US2293513A - Electric air circuit breaker - Google Patents
Electric air circuit breaker Download PDFInfo
- Publication number
- US2293513A US2293513A US298946A US29894639A US2293513A US 2293513 A US2293513 A US 2293513A US 298946 A US298946 A US 298946A US 29894639 A US29894639 A US 29894639A US 2293513 A US2293513 A US 2293513A
- Authority
- US
- United States
- Prior art keywords
- arc
- chute
- circuit breaker
- air circuit
- fins
- 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
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/02—Means for extinguishing arc
- H01T1/04—Means for extinguishing arc using magnetic blow-out
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/06—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances asbestos
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/342—Venting arrangements for arc chutes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
Definitions
- My invention relates to electric air circuit breakers, more particularly to air circuit breakers of the magnetic blowout type wherein a high current power arc is forced or directed into arc extinguishing structure, and has for its principal object the provision of an improved air circuit breaker that is capable of quickly interrupting a high voltage power circuit that may be characterized by a high rate of increase of the recovery voltage with minimum system disturbance and without re-establishing of arcing.
- a further object is the provision of an improved air circuit breaker that has high current interrupting capacity and that is etficient, positive and consistent in operation.
- Fig. 1 is an elevational view, partly in section of an air circuit breaker embodying the present invention adapted for a well-known form of metal clad switchgear;
- Fig. 2 is an enlarged view, partly in section, of the arc extinguishing structure shown in Fig. 1;
- Fig. 3 is an end view of the arc extinguishing structure shown in Fig. 2;
- Fig. 4 is another end view of the arc extinguishing structure taken along the line 44 of Fig. 2;
- Fig. 5 is an exploded view showing details of the arc extinguishing structure of Figs. 2 and 3;
- Fig. 6 is a view taken along the line 6-6 of Fig. 2, and
- Fig. 7 is a top view, partly broken away, of the main housing for the arc extinguishing structure.
- the air circuit breaker illustrated by Fig. 1 is in a form that is particularly adaptable for central stations and sub-stations wherein the circuit breaker unit can be bodily disconnected with respect to the stationary circuits by a simple plugging operation. That is, in the present instance the circuit breaker is of the well-known dropdown type wherein disconnection is effected merely by bodily lowering of the circuit breaker. More specifically, the arrangement comprises a main supporting frame I for the movable contact structure which comprises a fixed contact 2 and a relatively movable contact 3 that is pivotally mounted at 4 on one of the circuit breaker studs and is operated by means of a reciprocally movable rod 5.
- the operating rod 5 is suitably con- .nected to an actuating mechanism 6 carried by the frame I that may be, as indicated, of the sclenoid type.
- the contacts 2 and 3 are electrically connected to the lower ends of the conductor studs 1 and 8 respectively which also serve as plug type disconnecting contacts for the breaker unit. Accordingly, when the contacts 2 and 3 are connected in a power circuit and are separated, an arc may form across the gap indicated.
- an arc extinguishing structure generally indicated at 9 is mounted in the frame I so as directly to receive the power are which is under the influence of the magnetic fields produced by the blowout coils l0 and H.
- the arc extinguishing structure is similar to a conventional arc chute wherein the arc is formed at a narrow entrance part of the chute and is rapidly extended in the form of a loop through the chute.
- the arc extinguishing structure comprises spaced side Walls l2 and I3 composed of arc resisting material, such as asbestos board, each side wall having on the side facing the other wall a plurality of parallel fins l2 and 13' respectively as best shown by Fig. 4.
- the fins l2 and I3 are preferably integral with the side walls which are Joined and suitably clamped together at the ends I! and IS.
- the length and spacing of the fins l2 and I3 are such that when the side walls I2 and I3 are clamped together, the fins are spaced and interleaved with respect to each other, i. e.
- Fig. 2 which illustrates but half the extinguishing structure, namely the side wall l3, the fins extend in a direction transverse to the direction of the movement of the are as it passes from the entrance I1 into the chute.
- Fig. 6 which shows a transverse section of the zigzag arc passage defined by the fins i2 and IS
- the fins are shown as tapered toward the entrance of the chute.
- the tapering edge is preferably defined .-by a curvilinear contour as illustrated so that the angle alpha" defined by the intersection of the curved edges is acute and not appreciably in excess of 20.
- the angle alpha is but diagrammatically indicated in Fig. 6 and it should be clearly understood that the angle is measured substantially at or immediately beyond the indicated intersection of the fin edges. I have found that this angle should be very sharp, for
- angles between 20 and 30 can be used although to less advantage.
- the switch contacts and the magnetic blowout structures can assume any preferred form and constitute no part of the present invention.
- the magnetic blowout coils ID are electrically connected to the conductor stud l and to the arc runner I so that the arc current traverses the blowout coils in a manner well-known in the art.
- the current is carried in the closed circuit position of the breaker by the spring biased contact 2', the current being shunted to the arcing contact 2 upon opening of the breaker.
- the arc is drawn by the movable contact 3 it is transferred to the arc runner N (Fig. 2) when the contact passes the position indicated by Fig.
- blowout coil H which is electrically connected at 3 to the conductor stud 8
- the blowout coils are energized by the arc current to influence the arc in a well-known manner.
- iron pole pieces l9 are secured along the outer sides of the extinguishing device as illustrated by Fig. 4.
- the arc extinguishing structure above described is very effective for interrupting both overload and short circuit currents, the arc, along with the ignited gases, may in certain instances be expelled from the exhaust 'end of the interrupter. Since this is generally objectionable in practice even though the arc may be ultimately extinguished, I have provided means for suppressing the are at the chute exhaust and for cooling the highly heated arc gases without creating excessive back pressure which would decrease the interrupting capacity of the breaker.
- arc suppressing structure can be incorporated in the side walls l2 and I3 or take the form of a detachable unit 20 illustrated by Figs. 3 and wherein a pair of spaced insulating strips 2
- the insulating ferred form of my invention a plurality of alter-. nately disposed fibre and copper spacing plates or sheets 25 and 26 respectively.
- the copper sheets are corrugated or crimped as illustrated so as to form passages for the arc gases from the chute while at the same time providing maximum cooling surface.
- the copper sheets 26 correspond in width to that of the-recesses 2
- This arrangement provides improved insulation for the copper sheets, and results in improved performance, particularly in the case of high voltage power arcs.
- the fibre and copper sheets can simply be stacked between the insulating side walls 2
- the unit 20 which also functions as a muffler as well as an arc suppressor, cooperates with the arc chute in different ways so that, the interrupting capacity of the arc chute is greatly increased. Also the interrupting characteristics are greatly improved. By way of example, I have found that by the addition of my improved arc suppressor, the interrupting ability of the chute in certain tests was increased approximately 50%.
- my improved arc suppressor functions to supplement the arc chute in interrupting high current arcs in the following manner.
- the closely stacked fibre sheets and their copper spacing elements function as a throttling device at the chute exhaust to prevent too rapid discharge of the explosive arc and its products through the chute body.
- the suppressor 20 upon the drawing of an arc between the separating contacts, the suppressor 20 immediately functions to maintain a cushion of air within the chute body to oppose the free progress of the arc and its products.
- the whole of the initially cool chute inner surfaces are more efficiently employed in progressively cooling the advancing heat wave (thereby extracting are heat energy) to increase the arcs resistance and thus expedite its decay and extinguishment.
- This cushioning eifect automatically adjusts itself as in a dashpot, for the greater the surge of this are heat and pressure wave, as during the interruption of very heavy short circuits, the greater becomes the cushioning tending to regulate its advance.
- vanced arc loops or heat wave crests may approach the suppressor 20.
- the overhanging fibre edges of the plates 25 are encountered which, thereupon, emit arc extinguishing gas under the influence of the are heat.
- Such advance are crests are, therefore, automatically repelled by these localized back pressure areas.
- the are heat wave' is further cooled and more energy is extracted as it approaches this newly formed cooling agent.
- the throttling action already discussed is also responsible for another beneficial effect in that the increased pressure within the chute causes increased dielectric strength of the gas which accordingly further aids interruption.
- this aggregate retardation efiect from throttling and gas emissivity provides a very flexible and self -adjusting agency for controlling arcs throughout a wide range of current values, the essential features being that the arc is regulated in its progress and kept within the chute body where it is most effectively extinguished. Interruption is attended with minimum circuit and physical disturbance, while at the same time the residual arc products are not unduly impeded in passing through the suppressors grid-like structure, during which further cooling of these gases takes place.
- I also may use stacked and spaced insulating sheets of non-gaseous emitting material which will also function, in part, like the fibre sheets by providing throttling means alone in order to extend the arcs brief passage through the zigzag chute structure.
- the specific construction of the suppressor can take different forms in accordance with my invention. For example, a great part of the advantages can be retained and the construction simplified by using a single grid-like structure comprising a unitary plate of fibre, or other suitable insulating material, that is slotted or perforated to give the throttling or repelling action described.
- the slots in eifect would define thin individual grid members which may extend either transversely or longitudinally of .the chute exhaust opening.
- the spacing between the stacked gas-emitting sheets may also be varied to suit particular conditions.
- the arc suppressing unit of Fig. 3 can readily be secured to the exhaust part of the main extinguishing structure, such as by securing the insulating strips 2
- an insulating casing 28 can be mounted on the frame I. As shown, the casing 28 is provided at the exhaust end of the chute with a detachable insulating cover member 29 coacting with a wedge shaped insulating deflector member 30 for diverting the heated arc gases into opposite sides of the casing 28. A portion of the wedge is secured to the cover 29 and the tapered part 30' is mounted in the unit 20.
- the cover 29 is provided with an insulating deflector 3
- This arrangement divides the gas exhaust substantially equally and deflects the two streams of gas backward along the outer walls of the extinguishing device.
- the gas so cooled and deflected can now fiow harmlessly through the grills 32 at opposite sides of the casing 28 as shown by Figs. 2 and 7.
- the gas deflecting and dissipating arrangement above referred to comprises no part of the present invention and is specifically disclosed and claimed in a copending application Serial No. 298,925, filed concurrently herewith by E. W. Boehne for Electric air circuit breaker.
- An electric air circuit breaker comprising relatively movable contacts between which a power arc may be formed upon opening of the circuit, an arc extinguishing structure into which said arc is driven comprising spaced insulating side walls, each wall. having extending from its side facing the other wall a plurality of fins extending in spaced relation longitudinally in a direction generally transversely of said arc, portions of said fins being interleaved and overlapped with respect to each other so as to form a narrow zigzag arc passage between the spaced overlapped fins, said fins being tapered in height toward the arc entrance of said extinguishing structure so as to define between overlapping edges of interleaving fins at the apparent point of intersection a sharp acute arc-entrance angle of 20 or less.
- An electric air circuit breaker including relatively movable contacts between which a power are may be formed upon opening of the circuit and are extinguishing structure for receiving said are comprising a chute having spaced insulating side walls, are cooling and suppressing means disposed in the space between said side walls, and additional arc suppressing means compactly disposed at the exhaust end of said chute for confining arcing within said chute comprising a plurality of closely spaced alternately disposed insulating and conducting plates.
- An electric air circuit breaker including relatively movable contacts between which a power arc may be formed upon opening of the circuit and are extinguishing structure forreceiving said are comprising a chute having spaced insulating side walls, arc cooling and suppressing means disposed in the space between said side walls, and additional arc suppressing means compactly disposed at the exhaust end of said chute for confining arcing within said chute comprising a plurality of closely spaced cooling plates including thin corrugated copper sheets.
- An electric air circuit breaker including relatively movable contacts between which a power arc may be formed upon opening of the circuit and are extinguishing structure for receiving said are comprising a chute having spaced insulating side walls, and are suppressing means disposed at the exhaust end of said chute comprising a plurality of closely spaced cooling members including alternately disposed fibre and deformed copper sheets, said fibre sheets overhanging the exposed edgcs of said copper sheets.
- An electric air circuit breaker including relatively movable contacts between which a power arc may be formed upon opening of the circuit and an insulating chute for receiving said arc, arc cooling and suppressing means disposed within said chute including interleaving fins arranged to form a zigzag passage for the arc path wall a.
- ridges of one wall being closely adjacent to, overlapping and staggered with respect to ridges of the opposite wall so that the arc in passing through said chute is forced to take a tortuous closely confined path around the outer edges of said ridges to increase the length of and attenuate said arc, said ridges being tapered in height toward the arc entrance of said chute so as to define between overlapping ridges of opposite walls at the apparent point of intersection a sharp acute arc-entrance angle of 20" or less.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
Priority Applications (22)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US298946A US2293513A (en) | 1939-10-11 | 1939-10-11 | Electric air circuit breaker |
US349220A US2293452A (en) | 1939-10-11 | 1940-08-01 | Electric air circuit breaker |
US34930540 US2270723A (en) | 1939-10-11 | 1940-08-01 | Arc shield |
US359363A US2306204A (en) | 1939-10-11 | 1940-10-02 | Electric arc extinguishing apparatus |
US359371A US2314292A (en) | 1939-10-11 | 1940-10-02 | Electric arc-extinguishing apparatus |
GB15108/40A GB541612A (en) | 1939-10-11 | 1940-10-10 | Improvements in electric air break circuit breakers |
DEL102063D DE767738C (de) | 1939-10-11 | 1940-10-10 | Elektrischer Leistungsluftschalter mit Lichtbogenkammer |
FR877644D FR877644A (fr) | 1939-10-11 | 1940-10-11 | Perfectionnements aux écrans contre l'action des arcs |
FR867464D FR867464A (fr) | 1939-10-11 | 1940-10-11 | Perfectionnements aux disjoncteurs |
US403988A US2293487A (en) | 1939-10-11 | 1941-07-25 | Electric circuit breaker |
GB9605/41A GB549540A (en) | 1939-10-11 | 1941-07-29 | Improvements in and relating to arc shields |
DEL105017D DE740646C (de) | 1939-10-11 | 1941-07-31 | Funkenkammer fuer elektrische Leistungsschalter |
FR52067D FR52067E (fr) | 1939-10-11 | 1941-09-23 | Perfectionnements aux disjoncteurs |
GB12682/41A GB545868A (en) | 1939-10-11 | 1941-10-01 | Improvements in and relating to electric arc extinguishing apparatus |
GB12723/41A GB550819A (en) | 1939-10-11 | 1941-10-02 | Improvements in and relating to electric arc-extinguishing apparatus |
FR52103D FR52103E (fr) | 1939-10-11 | 1941-11-26 | Perfectionnements aux disjoncteurs |
BE446034D BE446034A (fr) | 1939-10-11 | 1942-06-20 | |
FR52381D FR52381E (fr) | 1939-10-11 | 1942-07-16 | Perfectionnements aux disjoncteurs |
BE447160D BE447160A (fr) | 1939-10-11 | 1942-09-15 | |
BE449237D BE449237A (fr) | 1939-10-11 | 1943-02-17 | |
DEL106680A DE762739C (de) | 1939-10-11 | 1944-12-20 | Elektrischer Stromunterbrecher, insbesondere Schalter |
DEA20902A DE969869C (de) | 1939-10-11 | 1946-02-26 | Elektrischer Stromunterbrecher |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US298946A US2293513A (en) | 1939-10-11 | 1939-10-11 | Electric air circuit breaker |
Publications (1)
Publication Number | Publication Date |
---|---|
US2293513A true US2293513A (en) | 1942-08-18 |
Family
ID=23152678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US298946A Expired - Lifetime US2293513A (en) | 1939-10-11 | 1939-10-11 | Electric air circuit breaker |
Country Status (5)
Country | Link |
---|---|
US (1) | US2293513A (fr) |
BE (3) | BE446034A (fr) |
DE (4) | DE767738C (fr) |
FR (5) | FR867464A (fr) |
GB (4) | GB541612A (fr) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2442199A (en) * | 1943-12-15 | 1948-05-25 | Westinghouse Electric Corp | Circuit interrupter |
US2575730A (en) * | 1947-03-13 | 1951-11-20 | Westinghouse Electric Corp | Circuit breaker |
US2615109A (en) * | 1949-12-10 | 1952-10-21 | Gen Electric | Zigzag magnetic labyrinth arc muffler |
US2625627A (en) * | 1947-02-27 | 1953-01-13 | Canadian Controllers Ltd | High-voltage contactor system |
US2633518A (en) * | 1948-07-01 | 1953-03-31 | Roller Smith Corp | Air circuit breaker |
US2646482A (en) * | 1947-01-11 | 1953-07-21 | Ite Circuit Breaker Ltd | High-voltage circuit breaker |
US2709735A (en) * | 1952-08-01 | 1955-05-31 | Gen Electric | Arc chute for electric circuit breakers |
US2816992A (en) * | 1954-11-26 | 1957-12-17 | Westinghouse Electric Corp | Circuit interrupters |
US2825008A (en) * | 1953-06-02 | 1958-02-25 | Ohio Brass Co | Lightning arresters |
US2942086A (en) * | 1957-03-06 | 1960-06-21 | Allis Chalmers Mfg Co | Chimney cooler for air circuit breakers |
US2947839A (en) * | 1957-02-28 | 1960-08-02 | Allis Chalmers Mfg Co | Arc chute having cooling and deionizing elements arranged at the exhaust end |
US3025376A (en) * | 1958-05-13 | 1962-03-13 | Ite Circuit Breaker Ltd | Arc chute for circuit breakers |
US3033961A (en) * | 1960-05-04 | 1962-05-08 | Ite Circuit Breaker Ltd | Serpentine corrugated arc product coolers |
US3555224A (en) * | 1968-12-23 | 1971-01-12 | Gen Electric | Arc chute for an air circuit breaker |
US4011425A (en) * | 1975-01-03 | 1977-03-08 | I-T-E Imperial Corporation | Arc chute extension for increased interruption rating |
US20070068904A1 (en) * | 2005-09-26 | 2007-03-29 | Abb Technology Ag | High-voltage circuit breaker with improved circuit breaker rating |
US20110075313A1 (en) * | 2009-09-30 | 2011-03-31 | Keith Comendant | Plasma arrestor insert |
CN109727713A (zh) * | 2019-02-11 | 2019-05-07 | 洛阳正奇机械有限公司 | 一种紫铜波纹管结构的大功率充电桩串冷电缆 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB776747A (en) * | 1954-03-16 | 1957-06-12 | Reyrolle A & Co Ltd | Improvements relating to high-voltage electric circuit-breakers of the air-break type |
BE548341A (fr) * | 1955-06-03 | |||
BE545609A (fr) * | 1955-08-29 | |||
DE1064589B (de) * | 1955-11-10 | 1959-09-03 | Licentia Gmbh | Elektrischer Schalter mit Lichtbogenloeschkammer und mit magnetischer Blasung |
DE1087217B (de) * | 1958-09-10 | 1960-08-18 | Licentia Gmbh | Magnetblasschalter |
US2987596A (en) * | 1958-12-06 | 1961-06-06 | Asea Ab | Scavenging means for air blast circuit breaker |
LU36750A1 (fr) * | 1959-01-08 | 1960-07-08 | ||
FR1224133A (fr) * | 1959-01-20 | 1960-06-22 | Merlin Gerin | Perfectionnements à des dispositifs d'extinction d'arc |
DE1168529B (de) * | 1961-06-26 | 1964-04-23 | Licentia Gmbh | Elektrisches Schaltgeraet mit Einrichtung zur Lichtbogenloeschung |
DE1253333B (de) * | 1964-11-23 | 1967-11-02 | Stotz Kontakt Gmbh | Lichtbogenloeschkammer mit Deionblechen |
DE102007001802B4 (de) * | 2006-12-22 | 2010-02-25 | Abb Ag | Elektrisches Schaltgerät |
DE102014201867A1 (de) | 2013-02-22 | 2014-08-28 | Magna Powertrain Ag & Co. Kg | Kupplungsscheibe |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE285505C (fr) * | ||||
GB191202413A (en) * | 1911-01-31 | Siemens Schuckertwerke Gmbh | Improvements in Magnetic Blow-outs for Electric Switches or the like. | |
DE507139C (de) * | 1927-11-19 | 1930-09-12 | Kontakt A G | Kontaktanordnung fuer Schalter mit magnetischer Lichtbogenblasung |
US1878959A (en) * | 1928-09-27 | 1932-09-20 | Westinghouse Electric & Mfg Co | Circuit interrupter |
US1861128A (en) * | 1928-12-28 | 1932-05-31 | Milliken Humphreys | High-power circuit-breaker |
DE555778C (de) * | 1929-01-18 | 1932-07-28 | Siemens Schuckertwerke Akt Ges | Entionisierungsvorrichtung zum Loeschen von Lichtboegen |
DE584993C (de) * | 1929-12-03 | 1933-09-27 | Siemens Ag | Vorrichtung fuer die Lichtbogenloeschung in Fluessigkeitsschaltern |
US1914137A (en) * | 1931-01-24 | 1933-06-13 | Westinghouse Electric & Mfg Co | Circuit interrupter |
DE293332C (fr) * | 1930-08-14 | |||
US2037418A (en) * | 1931-01-24 | 1936-04-14 | Westinghouse Electric & Mfg Co | Circuit breaker |
DE616479C (de) * | 1931-08-14 | 1935-07-30 | Voigt & Haeffner Akt Ges | Anordnung zur Loeschung des Unterbrechungslichtbogens elektrischer Schalter |
DE574960C (de) * | 1931-10-02 | 1933-04-21 | Siemens Schuckertwerke Akt Ges | Entionisierungsvorrichtung zum Loeschen des Unterbrechungslichtbogens von Schaltern |
FR745721A (fr) * | 1931-10-19 | 1933-05-13 | ||
DE652481C (de) * | 1932-11-25 | 1937-11-01 | Const Electr De Delle Sa Atel | Elektrischer Blasschalter |
BE408296A (fr) * | 1934-03-20 | |||
DE728612C (de) * | 1934-10-20 | 1942-11-30 | Siemens Ag | Schalter mit Lichtbogenkammer |
US2109226A (en) * | 1936-01-30 | 1938-02-22 | Westinghouse Electric & Mfg Co | Circuit breaker |
-
1939
- 1939-10-11 US US298946A patent/US2293513A/en not_active Expired - Lifetime
-
1940
- 1940-10-10 DE DEL102063D patent/DE767738C/de not_active Expired
- 1940-10-10 GB GB15108/40A patent/GB541612A/en not_active Expired
- 1940-10-11 FR FR867464D patent/FR867464A/fr not_active Expired
- 1940-10-11 FR FR877644D patent/FR877644A/fr not_active Expired
-
1941
- 1941-07-29 GB GB9605/41A patent/GB549540A/en not_active Expired
- 1941-07-31 DE DEL105017D patent/DE740646C/de not_active Expired
- 1941-09-23 FR FR52067D patent/FR52067E/fr not_active Expired
- 1941-10-01 GB GB12682/41A patent/GB545868A/en not_active Expired
- 1941-10-02 GB GB12723/41A patent/GB550819A/en not_active Expired
- 1941-11-26 FR FR52103D patent/FR52103E/fr not_active Expired
-
1942
- 1942-06-20 BE BE446034D patent/BE446034A/xx unknown
- 1942-07-16 FR FR52381D patent/FR52381E/fr not_active Expired
- 1942-09-15 BE BE447160D patent/BE447160A/xx unknown
-
1943
- 1943-02-17 BE BE449237D patent/BE449237A/xx unknown
-
1944
- 1944-12-20 DE DEL106680A patent/DE762739C/de not_active Expired
-
1946
- 1946-02-26 DE DEA20902A patent/DE969869C/de not_active Expired
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2442199A (en) * | 1943-12-15 | 1948-05-25 | Westinghouse Electric Corp | Circuit interrupter |
US2646482A (en) * | 1947-01-11 | 1953-07-21 | Ite Circuit Breaker Ltd | High-voltage circuit breaker |
US2625627A (en) * | 1947-02-27 | 1953-01-13 | Canadian Controllers Ltd | High-voltage contactor system |
US2575730A (en) * | 1947-03-13 | 1951-11-20 | Westinghouse Electric Corp | Circuit breaker |
US2633518A (en) * | 1948-07-01 | 1953-03-31 | Roller Smith Corp | Air circuit breaker |
US2615109A (en) * | 1949-12-10 | 1952-10-21 | Gen Electric | Zigzag magnetic labyrinth arc muffler |
US2709735A (en) * | 1952-08-01 | 1955-05-31 | Gen Electric | Arc chute for electric circuit breakers |
US2825008A (en) * | 1953-06-02 | 1958-02-25 | Ohio Brass Co | Lightning arresters |
US2816992A (en) * | 1954-11-26 | 1957-12-17 | Westinghouse Electric Corp | Circuit interrupters |
US2947839A (en) * | 1957-02-28 | 1960-08-02 | Allis Chalmers Mfg Co | Arc chute having cooling and deionizing elements arranged at the exhaust end |
US2942086A (en) * | 1957-03-06 | 1960-06-21 | Allis Chalmers Mfg Co | Chimney cooler for air circuit breakers |
US3025376A (en) * | 1958-05-13 | 1962-03-13 | Ite Circuit Breaker Ltd | Arc chute for circuit breakers |
US3033961A (en) * | 1960-05-04 | 1962-05-08 | Ite Circuit Breaker Ltd | Serpentine corrugated arc product coolers |
US3555224A (en) * | 1968-12-23 | 1971-01-12 | Gen Electric | Arc chute for an air circuit breaker |
US4011425A (en) * | 1975-01-03 | 1977-03-08 | I-T-E Imperial Corporation | Arc chute extension for increased interruption rating |
US20070068904A1 (en) * | 2005-09-26 | 2007-03-29 | Abb Technology Ag | High-voltage circuit breaker with improved circuit breaker rating |
US8389886B2 (en) | 2005-09-26 | 2013-03-05 | Abb Technology Ag | High-voltage circuit breaker with improved circuit breaker rating |
US20110075313A1 (en) * | 2009-09-30 | 2011-03-31 | Keith Comendant | Plasma arrestor insert |
US8503151B2 (en) * | 2009-09-30 | 2013-08-06 | Lam Research Corporation | Plasma arrestor insert |
CN109727713A (zh) * | 2019-02-11 | 2019-05-07 | 洛阳正奇机械有限公司 | 一种紫铜波纹管结构的大功率充电桩串冷电缆 |
CN109727713B (zh) * | 2019-02-11 | 2023-08-18 | 洛阳正奇机械有限公司 | 一种紫铜波纹管结构的大功率充电桩串冷电缆 |
Also Published As
Publication number | Publication date |
---|---|
GB541612A (en) | 1941-12-03 |
GB550819A (en) | 1943-01-26 |
DE767738C (de) | 1953-04-16 |
FR52103E (fr) | 1943-08-17 |
DE762739C (de) | 1954-10-11 |
DE740646C (de) | 1943-10-25 |
BE449237A (fr) | 1943-03-31 |
FR867464A (fr) | 1941-11-03 |
GB549540A (en) | 1942-11-25 |
GB545868A (en) | 1942-06-16 |
FR52381E (fr) | 1944-03-14 |
DE969869C (de) | 1958-07-24 |
FR877644A (fr) | 1942-12-15 |
BE446034A (fr) | 1942-07-31 |
FR52067E (fr) | 1943-08-13 |
BE447160A (fr) | 1942-10-31 |
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