Question

. The device used to keep transformer oil from deteriorating is the A. surge diverter. B....

. The device used to keep transformer oil from deteriorating is the A. surge diverter. B. baffle. C. activated alumina filter. D. bimetallic element.

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Answer #1

Transformer oil deterioration is caused by moisture and oxidation. Deterioration is mainly due to contamination, overheating, electrical stress, and oxidation

option:D (BIMETALLIC ELEMENT)

A bimetallic strip is used to convert a temperature change into mechanical displacement. The strip consists of two strips of different metals which expand at different rates as they are heated, usually steel and copper, or in some cases steel and brass. The strips are joined together throughout their length by riveting, brazing or welding. The different expansions force the flat strip to bend one way if heated, and in the opposite direction if cooled below its initial temperature. The metal with the higher coefficient of thermal expansion is on the outer side of the curve when the strip is heated and on the inner side when cooled.

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