ASTM D924 PDF

ASTM D Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Electrical Insulating Liquids. Find the most up-to-date version of ASTM D at Engineering We perform testing by ASTM D on electrical insulating liquids used in cables, transformers, oil circuit breakers, and other electrical apparatus.

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Do not dry test cells made of Monel at this elevated temperature for more than 90 min as oxidation will take place causing erroneous results. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Specific warnings are given in As a precaution asgm this eventuality, use a suitable stopper to plug this opening prior to starting the cleaning operation.

Cleaning Test Cell The concentric cylinders are of nickel-plated brass which are mounted on a TFE-uorocarbon base and contained in an mL borosilicate glass beaker. Metals that have been found satisfactory from this standpoint are gold, nickel, Monel, platinum, and stainless steel. A less satisfactory method is use of a hot plate, but variations in temperature throughout the cell may lead to questionable results.

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ASTM D液体绝缘材料介质损耗测试法_百度文库

Huazheng Electric Manufacturing Baoding Co. Not exactly what you want? Number of Tests Large-screen LCD,backlight, display is clear. For optimum procedure do not exceed 20 min for this time. Insulating Oil Dielectric Loss Tester. Replace the beaker with the remainder of the heated sample on the hot plate. The oven must be capable of meeting the temperature requirements set out in Section HS code is ; 2.

Find Similar Products By Category. When used as the dielectric in a capacitor, it is desirable to have a higher value of relative permittivity so the physical size of the capacitor may be as small as possible. Remove the inner electrode and hold it suspended in air; then decant the rinsing liquid and immediately ll the cell from the remainder of the heated specimen.

Some liquids, such as oils of petroleum origin, undergo changes when exposed to sunlight.

ASTM D924 method Transformer Oil Dielectric Loss And Tan-delta Tester

Send This is not what you are looking for? Replace the inner electrode. How do you ship the products? The volume of oil required when using this cell is mL. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Rinse all parts thoroughly with hot tap water, then with cold tap water, followed by several rinses with distilled water.

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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Contact Supplier Start Order.

Can be delivered by air,ship and express. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. Plated surfaces that may be satisfactory for testing liquids having low acidity and for short periods of time are gold, platinum, nickel, chromium over nickel, or rhodium.

Shipped in 15 days after payment. If you feel that your comments have not received a asm hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. We have our own manufacturing factory,pls see the below certificate,we are the direct supplier.

Measurements are made at many different temperatures.