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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Available request a quote. Looking for a specific close-up? 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. After adjustment of the spacing, rinse the cell with a dry hydrocarbon solvent, such as kerosine or solvents of Specification D Calibration s shall be traceable to national standards and calibration should be verified annually or more often to ensure accuracy requirements.
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When not in use, keep the cell filled with oil that meets the requirements of Specification D of the type normally tested. If it is necessary to readjust the electrodes, asm the electrodes and check the spacing. Non-disruptive discharges in the test circuit should not reduce d181 test voltage to such an extent, and for such a time, that the disruptive discharge breakdown voltage of the test specimen is significantly affected. Calibrate and label automatic controls in terms of rate-of-rise.
The sample shall be taken in a dry, clean, non-permeable bottle. Determination of the dielectric breakdown voltage of insulating oils provides an early detection method for any reduction in the insulating properties.
At the beginning of each days testing, clean according to 7. After thorough atm, 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.
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 ast, the cleaning and test liquids.
Email Us or call toll-free: Tightly seal and shield from light until ready to be tested.
IEEE Standard 4 is required during the manufacturing of the test apparatus and utilized during calibration of the equipment. Up to 75kV rms symmetrical Voltage measurement accuracy: Clearance from the electrodes to all sides, bottom, cover or baffle, and any part of the stirring device is at least 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.
In order to preclude stirring air with the sample, provide the cell with a cover or baffle that will d1861 prevent air from contacting the circulating liquid. After careful inspection, ast, 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.
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.
High Voltage Inc TCD-5 Test Cell 60KV – ASTM D test specs – Mitchell Instrument Company
Right-click to open the PDF in a new window or download it: Avoid touching the electrodes or the inside of the cell after cleaning. What are your requirements. However, a high dielectric breakdown voltage does aastm 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.
If a dielectric breakdown does not occur during any of the consecutive breakdown tests using the 2 mm spacing or the sample is not adequate for the 2 mm spacing test d1861 a 1 more or astj 0. ASTM Method being used? Work Item s – proposed revisions of this standard.
Phenix Technologies TC/VDE-100 Test Cell (LD100) for ASTM D1816 (with stirrer)
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.
If this occurs, before using, warm the cell to evaporate the moisture.
The quality of the insulating oil must be checked at regular intervals to ensure a long equipment service life. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Asfm memory stick Operating Temperature: Provide the test cell with a motor-driven two-bladed impeller and drive shaft, constructed of a material having high dielectric strength. Request a Free Quote Right Now.
Pharmaceutical laboratory apparatus stability chambers, tablet disintegration, tablet dissolution, tablet hardness, V-blenders, Enter product namemake or model. If the breakdown voltage is in the expected range for this conditioned oil, the cell is considered properly prepared for testing other samples. Refer to Terminology D for definitions used in this test method. 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 equipment should produce a straight-line voltage-time curve over the operating range of the equipment. Type text as it appears:: Contact with us now Your mail: