Siemens siprotec 7SA6, Manual

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Technical Data
10-33
7SA6 Manual
C53000-G1176-C156
10.11 High-Current Switch-On-To-Fault Protection
Pick-up High current pick-up I>>> 1.00 A to 25.00 A
1
) (steps 0.01 A)
Drop-off to pick-up ratio approx. 0.90
Pick-up tolerance
≤
3 % of set value or 1% of I
N
Times
Shortest tripping time approx. 13 ms for fast relays and 8 ms for
high-speed relays
10.12 Earth Fault Detection in a Non-Earthed System
Pickup/
Trip Displacement voltage 3U
0
> 1 V to 150 V (steps 1 V)
Time delay T
Sens.E/F
0.00 s to 320.00 s (steps 0.01 s)
Optional trip with
additional time delay
T
Sens.E/F TRIP
0.00 s to 320.00 s (steps 0.01 s)
Measuring tolerance 5 % of set value
Time tolerance 1 % of set value or 10 ms
Pick-up time min. 32 ms
Drop-off time 26 ms
The set times are pure delay times.
Phase
Determination Measuring principle voltage measurement phase-earth
Earth fault phase U
ph min
10 V to 100 V (steps 1 V)
Healthy phases U
ph max
10 V to 100 V (steps 1 V)
Messtoleranz 5 % of set value
Direction
Determination Measuring principle active / reactive power measurement
Pick-up value I>
Sens.E/F
0.003 A to 1.000 A
2
) (steps 0.001 A)
Angle correction for cable core
balance current transformer
0.0° to 5.0° (steps 0.1°)
in 2 steps
Measuring tolerance 10 % of set value
for tan
ϕ ≤
20 (for active power)
2
) Sensitive earth current input independent from I
N
.