These parts of the standard are introduced here. In these parts underwent periodic technical review, with updated parts 1, 3 and 4 released in Updated part 2 is currently under discussion and is expected to be published in late It differs from BS in as much that this new part has four Classes or protection levels of LPS, as opposed to the basic two ordinary and high-risk levels in BS It classifies the sources and types of damage to be evaluated and introduces the risks or types of loss to be anticipated as a result of the lightning activity.
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That is the target against which all the major strategies and requirements are aimed. SPD requirement Modern electronic equipment can only survive within a relatively narrow voltage range. Too high, and it will fry!!! A circuit that runs off a nominal voltage of volts will not survive a surge of 10, volts. Conversely, spark gap SPDs aside from their other problems react far too slowly and allow too much voltage and current to get past them, so are not a good choice for protecting electronic equipment.
Read more here. Despite all logic to the contrary, this standard specifies the use of spark gaps to play the principal role in protecting sensitive electronics. That is the first strike against it. Because spark gaps cannot provide a low enough protection level to alone protect electronic equipment the standard must also specify the use of MOVs. More information on SPD coordination can be found here.
In the parlance of this standard there are no such thing as "SPDs. LPZs-Lightning Protection Zones This standard starts by introducing the concept of lightning protection zones with the diagram to the right.
Its importance is underscored with the statement that the protection of electronic equipment from lightning "is based on the lightning protection zone LPZ concept. So what does this mean?
BS EN 62305-4:2011 Protection against lightning
Vulrajas Document Status Indicators The Green document status indicator jec that the document is: Take the smart route to manage medical device compliance. Lynbeskyttelse — Del 4: This standard does not deal with detailed design of the electrical and electronic systems themselves. The Red document status indicator indicates that the document is an old version The document has likely been withdrawn by the publisher, also the meta data presented here may be out of date as it is no longer being maintained by the iwc teams at NBS. All International European Italian. Kontakt venligst Dansk Standard. Beskrivelse This part of IEC provides information for the design, installation, inspection, maintenance and testing of electrical and electronic system protection SPM to reduce the risk of permanent failures due to lightning electromagnetic impulse LEMP within a structure.
IEC BS EN 62305 1 - 4