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 and surge protection. The BS British Standard on lightning protection has existed for decades.
rn The existing fabric and layout of a building may make readily apparent 6205-4, or LPZ techniques may have to be applied to create the required zones. 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.
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. When applying bonding, shielding and SPDs, technical excellence must be balanced with economic necessity.
In BS a system was used where each down conductor was attached to an earth electrode. So there may be a heavy duty lightning current Type I SPD at the service entrance to handle the majority 623055-4 the surge energy, plus downstream overvoltage SPDs to protect terminal equipment. The new standard consists of four parts: If the actual risk R is lower 62305–4 the tolerable risk RTthen no protection measures are needed. If R is greater than RT, then protection measures, as determined from the tables given in the standard, are required.
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 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 sn.
In BSthe protection of electronic equipment is only included in an informative annex. Moreover, established suppliers of lightning protection solutions are now offering a wealth of quality support tools.
Resources bd Waste Strategy release. Call to action for investment in training.
BS EN 62305-4:2011
Worldwide Standards We can source any standard from anywhere in the world. Accept and continue Learn more about the cookies we use and how to change your settings. The new standard also includes three methods for determining the position of the air termination system: The first stage of the risk assessment is to identify the types of loss that a structure and its contents can incur.
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For new builds, bonding and screening measures can be integrally designed to form part of the complete lightning protection measures system LPMS. Electrical and electronic systems within structures Status: However, for an existing structure, retrofitting a set of co-ordinated SPDs is likely to be the easiest and most cost-effective solution.
Most read Latest news. 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 BS EN goes further, categorising inspection into visual inspection, complete inspection and critical systems complete inspection, whose frequency depends on the LPL in force.
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. For example, consider the mesh sizes for an air termination network and spacing of down conductors in BS EN BS EN came into force on 1 September However, BS EN details the use of air rods or finials, catenary or suspended conductors or a meshed conductor network, in any combination.
Lightning protection – Mastering the maze of BS EN
Debut for hybrid system for automotive 6230-54. BS EN contains extensive sections, with detailed explanations on the reasons for, and methodology of, equipotential bonding. Structural lightning protection cannot now be considered in isolation from transient overvoltage or surge protection.
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. BS recommends the inspection of any LPS annually. Related Articles Be prepared for lightning Lightning Protection – Combined lightning and surge arresters: Maintenance, Inspection, Building services, Electromagnetic fields, Test methods, Hazard prevention in buildings, Lightning protection, Electrical equipment, Lightning, Structures, Damage, Electrical protection equipment, Earthing, Electronic equipment and components, Electrical installations, Climatic protection, Lightning conductors, Electrical safety, Telecommunication systems, Buildings, Surge protection, Installation.
Learn more about the cookies we use and how to change your settings. A series of trial and error calculations is then required in order that a sufficient level of lightning protection can be defined. 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. It includes many more parameters than BS which devotes 9 pages including figures, whilst BS EN contains some pages.
However, the key principles are well established and pretty familiar to all. 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.
This ensures equipment is not only protected from damage but also remains operational during lightning activity. Part 1 General principles This is an introduction to the other parts of the standard.
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.