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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Measurements are made at many different temperatures.

People who viewed this also viewed. However, an intermediate value of relative permittivity may sometimes be advantageous in achieving a better voltage distribution of a-c electric elds between the liquid and solid insulating materials with which the liquid may be in series. We Do Our Best for You! Mercury, or its vapor, may be hazardous to health and corrosive to materials. In general, since the dissipation factor or power factor of insulating oils in good condition have decimal values below 0.

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

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Oil cup is cleaned automatically and has electrode calibration function. Metals that have been found satisfactory from this standpoint are gold, nickel, Monel, platinum, and stainless steel. 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.

Send your message to this supplier. Solvents mentioned in Please see the below display and the operation details: Find Similar Products By Category. Last previous edition approved in as D — Take care not to lay the electrodes on any surface.

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ASTM D液体绝缘材料介质损耗测试法_百度文库

It is required, however, that the precision of the measurements meets the intended accuracy of this test method. The oven must be capable of meeting the temperature requirements set out in Section You Might Also Like. The manner in which dissipation factor varies with frequency is determined by the nature of the dielectric losses, that is, whether they are predominantly polar or ionic, or are a combination of both types. 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.

Preparation of Specimen and Filling Test Cell 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.

Huazheng Electric Manufacturing Baoding Co. Leakage across these paths has been found to produce an unsteady bridge balance on awtm bridges. No fumigation,not influence the delivery; 4. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

Mercury, or its vapor, may be hazardous to health and corrosive to materials. For routine tests, however, the requirement for a guard electrode may be waived, provided that the two-electrode cell used is of adequate capacitance and with sufficient ratio of surface area to sample thickness, in order to provide proper operation of the measuring equipment. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

How do you ship the products? Specic d9224 are given in Number of Tests Large-screen LCD,backlight, display is clear. In general, since the dissipation factor or power factor of insulating oils in good condition have decimal values below 0. Users of this standard are asm advised that determination of the r924 of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. No minimum capacitance is therefore suggested.

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Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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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 d24 handling. The volume v924 oil required when using this cell is mL. In some research investigations, tests may be made at considerably higher astn while ast, other cases, particularly for tests on cable oils in service, tests may be made over a range of temperatures.

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.

For optimum procedure do not exceed 20 min for this time. Transformer tester, High voltage generatorRelay test kitPower quality analyzerinsulating oil testerHigh voltage tester, Insulation tester, Earth resistance tester and so on.

Not exactly what you want? For decimal values up to 0. In general, the use of a forced-draft air test chamber or automatic thermo-regulator cell is preferable. Decant the rinsing liquid and immediately ll the cell with a new aliquot of sample.