0
Most of the time a load is inductive. A capacitor counters this effect by making the voltage and current more in phase (so there is greater real power, P=VI*cos(angle)).
If the load were to be capacitive in nature, then an inductor would be used in parallel to the load to counter the effects of the capacitors.
What else can I help you with?
How do you connect the capacitor bank in electrical system?
improvement of power factor
How do you install capacitor bank?
It depends what it's for. If it's for power-factor improvement, then it is normally connected in parallel with the load.
What is characteristic of power factor in capacitor?
Power factor characteristic in a capacitor is a measurement of how efficiently a capacitor uses electrical energy.
What are the importance of capacitor?
It depends on the purpose where you are using the Capacitor.If you are using in power systems then it may be used for improvement of Power factor.Which is the important factor in industry.
How can be determined the rating of capacitor bank?
If you are talking about a capacitor bank used for power-factor improvement, then it is rated in reactive volt amperes (var). Otherwise, it is rated in farads (F).
Can the capacitor be inserted in series in order to improve the power factor?
In a circut we use capacitor in series for improving power factor
Is a power factor capacitor different from a regular capacitor?
A power factor capacitor is a power capacitor. I'm not sure what you mean by "regular". There are different types, made from different materials that have better/worse characteristics than others depending on the application. You could use any high power capacitor for power factor correction, as long as it is sized correctly for the load and voltage.
What is the effect on the supply current if the capacitor removed?
It depends on how the capacitor is connected and whether the supply voltage is a.c. or d.c. Assuming you are talking about a power-factor improvement capacitor (connected in parallel with an inductive load, supplied with a.c.), then the supply current will reduce.
How do you hook up capacitors for power factor correction?
The voltage across a purely inductive load leads the current by 90 degrees.Because of this 90 degree offset the power transfer is inefficient because the current and voltage peaks are never aligned.P = I * ETherefore a capacitor with an reactance equivalent in magnitude but opposite in polarity to that of the inductive load at the operating frequency can be placed in parallel with the load to maximize power transfer.CommentPower-factor improvement does not improve, or increase the efficiency of, power transfer. The power of a load is exactly the same after power-factor improvement as it was before power-factor improvement. All that power-factor improvement does is to reduce the amount of load current.
Do capacitor devices actually save power?
Your question should read, "Do capacitive devices actually save energy?" Power is simply the rate at which you use energy, so you cannot 'save' power. And the answer to your question is no.Capacitor banks are used to improve the power factor of industrial loads. Power-factor improvement acts to reduce the load current, thus reducing the amount of copper required in the supply system conductors, transformers, etc. Power-factor improvement, on the other hand, has no effect upon the operation of the load. The energy used by the load after power-factor improvement is exactly the same as it was before.Power-factor improvement only really applies to industrial loads, because utility companies will financially penalise industrial consumers who allow their power factor to fall below an agreed figure. Power-factor improvement will have absolutely no effect whatsoever on residential loads, so companies trying to sell you 'capacitor devices' that promise to 'save you money' are scam merchants!
How do you calculate kvar of capacitor bank if you know only the kw?
Your question is rather vague. Are you asking how do you determine the reactive power of a capacitor bank necessary to improve the power factor of a load (in which case, is it a single-phase or a three-phase load), or are you asking how to convert a capacitor bank's capacitance into reactive power?If the former, then you need to know the reactive power of the load before power factor-improvement, and the resulting reactive power after power-factor improvement, and the difference between these two will tell you how much reactive power you need to add in the form of capacitors.
What is the effect on the supply current if the capacitor is removed?
It depends on how the capacitor is connected and whether the supply voltage is a.c. or d.c. Assuming you are talking about a power-factor improvement capacitor (connected in parallel with an inductive load, supplied with a.c.), then the supply current will reduce.
