电线电缆英语课程 中文翻译.docx

1、电线电缆英语课程 中文翻译 Introduction Electric wire and cable is an important material necessary for power transmission, message delivering and production of various kinds of electric machines and apparatuses. The electric power transmitted from the power station is supplied through overhead power transmission

2、 line and power cable connected to distribution substation at different voltage to power users in factories and mines, as well as in urban and rural residence areas. Within factories and mines, by means of bus bar, overhead power transmission line, power cable, insulated cable and different connecti

3、on wire, the power is supplied to each electric equipment and apparatus in the workshops and mine areas. A series of electric wires and cables, connecting the power station, distribution substation and all power users together, forms the power transmission and distribution system, or the power syste

4、m. At the same time, different kinds of high, low frequency telecommunication cables, local telephone cables, optical fiber cables, TV broadcasting and control signal lines which transmit different communication signal energy between areas of the country, users and within each user, form the communi

5、cation signal transmission system. In a word, electric wires and cables are absolutely necessary in areas where the power is produced and used. With the rapid development of electrification and automation, electric wire and cable is playing an increasingly important role in the construction of natio

6、nal economy and national defense industry. At the end of the thirties of last century, China had introduced the cable manufacturing technology and equipment from the UK, and since the eighties, China has introduced a great number of cable manufacturing technology and equipment from abroad, creating

7、favorable conditions for the leap of its cable industry.Lesson OneThere are many kinds of electric wires and cables. Based on the properties, constructions and manufacturing technologies, in combination with their specialties in use, all the electric wires and cables can be divided into five categor

8、ies.A. Bare wire and bare conductor products: These are the conductors without insulation, including copper, aluminum and composite metal round individual wires, overhead power transmission stranded conductors with different construction, flexible wires, shaped conductors and profiles.Reference to c

9、ompanys catalog Bare wire (overhead conductor): All Aluminum Stranded Conductor (AAC), Aluminum Conductor Steel Reinforced (ACSR), All Aluminum Alloy Conductor (AAAC), Aluminum Alloy Conductor Steel Reinforced (AACSR), Stranded Aluminum Clad Steel Conductors, Aluminum Conductor Aluminum Clad Steel R

10、einforced (ACSR/AW) and Aluminum Alloy Conductor Aluminum Clad Steel Reinforced.B. Magnetic wires: These are the wires which can produce the magnetic field by means of electric current, including enamel wires, fiber winding wires and inorganic insulated wires.C. Power cables: These are the cables us

11、ed in main lines of power system for the power transmission and distribution, including 1 kV to 330 kV and above power cables with different insulations.Reference to companys catalog Power cable: PVC Insulated Power Cable, XLPE Insulated Power Cable, Overhead Cable and Underground Distribution Cable

12、 (URD).D. Communication wires and cables: These are the cables used for transmission of various voice frequency and above telecommunication messages, including local telephone cable, long distance symmetrical communication cable, coaxial communication cable and optical fiber cable. Optical fiber cab

13、le was proved to be a major breakthrough in telephone communication. The laser was first produced by scientists in 1960. Instead of using light to see by, telephone researchers were thinking of ways to use light to communicate by, in other words, they are thinking of using light in the same purpose

14、as radio waves are now used to transmit telephone calls, television programs and data messages.E. Electric equipment wires and cables: These are the electric wires and cables, which supply the power from the distribution point of power system to the power line of various electric equipment and appar

15、atus, including rubber sheathed flexible cables, control and signal cables, automobile wires, locomotive wire and cables, mining cables, shipboard cables and oil well logging cables. Reference to companys catalogue: Rubber Insulated Cables, Shipboard Cable, Building Cable and Control Cable.Lesson Tw

16、o Various Properties of Electric Wires and CablesElectric wires and cables are used in different situation, consequently, the requirement for their properties is also many-sided and extremely wide. Generally speaking, their main properties can be summarized as follows:1. Electrical propertyConductiv

17、e property- Most of the products are required to have good conductive property, a few of them are required to have certain resistance range.Electrical insulating property- Insulation resistance, dielectric constant, dielectric loss, voltage withstand property. Transmission property- It means high fr

18、equency transmission property, anti-interference property.2. Mechanical property- It means tensile strength, elongation, bending property, elasticity, flexibility, vibration strength, abrasion resistance, impact resistance.3. Thermal property- It means products thermal rating, operating temperature,

19、 heating and heat dissipation property of power transmission wires and cables, current capacity, short current and over load ability, hot deformation resistance and heat shock resistance of synthetic material, thermal expansion of material and dripping property of coating material and impregnation m

20、aterial. 4. Corrosion resistance and resistance to weathering- It means electrical corrosion resistance, resistance to biological and bacteria corrosion, resistance to chemicals corrosion (oil, acid, alkali, chemical solvent), salt resistance, light resistance, resistance to cold, mold resistance an

21、d moisture resistance.5. Aging property- It means mechanical stress, electric stress, thermal stress and the products and their composition materials ability to keep their original properties under the influence of foreign factors and environmental weather condition.6. Other property- It means physi

22、cal properties of material (such as metals hardness, creepage, compatibility of high molecular material) and some special characteristics of products in use (such as flame-retardant property, radiation resistance, insect proof, delay transmission and energy damping).Lesson ThreeThe Features in the P

23、roduction of Electric Wire and Cable (1)In order to improve products quality and develop new products, the features in the production of electric wire and cable should be fully considered. These main features are:1. Large consumption, great variety and high requirement of raw materials. The improvem

24、ent of properties of electric wire and cable, and the development of new products are closely related to the selection of appropriate raw materials and the development and improvement of raw materials.2. Wide range of technologies, great number of special equipment. The production of electric wire a

25、nd cable involves many kinds of professional technology, the production equipment is mostly special. The use of proper equipment and technological conditions and strict technological control in different production links are playing key role in increase of products quality and output.3. Distinct con

26、tinuity of manufacturing processes. The manufacturing processes of electric wire and cable are mostly continuous, so, it is necessary to design a reasonable production scheme and technological layout to coordinate production plans of different operations, as well as to strengthen the intermediate qu

27、ality control of semi-finished products in different operations. These measures are of great importance to assurance of products quality, reduction of waste and increase of productivity.Lesson FourThe Features in the Production of Electric Wire and Cable ()1. Large consumption of raw materialI dont

28、think you know how many tons of copper are used by cable factories in China.I dont think you know how many cable factories in China.I dont think you know how many tons of copper are imported yearly by cable factories in China.The answers are:3,000,000 tons of copper are used yearly by cable factorie

29、s in China.There are about 50 big-sized cable factories and about 4000 small-sized and middle-sized cable factories.One million tons of copper are imported yearly by cable factories in China. We can see from these numbers how astonishing is the copper consumption by the electric wire and cable produ

30、cts, meanwhile, copper is just one of the main raw materials used by the electric wire and cable. Except copper, there is a great deal of raw materials used by the electric wire and cable. There is a big-sized cable factory, its yearly turnover is 5 billion Yuan, yearly copper consumption is 50,000

31、ton, and now each ton of copper costs 60,000 Yuan, in total 3 billion Yuan, it is the 60% of its total turnover. In addition to this, its yearly plastics and rubber consumption is 5000 ton, each ton costs 10000 Yuan, in total 50 million Yuan, it is the 10% of its total turnover. Of course, there are

32、 a lot of other raw materials, such as aluminum, steel, tin, glass-fiber tape and chemical materials. According to a conservative estimate, the cost of raw materials shares 90% in the cost of electric wire and cable.It is no exaggeration to say that electric wire and cable is a kind of material intensive product. Because of using a great quantity of raw materials the price of electric wire and cable mainly depends upon the cost of raw materials. On the other hand, electric wire and cable is also a kind of labor intensive product due to its numer