Classified cables from where efforts transmitted low voltage cables (up to 1000 volts) medium volta

Cable is a means of transportation and distribution of power generation areas to consumption areas as the overhead lines and other means of transport capacity. Through the following table will be the work of a comparison between overhead lines and underground cables for power transmission as a means to illustrate the advantages and disadvantages of each.
Used in high efforts
Result in traffic crashes
Classified cables from where efforts transmitted low voltage cables (up to 1000 volts) medium voltage cables (after 1 k. F. until 66 k. Q) high voltage cables (after 66 k. P 132 even k. Q) voltage cables dismutase (after 132 k. P 500 k)
As has been classified cables from the floor, where efforts 3m logo will be transmitted Classification her work in terms of the material used for insulation. Rating of cables where the insulation material used in paper insulated cables saturated with oil (oil shale cables). Cables isolated substance (polyvinyl chloride PVC). Cables isolated textured polyethylene interlaced 3m logo [XLPE]. Cables isolated textured polyethylene [PE]. Cables isolated textured polyethylene rubber [EPR]. 3m logo
And the above is clear to us that the cables are called as the insulation 3m logo material used which indicates the importance of insulation in the cable industry and is the most important components of the cable Due to this importance, it should be available in the insulation material some specifications, taking into account 3m logo that it is difficult for the availability of all the specifications, good insulation properties in one article. Characteristics of foam insulation that have resistance to high quality. Have a high refractive effort. Not accept absorb moisture from the surrounding medium by. Does not react with acids and alkalis in soil. To have property rigidity 3m logo and flexibility together. Not affected or changed components increased temperature resulting from the current maximum of a normal pregnancy or pregnancy or heat produced by the short-circuit current. Does not accept the validity of the fire. Circuit has less possible during operation. Ensure the load voltage safely even higher maximum effort between conductors. Types of insulation material for polyvinyl chloride. Polyethylene. Polyethylene 3m logo interlaced. Polyethylene rubber. Paper saturated with oil. Rubber. Silk and cotton. Varnish. Indian gum.
This is in addition to some other material. As the activity distribution companies is to deliver power to the subscribers of the efforts medium 22.11 k. Q and low 220/380 volts, along with the cables used in the scope of work of the company is low voltage cables PVC polyvinyl chloride. Low voltage cables insulated with paper impregnated with oil (oily). Cables low voltage XLPE insulated cables textured medium voltage insulated with paper impregnated with oil (oily). Medium voltage cables isolated textured XLPE.
The work will be explained and Avi these species with an emphasis on the latter type, a XLPE, which is currently the substitution instead 3m logo of type IV cables, insulated with paper impregnated with oil for the emergence of some defects, which will be clarified later as well. However, it will now be to clarify and explain the types of materials a buffer in terms of the characteristics and advantages and it is PVC. Description material for polyvinyl chloride PVC her resistance high quality. Her effort refraction of up to 1000 volts. Have a characteristic not absorb moisture from the surrounding medium. Inactive chemically inert any "do not react with acids or alkalis." 3m logo Is not affected and does not change its components rising temperature. Have a characteristic hardness and flexibility. Not affected by the solvent or grease. Are not affected by water.
Tested this insulating material was stated this specification because it has substance used in insulation and will be mentioned as a casing for external cables and plastic are also used in the padding of the cables 3m logo isolated textured X. L. P. E notes that it is currently used in water pipes and sewage because of their idle chemical, but it is not used as a buffer, but even effort only 1,000 volts. Different sections of the cables
3 35 + 25 mm 2
3 120 + 70 mm 2
This table shows the different sections and fixed cables for low and medium voltage It also shows the number of filaments of Mosul, 3m logo as well as the diameter of each connector. It is essential that the existing work in the Department of underground cables are aware of these sections and also that it is necessary to be aware of how to identify cross-sectional area of any cable sees whether 3m logo it be through the application of the law of the number 3m logo of capillaries or manner Qatar Mosul or just looking, and this requires a long experience in action. Can see the number of filaments of Mosul during the following law: - * n = 1 + 3 a (a +1)] where n is the number of capillaries and (a) is the number 3m logo of layers If the number of layers (1) the number of capillaries be