JPH05180895A - 電気回路用のアーク検出器 - Google Patents
電気回路用のアーク検出器Info
- Publication number
- JPH05180895A JPH05180895A JP4103710A JP10371092A JPH05180895A JP H05180895 A JPH05180895 A JP H05180895A JP 4103710 A JP4103710 A JP 4103710A JP 10371092 A JP10371092 A JP 10371092A JP H05180895 A JPH05180895 A JP H05180895A
- Authority
- JP
- Japan
- Prior art keywords
- arc
- circuit
- signal
- response signal
- resistor
- 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.)
- Pending
Links
- 230000004044 response Effects 0.000 claims abstract description 162
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 65
- 239000004020 conductor Substances 0.000 claims abstract description 59
- 238000010891 electric arc Methods 0.000 claims abstract description 10
- 230000005684 electric field Effects 0.000 claims description 70
- 230000000739 chaotic effect Effects 0.000 claims description 11
- 230000005284 excitation Effects 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 claims description 7
- 230000004069 differentiation Effects 0.000 claims description 5
- 230000002411 adverse Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 95
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 38
- 230000001186 cumulative effect Effects 0.000 description 27
- 238000001514 detection method Methods 0.000 description 23
- 238000010586 diagram Methods 0.000 description 19
- 230000007704 transition Effects 0.000 description 18
- 230000007935 neutral effect Effects 0.000 description 12
- 230000006870 function Effects 0.000 description 11
- 238000012790 confirmation Methods 0.000 description 8
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 230000006378 damage Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000001902 propagating effect Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 244000145845 chattering Species 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012256 powdered iron Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
-
- 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
Landscapes
- Testing Relating To Insulation (AREA)
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/676,739 US5185687A (en) | 1991-03-28 | 1991-03-28 | Chaos sensing arc detection |
| US676739 | 1991-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05180895A true JPH05180895A (ja) | 1993-07-23 |
Family
ID=24715774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4103710A Pending JPH05180895A (ja) | 1991-03-28 | 1992-03-30 | 電気回路用のアーク検出器 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5185687A (cg-RX-API-DMAC7.html) |
| EP (1) | EP0506319A3 (cg-RX-API-DMAC7.html) |
| JP (1) | JPH05180895A (cg-RX-API-DMAC7.html) |
| KR (1) | KR920019036A (cg-RX-API-DMAC7.html) |
| AU (1) | AU645229B2 (cg-RX-API-DMAC7.html) |
| TW (1) | TW228619B (cg-RX-API-DMAC7.html) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100615A (zh) * | 2018-10-19 | 2018-12-28 | 河海大学 | 一种基于频率特性的电缆故障定位方法 |
| KR102284521B1 (ko) * | 2021-06-30 | 2021-08-02 | 상도일렉트릭 주식회사 | 휴대형 아크 펄스 탐지 장치 및 그에 고주파 펄스를 인가하기 위한 펄스 발신기 |
Families Citing this family (92)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5434509A (en) * | 1992-07-30 | 1995-07-18 | Blades; Frederick K. | Method and apparatus for detecting arcing in alternating-current power systems by monitoring high-frequency noise |
| US5432455A (en) * | 1992-07-30 | 1995-07-11 | Blades; Frederick K. | Method and apparatus for detecting arcing in alternating current power systems by monitoring high-frequency noise |
| US5729145A (en) * | 1992-07-30 | 1998-03-17 | Siemens Energy & Automation, Inc. | Method and apparatus for detecting arcing in AC power systems by monitoring high frequency noise |
| US5452223A (en) * | 1993-08-20 | 1995-09-19 | Eaton Corporation | Arc detection using current variation |
| SG97742A1 (en) * | 1993-08-31 | 2003-08-20 | Shell Int Research | A method and apparatus for preventing the occurence of false responses in optical detection devices |
| US6452767B1 (en) | 1995-03-13 | 2002-09-17 | Square D Company | Arcing fault detection system for a secondary line of a current transformer |
| US6377427B1 (en) | 1995-03-13 | 2002-04-23 | Square D Company | Arc fault protected electrical receptacle |
| US6313642B1 (en) | 1995-03-13 | 2001-11-06 | Square D Company | Apparatus and method for testing an arcing fault detection system |
| US6246556B1 (en) | 1995-03-13 | 2001-06-12 | Square D Company | Electrical fault detection system |
| US5825598A (en) * | 1997-02-11 | 1998-10-20 | Square D Company | Arcing fault detection system installed in a panelboard |
| US6259996B1 (en) | 1998-02-19 | 2001-07-10 | Square D Company | Arc fault detection system |
| US6034611A (en) * | 1997-02-04 | 2000-03-07 | Square D Company | Electrical isolation device |
| US6242993B1 (en) | 1995-03-13 | 2001-06-05 | Square D Company | Apparatus for use in arcing fault detection systems |
| US5682101A (en) | 1995-03-13 | 1997-10-28 | Square D Company | Arcing fault detection system |
| US6313641B1 (en) | 1995-03-13 | 2001-11-06 | Square D Company | Method and system for detecting arcing faults and testing such system |
| US6532424B1 (en) | 1995-03-13 | 2003-03-11 | Square D Company | Electrical fault detection circuit with dual-mode power supply |
| US5590012A (en) * | 1995-03-30 | 1996-12-31 | Siemens Energy & Automation, Inc. | Electric arc detector sensor circuit |
| US5973896A (en) * | 1995-05-26 | 1999-10-26 | David C. Nemir | Shock and arc protection device for an electrical distribution system |
| US5844759A (en) * | 1995-05-26 | 1998-12-01 | David C. Nemir | Electrical fault interrupter |
| DE19522603A1 (de) * | 1995-06-19 | 1997-01-09 | Siemens Ag | Schutzeinrichtung gegen Überlastung der Schaltkontakte eines Schaltgerätes |
| US5726577A (en) * | 1996-04-17 | 1998-03-10 | Eaton Corporation | Apparatus for detecting and responding to series arcs in AC electrical systems |
| US5818237A (en) * | 1996-06-10 | 1998-10-06 | Eaton Corporation | Apparatus for envelope detection of low current arcs |
| US5805399A (en) * | 1996-09-06 | 1998-09-08 | Everbrite, Inc | Apparatus for detecting luminous tube and power supply faults where ground fault currents may be absent |
| US5834940A (en) * | 1996-09-24 | 1998-11-10 | Brooks; Stanley J. | Arcing fault detector testing and demonstration system |
| US5847913A (en) * | 1997-02-21 | 1998-12-08 | Square D Company | Trip indicators for circuit protection devices |
| US5839092A (en) * | 1997-03-26 | 1998-11-17 | Square D Company | Arcing fault detection system using fluctuations in current peaks and waveforms |
| US5946179A (en) * | 1997-03-25 | 1999-08-31 | Square D Company | Electronically controlled circuit breaker with integrated latch tripping |
| US5835319A (en) * | 1997-04-16 | 1998-11-10 | General Electric Company | Method and apparatus for circuit breaking |
| US5809364A (en) * | 1997-05-19 | 1998-09-15 | Eastman Kodak Company | Instability detection for corona chargers |
| JP3416461B2 (ja) * | 1997-05-30 | 2003-06-16 | キヤノン株式会社 | 太陽電池充電制御装置 |
| WO1999009424A1 (en) * | 1997-08-14 | 1999-02-25 | Hendry Mechanical Works | Electric arc monitoring systems |
| US6128168A (en) * | 1998-01-14 | 2000-10-03 | General Electric Company | Circuit breaker with improved arc interruption function |
| US6002561A (en) * | 1998-01-14 | 1999-12-14 | General Electric Company | Arcing fault detection module |
| US6621669B1 (en) | 1998-02-19 | 2003-09-16 | Square D Company | Arc fault receptacle with a feed-through connection |
| US5986860A (en) * | 1998-02-19 | 1999-11-16 | Square D Company | Zone arc fault detection |
| US6567250B1 (en) | 1998-02-19 | 2003-05-20 | Square D Company | Arc fault protected device |
| US6782329B2 (en) | 1998-02-19 | 2004-08-24 | Square D Company | Detection of arcing faults using bifurcated wiring system |
| US6625550B1 (en) | 1998-02-19 | 2003-09-23 | Square D Company | Arc fault detection for aircraft |
| US6477021B1 (en) | 1998-02-19 | 2002-11-05 | Square D Company | Blocking/inhibiting operation in an arc fault detection system |
| US6275044B1 (en) | 1998-07-15 | 2001-08-14 | Square D Company | Arcing fault detection system |
| US6772077B1 (en) | 1998-08-10 | 2004-08-03 | Hendry Mechanical Works | Electric arc monitoring systems |
| US7463124B2 (en) * | 1998-08-24 | 2008-12-09 | Leviton Manufacturing Co., Inc. | Circuit interrupting device with reverse wiring protection |
| US6982856B2 (en) * | 2001-03-21 | 2006-01-03 | Leviton Manufacturing Co., Inc. | GFCI with reset lockout |
| US7098761B2 (en) * | 1998-08-24 | 2006-08-29 | Leviton Manufacturing Co., Inc. | Reset lockout mechanism and independent trip mechanism for center latch circuit interrupting device |
| US7049910B2 (en) * | 1998-08-24 | 2006-05-23 | Leviton Manufacturing Co., Inc. | Circuit interrupting device with reset lockout and reverse wiring protection and method of manufacture |
| US7400477B2 (en) * | 1998-08-24 | 2008-07-15 | Leviton Manufacturing Co., Inc. | Method of distribution of a circuit interrupting device with reset lockout and reverse wiring protection |
| US6040967A (en) * | 1998-08-24 | 2000-03-21 | Leviton Manufacturing Co., Inc. | Reset lockout for circuit interrupting device |
| US6288882B1 (en) | 1998-08-24 | 2001-09-11 | Leviton Manufacturing Co., Inc. | Circuit breaker with independent trip and reset lockout |
| US6437700B1 (en) * | 2000-10-16 | 2002-08-20 | Leviton Manufacturing Co., Inc. | Ground fault circuit interrupter |
| US6771152B2 (en) * | 2001-03-21 | 2004-08-03 | Leviton Manufacturing Co., Inc. | Pivot point reset lockout mechanism for a ground for fault circuit interrupter |
| US6944001B2 (en) * | 1998-08-24 | 2005-09-13 | Leviton Manufacturing Co., Inc. | Circuit interrupting system with independent trip and reset lockout |
| US6373257B1 (en) | 1998-12-09 | 2002-04-16 | Pass & Seymour, Inc. | Arc fault circuit interrupter |
| US6268989B1 (en) | 1998-12-11 | 2001-07-31 | General Electric Company | Residential load center with arcing fault protection |
| US6229679B1 (en) | 1998-12-15 | 2001-05-08 | Macbeth Bruce F. | Arc fault circuit interrupter without DC supply |
| US6239962B1 (en) | 1999-02-09 | 2001-05-29 | General Electric Company | ARC fault circuit breaker |
| US6259340B1 (en) | 1999-05-10 | 2001-07-10 | General Electric Company | Circuit breaker with a dual test button mechanism |
| US6356426B1 (en) | 1999-07-19 | 2002-03-12 | General Electric Company | Residential circuit breaker with selectable current setting, load control and power line carrier signaling |
| US6232857B1 (en) | 1999-09-16 | 2001-05-15 | General Electric Company | Arc fault circuit breaker |
| US6466424B1 (en) | 1999-12-29 | 2002-10-15 | General Electric Company | Circuit protective device with temperature sensing |
| US6678137B1 (en) | 2000-08-04 | 2004-01-13 | General Electric Company | Temperature compensation circuit for an arc fault current interrupting circuit breaker |
| US6937451B2 (en) | 2001-03-21 | 2005-08-30 | Leviton Manufacturing Co., Inc. | ALCI with reset lockout and independent trip |
| US6751528B1 (en) | 2000-11-27 | 2004-06-15 | General Electric Company | Residential circuit arc detection |
| US7151656B2 (en) | 2001-10-17 | 2006-12-19 | Square D Company | Arc fault circuit interrupter system |
| US7068480B2 (en) | 2001-10-17 | 2006-06-27 | Square D Company | Arc detection using load recognition, harmonic content and broadband noise |
| US7136265B2 (en) * | 2001-10-17 | 2006-11-14 | Square D Company | Load recognition and series arc detection using bandpass filter signatures |
| US6717786B2 (en) | 2001-10-30 | 2004-04-06 | The Boeing Company | Automatic voltage source selector for circuit breakers utilizing electronics |
| CA2428361C (en) * | 2002-05-09 | 2009-04-28 | Hubbell Incorporated | Gfci that cannot be reset until wired correctly on line side and power is applied |
| US6949994B2 (en) * | 2002-12-30 | 2005-09-27 | Leviton Manufacturing Co., Inc. | GFCI without bridge contacts and having means for automatically blocking a face opening of a protected receptacle when tripped |
| US7944331B2 (en) * | 2003-02-03 | 2011-05-17 | Leviton Manufacturing Co., Inc. | Circuit interrupting device with reverse wiring protection |
| US7737809B2 (en) * | 2003-02-03 | 2010-06-15 | Leviton Manufacturing Co., Inc. | Circuit interrupting device and system utilizing bridge contact mechanism and reset lockout |
| US7049911B2 (en) * | 2003-02-03 | 2006-05-23 | Leviton Manufacturing Co., Inc. | Circuit interrupting device and system utilizing electromechanical reset |
| CN100533898C (zh) * | 2003-02-03 | 2009-08-26 | 立维腾制造有限公司 | 利用电桥式触点机构和复位锁止件的断路装置和系统 |
| US20070014058A1 (en) * | 2003-07-03 | 2007-01-18 | Chan David Y | Neutral switch test mechanism for a circuit interrupter |
| WO2005099393A2 (en) | 2004-04-08 | 2005-10-27 | Leviton Manufacturing Co., Inc. | Circuit interrupting device with a single test-reset button |
| US7455538B2 (en) * | 2005-08-31 | 2008-11-25 | Leviton Manufacturing Co., Inc. | Electrical wiring devices with a protective shutter |
| US7253637B2 (en) | 2005-09-13 | 2007-08-07 | Square D Company | Arc fault circuit interrupter system |
| US20080157781A1 (en) * | 2006-12-27 | 2008-07-03 | General Electric Company | Methods and systems for detecting series arcs in electrical systems |
| US7463465B2 (en) * | 2006-12-28 | 2008-12-09 | General Electric Company | Series arc fault current interrupters and methods |
| US7540779B2 (en) * | 2007-03-23 | 2009-06-02 | Coherent, Inc. | RF shielded, series inductor, high RF power impedance matching interconnector for CO2 slab laser |
| US7834560B2 (en) * | 2007-07-26 | 2010-11-16 | Leviton Manufacturing Co., Inc. | Dimming system powered by two current sources and having an operation indicator module |
| US20090171603A1 (en) * | 2007-12-28 | 2009-07-02 | Sriram Changali | Methods of detecting series arcs in electrical signals |
| US8054591B2 (en) * | 2008-07-24 | 2011-11-08 | General Electric Company | Arc detection using discrete wavelet transforms |
| US8159793B2 (en) * | 2008-12-22 | 2012-04-17 | General Electric Company | Arc detection using detailed and approximate coefficients from discrete wavelet transforms |
| US8170816B2 (en) * | 2008-12-29 | 2012-05-01 | General Electric Company | Parallel arc detection using discrete wavelet transforms |
| US20110216546A1 (en) * | 2010-03-03 | 2011-09-08 | Leviton Manufacturing Co., Inc. | Lampholder with occupancy sensor |
| US8444309B2 (en) | 2010-08-13 | 2013-05-21 | Leviton Manufacturing Company, Inc. | Wiring device with illumination |
| US8526144B2 (en) | 2011-03-31 | 2013-09-03 | Leviton Manufacturing Company, Inc. | Reset lockout with grounded neutral test |
| US9551751B2 (en) | 2011-06-15 | 2017-01-24 | Ul Llc | High speed controllable load |
| US10054631B2 (en) | 2015-09-21 | 2018-08-21 | Advent Design Corporation | Electrical arcing detector for arcing at series electrictrical connection |
| EP3361587B1 (en) * | 2017-02-10 | 2020-11-25 | Airbus Operations GmbH | Protection and fault detection for high voltage power lines on aircraft |
| IT201800002111A1 (it) * | 2018-01-29 | 2019-07-29 | Abb Schweiz Ag | Metodo di rilevazione di un fenomeno di arco elettrico in una linea elettrica di bassa tensione. |
| DE102023209506A1 (de) * | 2023-09-28 | 2025-04-03 | Siemens Aktiengesellschaft | Ladevorrichtung für ein Elektrofahrzeug und Verfahren zum Laden eines Elektrofahrzeugs |
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| US2808566A (en) * | 1953-01-12 | 1957-10-01 | Sierra Electronic Corp | Directional apparatus for use with high frequency transmission lines |
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| NL7008914A (cg-RX-API-DMAC7.html) * | 1970-06-18 | 1971-12-21 | ||
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| SE368092B (cg-RX-API-DMAC7.html) * | 1972-11-06 | 1974-06-17 | Asea Ab | |
| JPS4970183A (cg-RX-API-DMAC7.html) * | 1972-11-10 | 1974-07-06 | ||
| US3911323A (en) * | 1974-02-19 | 1975-10-07 | Westinghouse Electric Corp | Ground fault protector with arcing fault indicator |
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-
1991
- 1991-03-28 US US07/676,739 patent/US5185687A/en not_active Expired - Lifetime
-
1992
- 1992-03-23 EP EP19920302473 patent/EP0506319A3/en not_active Ceased
- 1992-03-25 KR KR1019920004807A patent/KR920019036A/ko not_active Abandoned
- 1992-03-26 TW TW081102317A patent/TW228619B/zh active
- 1992-03-27 AU AU13862/92A patent/AU645229B2/en not_active Ceased
- 1992-03-30 JP JP4103710A patent/JPH05180895A/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109100615A (zh) * | 2018-10-19 | 2018-12-28 | 河海大学 | 一种基于频率特性的电缆故障定位方法 |
| CN109100615B (zh) * | 2018-10-19 | 2019-11-26 | 河海大学 | 一种基于频率特性的电缆故障定位方法 |
| KR102284521B1 (ko) * | 2021-06-30 | 2021-08-02 | 상도일렉트릭 주식회사 | 휴대형 아크 펄스 탐지 장치 및 그에 고주파 펄스를 인가하기 위한 펄스 발신기 |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1386292A (en) | 1992-10-01 |
| EP0506319A3 (en) | 1993-05-26 |
| KR920019036A (ko) | 1992-10-22 |
| TW228619B (cg-RX-API-DMAC7.html) | 1994-08-21 |
| EP0506319A2 (en) | 1992-09-30 |
| US5185687A (en) | 1993-02-09 |
| AU645229B2 (en) | 1994-01-06 |
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