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Microprocessor-based protective relay system 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H02H-007/08
출원번호 US-0468320 (1990-01-22)
발명자 / 주소
  • Alley Robert P. (Clifton Park NY) Bicknell William H. (Ballston Lake NY)
출원인 / 주소
  • General Electric Company (Schenectady NY 02)
인용정보 피인용 횟수 : 38  인용 특허 : 0

초록

A microprocessor-based relay system is used in combination with relay contactors and a control circuit therefor to protect an electric motor from overload currents in addition to phase faults, ground faults, load losses, and load jams. The microprocessor is provided with a data base comprising therm

대표청구항

In an electric motor system having at least one phase and a main conductor connecting each phase of an electric motor to an ac power source, a protective relay system comprising: a plurality of current sensing means for sensing currents through the main conductors, each respective one of said curren

이 특허를 인용한 특허 (38)

  1. Scholtz, Ernst; Thorburn, Stefan; Haj-Maharsi, Mohamed Y., Adaptive provision of protection function settings of electrical machines.
  2. Benmouyal,Gabriel; Nguyen,Thanh Xuan Thi, Apparatus and method for detecting a brush liftoff in a synchronous generator rotor circuit.
  3. Lawson, Rodney Allen; Pearson, William Robert; Sanderson, Harold Copeland; Saleh, Mohammed Kassem; Sinha, Gautam; Freeman, Jr., Ivan Elmo; Gerritsen, Bruce Allen, Apparatus and method for detecting and calculating ground fault resistance.
  4. See,Alvin B.; Correa,Paulo, Apparatus, method and computer program product for monitoring AC line current through the step start resistors of a high voltage power supply.
  5. Otake Keizo (Aichi JPX), Device and method for detecting unbalanced condition in a load driven by a motor.
  6. Gerard Vilou FR, Device for controlling a starter for a motor vehicle.
  7. Swahn,H{dot over (a)}kan; Svensson,Bertil, Electric machine.
  8. Swahn,H?kan; Svensson,Bertil, Electric machine.
  9. Maddali, Vijay, Excessive voltage protector for a variable frequency generating system.
  10. Thompson, Michael J.; Finney, Dale S., Generator protection element.
  11. Bhavaraju, Vijay; Zhao, Tiefu; Theisen, Peter J., Hybrid bi-directional DC contactor and method of controlling thereof.
  12. Dougherty John J., Hybrid protective relay having enhanced contact response time.
  13. Boren, Steven G., Intelligent automatic bypass for a motor control device.
  14. Michael Ray Bryant ; Robert Dale Joyner ; William Glenn Sims, Interlock for use in an electric motor handle and contactor combination.
  15. Zane C. Eaton ; Jonathan D. Churchill, Method and apparatus for configuring a genset controller for operation with particular gensets.
  16. Eaton, Zane C.; Kaura, Vikram; Van Maaren, Richard D.; Dorn, Douglas W., Method and apparatus for preventing excessive heat generation in a alternator of a generator set.
  17. Eaton, Zane C.; Lindgren, Michael S.; Albsmeier, Eric, Method and apparatus for preventing excessive reaction to a load disturbance by a generator set.
  18. Dorn, Douglas W., Method and apparatus for regulating the excitation of an alternator of a genset.
  19. Schimanek,Ernst; Billmann,Markus, Method and circuit arrangement with adaptive overload protection for power switching devices.
  20. Kamen, Dean; Morrell, John B.; Robinson, David W.; Reich, Ronald K.; Heinzmann, John David; LeMay, Philip; Meyer, Steven R.; Sachs, Jason M.; Field, J. Douglas, Method and system for fail-safe motor operation.
  21. Kamen,Dean; Morrell,John B.; Robinson,David W.; Reich,Ronald K.; Heinzmann,John David; LeMay,Philip; Meyer,Steven R.; Sachs,Jason M.; Field,J. Douglas, Method and system for fail-safe motor operation.
  22. Jefferies, Kevin, Method for compensating overload trip curve for CT error.
  23. Schmaus, Stefan; Dietrich, Markus; Zimmermann, Martin; Moebs, Francis, Method for determining a fault in an electronically commutated electric motor.
  24. Hermann Hofmann DE; Rudiger Kutzner DE; Jorn Steinbrink DE, Method for limiting an electric current through an electrical component, and limiting apparatus.
  25. Hyvärinen, Ari; Tarkiainen, Antti; Laukkanen, Johanna, Method for thermal protection of frequency converter and a frequency converter.
  26. Hsieh, Ting-Chung; Liao, Shih-Chieh; Huang, Jen-Hsiang; Cheng, Lung-Jay, Method of detecting output phase loss for motor driver.
  27. Chung, Yong Ho, Multi-functional hybrid contactor.
  28. Bhavaraju, Vijay; Zhao, Tiefu; Theisen, Peter J., Photovotaic system including hybrid bi-directional DC contactors and method of detection and isolation of faults therein.
  29. Krupke, Leroy G.; Siegesmund, Mark Kenneth; Wilzbach, Mark Raymond, Predictive thermal protection for motors in barrier operator systems.
  30. Jeon, Byung Joon, Protective relaying system and method for gathering data using thereof.
  31. Padmanabh, Kumar; Chevuru, Sai Pawan Kumar; Paul, Sanjoy, System and method for protection of electrical appliances.
  32. Schweitzer, III, Edmund O.; Skendzic, Veselin; Benmouyal, Gabriel; Hall, Bruce A.; Scharlach, Rogerio, Systems and methods for generator ground fault protection.
  33. Jayanth, Nagaraj B.; Warner, Wayne R., Systems and methods for protecting three-phase motors.
  34. Jayanth, Nagaraj B.; Warner, Wayne R., Systems and methods for protecting three-phase motors.
  35. Shah, Saurabh B.; Garg, Kamal; Manson, Scott M., Systems and methods for protection of components in electrical power delivery systems.
  36. Shah, Saurabh B.; Garg, Kamal; Manson, Scott M., Systems and methods for protection of components in electrical power delivery systems.
  37. David R. Crecelius ; Richard J. Voss, Thermal protection device for a remotely regulated vehicle alternator.
  38. Georges, Bruno; Barbulescu, Mariana; Gagnon, Estelle; Beauchemin, Claude, Transformer management system and method.
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