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AAC Aluminum Bare Conductor

Release time:2021-05-15

All Aluminum Conductor, Overhead Conductor, AAC & AAAC Cable


Product Description:
Bare wires refer to products with only conductors and no insulation, including copper, aluminum and other metals and composite metal round single wires, stranded wires, flexible wiring, shaped wires and profiles for overhead transmission lines of various structures.
Bare wires are the most basic category of wire and cable products. Some products of bare wires can be used as conductive wires of wires and cables; the other products are used as components in equipment such as motors, electrical appliances, and transformers. In addition, bare wires can be used directly in the power, communications, and transportation sectors to transmit electrical energy and information. Bare wires should have good electrical conductivity and physical and mechanical properties.
Bare wires have only conductors, but no insulation and sheath structure.
Bare wires can be divided into bare copper wires, bare aluminum wires, bare aluminum wires, bimetallic wires, etc. according to their materials. According to the shape and structure, it can be divided into: round single wire, bare stranded wire, soft wiring rain and profiled wire, etc.
The model of bare wire consists of three parts: category, characteristic and derivative.


Electrical performance:
Density@20ºC: 2.703 kg/dm
Temperature coefficient@20°C: 0.00403 (°C)
Resistivity @20°C: 0.028264
Linear expansion coefficient linear rate of change: 23 x10-6 (°C)

Operating conditions:
Ambient temperature: -5°C-50°C
Wind pressure: 80 – 130kg/m2
Seismic Acceleration: 0.12-0.05g
Isokeraunic Level: 10 – 18
Relative humidity: 5 – *

Classification:
(1) According to the classification of conductor materials, there are mainly single metal wires, bimetal wires, alloy wires and so on.
(2) Classified according to structure shape and purpose. Mainly include round single wire, profiled wire, bare stranded wire, flexible wiring, etc.
(3) Classified by processing status. Mainly there are soft wires, hard wires and so on.
(4) The material management department often manages according to the following categories, namely bare copper wire, bare aluminum wire, aluminum stranded wire, steel core aluminum stranded wire, copper row, aluminum row, copper flat wire, aluminum flat wire, tram line Wait.
A bare single wire is a wire with a bare surface and no insulation layer. It is mainly used in the manufacture of electric power, transportation, telecommunications engineering and motors and transformers.
Bare stranded wire is divided into simple stranded wire, combined stranded wire, special stranded wire, multiple stranded wire, braided sleeve, etc. according to its structure.
Profiles and profiles are conductor wires with special shapes or large cross-sections, that is, products with different cross-sectional shapes. Those that are not round are called profiles; products that are not used in larger lengths are called profiles. According to the purpose, it can be divided into three types:
①As a high-current bus. This kind of wire is also called a bus bar. The materials used are copper and aluminum bars. Most of their shapes are flat, and some are made into hollow rectangles and semi-bows. It is used in power plants and substations to transmit large-capacity currents, as well as in switch cabinets. In recent years, insulated busbars with insulating layers have appeared.
② Wire for contact net. This type of wire is used for overhead wires of electrified railways, urban trams, electric locomotives in tunnels (such as subways, underground tunnel cars in mines), etc. Due to the large-scale development of urban rail transit lines and electrified railways, the use of catenary wires (commonly known as tram lines, now referred to as contact lines) has increased exponentially.
In addition to the technical requirements for the contact wire, in addition to good electrical properties, sufficient tensile strength and good weather resistance, its excellent wear resistance is also very important, and excellent wear resistance directly affects its service life.
③ Profiled materials. Special-shaped strips are mainly used for commutator components of various motors, and blade electrodes of various switches and guillotines. Its cross-sectional shape is trapezoidal, unimodal, bimodal, and the material is copper or copper alloy.

Precautions for storage:
(1) Bare wires are afraid of moisture and chemical corrosion. They should be stored in a dry and ventilated warehouse. It is strictly forbidden to store them together with acid-base substances, corrosive solids and gases. The relative humidity in the warehouse shall not be greater than 70%.
(2) Do not overlap unpackaged copper wires and aluminum wires to avoid electrochemical effects and corrosion of aluminum wires.
(3) Bare wires should be protected from mechanical damage during storage and transportation, and various molded wires should be avoided from twisting and folding.
(4) Bare wires packed in coils should be placed upright. When coils of bare wires are stacked, they should be stacked with stows. The height of the stack should be 1.5-2m. The shape of the stack must be neat to avoid collapse. The width is preferably 2 rolls for easy inspection.
(5) Bare wires must be inspected regularly to prevent corrosion and deterioration during storage.