Considerations Relating to the Effectiveness of the Float Installed Inside the Conservatory of Oil to Electrical Power Transformers
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2013, Vol 37, Issue 37
Abstract
Protection of the electroinsulating oil against oxidation, constitutes one aspect investigated to increase safety in the operation of the electric power transformers. Oxidation is a chemical reaction between transformer oil and oxygen. This reaction is influenced by: temperature, humidity, catalytic action of metals (especially copper), sunlight (especially ultraviolet radiation), electromagnetic field and products of impregnation incompletely polymerized. From the aspects of safety, continuity of service, and of efficient, lowcost maintenance it is desirable to monitor the condition of the insulating oil by testing and to take remedial measure before the oil reaches a point of determination beyond each failure of equipment can be expected. The condition of the oil and the load conditions should determine whether in annual, biannual or more frequent schedule should be followed. Normally acidity, IFT, power factor and dielectric tests should be done on oil in major electrical equipment at least once a year. The surface of the electro-insulating oil in contact with air was reduced by constructing oil conservatory. Installing of the float inside the conservatory is intended to cover the oil and thus to limit at the maximum the contact with the air. An experimental stand, built in the Laboratory EMAD of the University “Stefan cel Mare” of Suceava, is presented in this.
Authors and Affiliations
Tiberiu-Octavian Cujba
Keywords
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