DirPrinc_OC1 or DirPrinc_OC2 set to or in a way that the operate value also is
dependent on the angle between current and polarizing voltage according to the I ·
cos(F) law (setting parameter DirPrinc_OC1 or DirPrinc_OC2 set to I · cos(F). This
has to be known if a more detailed measurement of the directional characteristic is
made, than the one described below.
Procedure
1. Connect the test set for injection of three-phase currents and three-phase
voltages to the appropriate current and voltage terminals of the IED.
2. Inject current(s) and voltage(s) in a way that relevant measured (according to
setting parameter CurrentInput and VoltageInput) currents and voltages are
created from the test set.
3. Set the relevant measuring quantity current to lag or lead (lag for negative RCA
angle and lead for positive RCA angle) the relevant polarizing quantity voltage
by an angle equal to the set IED characteristic angle (rca-dir) when forward
directional feature is selected and the CTstarpoint configuration parameter is set
to ToObject.
If reverse directional feature is selected or CTstarpoint configuration parameter
is set to FromObject, the angle between current and polarizing voltage shall be
set equal to rca-dir+180°.
4. Overall check in principal as above (non-directional overcurrent feature)
5. Reverse the direction of the injection current and check that the protection does
not operate.
6. Check with low polarization voltage that the feature becomes non-directional,
blocked or with memory according to the setting.
10.7.1.5 Over/Undervoltage feature
Procedure
1. Connect the test set for injection three-phase voltages to the appropriate voltage
terminals of the IED.
2. Inject voltage(s) in a way that relevant measured (according to setting parameter
VoltageInput) voltages are created from the test set.
3. Overall check in principal as above (non-directional overcurrent feature) and
correspondingly for the undervoltage feature.
10.7.1.6 Completing the test
Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.
Section 10 1MRK 511 360-UEN A
Testing functionality by secondary injection
134 Bay control REC670 2.1 IEC
Commissioning manual
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