ASTM D specifies that for insulating fluids to qualify ASTM D – Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using. Page 1. Page 2. Page 3. Page 4. ASTM D DIELECTRIC BREAKDOWN VOLTAGE OF LIQUIDS. This test method describes two procedures, A and B, for determining the electrical breakdown.
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It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior s877 use. Test Method D is not sensitive to low levels of these contaminants. Therefore, results of two properly conducted tests in different laboratories on the same sample of oil should not differ by more than These liquids include petroleum oils, hydrocarbons, natural and synthetic esters, and askarels PCB used as insulating and cooling liquids in transformers, cables, and similar apparatus.
Calibration s shall be traceable to national standards and should be conducted annually or more often. Test Method D should xstm used to determine the breakdown voltage of filtered and astmm liquids. If the range is acceptable, report this mean value as the dielectric breakdown voltage. The power-frequency breakdown voltage of a liquid is reduced by the presence of contaminants such as cellulosic fibers, conducting particles, dirt, and water.
We are a non-profit group that run this website to share documents. Note the sharp edge fits into the radius gage and only one side of the gage fits up against the aastm while the other side has considerable space.
V877 the maximum voltage reached prior to the breakdown. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. During testing, maintain at least two significant digits for each breakdown.
Hipotronics TCDE Oil Dielectric Test Cell for ASTM D testing – Mitchell Instrument Company
These liquids include petroleum oils, hydrocarbons, and askarels PCB used as insulating and ast liquids in transformers, cables, and similar apparatus. If this occurs, the cup should be warmed slightly to evaporate any 8. If the allowable range astn exceeded, the error is too large. Test Method D is not sensitive to low levels of these contaminants.
Size px x x x x The breakdown test uses ac voltage in the power-frequency range from 45 to 65 Hz.
Significance and Use 3. The voltage in the test circuit should be stable enough to be practically unaffected by varying current flowing in the capacitive and resistive paths of the asstm circuit. Retain all breakdown values. Historical Version s – view previous versions of standard Translated Version s: 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.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. The use of Procedure B will result in a more accurate value of breakdown voltage when testing such liquids.
If pitting or scratches asfm the disk faces are found, examine the electrodes in accordance with 7. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Procedure B, modified in accordance with Section 17 of Test Methods D, is acceptable for testing silicone dielectric liquids if the requirements of 1.
Hipotronics TCDE Oil Dielectric Test Cell for ASTM D877 testing
Calibrate and label automatic controls in terms of rate-of-rise. Construct the cup so that no part is less than The gray area represents the disk and the white area represents the gage. Fill the cup with a specimen from a sample with a known breakdown voltage. Report “Astm d – 02 Dielectric Breakdown”. For further information refer to RR: If a second series of five breakdowns is required fill the cup with a new specimen in accordance with 8. Automatic equipment should be used to control the voltage rate of rise because of the difficulty of maintaining a uniform voltage rise manually.
This test method should be used as recommended by professional organization standards such as IEEE C Procedure A may be used once the single operator precision of The power-frequency breakdown voltage of a liquid is reduced by the presence of contaminants such as cellulosic fibers, conducting particles, dirt, and water. Retain all breakdown test values. The sample container should not be swirled as prescribed in 8.
A number in parentheses indicates the year of last reapproval. It is important to avoid touching the electrodes or the cleaned gage with the fingers or with portions of the tissue paper or chamois that have been in contact with the hands. In order to permit the escape of air, allow the liquid to stand in the cup for not less than 2 min and not more than 3 min before voltage is applied.
The use of Procedure Satm will result in a more accurate value of breakdown voltage when testing such liquids. D — 02e1 Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes1 This standard is issued under the fixed designation D ; the number immediately following the designation indicates the year of original adoption or, d877 the case of revision, the year of last revision.
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