DE69724870D1 - System zur Übertragung von Ausgangsfunktions-Zustandsindikatoren zwischen zwei oder mehreren Stromversorgungsschutzrelais - Google Patents
System zur Übertragung von Ausgangsfunktions-Zustandsindikatoren zwischen zwei oder mehreren StromversorgungsschutzrelaisInfo
- Publication number
- DE69724870D1 DE69724870D1 DE69724870T DE69724870T DE69724870D1 DE 69724870 D1 DE69724870 D1 DE 69724870D1 DE 69724870 T DE69724870 T DE 69724870T DE 69724870 T DE69724870 T DE 69724870T DE 69724870 D1 DE69724870 D1 DE 69724870D1
- Authority
- DE
- Germany
- Prior art keywords
- relay
- transmission
- power supply
- output function
- status indicators
- 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.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US655008 | 1996-05-29 | ||
US08/655,008 US5793750A (en) | 1995-10-20 | 1996-05-29 | System of communicating output function status indications between two or more power system protective relays |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69724870D1 true DE69724870D1 (de) | 2003-10-23 |
DE69724870T2 DE69724870T2 (de) | 2004-07-15 |
Family
ID=24627118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69724870T Expired - Fee Related DE69724870T2 (de) | 1996-05-29 | 1997-05-27 | System zur Übertragung von Ausgangsfunktions-Zustandsindikatoren zwischen zwei oder mehreren Stromversorgungsschutzrelais |
Country Status (9)
Country | Link |
---|---|
US (1) | US5793750A (de) |
EP (1) | EP0810714B1 (de) |
CN (1) | CN1155290C (de) |
AT (1) | ATE250293T1 (de) |
CA (1) | CA2206562C (de) |
DE (1) | DE69724870T2 (de) |
DK (1) | DK0810714T3 (de) |
ES (1) | ES2206660T3 (de) |
PT (1) | PT810714E (de) |
Families Citing this family (66)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19605022A1 (de) * | 1996-01-31 | 1997-08-07 | Siemens Ag | Verfahren zum Erfassen eines Fehlers auf einem zu überwachenden Leitungsabschnitt einer elektrischen Übertragungsleitung nach dem Distanzschutzprinzip |
US6018449A (en) | 1996-12-04 | 2000-01-25 | Energyline Systems, L.P. | Method for automated reconfiguration of a distribution system using distributed control logic and communications |
US6347027B1 (en) | 1997-11-26 | 2002-02-12 | Energyline Systems, Inc. | Method and apparatus for automated reconfiguration of an electric power distribution system with enhanced protection |
US6005757A (en) * | 1998-05-11 | 1999-12-21 | Eaton Corporation | Electrical switching device or trip unit acquiring predetermined settings from another electrical switching device or trip unit |
US6469629B1 (en) | 1999-02-12 | 2002-10-22 | General Electric Company | Distributed logic in multiple protective relays |
US6496342B1 (en) | 1999-02-12 | 2002-12-17 | Bitronics Inc. | Distributed monitoring and protection system for a distributed power network |
US6459998B1 (en) * | 1999-07-24 | 2002-10-01 | Gary R. Hoffman | Sensing downed power lines |
CA2317995C (en) * | 2000-06-30 | 2011-11-15 | S&C Electric Company | Methods and arrangements to detect and respond to faults in electrical power distribution equipment and systems |
US6940935B2 (en) * | 2001-04-05 | 2005-09-06 | Schweitzer Engineering Laboratories, Inc. | System and method for aligning data between local and remote sources thereof |
US8576527B2 (en) | 2001-07-06 | 2013-11-05 | Schweitzer Engineering Laboratoris Inc | Apparatus, system, and method for creating one or more slow-speed communications channels utilizing a real-time communication channel |
US8111492B2 (en) * | 2001-07-06 | 2012-02-07 | Schweitzer Engineering Laboratories, Inc. | Apparatus, system, and method for creating one or more slow-speed communications channels utilizing a real-time communication channel |
US7701683B2 (en) * | 2001-07-06 | 2010-04-20 | Schweitzer Engineering Laboratories, Inc. | Apparatus, system, and method for sharing output contacts across multiple relays |
US7463467B2 (en) * | 2001-07-06 | 2008-12-09 | Schweitzer Engineering Laboratories, Inc. | Relay-to-relay direct communication system and method in an electric power system |
US7460347B2 (en) * | 2001-07-06 | 2008-12-02 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for performing a redundancy check using intelligent electronic devices in an electric power system |
US6608742B2 (en) * | 2001-07-06 | 2003-08-19 | Schweitzer Engineering Laboratories, Inc. | Voltage and current source selection system for use in the protection, automation and control of an electric power system |
JP3822475B2 (ja) * | 2001-09-14 | 2006-09-20 | 三菱電機株式会社 | 電力系統管理方法及び電力系統管理システム |
DE50210750D1 (de) * | 2002-02-12 | 2007-10-04 | Abb Schweiz Ag | Empfang von Schutzbefehlen in einem Fernauslösegerät |
US6754789B2 (en) | 2002-02-22 | 2004-06-22 | Mcgraw-Edison Company | Distributed fault resilient shared memory |
US7110231B1 (en) | 2002-08-30 | 2006-09-19 | Abb Inc. | Adaptive protection system for a power-distribution network |
US6816757B1 (en) | 2002-09-19 | 2004-11-09 | Abb Technology Ag | Control unit for a power-distribution network |
US6839210B2 (en) * | 2002-10-25 | 2005-01-04 | Schweitzer Engineering Laboratories, Inc. | Bus total overcurrent system for a protective relay |
WO2004061462A1 (en) * | 2002-12-23 | 2004-07-22 | Power Measurement Ltd. | Power monitoring integrated circuit with communication interface |
US7123459B2 (en) * | 2003-04-07 | 2006-10-17 | Schweitzer Engineering Laboratories, Inc. | Protective relay capable of protection applications without protection settings |
US20060224336A1 (en) * | 2005-04-05 | 2006-10-05 | Charles Petras | System and method for transmitting power system data over a wide area network |
US20060259255A1 (en) * | 2005-04-05 | 2006-11-16 | Anderson James C | Method of visualizing power system quantities using a configurable software visualization tool |
CN101278473B (zh) * | 2005-09-02 | 2014-12-31 | 西门子工业公司 | 监控电力传输系统的方法和操作或监控功率单元的方法 |
US7460590B2 (en) * | 2005-09-14 | 2008-12-02 | Schweitzer Engineering Laboratories, Inc. | Handheld communication tester and method for testing direct serial communication capability of an intelligent electronic device in a power system |
CA2620828A1 (en) * | 2005-09-19 | 2007-03-29 | Schweitzer Engineering Laboratories, Inc. | Method and apparatus for routing data streams among intelligent electronic devices |
US7755872B2 (en) * | 2006-09-14 | 2010-07-13 | Schweitzer Engineering Laboratories, Inc. | System, method and device to preserve protection communication active during a bypass operation |
US20080170508A1 (en) * | 2007-01-17 | 2008-07-17 | Abb Technology Ag | Channel integrity metric calculation |
US8321162B2 (en) * | 2007-10-09 | 2012-11-27 | Schweitzer Engineering Laboratories Inc | Minimizing circulating current using time-aligned data |
US8405944B2 (en) * | 2007-10-09 | 2013-03-26 | Schweitzer Engineering Laboratories Inc | Distributed bus differential protection using time-stamped data |
MX2010002162A (es) | 2007-10-09 | 2010-06-02 | Schweitzer Engineering Lab Inc | Monitor de angulo de energia. |
US9401839B2 (en) * | 2008-04-04 | 2016-07-26 | Schweitzer Engineering Laboratories, Inc. | Generation and control of network events and conversion to SCADA protocol data types |
US20090296583A1 (en) * | 2008-05-29 | 2009-12-03 | Dolezilek David J | Systems, Methods, and Apparatus for Recording Network Events Associated with a Power Generation or Delivery System |
US20090307233A1 (en) * | 2008-06-02 | 2009-12-10 | Guorui Zhang | Efficient Handling of PMU Data for Wide Area Power System Monitoring and Visualization |
US8437969B2 (en) * | 2009-03-31 | 2013-05-07 | Virginia Polytechnic Institute And State University | Accurate magnetic field sensor and method for wireless phasor measurement unit |
US8427131B2 (en) * | 2009-06-12 | 2013-04-23 | Schweitzer Engineering Laboratories Inc | Voltage regulation at a remote location using measurements from a remote metering device |
US9256232B2 (en) | 2009-06-12 | 2016-02-09 | Schweitzer Engineering Laboratories, Inc. | Voltage regulation using multiple voltage regulator controllers |
US8275485B2 (en) * | 2009-08-10 | 2012-09-25 | Schweitzer Engineering Laboratories, Inc. | Electric power system automation using time coordinated instructions |
US8476874B2 (en) * | 2009-10-13 | 2013-07-02 | Schweitzer Engineering Laboratories, Inc | Systems and methods for synchronized control of electrical power system voltage profiles |
KR101425699B1 (ko) * | 2010-05-07 | 2014-08-01 | 엘에스산전 주식회사 | 디지털 보호 계전기의 원방 통신 방법 |
US8565229B2 (en) | 2010-06-18 | 2013-10-22 | Schweitzer Engineering Laboratories Inc | Systems and methods for data packet transmission |
US8791704B2 (en) | 2011-10-11 | 2014-07-29 | Schweitzer Engineering Laboratories Inc. | Fault-type identification for electric power delivery systems |
US8990604B2 (en) * | 2011-10-14 | 2015-03-24 | Apple Inc. | Alternately sensing voltage on supply side or load side of a power gate of an electronic device and modifying feedback input of a power supply controlled by the power gate based on which side of the power gate is currently sensed |
US8912792B2 (en) | 2012-08-24 | 2014-12-16 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for rotor angle measurement in an electrical generator |
US9383735B2 (en) | 2012-10-04 | 2016-07-05 | Schweitzer Engineering Laboratories, Inc. | Distributed coordinated electric power delivery control system using component models |
US9128140B2 (en) | 2013-09-16 | 2015-09-08 | Schweitzer Engineering Laboratories, Inc. | Detection of a fault in an ungrounded electric power distribution system |
US9985860B2 (en) | 2013-09-23 | 2018-05-29 | Schweitzer Engineering Laboratories, Inc. | Selection and display of polled and streamed electric power system measurements |
US10317467B2 (en) | 2014-05-19 | 2019-06-11 | Schweitzer Engineering Laboratories, Inc. | Synchronous machine monitoring and determination of a loss-of-field event using time stamped electrical and mechanical data |
US9568516B2 (en) | 2014-09-23 | 2017-02-14 | Schweitzer Engineering Laboratories, Inc. | Determining status of electric power transmission lines in an electric power transmission system |
US10063124B2 (en) | 2015-12-10 | 2018-08-28 | Schweitzer Engineering Laboratories, Inc. | Shaft mounted monitor for rotating machinery |
US9800055B2 (en) | 2016-01-21 | 2017-10-24 | Schweitzer Engineering Laboratories, Inc. | Synchronization of generators using a common time reference |
US10523150B2 (en) | 2016-09-15 | 2019-12-31 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for motor slip calculation using shaft-mounted sensors |
US10333301B2 (en) | 2017-05-04 | 2019-06-25 | Schweitzer Engineering Laboratories, Inc. | Transient simulation modeling for dynamic remedial action schemes using real-time protection setting updates |
US10664553B2 (en) | 2017-10-06 | 2020-05-26 | Schweitzer Engineering Laboratories, Inc. | Generating a representation of high-frequency signal data from an electric power delivery system |
US10859639B2 (en) | 2018-10-02 | 2020-12-08 | Schweitzer Engineering Laboratories, Inc. | Fault-type identification in an electric power delivery system using composite signals |
US10992134B2 (en) | 2019-05-10 | 2021-04-27 | Schweitzer Engineering Laboratories, Inc. | Load shedding system for both active and reactive power based on system perturbation |
US11258249B2 (en) * | 2019-10-12 | 2022-02-22 | Schweitzer Engineering Laboratories, Inc. | Primary and system protection for an electric power delivery system |
US11035891B1 (en) | 2020-03-06 | 2021-06-15 | Schweitzer Engineering Laboratories, Inc. | Electric power system voltage monitoring and control with energy packets |
US11592498B2 (en) | 2020-10-02 | 2023-02-28 | Schweitzer Engineering Laboratories, Inc. | Multi-phase fault identification in capacitor banks |
US11949222B2 (en) | 2021-01-26 | 2024-04-02 | Schweitzer Engineering Laboratories, Inc. | Sample time offset alignment of electric power system samples independent of a common time source |
US11808824B2 (en) | 2021-03-17 | 2023-11-07 | Schweitzer Engineering Laboratories, Inc. | Systems and methods to identify open phases of a capacitor bank |
US11677663B2 (en) | 2021-08-12 | 2023-06-13 | Schweitzer Engineering Laboratories, Inc. | Software-defined network statistics extension |
US20230068739A1 (en) | 2021-08-26 | 2023-03-02 | Schweitzer Engineering Laboratories, Inc. | Event analysis and display |
US11882002B2 (en) | 2022-06-22 | 2024-01-23 | Schweitzer Engineering Laboratories, Inc. | Offline test mode SDN validation |
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US4020396A (en) * | 1975-02-07 | 1977-04-26 | Westinghouse Electric Corporation | Time division multiplex system for a segregated phase comparison relay system |
US4551718A (en) * | 1983-06-24 | 1985-11-05 | Tetragenics, Inc. | Method and apparatus for transmitting status information between remote locations |
JPS6025336A (ja) * | 1983-07-21 | 1985-02-08 | Hitachi Ltd | キャリヤリレー装置 |
FR2583930B1 (fr) * | 1985-06-25 | 1994-02-25 | Enertec | Procede et dispositif de controle de la transmission de signaux de protection differentielle |
DE3537072A1 (de) * | 1985-10-15 | 1987-04-16 | Siemens Ag | Signaluebertragungsanordnung fuer eine vergleichsschutzeinrichtung |
JPH0260422A (ja) * | 1988-08-23 | 1990-02-28 | Nissin Electric Co Ltd | 事故区間検出制御装置 |
JP2694993B2 (ja) * | 1989-02-22 | 1997-12-24 | 株式会社日立製作所 | 電力用信号処理システムおよびディジタル保護リレー装置 |
US5235599A (en) * | 1989-07-26 | 1993-08-10 | Nec Corporation | Self-healing network with distributed failure restoration capabilities |
US4972290A (en) * | 1989-09-29 | 1990-11-20 | Abb Power T & D Company Inc. | Electric power system with remote monitoring and control of protective relays |
US5267231A (en) * | 1991-07-03 | 1993-11-30 | Abb Power T&D Company Inc. | Digital communication channel interface |
US5218465A (en) * | 1991-09-03 | 1993-06-08 | Motorola, Inc. | Intelligent interconnects for broadband optical networking |
US5341268A (en) * | 1991-12-16 | 1994-08-23 | Kabushiki Kaisha Toshiba | Method of and system for disconnecting faulty distribution line section from power distribution line |
US5283781A (en) * | 1991-12-23 | 1994-02-01 | Square D Company | Apparatus for receiving and modifying a serial data packet from a communications network to indicate its status |
US5311508A (en) * | 1991-12-23 | 1994-05-10 | Square D Company | Apparatus for receiving and decoding a serial data packet containing the status of a network of single point I/O devices |
JP3332474B2 (ja) * | 1993-05-31 | 2002-10-07 | 株式会社日立製作所 | Atm通信装置および故障検出通知装置 |
US5576625A (en) * | 1994-02-07 | 1996-11-19 | Kabushiki Kaisha Toshiba | Test method and apparatus for testing a protective relay system |
US5481532A (en) * | 1994-06-29 | 1996-01-02 | General Electric Company | Mobile telecommunications device and service |
-
1996
- 1996-05-29 US US08/655,008 patent/US5793750A/en not_active Expired - Lifetime
-
1997
- 1997-05-27 ES ES97303572T patent/ES2206660T3/es not_active Expired - Lifetime
- 1997-05-27 AT AT97303572T patent/ATE250293T1/de not_active IP Right Cessation
- 1997-05-27 DK DK97303572T patent/DK0810714T3/da active
- 1997-05-27 EP EP97303572A patent/EP0810714B1/de not_active Revoked
- 1997-05-27 PT PT97303572T patent/PT810714E/pt unknown
- 1997-05-27 DE DE69724870T patent/DE69724870T2/de not_active Expired - Fee Related
- 1997-05-29 CN CNB97113054XA patent/CN1155290C/zh not_active Expired - Fee Related
- 1997-05-29 CA CA002206562A patent/CA2206562C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN1155290C (zh) | 2004-06-23 |
CA2206562C (en) | 1999-10-19 |
PT810714E (pt) | 2004-02-27 |
DK0810714T3 (da) | 2003-10-20 |
EP0810714B1 (de) | 2003-09-17 |
ATE250293T1 (de) | 2003-10-15 |
US5793750A (en) | 1998-08-11 |
EP0810714A2 (de) | 1997-12-03 |
ES2206660T3 (es) | 2004-05-16 |
DE69724870T2 (de) | 2004-07-15 |
CA2206562A1 (en) | 1997-11-29 |
CN1171714A (zh) | 1998-01-28 |
EP0810714A3 (de) | 1998-10-07 |
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