Three-phase multi-core parallel current sharing cable structure

Abstract

The invention relates to a three-phase multi-core parallel current sharing cable structure, which comprises a central support layer, a main power transmission layer arranged outside the central support layer and a protective layer arranged outside the main power transmission layer, wherein the main power transmission layer includes at least three groups of multi-core power wire cores sequentiallyarranged around the central support layer, and the space occupied by each group of multi-core power wire cores is exactly equal; the multiple wire cores in each group of the main power transmission layer are completely equivalent in space position; the multi-core power wire cores include a power wire core group A, a power wire core group B and a power wire core group C which are arranged in sequence, there are 3*N groups of multi-core power wire cores, and N is a positive integer. The three-phase multi-core parallel current sharing cable structure has the distinguishing characteristics of highcurrent transmission, high carrying capacity per unit section, low temperature rise, low heat consumption and the like. The distinguishing characteristic system takes strong measures such as completely equivalent arrangement in space of multiple multi-phase cables at the same time so as to effectively prevent current deviation among multiple in-phase cables and prevent thermal aging, fire breaking, short circuits and the like caused by local overload. The three-phase multi-core parallel current sharing cable structure effectively overcomes the defects of single line overload, short circuit and easy fire breaking caused by the deviation of the traditional parallel cables in high current transmission.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to a three-phase multi-core parallel current sharing cable structure. Background technique [0002] With the development of society, the level of electrification has increased, and the power consumption has greatly increased. At present, medium and high voltage transmission and high voltage motors are generally used, or copper and aluminum bars, bus bars, or three-phase multiple cables are used in parallel. The former two have safety problems, cost problems, and space problems in some places, so they cannot be applied, such as high-current power transmission between transformers and main switch cabinets in power plants or large factories, and between switch cabinets and high-power equipment. Therefore, the parallel connection of multiple single-core cables with large cross-sections in the same phase is widely used in high-current power transmission between transformers and swi...

AI Technical Summary

Problems solved by technology

To solve the problem of large current transmission between the transformer and the main switchgear, between the switchgear and high-power equipment in power plants or large factories

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