Calculating Total amps across 3 phase using 4 2 phase loads

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Smart $

Esteemed Member
Location
Ohio
Hmmm

See if this works
Only 124×280 pixels. I have to assume the server programming is downsizing your image.

Better to use another service (Photobucket, Google Drive, etc.) and link the image into your post.

In the meantime, here is my calc's using actual wattage...
Calc%20for%20174940.png
 

Ingenieur

Senior Member
Location
Earth
Only 124×280 pixels. I have to assume the server programming is downsizing your image.

Better to use another service (Photobucket, Google Drive, etc.) and link the image into your post.

In the meantime, here is my calc's using actual wattage...
Calc%20for%20174940.png


Got mine to post
there are 8 1000 W heaters
4 a-b
2 b-c
2 c-a

run it with those numbers
it looks like we may match

phase angles for
Iab
Iac
Ica
should be 120 apart since in pararllel with each ph V?
 

Smart $

Esteemed Member
Location
Ohio
I had the sign wrong for Ibc
and a math error I think

a 25.4 ang 19
b 25.4 ang 161
c 16.66 ang -90
Looks good. The discrepancy between your angles and mine is you are using VAC (VA to some) as 0° reference and reverse angle convention (i.e. clockwise instead of counterclockwise). You'll see what I mean if you take your angles, shift 30 degrees counterclockwise then reverse sign.
 

tomito

Member
Location
Mexico
Do not sum currents, sum loads.
A B C
1,000 1,000
1,000 1,000
1,000 1,000
1,000 1,000

3,000/120 = 25 A
2,000/120 = 16.66 A
accurate enough

Tom
 

GoldDigger

Moderator
Staff member
Location
Placerville, CA, USA
Occupation
Retired PV System Designer
tomito:
If you need to format a table like that one, you cannot just use spaces or tabs unless you put the whole table text inside a "CODE" section. Use the "#" formatting button.

Code:
  A       B       C
1000    1000
        1000   1000 
1000           1000

Not perfect, but a lot more readable. :)
 

tomito

Member
Location
Mexico
tomito:
If you need to format a table like that one, you cannot just use spaces or tabs unless you put the whole table text inside a "CODE" section. Use the "#" formatting button.

Code:
  A       B       C
1000    1000
        1000   1000 
1000           1000

Not perfect, but a lot more readable. :)

Thanks! this is what I meant to post:

Code:
    A       B      C
  1000    1000
  1000           1000 
          1000   1000
  1000    1000
so...
Phase A = 25 A
Phase B = 25 A
Phase C = 16.66 A
 
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