Today we are going to discuss very important devices called Power Factor correction controllers; what is the need of these devices and how it works that is we are going to speak about.
Our scope will be for the common VarPlus-Logic device that is represented by Schneider.
These types of devices are used to monitor the power consumption of your plant and by its role, it will regulate the steps of your capacitors (automatically) in order to enhance and improve the power factor in your plant.
With the efficient use of this device, the industry can improve the efficiency of the system by reducing losses and reduced apparent power demand charges.
The idea behind the power factor correction by the use of the Capacitors. The capacitors are connected in parallel with the Power-incoming network as shown in the next Figure.
Capacitors contained in most power factor correction equipment draw a current that leads the voltage, thus producing a leading power factor.
If capacitors are connected to a circuit that operates at a nominally lagging power factor, the extent that the circuit lags is reduced proportionately.
The VarPlus controllers are able to control six stages (6L) or twelve stages (12L), which depends on your needs and your device version, the device can be connected to either 220V/400V AC that depends on your selection.
For the next figure, we can see it is a phase to phase connection (480 VAC) the two phases are connected to (U1 . U2).
Note
In case of disconnecting the current transformer (CT) because of rewiring or panel maintenance, you have to ensure that the CT terminals are shorted, because an open circuited CT makes a huge amount of volt across the secondary winding, and that could make a series danger for the Technician that is dealing with.
This device has two modes for commissioning:
You can enter the quick start menu by selecting the 100 sub-menu from the PARAMETER menu.
ON control is in Automatic mode.
OFF control stops and active steps will be disconnected.
Hold control stops and active steps remains in.
Note
You will not find the setting of the cooling fan at the Quick start menu so, if you are using a cooling fan, you have to enter the desired temperature set point on parameter 511.
When the temperature drops under the set point the contact of the fan will be energized to turn the fan ON until it can achieve the set point again.
If you liked this article, then please subscribe to our YouTube Channel for Instrumentation, Electrical, PLC, and SCADA video tutorials.
You can also follow us on Facebook and Twitter to receive daily updates.
Read Next:
In the PLC emergency stop example program, when the emergency button is pressed, the elevator…
This article is about controlling the double-acting pneumatic cylinder movement control with a timer circuit.
In this article, we will review the main responsibility scopes of the instrumentation and electrical…
Learn the daily alarm PLC program using real-time clock instruction as per the required timings…
A Real-Time Clock accurately tracks time from seconds to years and stores the data in…
Omron PLC logic for sorting the number of products and counting the number of products…