Hot-pluggable connecting device and circuit breaker comprising same

Abstract

The invention provides a hot-pluggable connection device and a circuit breaker comprising the same. The hot-pluggable connection device comprises: an insulating housing comprising a first mounting side and a second mounting side, where the second mounting side comprises at least one receptacle having a first opening on the second mounting side and a second opening opposite the first opening; the at least one connecting assembly is arranged in the shell; each connecting assembly comprises a conductive plate; the clamping assembly comprises a holding piece and a clamping module, the side, close to the bus, of the holding piece is provided with a limiting face, the clamping module comprises a positioning rivet, a first clamping part and a second clamping part, the first clamping part clamps the conductive plate to form electric connection, and the second clamping part can clamp the bus to form electric connection; and the clamping module is fixed on the retainer by the positioning rivet. Wherein the accommodating part completely accommodates the second clamping part; the limiting faces and the wall faces where the second openings of the corresponding containing parts are located form stopping fit so as to limit movement of the clamping assemblies in the bus direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power systems, in particular to a hot-pluggable connection device for connecting a circuit breaker and a busbar. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and can not necessarily constitute prior art.

[0003] As a key protection device of power distribution system, the core function of circuit breaker is to quickly cut off the power supply circuit when detecting abnormal conditions such as overload and short circuit through real-time monitoring of circuit current, thereby protecting the circuit and load device. With reliable protection performance, circuit breakers are widely used in power distribution systems of critical places such as data centers, high-end buildings and hospitals, and play an important role in ensuring safe and stable power transmission.

[0004] During the long-term operation of the power distribution system, affected by factors such as equipment life cycle management, load dynamic change and electrical fault, maintenance personnel need to frequently perform various operations on the circuit breaker to maintain system reliability. Specifically, these operations mainly include: equipment capacity expansion / reduction adaptation, such as replacing the original 25A specification circuit breaker with a 63A circuit breaker to meet the current carrying demand of the newly added load as the IT equipment is upgraded or the business scale is adjusted; emergency handling of faults, when the circuit breaker fails due to internal faults such as arc damage and contact aging, it must be replaced in time to restore the protection function of the circuit; three-phase imbalance adjustment, in order to rebalance the load by adjusting the phase sequence position of the circuit breaker due to the overload of the current of one phase caused by uneven load distribution. However, the current operation of the circuit breaker generally relies on power-off operation - that is, the power supply of the target circuit must be interrupted to disassemble, replace or adjust the phase of the circuit breaker.

[0005] However, in critical places such as data centers, high-end buildings and hospitals where the reliability of electric energy is extremely high, the continuous and stable operation of the power distribution system is directly related to the normal development of core business and the safety of personnel and property, and any interruption of power supply may trigger a chain of risks. Taking a data center as an example, as the data hub and computing core of the information society, its continuous operation is directly related to the stability of the business system and the security of the data assets. If the power supply is interrupted due to the operation of the circuit breaker, it may not only trigger the server cluster to go down, but also may cause data integrity damage due to secondary faults such as data cache loss.

[0006] Therefore, it is urgent to realize the online hot-plugging of the circuit breaker under the premise of ensuring the safety of operation and the stability of the system. SUMMARY

[0007] Therefore, the purpose of the present application is to overcome the defects of the prior art, and to provide a hot-pluggable connection device and a circuit breaker comprising the same.

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

[0009] an insulating housing comprising a first mounting side having a mechanical connection interface and a second mounting side opposite to the first mounting side; wherein the connection device is mechanically connectable to the circuit breaker through the mechanical connection interface, and the second mounting side comprises at least one receiving part having a first opening on the second mounting side and a second opening opposite to the first opening;

[0010] at least one connection assembly arranged in the housing, each of the at least one connection assembly comprising:

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

[0012] a clamping assembly comprising a holder and a clamping module, wherein the holder has a limiting surface on a side adjacent to the busbar, and the clamping module comprises 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 centered on 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 is capable of clamping the busbar to form an electrical connection; and the positioning rivet fixes the clamping module on the holder;

[0013] wherein the receiving part completely receives the second clamping portion;

[0014] the limiting surface forms a stop cooperation with a wall surface where the second opening of the corresponding receiving part is located to limit the movement of the clamping assembly towards the busbar.

[0015] According to the connection device of the present application, the clamping module comprises:

[0016] at least one pair of contact fingers, each of the at least one pair of contact fingers comprising a non-clamping side having a groove and a clamping side opposite to the non-clamping side, and the clamping sides of each pair of the at least one pair of contact fingers are oppositely arranged centered on the positioning rivet 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 arranged at a specified angle;

[0018] The spring sheet is limited in the groove of each contact finger by the retaining member, and the first spring arm and the second spring arm of the spring sheet are elastically deformed, so that the first clamping part and the second clamping part are provided with clamping force.

[0019] According to the connecting device of the present application, the first clamping part and the conductive plate form line contact, and the second clamping part and the bus form line contact.

[0020] According to the connecting device of the present application, the connecting device comprises more than one connecting assembly corresponding to more than one bus, and the connecting assemblies are staggered relative to each other along the length direction of the more than one bus.

[0021] According to the connecting device of the present application, the clamping sides of each pair of contact fingers are oppositely arranged at a specified distance.

[0022] According to the connecting device of the present application, the retaining member limits the spring sheet to the groove at the connection of the first spring arm and the second spring arm.

[0023] According to the connecting device of the present application, the specified angle is determined according to the thickness of the bus.

[0024] According to the connecting device of the present application, each pair of contact fingers in the at least one pair of contact fingers is arranged side by side.

[0025] According to the connecting device of the present application, the connecting assembly further comprises a limiting member fixed on the conductive plate to limit the movement of the clamping assembly to the direction of the circuit breaker.

[0026] According to another aspect of the embodiments of the present application, a circuit breaker is also provided, comprising the connecting device according to the embodiments of the present application.

[0027] The present application provides a hot-pluggable connecting device and a circuit breaker comprising the same. By adopting the hot-pluggable connecting device, the hot plugging of the circuit breaker and the bus can be realized. This makes it unnecessary to power off when the circuit breaker is overhauled, replaced, expanded or debugged in the power distribution system, and can fundamentally avoid the shutdown of downstream loads (such as industrial production equipment, data center servers, and civil key power facilities) caused by the traditional power-off operation, thereby ensuring the continuity of power supply, reducing the production loss, data loss or inconvenience caused by power-off, and the like. At the same time, without the need for overall power-off, the impact of frequent start-stop of the power supply system can be reduced, and the damage of voltage fluctuation in the start-stop process to other devices in the system can be avoided, thereby prolonging the service life of the power distribution system and associated devices. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be further described in connection with the drawings outlined as follows:

[0029] Figure 1 A structural schematic diagram of a hot-pluggable connecting device according to an embodiment of the application is shown;

[0030] Figure 2 A front view and a side view of an insulating shell of a hot-pluggable connecting device according to an embodiment of the application are shown;

[0031] Figure 3 A structural schematic diagram of a clamping assembly of a hot-pluggable connecting device according to an embodiment of the application is shown;

[0032] Figure 4 A structural schematic diagram of a retaining member of a hot-pluggable connecting device according to an embodiment of the application is shown;

[0033] Figure 5 A structural schematic diagram of a contact finger of a hot-pluggable connecting device according to an embodiment of the application is shown;

[0034] Figure 6 A structural schematic diagram of a spring sheet of a hot-pluggable connecting device according to an embodiment of the application is shown;

[0035] Figure 7 A structural schematic diagram of a limiting member of a hot-pluggable connecting device according to an embodiment of the application is shown;

[0036] Figure 8 A structural schematic diagram of a circuit breaker according to an embodiment of the application is shown; DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the application clearer, the application will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments given by the application are only used for illustration, but not limit the protection scope of the application.

[0038] In order to make the objectives, technical solutions and advantages of the application clearer, the application will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments described are part of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0039] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.

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

[0041] Figure 2 A front view and a view along the A direction of the insulating housing of the hot-pluggable connection device according to an embodiment of the application is shown. As shown in Figure 1 and Figure 2 , the insulating housing 101 includes a first mounting side 1011 having a mechanical connection interface and a second mounting side 1012 opposite to the first mounting side 1011. Among them, the connection device 10 is mechanically connected to the circuit breaker 20 through the mechanical connection interface at the first mounting side 1011, and is electrically connected to the busbar 30 through the electrical connection interface at the second mounting side 1012. The second mounting side 1012 includes at least one accommodating portion 1013, and the accommodating portion 1013 has a first opening 1014 at the second mounting side 1012 and a second opening 1015 opposite to the first opening 1014.

[0042] As shown in Figure 1 , 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 the first mounting side 1011, and the first end thereof is mechanically connected to the circuit breaker 20 by, for example, riveting, bolting, etc. 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 structural schematic diagram of a clamping assembly of a hot-pluggable connection device according to an embodiment of the application is shown. As shown in Figure 1 and Figure 3As shown, the clamping assembly 1022 includes a holder 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 with the positioning rivet 1026 as the center 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 on the holder 1023. The holder 1023 has a limiting surface 1025 on the side close to the busbar 30.

[0044] As shown in Figure 1 and Figure 3 , the accommodating portion 1013 of the insulating shell 101 completely accommodates the second clamping portion 1028. The limiting surface 1025 of the holder 1023 and the wall surface 1016 where the second opening 1015 of the corresponding accommodating portion 1013 is located form a stop cooperation to limit the movement of the clamping assembly 1022 towards the busbar 30.

[0045] In some embodiments of the present application, the clamping module 1024 includes at least one pair of contact fingers 9. Figure 5 A structural schematic diagram of a contact finger of a hot-pluggable connection device according to an embodiment of the present application is shown. As shown in Figure 1 and Figure 5 , the contact 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 contact fingers 9 are oppositely arranged with the positioning rivet 1026 as the pivot to form the first clamping portion 1027 and the second clamping portion 1028.

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

[0047] In some embodiments of the present application, the specified angle a can be determined according to the thickness of the busbar 30. And by adjusting the size of the specified angle a, the clamping forces provided by the first clamping portion 1027 and the second clamping portion 1028 can be changed to better achieve the hot-pluggable function of the connection device.

[0048] Figure 4 A structural schematic diagram of a holder of a hot-pluggable connection device according to an embodiment of the present application is shown. As shown inFigure 4 As shown, the retaining member 1023 has a first side wall 41, a second side wall 42, and a bottom wall 43 connecting the first side wall 41 and the second side wall 42. The bottom wall 43 includes an opening 44, a first crossbeam 45, and a second crossbeam 46. The first side wall 41 and the second side wall 42 have a through hole 48.

[0049] like Figures 1-6 As shown, the clamping module 1024 passes through the opening 44 of the retaining member 1023 and, through the first crossbeam 45 and second crossbeam 46 of the retaining member 1023, respectively, restrains the spring piece 8 in the groove 93 of each contact finger 9. The first crossbeam 45 and second crossbeam 46 compress the spring piece 8, causing the first spring arm 81 and second spring arm 82 to elastically deform, providing clamping force for the first clamping portion 1027 and second clamping portion 1028. Simultaneously, the positioning rivet 1026 passes through the through hole 48 and is riveted to the retaining member 1023, securing the clamping module 1024 within the opening 44.

[0050] In some embodiments of the present invention, Figure 3 As shown, each pair of at least one pair of contact fingers 9 is arranged side by side, perpendicular to the first beam 45 and the second beam 46. By replacing a single pair of contact fingers with the same conductive cross-sectional area as the multiple pairs of contact fingers with multiple pairs of contact fingers, the surface area of ​​the conductor can be significantly increased at the same current carrying capacity, thereby dispersing the skin distribution depth of high-frequency current. In particular, under high-frequency or high-current conditions, this can significantly reduce losses caused by current concentration on the conductor surface due to the skin effect, improving the overall efficiency of current transmission and conductive performance. Furthermore, the multi-contact finger side-by-side structure enhances heat dissipation, disperses localized heat generation, reduces temperature rise caused by concentrated heat generation, and ensures the stability and reliability of the contact fingers during long-term operation.

[0051] In some embodiments of the present invention, line contact is formed between the first clamping portion 1027 and the conductive plate 1021, and between the second clamping portion 1028 and the busbar 30. Line contact can significantly increase the contact area compared to point contact, and its contact pressure is more concentrated than that of surface contact. This can effectively reduce contact resistance, reduce energy loss during current transmission, and reduce localized heat generation caused by loss, making it particularly suitable for high-current scenarios. In addition, line contact can better adapt to minor mechanical vibrations and thermal expansion, maintain stable electrical contact performance, and further enhance the durability and adaptability of the system.

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

[0053] In some embodiments of the present application, the retaining member 1023 limits the spring sheet 8 to the groove 93 at the connection of the first spring arm 81 and the second spring arm 82. Specifically, the retaining member 1023 presses down the first spring arm 81 and the second spring arm 82 at the connection, which can make the first spring arm 81 and the second spring arm 82 be forced evenly, thereby generating stable elastic deformation.

[0054] In embodiments of the present application, the number of the connection assemblies 102 included in the hot-pluggable connection device 10 is related to the number of phases of the power distribution system to which the hot-pluggable connection device 10 is applied. For example, in a three-phase power distribution system, the hot-pluggable connection device 10 can include three connection assemblies 102. When the connection device 10 includes more than one connection assembly 102 corresponding to more than one busbar 30, the connection assemblies 102 are arranged staggered relative to each other along the length direction of the more than one busbar 30. In this way, the size of the hot-pluggable connection device 10 can be effectively reduced.

[0055] In some embodiments of the present application, when the circuit breaker 20 and the load circuit carried thereby are connected to the busbar 30, the connection assembly 102 in the hot-pluggable connection device 10 is first installed to the circuit breaker 20 (i.e. the mechanical connection and the electrical connection between the two are completed); then the insulating shell 101 is installed to the outside of the connection assembly 102, and the insulating shell 101 is mechanically connected to the circuit breaker 20 at the first installation side 1011 of the insulating shell 101, for example, by bolt connection; in this way, the hot-pluggable connection device 10 and the circuit breaker 20 are firmly connected as a whole; then the entrance of the second clamping portion 1028 is brought into contact with the busbar 30, and the hot-pluggable connection device 10 or the circuit breaker 20 is pushed towards the busbar 30 until the second clamping portion 1028 reliably clamps the busbar 30 and the hot-pluggable connection device 10 or the circuit breaker 20 cannot be pushed towards the busbar 30 any more. The above process does not require power-off, and the electrical connection between the circuit breaker 20 and the load circuit carried thereby and the busbar 30 can be safely and reliably achieved.

[0056] In embodiments of the present application, the process of disconnecting the electrical connection between the circuit breaker 20 and the load circuit carried thereby and the busbar 30 is as follows: first, the circuit breaker 20 is pulled towards the direction away from the busbar 30, and the insulating shell 101 of the hot-pluggable connection device 10 is moved in the same direction. Since the retaining member 1023 is in stop cooperation with the wall surface 1016 on which the second opening 1015 of the accommodating portion 1013 in the insulating shell 101 is located, the insulating shell 101 will drive the connection assembly 102 to move towards the direction away from the busbar 30 until the connection assembly 102 is completely separated from the busbar 30. The above process also does not require power-off, and the electrical connection between the circuit breaker 20 and the load circuit carried thereby and the busbar 30 can be safely disconnected.

[0057] In some embodiments of the present application, as shown inFigure 1 As shown, the connecting assembly 102 further comprises a limiting member 1031. Figure 7 A structural diagram of a limiting member of a hot-pluggable connecting device according to an embodiment of the present application is shown. As shown in the figure, Figure 1 and Figure 7 As shown, the limiting member 1031 comprises a long hole 71 and a limiting surface 72. The conductive plate 1021 passes through the long hole 71, and the limiting member 1031 is fixed on the conductive plate 1021. The limiting surface 72 of the limiting member 1031 can limit the displacement of the clamping assembly 1022 in the direction of the circuit breaker 20. When the circuit breaker 20 and its load circuit are electrically connected with the busbar 30, the clamping assembly 1022 is inserted in the direction of the busbar 30 under the action of the thrust, and the busbar 30 will exert a reverse force on the clamping assembly 1022 during the insertion process, causing the clamping assembly 1022 to displace in the direction opposite to the busbar 30. By setting the limiting member 1031, the movement range of the clamping assembly 1022 can be limited, so that the position where the second clamping part 1028 finally clamps the conductive plate 1021 can ensure that the two are in sufficient contact to achieve stable electrical connection. In addition, during the insertion process, the limiting member 1031 and the clamping assembly 1022 form a resistance support, providing a force application fulcrum for the user, significantly improving the convenience of the insertion operation.

[0058] The present application also provides a hot-pluggable circuit breaker. Figure 8 A structural diagram of a circuit breaker according to an embodiment of the present application is shown. As shown in the figure, Figure 8 As shown, the circuit breaker 60 comprises a circuit breaker body 61 and a connecting device 62 according to an embodiment of the present application. The circuit breaker 60 can be hot-plugged in the live state.

[0059] The present application can achieve hot plugging of the circuit breaker and the busbar by using the hot-pluggable connecting device. This makes it possible to carry out maintenance, replacement, expansion or debugging of the circuit breaker in the power distribution system without power failure, which can fundamentally avoid the downtime of downstream loads (such as industrial production equipment, data center servers, and civil key power facilities) caused by traditional power failure, ensuring power continuity, thereby reducing production loss, data loss or inconvenience of life caused by power failure. At the same time, without overall power failure, the impact of frequent start-stop of the power supply system can be reduced, and the damage of voltage fluctuation during start-stop to other devices in the system can be avoided, prolonging the service life of the power distribution system and associated devices.

[0060] In the present application, unless otherwise specified, the term "coupling" or "connection" refers to electrical coupling, including direct electrical connection or indirect electrical connection through intermediate elements such as resistors, capacitors, inductors, switches, etc., as long as the connection does not substantially change the core function of the present application, which belongs to the protection scope of the present application.

[0061] Reference throughout this specification to "various embodiments", "some embodiments", "one embodiment", or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in various embodiments", "in some embodiments", "in one embodiment", or "in an embodiment" in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Thus, the disclosure, including each of the individual embodiments, teaches combinations of features, structures, or properties that can be expressed as specific claims.

[0062] As used in this specification and claims, the terms "for example," "for instance," "such as," and "like," and the phrases "for example only" and "such as only," mean "by way of example." Thus, the phrases "for example only" and "such as only" do not mean "by way of limitation."

[0063] While the application has been described by way of preferred embodiments, it should be understood that the application is not limited by the embodiments described and that variations and modifications can be made without departing from the scope of the application.

Claims

1. A hot-pluggable connection device for connecting a circuit breaker and a busbar, comprising: An insulating housing comprising a first mounting side having a mechanical connection interface and a second mounting side opposite the first mounting side; wherein the connection device is mechanically connectable to the circuit breaker via the mechanical connection interface, and the second mounting side comprises at least one receiving portion, the receiving portion having a first opening on the second mounting side and a second opening opposite the first opening; At least one connecting assembly is provided in the housing, each of the at least one connecting assembly comprising: a conductive plate including 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; and A clamping assembly includes a retaining member and a clamping module, wherein the retaining member has a limiting surface on a 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 with the positioning rivet as the center 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 secures the clamping module to the retaining member; wherein the accommodating portion completely accommodates the second clamping portion; The limiting surface and the wall surface of the corresponding accommodating portion where the second opening is located form a stop fit to limit the movement of the clamping assembly in the direction of the busbar.

2. The connection device according to claim 1, wherein The clamping module comprises: at least one pair of contact fingers, each of the at least one pair of contact fingers comprising a non-clamping side having a groove and a clamping side opposite to the non-clamping side, the clamping sides of each pair of contact fingers being arranged opposite to each other with the positioning rivet as a 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 disposed at a specified angle; The retaining member restricts the spring sheet in the groove of each contact finger and causes the first spring arm and the second spring arm of the spring sheet to generate elastic deformation, thereby providing clamping force for the first clamping portion and the second clamping portion.

3. The connection device according to claim 1, wherein: Line contact is formed between the first clamping portion and the conductive plate, and between the second clamping portion and the busbar.

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

5. The connection device according to claim 1, wherein The clamping sides of each pair of contact fingers are arranged opposite to each other at a specified distance.

6. The connection device according to claim 1, wherein The retainer constrains the spring leaf to the groove at the connection of the first spring arm and the second spring arm.

7. The connection device according to claim 1, wherein: The designated angle is determined according to the thickness of the generatrix.

8. The connection device according to claim 1, wherein: Each pair of the at least one pair of contact fingers is arranged side by side.

9. The connection device according to claim 1, wherein: The connecting assembly further includes a limiting member, which is fixed on the conductive plate to limit the movement of the clamping assembly toward the circuit breaker.

10. A circuit breaker comprising the connecting device according to any one of claims 1 to 9.

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