Tianjin Cable Railway Communication Cable Tianjin Cable Railway Cable

Tianjin Cable Railway Communication Cable Tianjin Cable Railway CableTianjin Cable Railway Communication Cable Tianjin Cable Railway Cable

roadsignal cableCharacteristic 1: Balancing the transmission of audio signals and fixed railway signals. 2. Excellent anti-interference performance. 3. It can be used separately in single pairs or simultaneously in multiple pairs, and it is particularly excellent for transmitting multiple signals. 4. The use characteristics and structure of partially transmitted power and railway signal cables: 1. Product application scope: This product is suitable for AC rated voltage of 500V or necessary power sources for DC lighting, electric tools, etc. It can also transmit various control signals simultaneously. Transmission of audio signals with a current voltage of 1000V or below, as well as transmission control lines for fixed railway signals and certain automatic devices. 2. Rated voltage: AC 500V, DC 1000V. 3. The maximum allowable working temperature for cable conductors is 70 ℃, and the long-term allowable ambient temperature for cables is -40 ℃~60 ℃. 4. The ambient temperature during cable laying should not be lower than 0 ℃ for poly cables and -10 ℃ for polyethylene sheathed cables. 5. When laying cables, the small bending radius of zui should not be less than 15 times of the outer diameter of the cable. According to the purpose and scope of use of communication cables, it can be divided into six series of products, namely, urban communication cables (including paper insulated urban telephone cables, polyolefin insulated polyolefin sheathed urban telephone cables), long-distance symmetrical cables (including paper insulated high and low frequency long-distance symmetrical cables, copper core foam polyethylene high and low frequency long-distance symmetrical cables and digital transmission long-distance symmetrical cables), coaxial cables (including small coaxial cables, medium and small coaxial cables), submarine cables (which can be divided into symmetrical submarine and coaxial submarine cables), optical fiber cables (including traditional cable type, ribbon array type and skeleton type), radio frequency cables (including symmetrical radio frequency cables and coaxial RF).
Communication cable production plants are distributed throughout the country. In addition to producing long-distance communication cables and local communication cables, China has also made significant progress in the production of fiber optic cables and polyolefin insulated comprehensive protective layer all plastic local communication cables. Many domestic manufacturers and research institutions have introduced technology and equipment from abroad to start production. Every year, a small amount of polyolefin insulated polyolefin sheathed all plastic local telephone cables are sold to Hong Kong, Macau, Southeast Asia, and the Middle East in China.
A communication line consisting of multiple insulated wires or conductors that form a cable core and have a sealed sheath on the outside. Some also have an outer protective layer outside the sheath. There are various laying methods such as overhead, direct burial, pipeline, and underwater. Divided by structure into symmetrical, coaxial, and composite cables; Divided by function into field and permanent cables (underground and submarine cables). Communication cables have a wide transmission frequency band, large communication capacity, and are less susceptible to external interference, but are not easy to maintain.
Cables for communication, television and radio programs, data, and other electrical signals. It is made up of twisted wires that are mutually insulated from each other. Compared with overhead open lines, communication cables have the advantages of large communication capacity, high transmission stability, good confidentiality, and less susceptibility to natural conditions and external interference