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

... very easy andbecome routine in nature to automatically calculatethe risks R1 and R2. If it is a listed building or has anycultural importance then R3 can additionally becalculated at the ... 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 ... electrical contractor may add a powersupply line to external CCTV cameras or car park lightning. As this line is likely to cross an LPZ, suitable protection measures (eg SPD) should be employed to ensure...

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

... BS 6651 has a flash density map and a worldthunderstorm day's map along with an accompanyingtable. These have been transferred to BS EN 62305-2,and also illustrated in this guide. See ... 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 1 potx

... the standard. Part 2: Risk management BS EN 62305-2 (part 2) risk managementapproach, does not concentrate so much onthe purely physical damage to a structurecaused by a lightning discharge, ... European Union (EU), particularlyrelating to standardisation. Consequently, any BritishStandard now published has to be in commonagreement with its European equivalent.The UK, as far as standards ... lightning .The approach these new parts impart, are much wider in their view, on protection against lightning, when assessed against BS 6651. A nearby lightning strike will inject a massive currentinto...

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

... decided to include an openingparagraph in Annex 'C' which permitted each andevery National Committee to assign relevantparameters most applicable to their country.The BSI technical committee ... These National Annextables are highlighted 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 ... method adopted for the implementation ofmanaging risk relevant to lightning protection issignificantly more extensive and in depth thanthat of BS 6651. Many more parameters aretaken into consideration.Perception...

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

... terminationnetworkConnection to air terminationnetworkReference planeCatenary conductors(air termination) BS EN 62305-3 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 ... 4.17: Application of the protection angle to anisolated free standing mastFigure 4.1 8a: Application of the protection angle method to air rods in a non-isolated systemApplication of protection...

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

... in the event of lightning currents flowing, no metallic part is at a differentvoltage potential with respect to another. If themetallic parts are essentially at the same potentialthen the risk ... basement/ground level and then every 20mthereafter. A sufficient electrical insulation or‘separation’ distance should always be maintainedbetween the appropriate metallic installations/parts.Wherever ... A typical application would bewhen certain metal installations need to be isolatedfrom the nearby external down conductors to preventany potential corrosion cells being created. A sparkgap...

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

... currents) as well as radiated electromagneticfield effects. BS EN 62305-4 is an integral part of the completestandard. By integral we mean that following a riskassessment as detailed in BS EN ... earthing will achieve an area of equalpotential, ensuring that electronic equipment is notexposed to differing earth potentials and henceresistive transients. A “Type B” earthing arrangement ... thereforethreat) to a system compared to an 8/ 20µs waveformwith an equivalent peak current. Equipotential bonding SPDs that are designed to handle such 10/350µs currents are also known asLightning...

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 62305-3, there is a requirement to routinely maintain and inspect a structural LPS to ensure its designed mechanical and electricalcharacteristics ... 5.7shows a large loop area created between power anddata communication cabling.Figure 5.7: Loop areasGood practiceBad practiceArea of loop susceptible to induced voltagePower lineData linePower ... electromagnetic radiation. Powercables can be shielded by metallic conduit or cabletrays, whilst data cables often incorporate an outerbraid that offers effective screening.The screen acts as a...

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

... 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 ... 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 62305-2. ... 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 62305-2. The calculated values aresummarised...

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...

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