铁路信号电缆

一、铁路信号电缆：适用于额定电压交流500V或直流1000V及以下传输铁路信号、音频信号或自动信号装置的控制电路，其中综合护套、铝护套铁路信号电缆具有一定的屏蔽性能，适宜于电气化区段或其它有强电干扰的地区敷设。二、使用特性：（1）电缆的使用环境温度为-40℃~+60℃（2 ）电缆导体长期工作温度应不超过+70℃。（3）电缆敷设环境温度：聚氯乙烯外护套电缆应不低于0℃;聚乙烯外护套电缆应不低于-20℃。（4）电缆的允许弯曲半径：非铠装电缆应不小于电缆外径的10倍；铠装电缆应不小于电缆外径的15倍。（5）综合护套铁路信号电缆的理想屏蔽系数≤0.8；铝护套铁路信号电缆的理想屏蔽系数≤0.3三、交货长度500m及以上的电缆应不少于总交货长度的50%;50~250m的短段电缆交货长度应不超过总交货长度的5%; 电缆长度计量误差应不超过±0.5%。根据双方协商规定的长度交货铁路信号电缆规格（4---61）芯X 1.0mm信号电缆型号的识别 1.信号电缆按护套类型包括塑料护套（PTY03、 PTY23）、综合护套（PTYA23、PTYA22）、铝护套（PTYL23、PTYL22）信号电缆；2.信号数字电缆分为塑料护套（SPTYW03、SPTYW23）、综合护套（SPTYWA23）铝护套（SPTYWL23）、内屏蔽（SPTYWP03或SPTYWP23、SPTYWPA23、SPTYWPL23）数字信号电缆。SP-数字信号电缆T-铁路YW-皮-泡-皮物理发泡聚乙烯绝缘P-内屏蔽L-铝护套A-综合护套23-双钢带铠装聚乙烯外护套03-聚乙烯外护套
A, railway signal cable: control circuit suitable for rated voltage of 500V AC or DC 1000V and below transmission of railway signal, audio signal or automatic signal device, wherein the comprehensive sheath, aluminum sheath railway signal cable with shielding properties, suitable for electrified section or other laying area strong interference. Two, the use of characteristics: (1) cable use environment temperature is -40 DEG ~+60 DEG (2) long-term working temperature of cable conductor shall be not more than +70 DEG C. (3) the cable laying environment temperature: PVC outer sheathed cable shall be not less than 0 DEG C; polyethylene cable outer sheath shall be not less than -20 DEG C. (4) allowed bending radius of cable: non armoured cable should be no less than 10 times of cable diameter; armoured cables shall be no less than 15 times of cable diameter. (5) comprehensive sheath railway signal cable ideal shielding factor is less than or equal to 0.8; aluminum sheath railway signal cable ideal shielding factor is less than or equal to 0.3 500m and above three, delivery length of cable shall be not less than the total delivery length 50%; 50~250m short cable delivery length should not exceed 5% of total delivery length of cable length measurement error; should not exceed 0.5%. According to the agreement specified delivery length of railway signal cable specification (4---61) identification of core X 1.0mm signal cable type 1 signal cable to sheath types include plastic sheath (PTY03, PTY23), comprehensive sheath (PTYA23, PTYA22), aluminum sheath (PTYL23, PTYL22) signal cable; 2 digital signal cable is divided into plastic sheath (SPTYW03, SPTYW23), comprehensive sheath (SPTYWA23) aluminum sheath (SPTYWL23), inner shield (SPTYWP03 or SPTYWP23, SPTYWPA23, SPTYWPL23) digital signal cable. SP- YW- T- railway digital signal cable skin foam skin physical foaming polyethylene insulation P- shielding L- aluminum sheathed A- comprehensive sheath steel tape armoured and PE outer sheath of 23- double 03- and PE outer sheath