Power Factor.

calculate the PF in live state and find the reactive power required for LV side.

You should work out the load factors, diversity factors and the inductive reactance of the transmission line, capacitor assessment is secondary to these.

you have to know the exsisting power factor , let us say it is :

cosΦ1

then you have to decide to which power factor you want to improve your system?

let us say cosΦ2 then the required capacitor measure in Kvar is :

Q= P (tanΦ1-tanΦ2) where :

P is the active power and P=sqr root 3*VIcosΦ1

hope it works.

Call a good contractor and record the variation of pf,harmonics,voltage,current,watts,Var etc for a 24hr period and give a contract to a Capacitor bank manufacturer. Alternatively you may install cap banks for each feeder

We are contractors and I am assigned for this job. please help me. Otherwise I will be out from job

Regards

Noorirm

Give a sub contract

So the firm has sold something that it cannot supply? Outrageous! It sounds like everyone needs to be out of a job!

generally speaking...use the over all power factor of the system..not based on individual loads but of the sending end side...employ power factor correction by the use of your capacitor banks...this time instead of using a huge/bulk capacitor employ the much lower kvar ratings..this is to allow you to choose the range of your pf correction by simply the employment of switching mechanism..afterall, a waste KVAR is still a load loss..

1. We must get on the right path!!
2. What do you expect the capacitors to do??
3. I can think of two purposes for capacitors, power factor correction and as part of voltage surge arrestors. Is it either of those? Power factor correction is usually the consumer's problem.
4. Who thinks capacitors are needed, is he technical? Did he give a purpose for them?