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History of Company

Hélita:a pioneer company in lighting protection

Market leader on lighting protection since 1932, Hélita immediately made its marks as an innovator with the invention of the first early streamer emission lightning conductor.

HELITA: a world market leader

Active growth
Hélita's professionalism and the reliability of its products make it a well known, highly respected company. It is the world's manufacturer of early streamer emission lightning conductors, and sales are increasing annually by an average of 10 to 15%.

A dynamic export policy
Hélita has established offices in over 60 countries since its creation, and 50% of its turnover now comes from overseas.
Today, over 230.000 Hélita lightning conductors protect its clients against lightning in France and throughout the world.

The lightning protection specialist

The experience Hélita gained in the lightning conductors sector meant that it could quickly develop wide-ranging expertise. From early streamer emission lightning conductors through earth plates and surge arresters to meshed cages, Hélita now offers a complete range of products and services, which meet the respective standards and requirements of the different countries in which its expertise has been recognized. Over 8% of turnover dedicated to research. The study of lightning and new protective methods are a constant preoccupation for Hélita. The company carries out research in its laboratories at Bagnères de Bigorre and also in the field both in France and overseas.

The lightning conductors, a key product: the PULSAR

In 1982, Hélita joined with the University of Haute Alsace and other educational institutions to invent a new generation of lightning conductors: the electric ionizing lightning conductor. In 1984, a research project carried out in conjunction with the CNRS Laboratoire Physique de Décharges (plasma research laboratory) led to another world first: the PULSAR (CNRS/Hélita patent pending in France and worldwide), the first in a new generation of early streamer emission lightning conductors. This conductor, which has been used as a reference ever since, underwent effectiveness tests during its development which are now required standard NF C 17-102.

 

 

1 Direct strike –on the building
2 Indirect strike –on an aerial electric line
3 Indirect strike –through the earthing network

 

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Pulsar

PULSAR, THE HIGH PULSE VOLTAGE E.S.E. LIGHTNING conductor

OPERATING PRINCIPLE
When the lightning approaches the ground, a luminous ascending brush discharge is initiated at the lightning conductor. In the case of a Franklin rod, this ascending brush discharge propagates in the direction of the descending leader after a long transition phase. The Pulsar initiation advance permits to reduce the required time for the formation and continuous propagation of the ascending discharge and brings thus a higher efficiency for the lightning capture than a Franklin rod tip.
AN EFFICIENT INITIATION ADVANCE
Thanks to its initiation advance, the Pulsar emits a high voltage signal at clearly determined and controlled frequency and amplitude. Its effectiveness is guaranteed by the rapid formation and propagation of the upward leader, while reducing the development of space charges around the point.
ENERGY AUTONOMY
The Pulsar is also self-contained. It draws its energy from the ambient electric field existing at the time of the storm (10 to 20 kV/m). The initiation advance starts up as soon as the ambient field exceeds a peak value which corresponds to the minimum lightning stroke risk.

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Operation of a Pulsar

The Pulsar tip plays a triple role:

The metal disc is the upper part of the external air gap designed to convey the lightning current from the tip to the ground. The metal cylinder contains the electric device of the Pulsar system that generates the brush discharges.
The pole serves to fix the Pulsar for installation. The connecting clamp must be fixed to it, together with the down conductor.
 

PulsarBack To Top

 

Research & Development

EFFICIENCY MEASUREMENT PRINCIPLE

The collaboration between Hélita and CNRS also gave birth to a method of test in high voltage laboratory, used as a procedure of evaluation of the Early Streamer Emission air terminals in Appendix C of standard NF C 17-102. The aim of this test procedure is to evaluate the efficiency of an Early Streamer Emission air terminal.

Manufacturing Tests

Each Pulsar unit leaving our workshop undergoes a series of high voltage tests to confirm that the internal insulation voltage is higher than the breakdown voltage of the external air gap of the lightning conductor. All the Hélita production is tested using this method. At the end of the manufacturing process, all Pulsar units undergo a test to check that the lightning discharges will effectively flow to earth. These tests are conducted in the Bagnères-de-Bigorre high voltage laboratory.

Test in high voltage on the Pulsar units

Before delivery, the Pulsar units undergo a further test to check that the characteristics of the high voltage signal - frequency of repetition and amplitude - correspond with Hélita specifications.
 

Installation and verification

The installation and verification of lightning protection systems using one or several Pulsar units must meet the requirements of NF C17-102 and the manufacturer's recommendations.
 

Certifications

 

For more information, please contact us.


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