how can we calculate that how much capacitor is needed for a system to increas

Categories >> Engineering >> Electrical Engineering
Suggest New Category

how can we calculate that how much capacitor is needed for
a system to increase the pf?

Question Posted / irkanth

5 Answers
9396 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

how can we calculate that how much capacitor is needed for a system to increase the pf?..

Answer / dinesh lokhande

A simple formula will help to co-orelate power factor, KW
load, and Kvar (i.e reactive power) required.

kvar = KW (Tan Qi - Tan Qd) where,

Qi = Cos inverse pfi = Initial power factor angle
Qd = Cos inverse pfd = Final power factor angle

After calculating Kvar we can select no of capacitors
required by looking at capacitor catalog.

Is This Answer Correct ?

5 Yes

0 No

how can we calculate that how much capacitor is needed for a system to increase the pf?..

Answer / iamdon

Before doing mathematical manupulaion,as expaines very well
by our answer poster Dinesh.

Lets understand this simple fact that the power factor
changes due to the variation in Reactive power only.With
the help of power factor, one can easily calculate Reactive
power(Q=P*tan(arc cos pf)). The difference between reactive
power at two power factors is supplied by capacitor.

Author :arbelectbit@yahoo.com

Is This Answer Correct ?

4 Yes

0 No

how can we calculate that how much capacitor is needed for a system to increase the pf?..

Answer / wasifkhan2010@yahoo.com

KVAR =KW(tanQ1 - tanQ2)

where

KW= load of installation
tanQ1 = current power factor
tanQ2= target power factor

in thisway we can calculate KVAR of capacitor that how much
KVAR have to be improved.

Is This Answer Correct ?

2 Yes

0 No

how can we calculate that how much capacitor is needed for a system to increase the pf?..

Answer / william lobo

There is even no need to calculate. We have these charts which give the exact kvar required to be installed if we only know the load in KW and present pF and PF required.

Is This Answer Correct ?

0 Yes

0 No

how can we calculate that how much capacitor is needed for a system to increase the pf?..

Answer / k.prakashchandra

You can use the formula KVA^2=KW^2 +KVAR^2

Is This Answer Correct ?

1 Yes

3 No

Post New Answer

More Electrical Engineering Interview Questions

how the inner and outer body is separated in aircrafts?

0 Answers

what will happen if secondary of potential transformer (220kv/110volt) of any metering core or protection core (cables) of any phase got earthed??

1 Answers

The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason

0 Answers

why using in cable mm square which is mm & which is square why using mm & square.

1 Answers Airtel,

Explain Circuit Breaker Trip Characteristics in detail.

0 Answers L&T,

hi there i am highly enthusiastic about discussing electrical concepts , and hence i wud lyk to invit al do intrested to join me at gtalk and hav a dscussun of the concepts , ad me as a freind . my email id is rakesh.2k99@gmail.com

0 Answers

what is the full form of ka (100A mccb KA)

1 Answers

If we have two nodes A and B and Vab is the potential difference between these nodes then which node is called reference node a.node A b.node B c. Ground node

1 Answers

What is the actual calculation for transformer short circuit test?.

0 Answers

what is first pole to clear factor

1 Answers

Elaborate the term "rotating magnetic field"

2 Answers APTransco,

What are the different sizes of cables for H.T and L.T side of supply?

7 Answers Bhel, BSES, Karthik Industries, Lanco, Nedco, Shilpa Electrical Engineers, TATA, Torrent Power,

For more Electrical Engineering Interview Questions Click Here