JIS A4201 PDF
May 18, 2020 | by admin
Find the most up-to-date version of JIS A at Engineering Japan’s largest platform for academic e-journals: J-STAGE is a full text database for reviewed academic papers published by Japanese societies. JIS A Protection of structures against lightning (FOREIGN STANDARD). Available for Subscriptions. Content Provider Japanese Industrial Standards.
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Furthermore, we are also actively involved in standardization activities related to lightning protection in groups such as the IEC international standardization committee and the JIS draft-deliberation committee.
We are conducting research and development of surge protective devices, which are indispensable for internal lightning protection systems, as well as research and development of the external lightning protection system introduced in this article. Toshima-ku,Japan Email: Although all of the sidewalls of structures taller than the rolling sphere radius are protected at each of the four protection levels, their lightning-strike risk, i.
Furthermore, we are also developing an External Lightning Kis Design Support System that includes a function for outputting a 2D engineering aa4201 for the external q4201 protection system to the 3D Lightning Protection Diagnosis System.
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Mis in turn requires appropriate lightning protection standards and risk assessment design methods. First, the required level of lightning protection was established, and the occurrence probability of side flashes was calculated for all lightning currents having a probability of a lightning-strike exceeding the lightning current based on each of the lightning protection levels the jos are based on IEC Based on the design decision data shown in Fig.
We were able to reduce the renovation costs by a420 one third compared with a design based on JIS A Next, after taking into consideration the requests of the building owners, the surrounding environments, and the importance of the structures, we checked the validity of our design method. However, the scope of this article focuses on the protection of structures against lightning. Therefore, the importance of high reliability for jjs IP Internet protocol network infrastructure, which supports the progress of our information society, is growing steadily.
He is currently studying lightning protection technology. In one design case, we designed jiss to an existing external lightning protection system using our design method for a structure nearly m high. Conclusion The number of different structures is as large as the number of structures itself because each structure is a unique combination of its internal electrical systems, the function of the structure, and the building’s appearance.
This method can provide designs that are both economical and jus in terms of lightning protection. Therefore, the IP network infrastructure is now more vulnerable to lightning damage, and the problems caused by lightning damage have increased . Therefore, we have developed and used diagnostic tools for the external lightning protection systems of NTT Facilities.
It can then present the analysis results in a 3D visualization. It was also recognized that designs conforming to JIS A As a result, it is easy to determine the protected and unprotected areas of the structure Fig. Currently, he is mainly engaged in solutions engineering for data-center, IT, power source, and lightning protection solutions.
Jls design method for an air-termination system that applies lightning-strike risk assessment and an example of a design case are also described. We would like to emphasize the importance of implementing comprehensive lightning protection that provides not only external but also internal lightning protection. Moreover, the break-in path of q4201 surges is being complicated by the diversification of networks and equipment connection configurations Fig.
He is currently engaged in electrical system design and management. Moreover, each method is regulated according to the protection level.
Design Technology for an External Lightning Protection System for a Telecommunications Building
Hopefully, relevant laws and regulations and various codes and standards will be enacted. This article describes technology for designing an external lightning protection system for a telecommunications building in accordance with the latest international standards for lightning protection.
He moved to NTT Facilities in and worked on a PHS base station construction promotion project and on jia data-center construction task-force.
For example, when the rolling sphere method is selected, the sphere radius is specified as 20, 30, 45, or 60 m, according to the protection level. He is currently engaged in lightning protection solutions. In JIS A Need for risk assessment Although the theory of lightning is being elucidated, complete protection against lightning damage is still difficult to achieve with present technology.
High-speed and dependable access networks using optical fibers are becoming common now, js progress on an information and communications technology ICT society has accelerated.
Lightning protection requires a synthetic measure against the various break-in paths of lightning surges, which are shown in Fig.