[Boatanchors] AmerTran Plate Transformer specs ?

[eldim at att.net]

Hello Chris,
Sounds like you have all well in hand. 
I forgot to mention that the voltage on an unloaded transformer is going to be considerbly higher.
That transformer must weigh quite a bit not to mention the size. I've never studied anything concerning transformer ratings and how they apply to different sections of the transformer.  What I mean is what does the KVA Rating apply to?  The Primary or Secondary.  I would think that it would be most important that the Primary or Input VA is known.  At 2 KVA that would translate to about 17 Amps at secondary full load.  Is their an easy formula for determining secondary current capacity? 
Best Wishes,
Glen Galati, KA7BOJ
Tacoma, WA
eldim at att.net

-------------- Original message from Chris Howard <chris at yipyap.com>: -------------- 


> 
> Thanks! 
> 
> That helped a bunch. 
> 
> I was able to cobble together a 1 volt AC supply using 
> a variac and a 6 volt filament transformer. Hooking that 
> up in different combinations gave me the following outputs 
> 
> in --> out 
> 1 -- 4 --> 62 volts 
> 1 -- 3 --> 69 volts 
> 1 -- 2 --> 72 volts 
> 
> other combinations ( e.g. 2-4) gave very high 
> voltage readings. 
> 
> It sounds exactly like what you described. 
> 
> Chris 
> kc0atc 
> 
> 
> 
> 
> On Sat, Dec 25, 2004 at 05:47:23AM -0800, ELDIM wrote: 
> > Hello Chris, 
> > If the primary has continuity on all terminals with respect to each other 
> > terminal on the primary then you most likely has a tapped primary. I.E. 
> > Term 1 = 0 or Common, Terminal 2 = 105 Volts, Terminal 3 = 115 Volts; 
> > Terminal 4 = 125 Volts. What I would do is take a variac rated at 10 Amps 
> > and place it on the two outside terminals 1 & 4. Connect a high voltage 
> > meter on the secondary. and carefully turn the variac up and observe the HV 
> > indication. If you have voltage then you are in business. Now to determine 
> > if this is a 125 Volt or a 220 Volt version. If it is a 125 volt xfmr, then 
> > for each volt input you you should get about 50 volts output. I.E. 10 volts 
> > on the primary would produce 500 Volts on the secondary. If the 10 volts 
> > produces approx 250 volts then you have a 220 xfmr. Now, if there was no 
> > voltage, then you have a dual primary. You can use term 1&2 or 3&4 for the 
> > test. If you're makinging a HV Supply for a hefty RFAmplfier, and you want 
> > to safely control the output, then you shour use a 20 Amp or higher Variac 
> > to control the HV. MERRY CHRISTMAS. 
> > 
> > 73, 
> > Glen Galati, KA7BOJ 
> > Tacoma, WA 
> > eldim at att.net 
> > 
> > ----- Original Message ----- 
> > From: "Chris Howard" 
> > To: 
> > Sent: Friday, December 24, 2004 7:37 PM 
> > Subject: [Boatanchors] AmerTran Plate Transformer specs ? 
> > 
> > 
> > > 
> > > 
> > > I'm trying to figure out how to wire up this plate 
> > > transformer. The label says: 
> > > 
> > > Plate Transformer 
> > > Spec No. 26579 Ser No 368962 
> > > Sec test 15000V Cyc 60 
> > > 105V Pri Sec 6200V 
> > > type W KVA 2 Phase 1 
> > > 
> > > 
> > > On the side with the label (the 'top') it 
> > > has four insulator/connectors on one end, 
> > > all the same size, arranged in a line. 
> > > On the other end of the top there are three 
> > > insulator/connectors, two large and one 
> > > smaller, arranged in a triangle with the 
> > > smaller in the middle, sort of. 
> > > 
> > > I'm thinking the four-in-a-row is the primary 
> > > side and the three-in-a-triangle is the secondary. 
> > > 
> > > To use this with 110V AC input, will I need to 
> > > put any jumpers on the primary? Which of the four 
> > > do I connect to? 
> > > 
> > > Thanks! 
> > > 
> > > (yes, I tried a ohm meter, but the results really 
> > > didn't clear things up for me. All of the four-in-a-row 
> > > had very small resistance to all others.) 
> > > 
> > > Chris 
> > > kc0atc 
> > > 
> > > -- 
> > > Chris Howard YipYap.Com 
> > > chris at yipyap.com Estes Park, Colorado USA 
> > > current Estes Park weather -- http://www.yipyap.com/wscurrent.html 
> > > _______________________________________________ 
> > > Boatanchors mailing list 
> > > Boatanchors at mailman.qth.net 
> > > http://mailman.qth.net/mailman/listinfo/boatanchors 
> > > ** List Administrator - Duane Fischer, W8DBF/W9WZE ** 
> > > ** For Assistance: dfischer at usol.com ** 
> > > $$ For vintage radio info, see the HCI web site $$ 
> > > http://www.w9wze.org 
> > > 
> 
> -- 
> Chris Howard YipYap.Com 
> chris at yipyap.com Estes Park, Colorado USA 
> current Estes Park weather -- http://www.yipyap.com/wscurrent.html