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Section 10
Testing functionality by secondary injection
1.
Connect the test set for injection three-phase voltages to the appropriate voltage terminals of
the IED.
2.
Inject voltage(s) in a way that relevant measured (according to setting parameter VoltageInput)
voltages are created from the test set.
3.
Overall check in principal as above (non-directional overcurrent feature) and correspondingly
for the undervoltage feature.
10.7.2.6
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
10.8
Secondary system supervision
10.8.1
Fuse failure supervision FUFSPVC
Prepare the IED for verification of settings as outlined in section
section
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 operate as expected according to actual
configuration. In the second part the relevant set operate values are measured.
10.8.1.1
Checking that the binary inputs and outputs operate 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 DISCPOS binary input.
•
•
•
•
3.
Disconnect the dc voltage from the DISCPOS binary input terminal.
4.
Connect the nominal dc voltage to the MCBOP binary input.
•
•
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.
BLKU and BLKZ signals should appear simultaneously wether the BLKU 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:
•
•
•
112
"Preparing for test"
in this chapter.
The signal BLKU should appear with almost no time delay.
The signals BLKZ and 3PH should not appear on the IED.
Only the distance protection function can operate.
Undervoltage-dependent functions must not operate.
The BLKUand 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 BLKU and BLKZ.
The signal 3PH will appear.
Signal 3PH after about 25ms
Signal BLKU after about 50ms
Signal BLKZ after about 200ms
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 505 372-UEN Rev. K
"Requirements"
and
Busbar protection REB670
Commissioning manual
SEMOD56488-99 v2
SEMOD53556-1 v1
M1405-2 v8
M1405-9 v8
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