Re: [TCML] BPS Testing

[FutureT@xxxxxxx]

In a message dated 3/12/2008 9:26:08 P.M. US Eastern Standard Time,  
bartb@xxxxxxxxxxxxxxxx writes:

>Hi John,

>I agree, if only 3 laminations then this makes  only slight difference. I 
>think the fact that the NST's get warm at  140Vac is showing that the 
>transformers are likely saturating. But  this of course would have to 
>measured against a normal input voltage  temperature. What is strange, is 
>how saturation affects the current  available for cap charging. This is 
>the key. If we run our NST's into  saturation for low duty cycles, it may 
>be a big plus for getting a lot  of current our of a little transformer 
>which would increase  bps.


Bart
 
Yes, it seems that when the NST's saturate, the shunts become
less effective (?), and permit more current to flow.  There may  be
a non-linear aspect to this also.  
 
>I'll measure power this weekend when I run the bps testing. I'll  check 
>120V and 140V power draw for the 15/60 Franceformers.
 
Excellent.  
 
Cheers,
John

>Take care,
>Bart








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