Concentrated Solar Power, Getting to the heart of energy - LEONI

90 Technical Informationwww.leoni-communication-infrastructure.comHalogen freeThe halogens are the elements of the 7th group in the PeriodicTable of Elements:Chlorine (Cl)Fluorine (F) Bromine (Br)Iodine (I)Halogen free cables must be free of chlorine, fluorine andbromine (PVC cables contain halogen, PVC = Polyvinylchloride).The halogens are an integrated component of many acidsHClHF= Salt acid (hydrochloric acid)= HydrogenfluoridHBr = HydrogenbromidTest procedures1000 mg of the testing material must be fixed at one terminationof an annealed copper wire in a gas flame. The material is consideredto be halogen free if no green to blue-green flame discolourationoccurs. The chlorine and the bromine would cause sucha discolouration, however the existence of fluorine cannot beproven like that.Test standardsIEC 60754-1; BS EN 50267-2-1; VDE 0482-267-2-1The most popular plastic containing halogens is PVC (polyvinylchloride).In case of fire or at high temperature PVC starts todegradate. Hydrochloric acid and other fission products are generatedand leads to extremely aggressive corrosion. Thereforethe current trend is to replace the halogen containing plasticswith halogen free ones. For instance PVC is currently being replacedat a large scale with polyolefin i.e. polyethylene. Thanksto halogen free cables the formation of corrosive and toxic gasescan be prevented.ProbeTesting material