I. product definition.
Wires and cables refer to wire products used to transmit electrical energy information and realize electromagnetic energy conversion.
Wire: usually the only metal products and on the conductor coated conductor insulation plus light protection (such as cotton woven layer, fiber glass weaving, plastic, rubber, etc.) of simple structure, smaller diameter is small, use voltage and current of insulated wire, is called the electric wire.
Cable: the conductor and insulation layer, and sometimes with to prevent water invasion in the tight sheath, or also add mechanical strength of the outer sheath, structure is relatively complex, is called a cable sectional area larger products.
Ii. Basic composition.
The wires and cables are composed of the conductor (conductor) insulation layer, shielding, insulated wire core, protective layer and so on. According to the different needs of the wires and cables are according to some or all of the above composition of the integration.
The power supply. Transmission and distribution; Motor, electrical and electrical instrument winding resistance to realize electromagnetic energy conversion; Measuring electrical parameters and physical parameters; Transmission of signals, information and control; Used for sharing antenna television or cable TV systems; Used as a feeder for radio transmitting and receiving antennas or a variety of rf communication and test equipment cables.
4. Performance of wire and cable.
Wire and cable products are used in different situations. Therefore, the performance requirements are very broad in the multi-wire machine, and its main performance is as follows:
1. The electrical
Conductive performance - most products require good conductivity, and individual products require a certain range of resistance.
Electrical insulation - insulation resistance, dielectric coefficient, dielectric loss, electrical resistance, etc.
Transmission characteristics - high frequency transmission characteristics, anti-interference characteristics, etc.
2. Mechanical properties
Refers to tensile strength, elongation, bending, elasticity, flexibility, shock resistance, abrasion resistance and mechanical impact.
3. The thermal performance
Refers to the product of heat resistance level, working temperature with wire and cable to transmit electricity heating and cooling characteristics, load flow, short circuit and overload capacity, thermal deformation and thermal shock ability of synthetic material, material and thermal expansion of the impregnated or drop performance of coating material and so on.
4. Corrosion resistance and weather resistance.
It refers to corrosion resistance, biological and bacterial erosion, chemical resistance (oil, acid, alkali, chemical solvent, etc.) erosion, salt tolerance fog, light resistance, cold resistance, mildew resistance and moisture resistance.
5. Aging performance
Refers to the mechanical stress, electrical stress, thermal stress and other aluminum wire drawing machine under the action of various factors plus, or external conditions, the product and its ability to retain its original properties of materials.
6. Other performance
Including the characteristics of some materials (such as hardness, creep of metal material, the compatibility of polymer material) and some special use of the product characteristics (e.g., don't delay flammability, atomic radiation resistant, insect bites, transmission delay, and energy damping, etc.)
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