BS 6651 LIGHTNING PROTECTION PDF

Lightning Protection BS – Download as PDF File .pdf), Text File .txt) or read online. Information from Omega Red on British Standards relating to Lightning Protection . Including BS EN , BS , BS EN to BS EN. BS Code of practice for protection of structures against lightning.

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Guidance is provided on how to assess the risk of being struck and how to compile an index figure as an aid to deciding whether a particular structure is in need of protection. Overview Product Details Code of practice for protection of structures against lightning Executive summary Bd of practice for the design of systems for the protection of protectoon against lightning.

Lightning Protection – Out with the old, in with the new StrikeRisk for lightning calculations Overvoltage – When lightning strikes.

BS 6651:1999

LPZ 1 sees limited induced current and damped pightning field whilst LPZ 2 has a further reduction of induced current and further damped magnetic field. The four parts are as follows:. 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.

The BS British Standard on lightning protection has existed for decades. SPDs also progection additional protection over bonding and shielding measures through protection in both common and differential modes.

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.

It is the British edition of the European standard to which all lightning protection systems to new structures, and new extensions to existing ones, are now designed, installed and maintained. BS EN provides the requirements for protection of a structure against physical damage by means of a lightning protection system LPSand for protection against injury to living beings due to touch and step voltages in the vicinity of an LPS.

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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.

Lightning protection – Mastering the maze of BS EN

Read our latest blog post – A brief guide to working from height View blog. It is now recognised that the electromagnetic effects of lightning related activity, and switching events, are the cause of much damage to systems and equipment, with the subsequent loss of critical data.

The actual risk R is then arrived at through a series of calculations, using formulae in the standard and including various weighting factors. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.

Surge protection devices SPDs were not required previously 661 comply with older standards. These include risk assessment software to automate the complex and repetitive risk calculations, new technical literature, training seminars and face-to-face assistance. It requires the bonding of all metallic services to the main equipotential bonding bar.

However, BS EN details the use of air rods or finials, catenary or suspended conductors or a meshed conductor network, in any combination. Search all products by. The new standard consists of four parts: If the actual risk R is lower than the tolerable risk RTthen no protection measures are needed.

The new standard also includes three methods for determining the position of the air termination system: BS recommends the inspection of any LPS annually. However, for an existing structure, retrofitting prootection set of co-ordinated SPDs is likely to be the easiest and most cost-effective solution.

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British Standards – Lightning Protection | Omega Red

For new builds, bonding and screening measures can be integrally designed to form part of the complete lightning protection measures system LPMS. 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.

BS EN contains extensive sections, with detailed explanations on the reasons for, and methodology of, equipotential bonding. 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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BS EN is the latest reference document for protection against lightning. 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. September Replaced By: Omega Brochures Open product brochure Height safety brochure. It does not, however, take into account the pfotection value of consequential losses from system downtime.

You may find similar items within these categories by selecting from the choices below:. Appropriate SPDs should be fitted wherever services cross from one LPZ to another Conclusion So, this brief overview of lightninf new BS EN lightning protection standard clearly demonstrates how it is more complex and exacting than its predecessor.

Switches support high performance. Risk management Part 3: Bw 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.

British Standards relating to Lightning Protection

Please download Chrome or Firefox or view our browser tips. Contact Publications Site Map. Part 1 General principles This is an introduction to the other parts of the standard. We use cookies to make our website easier to use and to better understand your needs. Resources and Waste Strategy release. Customers who bought this product also bought BS 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.

BS EN lightning protection systems comprise external structural and internal surge protection etc. Related Articles Be prepared for lightning Lightning Protection – Combined lightning and surge arresters: