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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When applying bonding, shielding and SPDs, technical excellence must be balanced with economic necessity. This ensures equipment is not only protected from damage but also remains operational during lightning activity.

If the actual risk R is lower than the tolerable risk RTthen no protection measures are needed.

It sb the bonding of all metallic services to the main equipotential bonding bar. At the moment, it runs hs with BSbut ultimately BS will be withdrawn and BS EN will be the only recognised standard by the end of August BS EN will take some time for people to fully interpret and comprehend, but by using the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.

BS EN came into force on 1 September The new standard consists of four parts: 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 62305-4:2011

However, for an existing structure, retrofitting a set of co-ordinated SPDs is likely to be the easiest and most cost-effective solution. The first stage of the risk assessment is to identify the types of loss that a structure and its contents can incur. 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.

Related Articles Be prepared for lightning Lightning Protection – Combined lightning and surge arresters: This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.


It does not, however, take into account the economic value of consequential losses from system downtime. So there may be a heavy duty lightning current Type I SPD at sn service entrance to handle the majority of the surge energy, plus downstream overvoltage SPDs to protect terminal equipment.

Take the smart route to manage medical device compliance. A series of trial and error calculations is then required in order that a sufficient level of lightning protection can be defined.

BS EN goes further, categorising inspection into visual inspection, complete inspection and critical systems complete inspection, whose frequency depends on the LPL in force. In BSa mesh arrangement was the commonly used layout for the air termination network. We use cookies to make our website easier to use and to better understand your needs. Protection levels within a zone must be co-ordinated with the immunity bss of the equipment to be protected, ie, the more sensitive the equipment, the more protected the zone required.

Electrical and electronic systems within structures Status: Worldwide Standards We 62350-4 source any standard from anywhere in the world. 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. 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.

Learn more about the cookies we use and how to change your settings. 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. For example, consider the mesh sizes for an air termination network and spacing of down conductors in Bx EN Customers who bought this product also bought BS EN 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.


Lightning protection – Mastering the maze of BS EN

The new standard also includes three methods for determining the position of the air termination system: Debut for hybrid system for automotive connectivity. In BS a be was used where each down conductor was attached to an earth electrode. Structural lightning protection cannot now be considered in isolation from transient overvoltage or surge protection.

For new builds, bonding and screening measures can be integrally designed to form part of the complete lightning protection measures system LPMS. 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 wn, Electrical installations, Climatic protection, 62305–4 conductors, Electrical safety, Telecommunication systems, Buildings, Surge protection, Installation.

Your basket is empty. Please download Chrome or Firefox or view our browser tips. Part 1 General principles This is an introduction to the other parts of the standard.

However, the key principles are well established and pretty familiar to all. Lightning and surge protection.

SPDs also provide additional vs over bonding and shielding measures through protection in both common and differential modes. In BSthe protection ns electronic equipment is only included in an informative annex. It includes many more parameters than BS which devotes 9 pages including figures, whilst BS EN contains some pages.

BS EN contains extensive sections, with detailed explanations on the reasons for, and methodology of, equipotential bonding. Part 3 Physical damage ne 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. 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.