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Original scientific paper

Significance of CO2/CO ratio in dissolved gas analysis

Mladen Banović ; Transformers Magazine
P Ramachandran ; ABB
Navin Rego ; Kahramaa
Pavel Justiz ; ORGREZ

Full text: english pdf 235 Kb

page 30-34

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According to the literature, the ratio of carbon dioxide and carbon monoxide (CO2/CO) for a transformer with a healthy cellulose insulation system should be between 3 and 11. If results of the dissolved gas analysis (DGA) of oil from transformers in service give the ratio value of CO2/CO less than 3, it means that the cellulose insulation is degrading rapidly. What is the meaning of this ratio if it is high; say greater than 15 or 20?


carbon monoxide, carbon dioxide, ratio, dissolved gas analysis

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