Accession Number:

ADA048178

Title:

Principles of Protection of Ground Based Radio Stations and Other Installations from Damage by Lightning.

Descriptive Note:

Corporate Author:

QUEENSLAND UNIV BRISBANE (AUSTRALIA) DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

Report Date:

1977-06-01

Pagination or Media Count:

85.0

Abstract:

The primary purpose of this manual is to supply recommendations for the protection of vulnerable equipment in Naval H.F. radio stations from the damaging effects of lightning strikes in areas of relatively high lightning incidence. The recommendations, which can be applied to any installation containing electronic equipment operating in a high lighting-incidence area, include methods of interception of direct strokes, protection against induced current and voltage surges, and protection against ground currents due to lightning. The expected number of lightning strikes per year to an installation may be based on the thunderday level for the region. This information may be combined with the statistical distributions of peak current in lightning flashes to predict the frequency of occurrence of injected currents of various magnitudes. Adequate earthing arrangements, depending on the local soil resistivity, will prevent excessive potentials within or between various parts of an installation. With suitably placed grounded overhead shield wires, it should be possible to prevent to direct strikes to any vulnerable part of an installation excepting antennas.

Descriptors:

• *LIGHTNING
• *PROTECTIVE EQUIPMENT
• *RADIO STATIONS
• DAMAGE
• VOLTAGE
• ANTENNAS
• ELECTRIC CURRENT
• AUSTRALIA
• NAVAL SHORE FACILITIES
• SURGES
• GROUND STATIONS

Subject Categories:

• Atmospheric Physics
• Electrical and Electronic Equipment
• Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE