Even more - I have 3 transformers hung on the 5200 volt bus. The 48 VDC
battery has a capacity of 1760 AH, so just the transformers alone would
discharge the battery in a month. Of course the 6.6 kW solar array would do
a recharge long before that. I sized the plant to go 5 days with nominal
loads with minimal solar charging in the span. With the early rain this
season, I haven't had a full charge in over a week. I have a 20 kW diesel
generator to charge the battery if this cloudy weather sticks around much
longer.
The whole still evolving project was documented here:
http://w6dsr.com/solarPlant/index.html
73,
-Doug W6DSR
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Steve Wright
Sent: Saturday, October 29, 2016 11:23 AM
To: amps@contesting.com
Subject: Re: [Amps] 3 phase HV transformers on single phase
On 29/10/16 10:50, "Doug Ronald" <doug@dougronald.com> wrote:
> [....] I use Collins 208U-10 plate/screen transformers which look very
> similar to your images, to boost my single phase 240 VAC 60 Hz up to
> 5200 VAC for transmission from my solar plant to my ranch house, and
> another run to my shack. The ranch house is about 1/3 mile from the
> solar plant, and the shack about 800 feet from the solar plant. These
> Collins transformers are really high quality with ratings from 49 Hz
> through
> 440 Hz. I see only a 40 Watt loss in each transformer due to I^2R and
> magnetic effects. One thing to be sure of is to short-out all the
> windings on the unused leg to prevent the magnetic flux from taking
> that easy path around the loop. I wouldn't depend on the shorted turn
> alone to redirect the flux.
How BIG is your solar plant??
80 watts loss 24/7 would need AT LEAST A KILOWATT of solar just to keep the
battery bank up!!!
Steve
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