On Thu, 2011-10-06 at 19:07 +0000, Virgo Pärna wrote:
> On Fri, 7 Oct 2011 02:12:53 +1300, Chris Bannister 
> <mockingb...@earthlight.co.nz> wrote:
> >
> > Not sure I understand what you are saying. Unless the wrong terms are
> > being used, but transformers "hate" DC. Plus also, think of voltage like
> >
> 
>     I ment the voltage drop on the long lines. And that there was no device 
> like 
> transformer for DC. Thanks the existance of transformers AC could be easily 
> converted 
> to higher and lower voltages - shich ment, that long distance transmissions 
> could be at 
> high voltage and converted to lower voltage near the consumer. And that was 
> one of 
> the main reasons, why AC one out. 
>     Nowadays DC current is actualy used for long distance high voltage power 
> transmissions
> (because of lower losses). But it's my understanding that the voltage 
> conversion is still
> not as easy and simple, as it is with AC.

As far as I know, all you've written is a fact. Around me only AC is
common, there seems to be no DC grid in the Ruhrgebiet. One exception,
I'm not sure if DC has less loss. When a friend and I had a Morse
telegraphy line, low voltage, relatively long distance, when we were
kids, it seemed to be that AC was a good choice, but we didn't use DC
and compared it to AC. Hm? Long distance= high voltage, regarding to the
loss. Is there really a difference between AC and DC? I'm an audio
engineer, so I have to deal with AC for speaker cables, AFAIK there's no
choice to use DC ;).


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