GB2018534A - Earth fault current protection device - Google Patents
Earth fault current protection deviceInfo
- Publication number
- GB2018534A GB2018534A GB7909534A GB7909534A GB2018534A GB 2018534 A GB2018534 A GB 2018534A GB 7909534 A GB7909534 A GB 7909534A GB 7909534 A GB7909534 A GB 7909534A GB 2018534 A GB2018534 A GB 2018534A
- Authority
- GB
- United Kingdom
- Prior art keywords
- protection device
- fault current
- current protection
- transformer
- earth fault
- 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.)
- Withdrawn
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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/332—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means responsive to dc component in the fault current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Transformers (AREA)
- Thermistors And Varistors (AREA)
Abstract
An earth leakage protection device comprises a differential current transformer 1 and a band-pass active filter F which receives the output of the transformer and supplies a signal having a substantially sinusoidal form despite distortion of the transformer output caused by the superposition of direct current components on the primary fault currents. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7810478A FR2422276A1 (en) | 1978-04-07 | 1978-04-07 | EARTH FAULT CURRENT PROTECTION DEVICE |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2018534A true GB2018534A (en) | 1979-10-17 |
Family
ID=9206878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7909534A Withdrawn GB2018534A (en) | 1978-04-07 | 1979-03-19 | Earth fault current protection device |
Country Status (9)
Country | Link |
---|---|
AR (1) | AR218368A1 (en) |
BR (1) | BR7902016A (en) |
DE (1) | DE2913096A1 (en) |
ES (1) | ES479391A1 (en) |
FR (1) | FR2422276A1 (en) |
GB (1) | GB2018534A (en) |
IT (1) | IT1119057B (en) |
PT (1) | PT69436A (en) |
ZA (1) | ZA791625B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0855779A2 (en) * | 1997-01-23 | 1998-07-29 | Siemens Aktiengesellschaft | Earth fault protection device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2481851A1 (en) * | 1980-04-30 | 1981-11-06 | Merlin Gerin | DEVICE FOR DIFFERENTIAL PROTECTION SENSITIVE TO A UNIDIRECTIONAL CURRENT |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3525019A (en) * | 1967-07-20 | 1970-08-18 | John Lansch | Power protection apparatus |
FR2081177A6 (en) * | 1970-03-13 | 1971-12-03 | Saparel | |
FR2087452A5 (en) * | 1970-05-20 | 1971-12-31 | Seine Ind Electr | |
CH532855A (en) * | 1970-07-23 | 1973-01-15 | Siemens Ag | Residual current circuit breaker |
FR2191319B1 (en) * | 1972-06-29 | 1976-03-12 | Radiotechnique Compelec | |
DE2611674A1 (en) * | 1976-03-19 | 1977-09-22 | Guenter Reichensperger | Protective circuit breaker system - has electronic earth resistance monitor and electronic faulty current monitor to control load circuit breaking |
-
1978
- 1978-04-07 FR FR7810478A patent/FR2422276A1/en active Granted
-
1979
- 1979-03-19 GB GB7909534A patent/GB2018534A/en not_active Withdrawn
- 1979-03-28 AR AR275971A patent/AR218368A1/en active
- 1979-04-02 DE DE19792913096 patent/DE2913096A1/en active Granted
- 1979-04-03 BR BR7902016A patent/BR7902016A/en unknown
- 1979-04-04 IT IT67706/79A patent/IT1119057B/en active
- 1979-04-04 PT PT69436A patent/PT69436A/en unknown
- 1979-04-05 ZA ZA791625A patent/ZA791625B/en unknown
- 1979-04-06 ES ES479391A patent/ES479391A1/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0855779A2 (en) * | 1997-01-23 | 1998-07-29 | Siemens Aktiengesellschaft | Earth fault protection device |
EP0855779A3 (en) * | 1997-01-23 | 1999-09-29 | Siemens Aktiengesellschaft | Earth fault protection device |
Also Published As
Publication number | Publication date |
---|---|
ZA791625B (en) | 1980-06-25 |
IT1119057B (en) | 1986-03-03 |
ES479391A1 (en) | 1980-01-01 |
AR218368A1 (en) | 1980-05-30 |
PT69436A (en) | 1979-05-01 |
DE2913096A1 (en) | 1979-10-18 |
BR7902016A (en) | 1979-11-27 |
FR2422276B1 (en) | 1980-09-05 |
IT7967706A0 (en) | 1979-04-04 |
DE2913096C2 (en) | 1989-07-27 |
FR2422276A1 (en) | 1979-11-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |