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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Automatic Oil Tester kV, ASTM D, ASTM D, ASTM D, IP
Particular reference should be made to the general precaution statement of this test method. Calibration s shall be traceable to national standards and calibration should be verified annually or more often to ensure accuracy requirements. Provide the test cell with a motor-driven two-bladed impeller and drive shaft, constructed of a material having high dielectric strength. If it is necessary to readjust the electrodes, lock the electrodes and check the spacing.
Type text as it appears:: 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. The spacing agreed upon shall be measured with the gage that corresponds exactly to the selected spacing within tolerance stated above for the gage.
After careful inspection, any electrodes from which pitting cannot be removed by light buffing should be discarded, as more refinishing would destroy the electrode contour and dimensions shown in Fig. 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, The quality of the insulating oil must be checked at regular intervals to ensure a long equipment service life.
Flat “go” and “no-go” gages may be substituted having thicknesses of the specified value more or less 0. Right-click to open the PDF in a new window or download it: Request a Free Quote Right Now. 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 chamois that have been in contact with the hands. 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.
Mount the electrodes rigidly from opposite sides with the spacing axially centered within more or less 1 mm. After adjustment of the spacing, rinse the cell with a dry hydrocarbon solvent, such as kerosine or solvents of Specification D So that the breakdown may be observed, transparent materials are desirable, but not essential. 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.
Determination of the dielectric breakdown voltage of insulating oils provides an early detection method for any reduction in the insulating properties. Power by seonoco All Rights Reserved: Link to Active This link will always route to the current Active version of the standard. 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. Adjustment and Care of Electrodes and Test Cell 7.
A lower than anticipated value is considered as evidence of cell contamination; then repeat the cleaning and the breakdown test with clean dry oil.
ASTM Method being used? Refer to Terminology D for definitions used in this test method.
What are your requirements. 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 Up to 75kV rms symmetrical Voltage measurement accuracy: 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 sample shall be taken in a dry, clean, non-permeable bottle.
High Voltage Inc TCD-5 Test Cell 60KV – ASTM D1816 test specs
Pharmaceutical laboratory apparatus stability chambers, tablet disintegration, tablet dissolution, tablet hardness, V-blenders, Tightly seal and shield from light until ready to be tested. This test method should be used as recommended by professional organization standards such as IEEE C Conduct a voltage breakdown test on a specimen of this oil in the manner specified in this test method.
If the test of any sample is below the breakdown value 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.
A cell having a capacity of 0. Automatic equipment should be used to control the voltage rate of rise because of the d816 of maintaining a uniform voltage rise manually.