The Lightning Innovation and Research Institute is an integrated department of INDELEC, 100% dedicated to innovation. This forward-looking research team of highly skilled engineers provides INDELEC with undisputed R&D abilities and both internal and external training capabilities on lightning protection management and safety equipment installation.

LiRi - High voltage laboratory France Indelec
LiRi Lab – R&D

High voltage laboratory

The Lightning Innovation and Research Institute LiRi operates a unique equipment: the 1.6 million volts High Voltage Laboratory generates giant electrical arcing of several metres in a highly-secured environment. The lightning conductors triggering times in micro-seconds are recorded and compared to a reference single rod air terminal. The gain measured qualifies the air terminal performance and its compliance to the French and international standards.

According to the NF C 17-102 , September 2011, Annex C standard, the ESE air terminals must be tested in HV Lab (calculation of the advanced triggering time Δt). INDELEC conducted these tests in French independent labs (Renardières HV Lab, Cediver lab in Bazet) as well as abroad (Belgium, Canada, South Korea, China, Czech Republic, India), INDELEC is also conducting tests in its own HV lab in North of France for research and development of new products purposes.

The high voltage laboratory used to assess the PREVECTRON®, contained the following equipment:

  • A direct current generator designed to simulate the ambient atmospheric field during a storm;
  • A surge generator allowing induced rapid stimulation of the pre-strike electric field.

These two generators fed a plate positioned above the air terminal being tested.

HV Lab overview
Marx Generator

Test in HV Lab

The PREVECTRON® air terminal and the single rod used as a reference are positioned one after the other so as to be at the same vertical distance beneath the plate.

The wave generator increases the electric field between the upper plate and the ground. This impulse field superposes upon the permanent field of the D.C. generator. With this set-up a breakdown is produced between the tip and the plate. This breakdown short-circuits the generator leading to the wave form’s returning abruptly to zero. With the single rod, this breakdown is produced in a high «ESingle Rod» field. With a PREVECTRON® lightning conductor however, the breakdown is produced earlier and in a less-intense field (EESE).

The time gained allows the lightning conductor’s effectiveness to be accurately measured

Experience and test in HV Lab- LiRi
In-Situ Tests

Real lightning conditions test campaigns

Since 1993 INDELEC has conducted unrivaled in-situ test campaigns, allowing its engineers to assess the lightning conductors in real lightning conditions.

These test campaigns were originally developed in close cooperation with a team of engineers from the Atomic Energy Commission (C.E.A.), Universities, Research Centers and private partners. These test campaigns provide a wealth of experience in the field of lightning phenomena.

In order to gather as much data as possible, the tests were performed in America, Europe and Asia, with each location providing very different lightning conditions. In 2015, INDELEC inaugurated the new International Lightning Research Center of Jatiluhur – Indonesia.

Test campaigns have provided invaluable data to the Lightning Innovation and Research Institute LiRi engineering team, including :

  • Advanced performance of the Prevectron® through measuring and comparing electrical activity at the tips of various lightning rods.
  • Operation of the Prevectron® triggering system.
  • Confirmation of the Prevectron® robust design by exposing it to repeated discharges.
  • Total reliability provided by the Prevectron® in a wide range of situations, encompassing all types of lightning conditions, including upward & downward lightning strikes and tropical & winter storms.
  • Release of a number of scientific reports in relation to this research.

The PREVECTRON 3® has fully benefited from unique experiences during its development process. Numerous engineering innovations have been totally validated in real lightning conditions.

Discover the Prevectron 3®
Test platform
In Situ Test site
LiRi Campus

Research & Formation

Besides its future technologies engineering and development projects, the Lightning Innovation and Research Institute LiRi is a key player of the international lightning scientific community.

The LiRI scientists regularly release innovative articles during major lightning International Conferences, especially on real lightning test campaign findings, another INDELEC Group unique approach since 1993.

Research & Formation - lightning International Conferences

To address the complexity of the lightning phenomenon, the LiRI has built several training and certification programs. It ranges from the educational program for general public to highly technical engineering courses for construction experts.

The Lightning Innovation and Research Institute LiRi is also involved in French, European and international standard committees, sharing its expertise to keep on improving lightning protection systems safety and performances.

The LiRi Campus engineers are cooperating with National Standard Committees to share their expertise and contribute to the writing of future standards and guidelines.

Training and certification programs by LiRi Campus - Indelec
Lightning research

LiRi Resources

The Lightning Innovation & Research Institute LiRi is today amongst the largest lightning research center.

The LiRi is regularly uploading new articles, videos and links to dedicated websites in order to support international research and global knowledge on lightning.

LiRi is dedicated to improve the lightning phenomenon and physics knowledge, lightning protection good practices as well as research and development of new technologies.

Presentation of LiRi & LiRi Campus - video - Indelec
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