Lightning Protection Products
Franklin lightning France
Product No：Pro2009629144755
Product Model：Saint Elme,Saint Elme Active 2D
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Paratonnerres Saint Elme
Le principe de fonctionnement du paratonnerre Saint Elme repose sur la création de charges libres (particules ionisées et électrons) dans le milieu environnant la tête du paratonnerre afin d augmenter la conductivité du milieu et de faciliter la capture de la foudre.La création des charges libres s effectue par effet couronne en appliquant sur la (les) pointe(s) du paratonnerre la tension fournie par des cellules en céramique piézo-électrique dont la propriété est de produire une tension très élevée par une simple modification de pression appliquée.
Le paratonnerre Saint-Elme est muni à cet effet d un dispositif mécanique permettant de convertir l effort résultant de l action du vent sur le paratonnerre en effort de pression sur les cellules piézo-électriques. La tension ainsi fournie est appliquée, via le câble haute tension qui coulisse le long de la hampe, sur la pointe ionisante pour créer, par effet couronne, des charges libres. Ces charges sont ensuite expulsées, par effet Venturi, de la tête du paratonnerre profilée à cet effet.
Le Saint Elme permet donc la protection d un site (bâtiment, usine, monument, zones ouvertes...) contre l impact direct de la foudre sur des grands rayons de protection.
Saint Elme Active 2D Lightning conductors
Principle & operating
A first device, named "impulse device" stores the electrostatic energy present in the atmosphere at the approach of a stormy cloud and releases the excitation of the ascending discharge at the right time.A second device, named "power device", collects and stores the wind and / or the solar energy in several strong power capacitors. The Saint-Elme lightning conductor is in this way permanently pre-loaded of an important energy which enables him to support the propagation of the ascendant tracer.
Close to the storm activity, an integrated sensor measuring the surrounding electric field value, releases the impulse device like most of usual Earlu Streamer Emission systems. Those lightning conductors almost immediately reverse the polarity of their head, creating a sudden amplification of the electrical field.
The innovation of "Saint-Elme Active 2D" Lightning conductor comes from the use of a second integrated sensor which measures the intensity of the electric discharge current, which is formed on the lightning conductor’s head. When the downward leader enters in the protection area of the lightning conductor, the measured current strongly increases. As soon as this current is higher than the characteristic threshold, the power capacitors discharge and release the necessary energy for the propagation of the leader.
In this last device, the lightning conductor’s head acts as a capture device. Therefore, the head is electrically insulated from the ground.
Caracteristics of the Saint-Elme Active 2D lightning conductor
Take in account the energetic information to choose the tracer which can become an ascending tracer.Maintain the propagation of the tracer by discharge of the power device.
Source of energy autonomous and clean
*Solar or wind energy for the "power device"
*Atmospheric electrical field for the "impulse device"
Consider the cloud polarity.
Radius of curve of the head optimize to reduce the corona effect and guarantee the excitation device.
Protection of the electrical part against the rain with a dimensioned flange.
High quality materials, esthetical.
Use of stainless steel to resist against corrosion.
Test
The Saint-Elme Active 2D lightning conductor was tested in the high voltage laboratory Bazet (CEB) in compliance with the NFC 17-102 standard and is subject of tests campaign in situ.The Saint-Elme Active 2D lightning conductor’s exitation advance device has been determinated comparing to a rod of reference obtained in short-circuiting the double device of this lightning conductor.
Saint-Elme Active 2D lightning conductor remote control tester
AFV 0100 TT
The Saint-Elme Active 2D lightning conductor can be tested on site, with its remote control tester (initial checking, periodic checking in compliance with NFC 17-102 and decrees in force, maintenance,...)
Simple and fast, the test does not require any particular operation of dismounting of the lightning conductor and can be done safety from the ground.
Download：
FRANKLIN.pdf 