CA3123505A1 - High-voltage feedthrough, and electrical high-voltage device with high-voltage feedthrough - Google Patents
High-voltage feedthrough, and electrical high-voltage device with high-voltage feedthrough Download PDFInfo
- Publication number
- CA3123505A1 CA3123505A1 CA3123505A CA3123505A CA3123505A1 CA 3123505 A1 CA3123505 A1 CA 3123505A1 CA 3123505 A CA3123505 A CA 3123505A CA 3123505 A CA3123505 A CA 3123505A CA 3123505 A1 CA3123505 A1 CA 3123505A1
- Authority
- CA
- Canada
- Prior art keywords
- voltage
- feedthrough
- transformer
- voltage feedthrough
- housing
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0406—Details thereof
- H02G3/0412—Heat or fire protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Insulators (AREA)
- Insulating Bodies (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
High-voltage Feedthrough, and Electrical High-voltage Device with High-voltage Feedthrough The invention relates to a high-voltage feedthrough (10) having an inner conductor (13), which is fed through an insulating body (11) and the first axial end of which is provided for connecting to an electrical conductor of an electrical high- voltage device and the second axial end of which is provided for connecting to a further electrical line, a housing (16), which at least partially encloses the insulating body on the outside, as well as having a fixing flange (20) for fixing the high-voltage feedthrough to a wall of the high-voltage device. The invention is characterized by a protective device (21) for a thermal protection of the high-voltage feedthrough, wherein the protective device comprises a shield cover (22) which at least partially encloses the housing and/or the fixing flange from the outside. The invention further relates to a high- voltage device (1) having the high-voltage feedthrough according to the invention.
Description
Description High-voltage Feedthrough, and Electrical High-voltage Device with High-voltage Feedthrough The invention relates to a high-voltage feedthrough having an inner conductor, which is fed through an insulating body, a housing, which at least partially encloses the insulating body on the outside, as well as having a fixing flange for fixing the high-voltage feedthrough to a wall of a high-voltage device. Suitably, a first axial end of the inner conductor is provided for connecting to an electrical conductor of the electrical high-voltage device, wherein a second axial end of the inner conductor is provided for connecting to a further electrical line.
A high-voltage feedthrough of this type is known from WO
2019/011426 Al. Its object is to insulate the inner conductor, which during an operation of the high-voltage feedthrough and the high-voltage device is at a high-voltage potential, from the environment which is at ground potential, including the wall of the high-voltage device.
In this case, the wall can generally be a wall of a transformer tank or even a wall of a valve hall for a power converter. The voltage which is to be insulated between the inner conductor and the environment can be greater than 500 kV, in some applications even 800 kV or more. The voltage which is to be insulated sometimes also determines the axial length of the high-voltage feedthrough or of the insulating body as well as the radius thereof. The design of the high-voltage feedthrough correspondingly also influences the weight thereof.
In the event of a fault in the electrical high-voltage device or the high-voltage feedthrough itself, this can result in a strong heating of the high-voltage feedthrough (and consequently also in a fire, for example). A heating of this Date Recue/Date Received 2021-06-28 type may have an undesirable, negative influence in particular also on the mechanical stability of the high-voltage feedthrough. In the case of strength failure, the high-voltage feedthrough may break off from the wall to which it is fixed and cause further damage in the environment of the high-voltage device. A precautionary increase of the mechanical stability of the high-voltage feedthrough is conventionally achieved by an overdimensioning, i.e. in particular increasing the diameter of the inner conductor. However, this has the disadvantage of further increasing the weight as well as increasing the costs of the high-voltage feedthrough.
The object of the invention is to propose a suitable high-voltage feedthrough which is as cost effective and reliable as possible.
In the case of a high-voltage feedthrough mentioned at the outset, the object is achieved according to the invention by a protective device for a thermal protection of the high-voltage feedthrough being provided, wherein the protective device comprises a shield cover which at least partially encloses the housing and/or the fixing flange from the outside. The protective device makes it possible to advantageously prevent the mechanical construction of the high-voltage feedthrough from losing its strength as a result of heating and consequently the entire high-voltage feedthrough no longer representing a solid bond. At the same time, the dimensions of the high-voltage feedthrough do not have to be substantially increased, which makes it possible to avoid substantial increases in weight and costs.
The shield cover can be cylindrical, or something similar, in shape and can be connected to the housing in a mechanical manner. It extends suitably in an axial manner between the first and the second end of the high-voltage feedthrough.
Date Recue/Date Received 2021-06-28 In particular if the housing is cylindrical in shape, the shield cover can be cylindrical or tubular in shape and can be arranged concentrically around the housing. A cylindrical design is also understood as such if, for example, the tube or the cylinder is not complete, instead retaining its basic shape, for example has slots or recesses, such as a longitudinal slot along its entire axial length, for example.
A radial distance of 50 mm to 300 mm, preferably 100 mm to 200 mm, is preferably provided between the housing and the shield cover, so that an intermediate space is formed between the housing and the shield cover. The housing can generally be formed from or comprise aluminum, for example. The distance between the housing and the shield cover makes it possible to slow down thermal transmission. In principle, it is in fact not absolutely necessary for the thermal protection to permanently guarantee the maintenance of mechanical stability of the high-voltage feedthrough. For most applications, it may be sufficient if the strength of the high-voltage feedthrough is maintained for a certain time until appropriate counter measures, for example fire extinguishing or another type of fault resolution, are successful. The intermediate space could in principle be filled with gas (filled with air) or even evacuated. In order to form the intermediate space, the shield cover can be connected to the housing or fixed thereto by means of a suitable spacer.
The shield cover is preferably made of steel, particularly preferably of stainless steel, even more preferably of an alloyed stainless steel, such as stainless steel alloyed with tungsten, for example (in addition molybdenum, vanadium, cobalt, for example). This selection of material for the shield cover has the advantage of a particularly good heat resistance.
According to one embodiment of the invention, the protective cover completely covers the fixing flange on the outside in a radial manner. The shield cover therefore extends in an axial Date Recue/Date Received 2021-06-28 manner in such a way that the fixing flange is covered by the shield cover on the outside. In particular, the advantage of this is that the fixing flange is also thermally protected by the shield cover. However, radial covering does not have to mean that the fixing flange is completely enclosed on all sides by the shield cover.
The shield cover is preferably arranged to form an intermediate space between the shield cover and the housing. The intermediate space can advantageously be at least partially filled with a fireproof material. Within the context of the invention, a material is understood to be fireproof if the mechanical strength thereof is still maintained at least at 600 C. Examples of fireproof materials are ceramic, glass, mineral fibers, refractory metals as well as noble metals.
The fireproof material suitably comprises magnesium oxide and/or ceramic. These substances advantageously have very good electrical insulating properties.
According to one embodiment of the invention, the insulating body is impregnated with a resin. Usually, the high-voltage feedthrough can have an insulating body made of resin impregnated paper (RIP). In this case, the insulating body can comprise a capacitor winding. The capacitor winding comprises a special paper which is impregnated with epoxy resin under vacuum. Conductive inserts made of aluminum foil are advantageously inserted between this during the winding process. These control inserts are used for controlling the electrical field and ensure an optimum voltage distribution owing to their good conductivity even in the case of rapid voltage changes. A high-voltage feedthrough of this type has particularly good dielectric properties. On the other hand, in the event of a high-voltage feedthrough of this type, it is particularly important to provide a thermal protection for the insulating body. High-voltage feedthroughs of this type can be Date Recue/Date Received 2021-06-28 set up for directly connecting transformers to SF6 insulated, encapsulated high-voltage switching systems, for example.
According to one embodiment of the invention, the high-voltage feedthrough is a transformer feedthrough. The high-voltage feedthrough is therefore used for feeding (in an electrically insulated manner) an electrical line which runs inside the transformer (transformer winding) out of the transformer tank (transformer housing). The electrical high-voltage device is correspondingly a high-voltage transformer and the electrical conductor of the electrical high-voltage device is a transformer winding of the high-voltage transformer. The transformer windings of high-voltage transformers are often electrically insulated by means of an insulating oil. The transformer tank is correspondingly at least partially filled with the insulating oil. However, an insulating oil of this type is relatively easily ignited, such that the development of a fire is possible in the event of a fault in the transformer.
For this reason, a thermal protection of the high-voltage feedthrough is particularly advantageous in this case.
The invention further relates to an electrical high-voltage device having a high-voltage transformer, wherein a transformer winding of the high-voltage transformer is fed out of a transformer housing of the high-voltage transformer by means of a high-voltage feedthrough. In this case, the high-voltage feedthrough comprises an inner conductor, which is fed through an insulating body and the first axial end of which is provided for connecting to an electrical conductor of an electrical high-voltage device and the second axial end of which is provided for connecting to a further electrical line, a housing, which at least partially encloses the insulating body on the outside, as well as a fixing flange for fixing the high-voltage feedthrough to a wall of the high-voltage device.
A high-voltage device of this type is known from WO 2019/011426 Al, which has already been mentioned.
Date Recue/Date Received 2021-06-28 The object of the invention is to specify a high-voltage device of this type which is as cost effective and reliable as possible.
In the case of a suitable high-voltage device, the object is achieved according to the invention by way of a protective device for a thermal protection of the high-voltage feedthrough, wherein the protective device comprises a shield cover which at least partially encloses the housing and/or the fixing flange from the outside.
The advantages of the high-voltage device according to the invention are derived in particular from the advantages already discussed which are derived from the utilization of the high-voltage feedthrough according to the invention.
According to one embodiment of the invention, the high-voltage transformer is a power converter transformer. A power converter transformer is part of a power converter assembly. A power converter transformer is normally in the near vicinity of a valve hall in which power converter valves of a power converter are arranged. In an arrangement of this type, there is the risk that, in the case of strength failure of the high-voltage feedthrough, the high-voltage feedthrough breaks out of its anchorage to the transformer and rips a hole in the valve hall, through which a fire, which may come from the transformer, can enter into the valve hall unhindered. For this reason, the thermal protection of the high-voltage device according to the invention is particularly advantageous in this application.
The invention is explained in more detail hereinafter using figures 1 to 3.
Figure 1 shows one exemplary embodiment of a high-voltage device according to the invention in a schematic representation;
Date Recue/Date Received 2021-06-28 figure 2 shows one exemplary embodiment of a high-voltage feedthrough according to the invention in a schematic representation;
figure 3 shows one further exemplary embodiment of a high-voltage feedthrough according to the invention in a schematic representation.
Figure 1 represents a high-voltage device 1. The high-voltage device 1 comprises a high-voltage transformer 2 which is a single-phase power converter transformer in the example represented. The high-voltage transformer 2 comprises a transformer tank 3, through the wall of which a high-voltage line (connected to a transformer winding) is fed out by means of a first and a second high-voltage feedthrough 4 or 5.
Figure 2 represents a high-voltage feedthrough 10. The high-voltage feedthrough can be used in the high-voltage device 1 from figure 1, for example. The high-voltage feedthrough 10 comprises an insulating body 11 which comprises resin impregnated paper as well as conductive control inserts. An inner conductor 13 is fed through the insulating body 11 along a longitudinal axis 12. A first axial end 14 of the inner conductor 13 is provided for connecting to an electrical conductor of the high-voltage device. A second axial end 15 of the inner conductor 13 is provided for connecting to a further electrical line.
The high-voltage feedthrough 10 comprises a housing 16 made of aluminum which is arranged around the symmetry axis 12 in a cylindrical manner and encloses the insulating body 11. The high-voltage feedthrough 10 further has two screw rings 17 and 18 as well as a mechanical reinforcement 19 with reinforcement ribs. A fixing flange or flange plate 20 is provided for mechanically connecting the high-voltage feedthrough 10 to a housing of a high-voltage transformer.
Date Recue/Date Received 2021-06-28 A protective device 21 is provided for a thermal protection of the high-voltage feedthrough 10. The protective device 21 comprises a shield cover 22 which is designed to be cylindrical or tubular in shape and is arranged concentrically around the insulating body 11 relative to the housing 16. The shield cover 22 is made of stainless steel. In the example represented, the radial distance between the housing 16 and the shield cover 22 is 150 mm, so that an intermediate space 24 is created. The intermediate space 24 is filled with a fireproof material 23, magnesium oxide in the example represented. The shield cover 22 extends in an axial manner substantially between the first end 15 of the inner conductor 13 and the fixing flange 20, but without enclosing the latter on the outside.
Figure 3 represents a high-voltage feedthrough 25 which is largely similar to the high-voltage feedthrough 10 from figure
A high-voltage feedthrough of this type is known from WO
2019/011426 Al. Its object is to insulate the inner conductor, which during an operation of the high-voltage feedthrough and the high-voltage device is at a high-voltage potential, from the environment which is at ground potential, including the wall of the high-voltage device.
In this case, the wall can generally be a wall of a transformer tank or even a wall of a valve hall for a power converter. The voltage which is to be insulated between the inner conductor and the environment can be greater than 500 kV, in some applications even 800 kV or more. The voltage which is to be insulated sometimes also determines the axial length of the high-voltage feedthrough or of the insulating body as well as the radius thereof. The design of the high-voltage feedthrough correspondingly also influences the weight thereof.
In the event of a fault in the electrical high-voltage device or the high-voltage feedthrough itself, this can result in a strong heating of the high-voltage feedthrough (and consequently also in a fire, for example). A heating of this Date Recue/Date Received 2021-06-28 type may have an undesirable, negative influence in particular also on the mechanical stability of the high-voltage feedthrough. In the case of strength failure, the high-voltage feedthrough may break off from the wall to which it is fixed and cause further damage in the environment of the high-voltage device. A precautionary increase of the mechanical stability of the high-voltage feedthrough is conventionally achieved by an overdimensioning, i.e. in particular increasing the diameter of the inner conductor. However, this has the disadvantage of further increasing the weight as well as increasing the costs of the high-voltage feedthrough.
The object of the invention is to propose a suitable high-voltage feedthrough which is as cost effective and reliable as possible.
In the case of a high-voltage feedthrough mentioned at the outset, the object is achieved according to the invention by a protective device for a thermal protection of the high-voltage feedthrough being provided, wherein the protective device comprises a shield cover which at least partially encloses the housing and/or the fixing flange from the outside. The protective device makes it possible to advantageously prevent the mechanical construction of the high-voltage feedthrough from losing its strength as a result of heating and consequently the entire high-voltage feedthrough no longer representing a solid bond. At the same time, the dimensions of the high-voltage feedthrough do not have to be substantially increased, which makes it possible to avoid substantial increases in weight and costs.
The shield cover can be cylindrical, or something similar, in shape and can be connected to the housing in a mechanical manner. It extends suitably in an axial manner between the first and the second end of the high-voltage feedthrough.
Date Recue/Date Received 2021-06-28 In particular if the housing is cylindrical in shape, the shield cover can be cylindrical or tubular in shape and can be arranged concentrically around the housing. A cylindrical design is also understood as such if, for example, the tube or the cylinder is not complete, instead retaining its basic shape, for example has slots or recesses, such as a longitudinal slot along its entire axial length, for example.
A radial distance of 50 mm to 300 mm, preferably 100 mm to 200 mm, is preferably provided between the housing and the shield cover, so that an intermediate space is formed between the housing and the shield cover. The housing can generally be formed from or comprise aluminum, for example. The distance between the housing and the shield cover makes it possible to slow down thermal transmission. In principle, it is in fact not absolutely necessary for the thermal protection to permanently guarantee the maintenance of mechanical stability of the high-voltage feedthrough. For most applications, it may be sufficient if the strength of the high-voltage feedthrough is maintained for a certain time until appropriate counter measures, for example fire extinguishing or another type of fault resolution, are successful. The intermediate space could in principle be filled with gas (filled with air) or even evacuated. In order to form the intermediate space, the shield cover can be connected to the housing or fixed thereto by means of a suitable spacer.
The shield cover is preferably made of steel, particularly preferably of stainless steel, even more preferably of an alloyed stainless steel, such as stainless steel alloyed with tungsten, for example (in addition molybdenum, vanadium, cobalt, for example). This selection of material for the shield cover has the advantage of a particularly good heat resistance.
According to one embodiment of the invention, the protective cover completely covers the fixing flange on the outside in a radial manner. The shield cover therefore extends in an axial Date Recue/Date Received 2021-06-28 manner in such a way that the fixing flange is covered by the shield cover on the outside. In particular, the advantage of this is that the fixing flange is also thermally protected by the shield cover. However, radial covering does not have to mean that the fixing flange is completely enclosed on all sides by the shield cover.
The shield cover is preferably arranged to form an intermediate space between the shield cover and the housing. The intermediate space can advantageously be at least partially filled with a fireproof material. Within the context of the invention, a material is understood to be fireproof if the mechanical strength thereof is still maintained at least at 600 C. Examples of fireproof materials are ceramic, glass, mineral fibers, refractory metals as well as noble metals.
The fireproof material suitably comprises magnesium oxide and/or ceramic. These substances advantageously have very good electrical insulating properties.
According to one embodiment of the invention, the insulating body is impregnated with a resin. Usually, the high-voltage feedthrough can have an insulating body made of resin impregnated paper (RIP). In this case, the insulating body can comprise a capacitor winding. The capacitor winding comprises a special paper which is impregnated with epoxy resin under vacuum. Conductive inserts made of aluminum foil are advantageously inserted between this during the winding process. These control inserts are used for controlling the electrical field and ensure an optimum voltage distribution owing to their good conductivity even in the case of rapid voltage changes. A high-voltage feedthrough of this type has particularly good dielectric properties. On the other hand, in the event of a high-voltage feedthrough of this type, it is particularly important to provide a thermal protection for the insulating body. High-voltage feedthroughs of this type can be Date Recue/Date Received 2021-06-28 set up for directly connecting transformers to SF6 insulated, encapsulated high-voltage switching systems, for example.
According to one embodiment of the invention, the high-voltage feedthrough is a transformer feedthrough. The high-voltage feedthrough is therefore used for feeding (in an electrically insulated manner) an electrical line which runs inside the transformer (transformer winding) out of the transformer tank (transformer housing). The electrical high-voltage device is correspondingly a high-voltage transformer and the electrical conductor of the electrical high-voltage device is a transformer winding of the high-voltage transformer. The transformer windings of high-voltage transformers are often electrically insulated by means of an insulating oil. The transformer tank is correspondingly at least partially filled with the insulating oil. However, an insulating oil of this type is relatively easily ignited, such that the development of a fire is possible in the event of a fault in the transformer.
For this reason, a thermal protection of the high-voltage feedthrough is particularly advantageous in this case.
The invention further relates to an electrical high-voltage device having a high-voltage transformer, wherein a transformer winding of the high-voltage transformer is fed out of a transformer housing of the high-voltage transformer by means of a high-voltage feedthrough. In this case, the high-voltage feedthrough comprises an inner conductor, which is fed through an insulating body and the first axial end of which is provided for connecting to an electrical conductor of an electrical high-voltage device and the second axial end of which is provided for connecting to a further electrical line, a housing, which at least partially encloses the insulating body on the outside, as well as a fixing flange for fixing the high-voltage feedthrough to a wall of the high-voltage device.
A high-voltage device of this type is known from WO 2019/011426 Al, which has already been mentioned.
Date Recue/Date Received 2021-06-28 The object of the invention is to specify a high-voltage device of this type which is as cost effective and reliable as possible.
In the case of a suitable high-voltage device, the object is achieved according to the invention by way of a protective device for a thermal protection of the high-voltage feedthrough, wherein the protective device comprises a shield cover which at least partially encloses the housing and/or the fixing flange from the outside.
The advantages of the high-voltage device according to the invention are derived in particular from the advantages already discussed which are derived from the utilization of the high-voltage feedthrough according to the invention.
According to one embodiment of the invention, the high-voltage transformer is a power converter transformer. A power converter transformer is part of a power converter assembly. A power converter transformer is normally in the near vicinity of a valve hall in which power converter valves of a power converter are arranged. In an arrangement of this type, there is the risk that, in the case of strength failure of the high-voltage feedthrough, the high-voltage feedthrough breaks out of its anchorage to the transformer and rips a hole in the valve hall, through which a fire, which may come from the transformer, can enter into the valve hall unhindered. For this reason, the thermal protection of the high-voltage device according to the invention is particularly advantageous in this application.
The invention is explained in more detail hereinafter using figures 1 to 3.
Figure 1 shows one exemplary embodiment of a high-voltage device according to the invention in a schematic representation;
Date Recue/Date Received 2021-06-28 figure 2 shows one exemplary embodiment of a high-voltage feedthrough according to the invention in a schematic representation;
figure 3 shows one further exemplary embodiment of a high-voltage feedthrough according to the invention in a schematic representation.
Figure 1 represents a high-voltage device 1. The high-voltage device 1 comprises a high-voltage transformer 2 which is a single-phase power converter transformer in the example represented. The high-voltage transformer 2 comprises a transformer tank 3, through the wall of which a high-voltage line (connected to a transformer winding) is fed out by means of a first and a second high-voltage feedthrough 4 or 5.
Figure 2 represents a high-voltage feedthrough 10. The high-voltage feedthrough can be used in the high-voltage device 1 from figure 1, for example. The high-voltage feedthrough 10 comprises an insulating body 11 which comprises resin impregnated paper as well as conductive control inserts. An inner conductor 13 is fed through the insulating body 11 along a longitudinal axis 12. A first axial end 14 of the inner conductor 13 is provided for connecting to an electrical conductor of the high-voltage device. A second axial end 15 of the inner conductor 13 is provided for connecting to a further electrical line.
The high-voltage feedthrough 10 comprises a housing 16 made of aluminum which is arranged around the symmetry axis 12 in a cylindrical manner and encloses the insulating body 11. The high-voltage feedthrough 10 further has two screw rings 17 and 18 as well as a mechanical reinforcement 19 with reinforcement ribs. A fixing flange or flange plate 20 is provided for mechanically connecting the high-voltage feedthrough 10 to a housing of a high-voltage transformer.
Date Recue/Date Received 2021-06-28 A protective device 21 is provided for a thermal protection of the high-voltage feedthrough 10. The protective device 21 comprises a shield cover 22 which is designed to be cylindrical or tubular in shape and is arranged concentrically around the insulating body 11 relative to the housing 16. The shield cover 22 is made of stainless steel. In the example represented, the radial distance between the housing 16 and the shield cover 22 is 150 mm, so that an intermediate space 24 is created. The intermediate space 24 is filled with a fireproof material 23, magnesium oxide in the example represented. The shield cover 22 extends in an axial manner substantially between the first end 15 of the inner conductor 13 and the fixing flange 20, but without enclosing the latter on the outside.
Figure 3 represents a high-voltage feedthrough 25 which is largely similar to the high-voltage feedthrough 10 from figure
2. The same and similar elements and components of the high-voltage feedthroughs 10 and 25 are provided with the same reference numbers in each case. For the sake of clarity, only the differences between the high-voltage feedthrough 25 and the high-voltage feedthrough 10 are therefore explored in greater detail hereinafter.
The high-voltage feedthrough 25 has a shield cover 26 which, in contrast to the shield cover 22 from figure 1, is axially elongated. The shield cover extends in an axial manner over the fixing flange 16, such that it is covered in a radial manner or is enclosed on the outside by the shield cover 26. For this purpose, the intermediate space 24 is increased, the radial width of which is 155 mm in the example represented. In this way, an effective thermal protection can also be provided for the fixing flange 20.
Date Recue/Date Received 2021-06-28
The high-voltage feedthrough 25 has a shield cover 26 which, in contrast to the shield cover 22 from figure 1, is axially elongated. The shield cover extends in an axial manner over the fixing flange 16, such that it is covered in a radial manner or is enclosed on the outside by the shield cover 26. For this purpose, the intermediate space 24 is increased, the radial width of which is 155 mm in the example represented. In this way, an effective thermal protection can also be provided for the fixing flange 20.
Date Recue/Date Received 2021-06-28
Claims (12)
1. A high-voltage feedthrough (10) having - an inner conductor (13) which is fed through an insulating body (11), - a housing (16) which at least partially encloses the insulating body (11) on the outside, - a fixing flange (20) for fixing the high-voltage feedthrough (10) to a wall of a high-voltage device, characterized by a protective device (21) for a thermal protection of the high-voltage feedthrough (10), wherein the protective device (21) comprises a shield cover (22) which at least partially encloses the housing (16) and/or the fixing flange (20) from the outside.
2. The high-voltage feedthrough (10) as claimed in claim 1, wherein the shield cover (21) is tubular in shape and is arranged concentrically around the housing (16).
3. The high-voltage feedthrough (10) as claimed in claim 2, wherein a radial distance of 50 mm to 300 mm, preferably 100 mm to 200 mm, is provided between the housing (16) and the shield cover (22), so that an intermediate space (24) is formed between the housing (16) and the shield cover (22).
4 The high-voltage feedthrough (10) as claimed in one of the preceding claims, wherein the shield cover (22) is made of steel, preferably stainless steel.
5. The high-voltage feedthrough (10) as claimed in one of the preceding claims, wherein the shield cover (22) completely covers the fixing flange (20) on the outside in a radial manner.
Date Recue/Date Received 2021-06-28
Date Recue/Date Received 2021-06-28
6. The high-voltage feedthrough (10) as claimed in one of the preceding claims, wherein the shield cover (22) is arranged to form an intermediate space (24) between the shield cover (22) and the housing (16).
7. The high-voltage feedthrough (10) as claimed in either one of claims 3 or 6, wherein the intermediate space (24) is at least partially filled with a fireproof material (23).
8. The high-voltage feedthrough as claimed in claim 7, wherein the fireproof material (23) comprises magnesium oxide and/or ceramic.
9. The high-voltage feedthrough (10) as claimed in one of the preceding claims, wherein the insulating body (11) is impregnated with a resin.
10. The high-voltage feedthrough (10) as claimed in one of the preceding claims, wherein the high-voltage feedthrough (10) is a transformer feedthrough which is set up to feed a transformer winding of a high-voltage transformer out of its transformer housing in an insulated manner.
11. An electrical high-voltage device (1) having a high-voltage transformer (2), wherein a transformer winding of the high-voltage transformer (2) is fed out of a transformer housing (3) of the high-voltage transformer (2) by means of a high-voltage feedthrough (4,5) as claimed in one of the preceding claims.
12. The high-voltage device (1) as claimed in claim 11, wherein the high-voltage transformer (2) is a power converter transformer.
Date Recue/Date Received 2021-06-28
Date Recue/Date Received 2021-06-28
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20183182.3 | 2020-06-30 | ||
| EP20183182.3A EP3934036B1 (en) | 2020-06-30 | 2020-06-30 | High voltage feedthrough and high voltage electrical device with high-voltage feedthrough |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3123505A1 true CA3123505A1 (en) | 2021-12-30 |
| CA3123505C CA3123505C (en) | 2023-10-17 |
Family
ID=71409205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3123505A Active CA3123505C (en) | 2020-06-30 | 2021-06-28 | High-voltage feedthrough, and electrical high-voltage device with high-voltage feedthrough |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3934036B1 (en) |
| CN (1) | CN216818012U (en) |
| CA (1) | CA3123505C (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE73572T1 (en) * | 1987-04-09 | 1992-03-15 | Siemens Ag | HIGH VOLTAGE INSULATION ARRANGEMENT FOR TRANSFORMERS AND CHOKE COILS, PARTICULARLY FOR HIGH VOLTAGE DIRECT CURRENT (HGUE) TRANSMISSION. |
| DE4303567C2 (en) * | 1993-02-08 | 1995-03-16 | Friedrich Dr Ing Stricker | Manufacture of synthetic diamonds |
| EP2620958B1 (en) * | 2012-01-26 | 2014-11-26 | Siemens Aktiengesellschaft | Shielding device for an electrically conductive connection element |
| DE102016205535A1 (en) * | 2016-04-04 | 2017-10-05 | Siemens Aktiengesellschaft | High-voltage bushing |
| KR20180018248A (en) * | 2016-08-10 | 2018-02-21 | 김정운 | A double insulation sleeve for steel plate through plastic pipe and wire |
| DE102017204935B4 (en) * | 2017-03-23 | 2023-02-09 | Siemens Energy Global GmbH & Co. KG | Electrode arrangement and electrical energy transmission device |
| EP3639282B1 (en) | 2017-07-12 | 2024-07-03 | HSP Hochspannungsgeräte GmbH | Pluggable high-voltage bushing and electrical device having pluggable high-voltage bushing |
| DE102017117636A1 (en) * | 2017-08-03 | 2019-02-07 | Südkabel GmbH | Plug-in implementation |
-
2020
- 2020-06-30 EP EP20183182.3A patent/EP3934036B1/en active Active
-
2021
- 2021-06-28 CA CA3123505A patent/CA3123505C/en active Active
- 2021-06-30 CN CN202121476818.2U patent/CN216818012U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3934036B1 (en) | 2025-03-19 |
| CA3123505C (en) | 2023-10-17 |
| CN216818012U (en) | 2022-06-24 |
| EP3934036A1 (en) | 2022-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101902443B1 (en) | Electric shielding arrangement of a disconnection point of a conduit for an hvdc component | |
| US4511873A (en) | Current transformer insulated by pressurized gas | |
| WO2018051959A1 (en) | Lightning arrester | |
| CN104335296A (en) | Device for discharging an electrical overvoltage | |
| JP2023543238A (en) | High voltage equipment and methods for increasing dielectric strength in high voltage equipment | |
| US5548081A (en) | Duct, particularly for high voltages with special electrode holder | |
| CA3123505C (en) | High-voltage feedthrough, and electrical high-voltage device with high-voltage feedthrough | |
| US4458101A (en) | Gas-insulated epoxy bushing having an internal throat shield and an embedded ground shield | |
| EP2057643B1 (en) | High voltage dc bushing and device comprising such high voltage bushing | |
| KR0127019B1 (en) | High voltage transformer | |
| US4574178A (en) | Electron gun | |
| EP3217416B1 (en) | Vacuum circuit breaker and direct current circuit breaker | |
| US4280015A (en) | High-tension line | |
| US8964346B2 (en) | Surge arrester | |
| US6242902B1 (en) | Measuring configuration, and use of the measuring configuration | |
| JP6316335B2 (en) | Gas insulated surge arrester | |
| CA2933882C (en) | High-voltage insulator | |
| US4318150A (en) | Protected electrical inductive apparatus | |
| JP2023543237A (en) | Coated conductors in high voltage equipment and methods for increasing dielectric strength | |
| CN117716460A (en) | Gas insulated switchgear | |
| US11469014B2 (en) | Electrical device having an insertable high-voltage bushing | |
| US11705709B2 (en) | Dry-type high voltage cable termination | |
| SU1089659A1 (en) | Vacuum circuit breaker | |
| GB2061626A (en) | Current transformer for a high-tension installation | |
| JP7402973B2 (en) | Measuring system for measuring the potential of a conductor inside a power switchgear and a corresponding power switchgear |