The Aerial Bundled Cable series products are composed of pressed copper, aluminum (aluminum alloy) conductors, inner shielding layer, weather-resistant insulating material and outer shielding layer. They have both the power transmission characteristics of power cables and the strong mechanical properties of overhead cables. Compared with bare wires, this product has the advantages of small laying spacing, high safety and reliability, and excellent resistance to atmospheric aging
Uses of overhead insulated cables
Overhead insulated cable products are a new series of products for power transmission through overhead transmission lines, and are preferred for power grid construction and transformation of 10kV transmission lines. It is the most suitable series of products for line maintenance and safety. Soft copper core products are suitable for the lower leads of transformers.
Overhead cable implementation standards
1KV overhead insulated cable: GB12527-90 is equivalent to the International Electrotechnical Commission IEC60502, IEC227;
10KV overhead insulated cable: GB14049-93 is equivalent to the International Electrotechnical Commission IEC60502.
Overhead insulated cable
Third, the characteristics of (ABC) HD 626 S1 Standard
Rated voltage: 0.6/1KV, 10KV;
The long-term allowable working temperature of the cable: 70°C for PVC insulation and 90°C for XLPE insulation.
When short-circuited (the longest time is no more than 5 seconds), the maximum temperature of the cable: 160°C for PVC insulation, 150°C for high-density polyethylene insulation, and 250°C for cross-linked polyethylene insulation;
The ambient temperature during cable laying is not lower than -20℃;
Allowable bending radius of cable:
(1) Cables with rated voltage below 1KV: cable outer diameter (D) less than 25mm should not be less than 4D, cable outer diameter (D) of 25mm and above, should not be less than 6D;
(2) The rated voltage of 10KV cable should not be less than 20 (D+d). Where: D—the actual outer diameter of the cable, d—the actual outer diameter of the cable conductor.
Overhead fixed laying of soft copper core products is used for transformer down-conductor; when laying cables, a certain distance between cables and trees should be considered, and frequent contact between cables and trees is allowed during cable operation.
For overhead fixed laying and cable erection, a certain distance between the cable and the tree should be considered, and frequent contact between the cable and the tree is allowed when the cable is running.
Overhead fixed laying; When installing cables, consider keeping a certain distance between cables and trees. When cables are running, only short-term contact between cables and trees is allowed.