ABB RED670 Commissioning Manual page 124

Section 11
Testing functionality by secondary injection
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 31. Compare the result of the
measurement with the expected value according to table 29.
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 29.
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.
11.4.7 High speed distance protection zones, quadrilateral and mho
characteristic ZMFPDIS (21)
Prepare the IED for verification of settings outlined in section
test" in this chapter.
11.4.7.1 Function revision history
Document
revision
A
B
C
D
E
F
Table continues on next page
118
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
32 and table 30.
This under-impedance-based criterion is defined by the two setting parameters XStart
and RStart. These two settings are common for both Ph-Ph and Ph-Gnd measurement
loops. In order to ensure proper operation of the distance zones the under-impedance
based starting element shall be set in such a way to always cover (i.e. be larger than) all
used distance zones for both Ph-Ph and Ph-Gnd loops.
Product History
revision
2.2.1 Impedance measurement and supervision added (ZMMXU).
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.4 -
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"Requirements" and section
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Line differential protection RED670
Commissioning manual
31
M13906-301 v5
"Preparing for