Kayos
Gone......
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Oh go on. Please explain how a rubber insulator could act as a conductor I never did understand that bit. Perhaps it was impregnated with some left over magic lead from the tank inserts.
Sorry, should have made my sarcasm clearer





, but heavy industry, a regular occurance.... we had it done yearly on MW capacity centrifugal / screw chillers by the manufacturer, who analysed the results and advised what (if any) action needs to be taken. Done a lot on expensive / rotating machinery, big engines, compressors, turbines,etc. The experts can predict a lot from reading the oil samples, and the associated compositions, gives fairly reliable advanced warnings of wear related failures, especially tied into vibration analysis, which is an art in itself.