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Updated survey of chromatographic analysis of appliance transformers 110kV (AT)
The text deals with diagnostics of oil appliance transformers (AT) by withdrawal of small quantity of oil. Theoretically, the withdrawal of 3ml of oil is enough for chromatographic analysis (DGA), setting the dissolved water content in the insulating oil and neutralization value. In practice, 10ml of oil is withdrawn.
The text also contains a description and graphic presentation of results of chromatographic analysis of most often used types of AT in the Czech Republic in the past. The results are also sorted according to the year of production and according to the number of AT in particular years.
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