A Guide to BS EN 62305:2006 Protection Against Lightning Part 2 pdf
A Guide to BS EN 62305:2006 Protection Against Lightning Part 2 pdf
... IVCurrent permode (kA) 25 18.75 12. 5 12. 5Table 2. 3: Current capability of lightning current SPDsbased on 10/350µs waveform 21 www.furse.com BS EN 623 05 -2 BS EN 623 05 -2 Risk management BS EN 623 05 -2 ... 1 and LPZ 2 must respect safety distances ds BS EN 623 05 -2 | Perception of risk 22 BS EN 623 05 -2 Risk managementwww.furse.com BS EN 623 05 -2 is key to the correctimplementation of BS EN 623 05-3 ... management looks at risk in a farbroader sense than merely the physical damage thatcan be caused to a structure by a lightning discharge. BS EN 623 05 -2 Risk management BS EN 623 05-1 | Type of loss14www.furse.comType...
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A Guide to BS EN 62305:2006 Protection Against Lightning Part 1 potx
... the standard. Part 2: Risk management BS EN 623 05 -2 (part 2) risk managementapproach, does not concentrate so much onthe purely physical damage to a structurecaused by a lightning discharge, ... Lightning 2 www.furse.com A Guide to BS EN 623 05 :20 06 Protection Against Lightning Author’s noteThe initial reaction from anyone reading, absorbingand comparing this new four -part BS EN 623 05 with BS 6651 will ... 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...
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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 623 05 -2, and also illustrated in this guide. See ... flash density map 28 www.furse.com BS EN 623 05 -2 Risk managementFigure 3.5: UK lightning flash density map (BS EN 623 05 -2 Figure NK.1) 27 www.furse.comFlash density | BS EN 623 05 -2 Flash densityClearly, ... structureUndergroundserviceOverheadservice A mHcHb1:3 BS EN 623 05 -2 | Collection area BS EN 623 05 -2 Risk management(3.18)(3.19)(3 .20 )Figure 3.4: Collection areasALic= 25 ρ(3 .21 ) BS EN 623 05 -2 | UK lightning flash...
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A Guide to BS EN 62305:2006 Protection Against Lightning Part 4 pps
... 40.9 22 .4 29 .0 14.3 27 47 .2 29.1 39.8 22 .4 27 .5 13.9 28 46.4 29 .4 38.7 22 .4 25 .9 13.4 29 45.6 29 .6 37.7 22 .3 24 .4 12. 930 44.8 29 .8 36.7 22 .3 22 .8 12. 231 44.1 30.0 35.7 22 .2 32 43.3 30.1 34.7 22 .133 ... 15.4 22 .8 8.4 21 52. 3 27 .2 46.6 22 .0 36.3 15.4 22 51.3 27 .6 45.5 22 .1 34.8 15.3 23 50.5 27 .9 44.3 22 .2 33.4 15.1 24 49.6 28 .3 43.1 22 .3 31.9 14.9 25 48.8 28 .6 42. 0 22 .4 30.5 14.7 26 48.0 28 .9 ... 29 .3 27 .3 52 28.5 26 .953 27 .8 26 .454 27 .1 25 .955 26 .4 25 .356 25 .7 24 .857 24 .9 24 .2 58 24 .2 23.659 23 .5 23 .060 22 .8 22 .3Angle (deg)Height(m)Radius (m) BS EN 623 05-3 | Mesh method50www.furse.comThe...
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A Guide to BS EN 62305:2006 Protection Against Lightning Part 5 pps
... 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 at ... and SPD selection is given in BS EN 623 05-4 and the relevant section of this guide. BS EN 623 05-3 Physical damage to structures and life hazard BS EN 50164 -2 is both a design and in parts a performance ... electricalinsulation distance between the metallic parts canavoid dangerous sparking between different metallicparts. BS EN 50164-1 is a performance specification. It attempts to simulate actual...
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A Guide to BS EN 62305:2006 Protection Against Lightning Part 6 pps
... currents) as well as radiated electromagneticfield effects. BS EN 623 05-4 is an integral part of the completestandard. By integral we mean that following a riskassessment as detailed in BS EN ... levelVisualinspection(years)Completeinspection(years)Critical systemscompleteinspection(years)I and II 1 2 1III and IV 2 4 1 BS EN 623 05-3 Physical damage to structures and life hazard69www.furse.com BS EN 623 05-4 BS EN 623 05-4 Electrical and ... duration 10/350µswaveform presents far greater energy (and thereforethreat) to a system compared to an 8 /20 µs waveformwith an equivalent peak current. Equipotential bonding SPDs that are...
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A Guide to BS EN 62305:2006 Protection Against Lightning Part 7 doc
... 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 623 04-4 Figure A. 3)Welded ... arrangements whenusing KS1as part of the risk evaluation.Similarly KMS(see page 30, Probability of damage) is a factor that is related to the screening effectiveness ofthe shields at the ... travel between separate parts of the samestructure (ie not structurally integral) and whichare not bonded across. Examples include parts of a structure, which are separated by settlement gaps,or...
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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 ... location in BS EN 623 05 -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 ... 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...
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A Guide to BS EN 62305:2006 Protection Against Lightning Part 9 docx
... gas, water, financial, health etc).With reference to Table NC.6 of BS EN 623 05 -2 thefollowing values have been chosenLf2= 0.1 for a financial service providerLo2= 0.01 for a financial ... 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 623 05 -2. The values aresummarised ... conductors to each otheror to metallic installations.Conventional earth impedanceRatio of the peak values of the earth terminationvoltage and the earth termination current, which in general,...
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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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