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Find here definitions of specific technical and scientific terms and acronyms.

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There are currently 10 results in this directory beginning with the letter E.
Early Streamer Emission (ESE) lightning rod
Air terminal generating a streamer earlier than a simple rod air terminal when compared in the same conditions (NF C 17 102 : 2011).
Early Streamer Emission Air Terminal ESEAT efficiency (ΔT)
Difference expressed in micro-seconds between the emission time of an ESEAT and an SRAT measured in a laboratory under the conditions defined in this standard (NF C 17 102 : 2011).
Early Streamer Lightning Protection System
System made of one or several Early Streamer Emission rods, conductors and earth terminations to conduct safely the lightning discharge current to the ground and protect the structure, building or open areas against direct lightning hazards.
Earth termination system
Part of an external Lightning Protection System which is intended to conduct and disperse lightning current into the earth.
Electrical / Telecommunication lines
Transmission medium intended for communication / power supply between equipment that may be located in separate structures.
Electrical Field
A field of force surrounding a charged particle within which another charged particle experiences a force.
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Electro-geometric Model (EGM)
Theoretical representation model of the upward streamer development, based on Electrical Field E, height of the lightning rod and intensity of the lightning discharge parameters.
Electromagnetic radiations
Waves of energy traveling around the a lightning discharge and causing overvoltage phenomenon on the neighboring electrical / telecom lines.
Equipotential bonding
Bonding to the ESESystem of separated conductive parts (see 5.5) of an installation, by direct connections or via surge protective devices, to reduce potential differences caused by lightning current. (NF C 17 102 : 2011).
Equipotential bonding main bar
A bar used to connect the natural components, ground conductors, earth conductors, screens, shields and conductors protecting telecommunication cables or other ones, to the lightning protection system. (NF C 17 102 : 2011).
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