DE492419C - Protective device for electrical machines, transformers or similar electrical devices that are filled with insulating fluid, e.g. B. OEl, are filled - Google Patents
Protective device for electrical machines, transformers or similar electrical devices that are filled with insulating fluid, e.g. B. OEl, are filledInfo
- Publication number
- DE492419C DE492419C DEL66379D DEL0066379D DE492419C DE 492419 C DE492419 C DE 492419C DE L66379 D DEL66379 D DE L66379D DE L0066379 D DEL0066379 D DE L0066379D DE 492419 C DE492419 C DE 492419C
- Authority
- DE
- Germany
- Prior art keywords
- filled
- electrical machines
- transformers
- gas bubbles
- protective device
- 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
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
Landscapes
- Fuses (AREA)
Description
Schutzeinrichtung für elektrische Maschinen, Transformatoren oder ähnliche elektrische Apparate, die mit Isollerflüssigkeit, z. B. 01, gefüllt sind Bekanntlich treten bei allen Schäden in mit Isolierflüssigkeit gefüllten Apparaten örtliche Erwärmungen auf, die in den meisten Fällen Zersetzungsgase zur Folge haben. Es ist auch bekannt, den Auftrieb dieser Gase zur Auslösung von Kontaktvorrichtungen zu benutzen, welche Alarmsignale betätigen oder auch die automatische Abschaltung des gefährdeten Apparates bewirken. Diesen Schutzeinrichtungen haftet aber der Mangel an, daß bewegliche Teile vorhanden sind, die genau ausbalanciert sein müssen und daher eine kostspielige Herstellung erfordern und leicht zu Störungen Anlaß bieten.Protective device for electrical machines, transformers or similar electrical devices that are filled with Isoller fluid, e.g. B. 01, are filled It is known that with all damage in apparatus filled with insulating liquid, local heating occurs, which in most cases results in decomposition gases. It is also known to use the buoyancy of these gases to trigger contact devices which activate alarm signals or also cause the endangered apparatus to be switched off automatically. These protective devices, however, have the defect that there are moving parts which must be precisely balanced and therefore require expensive production and easily give rise to malfunctions.
Gegenstand der vorliegenden Erfindung ist eine Einrichtung, welche den Schutz in sehr einfacher Weise ohne Benutzung von Kontakteinrichtungen bewirkt. Es ist bekannt ', daß die spezifische Belastung von Widerständen oder Drähten durch den elektrischen Strom unter Öl ein Vielfaches derjenigen in Gas oder Luft sein darf.The subject of the present invention is a device which effects protection in a very simple manner without the use of contact devices. It is known that the specific loading of resistors or wires by the electric current under oil may be a multiple of that in gas or air.
Unter Ausnutzung dieser Eigenschaft besteht die Erfindung darin, daß in den Weg der aufsteigenden Gasblasen ein vom Auslösestrom durchflossenes Leiterstück angeordnet ist, dessen physikalische oder chemische Zustandsänderung bei der völligen oder teilweisen Verdrängung der Isolierflüssigkeit durch die Gasblasen die Auslösung bewirkt.Taking advantage of this property, the invention consists in that in the path of the rising gas bubbles a piece of conductor through which the tripping current flows is arranged, its physical or chemical change of state in the complete or partial displacement of the insulating liquid by the gas bubbles triggering causes.
Eine Ausführungsform besteht beispi#elsweise bei Transformatoren darin, daß in der Zuleitung zum Ölschützer oder sonst an geeigneter Stelle ein Gefäß angebracht ist, welches mit dem Ölraum in Verbindung stehend geeignet ist, einen Sammelraum für die aufsteigenden Gase zu bilden.One embodiment for transformers is, for example, that a vessel is attached in the supply line to the oil protector or otherwise at a suitable point which is suitable in communication with the oil space, a collecting space for the ascending gases to form.
Wird in diesem Raum ein Schmelzdraht angeordnet, der derartig mit Strom belastet ist, daß er in 01 diese Belastung ohne weiteres aushält, so wird er in dem Augenblick, wo das ihn umgebende Ül durch Gas verdrängt wird, z. B. beim Vorbeistreichen einer Gasblase, sofort zum Abschmelzen kommen. Die hierdurch eingetretene Stromunterbrechung kann in an sich bekannter Weise zur Betätigung optischer oder akustischer Signaleinrichtungen oder zum Abschalten des gefährdeten Apparates dienen.If a fuse wire is placed in this space which is so charged with current that it can withstand this load in 01 without further ado, it will be displaced at the moment when the oil surrounding it is displaced by gas, e.g. B. when passing a gas bubble, come to melt immediately. The current interruption that occurs as a result can be used in a manner known per se to actuate optical or acoustic signaling devices or to switch off the endangered apparatus.
Unter Umständen genügt auch schon die Widerstandsveränderung eines geei 'gneten stromdurchflossenen Leiters, welche durch die Verschiedenheit der Abkühlungsv-erhältnisse unter öl oder Gas gegeben ist, zur Betätigung einer Signaleinrichtung.Under certain circumstances, the change in resistance of a suitable current-carrying conductor, which is given by the difference in the cooling conditions under oil or gas, is sufficient to actuate a signaling device.
Der- stromdurchflossene Leiter kann aus Metall oder Kohle oder sonstigen kristallinischen oder nicht kristallinischen Körpern bestehen.The current-carrying conductor can be made of metal or carbon or other crystalline or non-crystalline bodies exist.
Weiter lassen sich auch unter Verwendung von in dem 01 angeordneten Thermostaten Anordnungen treffen, die auf die Signal- oder Auslöseapparate einwirken.Furthermore, with the use of thermostats arranged in the 01 , arrangements can be made which act on the signaling or triggering apparatus.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL66379D DE492419C (en) | 1926-03-18 | 1926-03-18 | Protective device for electrical machines, transformers or similar electrical devices that are filled with insulating fluid, e.g. B. OEl, are filled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL66379D DE492419C (en) | 1926-03-18 | 1926-03-18 | Protective device for electrical machines, transformers or similar electrical devices that are filled with insulating fluid, e.g. B. OEl, are filled |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE492419C true DE492419C (en) | 1930-02-24 |
Family
ID=7281572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL66379D Expired DE492419C (en) | 1926-03-18 | 1926-03-18 | Protective device for electrical machines, transformers or similar electrical devices that are filled with insulating fluid, e.g. B. OEl, are filled |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE492419C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE744707C (en) * | 1939-07-26 | 1944-06-08 | Siemens Ag | Monitoring device for electrical machines and apparatus, which responds to the gaseous or liquid decomposition products of electrical apparatus insulated with halogenated hydrocarbons that are released by arcing |
-
1926
- 1926-03-18 DE DEL66379D patent/DE492419C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE744707C (en) * | 1939-07-26 | 1944-06-08 | Siemens Ag | Monitoring device for electrical machines and apparatus, which responds to the gaseous or liquid decomposition products of electrical apparatus insulated with halogenated hydrocarbons that are released by arcing |
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