TW 573R Nouveauté
NormesInternationales : EN 50540
ACSS/TW conductors are made of fully annealed (0-tempered) aluminum trapezoidal wires wrapped around a 7, 19 or 37 wires steel core. In order to avoid any risk of thermal degradation and to enhance resistance against corrosion, steel wires could be coated by Zn-Al Mischmetal alloy or aluminum clad. Several strength grades of steel are available.
The technology is well-known and proven since many years. Nexans can also deliver compatible accessories and provide assistance on site during installation.
The conductor mechanical behavior is governed by the steel core. When operation at high temperature or after first wind or ice loads, the soft aluminum wires will elongate plastically and transfer all the mechanical responsibility to the steel core. In such a way, the conductor will behave according to the thermal expansion coefficient and modulus of elasticity of the core.
ACSS/TW is an ideal conductor for re-conductoring applications. It can double the ampacity of an equivalent ACSR by operating continuously at temperatures up to 250°C (large up-grading), solving emergency situations or even N-2 contingency ratings, minimizing black-out risks due to temporary bottle necks. Also it is a good option to prevent future demand growth or to evacuate energy from distributed new renewable power plants by taking advantage of existing lines without applying for new permissions and maintaining existing structures and corridors.
Additionally, the conductor presents negligible long-term creep and very good self-damping properties. When using a compact design equivalent in area, the resulting ACSS/TW will present lower outer diameter. In such a way, it is possible also to minimize vertical and transversal loads on existing structures due to ice and wind.
Please download document ACSS TW EUROPEAN SIZES for detailed characteristics.
|Nombre de fils aluminium||28|
|Nombre de fils aciers||19|
|Diamètre des fils aciers||2,76mm|
|Surface de l'aluminium ou de l'AGS||460,7mm²|
|Surface de l'acier||113,7mm²|
|Section du conducteur||574,4mm²|
|Résistance ohmique max. du conducteur à 20°C||0,06Ohm/km|