• The BLKU and BLKZ signals appear without any time delay. The
BLKZ signal will be activated only if the internal deadline detection is
not activated at the same time.
• 3PH should appear after 5 seconds, if the remaining voltage levels are
lower than the set UDLD< of the dead line detection function.
3.
Apply normal conditions as in step
1.
The BLKU, BLKZ and 3PH signals should reset, if activated, see step 1 and
2.
4. Change the voltages and currents in all three phases simultaneously.
The voltage change must be higher than the set value DU>
and the current
change must be higher than the set value DI<.
The BLKU, BLKZ and 3PH signals should not appear.
5. Repeat step
2.
6. Connect the nominal voltages in all three phases and feed a current below the
operate
level in all three phases.
7. Keep the current constant. Disconnect the voltage in all three phases
simultaneously.
The BLKU, BLKZ and 3PH signals should not appear.
8. Change the magnitude of the voltage and current for phase 1 to a value higher
than the set value DU> and DI<.
9. Check that the start output signals STDUL1 and STDIL1 and the general start
signals STDU or STDI are activated.
10. Check that the start output signals for the current and voltage phases 2 and 3
are activated by changing the magnitude of the voltage and current for phases
2 and 3.
11.9.2.6 Completing the test
M1405-130 v5
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.
11.9.3 Fuse failure supervision VDSPVC
GUID-DCCD4C4A-8335-43BA-A2B2-9994380985B0 v2
Prepare the IED for verification of settings outlined in Section
"Preparing the IED
to verify settings".
GUID-004BFFE4-B1C1-4C0E-8D7A-ABE7B566AB28 v2
Checking the operation of binary input and output
1. Simulate normal operation conditions with three-phase voltage on the main
fuse group and the pilot fuse group. Ensure the values are equal to their rated
values.
2.
Disconnect one of the phase voltage from the main fuse group or the pilot fuse
group. Observe the binary outputs of the IED. The MAINFUF or the
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 219
Commissioning manual
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