Posted by nicksanspam on May 11, 2008, 7:51 am
>One walk-in-off-the-street price for 6-3 outdoor wire comes to about $3.50 /
>ft. Say 1500 feet, you're talking over $5000.
How much for a couple of used 3 kVA 240-480V transformers and skinnier wire?
Nick
Posted by HeyBub on May 11, 2008, 12:30 pm
nicksanspam@ece.villanova.edu wrote:
>> One walk-in-off-the-street price for 6-3 outdoor wire comes to about
>> $3.50 / ft. Say 1500 feet, you're talking over $5000.
> How much for a couple of used 3 kVA 240-480V transformers and
> skinnier wire?
Dunno. Say half price ($2500). A propane-powered generator is less than
$1000.
e.g.:
http://cgi.ebay.com/3000-WATT-PROPANE-POWER-GENERATOR-EPA-APPROVED-WARRANTY_W0QQitemZ260238859884QQihZ016QQcategoryZ106437QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Posted by David Nebenzahl on May 11, 2008, 5:14 pm
On 5/11/2008 4:51 AM nicksanspam@ece.villanova.edu spake thus:
>
>>One walk-in-off-the-street price for 6-3 outdoor wire comes to about $3.50 /
>>ft. Say 1500 feet, you're talking over $5000.
>
> How much for a couple of used 3 kVA 240-480V transformers and skinnier wire?
Interesting idea (and I see someone gave some ballpark figures down yonder).
I'm wondering about losses: how much power would be lost in that pair of
xformers?
In case anyone's wondering why in the world one would want to do this,
it's because the higher the voltage, the skinnier the wire needed to
carry the same (power) load (think high-voltage transmission lines),
with smaller losses due to resistance.
--
The best argument against democracy is a five-minute
conversation with the average voter.
- Attributed to Winston Churchill
Posted by hallerb@aol.com on May 11, 2008, 5:35 pm
> On 5/11/2008 4:51 AM nicksans...@ece.villanova.edu spake thus:
> >>One walk-in-off-the-street price for 6-3 outdoor wire comes to about $3.50 /
> >>ft. Say 1500 feet, you're talking over $5000.
> > How much for a couple of used 3 kVA 240-480V transformers and skinnier wire?
> Interesting idea (and I see someone gave some ballpark figures down yonder).
> I'm wondering about losses: how much power would be lost in that pair of
> xformers?
> In case anyone's wondering why in the world one would want to do this,
> it's because the higher the voltage, the skinnier the wire needed to
> carry the same (power) load (think high-voltage transmission lines),
> with smaller losses due to resistance.
transformers are pretty efficent, otherwise power companies wouldnt
use them. I will ask a buddy of mine who used to work for allis
chalmers in the 60s, he was a design engineer for power company
transformers. given their long life many he designed are likely still
in use today.
Posted by Ralph Mowery on May 11, 2008, 6:47 pm
> On 5/11/2008 4:51 AM nicksanspam@ece.villanova.edu spake thus:
>>
>>>One walk-in-off-the-street price for 6-3 outdoor wire comes to about
>>>$3.50 / ft. Say 1500 feet, you're talking over $5000.
>>
>> How much for a couple of used 3 kVA 240-480V transformers and skinnier
>> wire?
> Interesting idea (and I see someone gave some ballpark figures down
> yonder).
> I'm wondering about losses: how much power would be lost in that pair of
> xformers?
Most transformers do not have very much power loss. They can be around 98%
efficent for well designed ones to 80 % for small not so well designed ones.
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>ft. Say 1500 feet, you're talking over $5000.