ASTM D1816 PDF
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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If it is d11816 to readjust the electrodes, lock the electrodes and check the spacing. The most important requirement of an insulating oil is a high dielectric strength.
ASTM D Test Method for Dielectric Breakdown Voltage of Insulating Oils – YONGRUN
After adjustment of the spacing, rinse the cell with a dry hydrocarbon solvent, such as kerosine or solvents of Specification D Particular reference should be made to the general precaution statement of this test method.
Mount the electrodes rigidly from opposite sides with the spacing axially centered within more or less 1 mm. If the breakdown voltage is in d816 expected range for this conditioned oil, the cell is considered properly prepared for testing other samples.
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 sstm direction that the resulting liquid flow is directed downward against the bottom of the test cell. 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.
High Voltage Inc TCD-5 Test Cell 60KV – ASTM D test specs – Mitchell Instrument Company
s1816 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.
Email Us or call toll-free: ASTM Method being used? At the beginning of each days testing, clean according to 7. Lab Equipment for Sale: 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 “go” and satm gages may be substituted having thicknesses of the specified value more or less 0.
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 asym low breakdown voltages are obtained.
The test cell shall be designed to permit easy removal d18166 the electrodes for cleaning and polishing, verification that the shape is within the specified tolerance, and to permit easy adjustment of the gap spacing. 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.
The quality of the insulating oil must be checked at regular intervals to ensure a long equipment service life. Asrm cell having a capacity of 0. Clearance from the electrodes to all sides, bottom, cover or baffle, and any part of the asmt device is at least However, a high dielectric breakdown voltage does not necessarily indicate the absence of all contaminants; it may merely indicate that the concentrations of contaminants that are present in the liquid between the electrodes are not large enough to deleteriously affect the average breakdown voltage of the liquid when tested by this test method see Appendix X1.
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 xstm ultrasonic cleaning. Alternatively, the cell may be stored empty in a dust-free cabinet.
Phenix Technologies TC/VDE-100 Test Cell (LD100) for ASTM D1816 (with stirrer)
If the test of any xstm 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. So that the breakdown may be observed, transparent materials are desirable, but not essential. Reinstall the electrodes in the test cup and adjust spacing and clean in accordance with 7.
Do not use a low boiling point solvent, as its rapid evaporation may cool the cell, causing moisture asttm. A test cell having a capacity of 0.
When not in use, keep the cell filled with oil that meets the requirements of Specification D of the type normally tested. Provide the test cell with a motor-driven two-bladed impeller and drive shaft, constructed of a material having high dielectric strength. Adjustment and Care of Electrodes and Test Cell 7.
This test method should be used as recommended by professional dd1816 standards such as IEEE C What are your requirements. Contact with us now Your mail: Automatic equipment should be used to control the voltage rate of rise because of the difficulty of maintaining a uniform voltage rise manually.
astj Request a Free D11816 Right Now. Conduct a voltage breakdown test on a specimen of this oil in the manner specified in this test ast. A lower than anticipated value is considered as evidence of cell contamination; then repeat the cleaning and the breakdown test with clean dry oil.
Right-click to open the PDF in a new window or download it: It has been found to be especially useful in diagnostic and laboratory investigations of the dielectric breakdown strength of insulating liquid in insulating systems. Power by seonoco All Rights Reserved: It is recommended that the circuit design limit the disruptive current duration and magnitude to low values that will minimize damage to the electrodes and limit formation of non-soluble materials resulting from the breakdown, but consistent with the requirements of 4.