The whole bundle of cables must be able to withstand all of the forces exerted by the rotation of the gondola. As well as torsion, aspects such as friction between the cables and the fastening of the cables at the top and bottom also need to be monitored. The additional mobile torsion testing system tests six cables at a time over a length of two meters. The torsion of individual cables can be checked without having to worry about the influence of the other cables, weights, and fastenings. The real advantage of this new testing system is its mobility, which allows load tests to be performed under ambient conditions (e.g. hot and cold conditions). Wind turbine manufacturers are increasingly calling for more detailed tests to IEC 60332.3. The cables' flammability properties are checked against the regulations, as are smoke formation, toxicity, and the dripping behavior of materials as they burn. be run on torsionable cables. It has to be possible for cables to be twisted 150° to the right and left at every meter. Tests in a climate chamber These tests are performed at between -40°C and +90°C in a climate chamber, where tests on all cables in the low- or medium-voltage range can be repeated under identical conditions. Tests in a fire chamber Standards in place for cables in wind turbine towers have become more stringent on the basis of current fire safety regulations. Brugg Cables tests all cables in a special fire chamber, consistently ensuring compliance with fire safety standard IEC 60332.1 and IEC 60332.3. The cables' flammability properties are checked against the regulations, as are smoke formation, toxicity, and the dripping behavior of materials as they burn.