ABB RELION RET670, Installation And Commissioning Manual

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The voltage change should be greater than set DU> and the current change
should be greater than the set DI< .
The BLKU, BLKZ and 3PH signals should not appear.
6. Disconnect the dc voltage to the CBCLOSED binary input.
7. Apply normal conditions as in step 1 .
8. Repeat step 3 .
9. Connect the nominal voltages in all three phases and feed a current below the
operate level in all three phases.
10. Keep the current constant. Disconnect the voltage in all three phases
simultaneously.
The BLKU, BLKZ and 3PH signals should not appear.
13.10.2.5 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.
13.11 Control
13.11.1 Synchrocheck, energizing check, and synchronizing
SESRSYN
This section contains instructions on how to test the synchrocheck, energizing
check, and synchronizing function SESRSYN for single and double CB and for 1½
breaker arrangements.
This section contains instructions on how to test the synchrocheck and energizing
check for single CB with or without the synchronizing function.
Prepare the IED for verification of settings as outlined in section "Overview" and
section "Preparing for test" in this chapter.
At commissioning and periodical checks, the functions shall be tested with the used
settings. To test a specific function, it might be necessary to change some setting
parameters, for example:
• AutoEnerg = On/Off/DLLB/DBLL/Both
• ManEnerg = Off
• Operation = Off , On
• Activation of the voltage selection function if applicable
The tests explained in the test procedures below describe the settings, which can be
used as references during testing before the final settings are specified. After
testing, restore the equipment to the normal or desired settings.
Section 13
1MRK 504 088-UEN C
Verifying settings by secondary injection
174
Installation and commissioning manual