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balanced power

Hi, could anyone explain to me in short what balanced power means? This is a term that is applied to isolation transformers. I'm using isolation transformers too (I live btw in The Netherlands) but I'm not using ground. Is that what "balanced" means: using a ground? What are the benefits and drawback of balanced power? Thank you in advance.

Chris
dazzdax

Showing 2 responses by dazzdax

dazzdax OP
599 posts
 
I'm sorry guys, despite your clear explanation I still don't understand how the concept of balanced power can be put into practice: is it always necessary to use a step down trannie with dual cores? So for balanced power a neutral conductor is not necessary? I don't understand it. This is apparently to difficult for me. I thought in the US mains voltage is 120V, so what does 240V to do with US mains voltage?
dazzdax OP
599 posts
 
In the schemes I've seen at the Equi=tech website I encounter one stable element and that is: ground. So for a proper balanced power a ground is necessary. What to do without a ground? Then balanced power (and common mode rejection) is not possible? I don't understand it completely. It is also confusing when you read that the Wavac isolation transformer (made by Denken Seiki of Japan) doesn't need ground to achieve full "common mode rejection". How could this be possible? Once more: it is confusing!

Chris
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