The Introduction of overhead insulated cable

       Principle of overhead insulated cable
　　Overhead insulated cable series products by compression, copper, aluminum, aluminum alloy) conductor, the shielding layer and the corrosion resistance of insulating material and outer shield, both has the transmission power characteristics of the power cable and has stronger aerial cable mechanical performance, compared with the bare wire, this product is equipped spacing is small, high safety and reliability, excellent weathering resistance, etc.

　　Overhead insulated cable application
　　Overhead insulated cable is a new series of electric power transmission products for overhead transmission lines, which is preferred for 10kV transmission lines in power grid construction and renovation. It is the most suitable series of line maintenance and safety products. Soft copper core products are suitable for transformer lower leads.
　　Execution standard of overhead insulated cable production
　　1. 1KV overhead insulated cable: GB12527-90 equivalent to the INTERNATIONAL Electrotechnical Commission IEC60502, IEC227;
　　2. 10KV overhead insulated cable: GB14049-93 equivalent to the INTERNATIONAL Electrotechnical Commission IEC60502.
　　Overhead insulation cable characteristics
　　1. rated voltage: 0.6/1kV, 10KV;
　　2. the cable long-term allowable working temperature: PVC insulation is 70℃, xLPE insulation is 90℃.
　　3. short circuit (the longest time is not more than 5 seconds), the highest temperature of the cable: PVC insulation of 160℃, high density polyethylene insulation of 150℃, crosslinked polyethylene insulation of 250℃;
　　4. The ambient temperature of cable laying should not be less than -20℃;
　　5. Allowable bending radius of cable:
　　(1) Cables with rated voltage below 1KV: the cable diameter (D) less than 25mm shall not be less than 4D; the cable diameter (D) more than 25mm shall not be less than 6D;
　　(2) Rated voltage 10KV cable shall not be less than 20(D+ D). Where: D - actual outer diameter of cable, D - actual outer diameter of cable conductor.

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