Bergey or Whisper [RE-wrenches]

[Ian Woofenden, Home Power]

<x-flowed>

Hi Hugh,

I'm still wondering why this is such a common myth.

Care to explain why you keep having to counter this myth? And can you 
more fully explain what you say below?

Ian


>>  it's dc transmission to the controls. Wire will have to be
>>sized accordingly larger compared to the 3-phase ac of the Whisper.
>
>the idea that the wire loss is greater with dc than with 3 phase ac 
>is a very common fallacy. the rms current in each wire is about 0.8 
>times the dc current.
>
>3 phase ac is only advantageous where the line voltage becomes 
>greater than the end user voltage.  this is not the case with 3 
>phase supplies to rectifiers.
>
>dc is actually slightly more copper-efficient than 3 phase ac.  each 
>wire may need to be slightly larger, but overall you save copper 
>because you only use 2 wires.
>--
>Hugh
>
>down in Birmingham for a seminar about alternators.
>http://www.scoraigwind.co.uk
>
>- - - -
>To send a message: RE-wrenches at topica.com
>
>Archive of previous messages: http://www.topica.com/lists/RE-wrenches/
>
>List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm
>
>Check out participant bios: www.mrsharkey.com/wrenches/index.html
>
>Hosted by Home Power magazine
>
>Moderator: michael.welch at homepower.com
>

-- 
Ian Woofenden <ian.woofenden at homepower.com>
Associate Editor, Home Power magazine
Editors are Professional Idiots - We misunderstand text so our readers won't.

HP subscriptions: $22.50 per year
PO Box 520, Ashland, OR 97520 USA
800-707-6585 (US), 530-475-0830
Or download current issue at <http://www.homepower.com>

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com

==^================================================================
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email To: RE-wrenches-unsubscribe at topica.com
This email was sent to: michael.welch at homepower.com

T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================

</x-flowed>