Siemens siprotec 7SA6, Manual

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Technical Data
10-16
7SA6 Manual
C53000-G1176-C156
Voltage and angle-dependent current pickup (U/I/
ϕ
)
Characteristic different steps with settable inclinations
Minimum current Iph> 0.10 A to 4.00 A
1
) (steps 0.01 A)
Current in fault angle range I
ϕ
> 0.10 A to 2.00 A
1
) (steps 0.01 A)
Undervoltage phase–earth Uphe 20 V to 70 V (steps 1 V)
Undervoltage phase–phase Uphph 40 V to 130 V (steps 1 V)
(segregated for Iph> and I
ϕ
> and Iph>>)
Lower threshold angle
ϕ
> 30° to 60° (steps 1°)
Upper threshold angle
ϕ
< 90° to 120° (steps 1°)
Drop-off to pick-up ratio
Iph>, I
ϕ
>, approx. 0.95
Uphe, Uphph approx. 1.05
Measuring tolerances for sinusoidal
measured values
values of U, I ± 5 %
angles
ϕ
± 3°
Impedance starting
Minimum current Iph> 0.10 A to 4.00 A
1
) (steps 0.01 A)
The thresholds of the polygon set to the highest level are relevant taking into consid-
eration the corresponding direction
Drop-off to pick-up ratio approx. 1.05
*) Secondary values based on I
N
= 1 A; for I
N
= 5 A they must be multiplied with 5.
Distance
Measurement Characteristic polygonal
5 independent and 1 controlled zone
Setting ranges polygon:
I
Ph
> = min. current, phases 0.10 A to 4.00 A
1)
(steps 0.01·A)
X = reactance reach 0.05
Ω
to 250.00
Ω 2)
(steps 0.001
Ω
)
R = resistance tolerance phase–phase0.05
Ω
to 250.00
Ω 2)
(steps 0.001
Ω
)
RE = resistance tolerance phase–earth 0.05
Ω
to 250.00
Ω 2)
(steps 0.001
Ω
)
ϕ
Line
= line angle 30° to 89° (steps 1°)
α
Pol
= tilt angle for 1st zone 0° to 30° (steps 1°)
Direction determination for polygonal characteristic:
for all types of fault
with phase-true, memorizedor quadrature
voltages
Each zone can be set to forward, reverse or non-directional
Load trapezoid:
R
load
= minimum load resistance 0.10
Ω
to 250.00
Ω
2)
;
∞
(steps 0.001
Ω
)
ϕ
load
= maximum load angle 20° to 60° (steps 1°)
Drop-off to pick-up ratios approx. 1.06
Measured value correction mutual impedance matching for parallel
lines (ordering option)