ABB PQFS Installation, Operation And Maintenance Instructions page 96

Text on PQF Manager display
Ratio found
CT Ratio L1
CT Ratio L2
CT Ratio L3
Remark:
(a)
The first phase has to be acknowledged before the second phase is displayed...
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.
96 The PQF-Manager user interface ç Manual Power Quality Filter PQFS
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
o
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 with the
order to approve the value entered
explains the meaning of the text that appears on the display:
Table 42: Automatic CT detection ratio-results presentation
(a)
(a)
(a)
After acknowledging the last phase with
reset and the new values will be taken into account. Pressing
time will interrupt the 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
o
problem. Table 43
Table 43: Possible error messages during automatic CT identification
The most common causes for these messages are:
§
CTs not connected or shorted
§
CTs connected in open loop configuration
has to be pressed.
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
gives a list of the possible error messages.
and if desired. In
Table 42
, the filter will automatically
at any