Condition of downconductor when lightning
Condition of downconductor when lightning
(OP)
Actually the earth should be zero voltage. By when the downconductor subject to the lightning, it will cause the ground potential rise. What is the estimate value of this ground potential rise?






RE: Condition of downconductor when lightning
Bung
RE: Condition of downconductor when lightning
1. D.G. Fink and H.W. Beaty "Standard Handbook for Electrical Engineers," 14th Ed., McGraw-Hill, 2000
Section 27 Lightning and Overvoltage Protection
Figure 27.8 Illustration of electric field below an electrified thundercloud.
Essentially, the electrical field of the Earth rises below the electrified thundercloud.
RE: Condition of downconductor when lightning
Possibly useful references in NFPA 780 boilerplate, Lightning Protection Code.
http://www.nfpa.org/Codes/NFPA_Codes_and_Standards/List_of_NFPA_documents/NFPA_780.asp
OTOH, Skimming Google exposes seemingly utter contempt for 780: www.lightningsafety.com/nlsi_lhm/NFP_780.html and, http://tis.eh.doe.gov/techstds/meeting/NRCDOELightningStandardsPresentation.pdf
RE: Condition of downconductor when lightning