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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If R is greater than RT, then sb measures, as determined from the tables given in the standard, are required. Lightning and surge protection. Click to learn more. 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. BS EN contains extensive sections, with 6230-4 explanations on the reasons for, and methodology of, equipotential bonding.

The new standard consists of four parts: 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. BS EN goes further, categorising inspection into visual inspection, complete inspection and critical systems complete inspection, whose frequency depends on the LPL in force. You may experience issues viewing this site in Internet Explorer 9, 10 or Accept and continue Learn more about the cookies we use and how to change your settings.

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.

Search all products by. For example, consider the mesh sizes for an air termination network and spacing of down conductors in BS EN 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.

Worldwide Standards We can source any standard from anywhere in the world. SPDs also provide additional protection over bonding and shielding measures through protection in both common and differential modes.

Lightning protection – Mastering the maze of BS EN

Debut for hybrid system for automotive wn. The first stage of the risk assessment is to identify the types of loss that a structure and its contents can incur. BS EN will take some time for people to fully interpret and comprehend, but by using the resources available, the issues they bw initially encounter certainly can be mastered.


BS EN came into force on 1 September In BS a 62350-4 was used where each down conductor was attached to an earth electrode. At the moment, it runs concurrently with BSbut ultimately BS will be withdrawn and 623054 EN will be the only recognised standard by the end of August Call to action for investment in training.

In BS een, the protection of electronic equipment is only included in an informative annex. These include risk assessment software to automate the complex and repetitive risk calculations, new technical literature, training seminars and face-to-face assistance. Part 3 Physical damage to structures and life hazards The third part of the new standard relates directly to the main body of BSbut there are significant differences between the two.

You vs find similar items within these categories by selecting from the choices below:. The new standard also includes three methods for determining the position of the air termination system: A series of trial and error calculations is then required in order that a sufficient level of lightning protection can be defined.

However, BS EN details the use of air rods or finials, catenary or suspended conductors or a meshed conductor network, in any combination. Your basket is empty. Switches support high performance.

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. BS recommends the inspection of any LPS annually. The existing fabric and layout of a building may make readily apparent zones, or LPZ techniques may bd to be applied to create the required zones.

Expanding on an article in the May issue of Electrical Review John Sherlock be 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 relevant technical advice and support, it can be mastered.


For new builds, bonding and screening measures can be integrally designed to form part of the complete lightning protection measures system LPMS. However, the key principles are well established and pretty familiar to all. Find Similar Items This product falls into the following categories.

Related Articles Be prepared for lightning Lightning Protection – Combined lightning and surge arresters: Learn more about the cookies we use and how to change your settings. Customers who bought this product also bought BS EN The actual risk R is then arrived at through a series of calculations, using formulae in the standard and including various weighting factors.

BS EN 62305-4:2011

Electrical and electronic systems within structures Status: Appropriate SPDs 623055-4 be fitted wherever services cross from one LPZ to another Conclusion So, this brief overview of the new BS EN lightning protection dn clearly demonstrates how it is more complex and exacting than its predecessor. Once the applicable rn of loss have been identified, a tolerable risk RT for each can be looked up in a table contained in the National Annexes.

BS EN contains a series of National Annexes, from which individual countries, like the UK, have used their own interpretation and perception of risk to compile parameters for certain elements of the risk assessment.

However, for an existing structure, retrofitting a set of co-ordinated SPDs is likely to be the easiest and most cost-effective solution.

We use cookies to make our website easier to use and to better understand your needs. Moreover, established suppliers of lightning protection solutions are now offering a wealth of quality support tools.

Lightning Protection – Out with the old, in with the new StrikeRisk for lightning calculations Overvoltage – 623305-4 lightning strikes. When applying bonding, shielding and SPDs, technical excellence must be balanced with economic necessity. Successive e 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.

Structural lightning protection cannot now be considered in isolation from transient overvoltage or surge protection.