Frequently Asked Questions from TANO CABLE

1. DC voltage cable insulation volume resistivity of the electric field distribution depends on the material, and the electric field distribution depends on the Ac voltage of each of the dielectric constant of the medium, especially in the DC cable terminal head, connector boxes and other cable accessories in alternating electric field intensity distribution and the distribution of the field strength is completely different, and the mechanism and the mechanism of aging DC voltage AC voltage insulation aging is not the same. Therefore the DC voltage test can not simulate high voltage cable operating conditions. 2. 10kV High tension power cable in the DC voltage will have a"memory"effect, unipolar accumulation of residual charge storage. Once you have the test because the DC voltage caused by "memory, that will take a long to release the DC bias If the DC cable before the release of residual charge is not fully operational, it will be superimposed on the DC bias power frequency voltage peak, the cable so that the voltage value far exceeds its rated voltage, which may cause the cable insulation breakdown. 3. DC voltage test, there will be injected into the polymer inside the electronic media, the formation of space charge, so reducing the electric field strength of the premises, making it difficult to breakdown occurs. Semiconductor contamination and projections at the point of high-voltage cables, etc. prone to space charge. However, if the cable terminal head occurs when the surface flashover test cable attachment or breakdown will cause the cable core line generated wave oscillation, has been the accumulation of space charge of the place, since the oscillation voltage polarity is rapidly changing different polarity, so that the at a field strength significantly increased, it may damage the insulation, resulting in more clicks to wear. 4. The 10kV high tension power cable fatal weakness is easy to produce water tree inside insulation, once the water branch. in the DC voltage will be rapidly converted the formation of discharge and accelerated the deterioration of insulation, so after running frequency voltage is formed converted into electrical trees, and the formation of discharge and accelerated the deterioration of insulation, so after running frequency voltage is formed under the action breakdown. And pure water trees in the AC operating voltage can remain fairly voltage value, and can be maintained for a period of time.

1. Observe the Roundness of the Insulating medium of RF Coaxial Cable Standard RF Coaxial Cable cross-section is rounded, the cable outer shield, aluminum foil affixed to the outer surface of the insulating medium, the outer surface of the medium, the more rounded, the smaller the gap between the aluminum foil and its appearance, the more rounded the gap becomes. Practice has proved that the smaller the gap, the better the performance of cable. in addition, a large air gap easily penetrated the shield and affect the service life of the cable. 2. Check RF Coaxial Cable Insulation Medium Consistency RE Coaxial cable insulation diameter fluctuations mainly affect media echo coefficients cable. this check can cross a section of cable insulation medium, double-check with a micrometer outer diameter of the points, to see whether it is consistent. 3. Detect the RF Coaxial Cable Braid RF Coaxial Cable braid shielding performance of the coaxial cable plays an important role in the centralized power supply and cable television lines or power return line, so the coaxial cable quality testing must be flat braid is tight look, by coaxial outer sheath cut, cut short coaxial cable braid, braid on the identification number, if consistent with the given values of the indicators for qualified, less than the target value given for the failure. In addition to single braided cable measured with a micrometer screw, at the same price, the thicker the diameter, the better the quality. 4. Check the Quality of Aluminum Foil of RF Coaxial Cable Shielded RF Coaxial Cable plays an important role in the aluminum foil, which has an important role in preventing open external signal interference with the cable signal leakage connection, coaxial cable and therefore new entrants should check the quality of the aluminum foil. First, cut open the sheathing layer, and observe weather the wire braid layer of aluminum foil to maintain a good surface gloss; second is to tale a length of cable , tightly wound in small metal shaft short cross-sectional drawing of aluminum foil and rub repeatedly in the hands, yet after repeated rubbing and stretching breakage, has a certain toughness qualified otherwise defective. 5. Check the Outer Sheath of Extruded Tightness of RF Coaxial Cable High-quality RF Coaxial Cable outer sheath are very tight package, which can narrow the gap between the inner shield to prevent air into the cause oxidation, preventing relative sliding shield layer causes the electrical properties of drift, but crowded pack too tight will cause inconvenience stripping head increase the difficulty of construction Check method is to take 1m long cable at the stripped end of the sheath, in order to force can not pull the thread core is suitable. 6. Observe the Cable into a Circle Shape Cable knitting is not just a cosmetic problem, but also quality problems, Looped flat cable, each cable remains on the same concentric plane into between the cable and the cable between the cable and the cable parallel to the overall arc in contact with each other to reduce the cable by force, not easily deformed stacked injury, so the quality of cable and acceptance when this can not be taken lightly.

Protection material of high tension wire which greater than 11kV is XLPE insulation, and outer sheath such as plastic, rubber, steel wire armor(SWA), steel tape armor(STA), aluminum wire armor(AWA), aluminium tape armor(ATA), chain armor, aluminum wrinkles sheath etc.

You can get H07RN-F cable size by checking the printing word on cable or measuring the single wire of the conductor.

Flexible wires and cables are widely used in factory machinery mining machinery and mobile equipment and so on.

Control cables are used in factory equipment, power plants, switch gear, and where there is control equipment.