Issue February 2002
Document Number: 13124
- 12 -
By pressing the key this process can be aborted.
4.4. Initialization :
The P.F. Controller offers three modes of initialization:
•
Fully automatic initialization
AU1
(= standard setting)
The
ESTAmat PFC
determines the location of the current transformer, the output and number of
the capacitor steps, and the switching program. The operator must only set the measuring voltage
mode phase to phase
L-L
or phase to neutral
L-0
. (refer to 6.3.1 and 6.3.2).
•
Semi-automatic initialization
AU2
The
ESTAmat PFC
Controller determines, after presetting the location of the current
transformer, the output and number of the capacitor steps, and the switching program.
•
Manual initialization
AU3
The operator has to set the location of the current transformer, the output and number of capacitor
steps, and the switching program.
The P.F. Controller is supplied with the fully automatic initialization mode
AU1
set, which is the normal
application. The fully automatic initialization may not be successful in case of strong oscillations in
the public mains. In such a case, the semi-automatic
AU2
or the manual initialization
AU3
can be
applied. The initialization mode is stored as parameter
-1-
(item 6.3.1).
How to change the initialization mode is described under items 6.2 and 6.3.1 .
4.4.1. Fully automatic initialization
AU1
With this mode of initialization, the current transformer may be connected to any phase. Connection of
both the current transformer
k/l (S1/S2)
and the measuring voltage is also at option. The mode of
measuring voltage will have to be set either phase to phase
L-L
or phase to neutral
L-0
(=standard
setting). Refer to items 6.2 and 6.3.2.
When the supply voltage is applied, the setting values will be displayed as described under item 4.3.
The fully automatic initialization
AU1
comprises :
-
part 1 : determination of current transformer location and
-
part 2 : recording the currents of the capacitor steps
4.4.1.1. Part 1 : Current transformer location
First of all, the set re-switching blocking delay is effective. During this time,
AU1
is being displayed
and a decimal point is flashing. When the display alternates between
AU1
and
NO
, it means that there is
still stored a C.T. location of a previous application. Refer to item 4.4.1.3. If this is not the case, the
ESTAmat PFC
Controller
switches capacitor steps in and out several times after the re-switching
blocking delay has elapsed and subject to the mains conditions. The number of switching cycles
carried out will be displayed after the last step has been switched out. This number may range between
-0-
and
-5-
. When the display shows the figure
-5-
, part 1 of the initialization is completed.
