Intertwisted copper conductor medium-voltage power cable and preparation method thereof

Abstract

The invention discloses a mixed-twisted copper conductor medium-voltage power cable, and relates to the technical field of medium-voltage power cables, the mixed-twisted copper conductor medium-voltage power cable comprises a central twisted conductor, an inner-layer round copper wire twisted conductor is tightly twisted outside the central twisted conductor, an adjacent inner-layer S / Z type mixed-twisted conductor is tightly twisted outside the inner-layer round copper wire twisted conductor, and the inner-layer S / Z type mixed-twisted conductor is tightly twisted outside the inner-layer round copper wire twisted conductor. The outer surface of the twisted central conductor is smooth and tight, the adjacent inner-layer S / Z-type mixed-twisted conductors and the outer-layer S / Z-type mixed-twisted conductors are interlocked in a monofilament mode and are not prone to loosening during bending, the water resistance and the stability of the cable are improved, meanwhile, the cable is designed based on the current skin effect, and the service life of the cable is prolonged. The high-compression-coefficient structure of the surface layer facilitates passing of high-density current, the inner layer is adaptive to low-density current, the cost of consumables is reduced, the problem of conductor shielding embedding is solved, the breakdown probability of the cable is reduced, process requirements and production difficulty are low, the stability of the cable is effectively enhanced, and the service life of the cable is effectively prolonged.

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