7.
Activate the BLOCK binary input.
8.
Activate EXTPDIND binary input.
NO TRIP signal should appear.
9.
Reset both BLOCK and EXTPDIND binary inputs.
10. If Internal detection logic Contact function
selection = ContSel setting equals Pole
position from auxiliary contacts. Then set inputs POLE1OPN...POLE3CL in a status that
activates the pole discordance logic and repeats step 2 to step
11.
Unsymmetrical current detection with CB monitoring: Set measured current in one phase
to 110% of current release level. Activate CLOSECMD and measure the operating time of
the CCPDSC protection.
Use the TRIP signal from the configured binary output to stop the timer.
12.
Deactivate the CLOSECMD: Set measured current in one phase to 90% of Current Release
level. Activate CLOSECMD.
NO TRIP signal should appear.
13. Repeat the previous two steps using OPENCMD instead of CLOSECMD. Asymmetry
current detection with CB monitoring: Set all three currents to 110% of Current Release
level. Activate CLOSECMD.
NO TRIP signal should appear due to symmetrical condition.
14. Deactivate the CLOSECMD. Decrease one current with 120% of the current unsymmetrical
level compared to the other two phases. Activate CLOSECMD and measure the operating
time of the CCPDSC protection.
Use the TRIP signal from the configured binary output to stop the timer.
15. Deactivate the CLOSECMD. Decrease one current with 80% of the current unsymmetrical
level compared to the other two phases. Activate CLOSECMD.
NO TRIP signal should appear.
12.5.12.2
Completing the test
SEMOD55625-106 v4
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.
12.5.13
Directional underpower protection GUPPDUP
SEMOD175027-3 v5
Prepare the IED for verification of settings as outlined in section
in this chapter.
12.5.13.1
Verifying the settings
SEMOD175027-7 v7
The underpower protection shall be set to values according to the real set values to be used.
The test is made by means of injection of voltage and current where the amplitude of both
current and voltage and the phase angle between the voltage and current can be controlled.
During the test, the analog outputs of active and reactive power shall be monitored.
1.
Connect the test set for injection of voltage and current corresponding to the mode to
be used in the application. If a three-phase test set is available this could be used for all
the modes. If a single-phase current/voltage test set is available the test set should be
connected to a selected input for one-phase current and voltage.
1MRK 502 067-UEN B
Section 12
Testing functionality by secondary injection
173
Commissioning manual
