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
9255 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

what are smoke detectors ?

4 Answers Indian Military Services,

HI, I want to buy a new Xformer to my plant. what are the main parameter should I check ( Xformer rating is 16 MVA)

2 Answers

WHAT HAPPEN WHEN CT SECONDARY OPEN DURING LOAD

16 Answers Neco,

A well system is when , no. of bus bar is less or more. Tell me the concept of it.

0 Answers

Why capacitor is blow when I am starting motor ?

1 Answers

Either It Possible a dc Motor to Run On Ac Drive [ Ex : ACS 800 , Yaskawa F7 ] If it is Possible How Pls Inform Me dinesh_elect_eng@yahoo.com

0 Answers

in a delta-star with neutral grounding on star side what will happen if one star limb got opened at star point

1 Answers NTPC,

what is our body resistance value?

11 Answers Bhel,

what is pulverisation

2 Answers

What is the meaning of In,Io & Ir in Circuit breaker? How to calculate?

1 Answers

What is the function of earthfault relay?

18 Answers MultiTech, Tech Mahindra,

is it true there's a big difference in using Cummins or Denyo...especially power output or leakage

0 Answers

For more Electrical Engineering Interview Questions Click Here