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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It does not, however, take into account the economic value of consequential losses from system downtime.

Part 4 Electrical and electronic systems within structures This part contains one of the ne critical differences between the two standards. These include risk assessment software to automate the complex and repetitive risk calculations, new technical literature, training seminars and face-to-face assistance. SPDs also provide additional protection over bonding and shielding measures through protection in both common and differential modes.

However, the key principles are well established and pretty familiar to all. Part 3 Physical ej 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.

Lightning protection – Mastering the maze of BS EN

Switches support high performance. In BS a system was used where each down conductor was attached to an earth electrode. 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. For example, consider the mesh sizes for an air termination network and spacing 62305- down conductors in BS EN Gs 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.


A series of trial and error calculations is then required in order that a sufficient level of lightning protection can be defined. 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 fn and exacting than its predecessor.

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BS EN 62305-4:2011

We use cookies to make our website easier to use and to better understand your needs. This ensures equipment is not only protected from damage but also remains operational during lightning activity.

Your basket is empty. It requires the bonding of all metallic services to the main equipotential bonding bar. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Part 1 General principles This is an introduction to the other parts of the standard. In BSa mesh arrangement was the commonly used layout for the air termination network. BS EN came into force on 1 September Search all products by. Electrical and electronic systems within structures Status: The BS British Standard on lightning protection has existed for decades.


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 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.

Lightning and surge protection. You may find similar items within these categories by selecting from the choices below:. If the actual risk R is lower than the tolerable risk RTthen no protection measures are needed.

Customers who bought this product 623005-4 bought BS EN Worldwide Standards We can source any standard from anywhere in the world. For new builds, bonding and screening measures can be integrally designed to form part of the complete lightning protection measures system LPMS. However, BS EN details the use of air rods or finials, catenary or suspended conductors or a meshed conductor network, in any combination.

The existing fabric and layout of a building may make readily apparent zones, or LPZ techniques may have to be applied to create the required zones.

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