Answer / sai

we can use the Requird rated capacitors while we can
mainten the pf

Answer / abdul wajid

Power factor in industries can be improved by using
capacitor banks

Answer / pillay

The PF is low because of inductive load. You can improve IT by adding capacitive load. Luckily cap load is loss free.That means you dont pay kwh for it but you must buy and maintain the capacitor and on and off it as necessary at the right amount.
One way to know how much you need, is you must know the load in KW and the pf.
assuming the load is 500 kw and the PF is 0.6 and you want to improve it to 0.95. you can find out the kva demands at this two pf levels
500/0.6=833kva . 500/0.95=526 kva, 833 kva -526kva =307kva

If you add 307kvar into the system in paralel you would improve the pf to 0.95 you can divide this into 8 steps of 40 KVAR each connected accros the 3 phases through an auto PF regulator.Your cap on each step will be rated as 40 kvar at 415 volts (rated voltage) 3 PHASE.

I welcome any improvements or comment about this.

Answer / amit biswas

inddustries mostly use static variable compensation (SVC)
technique for pf improvment.

Nowwhy dose pf drops? Due to inductive loads(eg.due to
arcing furnaces)

what SVC scheme dose is it proptionatly increases
captcitacne with inc. inductance or vice versa.

also using syc. motors can improve pf
(remember sync. motor is also called sync. condensor)

Answer / edy

Let say the load 500kw and u wanna increase ur power factor
from 0.6 to 0.95

500 (Tan 1-Tan 2)-u can use complex calculator to convert
from cos to tan
500 (1.33-0.32)
505kvar

u can set it with 6 step
505/6
84kvar and make it 80kvar each step

What is the resistance of the field winding of a d.c. Shunt generator kept low?

0 Answers  

What is meant by power factor correction?

5 Answers   Aspire,

what is the difference between surge arrestor and surge supressor

1 Answers  

how to test power transformer.YNd11

0 Answers  

10 hp motor ,7.5 kw ,960 rpm, full load current 15.5, delta connection so how much take current no load trial time. any formula please give..... second question :- what is different between brekar control wiring and motor starter control wiring

1 Answers   MSP,

What is diference between ELCB & ELMCB?Also how its application for use in design area?

2 Answers  

Why is water motor not taking the pressure? what is the problem?

0 Answers  

A circuit breaker on detecting fault will a. Open b. Close c. Open and trigger the alarm

2 Answers  

Why motor is not calculated in kva, whereas transormers are calculated in kva

2 Answers  

what is the abbreviation for F.M In FM-200 fire suppression system

1 Answers  

what is the relation between the leading pf and supply voltage?

1 Answers  

What is the approximate percentage of Si content in transformer core(CRGO-Cold Rolled Grain Oriented)? Why it is kept so low?

1 Answers