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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Lightning protection – Mastering the maze of BS EN

So there may be a heavy duty lightning current Type I SPD at the service entrance to handle the majority ns the surge energy, plus downstream overvoltage SPDs to protect terminal equipment. BS EN goes further, categorising inspection into visual inspection, complete inspection and critical systems complete gs, whose frequency depends on the LPL in force. Most read Latest news. This simply means a series of SPDs whose locations and LEMP handling attributes are co-ordinated in such a way as to protect the equipment in their environment by reducing the LEMP effects to a safe level.

Customers who bought this product also bought BS EN Appropriate SPDs should be fitted wherever services cross from one LPZ to another Conclusion So, this brief overview of the new BS EN lightning protection standard clearly demonstrates how it is more complex and exacting than its predecessor.

Lightning Protection – Out with the old, in with the new StrikeRisk for lightning calculations Overvoltage – When lightning strikes. Structural lightning protection cannot now be considered in isolation from transient overvoltage or surge protection. However, the key principles are well established and pretty familiar to all. The actual risk R is then arrived at through a series of calculations, using formulae in the standard and including various weighting factors.

LPZ 1 sees limited induced current and damped magnetic field whilst LPZ 2 has a further reduction of induced current and further damped magnetic field. Part 4 Electrical and electronic systems within structures This part contains one of the most critical differences between the two standards.


Once the applicable types of loss have been identified, a tolerable risk RT for each can be looked up in a table contained in the National Annexes. This ensures equipment is not only protected from damage but also remains operational during lightning activity.

This website is best viewed with browser version of up to Microsoft Internet Sb 8 or Firefox 3. It includes many more parameters than BS which devotes 9 pages including figures, whilst BS EN contains some pages.

For new builds, bonding and screening measures can be integrally designed to form part of the complete lightning protection measures system LPMS. Learn more about the cookies we use and how to change your settings. We use cookies to make our website easier to use and to better understand your needs. BS EN contains extensive sections, with detailed explanations on the reasons for, bd methodology of, equipotential bonding. It does not, however, take into account the economic value of consequential losses from system downtime.

Protection levels within a zone must be co-ordinated with the immunity characteristics of the equipment to be protected, ie, the more sensitive the equipment, the more protected the zone required.

Debut for hybrid system for automotive connectivity. In BSthe protection of electronic equipment is only included in an informative annex.

Switches support high performance. However, for an existing structure, retrofitting a set of co-ordinated SPDs is likely to be the easiest and most cost-effective solution. Your basket is empty.

The existing fabric and layout of a building 622305-4 make readily apparent zones, or LPZ techniques may have to be applied to create the required zones. BS recommends the inspection of any LPS annually. However, BS EN details the use of air rods or finials, catenary or suspended conductors or a meshed conductor network, in any combination. 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, complex as the new standard may be, its key concepts are not alien, and, with sb technical advice and support, it can be mastered.


Please download Chrome or Firefox or view our browser tips. A series of trial and error calculations is then required ej order that a sufficient level of lightning protection can be defined. Call to action for investment in training. Find Similar Items This product falls into the following categories.

BS EN 62305-4:2011

At the moment, it runs concurrently with BSbut ultimately BS will be withdrawn and BS EN will be the only recognised standard by the end of August Related Articles Be prepared for lightning Sb Protection – Combined lightning and surge arresters: BS EN came into force on 1 September Click to learn more. You may experience issues viewing this site in Internet Explorer 9, 10 or In BS a system was used where each down conductor was attached to an earth electrode.

The BS British Standard on lightning protection has existed for decades.

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. Successive zones are therefore characterised by significant reductions in LEMP 62305-44, achieved through a combination of protection measures such as bonding, shielding and the use of SPDs.