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

... has a flash density map and a world thunderstorm day's map along with an accompanying table. These have been transferred to BS EN 6 230 5-2, and also illustrated in this guide. See Figure 3. 5 ... structure Underground service Overhead service A m H c H b 1 :3 BS EN 6 230 5-2 | Collection area BS EN 6 230 5-2 Risk management (3. 18) (3. 19) (3. 20) Figure 3. 4:...

Ngày tải lên: 08/08/2014, 13:21

... the standard. Part 2: Risk management BS EN 6 230 5-2 (part 2) risk management approach, does not concentrate so much on the purely physical damage to a structure caused by a lightning discharge, ... Lightning 2 www.furse.com A Guide to BS EN 6 230 5:2006 Protection Against Lightning Author’s note The initial reaction from anyone reading, absorbing and compa...

Ngày tải lên: 08/08/2014, 13:21

... management looks at risk in a far broader sense than merely the physical damage that can be caused to a structure by a lightning discharge. BS EN 6 230 5-2 Risk management BS EN 6 230 5-1 | Type of loss 14 www.furse.com Type ... national parameters and information. These National Annex tables are highlighted later in this guide. One of the first changes to realise is tha...

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... termination network Connection to air termination network Reference plane Catenary conductors (air termination) BS EN 6 230 5 -3 Physical damage to structures and life hazard h Physical height of catenary conductors above ... 25.9 13. 4 29 45.6 29.6 37 .7 22 .3 24.4 12.9 30 44.8 29.8 36 .7 22 .3 22.8 12.2 31 44.1 30 .0 35 .7 22.2 32 43. 3 30 .1 34 .7 22.1 33 42.6 30 .3...

Ngày tải lên: 08/08/2014, 13:21

... and SPD selection is given in BS EN 6 230 5-4 and the relevant section of this guide. BS EN 6 230 5 -3 Physical damage to structures and life hazard BS EN 50164-2 is both a design and in parts a performance ... electrical insulation distance between the metallic parts can avoid dangerous sparking between different metallic parts. BS EN 50164-1 is a performance speci...

Ngày tải lên: 08/08/2014, 13:21

... currents) as well as radiated electromagnetic field effects. BS EN 6 230 5-4 is an integral part of the complete standard. By integral we mean that following a risk assessment as detailed in BS EN ... duration 10 /35 0µs waveform presents far greater energy (and therefore threat) to a system compared to an 8/20µs waveform with an equivalent peak current. Equipotential bondi...

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... electrode Bonding terminals LPZ 0 B LPZ 0 A Management of an LPMS As detailed in BS EN 6 230 5 -3, there is a requirement to routinely maintain and inspect a structural LPS to ensure its designed mechanical and electrical characteristics ... 5.5: Ideal Faraday Cage Lightning current Continuous metal box - ideal Faraday Cage Figure 5.6: Large volume shield created by metal rei...

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... very easy and become routine in nature to automatically calculate the risks R 1 and R 2 . If it is a listed building or has any cultural importance then R 3 can additionally be calculated at the ... documentation. The documentation should be continuously updated, particularly to take account of alterations to the structure that may require an extension of the LPMS. Summary Damage...

Ngày tải lên: 08/08/2014, 13:21

... flashes) in accordance with Annex A of BS EN 6 230 5-2. The calculated values are summarised in Table 6.18. Probability of damage Ascertain the probability of each particular type of damage occurring ... 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...

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... materials are considered. Suburban environment Area with a medium density of buildings. ”Town outskirts” is an example of a suburban environment. Surge Transient wave appearing as overvoltage ... current attains 10% of its peak value. Voltage switching type SPD SPD that has a high impedance when no surge is present, but can have a sudden change in impedance to a low value in res...

Ngày tải lên: 08/08/2014, 13:21