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 State of Standard JIS A

Lightning protection requires a synthetic measure against the various break-in paths of lightning surges, which are shown in Fig. Our design procedure was as follows. Therefore, we designed the air-termination system using our method. 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 details are based on IEC He has been in his present post since It was also recognized that designs conforming to JIS A 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.

Design method using lightning-strike risk assessment. 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.

He is currently engaged in lightning protection solutions. If Adobe Reader is not installed on your computer, click the button below and go to the download site.


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. He is currently engaged in electrical system design and management. He was a visiting professor at the University of Technology in Malaysia 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

Thus, to determine the protected area of a structure, we need a design that provides a more complex calculation and intricate operation than that provided by only the protection angle method 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 society has accelerated. However, the standard has a serious drawback in that it does not take into consideration flashes to sidewalls. The version, JIS A Design case using lightning-strike risk assessment.

In one design case, we designed improvements to an existing external lightning protection system using our design method for a structure nearly m high. Although the theory of lightning is being elucidated, complete protection against lightning damage is still difficult to achieve with present technology. This method is based on JIS A He moved to NTT Facilities in and worked on a PHS base station construction promotion project and on a data-center construction task-force.

He is a member of AIJ.

Then, based on the results, the lightning-strike probability and the economic efficiency were weighed for designs with the following bases: 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.


He moved to NTT Facilities in He is currently studying lightning protection technology.

JIS A – Wikidata

Diversification, advanced features, and complexity are being pursued to enable the IP network infrastructure to provide us with greater benefits.

The IEC comprehensively defined lightning protection and risk management for structures and infrastructure services Table 1 [2]—[5].

Because of the importance and value of the facilities that we are dealing with and the impact 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.

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. These technical requirements have become JIS A Therefore, we have developed and used diagnostic tools for the external lightning protection systems of NTT Facilities.

We were able to reduce the renovation costs by about one third compared with a design based on JIS A In JIS A Diagnostic tools for external lightning protection Various laws and specifications such as those of JIS A