What are the mechanical performance indicators of overhead insulated cable? (Automobiles & Vehicles - Motorcycles)
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Item ID 3022325 in Category: Automobiles & Vehicles - Motorcycles
What are the mechanical performance indicators of overhead insulated cable? | |
1. Tensile strength Tensile strength is one of the most important mechanical performance indicators. In an overhead laying environment, the overhead insulated cable needs to bear its own gravity and possible external forces such as wind load and ice load. Good tensile strength can ensure that the overhead insulated cable will not break easily in a suspended state. For example, when encountering strong winds, the overhead insulated cable will be subjected to a large tensile force. If the tensile strength is insufficient, the overhead insulated cable may be stretched and deformed or even broken. The tensile strength is usually measured by a tensile test. The overhead insulated cable sample is fixed on a tensile testing machine, and the tensile force is gradually applied until the overhead insulated cable breaks. The tensile force value at the time of breakage is recorded and compared with the standard requirements to determine whether the overhead insulated cable meets the requirements. 2. Compressive performance Compressive performance should not be ignored either. During the installation process, the overhead insulated cable may be squeezed by external objects. For example, during the laying of the overhead insulated cable, contact with other equipment or the ground may generate pressure. During operation, it may also be pressed by objects such as branches. Appropriate compressive resistance can ensure that the conductor and insulation layer inside the overhead insulated cable are not damaged. Its indicators are evaluated through compressive resistance test. The overhead insulated cable is placed under the pressure tester, and the pressure is gradually increased to observe the deformation of the overhead insulated cable when it is subjected to a certain pressure and whether there are problems such as insulation layer rupture and conductor deformation, so as to determine whether the compressive resistance of the overhead insulated cable meets the needs of actual applications. 3. Bending performance It also needs to have good bending performance. During the installation process, the overhead insulated cable needs to be laid around facilities such as poles and towers, which requires the overhead insulated cable to be able to withstand a certain degree of bending without damage. Overhead insulated cables with poor bending performance may have insulation layer rupture or conductor breakage at the bend. This performance is tested through bending test. The overhead insulated cable sample is bent multiple times around a cylinder of specified diameter, and then the appearance, insulation performance and electrical performance of the overhead insulated cable are checked to determine whether it can still work normally after bending. 4. Anti-torsion performance Anti-torsion performance is also a key mechanical performance indicator. In some special cases, such as when affected by unbalanced external forces or changes in wind direction, the overhead insulated cable may twist. If the anti-torsion performance of the overhead insulated cable is poor, the twisted structure of the internal conductor may be destroyed, affecting the electrical performance of the overhead insulated cable. The anti-torsion performance test usually fixes one end of the overhead insulated cable and applies torque to the other end to observe the maximum torque that the overhead insulated cable can withstand and the damage to the overhead insulated cable under the torque, so as to evaluate whether its anti-torsion performance meets the requirements of overhead laying. | |
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| Target State: All States Target City : All Cities Last Update : 06 November 2024 3:12 PM Number of Views: 50 | Item Owner : fang Contact Email: Contact Phone: (None) |
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2024-11-24 (0.387 sec)