Issue February 2002
Document Number: 13124
- 4 -
Prerequisite for starting the fully automatic initialization:
•
The C.T. secondary current must be at least 25 mA.
•
The current of the smallest capacitor connected must be at the C.T. secondary side in the range of
0.025 to 1.00 A.
Sequence of the fully automatic initialization :
Display Function
AU1
-1- to -5-
NO
The Controller starts with step 1 and continues switching in steps until the
location of the current transformer has been determined due to the changes in
current. The trial runs are counted and evaluated. The C.T. location is determined
only after 5 consecutive trial runs producing all the same result. The Controller starts
at the meter reading -1- and stops, in the normal case, at -5- after 5 trial runs.
In cases of unfavourable conditions of the mains supply, the value of the meter
reading may reduce again. If the value -3- is not reached, either the setting AU2 or
AU3 should be selected. Refer to item 6.3.1 in this case.
Continuous changes of display between AU1 and NO indicates that the Controller
has already stored a connection value for the C.T. location. The Controller will start
at AU2 after the re-switching blocking delay time has elapsed. Refer to item 4.4.1.3
for this.
An activated blocking delay time for re-switching for one step is indicated by a
flashing decimal point
Having identified the location of the current transformer, the current or output ratings of the capacitor
steps will be determined.
Display Function
AU2
2.1 to 2.3
Starting with step 1, the Controller switches in each individual step briefly, and
switches it out again immediately. (PFC6 : 6 steps, PFC12: 12 steps).
The procedure is repeated three times.
Normally, the ESTAmat PFC Controller terminates a successful initialization after approximately 5
minutes, and correctly determines the configuration of the plant, and indicates the actual power factor.
If one of the following symbols is on display, the following conditions may be the cause:
Display Condition Remedy
≡I
The measuring current is less than 25 mA. Check C.T. electric circuit
≡
0
The measuring current is in excess of 5.3A. C.T. transformation ratio is too
small
≡
U
The measuring voltage is missing. Check connection of Controller
≡
AU1
AU1 could not be carried out correctly. Possible
causes: quick reversals of load, insufficient
compensation output, load too low.
Set AU2. Refer to item 6.3.1.
≡
AU2
AU2 could not be carried out correctly. Possible
causes: quick reversals of load, no switching of
capacitor steps.
Set AU3. Refer to item 6.3.1.
SLE The faults ≡AU1 or ≡AU2 have appeared five
times in succession. This condition can be
modified only upon fundamental change of load.
Set AU3. Refer to item 6.3.1.
A target factor of 1.00 is preset as standard.
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