASE DIRECT.
(current component perpendicular to directional limit
line)
for sensitive transformer
for normal 1-A transformer
for normal 5-A transformer
0.001 A to 1.200 A
0.05 A to 30.00 A
0.25 A to 150.00 A
Increments
0.001 A
Increments
0.01 A
Increments
0.05 A
Dropout ratio approx. 0.80
Measuring method cos φ and sin φ
Directional limit line PHI CORRECTION -45.0° to +45.0° Increments 0.1°
Dropout delay RESET DELAY 0 s to 60 s Increments 1 s
Limitation of the directional areas using α1 and α2 1° to 15° Increments 1°
Angle tolerance 3°
Direction Determination for all Types of Ground Fault with V0 ϕ / I0 ϕ Measurement
Direction determination
- Ι
N
and V
N
measured
- 3Ι
0
and 3U
0
calculated
Measuring principle
V0 / Ι0–phase angle measurement
50Ns-1 element
Minimum voltage 50Ns-1 Vmin
V0 measured 7SJ64
V0 measured 7SJ62
3V0 calculated
0,4 V to 50 V
1.8 V to 50 V
10 V to 90 V
Increments
0,1 V
Increments
0,1 V
Increments 1 V
Phase angle 50Ns-1 Phi - 180° to 180° Increments 1°
Delta phase angle 50Ns-1 DeltaPhi 0° to 180° Increments 1°
50Ns-2 element
Minimum voltage50Ns-2 Vmin
V0 measured 7SJ64
V0 measured 7SJ62
3V0 calculated
0.4 V to 50 V
1.8 V to 50 V
10 V to 90 V
Increments
0.1 V
Increments
0.1 V
Increments 1 V
Phase angle 50Ns-2 Phi - 180° to 180° Increments 1°
Delta phase angle 50Ns-2 DeltaPhi 0° to 180° Increments 1°
Angle tolerance 3°
Angle Correction
Angle correction for cable converter in two operating points F1/I1 and F2/I2:
Angle correction F1, F2 (for grounded system) 0.0° to 5.0° Increments 0.1°
Technical Data
4.17 Ground Fault Detection (Sensitive/Insensitive)
490 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016