A fuse-type disconnector

Abstract

The utility model provides a fuse -type disconnecting switch, including switch body, first terminal subassembly, second terminal subassembly, relay conducting board and current transformer, relay conducting board has first connecting plate, second connecting plate and third connecting plate that are connected in proper order, first connecting plate links with second terminal subassembly of switch body downside, third connecting plate extends to switch body upside and is located with first terminal subassembly on the upside of switch body, and the outgoing line side is turned back to switch body upside through relay conducting board, like this, the outgoing line busbar wiring path is shortened, the busbar material usage is reduced, and the cost of complete cabinet is reduced, in addition, the current transformer is integrated in the switch body, the space required for the independent installation of the transformer is avoided, the overall installation structure is more compact, the space occupation in the cabinet body is effectively reduced, and the design requirement of switch cabinet miniaturization and integration is satisfied.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a fuse-type disconnect switch. Background Technology

[0002] In existing fuse-type disconnect switches, such as Figure 10 As shown, its inlet terminal 101 and outlet terminal 102 are usually arranged on the upper and lower sides of the switch body 103, respectively. When the disconnecting switch is installed in the switch cabinet, the external wiring copper busbar needs to enter from the upper side of the cabinet. The inlet copper busbar 104 is connected to the inlet terminal 101 on the upper side of the switch body 103, and the outlet copper busbar 105 extends downward to the outlet terminal 102 located on the lower side of the switch body 103. This results in a long wiring path for the outlet copper busbar, which not only increases the amount of copper busbar material and installation cost, but also occupies more vertical space inside the cabinet, which is not conducive to the compactness of the internal layout of the cabinet. In addition, the existing current transformer 106 and fuse-type disconnecting switch are usually installed separately. The current transformer 106 needs to be fixed in another position inside the cabinet, which makes the overall installation structure loose and further increases the space occupied inside the cabinet, making it difficult to meet the design requirements of modern switch cabinet miniaturization and integration. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defects of the existing technology that the busbar uses a lot of materials and occupies a lot of space, so as to provide a fuse-type disconnect switch with less busbar material and a compact structure.

[0004] Therefore, this utility model provides a fuse-type disconnect switch, including a switch body, a transition conductive plate, and current transformers. The switch body includes multiple sets of first terminal assemblies, fuse elements, and second terminal assemblies disposed thereon. The first terminal assemblies and second terminal assemblies are located on the upper and lower sides of the switch body, respectively. The first terminal assemblies are used to connect to the incoming busbar, and the two ends of the fuse elements are connected to the first terminal assemblies and the second terminal assemblies, respectively. Multiple transition conductive plates have a first connecting plate, a second connecting plate, and a third connecting plate connected in sequence. The first connecting plate is connected to the second terminal assembly, and the third connecting plate extends towards the upper side of the switch body and is located on the same side of the switch body as the first terminal assembly. The third connecting plate is used to connect to the outgoing busbar. Multiple current transformers are installed in the switch body, and the through holes in the middle of the current transformers allow the second connecting plates to pass through.

[0005] The switch body has a first partition located in its middle and arranged vertically, and a current transformer is installed on the side of the first partition facing away from the first terminal assembly.

[0006] Multiple current transformers are arranged side-by-side or staggered within the switch body.

[0007] The first partition has a through hole in the middle. The second terminal assembly includes a second wiring board and a second contact. The second wiring board includes a fourth connecting plate, a fifth connecting plate and a sixth connecting plate that are bent and connected in sequence. The second contact is installed on the fourth connecting plate. The fifth connecting plate extends away from the fused core and passes through the through hole. The sixth connecting plate is fixed to the first connecting plate by screws or welding.

[0008] The first connecting plate and the third connecting plate are both arranged vertically, the second connecting plate is arranged horizontally and extends away from the first partition plate. The first connecting plate and the first partition plate are fixed by multiple screws, and a positioning structure is provided between the first connecting plate and the first partition plate. The positioning structure includes a positioning hole provided on the first connecting plate and a positioning block provided on the first partition plate and adapted to the positioning hole.

[0009] The switch body is equipped with transformer output terminals that are connected to the leads of multiple current transformers. The switch body is also equipped with an inner insulating plate and an outer insulating plate that are parallel to the first partition. The outer insulating plate is located on the side of the inner insulating plate away from the first partition and is used to shield part of the current transformers. One side of the inner insulating plate extends to the current transformers. The outer insulating plate and the inner insulating plate enclose a lead mounting cavity for mounting the leads of multiple current transformers. The inner insulating plate is provided with multiple heat dissipation holes.

[0010] The lower side of the switch body is provided with an emergency power interface corresponding to the second terminal assembly, and a grille plate for blocking the emergency power interface. The grille plate is detachably assembled with the switch body.

[0011] The switch body has slots on both sides of the emergency power interface and protrusions near the bottom of the emergency power interface. The slots are for the corresponding insertion of the two sides of the grille plate, and the grille plate is formed with elastic hooks that are connected to the protrusions.

[0012] The third connecting plate extends out of the switch body, and a second partition is provided between two adjacent third connecting plates. The second partition is assembled with the switch body through a snap-fit ​​structure. The snap-fit ​​structure includes a slot on one side of the switch body and a snap-fit ​​block on the second partition that is adapted to snap-fit ​​the slot.

[0013] The switch body has a third partition located between two adjacent current transformers. The current transformers have a first mounting foot and a second mounting foot disposed on both sides of the partition and staggered. During assembly, the second mounting foot of one current transformer and the first mounting foot of the adjacent current transformer are mounted on the same third partition.

[0014] The technical solution of this utility model has the following advantages: 1. The fuse-type disconnect switch provided by this utility model includes a switch body, a transition conductive plate, and a current transformer. The transition conductive plate has a first connecting plate, a second connecting plate, and a third connecting plate connected in sequence. The first connecting plate is connected to the second terminal assembly on the lower side of the switch body. The third connecting plate extends towards the upper side of the switch body and is located on the upper side of the switch body with the first terminal assembly. The third connecting plate is used to connect the outgoing busbar. By folding the outgoing side back to the upper side of the switch body through the transition conductive plate, the outgoing busbar does not need to extend downward from the upper side of the cabinet to the lower side of the switch body to form a connection with the outgoing terminal (second terminal assembly), reducing the amount of busbar material used and lowering the cost of the complete cabinet. In addition, by integrating the current transformer into the switch body, the space required for separate independent installation of the transformer is avoided, making the overall installation structure more compact and effectively reducing the space occupied inside the cabinet, thus meeting the design requirements of miniaturization and integration of switch cabinets.

[0015] 2. The fuse-type disconnect switch provided by this utility model has a first connecting plate, a second connecting plate, and a third connecting plate connected in sequence on the transfer conductive plate. The second connecting plate is arranged in the horizontal direction and extends away from the first partition plate. At the same time, the second connecting plate passes through the middle through hole of the current transformer, so that the second connecting plate also serves as the measured conductor of the current transformer. This increases the electrical clearance between the incoming busbar and the outgoing busbar, and eliminates the need for an additional independent current transformer sampling conductor, simplifying the internal structure and saving installation space.

[0016] 3. The fuse-type disconnect switch provided by this utility model has an emergency power interface on the lower side of the switch body that corresponds to the second terminal assembly, and is equipped with a removable grille for shielding. Under normal power supply conditions, the grille shields the emergency power interface to prevent foreign objects from entering and accidental contact, maintaining a neat appearance and protection level. When the main power supply fails, the grille can be quickly removed to expose the emergency power interface, allowing the external emergency power supply to be directly connected and electrically connected to the second terminal assembly, realizing the immediate activation of the backup power supply and ensuring the continuous operation of critical loads. The emergency power interface is integrated inside the switch body, eliminating the need for additional independent wiring devices, saving cabinet space and simplifying the design of emergency power distribution circuits.

[0017] 4. The fuse-type disconnect switch provided by this utility model has its two sides of the grille plate inserted into the slots on both sides of the emergency power interface. The grille plate is fixed by elastic hooks formed on its surface and hooked to protrusions near the bottom of the emergency power interface. The slots and the two sides of the grille plate form a guiding fit, allowing the grille plate to slide vertically or horizontally into the slots for initial positioning. The assembly path is clear and the operation is convenient. The elastic hooks and protrusions utilize elastic deformation to generate a pre-tightening force, and the protrusions act as a stop and limit for the elastic hooks, preventing the grille plate from loosening under natural vibration or accidental contact, ensuring reliable locking. When emergency connection is needed, pressing or moving the elastic hooks causes them to elastically deform and disengage from the protrusions, allowing the grille plate to slide out along the slots in the opposite direction. The entire disassembly and assembly process can be completed by hand without the need for screwdrivers or other tools, facilitating quick operation by maintenance personnel in emergency power outage situations.

[0018] 5. The fuse-type disconnect switch provided by this utility model has a current transformer with a first mounting foot and a second mounting foot disposed on both sides and staggered. A third partition is provided between two adjacent current transformers. During assembly, the second mounting foot of one current transformer and the first mounting foot of the adjacent current transformer are mounted together on the same third partition. The staggered double mounting foot structure allows adjacent current transformers to avoid each other during installation, avoiding spatial interference and overlap of the mounting feet. The two current transformers can be arranged closely along the side-by-side direction. The third partition also serves as a common mounting base for the left and right current transformers, reducing the thickness of the partition. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the fuse-type disconnect switch of this utility model; Figure 2 An assembly perspective view of the fuse-type disconnect switch with the incoming and outgoing busbars; Figure 3 for Figure 2 Cross-sectional view; Figure 4 This is an assembly diagram of the incoming busbar, the first terminal assembly, the second terminal assembly, the fuse core, the transition conductive plate, and the outgoing busbar. Figure 5 This is a schematic diagram showing the separation of the outer insulation plate and the switch body; Figure 6 This is a schematic diagram showing the separation of the grille plate and the switch body; Figure 7 A 3D view of a fuse-type disconnector after removing the outer and inner insulation plates; Figure 8 for Figure 7 A magnified structural diagram of part A in the middle; Figure 9 This is a 3D view of the switch body; Figure 10 This is a schematic diagram of the assembly of a fuse-type disconnect switch with the incoming busbar and the outgoing busbar in the prior art.

[0021] Explanation of reference numerals in the attached diagram: 101, Incoming terminal; 102, Outgoing terminal; 103, Switch body; 104, Incoming copper busbar; 105, Outgoing copper busbar; 106, Current transformer; 1. Switch body; 2. First terminal assembly; 3. Fuse core; 4. Second terminal assembly; 5. Incoming busbar; 6. Adapter conductive plate; 7. First connecting plate; 8. Second connecting plate; 9. Third connecting plate; 10. Outgoing busbar; 11. Current transformer; 12. First partition; 13. Through hole; 14. Second terminal block; 15. Second contact; 16. Fourth connecting plate; 17. Fifth connecting plate; 18. Sixth connecting plate; 20. Positioning hole; 21. Positioning block; 22. Current transformer output terminal; 23. Inner insulation plate; 24. Outer insulation plate; 25. Heat dissipation hole; 26. Emergency power interface; 27. Grille plate; 28. Slot; 29. ​​Protrusion; 30. Elastic hook; 31. Second partition; 33. Slot; 34. Locking block; 35. Third partition; 36. First mounting foot; 37. Second mounting foot. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Example This embodiment provides a fuse-type disconnect switch, such as Figure 1 and Figure 3 As shown, it includes a switch body 1, multiple transition conductive plates 6 and multiple current transformers 11.

[0027] Switch body 1, such as Figure 2 , Figure 3 and Figure 4 As shown, it includes multiple sets of first terminal assemblies 2, fuse elements 3, and second terminal assemblies 4 disposed thereon. The first terminal assemblies 2 and 4 are located on the upper and lower sides of the switch body 1, respectively. The first terminal assemblies 2 are used to connect to the incoming busbar 5, and the two ends of the fuse elements 3 are connected to the first terminal assemblies 2 and 4, respectively. In this embodiment, the switch body 1 has a first partition 12 located in its middle and arranged vertically. Figure 9 As shown, the first partition 12 has a perforation 13 in the middle, such as Figure 3 and Figure 4 As shown, the second terminal assembly 4 includes a second terminal block 14 and a second contact 15. The second terminal block 14 includes a fourth connecting plate 16, a fifth connecting plate 17 and a sixth connecting plate 18 that are bent and connected in sequence. The second contact 15 is installed on the fourth connecting plate 16. The fifth connecting plate 17 extends away from the fuse 3 and passes through the through hole 13. The sixth connecting plate 18 is fixed to the first connecting plate 7 by screws or welding.

[0028] Multiple adapter conductive plates 6, such as Figure 3 and Figure 4As shown, a first connecting plate 7, a second connecting plate 8, and a third connecting plate 9 are connected in sequence. The first connecting plate 7 is connected to the second terminal assembly 4. The third connecting plate 9 extends towards the upper side of the switch body 1 and is located on the same side of the switch body 1 as the first terminal assembly 2. The third connecting plate 9 is fixed to the outgoing busbar 10 by two screws. Both the first connecting plate 7 and the third connecting plate 9 are arranged vertically, while the second connecting plate 8 is arranged horizontally and extends away from the first partition plate 12. The first connecting plate 7 and the first partition plate 12 are fixed together by multiple screws, and a positioning structure is provided between the first connecting plate 7 and the first partition plate 12. The positioning structure includes a positioning hole 20 on the first connecting plate 7 and a positioning block 21 on the first partition plate 12 that is adapted to and connected to the positioning hole 20. In this embodiment, the third connecting plate 9 extends out of the switch body 1, and a second partition plate 31 is provided between two adjacent third connecting plates 9. The second partition plate 31 is assembled with the switch body 1 by a snap-fit ​​structure, such as... Figure 7 and Figure 8 As shown, the snap-fit ​​structure includes a slot 33 on one side of the switch body 1 and a snap-fit ​​block 34 on the second partition 31 that is adapted to snap-fit ​​with the slot 33. The bent extension structure of the fifth connecting plate 17 and the second connecting plate 8 effectively increases the electrical clearance between the incoming busbar 5 and the outgoing copper busbar 10, thereby improving safety and reliability and reducing the risk of insulation breakdown.

[0029] Multiple current transformers 11 are installed inside the switch body 1. A through hole in the center of each current transformer 11 allows a second connecting plate 8 to pass through. The current transformers 11 are installed on the side of the first partition 12 facing away from the first terminal assembly 2. For example... Figure 3 and Figure 5 As shown, the switch body 1 is equipped with transformer output terminals 22 connected to the leads of multiple current transformers 11. The switch body 1 also has an inner insulating plate 23 and an outer insulating plate 24 arranged parallel to the first partition 12. The outer insulating plate 24 is located on the side of the inner insulating plate 23 away from the first partition 12 and is used to shield part of the current transformers 11. One side of the inner insulating plate 23 extends to the current transformers 11. The outer insulating plate 24 and the inner insulating plate 23 enclose a lead mounting cavity for mounting the leads (not shown in the figure) of the multiple current transformers 11. The inner insulating plate 23 has multiple heat dissipation holes 25. Figure 7 and Figure 8As shown, the switch body 1 has a third partition 35 located between two adjacent current transformers 11. Each current transformer 11 has a first mounting foot 36 and a second mounting foot 37 disposed on both sides of the partition and staggered. During assembly, the second mounting foot 37 of one current transformer 11 is mounted on the same third partition 35 as the first mounting foot 36 of the adjacent current transformer 11. It should be noted that multiple current transformers 11 are arranged side-by-side or staggered within the switch body 1. In this embodiment, the current transformers 11 are positioned near the upper side of the switch body 1, or they can be installed in the middle of the switch body 1.

[0030] like Figure 5 and Figure 6 As shown, the lower side of the switch body 1 is provided with an emergency power interface 26 corresponding to the second terminal assembly 4, and a grille plate 27 for covering the emergency power interface 26. The grille plate 27 is detachably assembled with the switch body 1. The switch body 1 has slots 28 on both sides of the emergency power interface 26 and protrusions 29 near the bottom of the emergency power interface 26. The slots 28 are for the corresponding insertion of the two sides of the grille plate 27, and the grille plate 27 is formed with elastic hooks 30 that are hooked and connected to the protrusions 29.

[0031] The fuse-type disconnect switch provided by this utility model includes a switch body 1, a transition conductive plate 6, and a current transformer 11. The transition conductive plate 6 has a first connecting plate 7, a second connecting plate 8, and a third connecting plate 9 connected in sequence. The first connecting plate 7 is connected to the second terminal assembly 4 on the lower side of the switch body 1. The third connecting plate 9 extends towards the upper side of the switch body 1 and is located on the upper side of the switch body 1 with the first terminal assembly 2. By folding the outgoing line side back to the upper side of the switch body 1 through the transition conductive plate 6, the outgoing busbar 10 does not need to extend from the upper side of the cabinet down to the lower side of the switch body 1 to form a connection with the outgoing terminal (second terminal assembly), thereby shortening the outgoing busbar wiring path, reducing the amount of busbar material used, and reducing the cost of the complete cabinet. In addition, integrating the current transformer 11 into the switch body 1 avoids the space required for separate independent installation of the transformer, making the overall installation structure more compact, effectively reducing the space occupied inside the cabinet, and meeting the design requirements of miniaturization and integration of switch cabinets.

[0032] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A fuse-type disconnect switch, characterized in that, include: The switch body (1) includes multiple sets of first terminal assemblies (2) and second terminal assemblies (4) disposed thereon. The first terminal assemblies (2) and the second terminal assemblies (4) are located on the upper and lower sides of the switch body (1) respectively, and the first terminal assembly (2) is used to connect to the incoming busbar (5). Multiple transition conductive plates (6) have a first connecting plate (7), a second connecting plate (8) and a third connecting plate (9) connected in sequence. The first connecting plate (7) is connected to the second terminal assembly (4). The third connecting plate (9) extends toward the upper side of the switch body (1) and is located on the same side of the switch body (1) as the first terminal assembly (2). The third connecting plate (9) is used to connect the outgoing busbar (10). Multiple current transformers (11) are installed inside the switch body (1), and the middle through hole of the current transformer (11) is for the second connecting plate (8) to pass through.

2. The fuse-type disconnect switch according to claim 1, characterized in that, The switch body (1) has a first partition (12) located in its middle and arranged vertically, and the current transformer (11) is installed on the side of the first partition (12) facing away from the first terminal assembly (2).

3. The fuse-type disconnector according to claim 1 or 2, characterized in that, Multiple current transformers (11) are arranged side-by-side or staggered within the switch body (1).

4. The fuse-type disconnect switch according to claim 2, characterized in that, The first partition (12) has a through hole (13) in the middle. The second terminal assembly (4) includes a second terminal block (14) and a second contact (15). The second terminal block (14) includes a fourth connecting plate (16), a fifth connecting plate (17) and a sixth connecting plate (18) that are bent and connected in sequence. The second contact (15) is installed on the fourth connecting plate (16). The fifth connecting plate (17) passes through the through hole (13). The sixth connecting plate (18) is fixed to the first connecting plate (7) by screws or welding.

5. The fuse-type disconnector according to claim 2 or 4, characterized in that, The first connecting plate (7) and the third connecting plate (9) are both arranged vertically, the second connecting plate (8) is arranged horizontally and extends away from the first partition (12), the first connecting plate (7) and the first partition (12) are fixed by a plurality of screws, and a positioning structure is provided between the first connecting plate (7) and the first partition (12). The positioning structure includes a positioning hole (20) provided on the first connecting plate (7) and a positioning block (21) provided on the first partition (12) and adapted to be connected to the positioning hole (20).

6. The fuse-type disconnector according to claim 2, characterized in that, The switch body (1) is equipped with transformer output terminals (22) connected to the leads of multiple current transformers (11). The switch body (1) is also equipped with an inner insulating plate (23) and an outer insulating plate (24) arranged parallel to the first partition (12). The outer insulating plate (24) is located on the side of the inner insulating plate (23) away from the first partition (12) and is used to shield part of the current transformers (11). One side of the inner insulating plate (23) extends to the current transformers (11). The outer insulating plate (24) and the inner insulating plate (23) enclose a lead mounting cavity for mounting the leads of multiple current transformers (11). The inner insulating plate (23) is provided with multiple heat dissipation holes (25).

7. The fuse-type disconnect switch according to claim 1, characterized in that, The lower side of the switch body (1) is provided with an emergency power interface (26) corresponding to the second terminal assembly (4), and a grille (27) for covering the emergency power interface (26). The grille (27) is detachably assembled with the switch body (1).

8. The fuse-type disconnect switch according to claim 7, characterized in that, The switch body (1) has slots (28) on both sides of the emergency power interface (26) and protrusions (29) near the bottom of the emergency power interface (26). The slots (28) are for the corresponding insertion of the two sides of the grille plate (27). The grille plate (27) is formed with elastic hooks (30) that are hooked and connected to the protrusions (29).

9. The fuse-type disconnect switch according to claim 1, characterized in that, The third connecting plate (9) extends out of the switch body (1), and a second partition (31) is provided between two adjacent third connecting plates (9). The second partition (31) is assembled with the switch body (1) through a snap-fit ​​structure. The snap-fit ​​structure includes a slot (33) provided on one side of the switch body (1) and a snap-fit ​​block (34) provided on the second partition (31) and adapted to snap-fit ​​the slot (33).

10. The fuse-type disconnector according to claim 1, characterized in that, The switch body (1) has a third partition (35) located between two adjacent current transformers (11). The current transformer (11) has a first mounting foot (36) and a second mounting foot (37) disposed on both sides of it and staggered. During assembly, the second mounting foot (37) of one current transformer (11) and the first mounting foot (36) of the adjacent current transformer (11) are mounted on the same third partition (35).

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