(鐵路用)聚氯乙烯絕緣及護套信號電纜
PVCinsulated and shcathed signal cables for railway
執行標準
Standards implemented
電(D)88-62
用途
Scope of applications
本產品供交流額定電壓250V及以下的鐵路信號聯絡，火警信號，電報及自動機的線路裝置。
This prcduct is intended for signal connection on railway.firesignal,telegraph and wiring for auto-matic mashines with ratedAC voltage up to 25oV.
使用特性
Service sharacteristics
1、電纜在為-40℃~+50℃環境下使用;
2、在環境溫度不低于-50℃的條件下敷設電纜;
3、電纜允許敷設在任何水平差的線路;
1. The cable is to be user with the ambient temperature rangingbetween -40C +50C.
2.The cable is to be laid with the ambient temperature not lowerthan -5℃.
3.Cables are allowed to be laid in lines of any horizontal difference.
結構及主要數據
Structures & major date
1、導電線芯:用直徑1.Omm的軟銅線制成。
2、絕緣:導電線芯用聚氯乙烯絕緣,標稱厚度為0.9mm。
3、成纜:絕緣線芯按同心層式絞合成纜。
4、護套:絞合后的纜芯外包一層聚氯乙烯護套，其厚度按表1規定。
1、Cable core:made from soft copper wire in the diameter of1.0mm.
2、insulation:PvC insulation for the cable core with the nominalthickness of 0.9mm.
3、Finished cable:the insulated core is twisted in homocentriclayer style.
4、Sheath:the core,after being twisted and bounded,shall besheathed with a PvC layer.Refer to table 1 for its thickness.
5、外護層:外護層由墊層、鋼帶和外被層組成。外護層的厚度按表2規定:
5、Outer sheath:the outer sheath consists of inlaid layer,steel tapeａnd outer coating layer.Refer to table 2 for the thickness of theouter sheath.
技術性能
Technical performances
1、導電線芯直流電阻,在溫度+20℃時，每km不大于23.5Q。
2、電纜線芯間絕緣電阻:在溫度+20℃時，每km不小于6OMQ。
3、電纜芯線單芯電容:每km不大于0.3uF。
4、電纜芯線間能承受交流50Hz， 1000V電壓試驗5min。
1、The DC resistance of the conductor at 20℃ is not more than23.5Q per km.
2、The insulating resistance between different cores at 20℃ isnot less than 6OMQ per km.
3、The capacitor of each single core is not more than 0.3 u F perkm.
4、The space between different cores shall be able to withstandvoltage test of AC 50Hz 100ov for 5 minutes.
交貨長度
Length of delivery
電纜交貨長度由雙方協議在合同中規定。如合同中未規定時，對16芯及以下的電纜，交貨長度不小于300m，對16芯以上的電纜，交貨長度不小于250m。允許有長度不小于50m的短段電纜交貨但其數量應不超過交貨總長度的5%。
The length for delivery is to be negotiatoed by both parties.lf notsplecified in the contract,for cables with the number of cores up to16,the length for delivery shall be not less than 30om;ａnd forthose with the number of cores higher than 16,the length fordelivery shall be not less than 250m,short cables with the lengthnot less than 50rn are allowed in delivery,but the quantity shall notexceed 5%of the total delivery.
