本文件给出了用于无卤通信电缆的无卤聚烯烃基护套化合物的具体要求，这些化合物在火灾情况下具有更好的特性。本文件所述化合物通常也称为HFFR或HFFR-LS（无卤、阻燃、低烟），另见EN 50290-2-20。本手册将与EN 50290-2-20、产品标准EN 50288系列、EN 60794系列和其他适用产品标准一起阅读。通过对用于阻燃/阻燃应用的电缆进行特定的防火试验（例如，单芯或成束电缆防火试验），可以证明在火灾情况下性能的改善。在火灾情况下证明特性的附加试验，例如烟雾排放试验，也可能是专用产品标准或规范的一部分。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document gives specific requirements for halogen free polyolefin based sheathing compounds used for halogen free communication cables with improved characteristics in the case of fire.Compounds, described by this document, are commonly also named HFFR or HFFR-LS (halogen free, flame/fire retardant, low smoke), see also EN 50290-2-20.It is expected to be read in conjunction with EN 50290-2-20, the product standards EN 50288 series, EN 60794 series and other applicable product standards.Improved characteristics in the case of fire are demonstrated by specific fire tests on cables for flame/fire retardant applications (e.g. single or bunched cable fire test). Additional tests to prove the characteristics in case of fire, e.g. such as smoke emission test, might also be part of the dedicated product standard or specification.All current amendments available at time of purchase are included with the purchase of this document.