Siemens siprotec 7SA6, Manual

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Technical Data
10-17
7SA6 Manual
C53000-G1176-C156
Measuring tolerances
with sinusoidal quantities
and U
K
/U
N
>
0.1
1
) Secondary values based on I
N
= 1 A; for I
N
= 5 A they must be multiplied with 5.
2
) Secondary values based on I
N
= 1 A;
for I
N
= 5 A the impedances must be devided by 5.
Times Shortest trip time approx. 17 ms (50 Hz) / 15 ms (60 Hz)
with fast relays
approx. 12 ms (50 Hz) / 10 ms (60 Hz)
with high–speed relays
Drop-off time approx. 30 ms
Stage timers 0.00 s to 30.00 s;
∞
(steps 0.01 s)
for all zones;
separate time setting possibilities for
single-phase and multi-phase faults
for the zones Z1, Z2, and Z1B
Time expiry tolerances 1 % of set value or 10 ms
The set times are pure delay times.
Emergency
Operation In case of measured voltage failure, See Section 10.10
e.g. voltage secondary mcb trip
∆
X
X
--------
5 % for 30°
ϕ
sc
90°
≤ ≤ ≤
∆
R
R
--------
5 % for 0°
ϕ
sc
60°
≤ ≤ ≤
∆
Z
Z
-------
5 % for –30°
ϕ
sc
ϕ
line
–
30°
≤ ≤ ≤