[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [TCML] 35 KVA Vacuum Tube Tesla Coil
PF issues aside, I would imagine the transformer core to be totally
saturated and most likely the ballast as well, unless it possess a very
substantial core size. The trouble then is that the sine wave loses it's
shape and the meter, depending on the sort used, will give differing false
results.
Therefore, your coil is actually more impressive than what you though for
the power Roger!
Regards
Phil Tuck
www.hvtesla.com
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of David Rieben
Sent: 07 July 2011 01:36
To: Tesla Coil Mailing List
Subject: Re: [TCML] 35 KVA Vacuum Tube Tesla Coil
Hi Roger,
First of all, kudos on a very impressive VTTC. ;^))
As for the 170 amps @ 230 volts, I tend to agree with Phil, in that maybe
you ammeter and PF issues could be distorting your readings. If you are
actually drawing THAT much power, I'd hate to be your neighbor(s) who shares
your distribution transformer, as that would almost certainly cause a
noticable dimming of the their lights, unless it is also a very "stiff"
transformer ;^) My local electrical utility sometimes places two average
sized residential homes on a single 15 kVA transformer but usually upgrades
to a 25 kVA unit for two and almost certainly for a third customer hookup.
Most subdivisions will have about 5 or 6 customers to a 50 kVA unit. I do
realize that the "nameplate" rating of distribution transfor- mers is at
100% duty cycle, with a 65*C temperature rise, so they can certainly
momentarily put out several times their rating.
Now that it's summer here in the south, central AC units, which are very
power hungry, run almost round the clock, so the service trans- former has
additional loading on it from every customer who happens to like his or her
house cooler than 95*F inside, in addition to notably higher ambient
temperatures to operate in.
I would have to think that a little 5 kVA unit must be really straining to
put out 35 kVA, though ;^0
David
----- Original Message -----
From: "Phil Tuck" <phil@xxxxxxxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Wednesday, July 06, 2011 8:22 AM
Subject: RE: [TCML] 35 KVA Vacuum Tube Tesla Coil
> Roger wrote>>
> "I found it hard to believe myself but I'm pulling 170 amps at 230 Volts.
> After a few runs the transformer gets warm but not smoking hot."
>
>
> "Smoking" is the word I was thinking of actually. In the video at around 2
> minutes in where you focus on the transformer, the tranny's input lead
> coming in from the right hand side looks like ordinary flex (13 / 15 amp)
> I
> would have thought that 170 amps would melt the insulation as quick as you
> could look at it. Maybe your ammeter and PF issues are distorting things?
> It
> has to be good news for you though if that's the case.
> Regards
> Phil Tuck
>
> www.hvtesla.com
>
>
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Roger Smith
> Sent: 06 July 2011 10:42
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] 35 KVA Vacuum Tube Tesla Coil
>
> On 7/5/2011 3:50 AM, Phil Tuck wrote:
>> Roger,
>> It's a change to see a nice sized discharge from a valve coil, but I
>> have just realised that you said 35 kvA and not 3 and a half kvA! That
>> means you are pushing the tranny by a factor of 7. Is this the reason
>> you kept the run-time relatively short, or is that for the valve's sake?
>> The actual physical size of the tranny looks relatively small against
>> my own 5kVA core (which is 16 inches high and weighs 90 pounds) and I
>> am surprised the core cross section isn't completely saturated.
>> The fact it is out of its oil as well (mainly for cooling rather than
>> insulation in this instance) certainly makes it a well-built tranny to
>> my mind.
>>
>> Regards
>> Phil Tuck
>>
>> www.hvtesla.com
>>
>>
>>
>> -----Original Message-----
>> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
>> Behalf Of Roger Smith
>> Sent: 04 July 2011 10:46
>> To: Tesla Coil Mailing List
>> Subject: [TCML] 35 KVA Vacuum Tube Tesla Coil
>>
>> I got a hold of a big ceramic triode (3cx10000a3) a few years
>> ago and I finally built a tube coil with it. It is powered by a 5 KVA
>> pole transformer at up to 35 KVA and I am now getting 50" fat bushy
> sparks.
>> Here is a link to the video on it
>> http://www.youtube.com/watch?v=B8536fYHvGM&feature=feedlik
>> <http://www.youtube.com/watch?v=B8536fYHvGM&feature=feedlik> I
>> haven't seen any other VTTCs like it so It's hard for me jug the
>> efficiency of it. Any suggestions are welcome.
>>
>> Roger
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>>
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>>
> Hi Phil , I found it hard to believe myself but I'm pulling 170 amps
> at 230 Volts. After a few runs the transformer gets warm but not
> smoking hot.
>
> Roger
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla