General
Electricity networks are gradually overloaded as a result of increasing use and demand of
emerging technologies In all sectors. While the compensation becomes a nightmare for the
companies having unstable load, even the companies having stable load in the past have now
difficulties to provide reactive compensation. Therefore, the period of reactive power relays
measured by single-phase will be over in the close future. KAEL Elektronik has incorporated a
brand-new device to the electricity sector having much more steps, quite good equipped in terms
of function means and software with improved running algorithms, by combining the achievements
and experiences coming along with VARkombi-12-PC-TFT-OG regarding the reactive power
compensation.
Facilities are provided to the users with many graphics and animation by using large 3.2 " color
LCD screen on the device. Moreover, the microprocessor in the device is running very fast and an
operating system is used. This provides to reach all transactions running simultaneously.
In case the
blue led
on the lower left corner of the front panel of the device flashes, this
means it is close to the value of penalty % and authorized persons should be informed as
soon as possible. This is also useful in terms of taking the attention of the end-user in
case of penalty who does not know this functional issue.
■ The connections of the device should be made while the system is energy-free.
■ VARkombi-12-PC-TFT-OG should be connected as shown in the connection diagram.
■ Three phase and neutral connections should be made to the voltage input. Phase should not
be given instead of neutral. Otherwise the device can be damaged.
■ Current connections should be made as to match the same phase with the same current
transformer. Scheme should be followed.
■ The value of the selected current transformers should not be under the real load values but
should be X/5 amper. It is also advised to choose 0.5 class.
■ Connect the “C1, C2, C3” common phase inputs to the same phase with FF type fuses
seperately. Select the fuses to be used according to the specified current value.
■ The outputs of the steps are not needed to be made in any order. However, the first 6 steps
can consist of triple-phase capacitor groups. It is recomended to connect single-phase
capacitors to the second and third 6 steps and, to connect capacitors or reactors to the third 6
steps in terms of accepting the statements in this manual.
■ Make the connections to the generator if it is used.
■ Make RS485 connection. (Not applicable in VARkombi-12-TFT-OG)
■ Do not energize the device without ensuring the connections checked by measurement
instruments.
Making the Connections
1 2 3
4
5 6
7
8
9
11
10
12
30
Temperature (ºC)
1.
step
Capacitor step not
activated
Capacitor step
activated (
blue
)
1
R
S
T
Step Indicator
The powers and the phases they are belonging to are
not yet informed
A step indicator made by symbols that can be easily realized by the user, is located on the upper
part of the screen of VARkombi-12-PC-TFT-OG. No matter which part of the user in, this panel is
always located on the top of the screen. Step numbers, the phase or the phases they are
connected, whether these are informed or not, whether they are capacitors or reactors, whether
the steps and the generators are activated or not and control panel temperature value can all be
observed on this panel at the same time.
LCD screen is used in VARkombi-12-PC-TFT-OG to provide it to be more easier in use
and be intelligible. In case the keys are not pressed for a long time, the device switch to the
screen saver mode to extend the life of the display, and only the step indicator shown on the the
top scrolls down step by step from the top to the bottom of the screen. Thus, the condition of the
steps can be continued to be monitored. In case of pressing on any key, the main screen image
appears again.
Compensation normal
Fast mode activated
The following symbols can be seen on this part of the
display.
Manual control
3
!
H
F
I V
I V
I V
I V
Measurement:
Current from
medium voltage side – voltage from
low voltage side(non-insulated)
I V
Measurement:
Current from
medium voltage side – voltage from
medium voltage side
Measurement:
Current from low
voltage side – voltage from low
voltage side (insulated)
Measurement:
Current from low
voltage side – voltage from low
voltage side (non-insulated)
