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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Enter product namemake or model. Non-disruptive discharges in the test circuit should 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.
Avoid touching the electrodes or the inside of the cell after cleaning. Calibrate and label automatic controls in terms of rate-of-rise. Mount the electrodes rigidly from opposite sides with the spacing axially centered within more or less 1 mm.
If a dielectric breakdown does not occur 1d816 any of the consecutive breakdown tests using the 2 aztm spacing or the sample is not adequate for the 2 mm spacing test cell a 1 more or less 0. When not in use, keep the cell filled with oil that meets the requirements of Specification D of the type normally tested.
Historical Version s – view previous versions of standard.
Hipotronics TCVDE Oil Dielectric Test Cell for ASTM D1816 testing
Petroleum Products and Biofuel lab apparatus baths, calorimeters, color measurement, density meters, flash point, hydrogenators, oil testing, penetrometers, surface tension, vapor pressure, viscometers and rheometers, Flat aetm and “no-go” gages may be substituted having thicknesses of the specified value more or less 0.
Type text as it appears:: Provide the test cell with a motor-driven two-bladed impeller and drive shaft, constructed of a material having high dielectric strength.
Email Us or call toll-free: Plastic bottles are permeable and moisture content of the sample may change resulting in a measurable difference when compared to samples collected in non-permeable containers. Adjustment and Care of Electrodes and Test Cell 7.
Request a Free Quote Right Now. If the test of any sample is below the breakdown aztm 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. Up to 75kV rms symmetrical Voltage measurement accuracy: Right-click to open the PDF in a new window or download it: Determination of the dielectric breakdown voltage of insulating oils provides an early detection method for any reduction in the insulating properties.
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Tightly seal and shield from light until ready to be tested. At the beginning of each days testing, clean according to 7. A cell having a capacity of d8116. However, a high dielectric breakdown voltage does not necessarily indicate the absence of all contaminants; it may merely aastm that the concentrations of contaminants that are present in the liquid between the d1861 are not large enough to deleteriously affect the average breakdown voltage of the liquid when tested by this test method see Appendix X1.
Clearance from the electrodes to all sides, bottom, cover or baffle, and any part of the stirring device is at least Link to Active This link will e1816 route to the current Active version of the standard. It has been found to be especially useful in diagnostic and laboratory investigations of the dielectric breakdown strength of insulating liquid in insulating systems.
After adjustment of the spacing, rinse the cell with a dry hydrocarbon solvent, such as kerosine or solvents of Specification D After thorough cleaning, 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.
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Measurement of oil temperature: This test method is applicable to insulating liquids commonly used in cables, transformers, oil circuit breakers, and similar apparatus as an insulating and cooling medium.
Alternatively, the cell may be stored empty in a dust-free cabinet. The spacing agreed upon shall be measured with the gage that corresponds exactly to the selected spacing within tolerance stated above for the gage. 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.
If this occurs, before using, warm the cell to evaporate the moisture. Available request a quote. 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 d18816 the cleaning and test liquids. 1d816 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.
General Use laboratory apparatus balances, baths, blenders, centrifuges, chart recorders, freezers, fume hoods, furnaces, glassware washers, glove boxes, mixers, moisture testing, ovens, pumps, shakers, vacuum equipment, water purification So that the breakdown may be observed, transparent materials are desirable, but not essential.