1. Compared with the steel core aluminum stranded wire, the insulated overhead cable has the advantages of small installation distance between cables, reduced space, and high safety factor. 2. Overhead insulated cables are mainly used in the transformation of power grids in cities and forest areas. The product is simple in structure, safe to use, and has excellent mechanical, physical and electrical properties. Excellent resistance to tracking, surface discharge and atmospheric resistance. At the same time, when the overhead cable is used for long-distance power transmission in the suburbs, the cable inductance value is very low, and the line voltage drop is small. Do not increase the boosting measures, which has high economic benefits.
(1) Rated voltage of cable is 10 kV. (2)Max. long - term permissible operating temperature of conductor: Xlpe insulation is 90℃ High density polyethylene insulation 75℃ (3) When short circuit (the longest duration is not more than 5 seconds), the highest temperature of cable: Xlpe insulation is 250℃ High density polyethylene insulation is 150℃. (4) The laying temperature of cable should not be less than -- 20℃ (5) Allowable minimum bending radius of cable: Single core cable: 20 (D+d); Multi-core cable: 15 (D+d); Where: D -- actual outer diameter of cable, mm d -- Actual outer diameter of cable conductor, mm 
