Technical documentation
Rev. 02
Reactive Factor Controller CX plus
9
5 Commissioning
The CX plus is pre-programmed with default values, which enable an operation
almost without further settings, if connected to a 400 V supply network according to
the wiring diagram.
The measurement values of current and power are only displayed, if the current
transformer factor has been set.
NOTE:
If the connection of measuring voltage and current results in a phase
between voltage and current not equal to 0° resp. 90°, execute the AUTO
INITIALISATION (AI) first or manually set the phase correction angle (setup menu:
206) correctly. The table with the phase correction angles depending on the
connection of measuring voltage and current can be found in the annex, paragraph
Setting of phase correction angles.
NOTE:
The “Automatic initialisation” only identifies the correct phase between
measuring voltage and current. Furthermore, the AI determines which switching
outputs are occupied and which not. Switching outputs which are not occupied are
set to the step type “FOFF”. The step sizes are determined at first via the control in
the normal control mode.
After applying the mains voltage, the message
“AUTO”
appears on the display and
the currently measured COS
is displayed, if measuring voltage and current are
within the tolerance. Normally, the COS
should be inductive (display of a small
i
behind the first line). From this moment on, the discharge time lock of the capacitors
is active (factory setting: 75 sec.). After the discharge time lock, the CX plus starts
controlling. In the process, the step sizes are determined automatically. Step outputs
which are not occupied are set to the step type “FOFF” (Fix-Off), if the first three
switching processes have been unsuccessful. I.e. the control ignores these steps.
!
CAUTION
Exception: The current transformer factor (SETUP/Ct) must be entered in order to correctly
calculate the measurement values and to correctly identify the step sizes.
