Spehro Pefhany wrote:

> Another tack is to apply a load, allow some hours for the transformer
> to heat up thoroughly, then disconnect it (!) and measure the winding
> resistance. Compare with the winding resistance cold. The resistance
> will increase by about 3850 ppm/K. Solve for average temperature of
> the winding.

Ingeniuous - I wouldn't have thought of that.

-- 
Martin K
http://wwia.org/sgroup/biofuel/
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