VA rating?

Thread Starter

bonjing

Joined Dec 7, 2008
12
hello there...

I am confused again with this power rating'

how to determine the VA rating if the core area is 3.81cm * 3.81cm = 14.5161 sq.cm.
 

mik3

Joined Feb 4, 2008
4,846
Find the maximum flux the core can conduct. Then find the current which will cause that flux and multiply it by the secondary's voltage (approximation).
 

Thread Starter

bonjing

Joined Dec 7, 2008
12
hello,

I got this formula:

VA= (sqrt Power/5.58)2

but the core area should be in sq. inches and I am using a metric system.

Where does 5.58 come from?
 
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