FAA lightning protection study: lightning-induced transients on buried shielded transmission lines. Final report Jun 1974--Jun 1975
An analysis of induced transient current and voltage pulses on buried shielded transmission lines, due to earth conduction effects of nearby lightning discharges is presented. Two basic analytical methods are presented to describe the various kinds of coupling mechanisms between a lightning discharge to ground and an earth-return transmission line. The transmission line is assumed to be a long straight horizontal coaxial cable with an inner shield and an outer armor, terminated on both ends with typical communication equipment load impedances. The general case is considered in which the outermost conductor is not necessarily in perfect contact with the conducting earth but as a contact impedance with the earth, as in cables with an outer dielectric covering for corrosion or water protection. Both direct strikes to the cable via arcing from the terminal ground point of the lightning channel to the outer conductor of the coaxial cable and indirect strikes to the cable via conductive coupling mechanisms through the earth are considered.
- Research Organization:
- Rome Air Development Center, Griffiss AFB, NY (USA)
- OSTI ID:
- 7290503
- Report Number(s):
- AD-A-039638
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
24 POWER TRANSMISSION AND DISTRIBUTION
CABLES
COAXIAL CABLES
CONDUCTOR DEVICES
CURRENTS
ELECTRIC CABLES
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRIC GROUNDS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
EQUIPMENT
LIGHTNING
POWER TRANSMISSION
POWER TRANSMISSION LINES
PULSES
TRANSIENTS
UNDERGROUND POWER TRANSMISSION