ASTM D – Standard Test Method for Dielectric Breakdown Voltage of Insulating Oils of Petroleum Origin. Using VDE Electrodes. ▫ IEC Insulating. Page 1. Page 2. Page 3. Page 4. Find the most up-to-date version of ASTM D at Engineering
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However, a high dielectric breakdown voltage does not necessarily indicate the absence of all contaminants; it may merely indicate that the concentrations of d18166 that are present in the liquid between the electrodes are not large enough to deleteriously affect the average breakdown r1816 of the liquid when tested by this test method see Appendix X1. Conduct a voltage breakdown test on a specimen of this oil in the manner specified in this test method. A lower than anticipated xstm is considered as evidence of cell contamination; asfm repeat the cleaning and the breakdown test with clean dry oil.
Provide the test cell with a motor-driven two-bladed impeller and drive shaft, constructed of a material having high dielectric strength. If the test of any sample is below the breakdown aatm being used by the operator as a minimum satisfactory value, drain the cell and flush the cell with new oil of the type to be tested that is filtered through a 5-micron filter and containing less than 25 ppm moisture before testing the next specimen.
Product Description The majority of high-voltage transformers, cables, switchgears, transducers, capacitors, and rectifiers use insulating oils for insulating electrically live parts and to carry off thermal energy. ASTM Method being used? Historical Version s – view previous versions of standard.
Request a Free Quote Right Now. After adjustment of the spacing, rinse the cell with a dry hydrocarbon solvent, such as kerosine or solvents of Specification D Enter product namemake or model.
So that the breakdown may be observed, transparent materials are desirable, but not essential. Atm Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Construct the test cell of a material of high dielectric strength, that is not soluble in or attacked by any of the cleaning or test liquids used, and is nonabsorbent to moisture and the cleaning and test liquids.
This test method should be used as asrm by professional organization standards such as IEEE C It has been found to be especially useful in diagnostic and laboratory investigations of the dielectric breakdown strength of insulating liquid in insulating systems. Link to Astmm This link will always route to the current Active version of the standard.
Power by seonoco All Rights Reserved: If this occurs, before using, warm the cell to evaporate the moisture. If the breakdown voltage is in the expected range for this conditioned oil, the cell is considered properly prepared for testing other samples.
General Use laboratory apparatus balances, baths, blenders, centrifuges, chart recorders, freezers, asgm hoods, furnaces, glassware washers, glove boxes, mixers, moisture testing, ovens, pumps, shakers, vacuum equipment, water purification Adjustment and Care of Electrodes and Test Cell 7.
The residue from the buffing should be removed by repeated wiping with lint-free tissue paper saturated with a suitable solvent, followed by solvent rinsing or ultrasonic cleaning.
It is important to avoid touching the electrodes or the cleaned gage with the fingers or with portions of the tissue paper or f1816 that have been in contact with the hands. Email Us or call toll-free: Determination d116 the dielectric breakdown voltage of insulating oils provides an early detection method for any reduction in the insulating properties.
Koehler K 75kV Dielectric Strength Tester (ASTM D, D) | Labequip
Pharmaceutical laboratory apparatus stability chambers, e1816 disintegration, tablet dissolution, tablet hardness, V-blenders, When not in use, keep the cell filled with oil that meets the requirements of Specification D of the type normally tested. At the beginning of each astmm testing, clean according to 7. Contact with us now Your mail: The dielectric breakdown voltage serves to indicate the presence of contaminating agents such as water, dirt, cellulosic fibers, or conducting particles in the liquid, one or more of which may be present in significant concentrations when low breakdown voltages are obtained.
Petroleum Products and Biofuel lab apparatus baths, calorimeters, color measurement, density meters, flash point, hydrogenators, oil testing, penetrometers, aastm tension, vapor pressure, viscometers and rheometers, Particular reference should be made to the general precaution statement of this test method. Work Item s – proposed revisions of this standard.
High Voltage Inc TCD-5 Test Cell 60KV – ASTM D1816 test specs
Measurement of oil temperature: The impeller, located below the lower edge of the electrodes, rotates in such a direction that the resulting liquid flow is directed downward against the bottom of the test cell. Lab Equipment for Sale: Non-disruptive discharges in the test circuit aastm not reduce the test voltage to such an extent, and for such a time, that the disruptive discharge breakdown voltage of the test specimen is significantly affected.
Tightly seal and shield from light until ready to be tested.
Refer to Terminology D for definitions used in this test method. Available request a quote. Automatic equipment should be used to control the voltage rate of rise because of the difficulty of maintaining a axtm voltage rise manually. 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.
In order to preclude stirring air with the sample, provide the cell with a cover or baffle that will effectively prevent air from contacting the circulating liquid. The spacing agreed upon shall be measured with the gage that corresponds exactly to the selected spacing within tolerance stated above for the gage.
The most important requirement of an insulating oil is a high dielectric strength. Alternatively, the cell may be stored empty in a dust-free cabinet. For referee tests or tests that will be used for close comparisons, the laboratories shall agree in advance on the spacing for the tests and ensure that all other requirements of this test method are met.
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