Hi,

I wasnt particularly clear. These results are from an oil sample from the bottom tap. The resistivity line is:

Resistivity (giga ohm.m @20 degrees C) 1100.10 - acceptable range 4-60.

and it just sais considerable fibre content. The transformer is loaded about 1000-1200A per phase 12hours /day and 800A remainder.

There were no insulation resistance readings taken at the transformer. It is sited outside in a cage, it does get nice and warm, my guess would be about 50C when fully loaded ambient 19C. We dont have Buchholtz protection. When he took the sample, he left with 2 bottles and replaced the breather.

Thanks

Last edited by johno12345; 04/19/07 07:52 AM.
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