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Typical chromatogram of furan derivative analysis by HPLC
HPLC is a form of column chromatography. It utilizes a column that holds chromatographic packing material (stationary phase), a pump that moves the mobile phase through the column, and a detector that shows the retention times of the molecules. Components to be analyzed are first dissolved in a solvent, ...
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Furanic compounds in transformer oil
Furfural analysis is gaining popularity in the recent trend of transformer insulation strength assessment, transformer remnant life estimation or related research field. This is due to its direct connection with the solid insulation strength in the power transformer system. ASTM D5837 is the widely used ...
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Diagnostic Techniques in Power Transformer Insulation
A power transformer insulation system consists of solid (paper) and liquid (insulating oil) insulation. Their insulation strength degrades over a period of time depending on transformer loading and the surrounding environment condition. The characteristics of by-product generation and changes in properties ...
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Deterioration Mechanisms in Transformer Insulation
Liquid insulation is a type of mineral oil made by refining a fraction of the hydrocarbons collected during the distillation of a petroleum crude stock. The basic requirement of this mineral oil has to be in agreements with standard specifications developed by groups of experts such as ASTM Standard ...
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Power transformer insulation strength assessment
Current practicing engineers use a number of modern diagnostic techniques to assess the insulation condition of aged transformers. These techniques are categorized into electrical and chemical analysis. Electrical analysis such as: Partial discharge (PD) analysis Dielectric breakdown voltage measurement ...
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Power transformer failures
The reliability and continuous performance of the power transformer is one of the vital key to profitable power generation and transmission. However, due to the practice of minimizing the capital expenditures of electrical power system, it is very common to operate these equipments close to the limits ...
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Power Transformer
Large oil-filled electrical power equipment is a critical element in an electrical power system. Power transformer is utilized to raise or lower the voltage level as needed to serve the transmission or distributino networks. Through the use of device such as the transformer, AC electric power is generated ...
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What is the meaning of TBN and TAN?
You may have seen or heard the terms TBN or TAN being used. TBN stands for Total Base Number, while TAN is short for Total Acid Number. Both of the tests monitor the effective life of in-service lubricants. The terms for "Total Base Number" and "Total Acid Number" are generally outdated terms and the ...
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Operation procedure of K632 total acid number analyzer
1. Put the extraction liquid and neutral liquid into the place at the back of instrument, cover them by extraction liquid cap and neutralizer cap, then, follow the operation procedure.2. Connect to the power, start up the instrument.3. Enter Manual Operation interface, choose “Filling neutral fuild”, ...
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Transformer oil dielectric strength - test low dielectric strength oil
The dielectric strength of this kind of oil is usually between 15kV and35kV. The instrument can test it normally too. During rising of voltage, a fewbubble particulate or impurities will be adsorbed to electrode gap to causedischarge. The bubble will be broken through and pushed out from electrode gap,and ...
