June 26, 2012

Since many years it is very popular to shield MV, HV and EHV cables with lead or aluminium or with longitudinal applied glued Al/PE tapes. Based on the growing market demand for alternative solutions for these mentioned technologies, Rosendahl Austria decided to enter this segment of power cable manufacturing equipment.

Rosendahl’smetal tape forming & welding line RN-W gives the possibility to produce cables with better properties like increased mechanical stability, water and/or gas tightness, high pressure resistance, lower weights, smaller dimensions and short current resistance. At the same time this technology is more environmental friendly and more flexible.

The metal sheathing process starts with a tape out of copper, aluminum or stainless steel, which will be applied around a cable core. These tapes will be formed, longitudinal welded and sized. Depending on the requested product design a corrugation process can follow. Big advantage of this solution is the possibility to fullfill plenty different demands (cable designs) with high productivity. In addition to this it is possible to have an “offline” or an “Inline” (combination with the jacketing process) configuration.

Metal tape forming with longitudinal welding gives cable designer’s and cable makers the possibility to serve solutions to the market, which are not available so far or only with limitations. Especially in the field of renewable power generation and transport it’s essential to have new cabling solutions. The target is to serve lighter cables, which fulfill all requirements and specifications. At the same time these cables offer increased flexibility and cross pressure resistance. In the field of land-cables Rosendahl´s RN-W presents an innovative alternative to the commonly known “combined layer technology” where e.g. screen wires and tapes are used. Also in this area the reduction of weight and costs clearly are in favour.