Our ESE devices have been tested by various testing facilities around the world. All of our devices have been tested to standard NF C 17-102, a European standard as BS EN-62305 doesn't apply to ESE units.

ESE lab testing

Testing

What have we tested?

All of our ESE devices have been tested for the following:

  • Marking Testing

  • Dimensional Testing

  • Environmental Testing

  • ESE Voltage Withstanding

  • ESE Efficiency - Measuring Early Streamer Emission

  • Wind Resistance Testing

All the tests performed on our devices were to the standard NF C 17-102: 2011 which are the current standards for ESE testing as of this writing (19th January 2021)

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Radius of Protection confirmed by Warwick University

The Rp (Radius of Protection) for our devices has been calculated in accordance with NF C 17-102: 2011 and has been confirmed by Dr. Daniel Peavoy (Ph.D., MMath / Innovation Manager / WMG SME Group) of Warwick University. 

"The calculations were done according to the standard NF C 17-102. The results are presented for the ALPS ESEAT device, using data provided by the company."

Testing and Rp (Radius of Protection) can be seen below:

Read more here
ESEAT Calculations Report from WMG - Edi

ALPS ESE Systems testing

Testing

ESE Voltage Withstanding


"The required current waveform was a 10/350μs pulse with peak current of 100kA and energy of 2.5MJ/Ω in accordance with NF C 17-102 and Lightning Protection Level III as defined in BS EN-62305."

"The samples consisted of a finial, into which the current was injected, the active device (which contained the early streamer emission technology) and the grounding pole, from which the current was extracted. The active device consisted of electronic circuitry that was separated from the finial and the grounding pole via a spark gap. It was checked after each test and found to be still working as intended."

ESE Current Withstanding Test "Four Lightning attractors, provided by Advanced Lightning Protection Systems Ltd were tested with a high energy content current pulse." "The emission technology was still functioning as intended after all tests."




ESE Efficiency - Measuring Early Streamer Emission


"Average values TESEAT and TSRAT and standard deviations σESEAT and σSRAT are calculated.
The tested lighting conductor is an ESEAT if both the following conditions are met:
• TESEAT < TSRAT
• ΣESEAT < 0,8 σSRAT
• TPTS - TPDA > 10 μs"
Testing confirms the ALPS ESE systems are ESEAT devices with advanced triggering times of 35.5 μs and 62.7 μs, with 60 μs being the maximum no matter the test results. View the confirmation of the ESE efficiency here "The tested lightning conductor is an ESEAT. (early streamer emission air terminal) because it fulfills all the conditions stipulated by standard (according to NFC 17-102 / 2011, Annex C, clause C.3.5.2.5)” ESE (early streamer emission) Efficiency testing set-up ESE (early streamer emission) Efficiency testing set-up




Wind Resistance Testing


We know that testing the functionality of our ESE devices was crucial, but we also know that the device will need to be attached to a pole and stand 5 metres above the attachment point. Therefore, we have not only tested the ESE devices themselves but also the structure they will be attached to. The structures were added to a simulation program with all the correct material properties and dimensions input and tested with wind up to 100mph.

● The ESE model was simplified and material properties for stainless steel, structural steel and acetal were applied

● Loads were applied based on an estimated drag coefficient of 0.6

● The model was solved with approx. 40,000 elements in solidworks simulation package

● The results indicate a minimum factor of safety over 2 for winds up to 100 mph

ESE (early streamer emission) model properties ESE (early streamer emission) device wind resistance results




Marking Testing


“Test standard: NFC 17-102:2011, Annex C, clause C.3.1.2”

“Test Procedure: The ESE lightning conductor was identified by the following information indicated on the product.

The checking of the identification of marking was carried out by visual inspection.”

“The test was carried out by rubbing the marking by hand for 15s with a cotton rag dipped in water and for 15s more with a cotton rag dipped in hexane aliphatic.”

“Identification of the marking was according to the requirements of C.2.1.1 of the NFC 17-102.” “After the test, the marking was legible.”

ESE (early streamer emission) device marking after test ESE Device Marking test




Dimensional Testing


"The checking of the dimensional characteristics with their tolerences was carried out according to the manufacturer drawing" "The difference between the measured values and the rated dimensions has complied with the specified deviations"
ALPS ESE 35.5 Dimensions ALPS 60 Device dimensions




Environmental Testing


Advanced Lightning Protection Systems Ltd requested that the Materials and Engineering Research Institute, part of Sheffield Hallam University, perform a corrosion investigation on a lightning protection component using sections described in NFC 17-102– Early streamer emission lightning protection systems, namely C.3.3.1 – Salt mist treatment and C.3.3.2 – Humid sulphurous atmosphere treatment. C.3.3.1 – Salt mist treatment Using the methodology outlined in EN IEC 60068-2-52 2018 standard, except for articles 7, 10 and 11 which were not applicable according to NF C 17-102, a level 2 severity salt mist treatment test was carried out in an Ascott CC450ip salt spray cabinet. C.3.3.2 – Humid Sulphurous Atmosphere Treatment The humid sulphurous atmosphere treatment was performed using the methodology outlined in EN ISO 6988 where the component would be subjected to seven cycles in a sulphur dioxide environment with a concentration of 667 ppm (volume). Each cycle lasts 24 hours and includes an 8-hour heating period at 40°C ± 3°C in a saturated humid environment following a 16-hour exposure to the ambient atmosphere. After this period, the humid sulphide environment was resorted.





Radius of protection

Radius of protection 35.5 μs


ALPS ESE 35.5 Rp (Radius of Protection) The radius of protection Rp of an ALPS ESE is given by the French standard NF C 17-102 (September 2011).

It depends on the ESEAT efficiency ∆T of the ALPS ESE measured in a high voltage laboratory, on the levels of protection I, II, III or IV calculated according to the lightning risk assessment guides or standards (NF C 17-102 annex A or IEC 62305-2, guides UTE C 17-100-2 or UTE C 17-108) and on the height h of the lightning air terminal over the area to be protected (minimum height = 2 m).

The protection radius is calculated according to Annex C in French standard NF C 17-102. For ALPS ESE, the value of ∆T used in the protection radius calculations is 35.5 µs (∆T = T’SRAT – T’ESEAT = 366.9 – 331.4 = 35.5 µs)




Radius of protection 60 μs


ALPS ESE 60 Rp (Radius of Protection) The radius of protection Rp of an ALPS ESE is given by the French standard NF C 17-102 (September 2011).

It depends on the ESEAT efficiency ∆T of the ALPS ESE measured in a high voltage laboratory, on the levels of protection I, II, III or IV calculated according to the lightning risk assessment guides or standards (NF C 17-102 annex A or IEC 62305-2, guides UTE C 17-100-2 or UTE C 17-108) and on the height h of the lightning air terminal over the area to be protected (minimum height = 2 m).

The protection radius is calculated according to Annex C in French standard NF C 17-102. For ALPS ESE, the value of ∆T used in the protection radius calculations is 60 µs (∆T = T’SRAT – T’ESEAT = 358.9 – 296.2 = 62.7 µs) "The maximum value for ΔT, whatever are the test results, is 60 μs."