BS EN 62305-4 PDF
BS EN Protection against lightning Part 4: Electrical and electronic systems within structures. BS EN Physical damage to structures and life hazard. Lightning Protection System (LPS). BS EN Electrical and electronic systems within . requirements of BS EN range of standards, the is relatively new and replaced the BS document. Risk Management – Bs EN
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The actual risk R is then arrived at through a series of calculations, using formulae in the standard and including various weighting factors. Part 1 General principles This is an introduction to the other parts of the standard.
Click to learn more. Moreover, established suppliers of lightning protection solutions are now offering a wealth of quality support tools.
LPZ 1 sees limited induced 662305-4 and damped magnetic field whilst LPZ 2 has a further reduction of induced current and further damped magnetic field. BS EN came into force on 1 September Successive zones are therefore characterised by significant reductions in LEMP severity, achieved through a combination of protection measures such as bonding, shielding and the use of SPDs. The BS British Standard on lightning protection has existed for decades.
We ns cookies to make our website easier to use and to better understand your needs. Lightning Protection bx Out with the old, in with the new StrikeRisk for lightning calculations Overvoltage – When lightning strikes. From that risk assessment, a structure may need both a structural LPS and a fully co-ordinated set of surge protection devices SPDs or just overvoltage protection alone.
However, for an existing structure, retrofitting a set of co-ordinated SPDs is likely to be the easiest and most cost-effective solution. It does not, however, take into account the economic value of consequential losses from system downtime.
Customers who bought this product also bought BS EN For example, consider the mesh sizes for an air termination network and spacing of down conductors in BS EN Structural lightning protection cannot now be considered in isolation from transient overvoltage or surge protection. These include risk assessment software to automate the complex and repetitive risk calculations, new technical literature, training seminars and face-to-face assistance.
BS EN 62305-4:2011
BS EN will take some time for people to fully interpret and comprehend, but by using the resources available, the issues they may initially encounter certainly can be mastered.
The existing fabric and layout of a building ns make readily apparent 62305–4, or LPZ techniques may have to be applied to create the required zones. Worldwide Standards We can source any standard from anywhere in the world. So there may be a heavy duty lightning current Type I SPD at the service entrance to handle the majority of the surge energy, plus downstream overvoltage SPDs to protect terminal equipment.
If R is greater than RT, then protection measures, as determined from the tables 623305-4 in the standard, are required. You may experience issues viewing this site in Internet Explorer 9, 10 or However, the key principles are well established and pretty familiar to all.
In BSa mesh arrangement was the commonly used layout for the air termination network. Part 4 Electrical and electronic systems within structures This part contains one of the 6205-4 critical differences between the two standards.
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Lightning protection – Mastering the maze of BS EN
Part 3 Physical damage to structures and life hazards The third part of the new standard relates directly 62305-44 the main body of BSbut there are significant differences between the two. Expanding on an article in the May issue of Electrical Review John Sherlock of Furse pictured rightoffers an overview of the new standard and the consolation that, eh as the new standard may be, its key concepts are not ns, and, with relevant technical advice and support, it can be mastered.
Please download Chrome or Firefox or view our browser tips. Electrical and electronic systems within structures Status: Related Articles Be prepared for lightning Lightning Protection – Combined lightning and surge arresters: However, BS EN details the use of air rods or finials, catenary or suspended conductors or a meshed conductor network, in any combination.
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The new standard also includes three methods for determining the position of the air termination system: BS EN contains a series of National Annexes, from which individual countries, like the UK, eb used their own interpretation and perception of risk to compile parameters for certain elements of the risk assessment.
The new standard consists of four parts: Take the smart route to manage medical device compliance. In BSthe protection of electronic equipment is only included in an informative annex. It requires the bonding of all metallic services to the main equipotential bonding bar.
A series of trial and error calculations is then required in order that a sufficient level of lightning protection can be defined.