GB259978A - Improvements in detecting an earth in a high tension network - Google Patents
Improvements in detecting an earth in a high tension networkInfo
- Publication number
- GB259978A GB259978A GB25650/26A GB2565026A GB259978A GB 259978 A GB259978 A GB 259978A GB 25650/26 A GB25650/26 A GB 25650/26A GB 2565026 A GB2565026 A GB 2565026A GB 259978 A GB259978 A GB 259978A
- Authority
- GB
- United Kingdom
- Prior art keywords
- telephone
- detecting
- earth
- loudness
- condenser
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
259,978. Akt.-Ges. Brown, Boveri, et Cie. Oct. 14, 1925, [Convention date]. Addition to 253,478. Detecting, indicating, and locating faults.-In the system claimed in the parent Specification for selectively detecting a branch conductor affected by an earth in a high-tension network, acoustic devices are connected in the branch circuits for indicating the higher harmonics. A telephone H is connected in turn across the ammeters AR, AS. AT in the phase conductors R, S, T of a branch circuit Zw to be tested and indicates, by the loudness of the sound, the presence of higher harmonic currents due to a fault on one main. The loudness of the sound may be adjusted by means of a potentiometer resistance P. Currents of the fundamental frequency may be suppressed by connecting a condenser in series with the telephone, or by connecting a resistance in series with the telephone and a filter circuit, consisting of a condenser and inductance tuned to the fundamental frequency, in parallel with the telephone- The plug B may be replaced by a changeover switch with a rotating contact. The telephone receiver may be used in combination with soundamplifying devices.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE259978X | 1925-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB259978A true GB259978A (en) | 1927-09-29 |
Family
ID=5966955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25650/26A Expired GB259978A (en) | 1925-10-14 | 1926-10-14 | Improvements in detecting an earth in a high tension network |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB259978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006053567A2 (en) * | 2004-11-18 | 2006-05-26 | Nesa A/S | Compensation of simple fiberoptic faraday effect sensors |
-
1926
- 1926-10-14 GB GB25650/26A patent/GB259978A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006053567A2 (en) * | 2004-11-18 | 2006-05-26 | Nesa A/S | Compensation of simple fiberoptic faraday effect sensors |
| WO2006053567A3 (en) * | 2004-11-18 | 2007-11-01 | Nesa As | Compensation of simple fiberoptic faraday effect sensors |
| JP2008521374A (en) * | 2004-11-18 | 2008-06-19 | ドン・エナジー・セールス・アンド・ディストリビューション・アクティーゼルスカブ | Compensation for a simple fiber optic Faraday effect sensor |
| JP4869245B2 (en) * | 2004-11-18 | 2012-02-08 | パワーセンス・アクティーゼルスカブ | Compensation for a simple fiber optic Faraday effect sensor |
| US9247402B2 (en) | 2004-11-18 | 2016-01-26 | Powersense A/S | Compensation of simple fiber optic Faraday effect sensors |
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