CA1017048A - Molded case circuit breakers utilizing saturating current transformers - Google Patents
Molded case circuit breakers utilizing saturating current transformersInfo
- Publication number
- CA1017048A CA1017048A CA189,235A CA189235A CA1017048A CA 1017048 A CA1017048 A CA 1017048A CA 189235 A CA189235 A CA 189235A CA 1017048 A CA1017048 A CA 1017048A
- Authority
- CA
- Canada
- Prior art keywords
- circuit breakers
- current transformers
- molded case
- case circuit
- saturating current
- 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
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
- H02H3/08—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 excess current
- H02H3/093—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 excess current with timing means
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
- H02H1/063—Arrangements for supplying operative power primary power being supplied by fault current
-
- 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
- H02H3/08—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 excess current
- H02H3/083—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 excess current for three-phase systems
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00327963A US3846675A (en) | 1973-01-30 | 1973-01-30 | Molded case circuit breakers utilizing saturating current transformers |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1017048A true CA1017048A (en) | 1977-09-06 |
Family
ID=23278872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA189,235A Expired CA1017048A (en) | 1973-01-30 | 1973-12-31 | Molded case circuit breakers utilizing saturating current transformers |
Country Status (12)
Country | Link |
---|---|
US (1) | US3846675A (ja) |
JP (2) | JPS49105144A (ja) |
AR (2) | AR201365A1 (ja) |
BE (1) | BE810339A (ja) |
BR (1) | BR7400577D0 (ja) |
CA (1) | CA1017048A (ja) |
DE (1) | DE2403903A1 (ja) |
ES (1) | ES422574A1 (ja) |
FR (1) | FR2215736A1 (ja) |
GB (1) | GB1462652A (ja) |
IT (1) | IT1005740B (ja) |
ZA (1) | ZA739581B (ja) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3959695A (en) * | 1975-04-29 | 1976-05-25 | Westinghouse Electric Corporation | Circuit interrupter with ground fault trip control |
ZA77581B (en) * | 1976-02-02 | 1977-12-28 | Square D Co | Solid state overload relay transformer circuit |
DE2704820A1 (de) * | 1977-02-05 | 1978-08-17 | Eller Vertriebs Ingbuero | Ueberlastschutzschaltung fuer elektrische motoren |
US4152744A (en) * | 1977-06-17 | 1979-05-01 | Gould Inc. | Solid state tripping circuit |
US4297741A (en) * | 1979-09-04 | 1981-10-27 | General Electric Company | Rate sensing instantaneous trip mode network |
US4597025A (en) * | 1980-07-10 | 1986-06-24 | Eaton Corporation | Minimum size, integral, A.C. overload current sensing, remote power controller |
DE3246329A1 (de) * | 1982-12-15 | 1984-06-20 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Elektronisches ueberstromrelais |
US4513342A (en) * | 1983-01-31 | 1985-04-23 | General Electric Company | Current-squared-time (i2 t) protection system |
US4796148A (en) * | 1985-10-25 | 1989-01-03 | S&C Electric Company | Current-sensing arrangement utilizing two current-sensing signals |
US4720775A (en) * | 1986-06-03 | 1988-01-19 | Qualidyne Systems, Inc. | Inverter having saturating current transformer core for maintaining inverter current above minimum predetermined level |
EP0300076A1 (en) * | 1987-07-23 | 1989-01-25 | Mitsubishi Denki Kabushiki Kaisha | Circuit breaker |
EP0300078B1 (en) * | 1987-07-23 | 1992-09-30 | Mitsubishi Denki Kabushiki Kaisha | Overcurrent detector and circuit breaker |
FR2626724B1 (fr) * | 1988-01-28 | 1993-02-12 | Merlin Gerin | Declencheur statique comportant un circuit de declenchement instantane independant de la tension d'alimentation |
JP2591096B2 (ja) * | 1988-08-26 | 1997-03-19 | 日本電気株式会社 | 電源投入回路 |
JPH0710145B2 (ja) * | 1989-10-04 | 1995-02-01 | 三菱電機株式会社 | 過電流保護装置 |
US5583732A (en) * | 1994-12-19 | 1996-12-10 | General Electric Company | Modular current transformer for electronic circuit interrupters |
US5774320A (en) * | 1996-10-24 | 1998-06-30 | General Electric Company | Modular current transformer for electronic circuit interrupters |
US5889450A (en) * | 1996-10-25 | 1999-03-30 | General Electric Company | Current transformer assembly for electronic circuit interrupters |
FR2790338B1 (fr) * | 1999-02-25 | 2001-05-04 | Schneider Electric Ind Sa | Declencheur electronique selectif |
US6760207B2 (en) | 2000-12-12 | 2004-07-06 | Tecumseh Products Company | Compressor terminal fault interruption method and apparatus |
DE10148815A1 (de) * | 2001-10-02 | 2003-04-10 | Abb Patent Gmbh | Verfahren und Einrichtung zur Stromwertermittlung unter Einsatz eines Stromwandlers, welcher im Bereich der Kernsättigung arbeitet |
US6757146B2 (en) * | 2002-05-31 | 2004-06-29 | Schweitzer Engineering Laboratories, Inc. | Instantaneous overcurrent element for heavily saturated current in a power system |
EP2043216B1 (en) * | 2006-07-19 | 2016-02-17 | Hitoshi Kijima | Separator |
US7373234B1 (en) | 2007-07-24 | 2008-05-13 | Delphi Technologies, Inc. | Method for determining solenoid control current using hysteresis interpolation for transmission clutch control |
CN102064536A (zh) * | 2010-12-08 | 2011-05-18 | 河南省电力公司许昌供电公司 | 一种电流保护方法 |
US10495680B2 (en) | 2017-06-14 | 2019-12-03 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for detecting current transformer ultrasaturation to enhance relay security and dependability |
US10811185B2 (en) | 2018-09-13 | 2020-10-20 | Analog Devices Global Unlimited Company | Saturation prevention of current transformer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3211958A (en) * | 1962-03-08 | 1965-10-12 | Gen Electric | Tripping arrangement for an electric circuit breaker |
US3343084A (en) * | 1963-06-20 | 1967-09-19 | Westinghouse Electric Corp | Hall generator system useful as integrating meter, demand meter and inverse current relay |
US3434011A (en) * | 1966-08-25 | 1969-03-18 | Ite Circuit Breaker Ltd | Saturating current transformer for static relays |
US3634729A (en) * | 1970-05-07 | 1972-01-11 | Westinghouse Electric Corp | Circuit breaker including improved overcurrent protective device |
-
1973
- 1973-01-30 US US00327963A patent/US3846675A/en not_active Expired - Lifetime
- 1973-12-19 ZA ZA739581A patent/ZA739581B/xx unknown
- 1973-12-31 CA CA189,235A patent/CA1017048A/en not_active Expired
-
1974
- 1974-01-24 ES ES422574A patent/ES422574A1/es not_active Expired
- 1974-01-28 BR BR577/74A patent/BR7400577D0/pt unknown
- 1974-01-28 GB GB381674A patent/GB1462652A/en not_active Expired
- 1974-01-28 DE DE2403903A patent/DE2403903A1/de active Pending
- 1974-01-29 JP JP49011558A patent/JPS49105144A/ja active Pending
- 1974-01-29 IT IT41530/74A patent/IT1005740B/it active
- 1974-01-29 FR FR7402837A patent/FR2215736A1/fr not_active Withdrawn
- 1974-01-30 BE BE140319A patent/BE810339A/xx unknown
- 1974-01-30 AR AR252137A patent/AR201365A1/es active
-
1975
- 1975-01-20 AR AR257358A patent/AR209920A1/es active
-
1979
- 1979-06-27 JP JP1979087074U patent/JPS54180245U/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US3846675A (en) | 1974-11-05 |
AR201365A1 (es) | 1975-03-07 |
FR2215736A1 (ja) | 1974-08-23 |
ZA739581B (en) | 1974-11-27 |
JPS49105144A (ja) | 1974-10-04 |
BE810339A (fr) | 1974-07-30 |
ES422574A1 (es) | 1976-10-01 |
DE2403903A1 (de) | 1974-08-08 |
AU6455074A (en) | 1975-07-17 |
IT1005740B (it) | 1976-09-30 |
GB1462652A (en) | 1977-01-26 |
BR7400577D0 (pt) | 1974-11-05 |
AR209920A1 (es) | 1977-06-15 |
JPS54180245U (ja) | 1979-12-20 |
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