•
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 in all three phases simultaneously.
The voltage change must be greater than the set value for
DVPU
and the current
constant above 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.
To test the internal signals
ifDeltaU
and
ifDeltaI
, 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 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.
6.7.2.5
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/1:TESTMODE
. If another
function is tested, then set the parameter
Blocked
to
No
under
Main menu/Tests/
Function test modes/Secondary system supervision/SDDRFUF/1:SDDRFUF
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.
6.8
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.
Section 6
1MRK 506 331-UUS A
Testing functionality
102
Commissioning Manual
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