ASTM D924 PDF

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.

Author: Kazikasa Fekinos
Country: Uganda
Language: English (Spanish)
Genre: Marketing
Published (Last): 27 December 2004
Pages: 463
PDF File Size: 5.27 Mb
ePub File Size: 6.88 Mb
ISBN: 618-3-57815-774-6
Downloads: 94116
Price: Free* [*Free Regsitration Required]
Uploader: Fenrizil

Decant the rinsing liquid and immediately ll the cell with a new aliquot of sample. Cleaning Test Cell Large-screen LCD,backlight, display is clear. Enter between 20 to 4, characters.

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

If it is not feasible, the length of time the sample is exposed to atmospheric conditions must be kept to a minimum. Replace the beaker with the remainder of the heated sample on the hot plate. D — 08 Standard Test Method for Dissipation Factor or Power Factor and Relative Permittivity Dielectric Constant of Electrical Insulating Liquids1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

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. Measurements are made at many different temperatures.

Link to Active This link will always route to the current Active version of the standard. 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by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

  EDUCAR EN VERDE HEIKE FREIRE PDF

ASTM D液体绝缘材料介质损耗测试法_百度文库

Precision and Bias Stir the uid frequently during heating. China hair loss China weight loss equipment China vacuum fat loss machine. Some liquids, such as oils of petroleum origin, undergo changes when exposed to sunlight. Specific warnings are given in Immediately return the lled cell to the test chamber adjusted to a temperature above the desired test temperature and make the necessary electrical connections to the cell.

In general, the use of a forced-draft air test chamber or automatic thermo-regulator cell is preferable. 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. Insert the inner electrode and rinse the electrodes by twice raising and lowering the inner electrode.

Remove the inner electrode and hold it suspended in air; then decant the rinsing liquid and dd924 ll the cell from the remainder of the heated specimen.

Current edition approved Nov. Get Latest Price Min. What is the warranty for the product? D — 08 FIG. 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.

Historical Version s – view previous versions of standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The alignment of astn electrodes shall not be inuenced by this temperature nor by the operation of lling the cell with the test liquid. On asfm instruments the cell must be in place before lling with specimen.

  H PARA HOMBRES CECI PONCE PDF

Insulating Oil Dielectric Loss Tester. Insulating oil dielectric loss tester unit tan delta test equipment. The tester is characterized by integrated structure, and integrates test cell, temperature controller, temperature sensor, dielectric loss test bridge, AC test power, standard capacitor, high resistance meter, DC high voltage source and other major components.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Also refer to Test Methods D for detailed discussion of terms. A low dissipation factor or power factor indicates low ac dielectric losses. 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.

No minimum capacitance is therefore suggested. Metals that have been found satisfactory from this standpoint are gold, nickel, Monel, platinum, and stainless steel. A superscript epsilon indicates an editorial change since the last revision or reapproval. However, an intermediate value of relative permittivity may sometimes be advantageous in achieving a better voltage distribution of ac electric fields between the liquid and solid insulating materials with which the liquid may be in series.

Equipped with over-voltage, over-current and limit protections.