ELEC9713 Assighment.docx - Lightning protection system...

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Lightning protection system design Rui Xu z5099926 Introduction The main forming part of this system is air terminal, down conductors as well as earthing system. In this system, the electric charge from the lightning is received by the air terminal and is sent to the down conductor and further to the earth. In this way, the building, to a large certain extent, could avoid suffering from lightning strikes. There is no doubt that this design must adhere to some standard regulations such as ‘AS/NZS 1768:2007 Lightning Protection’ and “IEC 62305 Protection against lightning” series. Furthermore, materials are supposed to comply with EN 50164 series of component standards. The IEC 62305 series gives some information about lightning protection levels (LPL I to IV), which respectively represents maximum values and minimum values. LPLI LPLII LPL III LPI IV Maximum peak current (KA) 200 150 100 100 Minimum peak current (KA) 3 5 10 16 Table1: Maximum and minimum current levels for lightning protections Note1: In this design, LPL II level is chosen for this apartment building. Lightning protection system components Air Terminal When it comes to the materials of the air terminal, my first plan is copper because copper has supreme conductivity and more compatible compared to aluminium. In order to place air-terminal more efficiently, much attention should be paid to the minimum value of expected current and the ability of the lightning protection system to intercept these smaller flashes. The striking
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  • One '14
  • air terminal, Lightning protection system, lightning protection

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