US2653204A - Equalizing device for air current in air blast circuit breakers - Google Patents
Equalizing device for air current in air blast circuit breakers Download PDFInfo
- Publication number
- US2653204A US2653204A US139062A US13906250A US2653204A US 2653204 A US2653204 A US 2653204A US 139062 A US139062 A US 139062A US 13906250 A US13906250 A US 13906250A US 2653204 A US2653204 A US 2653204A
- Authority
- US
- United States
- Prior art keywords
- air
- blast circuit
- circuit breakers
- equalizing device
- air current
- 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 - Lifetime
Links
Images
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
- H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
- H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
- H01H33/703—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
-
- 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
- H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
Definitions
- the present invention has for its object an arrangement in air blast circuit breakers by which an improved extinguishing action is attained.
- air blast circuit breakers the compressed an is delivered to the arc, occurring when the c1rcuit breaker is opened, by pipe lines or channels, and in the air currents there are formed whirls which, when they come into the space between the opened contacts of the circuit breaker, decrease the dielectric strength of the air.
- this disadvantageous action of the whirl formation is avoided thereby that the extinguishing air current immediately before it comes into contact with the arc is brought to pass a plurality of guide vanes or other members which divide the air current into a plurality of parallel currents, by which step the whirl formation in the air current is suppressed or entirely avoided.
- These guide vanes may either be of insulating material or of metal, and in the latter case they may be conductively interconnected and connected with one of the contacts. Instead of delivering the air across the said guide vanes, a plurality of narrow channels may be arranged, through which the air is delivered to the are.
- i designates the stationary contact of the circuit breaker and 2 its movable contact, which latter, when moving downwards, is intended to be drawn into a space limited by a cylinder 3.
- the space below the stationary contact is surrounded by a cylinder 4, and the compressed air for the extinction is delivered to the arc in the space between the two contacts I and 2.
- a number of bafiies are arranged, which are provided with openings for the passage of the movable contact.
- baflles are in a suitable manner arranged at a small distance from each other, and carried by an insulating cylinder 6 attached to the cylinder 3.
- bafiles 5 may either be made of metal as shown or of some insulating material. In the case that they are made of metal, they may either be insulated from each other or be conductively interconnected, and in the latter case they may also be connected with one of the contacts as by the connections I. histead of making the baflies entirely flat, as shown on the drawing, they may also be cupformed. Their chief feature is that they are able to perform a division of the air current into a plurality of currents and do not form any obstacle to it. Instead of dividing the compressed air current by means of baflies, the division can also be performed by means of a number of short pipes or channels directed against the arc.
- An air blast circuit breaker comprising fixed and movable contacts, a casing surrounding one of said contacts and enclosing an annular passage for the supply of extinguishing air to the arc gap between the contacts, and a plurality of air separating members arranged in the form of an annulus and in closely spaced relation to each other to counteract whirling motions in the extinguishing air before such air passes from said annular passage to the arc gap.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Massaging Devices (AREA)
- Circuit Breakers (AREA)
Description
Sept. 22, 1953 FORWALD 2,653,204
H. EQUALIZING DEVICE FOR AIR CURRENT IN AIR BLAST CIRCUIT BREAKERS Filed Jan. 17, 1950 //7 yen for fleeKo/v TORWAAD Patented Sept. 22, 1953 EQUALIZIN G DEVICE FOR AIR CURRENT 1N AIR BLAST CIRCUIT BREAKERS Haakon Forwald, Valhalla, Sweden, assignor to Allmanna Svenska Elektriska Aktiebolaget, Vasteras, Sweden, a Swedish corporation Application January 17, 1950, Serial N 0. 139,062 In Sweden January 27, 1949 3 Claims. (Cl. 200-148) The present invention has for its object an arrangement in air blast circuit breakers by which an improved extinguishing action is attained. In air blast circuit breakers the compressed an is delivered to the arc, occurring when the c1rcuit breaker is opened, by pipe lines or channels, and in the air currents there are formed whirls which, when they come into the space between the opened contacts of the circuit breaker, decrease the dielectric strength of the air. According to the present invention, this disadvantageous action of the whirl formation is avoided thereby that the extinguishing air current immediately before it comes into contact with the arc is brought to pass a plurality of guide vanes or other members which divide the air current into a plurality of parallel currents, by which step the whirl formation in the air current is suppressed or entirely avoided. These guide vanes may either be of insulating material or of metal, and in the latter case they may be conductively interconnected and connected with one of the contacts. Instead of delivering the air across the said guide vanes, a plurality of narrow channels may be arranged, through which the air is delivered to the are. On the accompanying drawing, one form of the invention is shown, where i designates the stationary contact of the circuit breaker and 2 its movable contact, which latter, when moving downwards, is intended to be drawn into a space limited by a cylinder 3. The space below the stationary contact is surrounded by a cylinder 4, and the compressed air for the extinction is delivered to the arc in the space between the two contacts I and 2. Around the arc gap and in the immediate neighbourhood of it, a number of bafiies are arranged, which are provided with openings for the passage of the movable contact. These baflles are in a suitable manner arranged at a small distance from each other, and carried by an insulating cylinder 6 attached to the cylinder 3. The air streaming upwards between the cylinders 3 and 4 is by these bafiles 5 divided into a plurality of parallel currents directed against the arc. The bafiles 5may either be made of metal as shown or of some insulating material. In the case that they are made of metal, they may either be insulated from each other or be conductively interconnected, and in the latter case they may also be connected with one of the contacts as by the connections I. histead of making the baflies entirely flat, as shown on the drawing, they may also be cupformed. Their chief feature is that they are able to perform a division of the air current into a plurality of currents and do not form any obstacle to it. Instead of dividing the compressed air current by means of baflies, the division can also be performed by means of a number of short pipes or channels directed against the arc.
I claim as my invention:
1. An air blast circuit breaker comprising fixed and movable contacts, a casing surrounding one of said contacts and enclosing an annular passage for the supply of extinguishing air to the arc gap between the contacts, and a plurality of air separating members arranged in the form of an annulus and in closely spaced relation to each other to counteract whirling motions in the extinguishing air before such air passes from said annular passage to the arc gap.
2. An air blast circuit breaker according to claim 1, in which said members consist of a series of closely spaced annular baffles.
3. An air blast circuit breaker according to claim 1, in which said members consist of a series of closely spaced annular baffles of metal electrically connected with each other and with one of said contacts.
HAAKON FORWALD.
References Cited in the file of this patent UNITED STATES PATENTS Name Date Trencharn Mar. 10, 1942 Bennett Aug. 14, 1945 FOREIGN PATENTS Number Number
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE279750X | 1949-01-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2653204A true US2653204A (en) | 1953-09-22 |
Family
ID=20306978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US139062A Expired - Lifetime US2653204A (en) | 1949-01-27 | 1950-01-17 | Equalizing device for air current in air blast circuit breakers |
Country Status (4)
Country | Link |
---|---|
US (1) | US2653204A (en) |
CH (1) | CH279750A (en) |
DE (2) | DE908878C (en) |
FR (1) | FR1009463A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2813177A (en) * | 1954-03-29 | 1957-11-12 | Kelman Electric And Mfg Compan | Circuit breaker |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1069738B (en) * | 1956-01-17 | 1959-11-26 | ||
FR2623657A1 (en) * | 1987-11-19 | 1989-05-26 | Merlin Gerin | Circuit-breaker with self-blasting by expansion of insulating gas, equipped with an electric field distribution screen |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB369189A (en) * | 1929-09-11 | 1932-03-17 | British Thomson Houston Co Ltd | Improvements in and relating to circuit breakers |
GB478122A (en) * | 1935-06-14 | 1938-01-10 | Siemens Ag | Improvements in and relating to arc quenching devices |
GB516529A (en) * | 1938-06-22 | 1940-01-04 | Reyrolle A & Co Ltd | Improvements in or relating to electric circuit-breaking devices of the gas-blast type |
US2275872A (en) * | 1939-06-27 | 1942-03-10 | Gen Electric | Gas blast electric circuit breaker |
US2382850A (en) * | 1942-06-16 | 1945-08-14 | Gen Electric | Gas blast electric circuit breaker |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE602039C (en) * | 1927-10-30 | 1934-09-04 | Siemens Schuckertwerke Akt Ges | counter |
DE600406C (en) * | 1932-10-13 | 1934-07-21 | Bbc Brown Boveri & Cie | High voltage alternating current switch |
DE603883C (en) * | 1933-03-23 | 1934-10-10 | Bbc Brown Boveri & Cie | Switching arrangement |
DE687900C (en) * | 1934-07-18 | 1940-02-08 | Frida Strauss Geb Ruppel | Switch with arc extinguishing by compressed gas |
BE412834A (en) * | 1934-12-18 |
-
1950
- 1950-01-17 US US139062A patent/US2653204A/en not_active Expired - Lifetime
- 1950-01-17 CH CH279750D patent/CH279750A/en unknown
- 1950-01-27 DE DEA14699A patent/DE908878C/en not_active Expired
- 1950-01-27 FR FR1009463D patent/FR1009463A/en not_active Expired
-
1951
- 1951-12-13 DE DEA14700A patent/DE865758C/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB369189A (en) * | 1929-09-11 | 1932-03-17 | British Thomson Houston Co Ltd | Improvements in and relating to circuit breakers |
GB478122A (en) * | 1935-06-14 | 1938-01-10 | Siemens Ag | Improvements in and relating to arc quenching devices |
GB516529A (en) * | 1938-06-22 | 1940-01-04 | Reyrolle A & Co Ltd | Improvements in or relating to electric circuit-breaking devices of the gas-blast type |
US2275872A (en) * | 1939-06-27 | 1942-03-10 | Gen Electric | Gas blast electric circuit breaker |
US2382850A (en) * | 1942-06-16 | 1945-08-14 | Gen Electric | Gas blast electric circuit breaker |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2813177A (en) * | 1954-03-29 | 1957-11-12 | Kelman Electric And Mfg Compan | Circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
DE908878C (en) | 1954-04-12 |
DE865758C (en) | 1953-02-05 |
CH279750A (en) | 1951-12-15 |
FR1009463A (en) | 1952-05-29 |
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