DE349975C - Device for switching off faulty lines in electrical distribution systems with an earth wire - Google Patents
Device for switching off faulty lines in electrical distribution systems with an earth wireInfo
- Publication number
- DE349975C DE349975C DENDAT349975D DE349975DD DE349975C DE 349975 C DE349975 C DE 349975C DE NDAT349975 D DENDAT349975 D DE NDAT349975D DE 349975D D DE349975D D DE 349975DD DE 349975 C DE349975 C DE 349975C
- Authority
- DE
- Germany
- Prior art keywords
- earth wire
- switching
- distribution systems
- electrical distribution
- earth
- 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
- 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
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
Die Erfindung bezieht sich auf elektrische Hochspannungsverteilungsanlagen, bei denen ein Erdseil verlegt ist. Sie besteht darin, daß an den Strackenenden der Anlage, wo die Verbrauchsleitungen abzweigen, in das Erdseil Stromrichtungsrelais eingeschaltet sind, die die Auslösung der zugehörigen Streckenschalter veranlassen, wenn an irgendeiner Stelle der Anlage ein Fehler, beispielsweise ein Erdschlußauftritt. The invention relates to electrical high-voltage distribution systems in which an earth rope is laid. It consists in the fact that at the ends of the system, where the consumption lines branch off, in the earth wire current direction relays are switched on, which trigger the associated section switch cause if an error, for example an earth fault, occurs at any point in the system.
In der Abbildung ist eine AusführungsformIn the figure is an embodiment
der Erfindung schematisch dargestellt für ein Stück einer Leitung, das einem Ringnetz oder einer einfachen Verteilungsanlage angehören kann.of the invention shown schematically for a piece of a line that is a ring network or can belong to a simple distribution system.
a, b, c sind Leitungsstrecken (z. B. Drehstromleitungen), von denen der Strom an den Verteilungsstellen d und e nach den Verbraucherleitungen f und g fließt. Das Erdseil h ist in bekannter Weise an die Gittefmaste der Verteilungsanlage angeschlossen. Rechts und links von den Anschlußpunkten an den Verteilungsstellen d und e sind Stromrichtungsrelais i, k, m, η in das Erdseil h eingeschaltet, die den Streckenschaltern f,q, r, s entsprechen und von denen die Relais i und m auf Strom der einen Richtung, k und η auf Strom der andern Richtung ansprechen. a, b, c are line sections (e.g. three-phase lines) from which the current flows at distribution points d and e to consumer lines f and g . The earth wire h is connected in a known manner to the gitter masts of the distribution system. To the right and left of the connection points at the distribution points d and e, current direction relays i , k, m, η are switched into the earth wire h , which correspond to the section switches f, q, r, s and of which the relays i and m are connected to the current of one Direction, k and η respond to current in the other direction.
Die Einrichtung wirkt in folgender Weise: Es sei angenommen, daß die Leitungen einem Ringnetz angehören und daß bei t ein Erdschluß aufgetreten ist. Dann fließt von beiden Seiten ein Strom nach dem Fehler t und zur Erde, von wo er nach links und rechts in das Erdseil fließt. Die Stromrichtungsrelais k und m, deren zugehörige Schalter q und r die beschädigte Leitungsstrecke eingrenzen, sprechen an und schließen die Auslösestromkreise der Schalter q und r. Die benachbarten Stromrichtungsrelais i bzw. η sprechen auf Strom in der Pfeilrichtung nicht an, schalten also die zugehörigen Schalter φ und s nicht ab. In den weiteren Relais ν und w ist der Strom zu schwach, um noch eine Wirkung hervorzubringen.The device works in the following way: It is assumed that the lines belong to a ring network and that a ground fault has occurred at t. Then a current flows from both sides after the fault t and to the earth, from where it flows to the left and right into the earth wire. The converting relays k and m, whose associated switches q and r delimit the damaged line, respond and close the tripping circuits of switches q and r. The neighboring current direction relays i or η do not respond to current in the direction of the arrow, so they do not switch off the associated switches φ and s. In the other relays ν and w , the current is too weak to have any effect.
Auch wenn es sich um eine einfache einseitig gespeiste Verteilungsanlage handelt, wirkt die Einrichtung in gleicher Weise. Der Erdstrom fließt wie oben beschrieben nach rechts und links in das Erdseil und bringt die beiden nächstliegenden Stromrichtungsrelais zum Ansprechen.Even if it is a simple single-ended distribution system, it works Establishment in the same way. The earth current flows to the right and as described above left into the earth wire and activates the two closest current direction relays.
Die Einrichtung ist nicht auf Anlagen mit Freileitungen beschränkt, sondern kann auch bei Drehstromkabeln angewendet werden. Das Erdseil wird dann durch den Bleimantel oder die Eisenbewehrung dargestellt, und es müssen an den Verteilungsstellen die beiden Stromrichtungsrelais in Reihe mit der Bewehrung geschaltet werden.The facility is not limited to systems with overhead lines, but can also can be used for three-phase cables. The earth rope is then through the lead sheath or the iron reinforcement is shown, and the two current direction relays must be at the distribution points connected in series with the reinforcement.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE349975T |
Publications (1)
Publication Number | Publication Date |
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DE349975C true DE349975C (en) | 1922-03-11 |
Family
ID=6259152
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT349975D Expired DE349975C (en) | Device for switching off faulty lines in electrical distribution systems with an earth wire |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE349975C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2933627A (en) * | 1956-03-05 | 1960-04-19 | Asea Ab | Arrangement in power transmission networks with directly grounded neutral |
-
0
- DE DENDAT349975D patent/DE349975C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2933627A (en) * | 1956-03-05 | 1960-04-19 | Asea Ab | Arrangement in power transmission networks with directly grounded neutral |
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