Split phase metal layer of power cable main insulation characteristics

by:AAA     2020-04-11
( Industry news] Split phase characteristics of metal layer of power cable main insulation zhdljyw P & lt; Div> waterproof has been the main research issues in the research and development of wire and cable, after many times and long time of repeated experiments can be found, even if the insulating sheath is not damaged, there will be a certain moisture content or moisture permeability to the cable core. , therefore, is generally believed that in the low voltage cable is applied to the actual life, the improvement of the three core block water cables for three block water single core cable structure is better. < / div> < div> < / div> < Div> we could start with the structure of the medium pressure resistance of water according to the single core cable production, then twisted into cables instead of three single core cable used three core cable. After improvement, the water resistance of cable by the improved water resistance cable resistance effect will be better, and the structure is simple, not only save the water-blocking material and cost, also improve the carrying capacity of cables and heat dissipation ability, on the other hand, the construction of easy fabrication, and easier to install. Prevent moisture into the cable, the most important thing is to keep dry insulation wire core, further extend the service life of the cable. < / div> < Div> high performance phase metal layer of power cable insulation of the main technical indicators: & lt; / div> < div>。 Power line core technical indicators: & lt; / div> < Div> conductor should be in accordance with GB/T in the first or the first kind of metallized or metallized layer annealing copper conductor or aluminum, aluminum alloy conductor, or the first kind of bare copper or metallized layer annealing copper conductor. Insulation, metal shielding ( If any) , cabling, guard ( If any) , armored ( If any) Outside, meet the provisions of the relevant standards of GB/T. < / div> < div>。 Split phase metal protecting layer technical indicators: & lt; / div> < Div> after complete split-phase metal sheath, need to charging test of the cable, test should satisfy: cable filling the kPa dry air or nitrogen, in cable length within h after the pressure equalization, pressure should not be reduced in the cable. < / div> < div>。 Comprehensive cable waterproof technology indicators: & lt; / div> < Div> finished product of cable for hours in the water, then in addition to the insulation under the condition of surface structure, observe the surface should be dry. < / div> < Div> split phase metal protecting layer block water power cable is a simple manufacturing process, performance are excellent, very suitable for the selection of low voltage cable. < /div>
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