Measuring The Operating Limit Of Set Values; Completing The Test - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
Table 29:
Test point
1
2
3
4
5
6
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

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
and table 28.
4. Repeat steps
figure
11.4.6.2

Completing the test

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.
122
Test points for phase-to-phase loops A-B
Value
X X1
R 0
X 0
R RLdFwd
X 0.85·X1
R 0.85·X1·1/tan(60°)+0.5
RFLdFwdPP
X 0.85·X1
R -0.85·X1·tan (AngNegRes-90°)
X 0.5·RFLdFwdPP·tan (ArgLd)
R 0.5·RFLdFwdPP
X -0.5·RLdFwd·tan (ArgDir)
R 0.5·RLdFwd
1 to 2 to find the operate values for the remaining test points according to figure
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.
1 to 3 to find the operate value for the phase-to-phase fault in A - C according to
34 and table 29.
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Comments
R=0.491·X1+0.5 RFLdFwdPP
GUID-B1B7DEB6-7BC3-4A90-8D8F-E4E69B434AFA v3
Transformer protection RET670
1MRK 504 165-UUS Rev. J
33
M13906-301 v5
Commissioning manual