catalog prf1 prd pf surge arrester - Schneider Electric

se the best lightning protectionAs proof ofthe completeeffectivenessof lightningprotectionin meetingeach need,3Identifythe type of powerdistributionIntegration into the electrical powerdistribution:• single switchboard or main switchboard,• subdistribution board,• sensitive equipment more than 30 mfrom the switchboard.Schneider Electricoffers a simpleand effectiveselection method.Depending on the sizeof the building and theextent of its electricalsystem, one or more surgearresters must be used inthe various switchboardsin the installation.4Understandthe risk of the impactof lightning on the siteLocation of the building:• in an urban, suburban, groupedhousing area.Lightning is attracted byhigh points that conductelectricity. They can be:• natural: tall trees, mountainpeaks, damp areas, ferroussoils.• artificial: chimney stacks,aerials, pylons, lightningrods.Indirect effects can be incurredwithin a fifty metre radius aroundthe point of impact.• in plain area.• in an area where there is aspecial risk (pylon, tree,mountainous region, mountainpeak, damp area or pond).• in an exceptionally exposed area(lightning rod within 50 metresof a building).