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

92 Technical Informationwww.leoni-communication-infrastructure.comSmoke densityThe formation of smoke has several un pleasant consequences.On one hand it considerably lowers the visibility in a fire event,thus endangering the people trapped inside closed rooms escapeof and the efforts of the firemen to carry on their rescueand fire fighting actions. On the other hand it produces smokepoisoning because of the carbon monoxide. Regarding the formationof the combustion gases the PVC comes off quite badly.Dangerous level RequirementsHL 1 –HL 2 and HL 3 60 %HL 4 70 %Test standardsIEC 61034-1/-2; BS EN 61034-1/-2; BS 61034-2; VDE 0482-1034-1/-2Test proceduresThe density of smoke emission can be determined by measuringof the light penetrability. Cable samples are lit with alcohol in atest chamber (cubical with an edge length of 3 m). The soformed smoke is uniformly spread by a ventilator and influencesthe light measuring section.The test is considered to be passed when the following lightpenetrability is reached:IEC 61034-2, EN 50268-2 Def.-St. 02-711(ehemals NES 711)3000300010001000UmluftabschirmungConvection shieldUmluftabschirmungConvection shieldLichtempfängerLight receiver3000LichtempfängerLight receiver3000VentilatorVentilatorVentilatorVentilator