ABB Relion 670 series, Installation And Commissioning Manual

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15.10.1.2 Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off . Restore connections and settings to their original values, if they were
changed for testing purposes.
15.10.2 Fuse failure supervision SDDRFUF
Prepare the IED for verification of settings outlined in section "Overview" and
section "Preparing 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 operate as
expected according to actual configuration. In the second part the relevant set
operate values are measured.
15.10.2.1 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.
•
The signal BLKU should appear with almost no time delay.
• No signals BLKZ and 3PH should appear on the IED.
• Only the distance protection function can operate.
• Undervoltage-dependent functions must not operate.
3. Disconnect the dc voltage from the DISCPOS binary input terminal.
4. Connect the nominal dc voltage to the MCBOP binary input.
•
The BLKU and BLKZ signals should appear without any time delay.
• All undervoltage-dependent functions must be blocked.
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
simultaneously appear.
BLKU and BLKZ signals should simultaneously appear.
7. After more than 5 seconds disconnect the remaining two-phase voltages and
all three currents.
•
There should be no change in the high status of the output signals
BLKU and BLKZ.
• The signal 3PH will appear.
8. Establish normal voltage and current operating conditions simultaneously and
observe the corresponding output signals.
They should change to logical 0 as follows:
Section 15
1MRK 502 029-UEN A
Verifying settings by secondary injection
210
Installation and commissioning manual