Railway signal cable

Railway power cables, also known as railway signal cables, are media for information transmission and are suitable for control circuits with rated voltages of AC 500V or DC 1000V or below to transmit railway signals, audio signals, or automatic signal devices. Among them, composite and aluminum sheathed railway signal cables have certain shielding performance and are suitable for laying in electrified sections 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. This cable has ideal comprehensive performance such as anti attenuation and anti-interference, and can simultaneously transmit high and low frequency railway signals, implementing a multi-purpose cable.

Characteristics of Railway Signal Cable Usage

(1) The ambient temperature for cable use is -40 ℃~+60 ℃; (2) The long-term working temperature of cable conductors should not exceed+70 ℃; (3) The ambient temperature for cable laying: PVC sheathed cables should not be lower than 0 ℃; The polyethylene outer sheath cable should not be lower than -20 ℃; (4) The allowable bending radius of cables: non armored cables should not be less than 10 times the outer diameter of the cable; Armored cables should not be less than 15 times the outer diameter of the cable; (5) The ideal shielding coefficient of the comprehensive sheathed railway signal cable is ≤ 0.8; The ideal shielding coefficient of aluminum sheathed railway signal cables is ≤ 0.3. Cables with a delivery length of 500m or more should not be less than 50% of the total delivery length; The delivery length of short cables ranging from 50 to 250m should not exceed 5% of the total delivery length; The measurement error of cable length should not exceed ± 0.5%. Deliver according to the length agreed upon by both parties.

Development Trends of Railway Signal Cables

At the same time, railway signal cable products also have multiple signal functions such as broadband network, IPTV, transmission telephone, fax, video phone, anti-theft alarm, etc. With the rapid development of intelligent buildings, computer industrialization and Information superhighway projects, people are more demanding and dependent on office informatization and home informatization, and the demand for metal cables will become increasingly high, which is the development direction of metal cables. Since 2011, China has become the world's largest cable manufacturing country and is also known as the country with the fastest growth in global wire and cable consumption. However, it must be noted that the current per capita wire and cable consumption level in China is only one-fifth of that of developed countries, equivalent to the level of Latin American countries, resulting in overcapacity in the domestic cable industry. In the future, with the increasing market demand for railway signal cables, it will greatly drive the development of the domestic cable industry and open up a new world for domestic cable production enterprises.