railway power cable

Railway power cable is also called railway signal cable. Railway signal cable is the medium of information transmission. It is suitable for the control circuit with rated voltage of AC 500V or DC 1000V and below to transmit railway signal, audio signal or automatic signal device. Among them, the comprehensive sheath and aluminum sheath railway signal cable has certain shielding performance, and is suitable for laying in electrified section or other areas with strong electrical interference. Railway signal cable, including outer protective layer, cable core, as well as wire group and core wire inside the cable core. The core wire insulation layer is a leather/foam/leather structure. The wire group includes at least one shielded quad with a shielding layer, while other wire groups do not have a shielding layer. The cable has ideal anti-attenuation, anti-interference and other comprehensive performance, and can simultaneously transmit high and low frequency railway signals, so as to realize multi-purpose of one cable.

Characteristics of railway signal cable

(1) The ambient temperature of the cable is - 40 ℃~+60 ℃; (2) The long-term working temperature of cable conductor shall not exceed+70 ℃; (3) Ambient temperature of cable laying: PVC outer sheath cable shall not be lower than 0 ℃; The polyethylene outer sheath cable shall not be lower than - 20 ℃; (4) Allowable bending radius of cable: non-armored cable shall not be less than 10 times of cable outer diameter; The armored cable shall not be less than 15 times the outer diameter of the cable; (5) The ideal shielding coefficient of railway signal cable with comprehensive sheath is ≤ 0.8; The ideal shielding coefficient of aluminum sheathed railway signal cable is ≤ 0.3. Cables with delivery length of 500m and above shall not be less than 50% of the total delivery length; The delivery length of short section cable of 50~250m shall not exceed 5% of the total delivery length; The measurement error of cable length shall not exceed ± 0.5%. The goods shall be delivered according to the length agreed by both parties.

Development trend of railway signal cable

Railway signal cable products also have multiple signal functions such as broadband network, IPTV, transmission telephone, fax, videophone, anti-theft alarm and so on. With the rapid development of intelligent buildings, computer industrialization and information highway engineering, people have more demand and dependence on office information and home information. The demand for metal cable will be increasing, which is the development direction of metal cable. Since 2011, China has become the world's largest cable manufacturer and also known as the country with the fastest growth in global wire and cable consumption. However, we have to face up to the fact that China's per capita wire and cable consumption level is only one fifth of that of developed countries, equivalent to that of Latin American countries, resulting in overcapacity in the domestic cable industry. In the future, with the increasing market demand of railway signal cable, it will greatly promote the development of domestic cable industry and open up a new world for domestic cable manufacturers.