Technical documentation
Rev. 02
Reactive Factor Controller CX plus
36
Automatic connection identification voltage measurement:
By means of the set nominal voltage, the controller calculates the voltages
for both connection types (L-L and L-N) from the measured voltage. If
these are within the set voltage tolerance (factory setting +/- 10%), the
controller automatically determines the connection type of the voltage
measurement. This cannot be changed manually.
If the measured voltage is out of this tolerance, the connection type of
voltage measurement can be set manually.
206
Phase correction angle
0...345
Depending on the connection of measuring voltage and current, a phase to
one another results
phase correction angle. The phase correction angle
must be set respectively,
because otherwise, the calculations of the
powers, of the COS-PHI, of the power factor and of the step sizes are
incorrect. The control does not work correctly or not at all.
The phase correction angle can be identified automatically by executing
the automatic initialisation or it can be entered manually in
15° steps
.
If the AI correctly identified the phase correction angle for current and
voltage measurement, this value should not be changed, because
otherwise, the control does not work correctly anymore.
In case the
automatic initialisation
failed due to unfavourable network
conditions, the phase correction angle can be entered manually, or an
incorrectly identified phase angle can be corrected. The table “
Setting of
phase correction angle depending on the connection
” in the ANNEX
offers an overview of the connection possibilities and the phase correction
angles to be set.
207
Start automatic initialisation
Yes/No
"YES":
Starts the “Automatic initialisation (AI)”.
Starts the “Automatic initialisation” after activating the AI (“YES”),
the setting is immediately
set back to “NO” then. The setting remains
on “YES” until the AI is started (U alarm, I-Low alarm).
The
automatic initialisation
switches all outputs one by one. In this way,
the controller can identify the used switching outputs. In addition to this,
the phase (connection of measuring voltage and current) is identified. In
this way, a potentially incorrect connection of the current resp. voltage
input can be identified and corrected by setting the phase correction angle.
The
automatic initialisation
only starts, if current and voltage are within
the set tolerances.
Outputs which are set to the step type “FON” or “Flty”, are not considered
during the
automatic initialisation
.
NOTE:
The automatic initialisation (AI) can only identify phases, if
capacitors are connected to the switching outputs. If the CX plus
compensates the reactive power by means of reactors, this function will
cause errors. AI works best when there are constant load conditions.
208
Synchronisation frequency
Auto/Fix50/Fix60
For highest accuracy of the measurement of voltage and current, it is
necessary to synchronise the sample values to the mains frequency. An
automatic synchronisation may be disturbed due to strong commutation
notches of the mains voltage despite internal filtering. This leads to huge,
striking measurement errors.
Therefore, the following settings are possible:
