Siemens siprotec SJ62 User Manual page 497

4 Technical Data
Influencing Variables
Direction Determination for All Types of Ground Faults
Angle Correction
495
Power Supply DC Voltage in Range
0.8 ≤ V ≤ 1.15
/V
PS PSNom
Temperature in Range
23.00 °F (–5 °C) ≤ Θ ≤ 131.00 °F (55 °C)
amb
Frequency in Range 0.95 ≤ f/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 sen-
sitive ground fault detection is from 0.001 A to 1.6 A. The function is however still preserved for
greater currents.
Direction Measurement
Measuring Principle
Measuring release I
RELEASE DIR.
(current component perpendicular (90°) to
direction phasor)
for sensitive transformer
for normal 1-A transformer
for normal 5-A transformer
Dropout ratio
Measurement method
Direction Phasor ϕ
Correction
Dropout Delay T
Reset Delay
Angle correction for cable converter in two operating points F1/I1 and F2/I2:
Angle correction F1, F2
(for resonant-grounded system)
Current value I1, I2 for the angle correction
for sensitive transformer
for normal 1-A transformer
for normal 5-A transformer
Measurement Tolerance
Angle Tolerance
Note: Due to the high sensitivity the linear range of the measuring input I
sitive input transformer is from 0.001A to 1.6 A. For currents greater than 1.6 A, correct direc-
tionality can no longer be guaranteed.
1 %
0.5 %/10 K
≤ 1.05
1 %
Nom
1 %
1 %
– I and V
N
– 3 · I and 3 · V
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
0.0° to 5.0°
0.001 A to 1.600 A
0.05 A to 35.00 A
0.25 A to 175.00 A
2 % of setting value or 1 mA
3°
measured
N
calculated
0
Increments 0.001 A
Increments 0.01 A
Increments 0.05 A
Increments 0.1°
Increments 1 s
Increments 0.1°
Increments 0.001 A
Increments 0.01 A
Increments 0.05 A
with integrated sen-
N
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015