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Earth Electrodes for Grounding NEMP Type Lightning
GEORGIA INST OF TECH ATLANTA
Pagination or Media Count:
An investigation was conducted into the properties of earth electrode systems over a frequency range covering the NEMP type lightning rise times faster than 2 microseconds power spectrum. Since this power spectrum extends well into the VHF region, conventional low frequency less than 100 Hz and historic impulse measurement techniques were not adequate to describe the electrode systems response to NEMP type lightning. Therefore, initial emphasis was placed on the development of a measurement technique that could be used to both 1 Assess the performance of a given ground electrode and 2 conduct a site survey to determine the best location for ground electrodes. Then the technique was used to evaluate the performance of various common ground electrode configurations the subject of a companion paper to be published at a later date.
APPROVED FOR PUBLIC RELEASE