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1MRK 511 409-UUS Rev. K
1.
Check the input circuits and the trip value of the IMinOp current level detector by injecting current,
one phase at a time.
2.
Check the phase current blocking function for all three phases by injecting current, one phase at a
time. The output signals shall reset with a delay of 1 second when the current exceeds 1.5 · IBase.
3.
Inject a current 0.1 · IBase to the reference current input Analogue channel ID current input 5.
4.
Increase slowly the current in one of the phases and check that FAIL output is obtained when the
current is above 0.9 · IBase.
11.8.1.2
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.8.2
Fuse failure supervision FUFSPVC
Prepare the IED for verification of settings as outlined in section
for test"
in this chapter.
The verification is divided in two main parts. The first part is common to all fuse failure supervision
options, and checks that binary inputs and outputs trip as expected according to actual configuration. In
the second part the relevant set trip values are measured.
11.8.2.1
Checking that the binary inputs and outputs trip as expected
1.
Simulate normal operating conditions with the three-phase currents in phase with their
corresponding phase voltages and with all of them equal to their rated values.
2.
Connect the nominal dc voltage to the 89bS binary input.
•
•
•
•
3.
Disconnect the dc voltage from the 89b binary input terminal.
4.
Connect the nominal dc voltage to the MCBOP binary input.
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•
5.
Disconnect the dc voltage from the MCBOP binary input terminal.
6.
Disconnect one of the phase voltages and observe the logical output signals on the binary outputs
of the IED.
BLKV and BLKZ signals should appear simultaneously wether the BLKV and BLKZ reset depends
on the setting SealIn "on" or "off". If "on" no reset, if "off" reset.
7.
After more than 5 seconds disconnect the remaining two-phase voltages and all three currents.
•
•
8.
Establish normal voltage and current operating conditions simultaneously and observe the
corresponding output signals.
They should change to logical 0 as follows:
Phasor measurement unit RES670
Commissioning manual
The signal BLKV should appear with almost no time delay.
The signals BLKZ and 3PH should not appear on the IED.
Only the distance protection function can trip.
Undervoltage-dependent functions must not trip.
The BLKVand BLKZ signals should appear without any time delay.
All undervoltage-dependent functions must be blocked.
There should be no change in the high status of the output signals BLKV and BLKZ.
The signal 3PH will appear.
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Testing functionality by secondary injection
"Requirements"
and section
Section 11
M12917-43 v4
M1405-2 v8
"Preparing
M1405-9 v8
129
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