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
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
PREVECTRON BROCHURE - 18716 TS TS
Prevectron
S S
®
ERIES ERIES
2 M
ILLENIUM
Ø 100 mm / H = 330 mm
