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.
|Published (Last):||22 May 2007|
|PDF File Size:||5.63 Mb|
|ePub File Size:||5.63 Mb|
|Price:||Free* [*Free Regsitration Required]|
When JIS A Design example 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.
Conclusion The number of different structures is as large as the a2401 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.
Toshima-ku,Japan Email: He is a member of the Institute of Electrical Engineers of Japan.
Ver Release | Chex | Construction Drawing Sharing Service
As a result, it is easy to determine the protected and unprotected areas of the structure Fig. It can then present the analysis results in a 3D visualization. Importance of lightning protection. 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.
It was also recognized that designs conforming to JIS A After the technical requirements of JIS A The IEC comprehensively defined lightning protection and risk management for structures and infrastructure services Table 1 —. 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. However, overvoltage resistance, which protects against problems such as lightning surges, is declining in today’s information technology IT equipment, which focuses on high-speed, power-saving, and low-voltage operation.
He is a member of AIJ. Thus, both versions of JIS A are currently still kis legal use, though in practice they cannot be combined. Next, after taking into s4201 the requests of the building owners, the surrounding environments, and the importance of the structures, we checked the validity of our design method. Thus, more effective and economical lightning protection that applies risk assessment on a case-by-case basis, rather than uniform lightning protection, needs to be implemented.
Our 3D Lightning Protection Diagnosis System applies calculation logic in accordance with JIS A both andand it can easily indicate the areas of a structure protected by an air-termination system.
For example, when the rolling sphere method is selected, the sphere radius is specified as 20, 30, 45, or 60 m, according to jjs protection level. However, JIS A 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. He moved to NTT Facilities in Therefore, the IP a42201 infrastructure is now more vulnerable to lightning damage, and the problems caused by lightning damage have increased .
In one design case, we designed improvements to an existing external lightning protection system using our design method for a structure nearly m high. He was a visiting professor at the University of Technology in A420 in and helped to establish the Malaysian standard for lightning protection for IT systems.
Design Technology for an External Lightning Protection System for a Telecommunications Building
This method is based on JIS A Diversification, advanced features, and complexity are being pursued to enable the IP network infrastructure to provide us with greater benefits. NTT has developed and applied a design method that incorporates lightning-strike risk assessment as the design method for air-termination systems of the NTT Group.
He moved to NTT Facilities in and worked on a PHS base station construction promotion project and on a data-center construction task-force. Consequently, the importance of lightning protection Fig.
He has been in his present post since NTT Facilities will continue to develop technology for comprehensive lightning protection that will take into consideration the latest technology trends. Based on the design decision data shown in Fig. Therefore, for an air-termination system, we need a design method that takes into account lightning-strike risk assessment. As the dependence on information and telecommunications increases, companies and society will face a high risk of damage from system failures, and the damage itself could be extremely severe.