Instruction Manual


GeoDesyKft.Telefon:06‐1‐481‐2050
H‐1116Budapest,Kondorfastr.6‐8. Fax.:06‐1‐481‐2049
E‐mail:info@geodesy‐fso.
com
http://www.geodesy‐fso.com
2

Horváth Holding
Investment PLC.

SUBJECTOFTHISDOCUMENT:
DuetothedoubleisolationtechniquesappliedintheGeodesyFSOdevices,connectingitintoabuildingslightning
protection,mightraisethepossibilityofthelightningcauseddamages.Inthisdocumentwewilltrytosummarizethe
bestinstallationpracticeshowtoavoiddamagescausebylightningstrike.
OVERVIEW
Theelectromagneticpulsereleasedbyalightningstrikeorthestrikeitselfisthehighestrisk,forelectricalequipments
placedoutsideofbuildings.
Theenergyofthelightningstrikeshastobegrounded.Thismeansthatthepowerofthestrikeshouldbecollected
anddrainedtothegroundthrougha
networkofgroundedcables.Thesecableshavetobeinsulatedfromthedevices
itprotects.
Accordingtothemodernphilosophyoftheinsulatedoftheinsulatedlightningprotectionmethodtoprotectthe
equipmentsfromtheeffectsoflightninghavetobeplacedinsideofasocalled“protectedzone”.In
thiszonethe
equipmentisnotexposedtothelightning.
Ifthesystemisunderthe“protectionzone”oftheinsulatedlightningprotectionsolution,thenitisnotnecessary,to
begrounded.Thegroundinginthiscasewilldecreasetheprotectionlevelasitmightopenanewpathforthe
energy
ofthelightningtodrain.Thismightmakethebehaviourofthelightningunpredictable.
POWERSUPPLYCONSIDERATIONS
Thepowersuppliesareprotectedontheinputandalsoontheoutputbyfuses,soitwon’tpassthelargeenergyof
thelightning.
Thirdpartypowersupplieshavetobeconfirmedbythemanufacturer,thatitissuitableforpoweringoutdoor
equipments.
CABLES
Dataandpowercablesarealsoaconsiderationofthelightningprotection.Wewilltrytosummarizeit.
OPTICALCABLES
Opticalcablesandpatchcordsarenotconductingelectricity,sointhecaseoffibercablesitisnotasubjectof
protection.
COPPERCABLES
AllcopperfeedsshouldbeterminatedintoanapprovedGroundFaultInterrupters,withsurgeprotectionperlocal
electricalcodesorinstallationpractices.
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