Video signal cable should meet the requirements

April 26, 2023

Video signal transmission cable The video signal transmission cable shall meet the following requirements: Baseband transmission or RF transmission shall be adopted according to the image signal, and the selection of video cable or RF cable shall be determined; the protective layer of the selected cable shall be suitable for the cable laying method and the requirements of the use environment (eg Climatic environment, presence of harmful substances, interference sources, etc.); outdoor lines, coaxial cables with outer conductor inner diameter of 9mm should be selected, and polyethylene jackets should be used; when the indoor distance does not exceed 500m, the outer diameter of outer conductor 7mm coaxial should be selected Cables, and the use of fire-resistant PVC jacket; terminal equipment room between the connection line, a short distance, the outer conductor should be selected with an inner diameter of 3mm or 5mm, and has a copper cable outer conductor coaxial cable; elevator car The video coaxial cable should use the elevator dedicated cable.

Optical fiber cable should meet the following requirements: The transmission mode of optical cable can be determined according to the transmission distance. Single-mode optical fiber should be used for long distances. Multi-mode optical fibers should be used when the distance is short. The number of optical fiber cores should be determined according to the number of monitoring points and the distribution of monitoring points, and attention should be paid to the margin; the structure of the optical cable must be maintained. The allowable minimum bending radius, maximum tensile strength and other mechanical parameters shall meet the requirements of the construction conditions; the protective layer of the optical cable shall be suitable for the laying of the optical cable and the requirements of the use environment.

In recent years, due to the rapid economic growth in emerging Asian countries, the global cable production center has shifted to Asia, driving the rapid development of the cable industry in countries such as China, India, Vietnam, the Philippines and Egypt. At the same time, due to the unification of Europe and relatively low manufacturing costs in Central and Eastern Europe, the wire and cable industry has also grown rapidly. During the "12th Five-Year Plan" period, China's new energy power generation industry will be greatly developed, especially the rapid growth of photovoltaic power generation industry, will inevitably inject new vitality into China's wire and cable industry. Coupled with the introduction of subsidy policies for distributed photovoltaic power generation projects, it is expected that the demand for photovoltaic cables and photovoltaic devices will be boosted.

In the huge domestic and international markets, China's wire and cable companies can only develop and produce products in a targeted manner only if they clearly understand the standards and requirements of each market. For domestic cable manufacturers, the vicious competition in the market, the lack of corporate funds, weak independent innovation capabilities and the lack of brand advantages have become major bottlenecks restricting their development. In order to further enhance the brand's advantages and promote product exports, product certification has been included in the work schedule of more and more cable manufacturers. For cable manufacturers, responding to product standards in different markets is an unavoidable challenge in their business development.

Transmission cable transmission cable attenuation, bending, shielding, moisture and other properties should meet the general requirements of the system design, and meet the technical requirements of the corresponding product standards. Under the premise of meeting the above requirements, cables with fine diameter and easy construction should be selected.

The pressure resistance of the alarm signal transmission line alarm signal transmission line should not be lower than AC250V, and should have sufficient mechanical strength; the minimum cross-sectional area of the copper core insulated conductor and cable core wire should meet the following requirements: the insulated conductor laid through the pipe, the minimum cut of the core The area should not be less than 1.00mm2; the minimum cross-sectional area of the insulated core wire laid in the wire duct should not be less than 0.75mm2; the minimum cross-sectional area of a single core wire of a multicore cable should not be less than 0.50mm2.

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Author:

Ms. Amy

Электронная почта:

amy@ucoax.com

Phone/WhatsApp:

+8613913156783