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
Links
- 230000001681 protective effect Effects 0.000 title claims 2
- 239000002184 metal Substances 0.000 claims 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
Landscapes
- Prevention Of Electric Corrosion (AREA)
Description
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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.
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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.
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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
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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.
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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.
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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
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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)
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The mode of operation is the same as described above.
Claims (1)
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) |
-
1909
- 1909-02-19 AT AT47272D patent/AT47272B/en active
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