Definition of wire and cable: wire products used to transmit electrical (magnetic) energy, information and complete electromagnetic energy conversion. In a broad sense, wire and cable is also referred to as cable. The narrow sense of the cable refers to the insulated cable, which can be defined as: a collection of the following parts; one or more insulated cores, and they may have their own cladding, total protective layer and outer sheath, the cable can also have additional conductors without insulation.

A wire and cable in the social development of the important role

Wires and cables are everywhere.

Wire and cable is the blood vessel of industry, the nerve of society, the heart of the motor.

The twenty-first century will be the world of wire and cable.

Second, the primary classification of wire and cable

Wire and cable basics

1. Bare wire and bare conductor products

The primary characteristics of these products are: pure conductor metal, no insulation and sheath layer, such as steel-core aluminum stranded wire, copper and aluminum convergence, electric locomotive line, etc.; processing process is primarily pressure processing, such as smelting, calendering, drawing, stranding / tight pressure stranding, etc.; products are mainly used in the suburbs, villages, user main line, switchgear, etc.

2. Power cables

The main characteristics of these products are: extrusion (winding) of the insulation layer outside the conductor, such as overhead insulated cables, or stranding of several cores (corresponding to the phase, zero and earth lines of the power system), such as overhead insulated cables with more than two cores, or adding a sheath layer, such as plastic/rubber wire and cable. The main process technologies are drawing, stranding, insulation extrusion (wrapping), cable formation, armouring and sheathing extrusion, etc. The different process combinations for various products vary somewhat.

The products are mainly used in the power generation, distribution, transmission, transformation, power supply lines in the transmission of strong electrical energy, after the current is large (tens of amps to thousands of amps), high voltage (220V to 35kV and above).

3. Electrical equipment with wire and cable

The primary characteristics of these products are: a variety of standard complex, wide range of applications, the use of voltage in 1kV and below more, facing special occasions continue to derive new products, such as fire-resistant cables, flame retardant cables, low smoke halogen / low smoke low halogen cables, anti-termites, anti-rat cables, oil / cold / temperature / wear-resistant cables, medical / agricultural / mining cables, thin-walled wires, etc..

C. Bare wire and bare conductor products

1. Definition

Products with only conductors without any insulation layer are called bare wire and bare conductor products.

2. Primary characteristics

Pure conductor metal, no insulation and sheath layer, such as steel-core aluminum stranded wire, copper and aluminum convergence, electric locomotive wire, etc.; processing process is primarily pressure processing, such as melting, calendering, drawing, stranding / tight pressure stranding, etc.; products are mainly used in the suburbs, villages, user main line, switchgear, etc.

3. Contains

(1) Bare single wire: non-ferrous metal round wire, flat wire, tinned wire, bimetallic wire.

(2) bare stranded wire: the primary use as a racking wire: insulation relies on external settlement; the wire itself is not divided into voltage levels! The main aluminum stranded wire, copper stranded wire, aluminum stranded wire, etc., occupying more than 90% of the length of the entire grid line. The main types: LG) I] T LGF-LX, etc.

(3) soft wire and braided wire is a very thin single wire bundle stranded, double stranded or braided system or extremely soft wire, the conductor all with copper. Such as brush wire, battery wire, etc.

(4) type line and profile is not round class conductive products: ① copper and aluminum row material ② contact network conductor ③ various shaped row material.

Fourth, the power cable

1. Introduction

Conductor outside with high-quality insulation structure, and outstanding protection layer of the cable. The main function is the same as the overhead conductor, in the power system for the transmission and distribution of large-capacity electrical energy, the difference is that the power cable can be laid in a variety of occasions, safe shade, not subject to external weather disturbances, less protection, durability, higher costs.

2. Primary characteristics

(1) can accept high, very high operating voltage, with excellent electrical insulation function.

(2) can transmit a large current (hundreds of amps, thousands of amps) with good heat resistance and heat dissipation.

(3) Requires laying in a variety of environments, so there are a variety of structure of the sheath protection.

(4) because of the capacity of the power system, voltage, phase number of different and laying environment changes, so that the variety of power system, the standard is quite a lot.

Five, electrical equipment with wire and cable

1. Characteristics

The most widely used, the most varieties, the largest production volume.

2. Common types

(1) general insulated wire, flexible wire (low-voltage 450/380, CCC certified products)

BV, BLV, BVR, BVV, BLVV, BV-105, BLV-105, BVR-105, RV RVB, RVS, RVV, BX, BLX, BXR, etc.

(2) General Purpose Rubber Cable (Low Voltage 450/380, CCC certified products)

Light type rubber cable YQ YQW Medium type rubber cable YZ YZW Heavy type rubber cable YC YCW.

Sixth, the definition of wire and cable

Wire and cable is used for the transmission of electrical energy, the transmission of signals and the completion of electromagnetic energy conversion of electrical products.

Seven, the classification of wire and cable with the rapid development of society, science and technology continues to progress, the type of wire and cable more and more, now rough statistics have more than a thousand kinds, more than 20,000 specifications. According to the manufacturing process, structural features, functional requirements, the use of products can be divided into five categories 

1, bare wire ---- refers only to the conductor and no insulation layer of the product contains copper, aluminum and other metals and composite metal round single line, various structures of overhead transmission lines with stranded wire, flexible wiring, type line and shape material. The factory's primary production is aluminum stranded wire, steel-core aluminum stranded wire

2, power cable --- power cable is the main line in the power system for the transmission and distribution of high-power electrical wire products. It contains various voltage levels and various insulated power cables from 1-500kV and above. The factory produces PVC insulated power cables and cross-linked polyethylene power cables. 1-35KV

3, electrical equipment with wire and cable - from the distribution point of the power system to directly transmit electrical energy to a variety of electrical equipment, appliances, a variety of industrial and agricultural use of electrical installation lines and control signals with the wire and cable. These products are used in a wide range of types and have to be combined with the characteristics of the equipment used and the environmental conditions to determine the structure and performance of the cable. Therefore, in addition to those many general-purpose products, there are many special special cables The company's primary products are general-purpose insulated wire and flexible wire, general-purpose rubber cable, control wire and cable, marine wire and cable.

4, communication cable and optical fiber cable ---- communication cable is the transmission of telephone, telegraph, television, broadcast, fax, data and other telecommunications information cable. HYVMHYVSYV-75 RF cable originally produced.