Hot-pluggable connection device and circuit breaker comprising same

Abstract

A hot-pluggable connection device and a circuit breaker comprising the same are provided. The hot-pluggable connection device comprises: an insulating housing comprising a first mounting side and a second mounting side, wherein the second mounting side comprises at least one accommodating portion having a first opening on the second mounting side and a second opening opposite to the first opening; and at least one connection assembly arranged in the housing, each connection assembly comprising: an electrically-conductive plate; and a clamping assembly comprising a holder and a clamping module, wherein the holder has a limiting surface on a side adjacent to a busbar, the clamping module comprises a positioning rivet, a first clamping portion and a second clamping portion, the first clamping portion clamps the electrically-conductive plate to form an electrical connection, the second clamping portion can clamp the busbar to form an electrical connection, and the positioning rivet fixes the clamping module on the holder. The accommodating portion completely accommodates the second clamping portion, and the limiting surface forms a stop cooperation with a wall surface of the second opening of the corresponding accommodating portion to limit the movement of the clamping assembly in the direction of the busbar.

Description

Technical Field

[0001] This utility model relates to the field of power systems, and in particular to a hot-swappable connection device for connecting circuit breakers and busbars. Background Technology

[0002] The statements in this section are merely to provide background information related to this utility model to aid in understanding it, and this background information does not necessarily constitute prior art.

[0003] Circuit breakers, as key protective devices in power distribution systems, primarily function to protect circuits and load equipment by rapidly disconnecting the power supply circuit when abnormal conditions such as overload or short circuit are detected through real-time monitoring of circuit current. Due to their reliable protective performance, circuit breakers are widely used in power distribution systems in critical locations such as data centers, high-end buildings, and hospitals, playing a vital role in ensuring the safe and stable transmission of power.

[0004] During the long-term operation of power distribution systems, maintenance personnel frequently need to perform various operations on circuit breakers to maintain system reliability due to factors such as equipment lifecycle management, dynamic load changes, and electrical faults. Specifically, these operations mainly include: equipment expansion / reduction for adaptation, such as replacing existing 25A circuit breakers with 63A circuit breakers to meet the current carrying requirements of new loads as IT equipment is upgraded or business scale is adjusted; emergency fault handling, where circuit breakers must be replaced promptly to restore circuit protection functions when they fail due to internal faults such as arc damage or contact aging; and three-phase imbalance adjustment, where load rebalancing is achieved by adjusting the phase sequence of circuit breakers to address overload in a particular phase caused by uneven load distribution. However, current circuit breaker operations generally rely on power outage work—that is, the power supply to the target circuit must be interrupted before the circuit breaker can be disassembled, replaced, or its phases adjusted.

[0005] However, in critical locations such as data centers, high-end buildings, and hospitals, where power reliability is extremely important, the continuous and stable operation of the power distribution system is directly related to the normal operation of core businesses and the safety of personnel and property. Any power outage can trigger a chain of risks. Taking data centers as an example, as the data hub and computing core of the information society, their continuous operation is directly related to the stability of business systems and the security of data assets. If a power outage is caused by circuit breaker operation, it may not only trigger server cluster downtime but also lead to data integrity corruption due to secondary faults such as data cache loss.

[0006] Therefore, it is urgent to realize online hot-swappable circuit breakers while ensuring operational safety and system stability. Utility Model Content

[0007] Therefore, the purpose of this utility model is to overcome the defects of the prior art and provide a hot-swappable connection device and a circuit breaker including the same.

[0008] According to one aspect of the embodiments of this application, a hot-swappable connection device for connecting a circuit breaker and a busbar is provided, comprising:

[0009] An insulating housing includes a first mounting side having a mechanical connection interface and a second mounting side opposite to the first mounting side; wherein the connecting device is mechanically connected to the circuit breaker via the mechanical connection interface, and the second mounting side includes at least one receiving portion having a first opening on the second mounting side and a second opening opposite to the first opening;

[0010] At least one connecting component is disposed within the housing, each of the at least one connecting component comprising:

[0011] A conductive plate includes a first end and a second end, the conductive plate extending through the first mounting side, the first end being mechanically connectable to the circuit breaker to form an electrical connection between the conductive plate and the circuit breaker;

[0012] A clamping assembly includes a retainer and a clamping module, wherein the retainer has a limiting surface on the side adjacent to the busbar, and the clamping module includes a positioning rivet, a first clamping portion, and a second clamping portion; wherein the first clamping portion and the second clamping portion have different opening angles about the positioning rivet to generate different clamping forces; the first clamping portion clamps the conductive plate to form an electrical connection, and the second clamping portion can clamp the busbar to form an electrical connection; the positioning rivet fixes the clamping module to the retainer;

[0013] The receiving portion completely accommodates the second clamping portion;

[0014] The limiting surface and the wall surface where the second opening of the corresponding receiving part is located form a stop to restrict the movement of the clamping assembly in the direction of the busbar.

[0015] According to the connecting device of this utility model, preferably, the clamping module includes:

[0016] At least one pair of contact fingers, each of the at least one pair of contact fingers including a non-clamping side with a groove and a clamping side opposite to the non-clamping side, the clamping sides of each pair of contact fingers being arranged opposite each other with the positioning rivet as the center to form the first clamping portion and the second clamping portion;

[0017] A spring sheet, comprising a first spring arm and a second spring arm set at a specified angle;

[0018] The retainer restricts the spring sheet within the groove of each finger, causing the first and second spring arms of the spring sheet to elastically deform, thereby providing clamping force for the first and second clamping portions.

[0019] According to the connection device of this utility model, preferably, the first clamping part and the conductive plate and the second clamping part and the busbar are both in line contact.

[0020] According to the connection device of the present invention, preferably, the connection device includes one or more connection components corresponding to one or more busbars, and the connection components are staggered relative to each other along the length direction of the one or more busbars.

[0021] According to the connecting device of this utility model, preferably, the clamping sides of each pair of fingers are arranged relative to each other at a specified distance.

[0022] According to the connecting device of the present invention, preferably, the retainer restricts the spring sheet to the groove at the connection between the first spring arm and the second spring arm.

[0023] According to the connecting device of this utility model, preferably, the specified angle is determined according to the thickness of the busbar.

[0024] According to the connecting device of this utility model, preferably, each pair of the at least one pair of contact fingers is arranged side by side.

[0025] According to the connection device of this utility model, preferably, the connection assembly further includes a limiting member, which is fixed on the conductive plate to restrict the movement of the clamping assembly toward the circuit breaker.

[0026] According to another aspect of the embodiments of this application, a circuit breaker is also provided, including a connection device according to the embodiments of this application.

[0027] This invention provides a hot-swappable connection device and a circuit breaker including the same. By employing a hot-swappable connection device, this invention enables hot-swapping of the circuit breaker and busbar. This eliminates the need for power outages during maintenance, replacement, capacity expansion, or commissioning of the circuit breaker in the power distribution system. It fundamentally avoids the downtime of downstream loads (such as industrial production equipment, data center servers, and critical civil power facilities) caused by traditional power outages, ensuring power continuity and reducing adverse effects such as production losses, data loss, or inconvenience caused by power outages. Furthermore, eliminating the need for a complete power outage reduces the impact of frequent power system starts and stops, avoids damage to other equipment within the system caused by voltage fluctuations during start-up and shutdown, and extends the service life of the power distribution system and related equipment. Attached Figure Description

[0028] The embodiments of this utility model will be further described below with reference to the accompanying drawings, wherein:

[0029] Figure 1 A schematic diagram of the structure of a hot-swappable connection device according to an embodiment of the present invention is shown;

[0030] Figure 2 An axial view and a side view of the insulating housing of a hot-swappable connection device according to an embodiment of the present invention are shown;

[0031] Figure 3 A schematic diagram of the clamping assembly of the hot-swappable connection device according to an embodiment of the present invention is shown;

[0032] Figure 4 A schematic diagram of the structure of the retainer of the hot-swappable connection device according to an embodiment of the present invention is shown;

[0033] Figure 5 A schematic diagram of the contact fingers of a hot-swappable connection device according to an embodiment of the present invention is shown;

[0034] Figure 6 A schematic diagram of the spring sheet of a hot-swappable connection device according to an embodiment of the present invention is shown;

[0035] Figure 7 A schematic diagram of the structure of the limiting member of the hot-swappable connection device according to an embodiment of the present invention is shown;

[0036] Figure 8 A schematic diagram of the structure of a circuit breaker according to an embodiment of the present invention is shown; Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments given in this utility model are for illustrative purposes only and do not limit the scope of protection of this utility model.

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description, in conjunction with the accompanying drawings, provides specific embodiments. It should be understood that the described embodiments are only a portion of, and not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0039] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0040] Figure 1 A schematic diagram of a hot-swappable connection device according to an embodiment of the present invention is shown. Figure 1 As shown, the hot-swappable connection device 10 for connecting the circuit breaker 20 and the busbar 30 includes an insulating housing 101 and at least one connection component 102 disposed within the insulating housing 101. The busbar, also known as a busbar, has a certain mechanical strength and is not easily deformed. The electrical connection between the circuit breaker 20 and the busbar 30 can be achieved by operating the hot-swappable connection device 10.

[0041] Figure 2 An axial view and a view along direction A are shown of the insulating housing of the hot-swappable connection device according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the insulating housing 101 includes a first mounting side 1011 with a mechanical connection interface and a second mounting side 1012 opposite to the first mounting side 1011. The connecting device 10 is mechanically connected to the circuit breaker 20 at the first mounting side 1011 via the mechanical connection interface, and electrically connected to the busbar 30 at the second mounting side 1012 via an electrical connection interface. The second mounting side 1012 includes at least one receiving portion 1013, which has a first opening 1014 on the second mounting side 1012 and a second opening 1015 opposite to the first opening 1014.

[0042] like Figure 1 As shown, the connection assembly 102 includes a conductive plate 1021 and a clamping assembly 1022. The conductive plate 1021 includes a first end and a second end. The conductive plate 1021 extends through a first mounting side 1011, and its first end is mechanically connected to the circuit breaker 20 by means of, for example, riveting, bolting, or other methods to form an electrical connection between the conductive plate 1021 and the circuit breaker 20. The conductive plate 1021 can adopt any structure that meets the installation requirements of the connection device 10 and the circuit breaker 20.

[0043] Figure 3 A schematic diagram of the clamping assembly of a hot-swappable connection device according to an embodiment of the present invention is shown. Figure 1 and Figure 3As shown, the clamping assembly 1022 includes a retainer 1023 and a clamping module 1024. The clamping module 1024 includes a positioning rivet 1026, a first clamping portion 1027, and a second clamping portion 1028. The first clamping portion 1027 and the second clamping portion 1028 have different opening angles around the positioning rivet 1026 to generate different clamping forces. The first clamping portion 1027 clamps the conductive plate 1021 to form an electrical connection, thereby forming an electrical connection with the circuit breaker 20. The second clamping portion 1028 clamps the busbar 30 to form an electrical connection. The positioning rivet 1026 fixes the clamping module 1024 to the retainer 1023. The retainer 1023 has a limiting surface 1025 on the side adjacent to the busbar 30.

[0044] like Figure 1 and Figure 3 As shown, the receiving portion 1013 of the insulating housing 101 completely accommodates the second clamping portion 1028. The limiting surface 1025 of the retainer 1023 and the wall surface 1016 where the second opening 1015 of the corresponding receiving portion 1013 is located form a stop engagement to restrict the movement of the clamping assembly 1022 toward the busbar 30.

[0045] In some embodiments of this utility model, the clamping module 1024 includes at least a pair of fingers 9. Figure 5 A schematic diagram of the contact fingers of a hot-swappable connection device according to an embodiment of the present invention is shown. Figure 1 and Figure 5 As shown, the finger 9 includes a non-clamping side 92 and a clamping side 91 opposite to the non-clamping side 92. The non-clamping side 92 has a groove 93. The clamping sides 91 of each pair of fingers 9 are pivotally arranged opposite each other with a positioning rivet 1026 to form a first clamping portion 1027 and a second clamping portion 1028.

[0046] In some embodiments of the present invention, the clamping module 1024 further includes a spring sheet 8 for applying elastic force to the finger 9 via the non-clamping side 92 of the finger 9 to provide better clamping force between the two fingers 9. Figure 6 A schematic diagram of the spring sheet of a hot-swappable connection device according to an embodiment of the present invention is shown. Figure 6 As shown, the spring sheet 8 includes a first spring arm 81 and a second spring arm 82 set at a specified angle α.

[0047] In some embodiments of this invention, the specified angle α can be determined based on the thickness of the busbar 30. Furthermore, by adjusting the size of the specified angle α, the clamping force provided by the first clamping part 1027 and the second clamping part 1028 can be changed to better realize the hot-swappable function of the connecting device.

[0048] Figure 4A schematic diagram of the structure of the retainer of the hot-swappable connection device according to an embodiment of the present invention is shown. Figure 4 As shown, the retainer 1023 has a first sidewall 41, a second sidewall 42, and a bottom wall 43 connecting the first sidewall 41 and the second sidewall 42. The bottom wall 43 includes an opening 44, a first crossbeam 45, and a second crossbeam 46. The first sidewall 41 and the second sidewall 42 have through holes 48.

[0049] like Figure 1-6 As shown, the clamping module 1024 passes through the opening 44 of the retainer 1023, and the first crossbeam 45 and the second crossbeam 46 of the retainer 1023 respectively constrain the spring sheet 8 in the groove 93 of each contact finger 9. The first crossbeam 45 and the second crossbeam 46 compress the spring sheet 8, causing the first spring arm 81 and the second spring arm 82 to undergo elastic deformation, providing clamping force for the first clamping part 1027 and the second clamping part 1028. At the same time, the positioning rivet 1026 passes through the through hole 48 and is riveted to the retainer 1023, fixing the clamping module 1024 in the opening 44.

[0050] In some embodiments of this utility model, such as Figure 3 As shown, each pair of contacts 9 is arranged side-by-side perpendicular to the first crossbeam 45 and the second crossbeam 46. By using multiple pairs of contacts arranged side-by-side instead of a single pair of contacts with the same conductive cross-sectional area, the surface area of ​​the conductor can be significantly increased under the same current carrying capacity, thereby dispersing the skin effect depth of high-frequency current. Especially under high-frequency or high-current conditions, it can significantly reduce the loss caused by current concentration on the conductor surface due to the skin effect, improving the overall efficiency of current transmission and conductivity. At the same time, the side-by-side structure of multiple contacts enhances heat dissipation capacity, disperses local heat generation, reduces temperature rise caused by concentrated heat generation, and ensures the stability and reliability of the contacts during long-term operation.

[0051] In some embodiments of this invention, line contacts are formed between the first clamping part 1027 and the conductive plate 1021, and between the second clamping part 1028 and the busbar 30. Line contacts, compared to point contacts, significantly increase the contact area, and compared to surface contacts, their contact pressure is more concentrated, thereby effectively reducing contact resistance, minimizing energy loss during current transmission, and reducing localized heating caused by losses, making them particularly suitable for high-current scenarios. Furthermore, line contacts can better adapt to minute mechanical vibrations and thermal expansion, maintaining stable electrical contact performance and further enhancing the system's durability and adaptability.

[0052] In some embodiments of this invention, the clamping sides 91 of each pair of fingers 9 are arranged opposite each other at a specified distance. This allows the first clamping portion 1027 and the second clamping portion 1028 to provide a larger opening angle to accommodate busbars of different thicknesses.

[0053] In some embodiments of this utility model, the retainer 1023 restricts the spring sheet 8 to the groove 93 at the connection between the first spring arm 81 and the second spring arm 82. Specifically, when the retainer 1023 presses down on the first spring arm 81 and the second spring arm 82 at this connection, the first spring arm 81 and the second spring arm 82 can be subjected to uniform force, thereby producing stable elastic deformation.

[0054] In embodiments of this invention, the number of connection components 102 included in the hot-swappable connection device 10 is related to the number of phases of the power distribution system to which it is applied. For example, in a three-phase power distribution system, the hot-swappable connection device 10 may include three connection components 102. When the connection device 10 includes more than one connection component 102 corresponding to more than one busbar 30, the connection components 102 are staggered relative to each other along the length direction of more than one busbar 30. This effectively reduces the size of the hot-swappable connection device 10.

[0055] In some embodiments of this utility model, when electrically connecting the circuit breaker 20 and its load circuit to the busbar 30: firstly, the connecting component 102 in the hot-swappable connection device 10 is installed to the circuit breaker 20 (i.e., the mechanical and electrical connection between the two is completed); then, the insulating housing 101 is installed to the outside of the connecting component 102, and the insulating housing 101 is mechanically connected to the circuit breaker 20, for example, by bolts, at the first mounting side 1011 of the insulating housing 101; thereby, the hot-swappable connection device 10 and the circuit breaker 20 are firmly connected as a whole; then, the entrance of the second clamping part 1028 is brought into contact with the busbar 30, and the hot-swappable connection device 10 or the circuit breaker 20 is pushed toward the busbar 30 until the second clamping part 1028 reliably clamps the busbar 30 until the hot-swappable connection device 10 or the circuit breaker 20 can no longer be pushed toward the busbar 30. The above process does not require power interruption and can safely and reliably connect the circuit breaker 20 and its load circuit to the bus 30.

[0056] In this embodiment of the invention, the process of disconnecting the circuit breaker 20 and its load circuit from the busbar 30 is as follows: First, pull the circuit breaker 20 away from the busbar 30. The circuit breaker 20 causes the insulating housing 101 of the hot-swappable connection device 10 to move in the same direction. Since the limiting surface 1025 of the retaining member 1023 and the wall surface 1016 where the second opening 1015 of the receiving portion 1013 inside the insulating housing 101 are located form a stop engagement, the insulating housing 101 will also cause the connecting assembly 102 to move away from the busbar 30 until the connecting assembly 102 is completely separated from the busbar 30. The above process also achieves safe disconnection of the circuit breaker 20 and its load circuit from the busbar 30 without power interruption.

[0057] In some embodiments of this utility model, such as Figure 1 As shown, the connecting component 102 also includes a limiting member 1031. Figure 7 A schematic diagram of the structure of the limiting member of the hot-swappable connection device according to an embodiment of the present invention is shown. Figure 1 and Figure 7 As shown, the limiting member 1031 includes an elongated hole 71 and a limiting surface 72. The conductive plate 1021 passes through the elongated hole 71, and the limiting member 1031 is fixed to the conductive plate 1021. The limiting surface 72 of the limiting member 1031 can limit the displacement of the clamping assembly 1022 towards the circuit breaker 20. When the circuit breaker 20 and its load circuit are electrically connected to the busbar 30, the clamping assembly 1022 is inserted into the busbar 30 under the action of thrust. During the insertion process, the busbar 30 will exert a reverse force on the clamping assembly 1022, causing the clamping assembly 1022 to displace in the opposite direction to the busbar 30. By setting the limiting member 1031, the range of movement of the clamping assembly 1022 can be limited, so that the final position of the second clamping part 1028 clamping the conductive plate 1021 can ensure sufficient contact between the two to achieve a stable electrical connection. In addition, during the insertion process, the limiting member 1031 and the clamping assembly 1022 form a contact support, providing the user with a force fulcrum and significantly improving the convenience of the insertion operation.

[0058] This invention also provides a hot-swappable circuit breaker. Figure 8 A schematic diagram of the structure of a circuit breaker according to an embodiment of the present invention is shown. Figure 8 As shown, the circuit breaker 60 includes a circuit breaker body 61 and a connection device 62 according to an embodiment of the present invention. The circuit breaker 60 can be hot-swapped while energized.

[0059] This invention utilizes a hot-swappable connection device to enable hot-swapping of circuit breakers and busbars. This allows for maintenance, replacement, capacity expansion, or commissioning of circuit breakers in the power distribution system without power interruption. It fundamentally avoids the downtime of downstream loads (such as industrial production equipment, data center servers, and critical residential power facilities) caused by traditional power outages, ensuring power continuity and reducing adverse effects such as production losses, data loss, or inconvenience caused by power outages. Furthermore, eliminating the need for a complete power outage reduces the impact of frequent power system starts and stops, preventing voltage fluctuations during startup and shutdown from damaging other equipment within the system and extending the service life of the power distribution system and related equipment.

[0060] In this utility model, unless otherwise stated, the terms "coupling" or "connection" refer to electrical coupling, including direct electrical connection or indirect electrical connection achieved through intermediate components such as resistors, capacitors, inductors, and switches. As long as the connection does not substantially change the core function of this utility model, it falls within the protection scope of this utility model.

[0061] References to "various embodiments," "some embodiments," "one embodiment," or "embodiment," etc., in this specification refer to a specific feature, structure, or property described in connection with the said embodiment, included in at least one embodiment. Therefore, the appearance of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," etc., throughout this specification does not necessarily refer to the same embodiment. Furthermore, specific features, structures, or properties can be combined in any suitable manner in one or more embodiments. Therefore, a specific feature, structure, or property shown or described in connection with one embodiment can be combined, in whole or in part, with features, structures, or properties of one or more other embodiments without limitation, provided that the combination is not illogical or inoperable.

[0062] The terms "comprising," "having," and similar expressions used in this specification are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses. Furthermore, the elements in the accompanying drawings are for illustrative purposes only and are not drawn to scale.

[0063] Although the present invention has been described through preferred embodiments, the present invention is not limited to the embodiments described herein, and includes various changes and variations without departing from the scope of the present invention.

Claims

1. A hot-swappable connection device for connecting a circuit breaker and a busbar, characterized in that, include: An insulating housing includes a first mounting side having a mechanical connection interface and a second mounting side opposite to the first mounting side; wherein the connecting device is mechanically connected to the circuit breaker via the mechanical connection interface, and the second mounting side includes at least one receiving portion having a first opening on the second mounting side and a second opening opposite to the first opening; At least one connecting component is disposed within the housing, each of the at least one connecting component comprising: A conductive plate, including a first end and a second end, the conductive plate extending through a first mounting side, the first end being mechanically connectable to the circuit breaker to form an electrical connection between the conductive plate and the circuit breaker; and A clamping assembly includes a retainer and a clamping module, wherein the retainer has a limiting surface on the side adjacent to the busbar, and the clamping module includes a positioning rivet, a first clamping portion, and a second clamping portion; wherein the first clamping portion and the second clamping portion have different opening angles about the positioning rivet to generate different clamping forces; the first clamping portion clamps the conductive plate to form an electrical connection, and the second clamping portion can clamp the busbar to form an electrical connection; the positioning rivet fixes the clamping module to the retainer; The receiving portion completely accommodates the second clamping portion; The limiting surface and the wall surface where the second opening of the corresponding receiving part is located form a stop to restrict the movement of the clamping assembly in the direction of the busbar.

2. The connecting device according to claim 1, characterized in that, The clamping module includes: At least one pair of contact fingers, each of the at least one pair of contact fingers including a non-clamping side with a groove and a clamping side opposite to the non-clamping side, the clamping sides of each pair of contact fingers being arranged opposite each other with the positioning rivet as the center to form the first clamping portion and the second clamping portion; A spring sheet, comprising a first spring arm and a second spring arm set at a specified angle; The retainer restricts the spring sheet within the groove of each finger, causing the first and second spring arms of the spring sheet to elastically deform, thereby providing clamping force for the first and second clamping portions.

3. The connecting device according to claim 1, characterized in that, Line contact is formed between the first clamping part and the conductive plate, and between the second clamping part and the busbar.

4. The connecting device according to claim 1, characterized in that, The connection device includes one or more connection components corresponding to one or more busbars, and the connection components are staggered relative to each other along the length direction of the one or more busbars.

5. The connecting device according to claim 1, characterized in that, The clamping sides of each pair of fingers are set at a specified distance relative to each other.

6. The connecting device according to claim 1, characterized in that, The retainer restricts the spring sheet to the groove at the connection between the first spring arm and the second spring arm.

7. The connecting device according to claim 1, characterized in that, The specified angle is determined based on the thickness of the busbar.

8. The connecting device according to claim 1, characterized in that, Each pair of the at least one pair of tentacles is arranged side by side.

9. The connecting device according to claim 1, characterized in that, The connection assembly further includes a limiting member fixed to the conductive plate to restrict the movement of the clamping assembly toward the circuit breaker.

10. A circuit breaker, characterized in that, Includes the connecting device as described in any one of claims 1-9.

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