Issue February 2002
Document Number: 13124
- 18 -
5.6. Mode Ic /
Σ
switchings, green lettering
In this mode the capacitor steps are examined. The capacitor current and the number of switching
operations of the selected step are alternately displayed.
By means of the key
or a step can be called upon.
The step LEDs 1 to 12 show for which step the values are being displayed. By means of the LEDs "
Σ
"
and "Ic", the displayed value can be identified:
Ic
= Current in Ampere of the selected capacitor step. The current is readjusted via the current
transformer's transformation ratio which is set under parameter
-18-
.
Σ
switching operations
=
Number of switching operations of the contactor of the selected
capacitor step. The point symbolizes the thousandth place.
Range of switching cycles
Display
0 – 9999
8.888
10,000 - 99,999
88.88
100,000 –999,999
888.8
The capacitor contactors will have to be replaced after about 100,000 switching operations. A regular
check is strongly recommended.
By pressing simultaneously the switching counter of the selected step can be
reset.
5.7. Mode harmonic current [%] , orange lettering
By means of the FFT-type analysis (
F
ast-
F
ourier-
T
ransformation), the
ESTAmat PFC
Controller
can determine harmonic currents of the 3rd, 5th, 7th, 11th, 13th, 17th and 19th harmonic. They are
displayed in percentage of the current of the fundamental frequency. These percentage values are
displayed up to the 17th harmonic. (
Har.: 3 5 7 11 13 17
)
By means of the key
or a harmonic can be selected.
In the step display one can see which harmonic has been selected.
