4. Coordination between surge arresters for energy networks and those for other installations
When a system has been effectively protected, all its inputs are protected by surge arresters to achieve equipotentiality between the structure, its installations and the SPF (the latter may be the structure itself when it is capable of accepting this constraint).
We have seen that it is sometimes necessary to install additional surge arresters close to sensitive equipment. However, this is not always sufficient.
In the case of an installation where the energy network and the telephone network (for example) are not connected to the same earthing system, or when they are connected to the same earthing system but not at the same point, in the event of a lightning strike on one or other of the networks, a high overvoltage can still be generated at the terminals of equipment connected to both networks, such as a modem in the example shown in...
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Coordination between surge arresters for energy networks and those for other installations
Application example
Bibliography
Software tools
JUPITER: lightning risk analysis software in compliance with NF EN 62305-2, SEFTIM, France.
Websites
Lightning Protection Association http://www.apfoudre.fr/
SOS lightning http://seftim.com/?page_id=1405
Standards and norms
- Low-voltage arresters – Part 11: Surge arresters connected to low-voltage systems – Requirements and test methods. - NF EN 61643-11 - 05-2014
This standard covers arresters for low-voltage AC networks. Specific versions for DC applications are under development (IEC 61643-31 for arresters for photovoltaic applications and IEC 61643-41 for other DC applications. In Europe, there is already a standard for...
Regulations
ICPE Order: Order of May 11, 2015 amending a series of ministerial orders to take into account the new nomenclature of classified installations for environmental protection coming into force on 1 er June 2015 as part of the transposition of Directive no. 2012/18/EU of July 4, 2012. This decree imposes lightning risk analyses on certain classified facilities, and depending on the...
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
French manufacturers are members of GIMELEC and IGNES.
Installers are members of the FFIE.
Organizations – Federations – Associations (non-exhaustive list)
GIMELEC – Groupement des industries de l'équipement électrique, du contrôle-commande et des services associés
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