Lightning activated relay

Details Lightning activated relay Lightning activated relay

1978-12-27

1981-06-30

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

340601, 361120, H02H 104

Patent

active

042765765

ABSTRACT:
A lightning activated relay utilizes an electric or magnetic field responsive detector for determining the presence of atmospheric conditions potentially capable of producing lightning or for detecting the occurrence of lightning within a predetermined range. Switching circuitry responsive to the detector is provided for isolating electrical equipment from the electric power mains and isolating or grounding communications or other equipment susceptible to lightning damage when such conditions are detected or upon the occurrence of a temporary power interruption.

REFERENCES:
patent: 2265868 (1941-12-01), Schonland
patent: 3753117 (1973-08-01), Downing et al.
"Building a Sferics Counter With Two Ics"-SAJA et al., Electronic Engineering 2/1977, p. 23.
"The Return Stroke of the Lightning Flash to Earth as a Source of VLF Atmospherics"-Dennis et al., Radio Science Journal of Research NBS/USNC-URSI, vol. 68D, No. 7, Jul. 1964.
"Leader and Junction Processes in the Lightning Discharge as a Source of VLF Atmospherics"-Arnold et al., Radio Science Journal of Research NBS/USNC-URSI, vol. 68D, No. 7, Jul. 1964.
"Amplitude and Phase Curves for Ground-Wave Propagation in the Band 200 Cycles Per Second to 500 Kilocycles" James R. Wait et al., U.S. Government Printing Office 1956.

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