FR2390841A1 - Earth fault protection circuit - has monitoring transformer and tripping coil in circuit contg. capacitor and inductor - Google Patents
Earth fault protection circuit - has monitoring transformer and tripping coil in circuit contg. capacitor and inductorInfo
- Publication number
- FR2390841A1 FR2390841A1 FR7714566A FR7714566A FR2390841A1 FR 2390841 A1 FR2390841 A1 FR 2390841A1 FR 7714566 A FR7714566 A FR 7714566A FR 7714566 A FR7714566 A FR 7714566A FR 2390841 A1 FR2390841 A1 FR 2390841A1
- Authority
- FR
- France
- Prior art keywords
- circuit
- inductor
- capacitor
- earth fault
- fault protection
- 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.)
- Granted
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The protection circuit, for protecting against effects caused by earth faults, consists of a transformer with a secondary winding (the primary is the line being monitored) and a release coil. The secondary and release coil form a release circuit. The release circuit contains a capacitor in series on in parallel with the secondary and release coil (which themselves may be in series or in parallel). A saturatable inductor is in series with both the release coil and the secondary or with just the release coil.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7714566A FR2390841A1 (en) | 1977-05-12 | 1977-05-12 | Earth fault protection circuit - has monitoring transformer and tripping coil in circuit contg. capacitor and inductor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7714566A FR2390841A1 (en) | 1977-05-12 | 1977-05-12 | Earth fault protection circuit - has monitoring transformer and tripping coil in circuit contg. capacitor and inductor |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2390841A1 true FR2390841A1 (en) | 1978-12-08 |
FR2390841B1 FR2390841B1 (en) | 1980-01-04 |
Family
ID=9190721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7714566A Granted FR2390841A1 (en) | 1977-05-12 | 1977-05-12 | Earth fault protection circuit - has monitoring transformer and tripping coil in circuit contg. capacitor and inductor |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2390841A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19523967A1 (en) * | 1995-06-30 | 1997-01-02 | Kopp Heinrich Ag | Earth current circuit-breaker for insulation monitoring of electric circuits |
-
1977
- 1977-05-12 FR FR7714566A patent/FR2390841A1/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19523967A1 (en) * | 1995-06-30 | 1997-01-02 | Kopp Heinrich Ag | Earth current circuit-breaker for insulation monitoring of electric circuits |
Also Published As
Publication number | Publication date |
---|---|
FR2390841B1 (en) | 1980-01-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse | ||
ST | Notification of lapse |