DE612597C - Electrical switch, the contacts of which are blown with compressed gas - Google Patents
Electrical switch, the contacts of which are blown with compressed gasInfo
- Publication number
- DE612597C DE612597C DEA57886D DEA0057886D DE612597C DE 612597 C DE612597 C DE 612597C DE A57886 D DEA57886 D DE A57886D DE A0057886 D DEA0057886 D DE A0057886D DE 612597 C DE612597 C DE 612597C
- Authority
- DE
- Germany
- Prior art keywords
- contacts
- compressed gas
- blown
- electrical switch
- switch
- 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
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000001934 delay Effects 0.000 description 2
- 229940064582 akten Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- YECIFGHRMFEPJK-UHFFFAOYSA-N lidocaine hydrochloride monohydrate Chemical compound O.[Cl-].CC[NH+](CC)CC(=O)NC1=C(C)C=CC=C1C YECIFGHRMFEPJK-UHFFFAOYSA-N 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
Elektrischer Schalter, dessen Kontakte mit Druckgas beblasen werden Das Hauptpatent betrifft eine Einrichtung bei Schaltern mit Lichtbogenlöschung durch Druckgas, durch die der Anstieg der Spannung nach dem Abreißen des Lichtbogens verzögert wird. Zu diesem Zweck ist die Verwendung eines Kondensators vorgeschlagen, der zu den Schalterkontakten parallel geschaltet wird. Sind in der Schaltanlage Drosselspulen zur Begrenzung des Kurzschlußstromes vorbanden, so ergeben sich besondere Schwierigkeiten, die in der Hauptsache dadurch hervorgerufen werden, daß im Falle eines Kurzschlusses ein großer Teil der Spannung von der Drosselspule aufgenommen wird und beim Abreißen des Lichtbogens dieser Spannungsabfall plötzlich verschwindet und einen plötzlichen Spannungsanstieg hervorruft, selbst wenn sich die Reaktanz hinter dem Druckgasschalter befindet.Electrical switch, the contacts of which are blown with compressed gas The main patent relates to a device in switches with arcing Compressed gas, which delays the rise in voltage after the arc has broken will. For this purpose, the use of a capacitor is proposed, which is too connected in parallel to the switch contacts. There are reactors in the switchgear to limit the short-circuit current, then particular difficulties arise, which are mainly caused by the fact that in the event of a short circuit Much of the voltage is absorbed by the choke coil and when it rips off of the arc this voltage drop suddenly disappears and a sudden one Voltage rise causes even if the reactance is behind the gas pressure switch is located.
Dieser Nachteil wird erfindungsgemäß dadurch vermieden, daß man die Kondensatoren parallel zu den Reaktanzen schaltet, welche von dem durch den Schalter zu unterbrechenden Strom durchflossen werden. Es bat sich nämlich gezeigt, daß die nach dem Abschalten des Kurzschlusses wiederkehrende Spannung fast ausschließlich durch die Eigenschwingungszahl der Stromabgrenzungsdrosselspule bestimmt wird. Infolgedessen setzt ein zu der Drosselspule parallel geschalteter Kondensator deren Eigenschwingungszahl herab und verzögert auf diese Weise den Anstieg der wiederkehrenden Spannung.According to the invention, this disadvantage is avoided by the Capacitors are switched in parallel with the reactances, whichever one is switched by the switch current to be interrupted. It was shown that the after the short circuit has been switched off, almost all of the voltage returns is determined by the natural frequency of the current limiting reactor. Consequently a capacitor connected in parallel to the choke coil sets its natural frequency and in this way delays the rise in the repetitive voltage.
Um die erstrebte Wirkung mit Sicherheit zu erzielen, muß der Kondensator den in dem Patent 610 404 aufgestellten Bedingungen genügen, cl.. h. seine Kapazität muß so bemessen sein, daß die Eigenschwingungszahl des betreffenden Kreises unterhalb i 5 ooo Hertz liegt.In order to achieve the desired effect with certainty, the capacitor satisfy the conditions set out in patent 610,404, cl .. h. its capacity must be dimensioned so that the natural frequency of the circle in question is below i 5,000 hertz.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Hierin bedeutet a einen Drehstromgenerator, b eiaa Sammelschienensystem, von welchem über die Druckgasschalter c mehrere Leitungen d, e und f abgehen. Die Leitungen d und e mögen keinerlei Einrichtungen zur Begrenzung des Kurzschlußstromes haben, während in der Leitung/ hinter dem Schalter c eine Stromabgrenzungsdro.sselspule Beingebaut ist. Zum Schutz der Schalter in. den beiden Leitungen d und e, welche keine Reaktanzen besitzen, ist ein Kondensator h direkt an die Sammelschienen b angeschlossen. Zum Schutz des Druckgasschalters in der Leitung/ ist ferner erfindungsgemäß sein Kondensator i parallel zu der Drosselspule g geschaltet, der die Frequenz der beim Abschalten entstehenden, Schwingungen so weit herabsetzt, daß keine Rückzündung an den 'Schalfierkont_akten auftreten kann.An exemplary embodiment of the invention is shown in the drawing. Here, a denotes a three-phase generator, b eiaa a busbar system, from which several lines d, e and f branch off via the compressed gas switch c. The lines d and e may not have any devices for limiting the short-circuit current, while a current delimitation coil is built into the line / behind the switch c. To protect the switches in the two lines d and e, which have no reactances, a capacitor h is connected directly to the busbars b. To protect the gas pressure switch in the line / according to the invention, its capacitor i is connected in parallel to the choke coil g, which lowers the frequency of the oscillations produced when switching off so that no flashback can occur on the 'Schalfierkont_akten'.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA57886D DE612597C (en) | 1928-09-08 | Electrical switch, the contacts of which are blown with compressed gas |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA57886D DE612597C (en) | 1928-09-08 | Electrical switch, the contacts of which are blown with compressed gas | |
| DE681210X | 1928-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE612597C true DE612597C (en) | 1935-04-29 |
Family
ID=25946150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEA57886D Expired DE612597C (en) | 1928-09-08 | Electrical switch, the contacts of which are blown with compressed gas |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE612597C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE744554C (en) * | 1941-04-04 | 1944-01-20 | Otto Kreutzer | Switching arrangement for preventing switching sparks in AC circuits |
-
0
- DE DEA57886D patent/DE612597C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE744554C (en) * | 1941-04-04 | 1944-01-20 | Otto Kreutzer | Switching arrangement for preventing switching sparks in AC circuits |
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