Accession Number : AD0785859

Title :   FAA Lightning Protection Study: Lightning Protection Requirements for AN/GRN-27(V) Instrument Landing System.

Descriptive Note : Final rept. Nov 72-31 Jan 74,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s) : Huddleston, Gene K. ; Nordgard, John D. ; Larson, Ronald W.

Report Date : APR 1974

Pagination or Media Count : 120

Abstract : The withstand capabilities and protection requirements for solid state circuits of the AN/GRN-27 (V) Instrument Landing System susceptible to lightning-induced transients on buried control cables are presented. Susceptible circuits and components were identified from the wiring diagrams as transistors, diodes, relay contacts, and electrolytic capacitors. Withstand capabilities of each circuit were determined analytically using manufacturer's data and a 1000-volt, 10 x 1000 microsec test waveform. Avalanche diode surge protectors and series resistance are recommended to protect susceptible circuits from lightning-induced transients on buried control cable conductors connected to the circuits.

Descriptors :   *INSTRUMENT LANDINGS, *LIGHTNING ARRESTERS, TRANSIENTS, SURGES, PROTECTIVE EQUIPMENT, RADIO EQUIPMENT, SEMICONDUCTOR DEVICES.

Subject Categories : Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE