Welcome to OnlineConversion.com Forums

 OnlineConversion Forums CAlculating Current in a 3 phase circuit with 6.4KW 400V supply
 [ Home ] [ Forum Home ] Register FAQ Calendar Search Today's Posts Mark Forums Read

 Convert and Calculate Post any conversion related questions and discussions here. If you're having trouble converting something, this is where you should post.* Guest Posting is allowed.

#1
12-07-2007, 01:39 AM
 geraray Guest Posts: n/a
CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

Hello,

Please help how do I calculate Current (Amps) in a 3 phase circuit with 6.4KW 400V supply.

Thanks
Ray
#2
12-07-2007, 08:18 PM
 gubment_cheez Ultimate Supreme Bacon Cheese Member Join Date: Jan 2007 Location: Sac-o-Tomato, Cowafornia Posts: 354 Rep Power: 8
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

for a three phase circuit,
Current (3 phases):
I = P / √3 Vl×cos φ
or
I = P / 3 Vp×cos φ

P = power (watts), I = current (amperes), Vl = line voltage (volts), Vp = phase voltage (volts), φ = power factor angle between voltage and amperage

Translated:
Current = Watts / √3 Line Voltage × cos Power Factor Angle
Or
Current = Watts / 3 Phase Voltage × cos Power Factor Angle

don't ask me what all that greek means, I found it here: http://www.sengpielaudio.com/calculator-ohm.htm
__________________
duct tape
duct tape
it's better than glue
fixes stuff
just like new
keep a roll beneath
#3
07-23-2010, 07:37 AM
 bhujbalshivaji@yahoo.in Guest Posts: n/a
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

Please help how do I calculate Current (Amps) in a 3 phase circuit with 6.4KW 400V supply.

Thanks
Ray[/QUOTE]
#4
07-23-2010, 07:19 PM
 Unregistered Guest Posts: n/a
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

P = V x I x √3
6,400 W (6.4kW) = 400 x I x 1.732
I = 9.2 A
#5
03-12-2011, 11:48 PM
 RAJESH KUMAR Guest Posts: n/a
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

In case of 3 Phase calculation, We can use the formula,

I = W / ROOT-3 x V x PF

ie, W = WATTS, ROOT-3 = 1.732, V = VOLT, PF = 0.83

So,W = 6.4KW = 6400WATTS, V = 400

By Using the above formula,

I = 6400 / 1.732 x 380 x 0.83

= 6400 / 546.272

= 11.71A
#6
03-12-2011, 11:52 PM
 RAJESH KUMAR Guest Posts: n/a
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

In case of 3 Phase calculation, We can use the formula,

I = W / ROOT-3 x V x PF

ie, W = WATTS, ROOT-3 = 1.732, V = VOLT, PF = 0.83

So,W = 6.4KW = 6400WATTS, V = 400

By Using the above formula,

I = 6400 / 1.732 x 380 x 0.83

= 6400 / 546.272

= 11.71A

Email : rajeshkumarbec@yahoo.com
#7
04-01-2012, 03:22 AM
 Unregistered Guest Posts: n/a
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

Quote:
 Originally Posted by RAJESH KUMAR In case of 3 Phase calculation, We can use the formula, I = W / ROOT-3 x V x PF ie, W = WATTS, ROOT-3 = 1.732, V = VOLT, PF = 0.83 So,W = 6.4KW = 6400WATTS, V = 400 By Using the above formula, I = 6400 / 1.732 x 380 x 0.83 = 6400 / 546.272 = 11.71A Email : rajeshkumarbec@yahoo.com
its not 380V for your information, the given voltage is 400V i know what you are trying to say but sorry to say it is 400V.
#8
04-03-2012, 06:54 AM
 Unregistered Guest Posts: n/a
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

For a three phase

P = 1.73 * I * V * p.f

I = P / ( 1.73 * V * p.f)

I = 6400 / ( 1.73 * 400 * 0.8 )

I = 6400 / 553.6

I = 11.56 A
#9
06-23-2012, 11:39 PM
 Navin Guest Posts: n/a
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

as we got I now if we wnt to calculate energy consumption can v use
E=V*I or sqrt3*V*I or sqrt3*V*I cos phy for three phase syatem
#10
08-08-2012, 10:20 PM
 Unregistered Guest Posts: n/a
Re: CAlculating Current in a 3 phase circuit with 6.4KW 400V supply

if Power is given in KW, then we don't need to use Power Factor (PF) because
kW = V x I P.F. x ÷ 1000 and
kVA = kW ÷ P.F. so you can calculate as below.

P= 6.4KW
V= 400V
I= ?
I (Amp) = P*1000/(√3*400) » 6400/(692.8) = 9.23

 Thread Tools Display Modes Linear Mode

 Posting Rules You may post new threads You may post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Main Forums     Convert and Calculate     Resources     General Chat

All times are GMT -8. The time now is 07:59 AM.