CA2093420A1 - Electric Arc and Radio Frequency Spectrum Detection - Google Patents

Electric Arc and Radio Frequency Spectrum Detection

Info

Publication number
CA2093420A1
CA2093420A1 CA2093420A CA2093420A CA2093420A1 CA 2093420 A1 CA2093420 A1 CA 2093420A1 CA 2093420 A CA2093420 A CA 2093420A CA 2093420 A CA2093420 A CA 2093420A CA 2093420 A1 CA2093420 A1 CA 2093420A1
Authority
CA
Canada
Prior art keywords
radio frequency
mixer
spectrum
input
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2093420A
Other languages
French (fr)
Other versions
CA2093420C (en
Inventor
Howard M. Ham, Jr.
James J. Keenan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hendry Mechanical Works
Original Assignee
Howard M. Ham, Jr.
James J. Keenan
Hendry Mechanical Works
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Howard M. Ham, Jr., James J. Keenan, Hendry Mechanical Works filed Critical Howard M. Ham, Jr.
Publication of CA2093420A1 publication Critical patent/CA2093420A1/en
Application granted granted Critical
Publication of CA2093420C publication Critical patent/CA2093420C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/0015—Using arc detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/26—Measuring noise figure; Measuring signal-to-noise ratio
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements

Abstract

A principal object of the invention is to detect sparks or arcs (12) in electric circuits (13) or otherwise to detect a spectrum of a broad band of distinct instantaneous radio frequencies in radio frequency noise. The invention rejects extraneous narrow-band signals having frequencies within the broad band, such as by means of filters (21, 27, 29) or a balanced mixer arrangement (32-39). The mixer (37) may be fed from a radio frequency signal duplicator (32, 33, 34) having an input (25) coupled to a source of the spectrum, a first ouptut for one spectrum as duplicated by that duplicator connected to one mixer input (35), and a second output for the other spectrum as duplicated by that duplicator connected to the other mixer input (36). Alternatively, the radio frequency mixer (37) may receive the output of a wide band noise generator (68) at its other input (36, Fig. 5). A combination of a multitude of the distinct instantaneous radio frequencies indicative of the spectrum of the arc (12) is detected, such as with a frequency combination detector (42) having an input (40) coupled to the radio frequency mixer output (38).
CA002093420A 1990-10-24 1990-10-24 Electric arc and radio frequency spectrum detection Expired - Lifetime CA2093420C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1990/006113 WO1992008143A1 (en) 1990-10-24 1990-10-24 Electric arc and radio frequency spectrum detection

Publications (2)

Publication Number Publication Date
CA2093420A1 true CA2093420A1 (en) 1992-04-25
CA2093420C CA2093420C (en) 1999-08-24

Family

ID=22221112

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002093420A Expired - Lifetime CA2093420C (en) 1990-10-24 1990-10-24 Electric arc and radio frequency spectrum detection

Country Status (8)

Country Link
US (1) US5373241A (en)
EP (1) EP0507782B1 (en)
JP (1) JP3210330B2 (en)
KR (1) KR100212020B1 (en)
AU (1) AU656128B2 (en)
CA (1) CA2093420C (en)
DE (1) DE69024975T2 (en)
WO (1) WO1992008143A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6747459B2 (en) 2000-02-05 2004-06-08 Hendry Mechanical Works Electric arc monitoring systems
US6772077B1 (en) 1998-08-10 2004-08-03 Hendry Mechanical Works Electric arc monitoring systems

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US5903159A (en) * 1996-04-10 1999-05-11 Mitsubishi Denki Kabushiki Kaisha Microwave sensor for sensing discharge faults
US5726576A (en) * 1996-04-10 1998-03-10 Mitsubishi Denki Kabushiki Kaisha Microwave sensor for detecting a discharge occurring in an electrical apparatus
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US6456471B1 (en) 1998-02-19 2002-09-24 Square D Company Test, reset and communications operations in an ARC fault circuit interrupter with optional memory and/or backup power
US6625550B1 (en) * 1998-02-19 2003-09-23 Square D Company Arc fault detection for aircraft
US6414829B1 (en) 1998-02-19 2002-07-02 Square D Company Arc fault circuit interrupter
US6621669B1 (en) 1998-02-19 2003-09-16 Square D Company Arc fault receptacle with a feed-through connection
US6782329B2 (en) 1998-02-19 2004-08-24 Square D Company Detection of arcing faults using bifurcated wiring system
US6218844B1 (en) 1998-12-16 2001-04-17 Square D Company Method and apparatus for testing an arcing fault circuit interrupter
US6400258B1 (en) 2000-01-19 2002-06-04 Hendry Mechanical Works Electric arc monitoring systems
US6717786B2 (en) 2001-10-30 2004-04-06 The Boeing Company Automatic voltage source selector for circuit breakers utilizing electronics
US7157710B1 (en) * 2003-11-19 2007-01-02 Kaiser Systems, Inc. Corona discharge detection
US7848728B2 (en) * 2005-05-13 2010-12-07 Agilent Technologies, Inc. Broadband balanced frequency converter
US20080167754A1 (en) * 2007-01-05 2008-07-10 Mcallister Sarah C Ozone and other molecules sensors for electric fault detection
US20080288189A1 (en) * 2007-05-14 2008-11-20 Ravinuthala Ramakrishna Rao Arc detector
WO2009130201A1 (en) * 2008-04-21 2009-10-29 Abb Research Ltd Arc detector and associated method for detecting undesired arcs
US9945894B2 (en) 2012-02-29 2018-04-17 Innovative Scientific Solutions, Inc. Arc fault detection
US9366716B2 (en) 2013-05-23 2016-06-14 Pentair Thermal Management Llc Sub-harmonic arc fault detection system and method
US9366713B2 (en) 2013-05-23 2016-06-14 Pentair Thermal Management Llc Arc fault detection system and method
CN111562467B (en) * 2020-03-24 2022-11-25 中国电力科学研究院有限公司 Halo-starting judgment method and system based on ground synthetic electric field measurement data

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6772077B1 (en) 1998-08-10 2004-08-03 Hendry Mechanical Works Electric arc monitoring systems
US6747459B2 (en) 2000-02-05 2004-06-08 Hendry Mechanical Works Electric arc monitoring systems

Also Published As

Publication number Publication date
CA2093420C (en) 1999-08-24
EP0507782A1 (en) 1992-10-14
EP0507782B1 (en) 1996-01-17
AU656128B2 (en) 1995-01-27
EP0507782A4 (en) 1992-12-30
JP3210330B2 (en) 2001-09-17
KR100212020B1 (en) 1999-08-02
JPH06504113A (en) 1994-05-12
DE69024975T2 (en) 1996-06-27
AU6878091A (en) 1992-05-26
DE69024975D1 (en) 1996-02-29
US5373241A (en) 1994-12-13
WO1992008143A1 (en) 1992-05-14

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