低烟无卤高阻燃综合护套铁路信号电缆的研制

Development of Low Smoke Zero Halogen High Flame Retardant Composite Sheath Railway Signal Cable

地铁用综合护套信号电缆一般要求阻燃等级为B类,现在个别大型城市如北京要求阻燃等级为A类。通过改变原来B类电缆结构,在缆芯外绕包陶瓷化硅橡胶复合带,将阻燃内护套改成隔氧套,可以使综合护套信号电缆达到阻燃A类要求。

In general, the comprehensive sheathed signal cable for subways required the flame retardant grade to be Class B.Now, in some large cities such as Beijing, the flame retardant grade is Class A. By changing the original B? type cable structure, wrapping the ceramized silicone rubber composite tape outside the cable core, and changing the flame?retardant inner sheath into an oxygen barrier, the integrated sheath signal cable can meet the flame retardant A requirements.