Power cable

Abstract

The invention discloses a power cable, comprising two first conductors and two second conductors, wherein the section of each first conductor is fan-shaped, the section of each second conductor is circular, the two first conductors are symmetrically arranged, the two second conductors are arranged between the two first conductors and are tangent to the side edges of the two first conductors respectively, an anti-flaming wrapping layer, a steel wire braiding armoring layer and an outer sheathing layer are sequentially wrapped outside the two first conductors and the two second conductors, and bent waist-shaped gap filling tapes are arranged outside the two first conductors. The power cable in stable in structure and excellent in conductivity, under the power supply condition with the rated voltage of 0.6 / 1kV, the insulating reliability of a polyvinyl chloride insulating layer is high, the anti-flaming performance is good, and when the power cable is on fire, the anti-flaming wrapping layer and the outer sheathing layer form a thermal insulation and oxygen resistance carbonization layer for protecting the cable, so that flame is prevented from being expanded and burning the cable.

Description

technical field [0001] The invention relates to the technical field of electric wires and cables, in particular to a power cable. Background technique [0002] Power cables are used for the transmission of strong electric energy in the transmission, distribution, transmission, transformation, and power supply lines. The current passing through them is large (tens of amps to thousands of amps), and the voltage is high (220V to 5000kV and above). [0003] Power cables are divided into several varieties according to their main characteristics such as scope of use, structural characteristics and performance requirements, and power cables are one of them. Power cables are mainly laid indoors, in tunnels and pipelines, and can also be laid underground. The existing ordinary 0.6 / 1kV power cables have problems of poor structural stability and flammability, which adds a certain degree of difficulty to the design of power cables. Therefore, the safety level of electrical lines and th...

AI Technical Summary

Problems solved by technology

The existing ordinary 0.6 / 1kV power cables have problems of poor structural stability and flammability, which adds a certain degree of difficulty to the design of power cables. Therefore, the safety level of electrical lines and the flame retardancy of cables have increasingly aroused people's attention. Attention, the flame retardancy of cables has become a comprehensive development direction of the cable industry

[0004] At the same time, the current-carrying capacity of the power cable is usually related to the cross-sectional area of ​​the conductor core. When the current increases, the temperature of the conductor will increase. When the temperature of the insulating layer covered by the conductor exceeds the upper limit, the performance of the insulating layer will change. , so that the insulation reliability of the insulating layer is greatly reduced, affecting the service life of the power cable

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