EP0206249B1 - Coupe-circuit - Google Patents
Coupe-circuit Download PDFInfo
- Publication number
- EP0206249B1 EP0206249B1 EP86108334A EP86108334A EP0206249B1 EP 0206249 B1 EP0206249 B1 EP 0206249B1 EP 86108334 A EP86108334 A EP 86108334A EP 86108334 A EP86108334 A EP 86108334A EP 0206249 B1 EP0206249 B1 EP 0206249B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fixed
- moving
- conductor
- contact point
- pressure reflector
- 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
- 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
- H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
-
- 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
- H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
Definitions
- the present invention relates generally to a circuit breaker, and particularly concerns a circuit breaker for a power line which is of a type comprising an insulation barrier for isolation between power source side and load side, and is improved for prevention of undesirable decrease of insulation characteristic due to deposition of fine granules of conductive substance around the insulation structure around fixed contact and fixed conductor.
- FIG.3 and FIG.4 A typical example of the conventional circuit breaker (see for example US-A- 3,599,130, figure 1) having pressure reflectors both for a fixed contact and a moving contact is shown in FIG.3 and FIG.4.
- a fixed contact 1 of power source side comprises a fixed conductor 1a and a fixed contact point 1b which is provided on end tip part of the fixed conductor 1a.
- An arc runner 2 which is made of a metal is provided at a vicinity of the fixed contact point 1b.
- a fixed pressure reflector 3 which is usually made of an insulative material, such as phenol resin or PBA (polybuthylenetelephtalate) resin or a high resistivity substance (e.g. tungsten-containing metal) which has a higher specific resistance than the fixed conductor 1a is provided to surround the fixed contact point 1b and also to cover the fixed conductor 1a.
- a moving contact 4 comprises a moving conductor 4a and a moving contact point 4b connected to a near end part of the moving conductor 4a.
- the other end of the moving contact 4 is connected to a known moving mechanism for making circuit breaking operation and circuit interrupting operation.
- a known moving mechanism for making circuit breaking operation and circuit interrupting operation.
- Such known mechanism is disclosed in detail, for instance, in the United States Patent No. 3,599,130. Since the mechnism and operation of the moving contact 4 is not the gist of the present invention, the detailed description of the moving mechanism is omitted.
- a moving pressure reflector 5 is provided so as to surround the moving contact point 4b, and also to cover the moving conductor 4a.
- the moving pressure reflector 5 is made of an insulative substance or a high resistance substance which has higher specific resistance than the moving conductor 4a.
- An insulation barrier 6 is disposed on the fixed pressure reflector 3, so as to isolate a space P of power source side wherein the fixed contact 1 and a known arc extinguisher 7 are disposed from a space L of load side wherein moving mechanism of the moving contact 4 is disposed.
- the insulative barrier 6 is made of, for instance, a glass-fiber-reinforced polyesther, or the like, insulative sheet and has a vertically oblong hole 6b wherein the moving contact 4 moves. Furthermore, the insulation barrier 6 has, at its lower foot part or base, an indent 6a in which the fixed pressure reflector 3 is to be inserted when a circuit breaker is assembled. By such configuration, the insulation barrier 6 separates the power source side space P in the right side of FIG.3 and the load side space L in the left side thereof.
- the present invention is made to solve the above-mentioned problem of the prior art circuit breaker, by providing a circuit breaker which is capable of improving insulation characteristic between the power source side space and load side space by preventing breakdown of the insulation due to deposition of powder or fine granule of conductive substance on the surface of the fixed pressure reflector.
- the above-mentioned object is accomplished by providing at least one oblong protrusion on the surface of the fixed pressure reflector in a manner to be parallel along or at the vicinity of the foot part of an insulation barrier provided on the fixed pressure reflector.
- a circuit breaker in accordance with the present invention comprises a fixed contact, having a fixed conductor and a fixed contact point disposed at one end part of the fixed conductor, a fixed pressure reflector disposed to surround the fixed contact point and to cover the fixed conductor, a moving contact having a moving conductor and a moving contact point disposed at one end part of the moving conductor, a moving pressure reflector disposed to surround the moving contact point and to cover the moving conductor, an insulation barrier disposed above the fixed pressure reflector to isolate power source side space and load side space, wherein the improvement is that the fixed pressure reflector has at least one oblong protrusion provided protruding parallelly along the foot part of the insulation barrier.
- FIG.1 is a partly sectional side view of a principal part of a circuit breaker embodying the present invention.
- FIG.2 is a perspective view showing a principal part of the embodiment of FIG.1.
- FIG.3 is the partly sectional view of the conventional circuit breaker.
- FIG.4 is the perspective view of the conventional circuit breaker of FIG.3.
- FIG.1 and FIG.2 A preferred embodiment of the present invention is shown in FIG.1 and FIG.2.
- a fixed contact 1 of power source side comprises a fixed conductor 1a and a fixed contact point 1b which is provided on end tip part of the fixed conductor 1a.
- An arc runner 2 which is made of a metal is provided at a vicinity of the fixed contact point 1b.
- the fixed pressure reflector 3 is provided with at least one oblong protrusion. In the embodiment of FIG.1, two oblong protrusions are provided.
- An insulation barrier 6 is provided above the fixed pressure reflector 3, in a manner to isolate a space P of power source side wherein the fixed contact 1, the fixed contact point 1b and a moving contact point 4b and a known arc extinguisher 7 are disposed from a space L of load side wherein moving mechanism for a moving contact 4 is disposed.
- the insulative barrier 6 is made of, for instance, a glass fiber-reinforced polyesther, or similar insulative sheet and has a vertically oblong hole 6b wherein the moving contact 4 moves. Furthermore, the insulation barrier 6 has, at its lower foot part or base 6c, an indent 6a in which the fixed pressure reflector 3 is to be inserted when a circuit breaker is assembled.
- the two oblong protrusions 8a and 8b are provided substantially in parallel with the foot part 6c of the insulation barrier which is mounted on the fixed pressure reflector 3 at the part of the indent 6a. Therefore, the foot part 6c of the insulation barrier 6 is easily disposed between the two oblong protrusions 8a and 8b.
- the moving contact 4 comprises a moving conductor 4a and the moving contact point 4b connected to a near end part of the moving conductor 4a.
- the other end of the moving contact 4 is connected to a known moving mechanism for making circuit breaking operation and circuit interruption operation. Since the mechanism is known and not the gist of the present invention, description and illustration of the details thereof are omitted.
- a moving pressure reflector 5 is provided so as to surround the moving contact point 4b and also to cover the moving conductor 4a.
- the moving pressure reflector 5 is made of an insulative substance or a high resistance substance which has higher specific resistance than the moving conductor 4a.
- the embodiment shows provision of two oblong protrusions 8a and 8b
- the gist of the invention is not limited thereto. That is, provision of only one oblong protrusion is still effective in improving the insulation characteristic to a considerable extent.
Landscapes
- Breakers (AREA)
Claims (3)
- Un disjoncteur comprenant :
un contact fixe (1) ayant un conducteur fixe (1a) et un point de contact fixe (1b) placé dans une partie d'extrémité du conducteur fixe,
un réflecteur de pression fixe (3) disposé de façon à entourer le point de contact fixe (1b) et à recouvrir le conducteur fixe (1a),
un contact mobile (4) ayant un conducteur mobile (4a) et un point de contact mobile (4b) placé dans une partie d'extrémité du conducteur mobile,
un réflecteur de pression mobile (5) disposé de façon à entourer le point de contact mobile (4b) et à recouvrir le conducteur mobile (4a), et
une barrière d'isolation (6) comportant une base (6c) qui est montée sur le réflecteur de pression fixe (3), pour isoler l'espace du côté de la source d'énergie (P) et l'espace du côté de la charge (L),
caractérisé en ce que
le réflecteur de pression fixe (3) comporte au moins une saillie oblongue (8a) qui est formée en saillie parallèlement à la base (6c), sur toute la largeur du réflecteur de pression fixe (3). - Un disjoncteur selon la revendication 1, dans lequel une paire des saillies oblongues précitées (8a, 8b) sont formées de façon pratiquement parallèle de part et d'autre de la partie de base (6c) de la barrière d'isolation (6).
- Un disjoncteur selon la revendication 1 ou 2, dans lequel la barrière d'isolation (6) comporte
un trou oblong (6b) dans lequel le conducteur mobile (4a) se déplace dans la direction longitudinale de ce trou, pour l'ouverture et la fermeture du point de contact mobile et du point de contact fixe, et
une indentation (6a) destinée à recevoir le réflecteur de pression fixe (3).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60098135A JPS60246357A (ja) | 1984-05-10 | 1985-05-10 | 電荷移動用両水性有機錯体、導電体または導電体の前駆体 |
JP98135/85 | 1985-06-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0206249A2 EP0206249A2 (fr) | 1986-12-30 |
EP0206249A3 EP0206249A3 (en) | 1988-01-20 |
EP0206249B1 true EP0206249B1 (fr) | 1991-09-11 |
Family
ID=14211795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86108334A Expired - Lifetime EP0206249B1 (fr) | 1985-05-10 | 1986-06-19 | Coupe-circuit |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0206249B1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1264164B1 (it) * | 1993-04-21 | 1996-09-17 | Sace Spa | Interruttore di bassa tensione in scatola isolante |
US5581063A (en) * | 1995-06-26 | 1996-12-03 | Square D Company | Arc-resistant shield for protecting a movable contact carrier of a circuit breaker |
US5899323A (en) * | 1998-05-07 | 1999-05-04 | Eaton Corporation | Electrical switching apparatus with contact finger guide |
US7863537B2 (en) * | 2007-10-09 | 2011-01-04 | Eaton Corporation | Gassing insulator assembly, and conductor assembly and electrical switching apparatus employing the same |
US9401251B2 (en) | 2012-05-16 | 2016-07-26 | General Electric Company | Molded case circuit breaker |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS492468B1 (fr) * | 1968-07-15 | 1974-01-21 | ||
US3997746A (en) * | 1974-04-23 | 1976-12-14 | Airpax Electronics, Incorporated | Circuit breaker with arc chamber screen |
JPS5830254U (ja) * | 1981-08-24 | 1983-02-26 | 三菱電機株式会社 | 回路しや断器 |
US4581511A (en) * | 1984-09-28 | 1986-04-08 | Westinghouse Electric Corp. | Molded case circuit breaker with an improved internal venting system |
-
1986
- 1986-06-19 EP EP86108334A patent/EP0206249B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0206249A2 (fr) | 1986-12-30 |
EP0206249A3 (en) | 1988-01-20 |
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