UA9743U - Safe high-voltage cable - Google Patents

Abstract

The proposed safe high-voltage cable contains a core and insulating sheath made of cross-linked polyethylene, which provides the required electric strength of the cable insulation under high voltage. The core contains a number of aluminium-alloy wires that are wound onto a steel central wire. The core and the sheath of the core provide protection against electric shock, high tensile and bending strength, and resistance to short circuits.

Description

Description of the invention

A useful model refers to electrical cables and wires. 2 A known folded, discontinuous wire for overhead electrical networks, which has shaped protrusions on its elements in order to reduce wind noise and corona of the wire. Its disadvantage is the high cost, complexity and low productivity of the manufacturing technology |11.

The closest to the proposed useful model is a heterogeneous electric current wire, in which each element has a porous core, covered on the outside with a solid aluminum layer. Its disadvantage is also the high cost, complexity and low productivity of the manufacturing technology. In addition, the wire does not ensure the resistance of power lines to short circuits and can shock with electric voltage (21.

The task of a useful model is to provide the wire with resistance to tensile forces, short circuits and safety against electric shock.

The task is solved by the interrelationship of elements and materials of construction and manufacturing technology 79 of the proposed object.

Compliance with the "novelty" criterion for the proposed object is ensured by the fact that it additionally contains a layer of polyethylene cross-linked with peroxide or silanol compounds applied with pressing on top of the core, which perceives the effect of high voltage, and the core is made of aluminum alloy wires twisted around a central steel element and compacted after twisting so that the core and the layer of polyethylene, together provide safety against voltage damage, resistance of the wire to the action of tensile forces, bending and short circuit.

Compliance with the "significant features" criterion is ensured by the fact that the features characteristic of the proposed object are not contained in the prototype and other technical solutions in this field of technology.

In Fig. a schematic image of the object is given.

The wire contains a conductive core 1 and a polyethylene layer 2 placed on top of it. c

The wire works like this. The core is made of wires of a light aluminum alloy (for example, АВЕ) with a high limit of mechanical strength and high electrical conductivity. Wires twisted around a central steel element and compacted after twisting. This ensures low weight, high mechanical strength when the wire is pulled, wind, ice, etc. Sealing the core makes it possible to further reduce the weight of the wire by reducing the cross-section of both the conductive elements and the polyethylene layer at the same current load. The layer of polyethylene 2 perceives the action of high voltage and makes possible short circuits between the power line wires or the wire and the ground in windy weather and makes it safe for people and animals in the event of a fall. The stitched and crimped layer of polyethylene reduces corona losses and transfer currents during rain and, together with the core, makes the wire resistant to the temperature that occurs during short circuits (up to 30,250oC).

Conducted electromechanical tests of the manufactured wire samples confirmed their suitability for "operation on power transmission lines with a voltage of up to 20 kV, inclusive, at temperatures of -40...-50960.

Sources of information: - 1. Japan's application acc. Мо2895487, МПК НО1В 5/08, declared 04/15/88, published 05/24/99, applicant Rygikaja 79 EIesigis So. YOU p 2. Application of Japan Mo3139267 B2 7262827A, IPC NO18 5/02, filed 03/23/94, published 02/26/01, applicant :z» Niiasnpi Sabie Tsa.

Claims (1)

45 The formula of the invention se) -| A high-voltage safety wire, which consists of a conductive core, which is characterized by the fact that the core additionally contains a layer of polyethylene cross-linked with peroxide or silanol compounds pressed over the core, which perceives the action of high voltage, and the core is made of Fe 50 aluminum alloy wires twisted around of the central steel element and compacted after twisting so that the core and the layer of polyethylene together provide safety against voltage damage, resistance of the wire to tensile forces, bending and short circuit. Su; 60 b5