Accession Number : ADD004450

Title :   EMP Line Filter Using MOV Devices.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Campi,Morris

Report Date : 03 May 1977

Pagination or Media Count : 4

Abstract : Two cylindrical sleeves of metal oxide varistor material (MOV) are used as capacitive elements of a low pass feedthrough pi-filter network. A metallic housing coaxially surrounds the MOV sleeves and provides electrical contact to ground. The inner surface of each sleeve is electrically connected to an inductor whose leads are terminated by feedthrough connectors on either side of the metal housing. The sleeve inner diameter is large enough to envelop the inductance thereby reducing the package length. The combined shunt capacitance and series inductance form the low pass pi-filter network. At normal signal levels, the package acts as a normal feedthrough low pass pi-filter network. At higher signal levels and transients, the bipolar MOV components clamp the voltage to a given level, determined by the MOV material grain structure and sleeve thickness. (Author)

Descriptors :   *Patents, *Electric filters, *Varistors, Metal oxide semiconductors, Low pass filters, Capacitors, Electromagnetic pulses, Circuits

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE