E

ARLY

S

TREAMER

E

MISSION

L

IGHTNING

C

ONDUCTORS

Protection areas

French Standard NFC 17-102 requires that every ESE Lightning conductor first undergo a seriesof high-voltage laboratory tests to determine the gain in triggering time in comparison to a simple rod. The value obtained - referred to as ∆t - equals the average trigger time over a run of 100 electrical discharges in the laboratory, minus a 35% safety margin. This figure is then used to calculate each conductor’s protection area according to the standardized formula. From the outset, INDELEC subjected the PREVECTRON
® 2 to independenttesting in laboratories across France (EDF facility at Renardières & KERI in South Korea). The testshighlighted the advantages of the PREVECTRON & Cediver Laboratory at Bazet) and internationally (Louvain University in Belgium, IREQ in Canada
® 2’s early triggeringsystem compared to a passive rod and allowed each model’s average ∆t value to be measured. The results of the tests have all been approved by the CNRS and are available on request.

Installation

Installation procedure for the PREVECTRON
® 2 is governed by French standardNFC 17-102 and follows a series of simple rules catering for all types of structure: • the tip should be positioned at least 2m above the structure to be protected; • with heights less than 28m, a single down conductor is sufficient(as long as the conductor’s horizontal projection is less than its vertical projection);• the resistance of the grounding system should be less than 10Ω; • PREVECTRON
® 2 activity can be recorded by installing a lightning strike industrial counter;• the PREVECTRON
® 2 has been designed for the most extreme climatic conditions (see theresults of our real-life lightning tests). INDELEC also markets a tester allowing clients to regularly check the air terminal on-site.

TS 2.25 TS 3.40 S 3.40

TS TS

Prevectron

S S

®

ERIES ERIES

2 M

ILLENIUM

Ø 100 mm / H = 330 mm