ABB PQFS Installation, Operation And Maintenance Instructions page 111

If the CTs have been wrongly connected and the results are acknowledged by the
commissioning engineer, the filter controller will automatically take into account the
wrong positions and correct them internally. Hence, there is no need to correct the CT
connections manually. However, in line with proper installation guidelines, it may be
recommended to correct physically the CT installation. In that case, the CT setup of
the filter has to be adapted accordingly.
−
When the CT positions have been acknowledged the filter will carry on by showing
the CT ratio found phase per phase. The values shown are indicative only and
always have to be verified by the commissioning engineer. He can change the
values by entering the right CT ratio. In order to approve the value entered
has to be pressed.
display:
Table 45: Automatic CT detection ratio-results presentation
Text on PQF-Manager display
Ratio found
(a)
CT Ratio L1
(a)
CT Ratio L2
(a)
CT Ratio L3
Remark:
(a)
The first phase has to be acknowledged before the second phase is displayed...
After acknowledging the last phase with
new values will be taken into account. Pressing
automatic CT detection process. In single unit filters, original CT-values and positions
existing prior to the start of the procedure will be restored. In multi-unit filters, the new
values will be stored in the units for which the CT setting were already accepted, and will
be restored to the initial value in the other units.
If the CT identification ended unsuccessfully:
−
The filter displays an error message indicating the reason for the problem.
46 gives a list of the possible error messages.
Table 46: Possible error messages during automatic CT identification
PQF-Manager error messages during automatic CT identification
The CT identification found inconsistent CT positions.
The CT identification did not end within an appropriate time frame.
The CT identification required an abnormally high DC voltage.
The most common causes for these messages are:
•
CTs not connected or shorted
Table 45 explains the meaning of the text that appears on the
Meaning
Ratio found for the CT in the considered phase
E.g. 200 means a CT of 1000/5
Ratio that will be used by the filter for the CT physically
connected in phase 1 (L1, R, U) of the installation
Ratio that will be used by the filter for the CT physically
connected in phase 2 (L2, S, V) of the installation
Ratio that will be used by the filter for the CT physically
connected in phase 3 (L3, T, W) of the installation
Manual Power Quality Filter PQFS  Commissioning instructions 111
, the filter will automatically reset and the
at any time will interrupt the
Table