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Re: [TCML] Core size

Jay,
A reasonable approximation for common laminated silicon steel cores is obtained from the following formulas: 

Core cross section area (sq in) = 0.16*(SQRT(VA))

VA Rating = ((Core Cross section area (sq in))/0.16)^2
I have a .PDF spreadsheet with a number of typical values precalculated that I can send you if you want. 

Lemmee know.

Dave

On 4/19/2010 6:58 PM, jhowson4@xxxxxxxxxxx wrote:

Does any one know the equation that tells me the
power rating of a transformer core based on its dimensions and material.

i am trying to figure out the power variac is rated for ...since it is not labeled

i have scoured the internet to no avail...maybe i am just searching using the wrong terms, ...

Thanks in advanced,
John "Jay" Howson IV

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