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ASTM D2440 Mineral Insulating Oil Oxidation Stability Test
The oxidation stability test of mineral transformer oils is a method for assessing the amount of sludge and acid products formed in a transformer oil when the oil is tested under prescribed conditions. Good oxidation stability is necessary in order to maximize the service life of the oil by minimizing the formation of sludge and acid.
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ASTM D1275 Transformer Oil Corrosive Sulfur Tester
KN-1275 Transformer Oil Corrosive Sulfur Tester conforms to ASTM D1275 Standard Test Method for Corrosive Sulfur in Electrical Insulating Oils. In most of their uses, insulating oils are continually in contact with metals that are subject to corrosion. The presence of corrosive sulfur compounds will result in deterioration of these metals. The extent of deterioration is dependent upon the quantity and type of corrosive agent and time and temperature factors. Detection of these undesirable impurities, even though not in terms of quantitative values, is a means for recognizing the hazard involved.
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ASTM D924 Dielectric Dissipation Factor Tester
Dissipation Factor (or Power Factor)—This is a measure of the dielectric losses in an electrical insulating liquid when used in an alternating electric field and of the energy dissipated as heat. A low dissipation factor or power factor indicates low ac dielectric losses. Dissipation factor or power factor may be useful as a means of quality control, and as an indication of changes in quality resulting from contamination and deterioration in service or as a result of handling.
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ASTM D1816 Insulating Oil Dielectric Breakdown Tester
The dielectric breakdown voltage of an insulating liquid is of importance as a measure of the liquid ability to withstand electric stress without failure.
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