What the capacitor Current formula?, For 1 KVAr how amps its required? fo

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Question

What the capacitor Current formula?, For 1 KVAr how amps 
its required? for using the KVAr for boosting the PF Design 
Calculation.( Eg: for 30 KVAr required how many KW?)

Question Submitted By :: Pasuvaraj

I also faced this Question!!

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Answer Posted By

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 1

As per my knowledge,
On my site bellow capacitor bank I am using.
I have 350 Kvar capacitor bank in this bank 25 kvar
capacitors are placed.

Capacitor specification

Volt = 440
Kvar = 25
Three Phase

KVA
I = ----------
Volt *1.732

25000
I = ----------
440 *1.732

I = 32.80 Amps

Eg 30 Kvar

KVA
I = ----------
Volt *1.732

30000
I = ----------
440 *1.732

I = 39.36 Amps

Is This Answer Correct ?

180 Yes

80 No

Shri..

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 2

You explained the answer in KVA? where do get the kva from
this variables, the formula for capacitor in KVAr, KVAr
into KW, KVA & Amps

Is This Answer Correct ?

56 Yes

15 No

Pasuvaraj

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 3

For correcting PF KVAr is introduced, thus formula

pf=cos A is significant

there you should have a desired PF. If for example you need
a power factor of .90 to maintain for a 30kVAR the watts
that would come will be:

A=arccos .90
A= 25.84

WATTs= KVAR/tan 25.84

= 62500 watts approx.

remember that for PF correnction it is the KVAR that is in
need of computation and not the watts so the question would
rather be, how much capacitor kVAR you need to correct the
power factor.

Is This Answer Correct ?

29 Yes

15 No

Arnie

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 4

VOLT = 400
KVAr = 30
PHASE = 3

I = KVAr
-----
400 x 1.732
=43amps.
Kw = I x 0.624
= 26.8KW.

Is This Answer Correct ?

30 Yes

20 No

Jose

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 5

The question requires more details.
First the "K" represents kilo or 1000.
The real power (kW) can be thought of as the x-axis and the
reactive power (kVar) from inductance or capacitance can be
thought of as the y-axis. The hypotenuse is the
Apparent power (KVA). The relationship of Real to apparent
power gives the Power Factor, where a power factor of 1.0
simply means that you only have real power, no reactive
power. The leading and lagging VARs from capacitance and
inductance, respectively can be added numerically since
they are on the same axis.
To ask, how muck kVars are required for a given kW doesn’t
make a lot of sense because you need to include the desired
power factor.

Is This Answer Correct ?

18 Yes

5 No

Harry

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 6

Its 1.3A/KVAR

Is This Answer Correct ?

21 Yes

9 No

Utkarsh

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 7

Kvar= 1.73*V*I*Sin$ ($ IS INSTESD OF PHASE ANGLE PHI)

so I= kVAR/1.73*V*SIN$

IN A PURELY CAPACITIVE CIRCUIT $ IS 90 DEGREE
SO TERM SIN 90 = 1
HENCE WE CAN CALCULATE CAPACITOR CURRENT BY kVAR/1.73*V

Is This Answer Correct ?

33 Yes

5 No

Prakesh

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 8

Ic=IsinQ1-I'sinQ2
where Q1 = phi1 and Q2 = phi
I is the curent, before correction and I' is the current,
after correction.
Ic is the subject of formula.

Is This Answer Correct ?

1 Yes

3 No

Botsar Joseph Antony

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 9

** Capacitor Current formula is

I= kVAr/kV/1.732 ( for 3 ph capacitor )

**for 1 kVar capacitor... suppose voltage is 440 volts than,

I=1/0.440/1.732
I=1.31 Amps.

For all your information,generally 1 kVAr capacitor takes
0.5 watts...henceforth..

30 kvar capacitor required kw=30X0.5=15 watts and is 0.015kw

thanks!!!!!!!

Is This Answer Correct ?

5 Yes

3 No

9561354591

Re: What the capacitor Current formula?, For 1 KVAr how amps its required? for using the KVAr for boosting the PF Design Calculation.( Eg: for 30 KVAr required how many KW?)

Answer
# 10

normally Formula
Kvar= 1.732*V*I*Sin(pi)
If Pure Capacitor 90 Leads so The power factor is Unity(1)
Assume *V=415
*Sin(90)=1(But Reactive power is zero)
since I=Kvar/1.732*V*1 Eg. 1000/1.732*415*1=1.39A
other formula for Determine KW=KVAR/tan(pi)or KW=VIcos(PI)
Assume * cos(0.9)
since KW=KVAR/tan....Equ 1, take the cos invesr is equal to (0.9)=25.8419 ...Equ 2
KW=30KVAR/tan25.8419=61.94KW OR
they are more formulas
* KW=KVAR/tan(pi)
* Kw=KVA*cos(pi)
* Kw=SQroot(KVAZ^2-(KVAr)^2

Is This Answer Correct ?

1 Yes

3 No

Venkatesh O

12 >>

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