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WHAT IS DGA TEST FOR THE TRANSFORMERS.

Answer Posted / pundlik wanwe

Transformer oil is a mineral oil. It is either parafinic
based or napthaline based. Oil contains the hydrocarbons.
When the oil get heted depending upon the temperature rise
oil gets decomposed and gassed begins to evolve.
To analise the composition of the evolved gasses the method
used is called Dissloved Gas Analysis.
Evolved gasses involves Hydrogen, Carbon monoxide, carbon
dixoide, methane, ethane, ethelyene, acetylene etc.
The samples oil is used to pass through the gas
chromatography where as per the temerature rise gasses
evolved can be seen as a spectrum band.
This method is a nice tool to judge the condition of oil in
transformer subsequentely that of transforrmer winding
insulation.

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