Abstract: Recently, "new infrastructure" has become the general trend, and both domestic and foreign countries are vigorously promoting "new infrastructure" projects. In June 2020, the National Development and Reform Commission clarified the scope of new infrastructure, and proposed “to be guided by new development concepts, driven by technological innovation, based on information networks, and facing the needs of high-quality development, to create a foundation for industrial upgrading, integration and innovation. "Facilities System".
"New infrastructure" refers to the construction of new infrastructure, which involves many industrial chains, including: 5G base station construction, UHV, intercity high-speed railway and urban rail transit, new energy vehicle charging piles, big data centers, artificial intelligence, industrial Internet, etc. Large areas. New infrastructure” refers to the construction of new infrastructure.
Extracted from: "White Paper on China City Digital Economy Index (2020)"
It is not difficult to find that the "new infrastructure" is developed around the information network, and the foundation of the information network is precisely the various cables and equipment used for electronic information transmission. How to ensure that the large number of network information transmission cables meet the performance standards and work reliably has become a compulsory course for participants in the "new infrastructure".
As the first CAT8 cable certification device research and development company, Softing's WireXpert series products have been widely used in the cable laying and installation of major subway tracks, data centers, industrial communication networks, and large base stations. As one of the seven fields of "new infrastructure", urban rail transit is the key application field of the Softing WireXpert series of cable certification instruments. For domestic subways, such as: Wuhan subway, Chengdu subway, Nantong subway, Qingdao subway, etc., there are WireXpert series cables in all links of production -> construction (installation and laying) -> completion acceptance -> later maintenance. The figure of the authenticator.
The most important part of the construction and laying of the subway is the laying and installation of cables. If there is a problem in this step, it will cause very serious operation failures. First of all, let's briefly analyze the reasons that may lead to cable performance degradation or even failure:
01, external force damage
A considerable number of cable failures are caused by mechanical damage. For example, non-standard construction during cable laying and installation can easily cause mechanical damage; civil construction on directly buried cables can also easily damage cables in operation. Sometimes if the damage is not serious, it will take months or even years for the damaged part to be completely broken down to form a failure, and sometimes a short-circuit failure may occur if the damage is serious, which directly affects safety production.
02, insulation is damp
This situation is also very common, and generally occurs at the cable joints in direct burial or piping. For example: unqualified cable joints and joints made in humid weather conditions will cause the joints to enter water or water vapor. Over time, water branches will form under the action of the electric field, which will gradually damage the insulation strength of the cable and cause failure.
03, chemical corrosion
The cable is directly buried in the area with acid and alkali, which will often cause the cable armor, lead skin or outer protective layer to be corroded. The protective layer suffers from chemical corrosion or electrolytic corrosion for a long time, which causes the protective layer to fail and reduce the insulation. The cable is faulty.
04, long-term overload operation
Overload operation, due to the thermal effect of the current, the conductor heating will inevitably be caused when the load current passes through the cable. At the same time, the skin effect of the charge, the eddy current loss of the steel armor, and the insulation loss will also generate additional heat, which will increase the temperature of the cable. During long-term overload operation, excessively high temperature will accelerate the aging of the insulation, and even breakdown of the insulation. Especially in the hot summer, the temperature rise of the cable often leads to the first breakdown of the weak insulation of the cable, so in the summer, there are more cable faults.
05, cable connector failure
Cable joints are the weakest link in the cable line, and cable joint failures caused by direct faults (poor construction) by personnel often occur. In the process of making cable joints, if there are reasons such as insufficient joint crimping, insufficient heating, etc., the insulation of the cable head will be reduced, which will cause an accident.
06. Environment and temperature
The external environment and heat source of the cable can also cause the cable to overheat, insulation breakdown, and even explosion and fire.
Although the integrated wiring system has undergone a series of rigorous inspections and passed the tests and put into use, it is inevitable that the network cable performance will decline due to the uncontrollable and unobservable factors mentioned above, and even failures will occur, which will then cause major loss. However, the Softing WireXpert series cable certification instrument is used to test each cable of the integrated wiring system on a regular basis, which plays a precautionary role. When the performance of the cable has declined and has not caused major losses, it can be replaced; if not Perform regular inspections, so that if a fault occurs later, the faulty cable can be quickly detected, replaced in time, and normal communication can be restored to reduce losses.
Below, we will analyze cable performance-related issues through related explanations:
Regarding cable -the cable is damaged due to external forces, such as construction installation or later use suffers from a hard object pressure level, then the cable will lose electromagnetic induction and introduce more noise and crosstalk;
Regarding the connector -unreasonable connector production, construction, and later use, such as not compacted during production, insufficient heating, poor construction, or rough dragging of the cable connector in the later stage, will cause the performance of the connector to decline;
Some people may not understand why cable and connector should be introduced separately, because the certification test of network cable requires the selection of the standard of cable and connector, and the selection of the overall standard of the network cable composed of cable and connector. Perform complete certification tests on network cables.
The Softing WireXpert series of certifiers can perform complete certification tests that meet the standards for network cables, help customers find the problem of the cable and provide a clear overview of the overall parameter test results. The WireXpert series, with a test bandwidth of up to 2,500MHz, is the first cable certification tester that can perform certification tests on the highest performance cable systems in corporate networks and data centers. WireXpert's ease of use and high-speed testing greatly improve the productivity of cable installation. In addition to testing Class FA and CAT 8 copper cables, this tester can also test single-mode, multi-mode and data center dedicated MPO wiring. WireXpert is ready for 40G.
Above, I have explained why the WireXpert series of cable certification instruments will be used in all aspects of production, construction (installation and laying), completion acceptance and later maintenance.
Going back to the big development trend of "new infrastructure", only a stable and healthy foundation can support the intelligent and intelligent development of various industries, and finally achieve the goal of Internet of Everything. Softing will continue to optimize the WireXpert test program and continue to help China Even the world's "new infrastructure".