[AMPS] Transformers

[Rich Measures]

>
>Rich says:
>
>	>secondary insulation failure
>
>	Interesting. Why should that happen when an arc occurs on the DC
>side? Is it possible that under these extreme conditions, the leakage
>inductance is shocked into a resonant condition providing very high
>voltages?

€ ..... seems reasonable, Peter .  Henry uses a filter capacitor with 
rather low ESR, and no glitch resistor in the hv pos. to limit peak fault 
current.  
>
>> Proving once again that paper is really and truly hygroscopic
>
>Too right, Rich! Possibly yacht varnish might do, 

€  Yacht varnish is good, however, it shrinks when it dries,  leaving 
airways into the transformer windings.  Air brings moisture.  

>but proper potting is likely to be far better. 

€  agreed

>Vacuum impregnation even more so,

€  ditto

-  cheers, Peter.  Florida is a virtual Turkish steam bath.  


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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