ESE air terminals are externally mounted, proactive, structural lightning protection devices and are designed to activate in the moments directly preceding an imminent direct strike.
The installation of an ESE air terminal combines the best advantages of two systems the direct path to ground of a conventional lightning protection system, and state-of-the-art
ESE technology employed in the ESE internal design. These combined advantages ensure that the ESE provides a secure zone of protection.During thunderstorm conditions, when the lightning down leader is approaching ground level, an upward leader may be created by any level, an upward leader may be created by any surface.
In the case of a passive lightning rod, the upward leader propagates only after a long period of charge reorganization. In the case of an ESE air terminal, the initiation time of an
upward leader is greatly reduced. The ESE air terminal, generates controlled magnitude and frequency pulses at the tip of the terminal during high static fields prior to a lightning
discharge. This enables the creation of an upward leader from the terminal that propagates toward the downward leader coming from the thundercloud.This development of an upward streamer earlier in time and space ensures that the ESE terminal will be the target of the developing lightning strikes. The selection of the ESE model, placement, and mounting height above the protected area is to be done as per the project requirements.
Topbas Grup ESE Terminal has been extensively tested at an independent high-voltage laboratory in accordance with the revised 2011 requirements of French standard NF C 17-102. The testing, as defined in the standard, was designed to simulate naturally occurring conditions and allow comparison of the performance between differing types of lightning protection systems.
The test simulates natural field condition where a field impulse (form the downward leader approaching ground, simulated by a Impulse Generator with along front time) is superimposed onto a permanent field (from the charge between cloud and ground, simulated in the laboratory by a DC generator)The corona at the tip of the rod is measured by a photo-multiplier that enables the the determination of triggering time of both the simple rod air terminal (SRAT) and the ESEAT. The average value is then determined for both a simple rod and the ESEAT. T(SRAT) is then subtracted from T(ESEAT) to achieve the T advantage for the ESE air Termnals.