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The Phenomena of Moisture in Transformer Oil
The Phenomena of Moisture in Transformer OilWater in oil appears as an unwanted substance, it is generally accepted that water in microscopic amounts - not gallons- is the cause of more electrical breakdowns than any other impurity. Moisture constitutes a hazard not only to the insulating qualities of ...
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Transformer oil dissolved gas analysis(DGA) - IEC 60599
Transformer oil dissolved gas analysis(DGA) - IEC 60599(1) Electrical discharge - visually detectable faults defined by IEC 60599Partial discharge (PD): Possible X-wax deposition, pin holes or carbonized perforation in paperDischarge of low energy: Large carbonized perforation through paper, carbonization ...
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Chemical reactions of of transformer oil dissolved gas analysis(DGA)
Chemical reactions of of transformer oil dissolved gas analysis(DGA)Decomposition of Oil(1) Hydrogen, Methane, Ethane, Ethylene, Acetylene(2) Mechanism of formation:Scission of C-H bonds: low energy faults such as partial discharge of cold plasma (Corona)Scission of C-C, C=C and C≡C bonds and recombination: ...
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Brief history of transformer oil dissolved gas analysis(DGA)
Brief history of transformer oil dissolved gas analysis(DGA)(1) Late nineteenth century: Mineral oils have been used for electrical insulation and cooling purposes(2) 1928: Attempts to diagnose the type of failure from gases evolved from oil-immersed poweril power transformers started by Buchholtz(3) ...
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Why do we care about transformer oil dissolved gas analysis (DGA)?
Why do we care about transformer oil dissolved gas analysis (DGA)?(1) Incipient faults could exist in power transformers;(2) Early detection of the faults could significantly reduce the cost of repair and loss of servicep;(3) Industry standards do not always give the right answer;(4) Understanding the ...
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The Effect of Moisture on the Breakdown Voltage of Transformer Oil
The Effect of Moisture on the Breakdown Voltage of Transformer OilPower transformers utilize oil as a heat transfer medium and a dielectric material, together with cellulose. Breakdown voltage (dielectric strength) is one of the most important parameters of transformer oil. It is measured when the transformer ...
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Viscosity definitions
Viscosity definitionsViscosityDefinition: A measure of the resistance of flow due to internal friction when one layer of fluid is caused to move in relationship to another layer. The Poise represents absolute viscosity, the tangential force per unit area of either of two horizontal planes at unit distance ...
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Interfacial Tension
Interfacial TensionBy I.A.R. GrayTransformer Chemistry ServicesBackground:The interfacial tension of a mineral oil insulating fluid is related to the deterioration of the sample. The mineral oil insulating fluid is essentially a non-polar saturated hydrocarbon; however, when the sample undergoes oxidative ...
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What is oil filtration?
What is oil filtration?By Dennis MorganThis is a seemingly simple question with seemingly simple answers. The problem however is because so many different products exist in the marketplace, either confusion abounds or there is an attempt to oversimplify in order to cut through the confusion.The answer ...
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Liquid drum storage for oil Do's and Don'ts
Liquid drum storage for oil Do's and Don'ts1. Do keep bungs drawn down tight. Do use a bung wrench to make sure. Don't forget to replace bungs. Don't put them in only finger tight.2. Do store drums inside whenever possible. Warm storage in winter is preferable.3. If drums must be stored outside:a. Do ...
