Switching fuse module

Abstract

Embodiments of the present disclosure relate to a switch-fuse module and a ring main unit. The switch-fuse module comprises: an enclosure having a first enclosure containing a first insulating gas and a second enclosure containing a second insulating gas; at least one disconnector arranged within the first enclosure; and at least one fuse at least partially surrounded by the second enclosure; wherein each of the first and second insulating gases has a global warming potential less than that of SF6, and the first and second enclosures are different and separate.

Description

Technical Field

[0001] The embodiments of this disclosure relate to a switch-fuse module, specifically to a switch-fuse module for an insulating gas with a global warming potential less than SF6, and a ring main unit including the switch-fuse module. Background Technology

[0002] In medium- and high-voltage equipment, gaseous sulfur hexafluoride (SF6) plays a crucial role as an insulating and arc-quenching medium, especially in switchgear. Besides its numerous advantages in technical properties, SF6 has a significant drawback: it possesses a very high global warming potential. It is a potent greenhouse gas. Therefore, alternative insulating gases such as ketone gases have recently been investigated.

[0003] For medium- and high-voltage equipment, from the customer's perspective, the desired equipment size is minimal, or at least no larger than that of conventional equipment. This allows customers to upgrade existing equipment without additional space requirements. Ideally, it should be integrated with existing customer components. From the manufacturer's perspective, existing production lines should be usable with minimal modifications for the most cost-effective production. This presents a challenge in the case of alternative gases, as it is assumed that these gases require greater distances to achieve dielectric properties comparable to SF6.

[0004] Therefore, there is a need for medium- and high-voltage equipment that addresses environmental concerns. There is also a need for medium- and high-voltage equipment with low footprint requirements that can be manufactured cost-effectively.

[0005] Terms and Definitions

[0006] The terms used in this application are briefly explained herein.

[0007] The term "axial" refers to the longitudinal axis of a component or unit. The term "longitudinal" indicates the direction in which the component has its maximum spatial extension and / or axis of symmetry. The term "lateral" refers to the direction perpendicular to the longitudinal axis, where the object has a second maximum extension and / or is parallel to the horizontal direction when mounted in a conventional mounting orientation. The axial direction refers to the direction parallel to the longitudinal axis of the component.

[0008] The range of values ​​defined as x1 or x2 up to y1 or y2 means that the value is within an interval such as x1 to y1 or x1 to y2 or x2 to y1 or x2 to y2.

[0009] like Figure 2The x and z directions shown can be perpendicular to each other and can define a horizontal plane or an xz plane. The y direction can be a vertical direction perpendicular to the horizontal plane. The view of the switch-fuse module in the direction perpendicular to the zy plane can be a side view. Thus, the footprint can be in the horizontal plane. Similarly, the view of the switch-fuse module in the direction perpendicular to the xy plane can be a front view or a rear view. Terms such as "vertical" and "horizontal" can refer to the corresponding orientation when the switch-fuse module is mounted in the conventional mounting orientation where the module is ready to operate, particularly when the operating panel is oriented on the vertical front of the switch-fuse module.

[0010] The height of an object can be understood as the object's extension in the y-direction, the depth can be understood as the object's extension in the z-direction, and the width can be understood as the object's extension in the x-direction.

[0011] In this document, "or" is understood as a non-exclusive separation. Therefore, the link "A or B" indicates that at least one of the statements A and B is true.

[0012] Furthermore, the terms “a” or “the” (such as in the expression “a fuse” or “the fuse”) are used to refer to at least one fuse. The quantity “a” or “the” includes the quantity “at least one”. If the term “at least one” is explicitly used, the subsequent use of “a” or “the” does not imply a departure from the above principle, according to which “a” or “the” is to be understood as “at least one”.

[0013] As used herein, the terms “substantially” or “basically” generally imply that there may be some deviation based on the characteristics indicated by the use of “substantially”, for example, up to 1%, up to 3%, or up to 10%. Summary of the Invention

[0014] In view of the above, a switch-fuse module according to claim 1 and a ring main unit having a switch-fuse module according to claim 13 are provided.

[0015] According to one aspect of this disclosure, a switch-fuse module is provided. The switch-fuse module includes a housing having a first enclosure comprising a first insulating gas and a second enclosure comprising a second insulating gas; at least one disconnecting switch disposed within the first enclosure; and at least one fuse at least partially surrounded by the second enclosure. The global warming potential of each of the first and second insulating gases is less than the global warming potential of SF6. The first enclosure and the second enclosure are different and separate.

[0016] According to another aspect of this disclosure, a ring main unit is provided. The ring main unit includes a switch-fuse module.

[0017] Some advantages associated with switch-fuse modules and ring main units are described below.

[0018] The advantage is that the configuration of functional units such as cable switches, circuit breakers and fuse modules in ring main units uses environmentally friendly gases as dielectrics.

[0019] The advantage is that it can provide guidelines such as dielectric level, mechanical links, and requirements for 12kV and / or 24kV ring main units for SF6-free equipment.

[0020] The advantage is that it allows for production using existing production lines with minimal changes, enabling the most cost-effective and efficient production.

[0021] The advantage is that it can keep the access door size of the switch and fuse module, whether horizontally or vertically relative to the existing switchgear, within specified limits. The device occupies as little floor space as possible, or at least no larger than the size of a conventional unit, allowing customers to upgrade existing equipment without increasing space requirements, and is best used in combination with existing customer components.

[0022] The advantage is that it can provide a switch-fuse combination for eco-efficient gas-insulated switchgear.

[0023] Other aspects, advantages, and features of this disclosure will be apparent from the dependent claims, description, and drawings. Attached Figure Description

[0024] To gain a more detailed understanding of the features set forth above in this disclosure, a more specific description of the disclosure, which has been briefly summarized above, can be obtained by referring to exemplary embodiments. The accompanying drawings relate to embodiments of this disclosure and are described below:

[0025] Figure 1 A schematic front view of a switch-fuse module according to an embodiment described herein is shown;

[0026] Figure 2 A perspective 3D view of a switch fuse module according to an embodiment described herein is shown; and

[0027] Figure 3 A perspective 3D view of a fuse compartment according to an embodiment described herein is shown. Detailed Implementation

[0028] Now, reference is made in detail to various embodiments, one or more examples of which are illustrated in each figure. Each example is provided by way of explanation and is not intended to be limiting. For example, features illustrated or described as part of one embodiment may be used in or combined with any other embodiment to produce yet another embodiment. This disclosure is intended to include such modifications and variations.

[0029] In the following description of the accompanying drawings, the same reference numerals refer to the same or similar parts. Generally, only the differences with respect to the various embodiments are described.

[0030] The reference numerals in the accompanying drawings are for illustrative purposes only. Aspects of the invention are not limited to any particular embodiment. Rather, unless otherwise stated, any aspect or embodiment described herein may be combined with any other aspect or embodiment described herein.

[0031] Figure 1 , Figure 2 A schematic diagram of a switch-fuse module according to an embodiment of the present invention is shown. Figure 1 The front view is shown, while Figure 2 A 3D perspective view of the switch fuse module is shown, where, for clarity, some additional typical components such as actuators, levers, motors, and caps are omitted from the figure. Reference Figure 1 and Figure 2 The details of the illustrative explanation should not be interpreted as limited to Figure 1 and Figure 2 The elements. Conversely, these details may also be combined with other embodiments, which are explained illustratively with reference to other accompanying drawings.

[0032] According to the embodiments described herein, the switch-fuse module 10 may include a housing 100 having a switch compartment 12 comprising a first insulating gas and a fuse compartment 14 comprising a second insulating gas; at least one disconnecting switch 300 disposed within the switch compartment 12; and at least one fuse 200 at least partially surrounded by the fuse compartment 14. The switch compartment 12 may be referred to as the first enclosure, and the fuse compartment 14 may be referred to as the second enclosure. The global warming potential of each of the first and second insulating gases may be less than the global warming potential of SF6. The switch compartment 12 may be different from and separate from the fuse compartment 14.

[0033] According to one embodiment, a cross-section intersecting the fuse axis of fuse 200 may be defined, wherein fuse 200 is (completely) surrounded by fuse compartment 14. According to one embodiment, the cylindrical sidewalls of fuse 200 may be surrounded by fuse compartment 14. Fuse 200 may be disposed in an opening (closed hole or through hole) of fuse compartment 14. Fuse 200 itself does not need to be included in the internal volume of fuse compartment 14 and may be filled with a gas that is the same as or different from the dielectric gas within fuse compartment 14 (e.g., ambient air at atmospheric pressure).

[0034] According to the embodiments described herein, a ring main unit (not shown in the figure) may include a switch-fuse module 10.

[0035] The technical advantage of separating the switch compartment 12 from the fuse compartment 14 is that existing production lines for known standard components (such as those commonly used with SF6) can be used to manufacture this equipment. This is advantageous because the equipment can be manufactured without additional production costs, which effectively ensures a competitive advantage.

[0036] Another technical advantage of having separate switch compartment 12 and fuse compartment 14 is that the pressure conditions and gas composition in each compartment can be established and controlled independently. This effect is beneficial due to the increased flexibility in terms of improving the control options for the respective compartments according to technical requirements and / or in customization to meet customer requirements.

[0037] Another technical advantage of separating the switch compartment 12 from the fuse compartment 14 is the modular concept, which improves maintenance and service options. If one unit malfunctions, only that unit needs to be repaired or replaced, while the other unit remains unaffected.

[0038] Figure 3 A perspective 3D view of the fuse compartment 14 according to an embodiment described herein is shown. Reference Figure 3 The details of the explanatory explanation should not be construed as limited to Figure 3 The elements. Conversely, these details can also be combined with other embodiments described in conjunction with other accompanying drawings.

[0039] Reference to aspects and embodiments of the present invention Figures 1 to 3 The description is as follows. Unless otherwise stated, the description of parts or aspects of one embodiment also applies to corresponding parts or aspects of another embodiment.

[0040] According to various embodiments, the switch compartment 12 and the fuse compartment 14 can be arranged adjacent to each other, preferably separated from each other by a first distance. The first distance can be at least 2 mm, 5 mm, or 10 mm, and at most 20 mm, 40 mm, or 100 mm.

[0041] According to various embodiments, the switch compartment 12 can be vertically arranged above the fuse compartment 14. This arrangement advantageously minimizes the horizontal footprint (i.e., the horizontal extension of the switch-fuse module 10 corresponding to its projection on the horizontal xz plane) while adequately maintaining the structural stability or smoothness of the equipment.

[0042] According to various embodiments, the disconnector switch 300 can be configured as a load break switch (LBS). In particular, the disconnector switch 300 can be configured as an integrated dual-position load break switch plus a separate second grounding switch including a grounding shaft. The disconnector switch 300 can have two shafts: i) one shaft is operable by handle 302 and used to open or close the main line, and ii) the other shaft is operable by handle 304 and used to open or ground the main line. The disconnector switch 300 can generally be configured as described in reference numeral 700 in EP 3780055 A1.

[0043] According to various embodiments, the switch-fuse module 10 may include at least one cylinder 210 or a fuse cylinder configured to receive the fuse 200.

[0044] According to various embodiments, the fuse 200 can be arranged in the cylinder 210. The cylinder 210 can be formed into an elongated cylindrical body and / or can be arranged horizontally. The longitudinal axis 212 of the cylindrical body 210 can be horizontal.

[0045] According to various embodiments, the fuse 200 can be electrically connected to the disconnecting switch 300 at its first end 214 via an internal sleeve 402 extending from the switch compartment 12 into the fuse compartment 14. In this document, the internal sleeve 402 can pass vertically through the horizontal enclosure wall of the fuse compartment 14 and the horizontal enclosure wall of the switch compartment 12. The first fuse end and the cylindrical area covering the first fuse end are both indicated by reference numeral 214.

[0046] According to various embodiments, the fuse 200 can be electrically connected to the connector sleeve 404 at the second end 216. The second fuse end and the cylindrical area covering the second fuse end are both indicated by reference numeral 216.

[0047] According to various embodiments, the connector sleeve 404 may be arranged laterally adjacent to the fuse 200.

[0048] According to various embodiments, the switch-fuse module 10 may include a second grounding switch arranged in the switch compartment 12 between the inner bushing 402 and the disconnecting switch 300.

[0049] According to various embodiments, at least one fuse may include three fuses 200. Preferably, each of the three fuses 200 may be connected to one of the three current phases. According to various embodiments, the switch-fuse module is an AC switch-fuse module.

[0050] According to various embodiments, at least one cylinder 210 may include three cylinders 210. Each cylinder 210 may receive a fuse 200.

[0051] According to various embodiments, the switch-fuse module 10 may include at least one internal sleeve 402 and / or at least one connector sleeve 404. The at least one internal sleeve may include three internal sleeves 402. The at least one connector sleeve may include three connector sleeves 404.

[0052] According to various embodiments, each of the three fuses 200 may have a longitudinal axis, which preferably coincides with the corresponding fuse axis 212. The axes i) may be arranged substantially in a plane, preferably in a vertical plane, and / or ii) may be arranged parallel to each other, and / or iii) may be oriented horizontally.

[0053] According to various embodiments, the connector sleeves 404 may be arranged successively, staggered, and / or in a stepped manner. For example, the connector sleeves 404 may be parallel to each other (their axes are parallel to each other) and / or along a common vertical connector sleeve plane (in... Figure 1 The planes are arranged in a zy plane, but are positioned at different horizontal positions (preferably, at different horizontal positions along their axes). Figure 1 In different z-positions, preferably, they are arranged in an equidistant, staggered manner. According to various embodiments, the sleeve 404 can pass through the stepped sidewall of the fuse compartment 14. According to various embodiments, the fuses 200 can be arranged parallel to each other (their axes are parallel to each other, and preferably, their axes are parallel to the axis of the sleeve) and / or along a common vertical fuse plane, preferably parallel to the connector sleeve plane. The fuse plane and the connector sleeve plane can be spaced apart from each other in a horizontal direction perpendicular to the fuse axis and / or the connector sleeve axis.

[0054] This arrangement has the following advantages: i) it allows electrical connections to be guided vertically downward, i.e., toward the lower or standing area of ​​the switch-fuse module 10 or housing 100; ii) it allows electrical connections to be arranged close to each other and preferably vertically and side-by-side in the lower area of ​​the switch-fuse module 10; and / or iii) it allows components to be arranged in a space-saving manner.

[0055] Furthermore, the connector sleeve 404 can be accessed by an operator from the same side as the first cylinder 210 end to insert or replace the fuse 200 and / or the cylinder 210.

[0056] According to various embodiments, the first insulating gas and the second insulating gas can be the same. Alternatively, the first insulating gas and the second insulating gas can be different.

[0057] According to various embodiments, the first insulating gas and the second insulating gas may have the same pressure. Alternatively, the first insulating gas and the second insulating gas may have different pressures.

[0058] According to various embodiments, the switch compartment 12 and the fuse compartment 14 can be airtight relative to each other. This means that the switch compartment 12 and the fuse compartment 14 can be airtightly isolated from each other. This affects the possibility of separately establishing and controlling the pressure conditions and gas composition in the respective compartments. This effect is beneficial based on the increased flexibility in terms of improving the control options of the respective compartments according to technical requirements and / or in customization according to customer requirements.

[0059] According to various embodiments, the dielectric strength of the first gas and the second gas may each be lower than the dielectric strength of SF6.

[0060] According to various embodiments, the switch-fuse module 10 may further include a first grounding switch 308 for grounding the second end 216 of the fuse 200; and at least one grounding shaft 310 for operating the first grounding switch 308 and a second grounding switch (and possibly a third grounding switch). The first grounding switch 308 may be arranged in the fuse compartment and may be mounted, for example, on the side of the fuse 200, for example, at the first end 214 of the fuse 200.

[0061] Multiple first grounding switches 308 can be arranged, one for each fuse 200. The grounding switches can be actuated by a common grounding shaft 310, thereby enabling the first grounding switches 308 to simultaneously ground fuses 200 (specifically, their second terminals 216). The first grounding switches 308 can be arranged downstream of fuses 200 within fuse compartment 14. Second grounding switches (not shown; arranged at or below disconnector switch 300) can be arranged upstream of fuses 200 within switch compartment 12. In this document, upstream and downstream relate to the direction from disconnector switch 300 to fuse 200.

[0062] Furthermore, a thin metal cylinder can be molded inside the wall of the fuse cylinder, wherein the wall is grounded. The fuse cylinder 120 may have two connection points, each of which is connected to a corresponding end 214, 216 of the fuse 200. The first end 214 of the fuse cylinder 210 is isolated from the fuse end and interconnected with each other by means of a cylinder grounding cable 218 configured as a grounding wire for shielding the cylinder.

[0063] According to various embodiments, the fuse compartment 14 can be configured as a pressurized tank.

[0064] According to various embodiments, the rated voltage range of the switch-fuse module 10 can be configured from 1kV to 52kV.

[0065] According to various embodiments, the switch-fuse module 10 may include at least one bus arranged at a second distance above the housing of the switch compartment 12, wherein the second distance is a distance dielectrically suitable for a rated voltage ranging from 1 kV to 52 kV, at least in the presence of a first insulating gas.

[0066] Some embodiments relating to the geometry and dimensions of the switch-fuse module 10 are described below.

[0067] The height of the switch-fuse module 10 and / or the ring main unit including the switch-fuse module 10 may be greater than 1000 mm and / or less than 1750 mm or greater than 1000 mm and / or less than 2000 mm. For example, the height of the switch-fuse module 10 may be less than 1750 mm.

[0068] The depth of the switch-fuse module 10 and / or the ring main unit may be greater than 500 mm and / or less than 850 mm or greater than 500 mm and / or less than 1000 mm. For example, the depth of the switch-fuse module 10 may be less than 850 mm.

[0069] The width of the switch-fuse module 10 and / or the ring main unit may be greater than 300 mm and / or less than 800 mm or greater than 300 mm and / or less than 1000 mm. For example, the width of the switch-fuse module 10 may be less than 800 mm.

[0070] It should be understood that larger switch-fuse module 10 and / or ring main unit dimensions may be suitable for higher rated voltages. For example, switch-fuse module 10 and / or ring main unit may be used for rated voltages ranging from 1kV or 12kV to 24kV, wherein the height is greater than 1000mm and / or less than 1750mm, the depth is greater than 500mm and / or less than 850mm, and / or the width is greater than 300mm and / or less than 800mm, while switch-fuse module 10 and / or ring main unit may be used for rated voltages ranging from 36kV to 42kV, wherein the height is greater than 1000mm and / or less than 2000mm, the depth is greater than 500mm and / or less than 1000mm, and / or the width is greater than 400mm and / or less than 1000mm.

[0071] Some embodiments relating to fuse 200 and disconnecting switch are described below.

[0072] In some embodiments, up to five switches (e.g., disconnect switches) and / or panels (e.g., general panels) may be included in the switch compartment 12.

[0073] The fuse cylinder 210 can be designed as a molded fuse cylinder. The fuse 200, the molded fuse cylinder 210, and / or the electrical connection can be arranged such that they transfer the busbar to the next panel or adjacent panel of the switchgear.

[0074] An arc-blowing switchgear is used as a disconnecting switch. Alternatively, an arc-blowing switchgear may be used in addition to a disconnecting switch. Alternatively, a vacuum interrupter may be used. An arc-blowing switchgear may include a fixed Phillips contact. The fixed Phillips contact may be connected to a busbar. An arc-blowing switchgear may include a linear sliding electrode, a blow-air compression chamber, and / or a blow-air port. An arc-blowing switchgear may include a rotating shaft for disconnecting the line, which may be, for example, a load-breaking shaft. Switch compartment 12 may cover the load-breaking shaft of the panel.

[0075] Some embodiments relating to insulating gases are described below.

[0076] The switch compartment 12 and the fuse compartment 14 can each be configured as a pressurized tank containing a first insulating gas and a second insulating gas with a dielectric strength lower than that of SF6. The pressurized tank can be configured to be filled, for example, during installation and / or commissioning to an absolute pressure ranging from 1.0 bar to 2.0 bar, preferably from 1.3 bar to 1.4 bar.

[0077] The global warming potential relative to CO2 gas can be understood as being assessed over a 100-year time interval. Over a 100-year period, the global warming potential of SF6 is 22,200 times that of CO2. Insulating gases with dielectric strength lower than that of SF6 include at least one gaseous component selected from the group consisting of: CO2, O2, N2, H2, air, N2O, hydrocarbons (specifically, CH4), perfluorinated or partially hydrogenated organic fluorine compounds, and mixtures thereof. In other embodiments, the insulating gas includes a background gas from a mixture of organic fluorine compounds, specifically selected from the group consisting of: CO2, O2, N2, H2, air, and the organic fluorine compounds selected from the group consisting of: fluoroethers, ethylene oxide, fluoroamines, fluoroketones, fluoroolefins, fluoronitriles, and mixtures thereof and / or decomposition products. For example, the insulating gas may include dry air or industrial air. Each insulating gas may be a dielectric insulating medium. The insulating gas may particularly include organofluorine compounds selected from the group consisting of fluoroethers, ethylene oxide, fluoroamines, fluoroketones, fluoroolefins, fluoronitriles, and mixtures thereof and / or decomposition products. Specifically, the insulating gas may include at least CH4 as a hydrocarbon, perfluorinated and / or partially hydrogenated organofluorine compounds, and mixtures thereof. The organofluorine compounds are preferably selected from the group consisting of fluorocarbons, fluoroethers, fluoroamines, fluoronitriles, and fluoroketones; and preferably, fluoroketones and / or fluoroethers, more preferably, perfluoroketones and / or hydrofluoroethers, more preferably, perfluoroketones having 4 to 12 carbon atoms, and even more preferably, perfluoroketones having 4, 5, or 6 carbon atoms. The insulating gas preferably comprises fluoroketones mixed with air or air components such as N2, O2, and / or CO2.

[0078] In certain cases, the fluoronitrile mentioned above is a perfluoronitrile, specifically a perfluoronitrile containing two and / or three and / or four carbon atoms. More specifically, the fluoronitrile can be a perfluoroalkylnitrile, specifically perfluoroacetonitrile, perfluoropropionitrile (C2F5CN), and / or perfluorobutyronitrile (C3F7CN). Most specifically, the fluoronitrile can be perfluoroisobutyronitrile (according to the molecular formula (CF3)2CFCN) and / or perfluoro-2-methoxypropionitrile (according to the molecular formula CF3CF(OCF3)CN). Among these, perfluoroisobutyronitrile is particularly preferred due to its low toxicity.

[0079] As an example, for switchgear with a rated voltage ranging from 1kV to 52kV (e.g., 12kV) or a rated voltage of 12kV, the switch-fuse module 10 can operate using air, dry air, and / or a gas mixture including air. In another example, for switchgear with a rated voltage ranging from 1kV to 52kV (e.g., 24kV) or a rated voltage of 24kV, the switch-fuse module 10 can operate using a gas mixture including C5 perfluoroketone and / or air.

[0080] Some embodiments relating to the first grounding switch 308 and the second grounding switch are described below.

[0081] The first grounding switch 308 can be vertically mounted in the fuse compartment 14. The first grounding switch 308 may include two contact elements 308, wherein a fixed contact element is adapted to receive a movable (e.g., fork-shaped) contact element for closing the switch. The movable contact element can be rotatably moved about a grounding shaft 310 to open the grounding switch 308 when separated from the fixed contact, or to close the switch when moved in the closing direction. Movement of the rotatable contact element can be achieved via the vertically arranged grounding shaft 310. The first grounding switch 308 can be configured to ground the second (downstream) fuse terminal 216.

[0082] The second grounding switch can be installed in the switch compartment 12, for example, below the disconnector switch 300. The second grounding switch can be configured to ground the first (upstream) fuse terminal 214. The first fuse terminal 214 and / or the second fuse terminal 216 can be the conductive side of the fuse 200.

[0083] Electrical connector 408 (in) Figure 3 The diagram illustrates the point, but... Figure 2 (Not shown) The first fuse terminal 214 can be connected to the disconnector switch 300 via the internal bushing 402.

[0084] Grounding shaft 310 can be configured to operate the first grounding switch 308. Another grounding shaft (not shown; coupled operating member 304) can be configured to operate the second grounding switch. Grounding shaft 310 and / or the other grounding shaft can simultaneously operate corresponding plurality of first grounding switches 308 and second grounding switches. The first grounding switches 308 and second grounding switches can be configured to operate simultaneously and / or be jointly connected to a common actuation mechanism. Therefore, both the upstream and downstream of fuse 200 can be grounded simultaneously.

[0085] Some embodiments relating to the components of the switch-fuse module 10 are described below.

[0086] The rated voltage range of the switch fuse module 10 can be configured to be 1kV to 52kV, or 1kV to 42kV, or 10kV to 42kV, or 12kV to 42kV, or 12kV and 24kV and / or 36kV and / or 40.5kV. In a particular example, it can be understood that a unit with a rated voltage of 24kV can meet the dielectric withstand requirement of at least 125kV lightning pulses.

[0087] The switch-fuse module 10 may include at least one busbar. In one example, the busbar may be a metal strip or bar, and / or may be housed within a switchgear, panel, and / or busbar channel enclosure, and in some examples, is suitable for local and / or high-current distribution and / or for connecting high-voltage equipment. The busbar may be arranged generally parallel to the vertical plane including the disconnecting switch and / or in the horizontal direction or alternatively in the vertical direction and / or perpendicular to the central axis 212 of the fuse 200.

[0088] Busbars can be installed above fuse 200 and / or disconnecting switch. Busbars can be long connections (e.g., busbars suitable for interconnecting multiple panels or distribution boards (such as switch-fuse modules)) or short connections (e.g., busbar segments interconnecting disconnecting switches to a third bushing, where the third bushing can be connected to a line or another busbar segment; in...) Figure 2 In the diagram, only the connection to the third sleeve 406 is shown.

[0089] The switch-fuse module 10 can be used to protect transformers that may be part of the power grid.

[0090] The switch-fuse module 10 can be interconnected, for example, via a busbar to other panels and / or distribution panels interconnected via busbars, thereby constituting a switchgear including a panel and / or distribution panel that includes the switch-fuse module 10. The fuse module can be the outermost panel of the switchgear. In the case where the switch-fuse module 10 is the outermost panel of the switchgear, top and side bushings can be installed. The positioning of components such as the fuse 200, electrical connections, busbars, and / or disconnect switches can provide the required dielectric strength. The outer surface of the conductive material can be configured to provide the required dielectric strength.

[0091] A ring main unit can be provided based on the aspects described herein. This ring main unit may include a switch-fuse module 10 according to the aspects and / or embodiments described herein.

[0092] This written description uses examples to disclose this disclosure, including the best mode, and also enables any person skilled in the art to practice the described subject matter, including making and using any device or system. The various embodiments described herein provide an improved switch-fuse module and ring main unit, wherein an environmentally friendly gas is used as the dielectric medium, the device can be manufactured economically, and increased flexibility is provided in terms of customization to customer requirements. While various specific embodiments have been disclosed for the foregoing, the mutually non-exclusive features of the embodiments described above can be combined with each other. The patentable scope is defined by the claims, and other examples are intended to fall within the scope of the claims if they have structural elements that are not indistinguishable from the literal language of the claims or if other examples include equivalent structural elements that are not substantially indistinguishable from the literal language of the claims.

[0093] List of reference numerals

[0094] 10 Switch Fuse Module

[0095] 12 Switch compartments, first enclosure

[0096] 14. Fuse compartment, second enclosure

[0097] 100 Casing

[0098] 106 First Distance

[0099] 200 fuse

[0100] 210 Fuse Cylinder

[0101] 212 cylinder axis

[0102] 214 Covering the cylindrical area at the first fuse end

[0103] 216 Covering the cylindrical area at the second fuse end

[0104] 218 cylindrical grounding cable

[0105] 300 disconnect switch

[0106] 302 Handle of a disconnecting switch for opening / closing load lines

[0107] 304 Handle for switching on / off grounding disconnect switches

[0108] 308 First Grounding Switch

[0109] 310 Grounding shaft of the first grounding switch

[0110] 402 internal sleeve

[0111] 404 connector sleeve

[0112] 406 Connection with the third bushing

[0113] 408 Electrical connector from the first fuse terminal to the disconnecting switch via an inner sleeve.

Claims

1. A switch-fuse module (10), comprising: The housing (100) has a first enclosure (12) including a first insulating gas and a second enclosure (14) including a second insulating gas. At least one disconnecting switch (300) is arranged within the first enclosure (12); as well as At least one fuse (200) is at least partially surrounded by the second enclosure (14); The global warming potential of each of the first and second insulating gases is less than that of SF6, and The first cover (12) is different from and separate from the second cover (14). The first enclosure (12) and the second enclosure (14) are airtightly isolated from each other, so that the pressure conditions and gas composition in the respective compartments can be established and controlled respectively.

2. The switch-fuse module (10) according to claim 1, wherein The first cover (12) is vertically arranged above the second cover (14).

3. The switch fuse module (10) according to claim 1, wherein The second enclosure (14) is configured as a pressurized tank.

4. The switch-fuse module (10) according to claim 1, wherein... The switch fuse module (10) includes at least one cylinder (210); and The fuse (200) is arranged in the cylinder (210).

5. The switch fuse module (10) according to claim 1, wherein The fuse (200) is electrically connected at its first end (214) to the disconnecting switch (300) via an inner sleeve (402) extending from the first housing (12) into the second housing (14).

6. The switch fuse module (10) according to claim 5, wherein The fuse (200) is electrically connected at its first end (214) to the disconnecting switch (300) via the inner sleeve (402) that passes vertically through the horizontal enclosure wall.

7. The switch-fuse module (10) according to claim 1, wherein The at least one fuse includes three fuses (200); Each of the three fuses (200) is connected to one of the three current phases; and Each of the three fuses (200) has a longitudinal axis.

8. The switch fuse module (10) according to claim 4, wherein The at least one cylinder includes three cylinders (210), each cylinder (210) receiving a fuse (200).

9. The switch-fuse module (10) according to claim 1, wherein The switch fuse module (10) includes three internal sleeves (402) and three connector sleeves (404).

10. The switch-fuse module (10) according to claim 5 or 6, further comprising: A first grounding switch (308) is arranged in the second enclosure (14) for grounding the second terminal (216) of the fuse (200); as well as A second grounding switch is arranged in the first enclosure (12) between the inner bushing (402) and the disconnecting switch (300) for grounding the first end (214) of the fuse (200).

11. The switch-fuse module (10) according to claim 1, wherein The dielectric strength of both the first insulating gas and the second insulating gas is lower than that of SF6.

12. The switch-fuse module (10) according to claim 1, wherein The disconnector (300) is configured as a load circuit breaker.

13. The switch fuse module (10) according to claim 1, wherein The rated voltage range of the switch-fuse module (10) is configured to be from 1kV to 52kV.

14. The switch fuse module (10) according to claim 4, wherein the cylinder (210) is arranged horizontally, or the longitudinal axis (212) of the cylindrical body of the cylinder is horizontal.

15. The switch fuse module (10) according to any one of claims 1 to 9 and 11 to 13, wherein the fuse (200) is electrically connected to the connector sleeve (404) at the second end (216), and the connector sleeve (404) is arranged laterally adjacent to the fuse (200).

16. The switch-fuse module (10) according to claim 7, wherein the longitudinal axes are arranged in a plane and are parallel to each other.

17. The switch fuse module (10) according to claim 7 or 16, wherein the longitudinal axis is horizontally oriented and the axis is arranged in a vertical plane.

18. The switch fuse module (10) according to claim 5 or 6, wherein the connector sleeves (404) are arranged in a stepped manner, staggered one another, and are accessed by an operator from the same side as the first end (214) of the fuse (200).

19. The switch-fuse module (10) according to claim 10 further includes at least one grounding shaft (310) for simultaneously operating the first grounding switch (308) and the second grounding switch.

20. The switch-fuse module (10) according to any one of claims 1 to 9 and 11 to 13, wherein the fuse (200) is configured to enter from the front of the switch-fuse module (10).

21. A ring main unit, comprising the switch-fuse module (10) according to claim 1.

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