A Guide to BS EN 62305:2006 Protection Against Lightning Part 6 pps

... main incoming power lines are generallysubstantial enough to carry partial lightning currents,telecommunication lines have significantly smallercross-sectional areas.Taking this factor into ... currents) as well as radiated electromagneticfield effects. BS EN 62 305-4 is an integral part of the completestandard. By integral we mean that following a riskassessment as detailed in BS EN ... within the CENELEC rules.Consequently Annex C was introduced into BS 66 51only as a strong recommendation/guidance measure.As a result protection was often fitted afterequipment damage was suffered,...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 4 pps

... terminationnetworkConnection to air terminationnetworkReference planeCatenary conductors(air termination) BS EN 62 305-3 Physical damage to structures and life hazardh Physical height of catenary conductors above ... be spaced not more than 10m apart and if strike plates are used as analternative, these should be strategically placed overthe roof area not more than 5m apart.As modern research on lightning ... byvertical air rodVertical air rod(air termination)hs BS EN 62 305-3 Physical damage to structures and life hazardIn a non-isolated system, an air rod (or multiple air rods) may be used to protect...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 5 pps

... and SPD selection is given in BS EN 62 305-4 and the relevant section of this guide. BS EN 62 305-3 Physical damage to structures and life hazard BS EN 50 164 -2 is both a design and in parts a performance ... metallicinstallations/parts, such that in the event of lightning currents flowing, no metallic part is at a differentvoltage potential with respect to another. If themetallic parts are essentially ... is a sufficient electricalinsulation distance between the metallic parts canavoid dangerous sparking between different metallicparts. BS EN 50 164 -1 is a performance specification. It attempts...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 10 ppsx

... materials are considered.Suburban environmentArea with a medium density of buildings. ”Town outskirts” is an example of a suburbanenvironment. SurgeTransient wave appearing as overvoltage ... current attains 10% of its peakvalue.Voltage switching type SPDSPD that has a high impedance when no surge ispresent, but can have a sudden change in impedance to a low value in response to a ... (NL)Expected average annual number of dangerous eventsdue to lightning flashes to a service.Number of dangerous events due to flashes to a structure (ND)Expected average annual number of dangerous...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 1 potx

... Lightning 2www.furse.com A Guide to BS EN 62 305:20 06 Protection Against Lightning Author’s noteThe initial reaction from anyone reading, absorbingand comparing this new four -part BS EN 62 305 with BS 66 51 will ... the standard. Part 2: Risk management BS EN 62 305-2 (part 2) risk managementapproach, does not concentrate so much onthe purely physical damage to a structurecaused by a lightning discharge, ... lightning .The approach these new parts impart, are much wider in their view, on protection against lightning, when assessed against BS 66 51. A nearby lightning strike will inject a massive currentinto...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 2 pdf

... later in this guide. One of the first changes to realise is that this newapproach to risk management looks at risk in a farbroader sense than merely the physical damage thatcan be caused to ... method adopted for the implementation ofmanaging risk relevant to lightning protection issignificantly more extensive and in depth thanthat of BS 66 51. Many more parameters aretaken into consideration.Perception ... National Annexes NB, NC, and NH in preference to Annex B, C and H. Additionally Annex NK relates to the inclusion of other nationalparameters and information. These National Annextables are...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 3 pptx

... to BS 66 51 has a flash density map and a worldthunderstorm day's map along with an accompanyingtable. These have been transferred to BS EN 62 305-2,and also illustrated in this guide. ... increasing importance given to the protection against LEMP (Lightning Electromagnetic Impulse),which can cause immeasurable and irreparabledamage (as well as disastrous consequential effects) to ... a 10/350µs waveform) are necessary to divert the partial lightning currents safely to earthand limit the transient overvoltage to prevent possibleflashover. They are therefore an integral part...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 7 doc

... electrodeBondingterminalsLPZ 0BLPZ 0 A Management of an LPMS As detailed in BS EN 62 305-3, there is a requirement to routinely maintain and inspect a structural LPS to ensure its designed mechanical and electricalcharacteristics ... 5.5: Ideal Faraday Cage Lightning currentContinuous metal box- ideal Faraday CageFigure 5 .6: Large volume shield created by metalreinforcement within a structure (BS EN 62 304-4 Figure A. 3)Welded ... of BS EN 62 305-3 details the requirements for the materials and dimensions of electromagneticshields such as metallic cable trays and equipmentenclosures. This is of particular importance at...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 8 ppt

... documentation.The documentation should be continuously updated,particularly to take account of alterations to thestructure that may require an extension of the LPMS.Summary Damage, degradation ... that there are no alterations or additions to an installation, whichmay compromise the effectiveness of the LPMS. Forexample, an electrical contractor may add a powersupply line to external ... location in BS EN 62 305-2.Throughout this example a numerical subscript will beadded to several factors. This subscript will identifythe major risk to which the factors relate. For exampleloss...

A Guide to BS EN 62305:2006 Protection Against Lightning Part 9 docx

... calculated values aresummarised in Table 6. 18.Probability of damage Ascertain the probability of each particular type ofdamage occurring in the structure in accordance withAnnex NB of BS EN 62 305-2. ... givenin tabular form.Collection areas Calculate the collection areas of the structure and thepower and telecom lines in accordance with Annex A of BS EN 62 305-2. The calculated values aresummarised ... any possible flashover in the event of a lightning discharge striking the air rod.In this case there is sufficient space to maintain a separation distance of 1.5m between each air rod andeach...

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