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Re: [TCML] fused Variac



 
 
In a message dated 1/16/09 12:13:14 P.M. Eastern Standard Time,  
sparks@xxxxxxxxxxxxxx writes:

>As long as the voltage between turns is less than the contact  potential,

>relatively little short circuit current will flow between turns  when the
>brush bridges two turns of the winding.  For this reason,  most variable
>transformers tend to have windings with between 1.0 - 1.6  volts per

>turn.


    Thanks, Ralph!
 
    I've always wondered how the "shorted turn" problem  was resolved in 
Variacs.
 
-Phil LaBudde

Center for the Advanced Study of Ballistic  Improbabilities
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