AU735933B2 - An extinguishing chamber for a circuit breaker with self-extinguishing expansion and rotating arc - Google Patents
An extinguishing chamber for a circuit breaker with self-extinguishing expansion and rotating arc Download PDFInfo
- Publication number
- AU735933B2 AU735933B2 AU13230/99A AU1323099A AU735933B2 AU 735933 B2 AU735933 B2 AU 735933B2 AU 13230/99 A AU13230/99 A AU 13230/99A AU 1323099 A AU1323099 A AU 1323099A AU 735933 B2 AU735933 B2 AU 735933B2
- Authority
- AU
- Australia
- Prior art keywords
- contact
- coil
- extinguishing chamber
- extinguishing
- arc
- 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.)
- Ceased
Links
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 4
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- 239000011796 hollow space material Substances 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 235000009917 Crataegus X brevipes Nutrition 0.000 claims 1
- 235000013204 Crataegus X haemacarpa Nutrition 0.000 claims 1
- 235000009685 Crataegus X maligna Nutrition 0.000 claims 1
- 235000009444 Crataegus X rubrocarnea Nutrition 0.000 claims 1
- 235000009486 Crataegus bullatus Nutrition 0.000 claims 1
- 235000017181 Crataegus chrysocarpa Nutrition 0.000 claims 1
- 235000009682 Crataegus limnophila Nutrition 0.000 claims 1
- 235000004423 Crataegus monogyna Nutrition 0.000 claims 1
- 240000000171 Crataegus monogyna Species 0.000 claims 1
- 235000002313 Crataegus paludosa Nutrition 0.000 claims 1
- 235000009840 Crataegus x incaedua Nutrition 0.000 claims 1
- 229910001080 W alloy Inorganic materials 0.000 claims 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
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
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H33/185—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
-
- 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
- H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
- H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
I/UU/U11 2W5/91 Regulation 3.2(2)
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT oooo
A
A
A
ft Application Number: Lodged: Invention Title: AN EXTINGUISHING CHAMBER FOR A CIRCUIT BREAKER WITH SELF-EXTINGUISHING EXPANSION AND ROTATING ARC
A.*
A A A A oo The following statement is a full description of this invention, including the best method of performing it known to us AN EXTINGUISHING CHAMBER FOR A CIRCUIT BREAKER WITH SELF- EXTINGUISHING EXPANSION AND ROTATING ARC
FIELD
The invention relates to an extinguishing chamber for a high voltage circuit breaker isolated by a high dielectric strength gas, and equipped with an arc extinguishing device by self-expansion of the gas, said chamber comprising: an enclosure made of insulating material containing a stationary contact device operating in conjunction with a movable contact arranged at the end of a conducting tube, which passes with sliding through one of the panels of the enclosure moving between a closed position and an open position of the contacts, an electromagnetic coil for rotation of the arc on the contact track situated on the front face of the coil, said coil being securedly affixed to the stationary contact device to form an overhanging module on the opposite panel of the 15 enclosure, means for the chamber to communicate with the external volume of the enclosure when self-expansion of the gas takes place after the contacts have s....eparated, :l--the stationary contact device being coaxially surrounded by the cylindrical 20 coil, and comprising a plurality of contact fingers circumferentially arranged to confine a hollow space receiving the movable contact.
BACKGROUND ART In know extinguishing chambers of the kind mentioned, flow of the rated current generally takes place in a main circuit equipped with stationary and movable main contacts which separate before the arcing contacts open, and which close after the arcing contacts have closed. The main circuit is formed by a circuit independent from the arcing circuit and is arranged either coaxially around the coil or offset laterally with respect to the arcing circuit (in particular described in the document EP-A-768,692). The complex architecture of such an extinguishing chamber of the circuit breaker is not suited to a sub-station requiring small dimensions.
In the circuit breaker of the document US-A-4,431,886, the coil is permanently excited by the rated current when the contacts are closed.
The object of the invention is to achieve an improved extinguishing chamber for a self-extinguishing expansion circuit breaker able to be housed in a compact sub-station.
SUMMARY OF THE INVENTION According to the present invention there is provided an extinguishing chamber extinguishing chamber for a high voltage circuit breaker isolated by a high dielectric strength gas, and equipped with an arc extinguishing device by self-expansion of the gas, said chamber including: an enclosure made of insulating material containing a stationary contact oo device operating in conjunction with a movable contact arranged at the end of a conducting tube, which passes with sliding through one of the panels of the o enclosure moving between a closed position and an open position of the 15 contacts, an electromagnetic coil for rotation of the arc on the contact track situated on the front face of the coil, said coil being securedly affixed to the stationary contact device to form an overhanging module on the opposite panel of the enclosure.
20 means for the chamber to communicate with the external volume of the enclosure when self-expansion of the gas takes place after the contacts have separated, the stationary contact device being coaxially surrounded by the cylindrical coil, and comprising a plurality of contact fingers arranged circumferentially to confine a hollow space receiving the movable contact.
characterized in that each contact finger of the stationary contact device includes a composite metallic structure having: a copper main body shaped as a cylindrical sector for flow of the permanent current in the closed position of the movable contact, an electrode made of refractory conducting material, brazed onto the front end of the body to constitute a stationary arcing contact arranged near to the arc rotation track, and a segment made of ferromagnetic material brazed onto the periphery of the electrode and of a part of the body, said segment being located inside the coil to obtaining optimum guiding of the arc on the track.
In preferred embodiments the extinguishing chamber is characterized in that each contact finger comprises a composite metallic structure having: a copper main body shaped as a cylindrical sector for flow of the permanent current in the closed position of the movable contact, an electrode made of refractory conducting material, brazed onto the front end of the body to constitute a stationary arcing contact arranged near to the arc rotation track 15 and a segment made of ferromagnetic material brazed onto the periphery of the electrode and of a part of the body, said segment being located inside the coil to obtain optimum guiding of the arc on the track.
~The combined operation of the composite structure of the stationary contact device as main contact and arcing contact, in the internal dimensions of 20 the coil preferably enables very compact extinguishing chamber to be obtained.
According to a preferred embodiment, the electrode is made of a cuprotungsten alloy base and the segment is made of steel. The electrode and the segment of each contact finger are separated from the contact track by an axial gap of small thickness, enabling switching of the arc for excitation of the coil when the movable contact separates from the electrode. Each contact finger is provided with a rear edge mounted with latching on a centring part of a current conducting stud.
According to one embodiment of the invention, the coil is connected to the stud by copper support arms forming spacers separated from the contact fingers by insulating pads. A spring in the form of a curved blade is inserted between each insulating pad and the corresponding contact finger.
The following description of an embodiment of the invention is given as a non-restrictive example only and is represented in the accompanying drawings, in which: Figure 1 is a cross sectional view of the extinguishing chamber according to the invention, represented in the closed position of the contacts;
*S
**g •o Figure 2 is an identical view to figure 1, respectively when separation of the contacts takes place (broken lines) and in the open position (bold lines); Figure 3 is a perspective view of the pre-mounted coil and stationary contact device module; Figure 4 shows an elevational view of figure 3; Figure 5 is a cross sectional view along the line 5-5 of figure 4; Figure 6 shows a perspective view of an elementary contact finger of the stationary contact device; Figure 7 is a top view of a contact finger; o- Figure 8 shows a cross sectional view along the line 8-8 of figure 7; Figure 9 is a cross sectional view along the line 9-9 of figure 7.
In figures 1 and 2, an extinguishing chamber 10 for a pole of a high voltage circuit breaker of the self-extinguishing expansion type comprises an enclosure 12 made of •insulating material and filled with a high dielectric strength gas, notably sulphur hexafluoride SF6. The internal volume of the extinguishing chamber 10 contains a tubular movable contact 14 operating in conjunction with a stationary contact device 16 associated to an electromagnetic coil 18 for rotation of the arc. The movable contact 14 is located at the end of an elongate tube 20 made of conducting material, which is able to slide tightly through one of the panels 22 of the insulating enclosure .i 12. The external end of the tube 20 is coupled to an operating mechanism (not represented) designed to move the movable contact 14 between a closed position (figure 1) and an open position (figure 2).
The stationary contact device 16 is extended by a conducting stud 24 of cylindrical shape passing through the opposite panel 26 in the longitudinal direction of the enclosure 12, and connected to the outside by the connection strip 28 of the pole.
The hollow tube 20 enables the extinguishing chamber 10 to communicate with the external volume of the enclosure 12 as soon as the contacts 14, 16 separate to enable self-expansion of the gas.
The insulating enclosure 12 is formed by abutment of two half-shells 12A, 128 each made by moulding from a polymer resin having a good mechanical strength and thermal resistance.
With reference to figures 3 to 5, the electromagnetic coil 18 used for extinguishing the arc comprises an axial stacking of copper conducting turns 18A adjoined to one another and electrically connected in series by means of fixing screws 30 with interposed intercalated parts 18B made of insulating material. The front face 31 of the coil 18 is provided with an arc migration track 32, said track 32 of annular shape having an internal diameter slightly greater than the diameter of the movable contact 14. The rear turn 33 opposite the front face 31 is connected to the conducting stud 24 by support arms 34 constituting copper spacers, which are separated from the internal stationary contact device 16 by insulating pads 36. Two steel washers 38, are fixed by screws 30 to the rear face of the coil 18, with interposed insulating washers 41.
The stationary contact device 16 of the self-extinguishing expansion circuit breaker ~comprises three contact fingers 42 in the form of circular sectors, circumferentially arranged to form a cylindrical hollow contact. The internal diameter of this hollow contact corresponds appreciably to the external diameter of the movable contact 14, so as to allow telescopic sliding, respectively at the beginning of opening travel and at the end of closing travel of the movable contact 14.
Each contact finger 42 has associated thereto a spring 44 in the form of a curved blade, whose convex face bears on the insulating pad of the corresponding support arm 34. Centring of the three contact fingers 42 with respect to the longitudinal axis of the stationary contact device 16 is performed by means of edges 46 provided at the rear of the contact fingers 42 and mounted with latching on a centring shoulder 48 of the stud 24.
The coil 18 surrounds the stationary contact device 16 coaxially with a small annular clearance, the pre-mounted assembly forming an overhanging module fixed to the panel 26 by means of a nut 50 accessible from the outside of the enclosure 12.
The structure of the stationary contact device 16 inside the coil 18 is arranged to give it a twofold function of stationary main contact for flow of the permanent current and of stationary arcing contact in the separation and current switching phase in the coil 18. In figures 6 to 9, each contact finger 42 is made of a composite metallic structure formed by different materials assembled by brazing. The main body 52 of the contact finger 42 is made of copper and is shaped as a cylindrical sector for flow of the permanent current when the movable contact 14 is in the closed position. A cuprotungsten electrode 54 is brazed onto the rear part of the body 52 situated opposite the latching edge 46. This electrode 54 performs the function of stationary arcing contact for protection of the stationary contact device 16 against the effects of the arc.
The internal cylindrical part of the body 52 is connected to the electrode 54 by a x. curved intermediate part 56 making for ease of insertion of the movable contact 14 in ~the circuit breaker closing phase. A segment 58 made of steel or other ferromagnetic material is brazed onto the periphery of the electrode 54 of the body 52 to perform guiding of the arc and good distribution of the magnetic field generated by the coil 18 -when the arc is switched onto the track 32. The axial length of the segment 58 is S"greater than that of the electrode 54 and extends up to the vicinity of the cylindrical part of the body 52.
Operation of the extinguishing chamber 10 according to the invention is as follows *In the closed position (figure the movable contact 14 is inserted in the stationary contact device 16 and is in engagement with the copper body 52 for flow of the permanent current, which can have a rated intensity of 630 A. The contact pressure is exerted by the springs 44 on the contact fingers 42, and the coil 18 is out of operation, since the whole of the current is flowing through the stud 24, the contact fingers 42, and the movable contact 14 of the tube 20. The striction forces enable a compensation effect to be obtained on the contacts to keep them closed.
Should a short-circuit current occur, the operating mechanism causes the tube 20 to slide upwards and the movable contact 14 to be withdrawn in the direction of the electrode 54. An arc arises as soon as the movable contact 14 separates from the electrode 54, which is separated from the track 32 by a small axial gap. Migration of the arc onto the track 32 then causes the current to flow in the coil 18 and support arms 34, with formation of a magnetic field causing high-speed rotation of the arc around the track 32. There is then no current flowing in the contact fingers 42.
The temperature rise of the arc causes a pressure increase of the SF6 gas inside the enclosure 12, followed by a gas flow via the tube 20 to the expansion volume of the tank (not represented). Extinction of the arc takes place as soon as the arc is sufficiently cooled by the gas flow (figure 2).
The combined operation of the stationary contact device 16 as main contact and arcing contact, within the internal dimensions of the coil 18, enables a very compact extinguishing chamber to be obtained at a low manufacturing cost.
"Comprises/ccmprising" when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
Claims (9)
1. An extinguishing chamber extinguishing chamber for a high voltage circuit breaker isolated by a high dielectric strength gas, and equipped with an arc extinguishing device by self-expansion of the gas, said chamber including: an enclosure made of insulating material containing a stationary contact device operating in conjunction with a movable contact arranged at the end of a conducting tube, which passes with sliding through one of the panels of the enclosure moving between a closed position and an open position of the contacts, an electromagnetic coil for rotation of the arc on the contact track situated on the front face of the coil, said coil being securedly affixed to the stationary 00 contact device to form an overhanging module on the opposite panel of the enclosure. means for the chamber to communicate with the external volume of the enclosure when self-expansion of the gas takes place after the contacts have separated, the stationary contact device being coaxially surrounded by the cylindrical Ole% coil, and comprising a plurality of contact fingers arranged circumferentially to confine a hollow space receiving the movable contact. characterized in that each contact finger of the stationary contact device includes a composite metallic structure having: a copper main body shaped as a cylindrical sector for flow of the permanent current in the closed position of the movable contact, an electrode made of refractory conducting material, brazed onto the front end of the body to constitute a stationary arcing contact arranged near to the arc rotation track, and a segment made of ferromagnetic material brazed onto the periphery of the electrode and of a part of the body, said segment being located inside the coil to obtaining optimum guiding of the arc on the track. 8
2. An extinguishing chamber as claimed in claim 1, wherein the electrode is made of a cupro-tungsten alloy base.
3. An extinguishing chamber as claimed in claim 1 or 2, wherein the segment is made of steel.
4. An extinguishing chamber as claimed in claim 1, 2 or 3, wherein the electrode and the segment of each contact finger are separated from the contact track by an axial gap of small thickness, enabling switching of the arc for excitation of the coil when the movable contact separates from the electrode.
5. An extinguishing chamber as claimed in any one of claims 1 to 4, wherein 99 ••o 9 each contact finger is provided with a rear edge mounted with latching on a °o centring part of a current conducting stud. ooooo
6. An extinguishing chamber as claimed in claim 5, wherein the coil is connected to the stud by copper support arms forming spacers separated from the contact fingers by insulating pads. S
7. An extinguishing chamber as claimed in claim 6, characterized in that a spring in the form of a curved blade is inserted between each insulating pad and the corresponding contact finger.
8. An extinguishing chamber as claimed in any of claims 1 to 7, wherein the coil is formed by axial stacking of conducting turns insulated from one another by insulating intercalated parts, and that the rear face of the coil opposite that track is equipped with steel washers, the assembly being secured by fixing screws.
9. An extinguishing chamber as claimed in any one of claims 1 to 8, wherein the communication means are formed by the hollow tube of the movable contact. 9 An extinguishing chamber substantially as herein described with reference to the at least one of the accompanying drawings. DATED this 18 th day of May 2001 SCHNEIDER ELECTRIC SA WATERMARK PATENT TRADEMARK ATTORNEYS 290 BURWOOD ROAD HAWTHORN VICTORIA 3122 AUSTRALIA RCS/AJL/TJ i 9 S
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9801103A FR2774212B1 (en) | 1998-01-27 | 1998-01-27 | CUTTING CHAMBER FOR A SELF-EXPANSION AND CIRCUIT BREAKER |
| FR98/01103 | 1998-01-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU1323099A AU1323099A (en) | 1999-08-19 |
| AU735933B2 true AU735933B2 (en) | 2001-07-19 |
Family
ID=9522422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU13230/99A Ceased AU735933B2 (en) | 1998-01-27 | 1999-01-25 | An extinguishing chamber for a circuit breaker with self-extinguishing expansion and rotating arc |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0932176B1 (en) |
| JP (1) | JP4434348B2 (en) |
| CN (1) | CN1094640C (en) |
| AU (1) | AU735933B2 (en) |
| BR (1) | BR9900176B1 (en) |
| DE (1) | DE69833638T2 (en) |
| EA (1) | EA001575B1 (en) |
| ES (1) | ES2259202T3 (en) |
| FR (1) | FR2774212B1 (en) |
| ID (1) | ID21803A (en) |
| NO (1) | NO317117B1 (en) |
| TW (1) | TW418415B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10131018C1 (en) * | 2001-06-27 | 2003-01-23 | Siemens Ag | Power switch for medium voltage network plane, has opening in switch chamber allowing gas to flow into auto-compression gas space during opening of switch contacts |
| RU2207647C1 (en) * | 2001-12-14 | 2003-06-27 | Государственный научный центр Российской Федерации Троицкий институт инновационных и термоядерных исследований | Switching device |
| DE502007003782D1 (en) * | 2007-11-02 | 2010-06-24 | Abb Research Ltd | High voltage circuit breaker with rotating arc |
| CN101465234B (en) * | 2009-01-12 | 2011-08-03 | 上海华通开关厂有限公司 | Device for transmitting current of isolation switch switching bus bar |
| EP2579287B1 (en) | 2010-05-31 | 2014-07-02 | Ormazabal Y Cia., S.L.U. | Gas circuit breaker |
| EP2434514A1 (en) * | 2010-09-24 | 2012-03-28 | ABB Technology AG | Vacuum interrupter for a circuit breaker arrangement |
| ITMI20120406A1 (en) * | 2012-03-15 | 2013-09-16 | Cembre Spa | PERMANENT ELECTRICAL CONTACT THAT CAN BE APPLIED ON THE SOUND OF RAILS AND THE LIKE |
| CN105428138A (en) * | 2015-11-20 | 2016-03-23 | 河南平芝高压开关有限公司 | High-voltage isolation switch |
| CN108922821B (en) * | 2018-06-14 | 2020-03-06 | 平高集团有限公司 | Arc extinguishing chamber, arc extinguishing chamber contact and arc suppression coil's insulating support |
| CN108735545B (en) * | 2018-06-14 | 2020-04-10 | 平高集团有限公司 | Arc suppression coil's insulating support, explosion chamber contact and explosion chamber |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4431886A (en) * | 1981-08-12 | 1984-02-14 | Northern Engineering Industries Plc | Circuit-breaker |
| EP0768692A1 (en) * | 1995-10-16 | 1997-04-16 | Schneider Electric Sa | Autoexpansion circuit breaker with insulating gas |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249052A (en) * | 1978-05-01 | 1981-02-03 | Electric Power Research Institute, Inc. | Arc spinner interrupter with chromium copper arcing contact |
| DE3833564A1 (en) * | 1987-11-24 | 1989-06-08 | Bbc Brown Boveri & Cie | Gas-blast circuit breaker |
-
1998
- 1998-01-27 FR FR9801103A patent/FR2774212B1/en not_active Expired - Fee Related
- 1998-12-15 DE DE69833638T patent/DE69833638T2/en not_active Expired - Lifetime
- 1998-12-15 EP EP19980410148 patent/EP0932176B1/en not_active Expired - Lifetime
- 1998-12-15 ES ES98410148T patent/ES2259202T3/en not_active Expired - Lifetime
- 1998-12-28 TW TW87121770A patent/TW418415B/en not_active IP Right Cessation
-
1999
- 1999-01-07 ID IDP990009A patent/ID21803A/en unknown
- 1999-01-25 AU AU13230/99A patent/AU735933B2/en not_active Ceased
- 1999-01-25 CN CN 99101371 patent/CN1094640C/en not_active Expired - Fee Related
- 1999-01-26 EA EA199900061A patent/EA001575B1/en not_active IP Right Cessation
- 1999-01-27 NO NO19990379A patent/NO317117B1/en not_active IP Right Cessation
- 1999-01-27 JP JP01900499A patent/JP4434348B2/en not_active Expired - Fee Related
- 1999-01-27 BR BR9900176A patent/BR9900176B1/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4431886A (en) * | 1981-08-12 | 1984-02-14 | Northern Engineering Industries Plc | Circuit-breaker |
| EP0768692A1 (en) * | 1995-10-16 | 1997-04-16 | Schneider Electric Sa | Autoexpansion circuit breaker with insulating gas |
Also Published As
| Publication number | Publication date |
|---|---|
| EA001575B1 (en) | 2001-06-25 |
| EA199900061A3 (en) | 1999-12-29 |
| EA199900061A2 (en) | 1999-08-26 |
| BR9900176A (en) | 1999-12-28 |
| BR9900176B1 (en) | 2010-11-30 |
| NO990379D0 (en) | 1999-01-27 |
| JPH11265641A (en) | 1999-09-28 |
| CN1224904A (en) | 1999-08-04 |
| AU1323099A (en) | 1999-08-19 |
| DE69833638T2 (en) | 2006-11-09 |
| DE69833638D1 (en) | 2006-04-27 |
| ID21803A (en) | 1999-07-29 |
| JP4434348B2 (en) | 2010-03-17 |
| ES2259202T3 (en) | 2006-09-16 |
| FR2774212B1 (en) | 2000-03-10 |
| EP0932176A1 (en) | 1999-07-28 |
| CN1094640C (en) | 2002-11-20 |
| NO317117B1 (en) | 2004-08-16 |
| FR2774212A1 (en) | 1999-07-30 |
| TW418415B (en) | 2001-01-11 |
| EP0932176B1 (en) | 2006-03-01 |
| NO990379L (en) | 1999-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) |