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

... or‘separation’ distance should always be maintainedbetween the appropriate metallic installations/parts.Wherever protection of internal systems against overvoltages caused by a lightning discharge ... requirements of BS EN 50 164-2. BS EN 50 164-3 covers the application of spark gapswhen used in an LPS. A typical application would bewhen certain metal installations need to be isolatedfrom the nearby ... inCENELEC. These are:● BS EN 50 164-4 Lightning protection components(LPC) Part 4: Requirements for conductor fasteners● BS EN 50 164 -5 Lightning protection components(LPC) Part 5: Requirements...

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

... conductors(air termination) BS EN 623 05- 3 Physical damage to structures and life hazardh Physical height of catenary conductors above the reference planes Separation distancep Penetration ... 10.214 59 .6 23.8 55 .4 20.3 47.0 14.9 35. 8 10.1 15 58.4 24.4 54 .1 20.6 45. 4 15. 1 33.6 10.016 57 .3 24.9 52 .8 20.9 43.8 15. 2 31.4 9.817 56 .2 25. 4 51 .5 21.2 42.3 15. 3 29.2 9.618 55 .2 25. 9 50 .3 21 .5 ... radiusCatenary conductors(air termination)Space protected by two parallel catenary conductorsConnection to air terminationnetworkConnection to air terminationnetworkReference planeCatenary...

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 623 05- 4 is an integral part of the completestandard. By integral we mean that following a riskassessment as detailed in BS EN ... duration 10/ 350 µswaveform presents far greater energy (and thereforethreat) to a system compared to an 8/20µs waveformwith an equivalent peak current. Equipotential bonding SPDs that are...

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 623 05- 2 (part 2) risk managementapproach, does not concentrate so much onthe purely physical damage to a structurecaused by a lightning discharge, ... Lightning 2www.furse.com A Guide to BS EN 623 05: 2006 Protection Against Lightning Author’s noteThe initial reaction from anyone reading, absorbingand comparing this new four -part BS EN 623 05 with BS 6 651 will ... lightning .The approach these new parts impart, are much wider in their view, on protection against lightning, when assessed against BS 6 651 . 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 ... 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 ... respect safety distances ds BS EN 623 05- 2 | Perception of risk22 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 and BS EN 623 05- 4.The...

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

... to BS 6 651 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 ... 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/ 350 µs 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 62304-4 Figure A. 3)Welded ... capturing lightning energy and should therefore be avoided. Figure 5. 7shows a large loop area created between power anddata communication cabling.Figure 5. 7: Loop areasGood practiceBad practiceArea ... 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...

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 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 ... – Summary of collection areas Symbol Area (m2) A d/b12 ,56 1.73 A m227,149 .5 A l(P)9 ,56 5.89 A l(T) 15, 099.88 A i(P) 256 ,9 35. 1 A i(T)3 95, 284.7Table 6.19: Example 2 – Summary of probabilities ... 1 hour per day and 5 days per week.Therefore:In the absence of any information relating to the timethat occupants are in a hazardous place with respect to step and touch potentials, Lt1will...

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