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Application Period - Dissolved Gas Analysis (DGA) of Mineral Oil Used in Transfo
In a new transformer, typical hydrocarbon gases concentration for good new oil after vacuum filtration would be within 5ppm. DGA shall be repeated once a month after commissioning and then at increasing intervals as found necessary. In an overhauled and repaired transformer, the transformer should be ...
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Normal Values of Dissolved Gas - Dissolved Gas Analysis (DGA) of Mineral Oil Use
The mineral oil will contain normal values of dissolved gas which will indicate no incipient fault in the transformer. The following figures show the normal values of dissolved gases in the oil. When the DGA results of all the 7 key gases are less than the values of figure, it can be concluded there ...
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Classification of Fault - Dissolved Gas Analysis (DGA) of Mineral Oil Used in Tr
There are several basic types of faults, which can occur in the transformer:Arcing or high current break down.Low energy sparking or partial discharges.Localized overheating or hot spots and general overheating due to inadequate cooling or sustained overloading.Each of the faults results in thermal degradation ...
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Mechanism of Gas Generation - Dissolved Gas Analysis (DGA) of Mineral Oil Used i
The cause for the gas generation in the mineral oil is the breaking of the chemical bonds in the hydrocarbon molecules of the mineral oil. Energy is needed for the breaking of the chemical bonds and this comes from the energy contained in the fault of the transformer. The gases generated include hydrogen(H2), ...
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Reasons of Dissolved Gas Analysis (DGA) of Mineral Oil Used in Transformer
Power generation industry is most important in any country all over the world. By and large entire economy of the country depends upon its capacity to generate power. During the last decade a lot of accidents took place in this industry and causes of these accidents/explosions remained unexplained. Recently ...
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Abstract of Dissolved Gas Analysis (DGA) of Mineral Oil Used in Transformer
Transformer oil is one of the most common materials used for transformers. The oil has two important functions. The oil need to provide cooling and electrical insulation for the transformer. Any deterioration in the oil can lead to the premature failure of the transformer. When the mineral oil is subjected ...
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Dielectric Strength (Breakdown Voltage), Test Method: IEC 156
The dielectric strength / breakdown voltage of an insulating oil is a measure of the oil's ability to withstand electrical stress without failure. The test involves applying an AC Voltage at a controlled rate to two electrodes immersed in the insulating fluid. The gap is a specified distance. When the ...
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Importance of transformer oil analysis
The fault free operation of power transformers is a factor of major economic importance and safety in power supply utilities and industrial consumers of electricity. In the current economic climate, Industries / Supply Utilites tighten their control on catital spending and make cutbacks in maintenance, ...
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DGA standard extraction methods
ASTM D3612 and IEC 60567 regulates the standard extraction methods of DGA.ASTM D3612-A: Vacuum ExtractionASTM D3612-B: Stripping MethodASTM D3612-C: Head Space Analysis
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Introduction of Measurement of Surface Tension
The measurement of Surface Tension is important in the development and quality control of such things as oil, ink, soap, detergent, pharmaceutical compounds, adhesives and a wide range of coatings. There are several methods used for measuring surface tension. The most common is a technique developed ...
