DE334797C - Arrangement to prevent the occurrence of dangerous earth fault currents - Google Patents

Arrangement to prevent the occurrence of dangerous earth fault currents

Info

Publication number
DE334797C
DE334797C DENDAT334797D DE334797DD DE334797C DE 334797 C DE334797 C DE 334797C DE NDAT334797 D DENDAT334797 D DE NDAT334797D DE 334797D D DE334797D D DE 334797DD DE 334797 C DE334797 C DE 334797C
Authority
DE
Germany
Prior art keywords
arrangement
occurrence
prevent
fault currents
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.)
Expired
Application number
DENDAT334797D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schuckertwerke AG
Original Assignee
Siemens Schuckertwerke AG
Publication date
Application granted granted Critical
Publication of DE334797C publication Critical patent/DE334797C/en
Expired legal-status Critical Current

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
    • H02H3/16—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 fault current to earth, frame or mass

Landscapes

  • Measurement Of Resistance Or Impedance (AREA)

Description

Wenn in Hochspannungsanlagen Erdungen angeordnet sind und beim Auftreten irgendwelcher Störungen starke Ströme diese Erdung durchfließen, so werden an der Oberfläche des Erdreiches Spannungen erzeugt, die unter Umständen eine solche Höhe erreichen, daß das Betreten der betreffenden Stelle für den Menschen gefährlich ist. Durch die Erfindung wird die Aufgabe gelöst, daß die die Erdung durchfließenden Ströme ein bestimmtes ungefährliches Maß nicht überschreiten können. Hierzu wird von der Tatsache Gebrauch gemacht, daß die Spannungen an der Erdoberfläche sowohl von der Stromstärke abhängig sind, die die Erdung durchfließt, als auch von dem spezifischen Widerstand des Erdreiches selber, also von dessen Feuchtigkeitszustand.If earthings are arranged in high-voltage systems and if any Disturbances strong currents flow through this grounding, so on the surface of the Earth creates tensions that can reach such a height that walking the place concerned is dangerous for humans. The invention is the Problem solved that the currents flowing through the ground a certain harmless Cannot exceed dimension. For this purpose, use is made of the fact that the Tensions on the earth's surface are both dependent on the strength of the current that the grounding flows through, as well as of the specific resistance of the soil itself, that is, of its Moisture condition.

Nach der Erfindung wird nun an denjenigen Stellen, an denen ein Schutz als besonders notwendig erachtet wird, ein Paar Leiter (Sonden) an den Boden· angelegt oder in die Erde eingeführt und zwischen die Leiter ein Relais oder eine ähnliche Vorrichtung eingebaut, die bei Überschreiten einer bestimmten zulässigen Spannung den zur Erde fließenden Strom unterbricht und damit die Gefahr aufhebt.According to the invention is now at those points where protection is particularly necessary is deemed to have a pair of conductors (probes) placed in the ground or inserted into the ground and installed between the conductors a relay or similar device, which when exceeded a certain permissible voltage interrupts the current flowing to earth and so that the danger disappears.

In der Figur ist eine solche Anordnung, für zwei Sonden αλ a2 dargestellt, die an der zu schützenden Stelle & beispielsweise im Abstand von ι m in den Boden eingetrieben werden. Durch die Leitung c ist das Hochspannungsnetz mit der Haupterdung d verbunden. Zwischen den Sonden Ci1 a2 sind die Windungen e eines Relais eingeschaltet, dessen Kern f auf einen Schalter g in der Erdleitung c einwirkt. Sobald die an der Stelle b auftretende Spannung zu hoch wird, durchfließt die Windungen e des Relais genügend Strom, um die Erdleitung c mittels des Schalters g zu unterbrechen.The figure shows such an arrangement for two probes α λ a 2 , which are driven into the ground at the point to be protected & for example at a distance of ι m. The high-voltage network is connected to the main earth d through the line c. The windings e of a relay are switched on between the probes Ci 1 a 2 , the core f of which acts on a switch g in the earth line c. As soon as the voltage occurring at point b becomes too high, enough current flows through the windings e of the relay to interrupt the earth line c by means of the switch g.

Anstatt die Erdleitung c unmittelbar zu unterbrechen, kann man auch die vom Transformator kommenden Zuleitungen oder die ganze Anlage mittels des Relais e abschalten.Instead of interrupting the earth line c immediately, the supply lines coming from the transformer or the entire system can also be switched off by means of the relay e.

Claims (1)

Patent-Anspruch:Patent claim: Anordnung zum Verhindern des Auftretens gefährlicher Erdschlußströme, dadurch gekennzeichnet, daß an den zu schützenden Stellen an die Erdoberfläche elektrische Leiter (Sonden) in einem bestimmten Abstand angelegt werden und daß zwischen die Leiter Relais geschaltet sind, die den Erdstrom beim Überschreiten eines zulässigen Wertes unterbrechen.Arrangement to prevent the occurrence of dangerous earth fault currents, thereby characterized in that at the places to be protected to the earth's surface electrical Conductors (probes) are placed at a certain distance and that between the Conductor relays are switched, which the earth current when exceeding a permissible Interrupt value. Hierzu ι Blatt Zeichnungen.For this purpose ι sheet of drawings.
DENDAT334797D Arrangement to prevent the occurrence of dangerous earth fault currents Expired DE334797C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE334797T

Publications (1)

Publication Number Publication Date
DE334797C true DE334797C (en) 1921-03-23

Family

ID=6218615

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT334797D Expired DE334797C (en) Arrangement to prevent the occurrence of dangerous earth fault currents

Country Status (1)

Country Link
DE (1) DE334797C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0387385A1 (en) * 1989-03-17 1990-09-19 Siemens Aktiengesellschaft Earthing terminal cutoff relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0387385A1 (en) * 1989-03-17 1990-09-19 Siemens Aktiengesellschaft Earthing terminal cutoff relay

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