Power Swing Supplement - Siemens siprotec 7SA6 User Manual

Technical Data
Times
Emergency
Operation
10.3

Power Swing Supplement

10-14
Measuring tolerances
with sinusoidal quantities
N >
and U /U 0.1
K
1
) Secondary values based on I
2
) Secondary values based on I
for I = 5 A the impedances must be devided by 5.
N
Shortest trip time
Drop-off time
Stage timers
Time expiry tolerances
The set times are pure delay times.
In case of measured voltage failure,
e.g. voltage secondary mcb trip
Power swing detection
Max. power swing frequency
Power swing blocking programs
Out-of-step trip
∆X
≤
5 %
------- -
X
∆R
≤
5 %
------- -
R
∆Z
≤
5 %
------ -
Z
= 1 A; for I = 5 A they must be multiplied with 5.
N N
= 1 A;
N
approx. 17 ms (50 Hz) / 15 ms (60 Hz)
approx. 30 ms
0.00 s to 30.00 s; ∞
for all zones;
separate time setting possibilities for
single-phase and multi-phase faults
for the zones Z1, Z2, and Z1B
1 % of set value or 10 ms
See Section 10.9
Rate of change of the impedance phasor
and observation of the path curve
approx. 7 Hz
Block 1st zone only
Block higher zones
Block 1st and 2nd zone
Block all zones
Trip following instable power swings
(out-of-step)
≤ ϕ ≤
for 30° 90°
sc
≤ ϕ ≤
for 0° 60°
sc
≤ ϕ ϕ ≤
for –30°
–
sc line
(steps 0.01 s)
7SA6 Manual
C53000-G1176-C133-1
30°