Gas generation and its relation to the dielectric strength of oil

Studies have been made of transformers and similar equipment in which various faults have been associated with the formulation of combustible gases(1). It has been shown there are many reasons for the formation of combustible gases(2), but not all of the causes are necessarily faults. As more and more emphasis is placed on preventative maintenance of electrical equipment, the need for a thorough understanding of the causes of the gases and their relationship to trouble free operation is necessary. The analysis of the data from a transformer, indicating the presence of combustible gases, must be thorough enough to enable an operator to classify those units with possible faults and those that have combustible gases as a result of contamination from other sources.