Original scientific paper

CARBON MONOXIDE AND CARBON DIOXIDE IN CLOSED-TYPE POWER TRANSFORMERS

Anđela Hadži-Skerlev ; Končar- Electrical Engineering Institute
Veronika Haramija ; Končar- Electrical Engineering Institute
Dijana Vrsaljko ; Končar- Electrical Engineering Institute
Božena Musulin ; Končar- Electrical Engineering Institute

Abstract

Gases carbon monoxide (CO) and carbon dioxide (CO2) are formed in transformers in larger
quantities as a product of degradation of cellulose, than by oxidation of oil.
In transformers with closed-type breathing system, without any indication of failure or fault, it was
observed that the concentrations of CO are higher than the typical values according to IEC 60599 and
CO2/CO ratios lower than 3 frequently have been found.
This paper presents results of laboratory investigation of some influence parameters on formation
gases CO and CO2.
The typical values for CO as well scheme concerning their ratios need to be revised in standard
IEC 60599. The criteria need to be established separately for closed type transformers.

Keywords

carbon monoxide; carbon dioxide; cellulose; mineral oil

Hrčak ID:

198828

URI

https://hrcak.srce.hr/198828

Publication date:

15.7.2017.

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