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 ... angle (Class of LPS), the spacingbetween the air rods and the height above a particular reference plane. See Figure 4. 18b.21Figure 4. 18b: View on arrow A BS EN 62305-3 | Catenary (or suspended)...

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

... 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 the same potentialthen ... this guide. Figure 4. 40 (based on BS EN 62305-3 fig E .45 ) shows a typical example of an equipotential bondingarrangement. The gas, water and central heatingsystem are all bonded directly to ... 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 Guide to BS EN 62305:2006 Protection Against Lightning Part 6 pps

... transient overvoltages andtransient 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 ... generallysubstantial enough to carry partial lightning currents,telecommunication lines have significantly smallercross-sectional areas.Taking this factor into account, the worst case surgethat could ... gas pipes,power and data cables) should be bonded to a singleearth reference point. This equipotential bonding barmay be the power earth, a metal plate, or an internalring conductor/partial...

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

... 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

... nationalparameters and information. 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 ... at risk in a farbroader sense than merely the physical damage thatcan be caused to a structure by a lightning discharge. BS EN 62305-2 Risk management BS EN 62305-1 | Type of loss 14 www.furse.comType ... illustrated in Figure 2 .4 and expanded upon in BS EN 62305 -4. LPZ 0 A SPD 0 A /1Equipotentialbonding bymeans of SPDSeparation distance against dangeroussparkingFlash to thestructureFlash...

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 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 ... 0 A )Foundation earthing 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 ... 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...

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 ... 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 ... documentedinspections and, where necessary, maintenance inaccordance with an LPMS management plan. BS EN 62305 -4 | Summary90www.furse.com BS EN 62305 -4 Electrical and electronic systems...

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

... of flashes) in accordance withAnnex A of BS EN 62305-2. The calculated values aresummarised in Table 6.18.Probability of damage Ascertain the probability of each particular type ofdamage ... x 10-5RZ2(T)N /A N /A 4. 477 x 10-5 4. 477 x 10-5 4. 477 x 10-51. 343 x 10 -4 Total N /A N /A 4. 178 x 10 -4 3.931 x 10 -4 3.931 x 10 -4 1.2 04 x 10-3RR2 44 12 04 10 1 10=×>=×−−.TRisks ... 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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