Re: 1 KVA 240 v transformer output 6v,8v,12 v AC how to test if it can supply 83 amps?

Hi
well since last time i asked for advice i have had a few
problems...First problem was i had ordered some 400A 30V low Vf
Schottky diode rectifiers i won them on ebay
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=3877178672&ssPageName=STRK:MEWN:IT
....But never got them through the post :( so that delayed me a week or
so..Then i Bought from a Surplus shop 8 x 110 amp Rectifiers..they
were only a about 3$ each ...used but untested..I got them from Cpi
surplus in the USA ..very fast service...Unfortunatley the diodes i
bought were Silicon controlled rectifiers...Which my Radio Ham friend
told me they are no use for what i wanted...So i was realy pissed
off!!...So i decided to spend even more money on another PSU rated at
5 Volts at 325 amps..I won it on ebay a week orso ago..
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=7501227612&ssPageName=STRK:MEWN:IT..

http://www.abex.co.uk/sales/electronic/psu/rack/p10/p_series.pdf

Its made by Power Ten INC.. its a 19 inch rack mounted PSU with
variable Voltage and Current control..First impressions were WOW!!
when i turned it on it sounded like a jet taking of lots of noise from
the internal fans...However my Smile was soon wiped of my face when i
tried to test the power output...

I connected it up to a short length of nicrome wire and set the
voltage to 5 Volts and slowly turned up the current .. all i could get
was 20 amps the wire glowed white hot ..Now i have done this test
before on my old 400watt computer PSU and it went off scale on my 25
amp analoge meter.. and melted the nicrome wire...

I then tried a very crude electrolyisis of my Lead Nitrate solution,
using my old 400 watt PSU i can get 15 amps thru it ..But with this
PSU i only managed a poxy 2 amps... i am now totaly pissed off!!!?

Have i wasted even more money?...How can i test my PSU?.. will it
damage the unit if i make a dead short on the connections.. and slowly
turn up the current ?...The control for the current works by setting a
limit on the power supply...I hope some one can put a smile back on my
face...

Dont forget i want to use the power supply for electrolysing Sodium
Chloride solution..I have read several patents and the cells run at
about 4.75 volts at several hundred amps....

So i assumed that a 5V supply should be able to do the job... I have
got several amp meters to read the current..

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4534893020&sspagename=STRK%3AMEWN%3AIT&rd=1

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=7500828509&ssPageName=STRK:MEWN:IT

But at the moment i have no power supply that can give me the current
i require..

Is the PSU faulty?...or is it something else i am overlooking?..

Hope some one can help ....

Cheers

Rob
.

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