DE2324125A1 - ELECTRIC BREAKERS IN SWITCH CHAMBERS, IN PARTICULAR SF TIEF 6-PRESSURE GAS SWITCHES, COMPONENTS ARRANGED FROM MATERIAL EMITING GAS UNDER THE EFFECT OF ARC HEAT - Google Patents
ELECTRIC BREAKERS IN SWITCH CHAMBERS, IN PARTICULAR SF TIEF 6-PRESSURE GAS SWITCHES, COMPONENTS ARRANGED FROM MATERIAL EMITING GAS UNDER THE EFFECT OF ARC HEATInfo
- Publication number
- DE2324125A1 DE2324125A1 DE19732324125 DE2324125A DE2324125A1 DE 2324125 A1 DE2324125 A1 DE 2324125A1 DE 19732324125 DE19732324125 DE 19732324125 DE 2324125 A DE2324125 A DE 2324125A DE 2324125 A1 DE2324125 A1 DE 2324125A1
- Authority
- DE
- Germany
- Prior art keywords
- effect
- tief
- emiting
- pressure gas
- arc heat
- 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.)
- Granted
Links
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
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
Description
45/7345/73
Aktiengesellschaft Brown, Boveri & Cie., Baden (Schweiz)Public limited company Brown, Boveri & Cie., Baden (Switzerland)
In Schaltkammern elektrischer Unterbrecher, insbesondere SF^-Druckgasschalter, angeordnete Bauteile aus unter der Einwirkung der Lichtbogenwärme gasabgebendem Werkstoff In switching chambers of electrical breakers, in particular SF ^ pressure gas switches, components made of material that emits gas under the action of the heat of the arc
Die Erfindung bezieht sich auf in Schaltkammern elektrischer Unterbrecher, insbesondere SF^-Druckgasschalter, angeordnete Bauteile aus unter der Einwirkung der Lichtbogenwärme gasabgebendem Werkstoff, insbesondere Polytetrafluoräthylen.The invention relates to electrical breakers, in particular SF ^ compressed gas switches, arranged in switching chambers Components made of material that emits gas under the action of the heat of the arc, in particular polytetrafluoroethylene.
Es gehört zum Stand der Technik, bei Gasschaltern, insbesondere auch bei solchen mit SP,- als Löschmittel, für Bauteile in Schaltkammern fluorhaltige Aethylene zu verwenden,, welche gasabgebend sind (vgl. z.B. DT-PS 871» 929 s DT-Gbm 1 803 973). Bevorzugt wird hierfür Polytetrafluoräthylen (Handelsname: Teflon) mit und ohne Füllstoff.It is part of the state of the art to use fluorine-containing ethylene as an extinguishing agent for gas switches, especially those with SP, for components in switching chambers, which are gas-emitting (cf. e.g. DT-PS 87 1 »929 s DT-Gbm 1 803 973). Polytetrafluoroethylene (trade name: Teflon) with and without filler is preferred for this purpose.
409846/0637409846/0637
Es hat sich jedoch gezeigt, dass bei Einwirkung von Lichtbögen hoher Stromstärke auf derartige Bauteile Beschädigungen an deren Oberfläche auftreten, die sich -als Abplatzen von Oberflächenstückchen von der Grosse einiger mnr äussern. Die Ursache hierfür liegt darin, dass sich im Werkstoffinneren durch die thermische Einwirkung des Lichtbogens infolge einer Werkstoffzersetzung kleine lunkerartige Räume bilden, die sich mit Gasen bzw. Dämpfen hohen Druckes anfüllen und schliesslich das Abplatzen der kleinen Oberflächenstücke bewirken. However, it has been shown that when such components are exposed to high-current arcs, damage is caused occur on the surface, which manifest themselves as flaking of surface pieces of the size of a few mn. The reason for this lies in the fact that the thermal effects of the electric arc cause the material inside form small cavity-like spaces when the material decomposes, which fill with gases or vapors of high pressure and finally cause the small pieces of surface to flake off.
Da derartige Erscheinungen zu einem starken Materialabtrag bzw. zu einer Verschlechterung der Oberflächenqualit.ät führen, z.B. bei durchströmten Düsenkörpern, wurde zur Abhilfe bereits vorgeschlagen, für den Gasaustritt aus dem Inneren an den Bauteilen Oeffnungen, z.B. in Form von Sacklöchern oder Nuten anzubringen. Um die erwünschte Wirkung zu erzielen, bedarf es aber einer Vielzahl feiner Oeffnungen, deren Herstellung noch verhältnismässig kostspielig ist.Since such phenomena lead to heavy material removal or to a deterioration in the surface quality, E.g. in the case of flow-through nozzle bodies, a remedy has already been proposed for the gas to escape from the interior of the components Make openings, e.g. in the form of blind holes or grooves. In order to achieve the desired effect, it is necessary but a large number of fine openings, the production of which is still relatively expensive.
Mit der Erfindung wird das gleiche Ziel auf einem anderen Weg erreicht, bei dem sich die mechanische Herstellung der Aur_- trittsoeffnungen vermeiden lSsst, wodurch sich eine erhebliche Verbilligung ergibt. Erfindungsgemäss wird vorgeschlagen, dassWith the invention, the same goal is achieved in a different way, in which the mechanical production of the Aur_- Step openings can be avoided, which results in a considerable Cheaper results. According to the invention it is proposed that
409846/0637409846/0637
45/7345/73
der Werkstoff für die Bauteile zwecks Abführung der im Inneren unter der Wärmeeinwirkung des Lichtbogens gebildeten Gase eine Porosität in der Art einer Filterstruktur besitzt. Die Figur zeigt ein Ausführungsbeispiel der Erfindung anhand einer Schaltstückanordnung eines Gasschalters, bei welcher die Lichtbogenlöschzone von einer Isolierdüse umgeben ist. Es ist die Stellung gezeigt, in welcher sich zwischen den getrennten Schaltstücken 2,3 beim Ausschaltvorgang der Lichtbogen 4 gebildet hat. Die Löschzone zwischen den Schaltstücken· 3,2 ist wenigstens zum Teil von einer Isolierdüse 1 umgeben, welche in an sich bekannter Weise zur Lenkung einer Löschmittel strömung dient. Die Isolierdüse 1 ist besonders an ihrer engsten Stelle bei grossen abzuschaltenden Lichtbogenströmen thermisch hoch beansprucht. Sie besteht aus einem Werkstoff, der zwecks Abführung infolge der Hitzestrahlung der in seinem Inneren dabei entstehenden Gase eine Porosität in der Art einer Filterstruktur besitzt. Auf diese Weise gelangen die Gase ungehindert an die Oberfläche und in die Umgebung, ohne dass die Oberfläche eine Beschädigung erleidet. Der Vorteil liegt in der Erhöhung der Strom-Zeit-Belastbarkeit ohne Einbusse an Oberflächenqualität.the material for the components for the purpose of dissipating what is formed inside under the effect of the heat of the electric arc Gases has a porosity in the manner of a filter structure. The figure shows an embodiment of the invention based on a switching piece arrangement of a gas switch, in which the arc extinguishing zone is surrounded by an insulating nozzle. The position shown is in which the arc occurs between the separate contact pieces 2, 3 during the switching-off process 4 has formed. The quenching zone between the contact pieces 3.2 is at least partially surrounded by an insulating nozzle 1 which, in a manner known per se, is used to direct an extinguishing agent flow serves. The insulating nozzle 1 is particularly at its narrowest point in the case of large arcing currents to be switched off thermally highly stressed. It consists of a material that is used for the purpose of dissipation as a result of the heat radiation the inside of the resulting gases has a porosity in the manner of a filter structure. Get this way the gases unhindered to the surface and into the environment without the surface being damaged. The advantage lies in the increase in the current-time load capacity without any loss of surface quality.
Besonders zweckmässig hat sich als Werkstoff für derartige Teile mit hoher thermischer Beanspruchung ein handelsüblichesA commercially available material has proven particularly useful as a material for such parts with high thermal stress
409846/0637409846/0637
-Jj- 45/73-Yy- 45/73
Pilter-Polytetrafluoräthylen (PTFE) mit einer Porenweite bis zu 50 Xim und einer Korngrösse bis zu 200/um erwiesen (lyum = 0,001 mm). Ein derartiger Werkstoff hat in seinem Inneren eine durchgehende Filterstruktur, die etwa mit einer Tropfsteinhöhle im kleinen vergleichbar ist, das heisst Porenform und feste Teile bilden ein unregelmässiges System. Die mittlere Porenweite ist im wesentlichen der mittleren Korngrösse, d.h. der Grosse "der bei der Herstellung als Ausgangsmaterial verwendeten Polytetrafluoräthylen-Körnchen proportional. Diese Kenngrössen sind u.a. für die Verwendungsart in Nass- und Gasfiltern relevant.Pilter polytetrafluoroethylene (PTFE) with a pore size up to 50 xim and a grain size up to 200 / µm (lyum = 0.001 mm). Such a material has in his Inside a continuous filter structure that is comparable to a stalactite cave on a small scale, that is The pore shape and solid parts form an irregular system. The mean pore size is essentially the mean Grain size, i.e. the "size" used in production as the starting material used polytetrafluoroethylene granules proportionally. These parameters are, among other things, for the type of use relevant in wet and gas filters.
409846/0637409846/0637
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH574273A CH557589A (en) | 1973-04-24 | 1973-04-24 | IN A SWITCHING CHAMBER OF AN ELECTRIC GAS SWITCH, IN PARTICULAR A SF6 COMPRESSED GAS SWITCH, A COMPONENT MADE OF A MATERIAL EMITING GAS UNDER THE EFFECT OF ARC HEAT. |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2324125A1 true DE2324125A1 (en) | 1974-11-14 |
DE2324125C2 DE2324125C2 (en) | 1981-12-24 |
Family
ID=4298597
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19737317953 Expired DE7317953U (en) | 1973-04-24 | 1973-05-12 | Insulating nozzle body for use in switching chambers of electrical breakers |
DE19732324125 Expired DE2324125C2 (en) | 1973-04-24 | 1973-05-12 | Components arranged in switching chambers of electrical circuit breakers, in particular SF 6 compressed gas switches, made of material that emits gas under the action of the heat of the arc |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19737317953 Expired DE7317953U (en) | 1973-04-24 | 1973-05-12 | Insulating nozzle body for use in switching chambers of electrical breakers |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS50111578A (en) |
CH (1) | CH557589A (en) |
DE (2) | DE7317953U (en) |
FR (1) | FR2227618A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3247681A1 (en) * | 1982-12-23 | 1984-06-28 | Brown, Boveri & Cie Ag, 6800 Mannheim | Arc-extinguishing chamber |
DE19517540A1 (en) * | 1995-05-12 | 1996-11-14 | Abb Research Ltd | Extinguishing gas releasing material and pressure gas switch with such a material |
DE19622753C1 (en) * | 1996-06-07 | 1997-08-28 | Daimler Benz Ag | Cross gas blast switch nozzle for electrical high tension switch |
DE19614104A1 (en) * | 1996-04-10 | 1997-10-16 | Aeg Energietechnik Gmbh | Pressure gas switch |
US5717183A (en) * | 1993-09-24 | 1998-02-10 | Siemens Aktiengesellschaft | High-voltage power switch with a cooling device for cooling the quenching gas |
DE19645524A1 (en) * | 1996-11-05 | 1998-05-07 | Abb Research Ltd | Circuit breaker |
DE102015213604A1 (en) * | 2015-07-20 | 2017-01-26 | Siemens Aktiengesellschaft | Gas-insulated switchgear |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT208624Z2 (en) * | 1986-12-11 | 1988-05-28 | Sace Spa | ARC CHAMBER, IN PARTICULAR FOR LOW VOLTAGE SWITCHES.! |
DE3642509A1 (en) * | 1986-12-12 | 1988-06-23 | Licentia Gmbh | Nozzle for high-voltage switches |
DE19645525A1 (en) * | 1996-11-05 | 1998-05-07 | Abb Research Ltd | Circuit breaker |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE874929C (en) * | 1951-08-03 | 1953-04-27 | Licentia Gmbh | Electrical circuit breaker, in particular a gas switch, with an extinguishing chamber that emits extinguishing gas under the influence of the arc heat |
DE1803973U (en) * | 1959-04-23 | 1960-01-14 | Siemens Ag | ELECTRIC SWITCH. |
-
1973
- 1973-04-24 CH CH574273A patent/CH557589A/en not_active IP Right Cessation
- 1973-05-12 DE DE19737317953 patent/DE7317953U/en not_active Expired
- 1973-05-12 DE DE19732324125 patent/DE2324125C2/en not_active Expired
-
1974
- 1974-04-09 JP JP4038074A patent/JPS50111578A/ja active Pending
- 1974-04-22 FR FR7413879A patent/FR2227618A1/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE874929C (en) * | 1951-08-03 | 1953-04-27 | Licentia Gmbh | Electrical circuit breaker, in particular a gas switch, with an extinguishing chamber that emits extinguishing gas under the influence of the arc heat |
DE1803973U (en) * | 1959-04-23 | 1960-01-14 | Siemens Ag | ELECTRIC SWITCH. |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3247681A1 (en) * | 1982-12-23 | 1984-06-28 | Brown, Boveri & Cie Ag, 6800 Mannheim | Arc-extinguishing chamber |
US5717183A (en) * | 1993-09-24 | 1998-02-10 | Siemens Aktiengesellschaft | High-voltage power switch with a cooling device for cooling the quenching gas |
DE19517540A1 (en) * | 1995-05-12 | 1996-11-14 | Abb Research Ltd | Extinguishing gas releasing material and pressure gas switch with such a material |
US5828026A (en) * | 1995-05-12 | 1998-10-27 | Abb Research Ltd. | Stock giving off arc-extinguishing gas, and gas-blast circuit breaker comprising such a stock |
DE19614104A1 (en) * | 1996-04-10 | 1997-10-16 | Aeg Energietechnik Gmbh | Pressure gas switch |
DE19614104C2 (en) * | 1996-04-10 | 1998-05-14 | Aeg Energietechnik Gmbh | Gas pressure switch |
DE19622753C1 (en) * | 1996-06-07 | 1997-08-28 | Daimler Benz Ag | Cross gas blast switch nozzle for electrical high tension switch |
DE19645524A1 (en) * | 1996-11-05 | 1998-05-07 | Abb Research Ltd | Circuit breaker |
US5925863A (en) * | 1996-11-05 | 1999-07-20 | Abb Research Ltd. | Power breaker |
DE102015213604A1 (en) * | 2015-07-20 | 2017-01-26 | Siemens Aktiengesellschaft | Gas-insulated switchgear |
Also Published As
Publication number | Publication date |
---|---|
DE2324125C2 (en) | 1981-12-24 |
FR2227618B1 (en) | 1978-01-27 |
JPS50111578A (en) | 1975-09-02 |
FR2227618A1 (en) | 1974-11-22 |
DE7317953U (en) | 1975-03-27 |
CH557589A (en) | 1974-12-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OD | Request for examination | ||
D2 | Grant after examination | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: BBC BROWN BOVERI AG, BADEN, AARGAU, CH |
|
8328 | Change in the person/name/address of the agent |
Free format text: DERZEIT KEIN VERTRETER BESTELLT |
|
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |