Siemens siprotec 7SA522, User Manual

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Technical Data
10-11
7SA522 Manual
C53000-G1176-C119-2
Mutual Impedance
Matching
(for Parallel Lines) R
M
/R
L
0.00 to 8.00 (steps 0.01)
X
M
/X
L
0.00 to 8.00 (steps 0.01)
The matching factors for earth impedance and mutual impedance are valid also for
fault location.
Phase Preferences for double earth fault lagging phase–earth and phase–phase
in earthed systems leading phase–earth and phase–phase
all associated loops
only phase-to-earth loops
only phase-to-phase loop
Earth Fault
Detection Earth current 3I
0
> 0.05· A to 4.00·A
*)
(steps 0.01·A)
Displacement voltage 3U
0
> 1 V to 100 V;
∞
(steps 1 V)
Drop-out to pick-up ratios approx. 0.95
Measuring tolerances ± 5 %
*) Secondary values based on I
N
= 1 A; for I
N
= 5 A they must be multiplied with 5.
Distance
Measurement Characteristic polygonal or MHO–circle
(depending on ordered version);
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 0.01
Ω
)
R = resistance tolerance phase–phase0.05
Ω
to 250.00
Ω
2)
(steps 0.01
Ω
)
RE = resistance tolerance phase–earth 0.05
Ω
to 250.00
Ω
2)
(steps 0.01
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, memorized,
or quadrature voltages
directional sensitivity dynamically unlimited,
approx. 1 V under steady-state operation
All zones can be set to operate in forward or reverse direction, non-directional or
ineffective.
Setting ranges MHO–circle:
I
Ph
> = min. current, phases 0.10· A to 4.00·A
1)
(steps 0.01·A)
Z
r
= impedance reach 0.05
Ω
to 200.00
Ω
2)
(steps 0.01
Ω
)
Polarization with memorized or
quadrature voltages
All zones can be set to operate in forward or reverse direction or ineffective.
Load trapezoid:
R
load
= minimum load resistance 0.10
Ω
to 250.00
Ω
2)
;
∞
(steps 0.01
Ω
)
ϕ
load
= maximum load angle 20° to 60° (steps 1°)
Drop-out to pick-up ratios approx. 1.06
Measured value correction mutual impedance matching for parallel
lines (ordering option)