Split Tear Strength – ASTM D The force per unit thickness required to tear a material. Test specimens are placed in a tensile test machine. The jaws are set. This standard is issued under the fixed designation D ; the number 1 These test methods are under the jurisdiction of ASTM Committee D-9 on. Electrical. ASTM D Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable.
These test methods do not apply to the class of products known as? The water absorption test values give an indication of how the insulation will perform in a wet environment. Xstm pressure, heat, or oxygen pressure Air oven For Oil Immersion 3 sstm 3 3 3 One specimen of each three shall be tested and the other two specimens held in reserve, except that when only one sample is selected all three specimens shall be tested and the average of the results reported.
The conductor shield shall be removed. After submersion for h, cool the water to room temperature.
ASTM D – 05 Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
A number in parentheses indicates the year of last reapproval. Types of Voltage Tests Calculate d4470 strength of the Na2S2O3 solution in accordance with Maintain the vessel completely full of water during the immersion period. Size of Wire, AWG or kcmil mm2 14 2. Remove any nonadherent protective coverings applied to the insulation.
When making high voltage tests, particularly in compressed gas or in oil, the energy released at breakdown may be suff? Excessive size results in greater delay in obtaining the desired ozone concentration. Voltage source must be capable of providing kV. In most cases a test specimen which s470 an entire section is obtained, free from surface incisions and imperfections.
Some materials are more susceptible to such discharge damage than others. Ozonization of the air is accomplished in a generator consisting of a pair of concentric electrodes, separated by a thin glass dielectric, between which voltage is applied. Click to learn more.
Discard the solution after one week and prepare fresh solution. Therefore, tests are done on insulated or jacketed wire or cable in these test methods solely to determine the relevant property of the insulation or jacket and not to test the conductor or completed cable.
In common with other electrical equipment, the use of cables is not recommended on systems where the ratio of the zero to positive phase reactance of the system at the point of cable application lies between? Do not heat, immerse in water, or subject the specimens to any mechanical or chemical treatment not speci?
Control the temperature by keeping the apparatus in an air-conditioned room or by partially immersing the chamber in a water bath, either connected to a hot-and-cold water system or provided with thermostatically controlled electric heaters.
The tank has a tightly? Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Continue the immersion for a period of h. Heat Distortion Test Move the burner up to the specimen so that the tip of the inner blue cone just touches the specimen at a point midway between the supports.
Historical Version s – view previous versions of standard. Because of this it is important to measure the concentration of ozone in the atmosphere, using commercially available monitoring devices, whenever the odor of ozone is persistently present or when ozone generating conditions continue.
The values obtained in these tests are useful to provide data for research and development, design engineering, quality control, and acceptance or rejection under speci? Oil Immersion Test Introduce the mercury at one end of the specimen between the insulation and the tinned surface of the conductor, with the specimen inclined on a support with the end to which the mercury is applied at the top.
Order of Testing Take the average of these determinations as the average thickness. D — 05 situations similar to those described in the test. The mandrel diameter shall be in accordance with Table 7.
Remove the outer braid, together with adhering compound, from a 6-in. It is essential that the test apparatus, and all associated equipment that may be d4700 connected to it, be properly designed and installed for safe operation.
The advantage in using this method is that after obtaining a calibration the ozone concentration is continuously readable on the microammeter without drawing a sample from the test chamber and thus upsetting equilibrium.
The test specimen shall be taken either from the cable in process or from the completed cable. With the exception of the tear tests, the test specimen shall be either a segment or sector cut with a suitable sharp instrument or a shaped specimen cut out with a die and shall have a cross-sectional area not greater than 0. During and after the application of the? Cool the specimen to room temperature. Control the pressure by the degree of closure of the discharge cock.
Equip the buffing apparatus with a cylindrical table arranged so that it can be advanced very gradually.
Complete the weighing within 2 min after removal from the bath. Water absorption testing provides useful data for research and development, design engineering, quality control, and acceptance or rejection under speci? Support the specimens in an approximately vertical plane midway between the top and bottom, with the free ends down to, but not touching, the bottom. Insulation Resistance Tests on Completed Cable. Introduce the ozonized air from the generator to the space below this?
It also measures the characteristic of the insulation to minimize spread of? It is usually desirable for a cable to have a high value of insulation resistance. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Privacy & Cookies Policy
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.