CA1140191A - Gas-blast switch comprising gas heating means - Google Patents
Gas-blast switch comprising gas heating meansInfo
- Publication number
- CA1140191A CA1140191A CA000357390A CA357390A CA1140191A CA 1140191 A CA1140191 A CA 1140191A CA 000357390 A CA000357390 A CA 000357390A CA 357390 A CA357390 A CA 357390A CA 1140191 A CA1140191 A CA 1140191A
- Authority
- CA
- Canada
- Prior art keywords
- gas
- switching chamber
- support insulator
- support
- blast switch
- 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
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
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
- H01H33/56—Gas reservoirs
- H01H33/562—Means for avoiding liquefaction or for disposing of liquefaction products
Abstract
INVENTORS: GUIDO HUX and HUBERT HALLIMANN
INVENTION: GAS-BLAST SWITCH
ABSTRACT OF THE DISCLOSURE
A substantially tubular-shaped support insulator, which is supported upon a support or carrier housing, supports at least one switching chamber or compartment within which there are arranged contacts which can be brought into and out of engagement with one another. The switching chamber and the internal spaces of the support housing and the support insulator are encapsulated towards the outside, but however are in flow communication with one another and contain a compressed extin-guishing gas. To prevent condensation of the extinguishing gas there is provided an extinguishing gas-heating device which is operatively connected by means of the support insulator with the switching chamber. In order to retard as little as possible the circulation of the extinguishing gas, caused by the heating device, within the gas-blast switch even with appreciable structural heights of the support insulator, there extends from the switching chamber a connection line which is arranged adjacent the support insulator and which leads to the heating device.
INVENTION: GAS-BLAST SWITCH
ABSTRACT OF THE DISCLOSURE
A substantially tubular-shaped support insulator, which is supported upon a support or carrier housing, supports at least one switching chamber or compartment within which there are arranged contacts which can be brought into and out of engagement with one another. The switching chamber and the internal spaces of the support housing and the support insulator are encapsulated towards the outside, but however are in flow communication with one another and contain a compressed extin-guishing gas. To prevent condensation of the extinguishing gas there is provided an extinguishing gas-heating device which is operatively connected by means of the support insulator with the switching chamber. In order to retard as little as possible the circulation of the extinguishing gas, caused by the heating device, within the gas-blast switch even with appreciable structural heights of the support insulator, there extends from the switching chamber a connection line which is arranged adjacent the support insulator and which leads to the heating device.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a new and improved construction of a gas-blast switch.
Generally speaking, the gas-blast switch of the pre-sent development is of the type cornprising a substantially tubular-shaped support insulator which is carried ~ysupport housing which is at ground potential and, in turn, carries at least one switching chamber or compartment. The internal spaces of the support housing and the support insulator as well as the switching chamber are encapsulated towards the outside, but flow communicate with one another and contain an extinguishing gas which is under pressure. There is also provided an extin-guishing gas-heating device which is at ground potential and which operatively communicates by means of the support insulator ¦
with the switching chamber.
The heating device which is provided for the extinguish-ing gas ensures that, at low ambient temperatures, there will be prevented condensation of the pressurized extinguishing gas and the therewith associated reduction of its density and dielectric strength.
l l Such type gas-blast switches are known to the art, for instance, from German patent publication No. 2,825,744 and British patent No. 1,229,036. With such gas-blast switches the
The present invention relates to a new and improved construction of a gas-blast switch.
Generally speaking, the gas-blast switch of the pre-sent development is of the type cornprising a substantially tubular-shaped support insulator which is carried ~ysupport housing which is at ground potential and, in turn, carries at least one switching chamber or compartment. The internal spaces of the support housing and the support insulator as well as the switching chamber are encapsulated towards the outside, but flow communicate with one another and contain an extinguishing gas which is under pressure. There is also provided an extin-guishing gas-heating device which is at ground potential and which operatively communicates by means of the support insulator ¦
with the switching chamber.
The heating device which is provided for the extinguish-ing gas ensures that, at low ambient temperatures, there will be prevented condensation of the pressurized extinguishing gas and the therewith associated reduction of its density and dielectric strength.
l l Such type gas-blast switches are known to the art, for instance, from German patent publication No. 2,825,744 and British patent No. 1,229,036. With such gas-blast switches the
- 2 -. ~14~191 extinguishinggas which is heated by the heating device ascends due to the thermosiphon action within a flue or chimney-like type conduit, extending through the support insulator in lengthwise direction, to the switching chamber or compartment.
On the other hand, the cooler or the cooled gas moves out of the switching chamber through the free jacket space between the inner wall of the support insulator and the outer wall of the pipe conduit, back again downwardly into khe heating device.
In the case of gas-blast switches designed for comparatively high rated voltages the support insulators have quite a large structural height or dimension, so that an effective and satisfactorily rapid circulation of the extinguishing gas heated by the heating device requires, without providing any further auxiliary means, sufficient flow cross-sectional area both at the pipe conduit and also at the jacket space or chamber.
This again requires a larger dimension of the diameter of the support insulator than otherwise would be necessary by virtue of its purely mechanical loading.
According to another prior art gas-blast switch of the previously mentioned type, as disclosed in United States patent No. 3,749,869, the switching chamber or compartment is horizontally supported upon two tubular-shaped support insulators The internal space of the first of such support insulators serves only as an exhaust chamber for the switching gas and is only opened by a valve during a cut-off stroke. On the other hand, the internal space of the second support insulator likewise serves for the infeed of the heated and pressurized extinguishing
On the other hand, the cooler or the cooled gas moves out of the switching chamber through the free jacket space between the inner wall of the support insulator and the outer wall of the pipe conduit, back again downwardly into khe heating device.
In the case of gas-blast switches designed for comparatively high rated voltages the support insulators have quite a large structural height or dimension, so that an effective and satisfactorily rapid circulation of the extinguishing gas heated by the heating device requires, without providing any further auxiliary means, sufficient flow cross-sectional area both at the pipe conduit and also at the jacket space or chamber.
This again requires a larger dimension of the diameter of the support insulator than otherwise would be necessary by virtue of its purely mechanical loading.
According to another prior art gas-blast switch of the previously mentioned type, as disclosed in United States patent No. 3,749,869, the switching chamber or compartment is horizontally supported upon two tubular-shaped support insulators The internal space of the first of such support insulators serves only as an exhaust chamber for the switching gas and is only opened by a valve during a cut-off stroke. On the other hand, the internal space of the second support insulator likewise serves for the infeed of the heated and pressurized extinguishing
- 3 -ll . 1~191, 11 gas to the switching chamber and for the return flow of the cooler or cooled extinguishing gas from the switching chamber back to the heating device. Both of the flow paths within the internal space of the second support insulator extend directly adjacent one another and are not separated from one another, for instance by a partition or separation wall By means of a nozzle the heated extinguishing gas which is further compressed by a blower or a compressor, is b]own as a gas jet upwardly and the suction side of the blower or the compressor, as the case may be,scoops-up cooler or cooled extinguishing gas out of the internal space of the second support insulator at a location laterally neighboring the nozzle.
It should be readily apparent that the length of the flow path, with this arrangement, only can be of limited extent Accord-ingly, this arrangement can not be used with high-voltage switches (with support insulators of appreciable height).
SUMMARY ~ T~E INVE~TION
Therefore, with the foregoing in mind it is a primary object of the presen-t invention to provide a new and improved construction of a gas-blast switch which is not associated with the aforementioned drawbacks and limitations of the prior art proposals.
_ 4 _ Another and more specific object of the present invention aims at providing a new and improved construction of gas-blast switch of the previously mentioned type, wherein, without increasing the cross-sectional area of the support insulator, it is possible to obtain through the action of the heating device an adequately rapid circulation ofthe extinguish-ing gas, and wherein the length of the support insulator does not appreciably retard such extinguishing gas circulation.
Now in order to implement these and still further objects of the invention, which will become more readily apparent as the description proceeds, the gas-blast switch of the present development is manifested by the features that there emanates from the switching chamber a connection line, which is arranged adjacent the support insulator, and leads to the heating device.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:
Figure 1 is a longitudinal sectional view through a first embodiment of gas-blast switch according to the invention;
and . _ --4vlal ~
Figure 2 is a longitudinal sectional view through a second embodiment of gas-blast switch according to the invention.
DETAILED DESCRIPTION OF T~IE PREFERRED EMBODIMENTS
Describing now the drawings, it is to be understood .
that throughout the various embodiments of gas-blast switches, shown respectively in Figuxes 1 and 2 there have been conveniently used the same reference characters to denote the same or analogous elements. Turning attention now to the drawings, the illustrated gas-blast switch 10 possesses a support housi.ng 11 which is at ground potential. Sealingly flanged to the support housing 11 is a substantially tubular-shaped, upright support insulator 12, the height of which essentially depends upon the rated voltage and also the site of erection of the gas-blast switch 10.
The support or carrier insulator 12 supports a switching chamber or compartment 13, which here is shown vertically arran-ged. The switching chamber or compartment 13 is surrounded by a substantially tubular-shaped insulator 14 and is sealingly closed at the top thereof by means of a connection or closure flange 15. Between the insulator 14 and the support insulator 12 there is arranged a lower connection flange 16 which is sealingly connected with the support insulator 12.
. ~ . _ _ _ . , . . . . _ 11~0~9~
~ rranged within the switching chamber or compartment 13 is a set of fixed contact elements 17 electrically connected with the upper connection flange 15 and a set of movable contact elements 18 electrically connected with the lower connection flange 16 and with which there is operatively associated, as is well known in this technology, a movable blast nozzle 19 and a pump cylinder 20. At the set of movable contact elements 18 there is coupled athrust and traction rod 21 which extends downwardly out of the switching chamber 13 and its lower end is anchored at a thrust and traction tube 22 formed of a suitable electrically insulating material, which, in turn, is coupled by a further rod 23 and a connecting rod 24 with a crank 25 of a suitable drive which is not here further shown since it is unimportant for comprehending the principles of the invention. A compression or pressure spring 26 which is supported at its upper end at the support housing 11 and at its lower end at the rod 23 serves as a force storage for the cut-off stroke, . I .
~ he switching chamber 13 and the inner spaces, generally indicated by reference character 60 of the support insulator 12 and the support housing 11 are sealingly closed towards the outside, but however are in flow communication with one another and contain a suitable extinguishing gas, typically for instance SF6, which is at a pressure of about 5 to 20 bars As already previously explained, it is important with such gas-blast switches to avoid condensation of the extinguishing gas at lower ¦
ambient temperatures.
- 7 - .
.__ _ . 1~4~
For this purpose there is provided an electrical heating device 27 which is connected with the support housing 11, this heating device 27 therefore likewise being at ground potential. The heating device 27 specifically contains a heating element, for instance an electrical. heating coil 28, which is arran~ed within a lower open pipe or conduit section 29. This pipe or conduit section 29 is coaxially arranged and with radial play within a substantially cup or beaker-shaped housing 30, preferably formed of a thermally poor however electrically adequate conducting material, and is connected at its upper end at a bend or elbow 31 at which there is connected a pipe or conduit 32 which radially leads out of the housing 30. The pipe or conduit 32 leads to a radial bore 33 within the flange 34 of the support housing 11, at which there is sealingly connec-ted the support insulator 12. At its upper end there is connec-ted at the housing 30 a connection conduit or line 35 which is arranged adjacent the support insulator 12 and essentially in parallelism therewith. This connection line 35 establishes , a flow connection or communication between the heating device 27 and the switching chamber 13.
This connection line 35, with the embodiment of Figure 1, contains a first, tubular-shaped insulator 36, a metallic connection collar or sleeve 38 which is attached at the height of the lower connection flange 16 and is secured thereto by means of a strut 37 or equivalent structure, as well as a second tubular-shaped insulator 39 which is arranged . il~
adjacent and parallel to the insulator 14. The upper end of the tubular-shaped insulator 39 is connected with a metallic connection element 42 having cooling ribs 40 and provided with a laterally arranged connection portion or stud 41. The connection stud or portion 41 is sealingly connected in any suitable and therefore not particularly illustrated manner with a radial bore 43 which leads ou-t of the upper connection flange 15. This radial bore 43, in turn, emanates from the upper end of the switching chamber or compartment 13. It is to be observed that within the gas-blast switch 10 -- whether such be in the cut-on position or in the illustrated cut-off position--there prevails essentially the same extinguishing gas pressure, apart from the small pressure gradient which is caused by the heating device 27 when the same is switched-on.
During operation, the heating element or coil 28 heats the extinguishing gas which wipingly contacts the same. This heated extinguishing gas then, in turn, ascends within the pipe or conduit 29 and at the same time draws further extinguish-ing gas out of the connection line or conduit 35, by means of the jacket space or chamber 70 remaining free between the housing 30 and the pipe or conduit 29 and the lower open end of the pipe 29. The heated extinguishing gas arrives by means of the pipe or conduit 32 and the bore 33 at the lower end into the internal space or chamber 60 of the support insulator 12 and ascends theretllrough and through the switching chan~er 13, so that, depe~ding upon the ambient temperature, it more or less _g_ . . .. ~
cools. Now the already somewhat cooled extinguishing gas departs from the switching chamber or compartment 13 by means of the bore 43 and the connection stud or connection portion 41 and arrives at the connec-tion element 42 which is provided with the coolin~ ribs 40, where it experiences a further cooling.
Hence, the gas now descendsfurther into the connection line or conduit 35 towards the heating device 27.
Since in the cut-on position of the gas-blast switch 10 there prevails within the switching chamber or compartment 13 also a certain amount of heat, depending upon the conducted current, the heating coil 28 need not be turned-on all of the time. Therefore it is possible, for instance at the region of the lower end of the connection line or conduit 35g to provide a here merely schematically illustrated temperature sensor or feeler 44 which, for instance, regulates by means of a switch 45 the heating power which is consumed by the heating coil or element 28, for instance selectively turns-on and turns-off the switch 45.
As to the variant embodiment of Figure 2 it is to be understood that the essential differencebetween the embodiment of Figure 1 and that of Figure 2 resides in the fact that the connec-tion line or conduit 35, with the arrangement of Flgure 2, only extends up to the lower connection flange 16 or equivalent structure. Accordingly, the connection line 35 only contains the tubular-shaped insulator 36 upon which i~43191 there is sealingly placed the connection element 42. The connection stud or connection portion 41 of the connection element 42 is connected with a throughpassage or passageway 46 which is formed in the lower connection flange 16. This passageway 46, in turn, emanates from the lower end of the switching chamber or compartment 13.
ll In both embodiments there is realized, even if there is only utilized the thermosiphon action, an effective circulation of the extinguishing gas through the heating device 27.
With the embodiment of Figure 1 the entire gas-blast switch is incorporated into such circulation path. This embodiment is therefore particularly suitable for erection of the gas-blast switchin open surroundings at locations where there are to be expected particularly low ambient temperatures.
The somewhat less complicated construction of gas-blast switch as shown in Figure 2, on the other hand, is more suitable for erection at regions where there are not to be expected such extreme low ambient temperatures.
Of course, the extinguishing gas circulation can be intensified with conventional and therefore not particularly illustrated means, such as pumps or ventilators. This intensified extinguishing gas circulation can be of advantage both when encountering extremely cold weather conditions and also , . . . , . . ~
11~0191 with high current load of the gas-blast switch, wherein in the last-mentioned case the heating coil 28 can be turned-off by the temperature feeler 44 and the switch 45.
While there are shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto, but may be otherwise variously embodied and practiced within the scope of the following claims. ACCORDINGLY, ll
It should be readily apparent that the length of the flow path, with this arrangement, only can be of limited extent Accord-ingly, this arrangement can not be used with high-voltage switches (with support insulators of appreciable height).
SUMMARY ~ T~E INVE~TION
Therefore, with the foregoing in mind it is a primary object of the presen-t invention to provide a new and improved construction of a gas-blast switch which is not associated with the aforementioned drawbacks and limitations of the prior art proposals.
_ 4 _ Another and more specific object of the present invention aims at providing a new and improved construction of gas-blast switch of the previously mentioned type, wherein, without increasing the cross-sectional area of the support insulator, it is possible to obtain through the action of the heating device an adequately rapid circulation ofthe extinguish-ing gas, and wherein the length of the support insulator does not appreciably retard such extinguishing gas circulation.
Now in order to implement these and still further objects of the invention, which will become more readily apparent as the description proceeds, the gas-blast switch of the present development is manifested by the features that there emanates from the switching chamber a connection line, which is arranged adjacent the support insulator, and leads to the heating device.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein:
Figure 1 is a longitudinal sectional view through a first embodiment of gas-blast switch according to the invention;
and . _ --4vlal ~
Figure 2 is a longitudinal sectional view through a second embodiment of gas-blast switch according to the invention.
DETAILED DESCRIPTION OF T~IE PREFERRED EMBODIMENTS
Describing now the drawings, it is to be understood .
that throughout the various embodiments of gas-blast switches, shown respectively in Figuxes 1 and 2 there have been conveniently used the same reference characters to denote the same or analogous elements. Turning attention now to the drawings, the illustrated gas-blast switch 10 possesses a support housi.ng 11 which is at ground potential. Sealingly flanged to the support housing 11 is a substantially tubular-shaped, upright support insulator 12, the height of which essentially depends upon the rated voltage and also the site of erection of the gas-blast switch 10.
The support or carrier insulator 12 supports a switching chamber or compartment 13, which here is shown vertically arran-ged. The switching chamber or compartment 13 is surrounded by a substantially tubular-shaped insulator 14 and is sealingly closed at the top thereof by means of a connection or closure flange 15. Between the insulator 14 and the support insulator 12 there is arranged a lower connection flange 16 which is sealingly connected with the support insulator 12.
. ~ . _ _ _ . , . . . . _ 11~0~9~
~ rranged within the switching chamber or compartment 13 is a set of fixed contact elements 17 electrically connected with the upper connection flange 15 and a set of movable contact elements 18 electrically connected with the lower connection flange 16 and with which there is operatively associated, as is well known in this technology, a movable blast nozzle 19 and a pump cylinder 20. At the set of movable contact elements 18 there is coupled athrust and traction rod 21 which extends downwardly out of the switching chamber 13 and its lower end is anchored at a thrust and traction tube 22 formed of a suitable electrically insulating material, which, in turn, is coupled by a further rod 23 and a connecting rod 24 with a crank 25 of a suitable drive which is not here further shown since it is unimportant for comprehending the principles of the invention. A compression or pressure spring 26 which is supported at its upper end at the support housing 11 and at its lower end at the rod 23 serves as a force storage for the cut-off stroke, . I .
~ he switching chamber 13 and the inner spaces, generally indicated by reference character 60 of the support insulator 12 and the support housing 11 are sealingly closed towards the outside, but however are in flow communication with one another and contain a suitable extinguishing gas, typically for instance SF6, which is at a pressure of about 5 to 20 bars As already previously explained, it is important with such gas-blast switches to avoid condensation of the extinguishing gas at lower ¦
ambient temperatures.
- 7 - .
.__ _ . 1~4~
For this purpose there is provided an electrical heating device 27 which is connected with the support housing 11, this heating device 27 therefore likewise being at ground potential. The heating device 27 specifically contains a heating element, for instance an electrical. heating coil 28, which is arran~ed within a lower open pipe or conduit section 29. This pipe or conduit section 29 is coaxially arranged and with radial play within a substantially cup or beaker-shaped housing 30, preferably formed of a thermally poor however electrically adequate conducting material, and is connected at its upper end at a bend or elbow 31 at which there is connected a pipe or conduit 32 which radially leads out of the housing 30. The pipe or conduit 32 leads to a radial bore 33 within the flange 34 of the support housing 11, at which there is sealingly connec-ted the support insulator 12. At its upper end there is connec-ted at the housing 30 a connection conduit or line 35 which is arranged adjacent the support insulator 12 and essentially in parallelism therewith. This connection line 35 establishes , a flow connection or communication between the heating device 27 and the switching chamber 13.
This connection line 35, with the embodiment of Figure 1, contains a first, tubular-shaped insulator 36, a metallic connection collar or sleeve 38 which is attached at the height of the lower connection flange 16 and is secured thereto by means of a strut 37 or equivalent structure, as well as a second tubular-shaped insulator 39 which is arranged . il~
adjacent and parallel to the insulator 14. The upper end of the tubular-shaped insulator 39 is connected with a metallic connection element 42 having cooling ribs 40 and provided with a laterally arranged connection portion or stud 41. The connection stud or portion 41 is sealingly connected in any suitable and therefore not particularly illustrated manner with a radial bore 43 which leads ou-t of the upper connection flange 15. This radial bore 43, in turn, emanates from the upper end of the switching chamber or compartment 13. It is to be observed that within the gas-blast switch 10 -- whether such be in the cut-on position or in the illustrated cut-off position--there prevails essentially the same extinguishing gas pressure, apart from the small pressure gradient which is caused by the heating device 27 when the same is switched-on.
During operation, the heating element or coil 28 heats the extinguishing gas which wipingly contacts the same. This heated extinguishing gas then, in turn, ascends within the pipe or conduit 29 and at the same time draws further extinguish-ing gas out of the connection line or conduit 35, by means of the jacket space or chamber 70 remaining free between the housing 30 and the pipe or conduit 29 and the lower open end of the pipe 29. The heated extinguishing gas arrives by means of the pipe or conduit 32 and the bore 33 at the lower end into the internal space or chamber 60 of the support insulator 12 and ascends theretllrough and through the switching chan~er 13, so that, depe~ding upon the ambient temperature, it more or less _g_ . . .. ~
cools. Now the already somewhat cooled extinguishing gas departs from the switching chamber or compartment 13 by means of the bore 43 and the connection stud or connection portion 41 and arrives at the connec-tion element 42 which is provided with the coolin~ ribs 40, where it experiences a further cooling.
Hence, the gas now descendsfurther into the connection line or conduit 35 towards the heating device 27.
Since in the cut-on position of the gas-blast switch 10 there prevails within the switching chamber or compartment 13 also a certain amount of heat, depending upon the conducted current, the heating coil 28 need not be turned-on all of the time. Therefore it is possible, for instance at the region of the lower end of the connection line or conduit 35g to provide a here merely schematically illustrated temperature sensor or feeler 44 which, for instance, regulates by means of a switch 45 the heating power which is consumed by the heating coil or element 28, for instance selectively turns-on and turns-off the switch 45.
As to the variant embodiment of Figure 2 it is to be understood that the essential differencebetween the embodiment of Figure 1 and that of Figure 2 resides in the fact that the connec-tion line or conduit 35, with the arrangement of Flgure 2, only extends up to the lower connection flange 16 or equivalent structure. Accordingly, the connection line 35 only contains the tubular-shaped insulator 36 upon which i~43191 there is sealingly placed the connection element 42. The connection stud or connection portion 41 of the connection element 42 is connected with a throughpassage or passageway 46 which is formed in the lower connection flange 16. This passageway 46, in turn, emanates from the lower end of the switching chamber or compartment 13.
ll In both embodiments there is realized, even if there is only utilized the thermosiphon action, an effective circulation of the extinguishing gas through the heating device 27.
With the embodiment of Figure 1 the entire gas-blast switch is incorporated into such circulation path. This embodiment is therefore particularly suitable for erection of the gas-blast switchin open surroundings at locations where there are to be expected particularly low ambient temperatures.
The somewhat less complicated construction of gas-blast switch as shown in Figure 2, on the other hand, is more suitable for erection at regions where there are not to be expected such extreme low ambient temperatures.
Of course, the extinguishing gas circulation can be intensified with conventional and therefore not particularly illustrated means, such as pumps or ventilators. This intensified extinguishing gas circulation can be of advantage both when encountering extremely cold weather conditions and also , . . . , . . ~
11~0191 with high current load of the gas-blast switch, wherein in the last-mentioned case the heating coil 28 can be turned-off by the temperature feeler 44 and the switch 45.
While there are shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto, but may be otherwise variously embodied and practiced within the scope of the following claims. ACCORDINGLY, ll
Claims (6)
1. A gas-blast switch comprising:
a substantially tubular-shaped support insulator;
a support housing for supporting said support insulator;
said support housing being at ground potential;
means defining at least one switching chamber supported by said support housing;
each of said support housing and said support insulator having an inner space;
means for closing off from the surroundings the inner spaces of said support housing and said support insulator and said switching chamber while maintaining said inner spaces and switching chamber in flow communication with one another;
said inner spaces and switching chamber containing a pressurized extinguishing gas;
an extinguishing gas-heating device which is at ground potential;
said extinguishing gas-heating device being operatively connected by means of said support insulator with said switching chamber; and a connection line formed essentially by at least one substantially tubular insulator arranged parallel to said support insulator, said connection line leading from the switching chamber, disposed adjacent said support insulator and extending to said heating device.
a substantially tubular-shaped support insulator;
a support housing for supporting said support insulator;
said support housing being at ground potential;
means defining at least one switching chamber supported by said support housing;
each of said support housing and said support insulator having an inner space;
means for closing off from the surroundings the inner spaces of said support housing and said support insulator and said switching chamber while maintaining said inner spaces and switching chamber in flow communication with one another;
said inner spaces and switching chamber containing a pressurized extinguishing gas;
an extinguishing gas-heating device which is at ground potential;
said extinguishing gas-heating device being operatively connected by means of said support insulator with said switching chamber; and a connection line formed essentially by at least one substantially tubular insulator arranged parallel to said support insulator, said connection line leading from the switching chamber, disposed adjacent said support insulator and extending to said heating device.
2. The gas-blast switch as defined in claim 1, wherein:
said connection line emanates from a region of an end of the switching chamber which faces away from said support insulator.
said connection line emanates from a region of an end of the switching chamber which faces away from said support insulator.
3. The gas-blast switch as defined in claim 1, wherein:
said connection line emanates from a region of an end of the switching chamber which confronts the support insulator.
said connection line emanates from a region of an end of the switching chamber which confronts the support insulator.
4. The gas-blast switch as defined in claim 1, further including:
means for enabling the extinguishing gas to flow from a lower region towards an upper region within the support insulator and from an upper region towards a lower region within the connection line.
means for enabling the extinguishing gas to flow from a lower region towards an upper region within the support insulator and from an upper region towards a lower region within the connection line.
5. The gas-blast switch as defined in claim 4, wherein:
said means comprises gas cooling means arranged at the upper region of the connection line.
said means comprises gas cooling means arranged at the upper region of the connection line.
6. The gas-blast switch as defined in claim 4, wherein:
said means comprises a tube containing a heating element arranged at the lower region of said connection line;
said tube having a lower open end and an upper end; and said upper end of said tube being connected by means of a bend with a lower region of the inner space of said support insulator.
said means comprises a tube containing a heating element arranged at the lower region of said connection line;
said tube having a lower open end and an upper end; and said upper end of said tube being connected by means of a bend with a lower region of the inner space of said support insulator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH7857/79-8 | 1979-08-30 | ||
| CH785779A CH641292A5 (en) | 1979-08-30 | 1979-08-30 | EXHAUST GAS SWITCH. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1140191A true CA1140191A (en) | 1983-01-25 |
Family
ID=4331475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000357390A Expired CA1140191A (en) | 1979-08-30 | 1980-07-31 | Gas-blast switch comprising gas heating means |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0024542B1 (en) |
| JP (1) | JPS5636816A (en) |
| AT (1) | ATE1401T1 (en) |
| CA (1) | CA1140191A (en) |
| CH (1) | CH641292A5 (en) |
| DE (1) | DE3060706D1 (en) |
| ZA (1) | ZA805057B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2582145B1 (en) * | 1985-05-15 | 1987-06-19 | Alsthom | SULFUR HEXAFLUORIDE CIRCUIT BREAKER OPERATING IN A VERY LOW TEMPERATURE ENVIRONMENT |
| EP0204180B1 (en) * | 1985-05-15 | 1989-10-18 | Alsthom | Switch with sulfur hexafluoride operating in a very low temperature environment |
| JPH0382922U (en) * | 1989-12-12 | 1991-08-23 | ||
| FR2975836B1 (en) | 2011-05-24 | 2014-07-04 | Schneider Electric Ind Sas | ELECTRICAL GAS-INSULATING APPARATUS HAVING MEANS FOR CONTROLLING GAS PRESSURE |
| CN103107042A (en) * | 2013-01-22 | 2013-05-15 | 上海乐研电气科技有限公司 | Sulfur hexafluoride high-voltage circuit breaker for cold region |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3358104A (en) * | 1964-10-29 | 1967-12-12 | Westinghouse Electric Corp | Heating means for compressed-gas circuit interrupters |
| FR1531373A (en) * | 1966-11-03 | 1968-07-05 | Merlin Gerin | Closed circuit compressed gas circuit breaker |
| GB1229036A (en) * | 1968-07-23 | 1971-04-21 | ||
| DE1943218A1 (en) * | 1969-08-20 | 1971-03-04 | Siemens Ag | Gas pressure switch |
| DE2005024C3 (en) * | 1970-01-30 | 1974-10-24 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Gas switch |
| JPS4936751A (en) * | 1972-08-10 | 1974-04-05 | ||
| DE2249934A1 (en) * | 1972-10-12 | 1974-04-25 | Bbc Brown Boveri & Cie | LOW-LIQUID CIRCUIT BREAKER |
| JPS5113217A (en) * | 1974-07-23 | 1976-02-02 | Shinko Electric Co Ltd | DEJITARUYOKASETSUTOSHIKIJIKITEEPUNO UNTENSEIGYOHOHO |
| CH619559A5 (en) * | 1977-09-28 | 1980-09-30 | Sprecher & Schuh Ag | Compressed-gas high-voltage switch for outdoor installation |
-
1979
- 1979-08-30 CH CH785779A patent/CH641292A5/en not_active IP Right Cessation
-
1980
- 1980-07-19 EP EP80104263A patent/EP0024542B1/en not_active Expired
- 1980-07-19 DE DE8080104263T patent/DE3060706D1/en not_active Expired
- 1980-07-19 AT AT80104263T patent/ATE1401T1/en not_active IP Right Cessation
- 1980-07-31 CA CA000357390A patent/CA1140191A/en not_active Expired
- 1980-08-18 ZA ZA00805057A patent/ZA805057B/en unknown
- 1980-08-25 JP JP11688980A patent/JPS5636816A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0024542A1 (en) | 1981-03-11 |
| EP0024542B1 (en) | 1982-07-28 |
| DE3060706D1 (en) | 1982-09-16 |
| ZA805057B (en) | 1981-08-26 |
| JPS5636816A (en) | 1981-04-10 |
| ATE1401T1 (en) | 1982-08-15 |
| CH641292A5 (en) | 1984-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |