ZA79137B - Protective relaying apparatus - Google Patents
Protective relaying apparatusInfo
- Publication number
- ZA79137B ZA79137B ZA00790137A ZA79137A ZA79137B ZA 79137 B ZA79137 B ZA 79137B ZA 00790137 A ZA00790137 A ZA 00790137A ZA 79137 A ZA79137 A ZA 79137A ZA 79137 B ZA79137 B ZA 79137B
- Authority
- ZA
- South Africa
- Prior art keywords
- protective relaying
- relaying apparatus
- protective
- relaying
- Prior art date
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
- H02H7/30—Staggered disconnection
-
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86878978A | 1978-01-12 | 1978-01-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA79137B true ZA79137B (en) | 1979-12-27 |
Family
ID=25352322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA00790137A ZA79137B (en) | 1978-01-12 | 1979-01-12 | Protective relaying apparatus |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5497748A (en) |
BR (1) | BR7900098A (en) |
DE (1) | DE2900654A1 (en) |
ES (1) | ES476633A1 (en) |
FR (1) | FR2414810A1 (en) |
GB (1) | GB2012505B (en) |
IT (1) | IT1110058B (en) |
MX (1) | MX145530A (en) |
SE (1) | SE436237B (en) |
ZA (1) | ZA79137B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63179736U (en) * | 1987-05-14 | 1988-11-21 | ||
SE459059B (en) * | 1987-09-16 | 1989-05-29 | Asea Ab | PROTECT FOR HIGH-RESISTANT EARTH ERRORS |
DE4439499C2 (en) * | 1994-10-27 | 1998-01-29 | Siemens Ag | Method for detecting an earth short on an electrical power transmission line |
US6453248B1 (en) * | 1998-07-21 | 2002-09-17 | Abb Inc. | High impedance fault detection |
AU755700B2 (en) * | 1999-11-29 | 2002-12-19 | Canon Kabushiki Kaisha | Power generation system, and method for installing the same |
ES2323994B1 (en) * | 2006-10-25 | 2010-05-13 | Universidad Del Pais Vasco-Euskal Herriko Unibertsitatea | ELECTRICAL LINE PROTECTION SYSTEM TO DETERMINE THE SENSE IN WHICH A FAILURE IS PRODUCED. |
FI126892B (en) * | 2016-05-23 | 2017-07-31 | Emtele Oy | Felströmindikator |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3539866A (en) * | 1967-10-11 | 1970-11-10 | Federal Pacific Electric Co | Multi-zone fault protection systems |
-
1979
- 1979-01-08 ES ES476633A patent/ES476633A1/en not_active Expired
- 1979-01-09 BR BR7900098A patent/BR7900098A/en unknown
- 1979-01-10 MX MX176245A patent/MX145530A/en unknown
- 1979-01-10 DE DE19792900654 patent/DE2900654A1/en not_active Withdrawn
- 1979-01-10 GB GB79866A patent/GB2012505B/en not_active Expired
- 1979-01-11 JP JP106879A patent/JPS5497748A/en active Pending
- 1979-01-11 SE SE7900254A patent/SE436237B/en unknown
- 1979-01-12 IT IT19231/79A patent/IT1110058B/en active
- 1979-01-12 FR FR7900814A patent/FR2414810A1/en active Pending
- 1979-01-12 ZA ZA00790137A patent/ZA79137B/en unknown
Also Published As
Publication number | Publication date |
---|---|
IT7919231A0 (en) | 1979-01-12 |
SE436237B (en) | 1984-11-19 |
GB2012505A (en) | 1979-07-25 |
DE2900654A1 (en) | 1979-07-19 |
FR2414810A1 (en) | 1979-08-10 |
ES476633A1 (en) | 1979-12-01 |
MX145530A (en) | 1982-03-02 |
IT1110058B (en) | 1985-12-23 |
BR7900098A (en) | 1979-08-07 |
JPS5497748A (en) | 1979-08-02 |
SE7900254L (en) | 1979-09-14 |
GB2012505B (en) | 1982-04-28 |
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