IN190123B - - Google Patents

Info

Publication number
IN190123B
IN190123B IN1766CA1996A IN190123B IN 190123 B IN190123 B IN 190123B IN 1766CA1996 A IN1766CA1996 A IN 1766CA1996A IN 190123 B IN190123 B IN 190123B
Authority
IN
India
Prior art keywords
cycles
time constant
conditions
turn
power transmission
Prior art date
Application number
Other languages
English (en)
Inventor
B Jeffrey Roberts
Daqing Hou
Original Assignee
Schweitzer Engineering Lab Inc
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 Schweitzer Engineering Lab Inc filed Critical Schweitzer Engineering Lab Inc
Publication of IN190123B publication Critical patent/IN190123B/en

Links

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
    • H02H3/40—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 responsive to ratio of voltage and current
    • H02H3/402—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 responsive to ratio of voltage and current using homopolar quantities
    • 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
    • H02H3/006—Calibration or setting of parameters

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Networks Using Active Elements (AREA)
  • Credit Cards Or The Like (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
IN1766CA1996 1995-10-17 1996-10-07 IN190123B (el)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/544,274 US5790418A (en) 1995-10-17 1995-10-17 Adaptive polarizing memory voltage time constant

Publications (1)

Publication Number Publication Date
IN190123B true IN190123B (el) 2003-06-14

Family

ID=24171504

Family Applications (1)

Application Number Title Priority Date Filing Date
IN1766CA1996 IN190123B (el) 1995-10-17 1996-10-07

Country Status (10)

Country Link
US (1) US5790418A (el)
EP (1) EP0769835B1 (el)
CN (1) CN1078758C (el)
AT (1) ATE188815T1 (el)
DE (1) DE69606136T2 (el)
DK (1) DK0769835T3 (el)
ES (1) ES2141444T3 (el)
GR (1) GR3032344T3 (el)
IN (1) IN190123B (el)
PT (1) PT769835E (el)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5973734A (en) 1997-07-09 1999-10-26 Flashpoint Technology, Inc. Method and apparatus for correcting aspect ratio in a camera graphical user interface
US6317141B1 (en) 1998-12-31 2001-11-13 Flashpoint Technology, Inc. Method and apparatus for editing heterogeneous media objects in a digital imaging device
US6573726B1 (en) * 2000-05-02 2003-06-03 Schweitzer Engineering Laboratories, Inc. Sensitive ground fault detection system for use in compensated electric power distribution networks
US6833711B1 (en) * 2003-08-01 2004-12-21 Schweitzer Engineering Laboratories, Inc. Protective relay for powers systems having dependable out-of-step blocking capability
US9224145B1 (en) 2006-08-30 2015-12-29 Qurio Holdings, Inc. Venue based digital rights using capture device with digital watermarking capability
CN101127282B (zh) * 2007-06-08 2010-05-19 西安交通大学 基于可变电流控制的智能交流接触器控制单元
CN101183789B (zh) * 2007-10-25 2010-06-02 南京南瑞继保电气有限公司 适用于串联电容补偿线路的复合特性阻抗的设置方法
US10978866B2 (en) 2018-10-02 2021-04-13 Schweitzer Engineering Laboratories, Inc. Polarizing signal for electric power delivery system protection
US11271389B2 (en) 2020-06-24 2022-03-08 Schweitzer Engineering Laboratories, Inc. Distance protection using supervised sequence currents and voltages for electric power delivery systems
US11598800B2 (en) 2021-03-25 2023-03-07 Schweitzer Engineering Laboratories, Inc. Distance elements for line protection near unconventional sources

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5183147A (el) * 1975-01-20 1976-07-21 Tokyo Shibaura Electric Co
US4149210A (en) * 1977-09-09 1979-04-10 Westinghouse Electric Corp. Electrical apparatus including interlocking circuit for short-time delay and long-time delay tripping
US4161011A (en) * 1978-02-21 1979-07-10 General Electric Company Ground distance relay employing phase comparator measurement
JPS55127829A (en) * 1979-03-27 1980-10-03 Tokyo Shibaura Electric Co Digital distance relay unit
US4329727A (en) * 1980-07-16 1982-05-11 General Electric Company Directional power distance relay
US4405966A (en) * 1981-10-07 1983-09-20 General Electric Company System for providing protection for a high voltage transmission line
US4455612A (en) * 1982-01-27 1984-06-19 Iowa State University Research Foundation, Inc. Recursive estimation in digital distance relaying system
US4403268A (en) * 1982-01-28 1983-09-06 General Electric Company Protective relay having an improved characteristic angle adjustment circuit
US4420789A (en) * 1982-04-19 1983-12-13 General Electric Company Characteristic timer for a protective relay
US4438476A (en) * 1982-05-17 1984-03-20 General Electric Company Selectable integrating characteristic timer for protective relays
US4420788A (en) * 1982-07-29 1983-12-13 General Electric Company Phase relay for AC power transmission line protection
US4433353A (en) * 1982-07-29 1984-02-21 General Electric Company Positive sequence undervoltage distance relay
US4453191A (en) * 1982-07-29 1984-06-05 General Electric Company Overvoltage directional relay
JPS61112527A (ja) * 1984-11-07 1986-05-30 三菱電機株式会社 デイジタル距離継電器
JPH0812222B2 (ja) * 1985-11-08 1996-02-07 株式会社東芝 ディジタル故障点標定装置
US4751604A (en) * 1986-10-16 1988-06-14 General Electric Company Comparison signal error detector for protective relay system
CN87210350U (zh) * 1987-07-24 1988-10-26 国营天津纺织机械厂 相序及断相二用保护继电器
US4821137A (en) * 1987-11-12 1989-04-11 General Electric Company Positive sequence distance relay for AC power transmission line protection
US4819119A (en) * 1987-11-12 1989-04-04 General Electric Company Faulted phase selector for single pole tripping and reclosing schemes
US4825327A (en) * 1987-11-12 1989-04-25 General Electric Company Negative and zero sequence directional overcurrent unit for AC power transmission line protection
US4825323A (en) * 1987-11-12 1989-04-25 General Electric Company Out-of-step blocking unit
SE460804B (sv) * 1988-03-25 1989-11-20 Asea Brown Boveri Foerfarande och anordning foer felbestaemning vid fel paa en kraftledning
US5140492A (en) * 1990-04-11 1992-08-18 Schweitzer Engineering Laboratories, Inc. Distance relay using a polarizing voltage
JPH05137250A (ja) * 1991-10-21 1993-06-01 Hitachi Ltd 配電線停止極小化システム
US5410492A (en) 1992-01-29 1995-04-25 Arch Development Corporation Processing data base information having nonwhite noise

Also Published As

Publication number Publication date
US5790418A (en) 1998-08-04
ES2141444T3 (es) 2000-03-16
DE69606136T2 (de) 2000-05-25
PT769835E (pt) 2000-04-28
ATE188815T1 (de) 2000-01-15
DE69606136D1 (de) 2000-02-17
CN1166069A (zh) 1997-11-26
DK0769835T3 (da) 2000-05-08
EP0769835A1 (en) 1997-04-23
EP0769835B1 (en) 2000-01-12
CN1078758C (zh) 2002-01-30
GR3032344T3 (en) 2000-04-27

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