Re: Spark lenght.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Kamil Kompa by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tcmail-at-poczta.fm>

My core is EI type core. The middle leg is 38cmxcm both side-legs are 20 cmxcm.
All windihgs are on the middle leg. The core is designed for LV transformer so 
there are not very big windows in the core. I don't know if it is a good
design, 
but my secondary windings are not woung in layers (too much space needed for
isolator), but in separate sections along the core. I mean, there are not
arranged
on oneself  but close by oneself in 10 separate spools. The primary is wound on
other spool arranged close by secondary spools. I also havn't got thick
wire for
primary so it is made of three layers of thin wire wound on oneself in one
spool
and connected in parallel (they have the same number of turns). 
Do You think it's a good solution?    

*********** REPLY SEPARATOR  ***********

On 01-11-12 at 17:19 Tesla list wrote:

>Original poster: "Malcolm Watts by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>
>
>Hi Kamil,
>           What type of core did you use? There must be a significant 
>amount of leakage inductance or your spark test would have been 
>popping fuses.
>
>On 12 Nov 2001, at 11:21, Tesla list wrote:
>
>> Original poster: "Kamil Kompa by way of Terry Fritz <twftesla-at-qwest-dot-net>"
><tcmail-at-poczta.fm>
>> 
>> Hi!
>> 
>> I have wound my own transformer(2000VA), and I think it is about 11kV.
>> I have measured voltage on primary when secondary was connected to 230V,
>> and it was 4.5V.
>> I have also measured spark lenght between two nails and it was about 1,5cm.
>> I have a table
>> with spark lenght depanding on voltage, but only between spherical
>> electrodes (i dont have smooth metal spheres).
>> Can anyone using a 11kV transformer measure spark lenght between two wires
>> (about 1mm diameter)?
>> If it will be also about 1,5cm I will be sure that my transformer is really
>> 11kV. 
>
>Peak output voltage (with no load of any kind connected) will be 
>230V*SQRT(2)*Ns/Np = 16.6kV roughly.
>
>Malcolm




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