AT47272B - Device for protecting underground metallic objects (e.g. pipes, cables) against earth currents with the help of an electrical protective circuit. - Google Patents

Device for protecting underground metallic objects (e.g. pipes, cables) against earth currents with the help of an electrical protective circuit.

Info

Publication number
AT47272B
AT47272B AT47272DA AT47272B AT 47272 B AT47272 B AT 47272B AT 47272D A AT47272D A AT 47272DA AT 47272 B AT47272 B AT 47272B
Authority
AT
Austria
Prior art keywords
pipes
help
cables
protective circuit
electrical protective
Prior art date
Application number
Other languages
German (de)
Inventor
Hermann Geppert
Original Assignee
Hermann Geppert
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hermann Geppert filed Critical Hermann Geppert
Application granted granted Critical
Publication of AT47272B publication Critical patent/AT47272B/en

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  • Prevention Of Electric Corrosion (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 
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   @eitung g, die Stromquelle f,   die Leitung e nach den Elektroden d und den   Pfeilen p folgend,   lurch die Erde nach den Schienen a und durch die   Leitung w   nach der Betriebsstromquelle i   : zurück.   
 EMI2.1 
   lynamo   oder der Oberleitung vermieden ist. 



   Unter Umständen können die Erdströme noch dadurch vermindert werden, dass beliebige Widerstände (z. B   Drahtwiderstände 8   in Fig. 1) eingeschaltet werden und die Anoden d klein oder schlecht leitend gemacht werden. 



   Ordnet man die im allgemeinen nur in der Nähe des Elektrizitätswerkes i getroffene Einrichtung gemäss der Erfindung-also die Anoden d, Leitungen   y und c   und   Elektrizitätsquelle     j-     ausserdem nochmals   in derselben Weise auf der Strecke der Bahn an, so trägt dies zur weiteren Verminderung   der schädlichen   Erdströme bei. 
 EMI2.2 
 eine Stromquelle t (Fig. 1 unten punktiert) und Anoden u besonders   geschützt   werden. 



   Die Anoden d und u werden je nach Umständen beliebig in die Erde gesenkt, sie können   SIC'il   auch auf der Oberfläche der Erde befinden, doch müssen sie in diesem Falle mit der Erde in   genügender   leitender Berührung sein. 



   Die Stärke des Stromes, welcher zwischen Anoden d, Rohrleitung b und Kabel c übergeht,   wird man der   Kostenersparnis wegen möglichst beschränken und deshalb die Anoden d den 
 EMI2.3 
 möglichst klein machen, damit ihr elektrischer Widerstand ein grosser wird und selbst bei   toiser   elektrischer Spannung nur ein schwacher Strom übergeht. 



   Um zwischen den Anoden d und der Erde besonders auch bei trockener Witterung eine ausgleichende leitende Berührung zu sichern, können die Anoden   d   mit feuchtem Ton, mit   durch     Salzlösung getränkter   Erde oder gleichwertigen Massen umgeben werden. Man wird sie zweckmässig auswechselbar oder aus wiederstandsfähigen Stoffen (z. B. Kohle, Nickel. Platin,   Uold)   
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  Die Wirkungsweise ist dieselbe wie oben beschrieben.



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   @line g, the power source f, the line e to the electrodes d and following the arrows p, through the earth to the rails a and through the line w to the operating power source i: back.
 EMI2.1
   lynamo or the overhead line is avoided.



   Under certain circumstances, the earth currents can be reduced by switching on any resistors (for example wire resistors 8 in FIG. 1) and making the anodes d small or poorly conductive.



   If the device according to the invention, which is generally only found in the vicinity of the power station i - that is, the anodes d, lines y and c and electricity source j - is also arranged again in the same way on the track, this contributes to a further reduction in the harmful earth currents.
 EMI2.2
 a power source t (Fig. 1 dotted below) and anodes u are specially protected.



   The anodes d and u are sunk into the earth at will, depending on the circumstances; they can also be located on the surface of the earth, but in this case they must be in sufficient conductive contact with the earth.



   The strength of the current, which passes between anodes d, pipeline b and cable c, will be limited as possible because of the cost savings and therefore the anodes d
 EMI2.3
 Make it as small as possible so that your electrical resistance is greater and only a weak current passes over even when the electrical voltage is too high.



   In order to ensure a balanced, conductive contact between the anodes d and the earth, especially in dry weather, the anodes d can be surrounded with moist clay, earth soaked in salt solution or equivalent materials. They are expediently exchangeable or made of resistant materials (e.g. coal, nickel, platinum, gold)
 EMI2.4
 



  The mode of operation is the same as described above.

 

Claims (1)

PATENT-ANSPRUCH : Einrichtung zum Schütze von in der Erde befindlichen metallischen Gegenständen z. B. Rohr- ie@tungen oder Kabeln gegen Erdströme mit Hilfe eines elektrischen Schutzstromkreises ins- EMI2.5 PATENT CLAIM: Device for protecting metal objects located in the ground, e.g. B. pipes or cables against earth currents with the help of an electrical protective circuit EMI2.5
AT47272D 1909-02-19 1909-02-19 Device for protecting underground metallic objects (e.g. pipes, cables) against earth currents with the help of an electrical protective circuit. AT47272B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT47272T 1909-02-19

Publications (1)

Publication Number Publication Date
AT47272B true AT47272B (en) 1911-04-10

Family

ID=3567613

Family Applications (1)

Application Number Title Priority Date Filing Date
AT47272D AT47272B (en) 1909-02-19 1909-02-19 Device for protecting underground metallic objects (e.g. pipes, cables) against earth currents with the help of an electrical protective circuit.

Country Status (1)

Country Link
AT (1) AT47272B (en)

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