Accession Number:

ADP002182

Title:

Earth Electrodes for Grounding NEMP Type Lightning

Descriptive Note:

Corporate Author:

GEORGIA INST OF TECH ATLANTA

Personal Author(s):

• Millard, D. P.

Report Date:

1983-01-01

Pagination or Media Count:

17.0

Abstract:

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.

Descriptors:

• *ELECTRICAL GROUNDING
• ELECTRICAL IMPEDANCE
• HIGH FREQUENCY
• LIGHTNING
• LOW FREQUENCY
• MEASUREMENT
• PERFORMANCE(ENGINEERING)
• PROTECTIVE EQUIPMENT
• SYMPOSIA

Subject Categories:

• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE