Completing The Test; Single Command, 16 Signals Singlecmd; Interlocking - ABB rec670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.9.4.9
10.9.5
10.9.6
166
4. Review the setting for CircCurrBk to confirm whether a circulating current limit
will result in an Alarm state, Auto Block or Auto&Man Block of the automatic
voltage control for tap changer, for parallel control function TR8ATCC.
5. Inject a voltage U
B
6. Inject a load current for Transformer 1 that is equal to rated load current I2Base
and a load current for Transformer 2 that is 1% less than (I2Base – (I2Base ·
CircCurrLimit))
7. Confirm that the automatic voltage control for tap changer, for parallel control
function TR8ATCC responds in accordance with the setting for CircCurrBk.
Alarm and blocking conditions can be confirmed through interrogation of the
event menu or the control menu on the local HMI.
VTmismatch during parallel operation
1. Confirm that OperationPAR is set to MF for each transformer in the parallel
group.
2. Review the setting for VTmismatch and tVTmismatch.
3. Inject a voltage U
B
– (VTmismatch · USet)) for Transformer 2.
4. This condition should result in a VTmismatch which will mutually block the
operation of the automatic voltage control for tap changer, parallel control
function TR8ATCC for all transformers connected in the parallel group, which
can be confirmed through interrogation of the local HMI.
5. Confirm that the automatic voltage control for tap changer, parallel control
function TR8ATCC responds in accordance with the setting for CircCurrBk.

Completing the test

Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.

Single command, 16 signals SINGLECMD

For the single command function block, it is necessary to configure the output signal
to corresponding binary output of the IED. The operation of the single command
function (SINGLECMD) is then checked from the local HMI by applying the
commands with Mode = Off, Steady or Pulse, and by observing the logic statuses of
the corresponding binary output. Command control functions included in the
operation of different built-in functions must be tested at the same time as their
corresponding functions.

Interlocking

Prepare the IED for verification of settings outlined in section
verify settings".
equal to USet for each transformer.
equal to USet for Transformer 1 and a voltage less than (USet
1MRK 511 360-UEN A
"Preparing the IED to
Bay control REC670 2.1 IEC
Commissioning manual