•
The BLKV 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
VDLDPU
of the DLD function.
3.
Apply normal conditions as in step
.
The BLKV, BLKZ and 3PH signals should reset, if activated, see step
4.
Change the voltages and currents in all three phases simultaneously.
The voltage change must be greater than the set value for
DVPU
and the current
change must be more than the set value for
DIPU
.
The BLKV, BLKZ and 3PH signals should not appear.
5.
Repeat step
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.
8.
Change the magnitude of the voltage and current for phase 1 to a value greater than
the set value for
DVPU
and
DIPU
.
9.
Check that the pickup output signals STDVA and STDIA and the general pickup
signals STDV or STDI are activated.
10. Check that the pickup 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.
6.6.2.5
Completing the test
Continue to test another function or end the testing by setting the parameter
TestMode
to
Disabled
under
Main menu/Tests/IED test mode/TESTMODE:1
. If another function is
tested, then set the parameter
Blocked
to
No
under
Main menu/Tests/Function test
modes/Secondary system supervision/SDDRFUF/SDDRFUF:1
for the function, or for
each individual function in a chain, to be tested next. Remember to set the parameter
Blocked
to
Yes
, for each individual function that has been tested.
6.7
Testing control functions
During periods of frequent counter state/value changes, if the auxiliary
power to the IED is interrupted, it is possible that this information will be
lost.
6.7.1
Synchrocheck, energizing check, and synchronizing SESRSYN
(25)
Section 6
1MRK 505 293-UUS A
Testing functionality
90
Commissioning manual
