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
|Published (Last):||6 August 2013|
|PDF File Size:||14.81 Mb|
|ePub File Size:||12.66 Mb|
|Price:||Free* [*Free Regsitration Required]|
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 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.
Power by seonoco All Rights Reserved: Link to Active This link will always route to the current Active version of the standard. A test cell having a capacity of 0. The test cell shall be designed to permit easy removal of the electrodes for cleaning and polishing, verification that the asgm is within the specified tolerance, and to permit easy adjustment of the gap spacing.
Automatic Dielectric Oil Tester 100 kv
Clearance from the electrodes to all sides, bottom, cover or baffle, and any part of the stirring device is at least Measurement of oil temperature: Historical Version s – view previous versions of standard.
Request a Free Quote Right Now.
Do not use a low boiling point solvent, as its rapid evaporation may cool the cell, causing moisture condensation. Tightly seal and shield from light until ready to be tested. 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.
Up to 75kV rms symmetrical Voltage measurement accuracy: 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 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.
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, Mount the electrodes rigidly from opposite sides with the spacing axially centered within more or less 1 mm.
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 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.
It has been found to be especially useful in diagnostic and laboratory investigations of the dielectric breakdown strength of insulating liquid in insulating systems.
ASTM D Test Method for Dielectric Breakdown Voltage of Insulating Oils – YONGRUN
Aztm 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 c1816 to moisture and the cleaning and test liquids. Available request a quote. 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.
This test method is xstm to insulating liquids commonly used in cables, transformers, oil circuit breakers, and similar apparatus as an insulating and cooling medium. Automatic equipment should be used to control the voltage rate of rise because of the difficulty of maintaining a uniform voltage rise manually.
Provide the test cell with a motor-driven two-bladed impeller r1816 drive shaft, constructed of a material having high dielectric strength. What are your requirements.
asmt After adjustment of the spacing, rinse the cell with a dry hydrocarbon solvent, such as kerosine or solvents of Specification D IEEE Standard 4 is required during the manufacturing of the test apparatus and utilized during calibration of the equipment. After careful inspection, d186 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. If it is necessary to readjust the electrodes, lock the electrodes and check the spacing.
D1186 to Terminology D for definitions used in this test method. The voltage in the test circuit should be stable enough to be unaffected by varying current flowing in the capacitive and resistive paths of the test circuit.
Alternatively, the cell may be stored empty in a dust-free cabinet. 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.