Close-up Today (NHK)

Juraisin Lightning Protection Systems

For Safety and Peace of Mind

Tel: 81 (28) 224-4475

Fax: 81 (28) 222-6902

Email: info@juraisin.com

Close-up Today: Lightning Panic

NHK Broadcast, September 1995

Electric Facilities Industry Monthly Magazine, November 1997 Edition:
In this publication, it is written that the contents of the NHK program Close-up Today: Lightning Panic (September 20, 1995) had a deep impact on a wide range of individuals, from not only technicians at construction and electric work companies but also building owners.

This chemical plant, located in Fukaya City, Saitama, experienced lightning-related accidents 15 times during the summer alone. Light electrical equipment such as computers, telephones, fire alarms and such were damaged as a result.

This witness from the chemical plant states that a lightning rod was installed on the building next door two years ago and lightning strikes this lightning rod, as he points to the air terminal. He states that lightning does not directly strike the chemical plant. (The two buildings, separated by 80 meters, are not connected by any electricity.)

The Central Research Institute of Electric Power Industry (CRIEPI) conducted an experiment of electromagnetic waves, at their Shiobara Testing Yard, located in Tochigi Prefecture. They used an iron plate and laid a 100Vcable 10 meters away from the iron plate. This cable was connected to a television, for standard TV broadcast viewing.

They utilized artificial lightning to strike the iron plate. Electromagnetic waves dispersed from the iron plate.

The electromagnetic waves entered the 100V cable and a voltage of 2000Ventered the television. Because this television was an old model, the image was disordered but there was no damage by fire. However, had this television been a new model, it goes without saying that the television would have been destroyed.

This experiment used electricity 1/10 the strength of real lightning, so that in the event of a real lightning strike, it can be assumed that the electromagnetic wave would be 10 times as strong. We cannot predict where this electromagnetic wave will travel.