■ Replaced steel in electrical tension wires with polymer fiber reinforced material
■ Reduced heat sag tenfold, while increasing power transmission capacity by more than 100%
LS Cable (CEO: Koo Chayol) has developed a next generation tension wire that greatly reduces heat sag while increasing power transmission capacity by more than 100% compared to existing cables.
Tension wires are installed inside power transmission lines to support the weight of the lines as they hang across steel towers. The existing steel tension wires were heavy and experienced thermal expansion, making it difficult to adjust to increasing electricity demand. These weaknesses were both solved when LS Cable introduced fiber-reinforced polymer material in place of steel.
The newly developed product reduces heat sag by tenfold while its weight is only 70% of steel. This allows the transmission capacity of existing power lines to be increased by more than 100% without building new towers, which drastically reduces expansion time and costs.
Also, because the lines undergo less heat sag, electromagnetic waves are high enough from the surface that there is no effect on the human body. The new lines can be used continuously for more than 30 years even at temperatures of 150℃. The product is both environmentally friendly and highly durable.
Park Wan-Ki, head of LS Cable Electric Power Research Institute says: “We are currently testing a next generation power transmission line that uses the new composite material along with XTAL (eXtra Thermal Aluminum Alloy) which was developed last year. We expect to introduce the new power lines early next year. This will improve our competitiveness in the overhead line market, which is currently dominated by a few U.S. and Japanese companies”.