Siemens SIPROTEC 7SJ62 Manual page 514

Technical Data
4.16 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s)
Influencing Variables
Power Supply DC Voltage in Range
0.8 ≤ V
/V
PS PSNom
Temperature in Range 23.00 °F (–5 °C) ≤ Θ
Frequency in range f
Harmonics
- Up to 10 % 3rd harmonic
- Up to 10 % 5th harmonic
Note: When using the sensitive transformer, the linear range of the measuring input for the sensitive ground
fault detection is from 0.001 A to 1.6 A. The function is however still preserved for greater currents.
Direction Determination for all Types of Ground Fault with cos ϕ / sin ϕ Measurement
Direction determination
Measuring principle
Measuring release RELEASE DIRECT.
(current component perpendicular to directional limit line)
for sensitive transformer
for normal 1-A transformer
for normal 5-A transformer
Dropout ratio
Measuring method
Directional limit line PHI CORRECTION
Dropout delay RESET DELAY
Direction Determination for all Types of Ground Fault with V0 ϕ / I0 ϕ Measurement
Direction determination
Measuring principle
50Ns-1 element
Minimum voltage 50Ns-1 Vmin
V0 measured 7SJ64
V0 measured 7SJ62
3V0 calculated
Phase angle 50Ns-1 Phi
Delta phase angle 50Ns-1 DeltaPhi
50Ns-2 element
Minimum voltage 50Ns-2 Vmin
V0 measured 7SJ64
V0 measured 7SJ62
3V0 calculated
Phase angle 50Ns-2 Phi
Delta phase angle 50Ns-2 DeltaPhi
514
≤ 1.15
amb
± 5 Hz
Nom
≤ 131.00 °F (55 °C)
- I and V measured
N N
- 3I and 3V calculated
0 0
Real/reactive power measurement
0.001 A to 1.200 A
0.05 A to 30.00 A
0.25 A to 150.00 A
approx. 0.80
cos ϕ and sin ϕ
-45.0° to +45.0°
1 s to 60 s
- I and V measured
N N
- 3I and 3V calculated
0 0
V0 / I0 phase angle measurement
0.4 V to 50 V
1.8 V to 50 V
10 V to 90 V
- 180° to 180°
0° to 180°
0.4 V to 50 V
1.8 V to 50 V
10 V to 90 V
- 180° to 180°
0° to 180°
C53000-G1140-C207-2, Release date 01.2008
1 %
0.5 %/10 K
1 %
1 %
1 %
Increment 0.001 A
Increment 0.01 A
Increment 0.05 A
Increments 0.1°
Increments 1 s
Increment 0.1 V
Increment 0.1 V
Increment 1 V
Increments 1°
Increments 1°
Increment 0.1 V
Increment 0.1 V
Increment 1 V
Increments 1°
Increments 1°
SIPROTEC, 7SJ62/64, Manual