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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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.
He is currently engaged in lightning protection solutions. The version, JIS A However, the standard has a serious drawback in that it does not take into consideration flashes to sidewalls. As a result, it is easy to determine the protected and unprotected areas of the structure Fig.
Design Technology for an External Lightning Protection System for a Telecommunications Building
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. Consequently, the importance of lightning protection Fig.
Design case using lightning-strike risk assessment. 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. This requires advanced research on risk management technology for lightning nis. Moreover, each method is regulated according to the protection level.
Ver Release | Chex | Construction Drawing Sharing Service
However, the scope of this article focuses on the protection of structures against lightning. He is a member of the Institute of Electrical Engineers of Japan. Diagnostic tools for external lightning protection Various laws and specifications such as those of JIS A Therefore, the importance of high reliability for the IP Internet protocol network infrastructure, which supports the progress of our information society, is growing steadily. He joined NTT in and worked on the maintenance, design, and construction of power equipment.
Various laws and specifications such as those of JIS A High-speed and dependable access networks using optical fibers are becoming common now, and progress on an information and communications technology ICT z4201 has accelerated. When JIS A This method is based on JIS Jls Furthermore, we are also actively kis in standardization activities related to lightning protection in groups such as the IEC international standardization committee and the JIS draft-deliberation committee.
Because of the importance and value of the facilities that we are dealing with and the jjs on society of damage to them, we need to apply lightning protection based on risk management to reduce the potential for damage effectively and economically. In one design case, we designed improvements to an existing external lightning protection system using our design method for a structure nearly m high. Therefore, we have developed and used diagnostic tools for the external lightning protection systems of NTT Facilities.
Design technology for external lightning protection systems Lightning protection requires a synthetic measure against the various kis paths of lightning surges, q4201 are shown in Fig. It was also recognized that designs conforming to JIS A We are conducting research and development of surge protective devices, which are indispensable for internal lightning protection systems, as well ijs research and development of the external lightning protection system introduced in this article.
These technical requirements have become JIS A Points of JIS A revision. You need Adobe Reader 7. Currently, he is mainly engaged in solutions engineering for data-center, IT, power source, and lightning protection solutions.
It is possible to achieve protection by selecting either one of these methods or jid combination of two or all three. Furthermore, we are also developing an External Lightning Protection Design Support System that includes a function for outputting a 2D engineering drawing for the external lightning protection system to the 3D Lightning Protection Diagnosis System.
However, JIS A kis We would like to emphasize the importance of implementing comprehensive lightning protection that provides not only external but also internal lightning protection.
Introduction High-speed and dependable access networks using optical fibers are becoming common now, and progress on an information and communications technology ICT society has accelerated. This in turn requires appropriate lightning protection standards and risk assessment design methods. Lightning protection requires a synthetic measure against the various break-in paths of lightning surges, which are shown in Fig.
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