Siemens siprotec 7SA522, User Manual

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Technical Data
10-12
7SA522 Manual
C53000-G1176-C119-2
Measuring tolerances
with sinusoidal quantities
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 they must be devided by 5.
Times Shortest trip time approx. 17 ms (50 Hz) / 15 ms (60 Hz)
Drop-out 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 10.9
e.g. voltage secondary mcb trip
10.3 Power Swing Supplement
Power swing detection rate of change of the impedance phasor
and observation of the path curve
Distance between power swing 5
Ω
*)
measuring range PPOL and
fault detection range APOL
Max. power swing frequency approx. 7 Hz
Power swing blocking programs Block 1st zone only
Block higher zones
Block 1st and 2nd zone
Block all zones
Out-of-step trip Trip following instable power swings
(out-of-step)
*) Secondary values based on I
N
= 1 A; for I
N
= 5 A the values are to be divided by 5.
∆
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°
≤ ≤ ≤