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CHARACTERIZATION OF THE THERMAL EXPOSURE IN THE EN 50399 CABLE TEST APPARATUS

机译:EN 50399电缆测试设备中的热暴露特性

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摘要

The EN 50399 cable test is used for classification of cables within the European constructionrnproducts regulation. Means to predict a cables performance in this test, based on material data and smallrnscale test results is of great value for the development of new cable materials. A first step in developing arnprediction tool should be to understand the heat exposure on the cables in the EN 50399 test apparatus.rnThe heat load in e.g. the cone calorimeter is very well characterized whereas for EN 50399 only the burnerrnpower (20.5 kW) is known. In the cone calorimeter the heating is solely by radiation, whereas for the ENrn50399 test a large fraction of the heat exposure depends on feed-back from the cable fire. This paperrnpresents a measuring method for characterizing the thermal exposure inside the EN 50399 cable testrnapparatus without cables and with a cable rated Euroclass Dca. A new instrument for measuring thermalrnexposure simultaneously in several directions was developed for the purpose, and thereby the non-isotropicrnexposure on the cables at different position on the ladder could be investigated.
机译:EN 50399电缆测试用于欧洲建筑产品法规中的电缆分类。基于材料数据和小规模测试结果来预测此测试中电缆性能的方法对于开发新型电缆材料具有重要价值。研发预测工具的第一步应该是了解EN 50399测试设备中电缆的热暴露。锥形量热仪具有很好的特性,而对于EN 50399,仅燃烧器功率(20.5 kW)是已知的。在锥形量热仪中,加热完全是通过辐射进行的,而对于ENrn50399测试,大部分热量的暴露取决于电缆着火的反馈。本文介绍了一种测量方法,用于表征无电缆且电缆等级为Euroclass Dca的EN 50399电缆测试仪内部的热暴露。为此目的,开发了一种同时在多个方向上测量热暴露的新仪器,从而可以研究梯子上不同位置的电缆的非各向同性暴露。

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    SP Technical Research Institute of Sweden, Fire Research, SwedenDepartment of Civil, Environmental and Natural Resources Engineering, Luleå University ofTechnology, Sweden;

    SP Technical Research Institute of Sweden, Fire Research, Sweden;

    Department of Civil, Environmental and Natural Resources Engineering, Luleå University ofTechnology, Sweden;

    SP Technical Research Institute of Sweden, Fire Research, Sweden;

    R2Fire group/UMET – UMR CNRS 8207, Ecole Nationale Supérieure de Chimie de Lille, France;

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