Overhead insulated cable
Release time:
2024-07-29
Source:
Overhead insulated cable is a kind of conductor with extruded insulation layer on the basis of single-layer or multi-layer aluminum strand stranding, which is mainly used for urban power distribution. The design of this cable is to solve the problem of complex short-circuit grounding and lightning strike lines in the urban power distribution environment, and improve the reliability of power supply by wrapping the insulation layer on the outer layer of the wire. Overhead insulated cables have various voltages and models. For example, models such as JKLYJ10KVA50 * 100 specify the voltage, model, material, cross-sectional area and length of the core.
Overhead insulated cable is a kind of conductor with extruded insulation layer on the basis of single-layer or multi-layer aluminum strand stranding, which is mainly used for urban power distribution.The design of this cable is to solve the problem of complex short-circuit grounding and lightning strike lines in the urban power distribution environment, and improve the reliability of power supply by wrapping the insulation layer on the outer layer of the wire. There are various voltages and types of overhead insulated cables, for example, JKLYJ10KVAThe model of 50*100 defines the voltage, model, material, cross-sectional area and length of the core of the cable.
The product standards and application scope of overhead insulated cables are wide, including GB/T 12527-2008 "Overhead Insulated Cables with Rated Voltage of 1kV and Below" and GB/T 14049-2008 "Overhead Insulated Cables with Rated Voltage of 10kV" and other standards, which are applicable to overhead fixed laying power lines and lead-in lines with AC rated voltage of 1kV and below. The long-term allowable operating temperature of these cables and the maximum temperature during short circuit are clearly stipulated to ensure the safe operation of the cables.
The advantage of overhead insulated cables is that they are easy to construct and can be erected on any type of tower, and can even be erected along the wall or in the trees under special circumstances, reducing the maintenance and overhaul of the line. In addition, compared with bare conductors, overhead insulated cables have higher insulation performance, reducing the cost of line failures and the direct or indirect losses caused by them, so their overall cost is lower, more economical and more reasonable.
Overhead insulated cables have good weather resistance and can work safely under solar irradiation for a long time. The insulation material of the cable is made of polymer insulation material and a certain amount of carbon black to prevent the invasion of ultra-ultraviolet light and maintain the electrical insulation performance of the cable. The use of such cables not only improves the efficiency of power transmission, but also enhances the stability of the power grid, which is an indispensable part of the modern power system.
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