ABB Relion 670 series - Completing the Test; Measuring the Operating Limit of Set Values

Table 29: Test points for phase-to-phase loops A-B
Test point Value Comments
1 X X1
R 0
2 X 0
R RLdFwd
3 X 0.85·X1 R=0.491·X1+0.5 RFLdFwdPP
R 0.85·X1·1/tan(60°)+0.5
RFLdFwdPP
4 X 0.85·X1
R -0.85·X1·tan (AngNegRes-90°)
5 X 0.5·RFLdFwdPP·tan (ArgLd)
R 0.5·RFLdFwdPP
6 X -0.5·RLdFwd·tan (ArgDir)
R 0.5·RLdFwd
The table showing test points for phase-to-phase loops is used together with figure 34.
11.4.6.1 Measuring the operating limit of set values
GUID-B1B7DEB6-7BC3-4A90-8D8F-E4E69B434AFA v3
Procedure:
1. Supply the IED with healthy conditions for at least two seconds.
2. Apply the fault condition and slowly decrease the measured impedance to find the operate value for
of the phase-to-ground loop ECG, test point 1, according to figure
33. Compare the result of the
measurement with the expected value according to table 28.
The corresponding binary signals that inform about the operation of the phase selection measuring
elements are available in the local HMI under
Main menu /Test /Function status /Impedance Protection /PhaseSelection(PDIS, 21) /
FRPSPDIS:x .
3. Repeat steps
1 to 2 to find the operate values for the remaining test points according to figure 33
and table
28.
When the load encroachment characteristic is deliberately set very high in order
not to have an influence, then the test points 2 and 5 can be replaced by test point
7.
4. Repeat steps 1 to 3 to find the operate value for the phase-to-phase fault in A - C according to
figure
34 and table 29.
11.4.6.2 Completing the test
M13906-301 v5
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
122 Transformer protection RET670
Commissioning manual
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