FAA lightning protection study: lightning-induced transients on buried shielded transmission lines. Final report Jun 1974--Jun 1975

Technical Report · Sun Jun 01 00:00:00 EDT 1975

OSTI ID:7290503

Nordgard, J D; Chen, C

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)
• DOE Contract Number: DOT-FA72WAI-356
• OSTI ID: 7290503
• Report Number(s): AD-A-039638
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
POWER TRANSMISSION LINES
TRANSIENTS
COAXIAL CABLES
ELECTRIC CURRENTS
ELECTRIC GROUNDS
ELECTRIC POTENTIAL
LIGHTNING
PULSES
UNDERGROUND POWER TRANSMISSION
CABLES
CONDUCTOR DEVICES
CURRENTS
ELECTRIC CABLES
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
EQUIPMENT
POWER TRANSMISSION
200300* - Electric Power Engineering- Power Transmission & Distribution- (-1989)