CA2031481C - Gas-insulated three-pole high-voltage switch - Google Patents
Gas-insulated three-pole high-voltage switch Download PDFInfo
- Publication number
- CA2031481C CA2031481C CA002031481A CA2031481A CA2031481C CA 2031481 C CA2031481 C CA 2031481C CA 002031481 A CA002031481 A CA 002031481A CA 2031481 A CA2031481 A CA 2031481A CA 2031481 C CA2031481 C CA 2031481C
- Authority
- CA
- Canada
- Prior art keywords
- pole
- enclosure
- gas
- voltage switch
- chamber
- 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 - Fee Related
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
- H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
- H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
- H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
-
- 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
- H01H33/022—Details particular to three-phase circuit breakers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0352—Gas-insulated switchgear for three phase switchgear
Abstract
A high-voltage switch 10, with a sealed metal enclosure 12 is filled with SF6, and houses three pole-units 14, 16, 18 actuated by an operating bar 78. Each pole-unit comprises a pair of stationary contacts 36 and movable contacts 54, a compression gas-blast device 64, the assembly being capped by an insulating revolution chamber 58. The latter comprises a bearing 66 guiding the sliding rod 55 in translation, and a fixed cylinder 62 cooperating with the piston 68 of the gas-blast device 64. The base of the chamber 58 is fixed by screws to the metal enclosure 12 which plays the role of ground ring for the three pole-units.
Description
~~ ~j :' 11 ~ ~ ~' v a .a .a j ..
GAS-INSULATED THREE-POLE HIGH--VOLTAGE SWITCH
The invention yelates to a high-voltage switch with a sealed enclosure filled with gas with a high dielectric strength, notably sulphur hexafluoride, containing a plurality of identical pole-units, and an operating bar passing through the wall of the enclosure with a flexible seal interposed, each, pole-unit comprising a stationary contact supported by a conducting stud in electrical connection with a first connecting terminal, - a movable contact arranged at the end of a conducting rod animated with a translation movement between the closed position and the open position, said rod being mechanically coupled by its opposite end to a crank of the bar, and electrically connected by a conducting braid to a second connecting terminal, - and a compression gas-blast device having a compressible volume designed to send a jet of compressed gas to the arcing zone when the rod moves to the span position.
In the document FR-A 2,242,794, the enclosure is made of insulating material, and a flash-over bar is located facing the different pale-units inside the enclosure. In the open position of the contacts, the flash-over distance between the movable contacts of the different pole-units and the flash-over bar is less than that of the separated contacts in order to prevent any flash-over between the latter.
According to another state-of-the-art switch, superficial damage to the insulator can generate a leakage current between the contacts which are in the open position. In the absence of grounding, one of the connecting terminals of a pole-unit is liable to go to a dangerous potential. This results in the disconnecting function of the switch no longer being performed.
The object of the invention consists in improving the safety of a gas-insulated high-voltage switch.
According to the present invention, there is provided a high-voltage switch with a sealed enclosure filled with gas with a high dielectric strength, notably sulphur hexafluoride, containing a plurality of identical pole-units, and an operating bar passing through a wall of the enclosure with a flexible seal interposed, the pole units being actuated by said bar between a closed position and an open position, each pole-unit comprising:
- a stationary contact supported by a conducting stud in electrical connection with a first connecting terminal;
- a movable contact arranged at an end of a conducting rod animated with a translation movement between the closed position and the open position, said rod having opposite ends mechanically coupled to a crank of the bar, and being electrically connected by a conducting braid to a second connecting terminal;
- an expansion volume arranged inside the enclosure; and - a compression gas-blast device, having a compressible volume designed to send a jet of compressed gas to an arcing zone when the rod moves to the open position, wherein the enclosure is at earth potential and has orifices for insulating bushings of the first and second terminals, each pole-unit comprises an insulating revolution chamber capping the gas-blast device, and the stationary and movable contacts, the chamber having an 2a end arranged as a bearing guiding the rod in translation, and an other end fixed to an internal wall of the enclosure, which plays a role of ground ring, and an annular gap is arranged between the chamber and the bushing of the first terminal.
To sum up, the present invention and its preferred embodiments disclose the following non-restrictive features.
The switch according to the invention is characterized in that the metal enclosure is at earth potential and has orifices for insulating bushings of first and second terminals, that each pole-unit comprises an insulating revolution chamber capping the gas-blast device, and the stationary and movable contacts, one of the ends of the chamber being arranged as a bearing guiding the rod in translation, and the other end being fixed to the internal wall of the enclosure, which plays the role of ground ring, and that an annular gap is arranged between the chamber and the bushing of the corresponding first terminal.
Such an arrangement suppresses any direct flash-over between the open contacts. The common enclosure of the pole-units plays the role of ground ring, which avoids an auxiliary flash-over bar being incorporated. The disconnecting function of the switch is then performed, allowing a direct contact without any danger with the insulating bushing of the first connecting terminal of each pole-unit.
The insulating chamber comprises a first cylinder-shaped part inside which a piston of the gas-blast device slides, the piston being securedly united to the movable rod, and bearing a blast nozzle communicating with the compressible volume by communicating orifices.
2b The chamber is equipped with a second bell-shaped part adjacent to the cylinder, the lateral surface of the bell having a communication aperture between the~arcing zone of each pole-unit, and the expansion volume of the enclosure.
Lh ~.) Other advantages and features will become mare clearly apparent from the following description of an illustrative embodiment of the invention, given as a non-restrictive example only and .represented in the accompanying drawings, in which - Figure 1 is a plane view, partially in cross-section of a three-pole switch according to the invention, the cover of the enclosure being removed;
- Figure 2 shows a cross-sectional view along the line 2-2 of figure l, in the closed position of the switch, - Figure 3 is an identical view to figure 2, in the open position of the switch.
In the figures, a three-pole high-voltage switch 10 is housed inside a sealed metal enclosure 12, filled with insulating gas with a high dielectric strength, notably sulphur hexafluoride.
The enclosure 12 comprises a parallelipipedic-shaped housing made of molded aluminum alloy, and containing three identical pole-units 14, 16, 18, extending parallel to one another in a horizontal plane.
Electrical cormection of the switch 10 is achieved by means of a first series of terminals 20, 22, 24, and a second series of terminals 26, 28, 30 passing respectively through two apposite side faces 32, 34 of. the enclosure 12.
Each pole-unit 14, 16, 18 comprises a stationary tulip-finger contact 36 supported by a conducting stud 38 securedly united to an i~isert 40 of the corresponding terminal 20, 22, 24 of the first series. The insert 40 is covered by the insulating bushing 42, which comprises an internal support base 43 and an external threaded sleeve 44 designed to receive a fixing nut 46.
-i ~ ~i e~ .~~. '~- l;~ .a The bushing 42 of all 'the terminals 20 to 30 is fitted in a conjugate orifice 48 of the enclosure 12, with a seal 50 fitted between the support base 43 and the internal wall of the face 32.
The contact stud 38 of each pole-unit also supports a metal deflector 52 coaxially surrounding the stationary contact 36 to obtain a regular distribution of the electrical field in the contact separation zone.
Each stationary contact 36 cooperates with a movable contact 54 disposed at one of the ends of a conducting rod 55. The opposite end of this rod 55 is connected by a braided connecting strip 56 to the corresponding terminal 26, 28, 30 of the second series.
A fixed revolution chamber 58 is disposed coaxially around the deflector 52 and the sliding rod 55 of each pole-unit 14, 16, 18. The chamber 58 made of insulating material comprises a part shaped as an open-ended bell 60 fixed to the enclosure 12, a cylinder 62 forming part of a compression gas-blast device 64, and a bearing 66 guiding the rod 55 in translation. The cylinder 62 cooperates with a piston 68 secured to the sliding rod 55, so as to bring about compression of the SF6 gas in a compressible volume 70 in the course of the sliding movement of the rod 55.
The movable piston 68 supports a blast nozzle 72 communicating by orifices 74 with the compressible volume 70, allowing the compressed gas to be ejected to the arcing zone 76 after the contacts 36, 54 have separated.
The bell 60 of the chambers 58 comprises at least an aperture 77 for the arcing zone 76 of each pole-unit to communicate with the internal volume of the enclosure 12.
A bar 78 made of insulating material is mounted with limited rotation inside the enclosure 12, being coupled to a shaft 80 of ~1 Ci ..;~ "A' ~! 4~1 the operating mechanism (not represented). The sealing where the shaft 80 passes through the enclosure 12 is achieved by means of a flexible seal 82. The bar 78 extends perpendicularly to 'the three pole--units 14, 16, 18, and comprises three cranks 84, 86, 88 mechanically connected to the sliding rods 55, so as to transform the rotation movement of the bar 78 into a translation movement of each movable contact 54. Each crank 84, 86, 88 comprises a coupling spindle 90 engaged in an oblong slot 92 of a transmission part in the form of a fork 94 securedly united to the corresponding rod 55.
The base of each bell 60 is equipped with flanges 96 with screws 98 to fix the corresponding chamber 58 to the internal wall of the face 32. Tn each chamber 58, an annular gap 100 is arranged between the bell 60 and the base 43 of the insulating bushing 42.
The insulating chamber 58 and bushings 42 are in direct connection with the metal enclosure 12.
Operation of a pole-unit of the high-voltage switch 10 according to the invention is as follows The enclosure 12 contains SF6 at atmospheric pressure, or close thereto.
Switching from the closed position (fig. 2) to the open position (fig. 3) is achieved by a limited clockwise rotation of the bar 78 (arrow F1 in fig. 2). ,axial guiding of the rod 55 in translation is performed by the bearing 66 of the insulating chamber 58. At the beginning of opening travel, a precompression of the gas is generated in the compressible volume 70 until the moment the contacts 36, S4 separate. Continued translation movement of the rod 55 causes the arc to be extinguished in a well-known manner by ejection of the compressed gas through the ' ~ t,a 'f ~c1 '~~ Ld .:l ti ~3 ..~.
orifices 74 and nozzle 72 to the arcing zone 76.
In the open position of the pole-unit (fig. 3), an insulation distance of approximately sixty millimeters separates the stationary contact 36 and the movable contact 54. In the event of superficial damage to the insulator of the chamber 58, a leakage current is liable to run along the chamber 58 between the conducting rod 55 and the metal enclosure 12, which is at earth potential. Such a leakage current on the running path is of no immediate danger. It can generate a flash-over to the ground, which can easily be detected by a ground fault toroid differential protection device.
The metal enclosure 12 thus plays the role of ground ring for all three pole-units 14, 16, 18. The presence of the radial gap 100 between each bushing 42 and the corresponding chamber 58 prevents any direct flash-over between the stationary contact 36 and movable contact 54. The insulating bushings 42 of the terminals 20, 22, 24, are at ground potential and can be touched without danger when the contacts 36, 54 are open (fig. 3), 'thus contributing to the disconnecting funcaion of the switch 10.
According to an alternative embodiment, the pole-units 14, 16, 18 of the three-pole switch 10 can be disposed at the edges of a straight prism, inside the metal enclosure 12.
GAS-INSULATED THREE-POLE HIGH--VOLTAGE SWITCH
The invention yelates to a high-voltage switch with a sealed enclosure filled with gas with a high dielectric strength, notably sulphur hexafluoride, containing a plurality of identical pole-units, and an operating bar passing through the wall of the enclosure with a flexible seal interposed, each, pole-unit comprising a stationary contact supported by a conducting stud in electrical connection with a first connecting terminal, - a movable contact arranged at the end of a conducting rod animated with a translation movement between the closed position and the open position, said rod being mechanically coupled by its opposite end to a crank of the bar, and electrically connected by a conducting braid to a second connecting terminal, - and a compression gas-blast device having a compressible volume designed to send a jet of compressed gas to the arcing zone when the rod moves to the span position.
In the document FR-A 2,242,794, the enclosure is made of insulating material, and a flash-over bar is located facing the different pale-units inside the enclosure. In the open position of the contacts, the flash-over distance between the movable contacts of the different pole-units and the flash-over bar is less than that of the separated contacts in order to prevent any flash-over between the latter.
According to another state-of-the-art switch, superficial damage to the insulator can generate a leakage current between the contacts which are in the open position. In the absence of grounding, one of the connecting terminals of a pole-unit is liable to go to a dangerous potential. This results in the disconnecting function of the switch no longer being performed.
The object of the invention consists in improving the safety of a gas-insulated high-voltage switch.
According to the present invention, there is provided a high-voltage switch with a sealed enclosure filled with gas with a high dielectric strength, notably sulphur hexafluoride, containing a plurality of identical pole-units, and an operating bar passing through a wall of the enclosure with a flexible seal interposed, the pole units being actuated by said bar between a closed position and an open position, each pole-unit comprising:
- a stationary contact supported by a conducting stud in electrical connection with a first connecting terminal;
- a movable contact arranged at an end of a conducting rod animated with a translation movement between the closed position and the open position, said rod having opposite ends mechanically coupled to a crank of the bar, and being electrically connected by a conducting braid to a second connecting terminal;
- an expansion volume arranged inside the enclosure; and - a compression gas-blast device, having a compressible volume designed to send a jet of compressed gas to an arcing zone when the rod moves to the open position, wherein the enclosure is at earth potential and has orifices for insulating bushings of the first and second terminals, each pole-unit comprises an insulating revolution chamber capping the gas-blast device, and the stationary and movable contacts, the chamber having an 2a end arranged as a bearing guiding the rod in translation, and an other end fixed to an internal wall of the enclosure, which plays a role of ground ring, and an annular gap is arranged between the chamber and the bushing of the first terminal.
To sum up, the present invention and its preferred embodiments disclose the following non-restrictive features.
The switch according to the invention is characterized in that the metal enclosure is at earth potential and has orifices for insulating bushings of first and second terminals, that each pole-unit comprises an insulating revolution chamber capping the gas-blast device, and the stationary and movable contacts, one of the ends of the chamber being arranged as a bearing guiding the rod in translation, and the other end being fixed to the internal wall of the enclosure, which plays the role of ground ring, and that an annular gap is arranged between the chamber and the bushing of the corresponding first terminal.
Such an arrangement suppresses any direct flash-over between the open contacts. The common enclosure of the pole-units plays the role of ground ring, which avoids an auxiliary flash-over bar being incorporated. The disconnecting function of the switch is then performed, allowing a direct contact without any danger with the insulating bushing of the first connecting terminal of each pole-unit.
The insulating chamber comprises a first cylinder-shaped part inside which a piston of the gas-blast device slides, the piston being securedly united to the movable rod, and bearing a blast nozzle communicating with the compressible volume by communicating orifices.
2b The chamber is equipped with a second bell-shaped part adjacent to the cylinder, the lateral surface of the bell having a communication aperture between the~arcing zone of each pole-unit, and the expansion volume of the enclosure.
Lh ~.) Other advantages and features will become mare clearly apparent from the following description of an illustrative embodiment of the invention, given as a non-restrictive example only and .represented in the accompanying drawings, in which - Figure 1 is a plane view, partially in cross-section of a three-pole switch according to the invention, the cover of the enclosure being removed;
- Figure 2 shows a cross-sectional view along the line 2-2 of figure l, in the closed position of the switch, - Figure 3 is an identical view to figure 2, in the open position of the switch.
In the figures, a three-pole high-voltage switch 10 is housed inside a sealed metal enclosure 12, filled with insulating gas with a high dielectric strength, notably sulphur hexafluoride.
The enclosure 12 comprises a parallelipipedic-shaped housing made of molded aluminum alloy, and containing three identical pole-units 14, 16, 18, extending parallel to one another in a horizontal plane.
Electrical cormection of the switch 10 is achieved by means of a first series of terminals 20, 22, 24, and a second series of terminals 26, 28, 30 passing respectively through two apposite side faces 32, 34 of. the enclosure 12.
Each pole-unit 14, 16, 18 comprises a stationary tulip-finger contact 36 supported by a conducting stud 38 securedly united to an i~isert 40 of the corresponding terminal 20, 22, 24 of the first series. The insert 40 is covered by the insulating bushing 42, which comprises an internal support base 43 and an external threaded sleeve 44 designed to receive a fixing nut 46.
-i ~ ~i e~ .~~. '~- l;~ .a The bushing 42 of all 'the terminals 20 to 30 is fitted in a conjugate orifice 48 of the enclosure 12, with a seal 50 fitted between the support base 43 and the internal wall of the face 32.
The contact stud 38 of each pole-unit also supports a metal deflector 52 coaxially surrounding the stationary contact 36 to obtain a regular distribution of the electrical field in the contact separation zone.
Each stationary contact 36 cooperates with a movable contact 54 disposed at one of the ends of a conducting rod 55. The opposite end of this rod 55 is connected by a braided connecting strip 56 to the corresponding terminal 26, 28, 30 of the second series.
A fixed revolution chamber 58 is disposed coaxially around the deflector 52 and the sliding rod 55 of each pole-unit 14, 16, 18. The chamber 58 made of insulating material comprises a part shaped as an open-ended bell 60 fixed to the enclosure 12, a cylinder 62 forming part of a compression gas-blast device 64, and a bearing 66 guiding the rod 55 in translation. The cylinder 62 cooperates with a piston 68 secured to the sliding rod 55, so as to bring about compression of the SF6 gas in a compressible volume 70 in the course of the sliding movement of the rod 55.
The movable piston 68 supports a blast nozzle 72 communicating by orifices 74 with the compressible volume 70, allowing the compressed gas to be ejected to the arcing zone 76 after the contacts 36, 54 have separated.
The bell 60 of the chambers 58 comprises at least an aperture 77 for the arcing zone 76 of each pole-unit to communicate with the internal volume of the enclosure 12.
A bar 78 made of insulating material is mounted with limited rotation inside the enclosure 12, being coupled to a shaft 80 of ~1 Ci ..;~ "A' ~! 4~1 the operating mechanism (not represented). The sealing where the shaft 80 passes through the enclosure 12 is achieved by means of a flexible seal 82. The bar 78 extends perpendicularly to 'the three pole--units 14, 16, 18, and comprises three cranks 84, 86, 88 mechanically connected to the sliding rods 55, so as to transform the rotation movement of the bar 78 into a translation movement of each movable contact 54. Each crank 84, 86, 88 comprises a coupling spindle 90 engaged in an oblong slot 92 of a transmission part in the form of a fork 94 securedly united to the corresponding rod 55.
The base of each bell 60 is equipped with flanges 96 with screws 98 to fix the corresponding chamber 58 to the internal wall of the face 32. Tn each chamber 58, an annular gap 100 is arranged between the bell 60 and the base 43 of the insulating bushing 42.
The insulating chamber 58 and bushings 42 are in direct connection with the metal enclosure 12.
Operation of a pole-unit of the high-voltage switch 10 according to the invention is as follows The enclosure 12 contains SF6 at atmospheric pressure, or close thereto.
Switching from the closed position (fig. 2) to the open position (fig. 3) is achieved by a limited clockwise rotation of the bar 78 (arrow F1 in fig. 2). ,axial guiding of the rod 55 in translation is performed by the bearing 66 of the insulating chamber 58. At the beginning of opening travel, a precompression of the gas is generated in the compressible volume 70 until the moment the contacts 36, S4 separate. Continued translation movement of the rod 55 causes the arc to be extinguished in a well-known manner by ejection of the compressed gas through the ' ~ t,a 'f ~c1 '~~ Ld .:l ti ~3 ..~.
orifices 74 and nozzle 72 to the arcing zone 76.
In the open position of the pole-unit (fig. 3), an insulation distance of approximately sixty millimeters separates the stationary contact 36 and the movable contact 54. In the event of superficial damage to the insulator of the chamber 58, a leakage current is liable to run along the chamber 58 between the conducting rod 55 and the metal enclosure 12, which is at earth potential. Such a leakage current on the running path is of no immediate danger. It can generate a flash-over to the ground, which can easily be detected by a ground fault toroid differential protection device.
The metal enclosure 12 thus plays the role of ground ring for all three pole-units 14, 16, 18. The presence of the radial gap 100 between each bushing 42 and the corresponding chamber 58 prevents any direct flash-over between the stationary contact 36 and movable contact 54. The insulating bushings 42 of the terminals 20, 22, 24, are at ground potential and can be touched without danger when the contacts 36, 54 are open (fig. 3), 'thus contributing to the disconnecting funcaion of the switch 10.
According to an alternative embodiment, the pole-units 14, 16, 18 of the three-pole switch 10 can be disposed at the edges of a straight prism, inside the metal enclosure 12.
Claims (6)
1. A high-voltage switch with a sealed enclosure filled with gas with a high dielectric strength, notably sulphur hexafluoride, containing a plurality of identical pole-units, and an operating bar passing through a wall of the enclosure with a flexible seal interposed, the pole units being actuated by said bar between a closed position and an open position, each pole-unit comprising:
- a stationary contact supported by a conducting stud in electrical connection with a first connecting terminal;
- a movable contact arranged at an end of a conducting rod animated with a translation movement between the closed position and the open position, said rod having opposite ends mechanically coupled to a crank of the bar, and being electrically connected by a conducting braid to a second connecting terminal;
- an expansion volume arranged inside the enclosure; and - a compression gas-blast device, having a compressible volume designed to send a jet of compressed gas to an arcing zone when the rod moves to the open position, wherein the enclosure is at earth potential and has orifices for insulating bushings of the first and second terminals, each pole-unit comprises an insulating revolution chamber capping the gas-blast device, and the stationary and movable contacts, the chamber having an end arranged as a bearing guiding the rod in translation, and an other end fixed to an internal wall of the enclosure, which plays a role of ground ring, and an annular gap is arranged between the chamber and the bushing of the first terminal.
- a stationary contact supported by a conducting stud in electrical connection with a first connecting terminal;
- a movable contact arranged at an end of a conducting rod animated with a translation movement between the closed position and the open position, said rod having opposite ends mechanically coupled to a crank of the bar, and being electrically connected by a conducting braid to a second connecting terminal;
- an expansion volume arranged inside the enclosure; and - a compression gas-blast device, having a compressible volume designed to send a jet of compressed gas to an arcing zone when the rod moves to the open position, wherein the enclosure is at earth potential and has orifices for insulating bushings of the first and second terminals, each pole-unit comprises an insulating revolution chamber capping the gas-blast device, and the stationary and movable contacts, the chamber having an end arranged as a bearing guiding the rod in translation, and an other end fixed to an internal wall of the enclosure, which plays a role of ground ring, and an annular gap is arranged between the chamber and the bushing of the first terminal.
2. The high-voltage switch according to claim 1, wherein the insulating revolution chamber comprises a cylindrical-shaped part inside which a piston of the gas-blast device slides, the piston being securedly united to the rod, and bearing a blast nozzle communicating with the compressible volume by communication orifices.
3. The high-voltage switch according to claim 2, wherein the chamber is equiipped with a bell-shaped part adjacent to the cylindrical-shaped part, a lateral surface of the bell-shaped part having a communication aperture between the arcing zone of each pole-unit, and the expansion volume of the enclosure.
4. The high-voltage switch according to claim 2 or 3, wherein the bushing of the first terminal of each pole-unit comprises an internal base bearing on the wall of the enclosure with a seal interposed, and an external threaded sleeve cooperating with a fixing nut.
5. The high-voltage switch according to claim 4, wherein the stationary contact is a tulip-finger contact, the stud of each pole-unit bears a metal electrical field distribution deflector around the stationary tulip-finger contact, and the nozzle protrudes out from the movable contact, and surrounds the stationary contact with a small radial clearance in the closed position of the switch.
6. The high-voltage switch according to claim 1, wherein the enclosure is in metal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8916592A FR2655768B1 (en) | 1989-12-13 | 1989-12-13 | HIGH VOLTAGE TRIPOLAR GAS INSULATED SWITCH. |
| FR8916592 | 1989-12-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2031481A1 CA2031481A1 (en) | 1991-06-14 |
| CA2031481C true CA2031481C (en) | 2000-08-29 |
Family
ID=9388532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002031481A Expired - Fee Related CA2031481C (en) | 1989-12-13 | 1990-12-04 | Gas-insulated three-pole high-voltage switch |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0433183B1 (en) |
| CA (1) | CA2031481C (en) |
| DE (1) | DE69013304T2 (en) |
| ES (1) | ES2064698T3 (en) |
| FI (1) | FI97753C (en) |
| FR (1) | FR2655768B1 (en) |
| ID (1) | ID901B (en) |
| NO (1) | NO179308C (en) |
| PT (1) | PT96170B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0517295B1 (en) * | 1991-05-24 | 1997-12-17 | Giampietro Tosi | Medium voltage switch with three positions insulated in sulphur hexafluoride |
| FR2694986B1 (en) * | 1992-07-30 | 1996-08-30 | Soule Sa | IMPROVEMENTS IN ELECTRICAL LINE BREAKING DEVICES. |
| DE4422079A1 (en) * | 1994-06-24 | 1996-01-04 | Abb Patent Gmbh | Encapsulated high-voltage switch in gas-insulated switchgear |
| DE4445865A1 (en) * | 1994-12-22 | 1996-06-27 | Abb Patent Gmbh | Electrical metal-enclosed gas-insulated high-voltage switchgear |
| DE19816366C1 (en) * | 1998-04-03 | 1999-11-11 | Siemens Ag | Encapsulation module with a three-phase switching device for a gas-insulated high-voltage switchgear |
| JP5433360B2 (en) * | 2009-09-18 | 2014-03-05 | 株式会社東芝 | Gas insulated switchgear |
| DE202011106188U1 (en) * | 2011-09-30 | 2013-01-09 | Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co | Schalterpoleinheit |
| DE102020203029A1 (en) * | 2020-03-10 | 2021-09-16 | Siemens Aktiengesellschaft | Electrical circuit arrangement |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2242794B1 (en) * | 1973-08-30 | 1976-11-19 | Merlin Gerin | |
| FR2271685A1 (en) * | 1974-05-16 | 1975-12-12 | Alsthom Cgee | High-voltage terminal unit - has combination of dielectric gas-filled breakers and accessible connections |
| FR2305871A1 (en) * | 1975-03-25 | 1976-10-22 | Alsthom Cgee | High voltage circuit breaker cell - consists of single cell which provides operator protection, using fixed and moving electrodes in bell shaped enclosures |
| FR2507835A1 (en) * | 1981-06-16 | 1982-12-17 | Merlin Gerin | GAS INSULATED SHIELDED CELL FOR MEDIUM VOLTAGE POWER STATION |
-
1989
- 1989-12-13 FR FR8916592A patent/FR2655768B1/en not_active Expired - Fee Related
-
1990
- 1990-11-20 DE DE69013304T patent/DE69013304T2/en not_active Expired - Fee Related
- 1990-11-20 EP EP90420497A patent/EP0433183B1/en not_active Expired - Lifetime
- 1990-11-20 ES ES90420497T patent/ES2064698T3/en not_active Expired - Lifetime
- 1990-12-04 CA CA002031481A patent/CA2031481C/en not_active Expired - Fee Related
- 1990-12-12 FI FI906122A patent/FI97753C/en not_active IP Right Cessation
- 1990-12-12 NO NO905380A patent/NO179308C/en unknown
- 1990-12-12 PT PT96170A patent/PT96170B/en not_active IP Right Cessation
-
1992
- 1992-01-31 ID IDP214192A patent/ID901B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO905380D0 (en) | 1990-12-12 |
| ES2064698T3 (en) | 1995-02-01 |
| PT96170B (en) | 1998-07-31 |
| FI97753C (en) | 1997-02-10 |
| PT96170A (en) | 1992-09-30 |
| ID901B (en) | 1996-09-09 |
| FI97753B (en) | 1996-10-31 |
| DE69013304T2 (en) | 1995-05-04 |
| FR2655768B1 (en) | 1993-10-08 |
| EP0433183B1 (en) | 1994-10-12 |
| FI906122A0 (en) | 1990-12-12 |
| CA2031481A1 (en) | 1991-06-14 |
| FR2655768A1 (en) | 1991-06-14 |
| EP0433183A1 (en) | 1991-06-19 |
| FI906122A (en) | 1991-06-14 |
| DE69013304D1 (en) | 1994-11-17 |
| NO905380L (en) | 1991-06-14 |
| NO179308B (en) | 1996-06-03 |
| NO179308C (en) | 1996-09-11 |
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| EEER | Examination request | ||
| MKLA | Lapsed |