Power Swing Supplement - Siemens siprotec 7SA522 User Manual

Technical Data
Times
Emergency
operation
10.3

Power Swing Supplement

10-12
Measuring tolerances
with sinusoidal quantities
1
) Secondary values based on I
2
) Secondary values based on I
Shortest trip time
Drop-out 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
Distance between power swing
measuring range PPOL and
fault detection range APOL
Max. power swing frequency
Power swing blocking programs
Out-of-step trip
*) Secondary values based on I
∆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; for I = 5 A they must be devided by 5.
N 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
5 Ω *)
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)
= 1 A; for I = 5 A the values are to be divided by 5.
N N
≤ ϕ ≤
for 30° 90°
sc
≤ ϕ ≤
for 0° 60°
sc
≤ ϕ ϕ ≤
for –30°
–
sc line
(steps 0.01 s)
7SA522 Manual
C53000-G1176-C119-2
30°