X1OutRv
ZL
j
j
R
X
X1OutFw
X1InFw
1
RLdOutFw
RLdInFw
RLdOutRv
RLdInRv
2
3
4
X1InRv
IEC09000226_1_en.vsd
IEC09000226 V1 EN-US
Figure 47: Operating principle and characteristic of the power swing detection function
(settings parameters in italic)
Where:
RLdInFw =
RLdOutFw · kLdRFw
RLdInRv =
RLdOutRv · kLdRRv
X1OutFw =
(RLdOutFw - RLdInFw)
X1OutRv =
(RLdOutFw - RLdInFw)
12.4.9.1
Verifying the settings
M13888-11 v6
Preconditions
The following output signal shall be configured to binary output available: ZOUT, measured
impedance within outer impedance boundary.
1.
Keep the measured current as close as possible to its rated value or lower. Keep it
constant during the test, but ensure that it is higher than the set minimum operating
current.
2.
Ensure that the maximum continuous current to the IED does not exceed four times its
rated value, if the measurement of the operating characteristics runs under constant
voltage conditions.
3.
Make the necessary connections and settings of the test equipment for test of point 1
according to figure
1MRK 502 067-UEN B
Section 12
Testing functionality by secondary injection
127
Commissioning manual