Aerial cable

A kind of overhead cable and aluminum stranded wire technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of weak current system equipment communication equipment hazards, cable allowable current reduction, transformer copper loss increase, etc., to reduce radiation Effects of interference, reduction in power loss, and increase in production costs
CN101329928AInactive Publication Date: 2008-12-24NINGBO WANBO INNOVATIVE MATERIAL & TECH
0 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NINGBO WANBO INNOVATIVE MATERIAL & TECH
Publication Date
2008-12-24
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an aerial cable which comprises a reinforced core and an aluminum stranded wire layer, wherein, the aluminum stranded wire layer is divided into an outer aluminum stranded wire layer and an inner aluminum stranded wire layer which are respectively formed by the twisting of a plurality of aluminum wires; each single aluminum wire is coated by an insulation layer; the aerial cable has the advantages that each single aluminum wire is coated or covered by the insulation layer; therefore, currents do not influence each other due to magnetic fields produced by adjacent wires during the transmission process of an alternating current (adjacency effect refers to the phenomenon that wires get close to each other, and the current density in each wire is not even any more) so as to eliminate AC resistance caused by the said 'crowded current' and cause the current transmission to be distributed on each wire, thereby greatly increasing the effective area of a cable conductor and reducing the impedance of the conductor and electric power consumption.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a cable, in particular to an overhead cable. Background technique

[0002] The overhead cable is used to transmit alternating current. The overhead cable includes a strengthening core and an aluminum strand layer, and the strengthening core is arranged at the center of the aluminum strand layer. Usually the aluminum stranded wire layer is divided into an outer aluminum stranded wire layer and an inner aluminum stranded wire layer. A bare aluminum wire is twisted clockwise around the reinforcing core. When the alternating current passes through the aluminum strand layer of the overhead cable, the current distribution on the cross section of the aluminum strand layer is uneven due to induction, and the closer the surface of the aluminum strand layer is, the greater the current density is. This phenomenon is called "skin effect". The skin effect increases the effective resistance of overhead cables and consumes power in transmis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More