Residual current protection circuit breaker

Abstract

A residual current protection circuit breaker comprises a monitoring module, a control module and a circuit breaker module, the circuit breaker module comprises at least one circuit breaker unit arranged side by side, the monitoring module comprises a zero sequence current transformer, a wiring structure and an electricity taking structure, and the control module is electrically connected with the electricity taking structure. The wiring structure is arranged corresponding to the circuit breaker unit, two ends of the wiring structure are respectively used for connecting the corresponding circuit breaker unit and an external lead, the middle part of the wiring structure passes through the zero sequence current transformer, the control module comprises a circuit board, and the zero sequence current transformer is electrically connected with the circuit board and is used for transmitting a collected current residual signal. The monitoring module is provided with an elastic part connected with the power taking structure and / or the zero sequence current transformer, the elastic part is provided with a contact part used for being connected with the circuit board, the contact part is perpendicular to the circuit board, and the elastic part drives the contact part to be tightly pressed with the circuit board, so that the assembly steps are saved, and the assembly difficulty can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a residual current protection circuit breaker. Background Technology

[0002] Low-voltage circuit breakers are used to distribute electrical energy and protect lines and power equipment from overload and short circuits. They can also be used for infrequent switching of lines and infrequent starting of motors. With the continuous development of IoT and AI technologies, miniaturization and modularization of circuit breakers have become a trend.

[0003] However, in the existing technology, the installation structure of the residual current monitoring module and the residual current control module of the residual current operated circuit breaker is complicated, which not only makes the assembly difficult, but also makes it difficult to achieve automated assembly production. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one defect of the prior art and provide a residual current protection circuit breaker.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A residual current circuit breaker includes a monitoring module, a control module, and a circuit breaker module. The circuit breaker module includes at least one circuit breaker unit arranged side-by-side. The monitoring module includes a zero-sequence current transformer, a wiring structure, and a power-taking structure. The wiring structure is configured corresponding to the circuit breaker unit, with its two ends used to connect to the corresponding circuit breaker unit and an external conductor, respectively. The middle of the wiring structure passes through the zero-sequence current transformer. The control module includes a circuit board electrically connected to the power-taking structure. The zero-sequence current transformer is electrically connected to the circuit board for transmitting the collected residual current signal.

[0007] The monitoring module is provided with an elastic part that is connected to the power supply structure and / or a zero-sequence current transformer. The elastic part is provided with a contact part for connecting to the circuit board. The elastic part drives the contact part to press against the circuit board.

[0008] Preferably, the number of power-taking structures corresponds to the number of circuit breaker units. The power-taking structure is connected to the wiring structure connected to the corresponding circuit breaker unit. The control module draws power from the circuit breaker module through the power-taking structure. The power-taking structure is provided with a first elastic part as an elastic part. The first elastic part is provided with a first contact part as a contact part. The circuit board can abut against the first contact part, so that the first contact part pushes the first elastic part, and the first elastic part drives the first contact part to press against the circuit board.

[0009] Preferably, the zero-sequence current transformer has two second elastic parts as elastic parts, which are respectively connected to the two ends of the winding of the zero-sequence current transformer. The second elastic parts have second contact parts as contact parts. The circuit board can push the second contact parts to compress the second elastic parts. The second elastic parts drive the second contact parts to press against the circuit board, thereby enabling the circuit board to collect current signals through the zero-sequence current transformer.

[0010] Preferably, the power-taking structure includes a third elastic part and a support part connected between the third elastic part and the first elastic part. The wiring structure can compress the third elastic part of the corresponding power-taking structure, so that the third elastic part and the wiring structure are pressed together.

[0011] Preferably, the third elastic part is in the shape of a cylindrical spring.

[0012] Preferably, the monitoring module is provided with a spring post, and the third elastic part is sleeved on the spring post.

[0013] Preferably, the elastic part and the contact part are elastic rods, the contact part is bent and connected to the elastic part, and the contact part is arranged perpendicular to the circuit board.

[0014] Preferably, the circuit board has multiple positioning grooves spaced apart on its side, the contact portion extends into the positioning groove, and the sidewall of the positioning groove is provided with a conductive layer.

[0015] Preferably, the monitoring module includes a monitoring housing, which includes a first monitoring side plate and a second monitoring side plate spaced apart. The zero-sequence current transformer, wiring structure, and power supply structure are disposed between the first monitoring side plate and the second monitoring side plate. The second monitoring side plate includes a circuit breaker area corresponding to the circuit breaker module and a control module area corresponding to the control module. The control module area is provided with a second monitoring wiring hole, and the second monitoring wiring hole is provided with multiple contact parts.

[0016] Preferably, the wiring structure includes a circuit breaker wiring section for connecting the circuit breaker terminals, a monitoring wiring section for fixing external conductors, and a conductive section connecting the circuit breaker wiring section and the monitoring wiring section. The conductive section passes through a zero-sequence current transformer. The circuit breaker area is provided with a plurality of first monitoring wiring holes at intervals. The circuit breaker wiring section extends from the monitoring wiring holes and connects to the terminals of the circuit breaker unit. The plurality of first monitoring wiring holes are arranged along the width direction of the circuit breaker unit, and a plurality of contact parts in the second monitoring wiring holes are arranged along the height direction of the circuit breaker unit.

[0017] Preferably, the first monitoring wiring hole is provided with a plurality of support bosses of different heights, and the support bosses are provided with limiting grooves for limiting the elastic part.

[0018] Preferably, the monitoring housing includes a monitoring base plate and a monitoring top plate spaced apart, the first monitoring side plate and the second monitoring side plate are located between the monitoring base plate and the monitoring top plate, the monitoring housing is also provided with monitoring wiring terminals, the monitoring wiring part is inserted into the monitoring wiring terminals, the first monitoring side plate is provided with monitoring wiring holes for inserting external wires, and the monitoring top plate is provided with wiring operation holes.

[0019] Preferably, the monitoring module includes multiple power-taking structures, wherein the first elastic portions of the multiple power-taking structures are misaligned along the projection of the circuit breaker unit in the height direction, and at least one of the first contact portions has an extension portion, such that the length of the first contact portion is different from that of the other first contact portions, and the extension portion and the projection of the other first contact portions along the height direction of the circuit breaker unit have an overlapping portion.

[0020] Preferably, the power-taking structure is provided with a third elastic part connected to the wiring structure, the monitoring wiring part compresses the third elastic part of the corresponding power-taking structure, the monitoring wiring parts of multiple wiring structures are located on the same plane, and the length of the third elastic part of at least one power-taking structure is different from that of the third elastic parts of other power-taking structures.

[0021] Preferably, the monitoring module has a limiting side plate between the support parts of two adjacent power-taking structures, and the limiting side plate is used to insulate and limit the support parts on both sides.

[0022] Preferably, the axis of the third elastic part is perpendicular to the plane containing the first elastic part and the contact part.

[0023] Preferably, the zero-sequence current transformer has an isolation structure in the middle, which is used to isolate the conductive parts of multiple wiring structures.

[0024] Preferably, the monitoring module includes four wiring structures, wherein the conductive parts of three wiring structures are integrally formed with their respective circuit breaker wiring parts and monitoring wiring parts, and the conductive part of the other wiring structure is a flexible connection connecting the circuit breaker wiring part and the monitoring wiring part. The isolation structure includes three partitions, one of which is connected between one end of the other two partitions. The inner sides of the three partitions form a space for the flexible connection to pass through, and the outer sides of the three partitions are respectively provided with limiting grooves for limiting the conductive parts of the other three power-taking structures.

[0025] The residual current circuit breaker of this utility model has a monitoring module with an elastic part that connects to the power supply structure and / or zero-sequence current transformer. The elastic part drives the contact part to press against the circuit board of the control module. This not only saves the step of separately connecting the control module to the power supply structure and / or zero-sequence current transformer, but also eliminates the need for complex processes such as welding, effectively reducing assembly difficulty and facilitating automated assembly design.

[0026] In addition, the circuit board has multiple positioning grooves spaced apart on its side, and the sidewalls of the positioning grooves are provided with conductive layers, which facilitates the alignment of the circuit board with the contact parts, reduces the difficulty of assembly, and can also limit the contact parts after assembly.

[0027] Furthermore, the elastic part and the contact part are elastic rods, and the contact part is bent and connected to the elastic part. The contact part is set perpendicular to the circuit board, which results in a simple structure and low cost.

[0028] Specifically, the monitoring module adopts a modular design. The monitoring housing contains a zero-sequence current transformer, a wiring structure, and a power supply structure. The second monitoring side plate of the monitoring housing corresponds to the control module area of ​​the control module. The control module area has a second monitoring wiring hole, which contains multiple first and second contact parts as contact parts. After the control module and the circuit breaker module are spliced ​​together, the monitoring module can be inserted and assembled from one end of the control module and the circuit breaker module. The connection between the monitoring module and the circuit breaker unit and the control module does not require welding, which greatly improves the assembly efficiency.

[0029] Furthermore, the power-gathering structure includes a third elastic part that connects to the wiring structure, eliminating the need for soldering inside the monitoring module.

[0030] Furthermore, the third elastic part is in the shape of a cylindrical spring and is located between the support part and the corresponding wiring structure. The wiring structure can push and compress the third elastic part along the axial direction of the spring column, which has the characteristics of simple structure and reliable connection. In addition, a space for the flexible connection to pass through is formed on the inner side of the three partitions, and limiting grooves for limiting the conductive parts of the other three power-taking structures are respectively provided on the outer side of the three partitions. The four sets of wiring structures can be separated by the isolation structure. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the residual current protection circuit breaker of this utility model;

[0032] Figure 2 This is a schematic diagram showing the cooperation between the monitoring module and the control module of this utility model;

[0033] Figure 3 This is a utility model Figure 2 A magnified view of a portion of the image;

[0034] Figure 4 This is a utility model Figure 2 Top view;

[0035] Figure 5 This is a schematic diagram of the cooperation between the third elastic element and the wiring structure of this utility model;

[0036] Figure 6 This is a structural schematic diagram of the third elastic element of this utility model;

[0037] Figure 7 This is another structural schematic diagram of the third elastic element of this utility model;

[0038] Figure 8 This is a schematic diagram of the control module of this utility model;

[0039] Figure 9 This is a schematic diagram of the monitoring module of this utility model;

[0040] Figure 10 This is a schematic diagram of the monitoring housing of the monitoring module of this utility model;

[0041] Figure 11 This is a schematic diagram of the wiring structure and the cooperation structure of the zero-sequence current transformer of this utility model;

[0042] Figure 12 This is a utility model Figure 11 Exploded view;

[0043] In the picture:

[0044] 1 monitoring module 62 limit slots

[0045] 2 Control Module 101 First Monitoring Side Panel

[0046] 3 Circuit breaker module 102 Second monitoring side plate

[0047] 4. Elastic part 103 First monitoring wiring hole

[0048] 5. Contact part 104 Second monitoring wiring hole

[0049] 6. Isolation structure 105 Third monitoring wiring hole

[0050] 11 Wiring structure, 106 wiring operation holes

[0051] 12 Power supply structure 111 Circuit breaker wiring section

[0052] 13 Zero-sequence current transformer 112 Monitoring wiring section

[0053] 14 Limiting side plate 113 Conductive part

[0054] 15 Support Bosses, 120 Support Sections

[0055] 16 limiting grooves 121 first power extraction structure

[0056] 21 Circuit Board 122 Second Power Supply Structure

[0057] 22 Residual current trip unit 123 Third power supply structure

[0058] 23 Unlocking component 124 Fourth power supply structure

[0059] 41 First elastic part 211 Positioning groove

[0060] 42 Second elastic section 301 First circuit breaker unit

[0061] 43 Third Flexible Section 302 Second Circuit Breaker Unit

[0062] 51 First Contact Part 303 Third Circuit Breaker Unit

[0063] 52 Second Contact Section 304 Fourth Circuit Breaker Unit

[0064] 61 partition 430 spring column Detailed Implementation

[0065] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the residual current protection circuit breaker of this utility model. The residual current protection circuit breaker of this utility model is not limited to the descriptions in the following embodiments.

[0066] like Figures 1-4 As shown, the residual current circuit breaker in this embodiment includes a monitoring module 1, a control module 2, and a circuit breaker module 3. The control module 2 and the monitoring module 1 are detachably connected to the circuit breaker module 3. The circuit breaker module 3 includes at least one circuit breaker unit arranged side by side. The control module 2 collects and judges the residual current of the circuit breaker module 3 through the monitoring module 1. When the residual current meets the action threshold, the control module 2 drives the multiple circuit breaker units to disconnect, thereby realizing the residual current protection function. The control module 2 and the circuit breaker units of the circuit breaker module 3 are arranged side by side, and the monitoring module 1 is located at the same end of the control module 2 and the circuit breaker module 3.

[0067] Specifically, the circuit breaker unit includes a moving contact, a stationary contact, a short-circuit trip unit, an overload trip unit, and an operating mechanism (not shown in the figure), as well as two terminals corresponding to the moving and stationary contacts. The stationary and moving contacts are connected to the corresponding terminals and connected to the circuit via the short-circuit trip unit and the overload trip unit, respectively. The operating mechanism can drive the moving contact to contact and separate from the stationary contact to conduct and disconnect the connected circuit. The handles of multiple circuit breaker units are linked, driving multiple circuit breaker units to close and open synchronously. The operating mechanisms of multiple circuit breaker units are linked, and when the operating mechanism of any circuit breaker unit trips, it can drive the operating mechanisms of all circuit breaker units to trip. The short-circuit trip unit and the overload trip unit trigger the operating mechanism to trip when the short-circuit current and overload current pass, respectively, causing the operating mechanisms of all circuit breaker units to drive the moving contact to separate from the stationary contact and disconnect all circuits, thereby realizing the functions of short-circuit protection and overload protection.

[0068] like Figure 8 As shown, the control module 2 includes a circuit board 21, a residual current trip unit 22, and an unlocking component 23. The circuit board 21 is connected to the monitoring module 1 and is used to detect whether a leakage fault has occurred. When the residual current meets the action threshold, the residual current trip unit 22 is driven to push the unlocking component 23 to act, so that the unlocking component 23 drives the operating mechanism of the adjacent circuit breaker unit to trip, and through the operating mechanism of the circuit breaker unit, drives the operating mechanism of other circuit breaker units to trip, and disconnects all lines.

[0069] The control module 2 includes a control housing, with the circuit board 21 positioned in the center of the housing. The plane of the circuit board 21 is parallel to the circuit breaker unit. The residual current trip unit 22 and the unlocking element 23 are located above the circuit board 21 (on the left side of the figure). A test circuit and a test button are also provided inside the control housing. The test circuit passes through the zero-sequence current transformer 13. The test button is used to activate the test circuit to generate a simulated leakage current signal, used to detect whether the residual current protection function of the residual current circuit breaker is normal. Figure 2 , 11 As shown, the monitoring module 1 includes a wiring structure 11, a power supply structure 12, and a zero-sequence current transformer 13. The power supply structure 12 is electrically connected to the circuit board 21 to supply power to the control module 2. The number of wiring structures 11 corresponds to the number of circuit breaker units. The two ends of the wiring structure 11 are used to connect the corresponding circuit breaker unit and the external conductor (not shown in the figure), respectively. The middle part of the wiring structure 11 passes through the zero-sequence current transformer 13. The zero-sequence current transformer 13 is electrically connected to the circuit board 21 to transmit the collected residual current signal. The residual current signal of the circuit breaker module 3 collected by the zero-sequence current transformer 13 is sent to the control module 2. The control module 2 determines whether the threshold for residual current operation is met based on the current signal collected by the zero-sequence current transformer 13.

[0070] An improvement in this embodiment is that the control module 2 includes a circuit board 21, and the monitoring module 1 is provided with an elastic part 4 connected to the power supply structure 12 and / or the zero-sequence current transformer 13. The elastic part 4 is provided with a contact part 5 for connecting the circuit board 21. The circuit board 21 can push the contact part 5 to compress the elastic part 4, and the elastic part 4 drives the contact part 5 to press against the circuit board 21.

[0071] In this embodiment, the residual current circuit breaker monitoring module 1 is equipped with an elastic part 4 connected to the power-taking structure 12 and / or the zero-sequence current transformer 13. The elastic part 4 drives the contact part 5 to press against the circuit board 21 of the control module 2. This not only saves the step of separately connecting the control module 2 to the power-taking structure 12 and / or the zero-sequence current transformer 13, but also eliminates the need for complex processes such as welding, effectively reducing assembly difficulty and facilitating automated assembly design. In this embodiment, the control module 2 draws power from the circuit breaker module 3 via the power-taking structure 12; the control module 2 can also draw power directly from the circuit breaker module 3, both of which fall within the protection scope of this utility model.

[0072] like Figure 1 , 2 As shown in Figures 9 and 10, the monitoring module 1 includes a monitoring housing, which includes a first monitoring side plate 101 and a second monitoring side plate 102 spaced apart. The zero-sequence current transformer 13, the wiring structure 11, and the power extraction structure 12 are disposed between the first monitoring side plate 101 and the second monitoring side plate 102.

[0073] The wiring structure 11 includes a circuit breaker wiring section 111 for connecting the circuit breaker terminals, a monitoring wiring section 112 for fixing external conductors, and a conductive section 113 connecting the circuit breaker wiring section 111 and the monitoring wiring section 112, the conductive section 113 passing through a zero-sequence current transformer 13.

[0074] The second monitoring side panel 102 includes a circuit breaker area corresponding to the circuit breaker module and a control module area corresponding to the control module 2. The circuit breaker area is provided with a plurality of first monitoring wiring holes 103 spaced apart. Circuit breaker wiring portions 111 extend from the monitoring wiring holes and connect to the wiring terminals of the circuit breaker unit. The control module area is provided with second monitoring wiring holes 104. The second monitoring wiring holes 104 are provided with a plurality of first contact portions 51 and second contact portions 52 serving as contact portions 5. The plurality of first monitoring wiring holes 103 are arranged along the width direction of the circuit breaker unit, and the plurality of contact portions 5 are arranged along the height direction of the circuit breaker unit. Preferably, the contact portions 5 are arranged perpendicular to the circuit board 21.

[0075] Preferably, the first monitoring wiring hole 103 is provided with a plurality of support bosses 15 of different heights, and the support bosses 15 are provided with limiting grooves 16 for limiting the elastic part 4. Preferably, the elastic part 4 and the contact part 5 are elastic rods, and the contact part 5 is bent and connected to the elastic part 4. The contact part 5 is set perpendicular to the circuit board 21, which is simple in structure and low in cost. Of course, the contact part 5 can also be set at an angle relative to the circuit board 21, especially after being compressed by the circuit board 21, it is usually not completely perpendicular.

[0076] The monitoring housing includes a monitoring base plate and a monitoring top plate spaced apart. A first monitoring side plate 101 and a second monitoring side plate 102 are located between the monitoring base plate and the monitoring top plate. The monitoring housing also includes monitoring terminals, into which a monitoring wiring portion 112 is inserted. The first monitoring side plate 101 has a third monitoring wiring hole 105 for inserting external wires. The monitoring top plate has a wiring operation hole 106. Preferably, in this embodiment, the monitoring top plate covers the top side of the monitoring module 1, and simultaneously covers the top sides of the control module 2 and the circuit breaker module 3 at the connection point with the monitoring module 1, forming a unified structure that is more aesthetically pleasing. Alternatively, the monitoring top plate can be divided into multiple pieces, each covering the monitoring module 1, and the connection points of the control module 2 and the circuit breaker module 3 to the monitoring module 1, respectively.

[0077] like Figure 3 As shown, preferably, the circuit board 21 has a positioning groove 211 for limiting the contact part 5 on the side near the monitoring module 1. The contact part 5 extends into the positioning groove 211, and the side wall of the positioning groove 211 is provided with a conductive layer. The positioning groove 211 facilitates the alignment of the circuit board 21 and the contact part 5, reduces the difficulty of assembly, and can also serve to limit the contact part 5 after assembly. Preferably, the positioning groove 211 is arc-shaped, but it can also be U-shaped or rectangular, etc. As another inferior embodiment, the side of the circuit board 21 may not have a positioning groove 211, but instead has multiple spaced conductive layers, which will of course result in lower reliability.

[0078] In another embodiment of circuit board 21, a second circuit board is also provided within the monitoring module 1. The second circuit board is perpendicularly connected to the side of circuit board 21 near the monitoring module 1, and the contact portion 5 is electrically connected to the circuit board 21 through the second circuit board. Thus, the contact portion 5 can also be in the shape of a cylindrical spring. However, this embodiment requires the provision of a second circuit board, which increases the complexity of the contact portion 5, and increases manufacturing difficulty and cost.

[0079] With the configuration of monitoring module 1 and control module 2 in this embodiment, after the control module 2 is spliced ​​with the circuit breaker module 3, the monitoring module 1 is then inserted and assembled from one end of the control module 2 and the circuit breaker module 3. The circuit breaker wiring part 111 of the wiring structure 11 of the monitoring module 1 is inserted into the wiring terminal of the corresponding circuit breaker unit, and the contact part 5 of the monitoring module 1 extends into the positioning groove 211 to achieve electrical connection. The monitoring housing of the monitoring module 1 is fixedly connected to the housing of the circuit breaker unit and / or the control module 2. The connection between the monitoring module 1 and the circuit breaker unit and the control module 2 does not require welding, which greatly improves the assembly efficiency.

[0080] like Figures 2-5As shown, the number of power-taking structures 12 corresponds to the number of circuit breaker units. The power-taking structure 12 is connected to the wiring structure 11 connected to the corresponding circuit breaker unit. The power-taking structure 12 is provided with a first elastic part 41 as an elastic part 4. The first elastic part 41 is provided with a first contact part 51 as a contact part 5. The first contact part 51 is arranged perpendicularly to the circuit board 21. The circuit board 21 can abut against the first contact part 51, so that the first contact part 51 pushes the first elastic part 41. The first elastic part 41 drives the first contact part 51 to press against the circuit board 21, thereby allowing the circuit board 21 to draw power from the circuit breaker unit through the power-taking structure 12 and the wiring structure 11.

[0081] In this embodiment, the first contact portion 51 is in the shape of a straight rod. In other embodiments, the first elastic portion 41 can also be an elastic part of other shapes, such as a spring arranged parallel to the circuit board 21, which is directly pushed and compressed by the circuit, or a spring sheet, one end of which is connected to the first elastic portion 41 and the other end is used to contact the circuit board 21. All of these are within the protection scope of this utility model.

[0082] like Figures 2-5 As shown, the zero-sequence current transformer 13 is provided with two second elastic parts 42 as elastic parts 4. The two second elastic parts 42 are respectively connected to the two ends of the winding of the zero-sequence current transformer 13. The second elastic parts 42 are provided with second contact parts 52 as contact parts 5. The second contact parts 52 are arranged perpendicularly to the circuit board 21. The circuit board 21 can push the second contact parts 52 to compress the second elastic parts 42. The second elastic parts 42 drive the second contact parts 52 to press against the circuit board 21, thereby enabling the circuit board 21 to collect current signals through the zero-sequence current transformer 13.

[0083] like Figure 2 , 5 As shown in Figure 7, the power-taking structure 12 includes a third elastic part 43 and a support part 120 connected between the third elastic part 43 and the first elastic part 41. The third elastic part 43 is correspondingly provided with the wiring structure 11. During the installation of the wiring structure 11 into the monitoring module 1, it can push and compress the third elastic part 43 of the corresponding power-taking structure 12, so that the third elastic part 43 and the wiring structure 11 are pressed tightly together. When the wiring structure 11 is installed into the monitoring module 1, the wiring structure 11 contacts the third elastic part 43 and compresses the first elastic part 41, so that the contact part 5 is pressed tightly against the circuit board 21 under the drive of the first elastic part 41, thereby realizing a reliable connection between the power-taking structure 12 and the circuit board 21. Thus, the monitoring module 1 in this embodiment does not require soldering.

[0084] Furthermore, the third elastic part 43 is in the shape of a cylindrical spring. The third elastic part 43 is located between the support part 120 and the corresponding wiring structure 11. The monitoring module 1 includes a monitoring housing, in which a spring post 430 is provided. The third elastic part 43 is sleeved on the spring post 430. The wiring structure 11 can push and compress the third elastic part 43 along the axial direction of the spring post 430, which has the characteristics of simple structure and reliable connection.

[0085] Preferably, the bottom of the spring post 430 is provided with a fixing seat, which is used to limit the end of the third elastic part 43 away from the wiring structure 11. The fixing seat can be a cylindrical, cross-shaped, or other shaped boss structure. The fixing seat can also be provided with an annular groove to limit the cylindrical spring. Of course, the fixing seat can also be omitted, and the spring post 430 can be directly set on the monitoring housing, and the monitoring housing can limit the end of the third elastic part 43 away from the wiring structure 11. All of these are within the protection scope of this utility model.

[0086] Furthermore, the axis of the third elastic part 43 is perpendicular to the plane containing the first elastic part 41 and the contact part 5.

[0087] like Figure 9 As shown, the first elastic portions 41 of the plurality of power-taking structures 12 are staggered along the projection of the circuit breaker unit. At least one of the first contact portions 51 has an extension portion, so that the length of the first contact portion 51 is different from that of the other first contact portions 51. The projection of the extension portion and the other first contact portions 51 along the projection of the circuit breaker unit overlaps. The circuit board 21 is correspondingly arranged with the overlapping portion, so that the side of the circuit board 21 can simultaneously contact the plurality of first contact portions 51. The circuit breaker module 3 of this embodiment is provided with four circuit breaker units. The control module 2 and the four circuit breaker units are arranged side by side along the width direction of the circuit breaker units. The monitoring module 1 is arranged at the end of the control module 2 and the circuit breaker module 3 along the length direction of the circuit breaker units. The monitoring module 1 includes four wiring structures 11 corresponding to the four circuit breaker units and four wiring structures 11 corresponding to the four power-taking structures 12.

[0088] Specifically, the four circuit breaker units are a first circuit breaker unit 301, a second circuit breaker unit 302, a third circuit breaker unit 303, and a fourth circuit breaker unit 304 arranged sequentially. The control module 2 is arranged adjacent to the fourth circuit breaker unit 304. The four power supply structures 12 are a first power supply structure 121, a second power supply structure 122, a third power supply structure 123, and a fourth power supply structure 124. The first power supply structure 121, the second power supply structure 122, the third power supply structure 123, and the fourth power supply structure 124 are used to connect the circuit board 21 and the first... The lengths of the first contact portion 51 of the first power-taking structure 121, the first contact portion 51 of the second power-taking structure 122, the first contact portion 51 of the third power-taking structure 123, and the first contact portion 51 of the fourth power-taking structure 124 decrease sequentially, as do the lengths of the support portion 120 of the first power-taking structure 121, the support portion 120 of the second power-taking structure 122, the support portion 120 of the third power-taking structure 123, and the support portion 120 of the fourth power-taking structure 124.

[0089] like Figure 2 As shown, the wiring structure 11 includes a circuit breaker wiring section 111 for connecting the circuit breaker terminals and a monitoring wiring section 112 for fixing external conductors. The monitoring wiring section 112 is used to push and compress the third elastic section 43 of the corresponding power-taking structure 12. The monitoring wiring sections 112 of the multiple wiring structures 11 are located on the same plane. The lengths of the third elastic sections 43 of the four power-taking structures 12 are different, which allows the elasticity between the four power-taking structures 12 and the third elastic sections 43 to be moderate. In this embodiment, the lengths of the third elastic sections 43 of the four power-taking structures 12 gradually increase along the direction closer to the control module 2, that is, the lengths of the third elastic sections 43 of the first power-taking structure 121, the second power-taking structure 122, the third power-taking structure 123, and the fourth power-taking structure 124 increase sequentially.

[0090] like Figure 10 As shown, the monitoring module 1 is provided with a limiting side plate 14 between the support parts 120 of two adjacent power taking structures 12. The limiting side plate 14 is used to insulate and limit the support parts 120 on both sides.

[0091] like Figures 11-12As shown, the conductive parts 113 of three wiring structures 11 are integrally formed with their respective circuit breaker wiring parts 111 and monitoring wiring parts 112. The conductive part 113 of another wiring structure 11 is a flexible connection between the circuit breaker wiring part 111 and the monitoring wiring part 112. The zero-sequence current transformer 13 has a U-shaped isolation structure 6 in the middle. The isolation structure 6 is used to isolate the conductive parts 113 of multiple wiring structures 11. The isolation structure 6 includes three partitions 61. One partition 61 is connected between one end of the other two partitions 61. The inner side of the three partitions 61 forms a space for the flexible connection to pass through. The outer side of the three partitions 61 is provided with limiting grooves 62 for limiting the conductive parts 113 of the other three power taking structures 12. The isolation structure 6 can separate four sets of wiring structures 11.

[0092] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0093] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A residual current protection circuit breaker, comprising a monitoring module (1), a control module (2), and a circuit breaker module (3), wherein the circuit breaker module (3) comprises at least one circuit breaker unit arranged side by side, the monitoring module (1) comprises a zero-sequence current transformer (13), a wiring structure (11), and a power-taking structure (12), the wiring structure (11) is arranged corresponding to the circuit breaker unit, the two ends of the wiring structure (11) are respectively used to connect the corresponding circuit breaker unit and an external conductor, the middle part of the wiring structure (11) passes through the zero-sequence current transformer (13), the control module (2) comprises a circuit board (21), the circuit board (21) is electrically connected to the power-taking structure (12), and the zero-sequence current transformer (13) is electrically connected to the circuit board (21) for transmitting the collected residual current signal, characterized in that: The monitoring module (1) is provided with an elastic part (4) connected to the power supply structure (12) and / or the zero-sequence current transformer (13). The elastic part (4) is provided with a contact part (5) for connecting the circuit board (21). The elastic part (4) drives the contact part (5) to abut against the circuit board (21).

2. The residual current protection circuit breaker according to claim 1, characterized in that: The number of power-taking structures (12) is set in accordance with the number of circuit breaker units. The power-taking structure (12) is connected to the wiring structure (11) connected to the corresponding circuit breaker unit. The control module (2) draws power from the circuit breaker module (3) through the power-taking structure (12). The power-taking structure (12) is provided with a first elastic part (41) as an elastic part (4). The first elastic part (41) is provided with a first contact part (51) as a contact part (5). The circuit board (21) can abut against the first contact part (51) so that the first contact part (51) pushes the first elastic part (41) and drives the first contact part (51) to press against the circuit board (21) through the first elastic part (41).

3. The residual current protection circuit breaker according to claim 1, characterized in that: The zero-sequence current transformer (13) is provided with two second elastic parts (42) as elastic parts (4). The two second elastic parts (42) are respectively connected to the two ends of the winding of the zero-sequence current transformer (13). The second elastic part (42) is provided with a second contact part (52) as a contact part (5). The circuit board (21) can push the second contact part (52) to compress the second elastic part (42). The second elastic part (42) drives the second contact part (52) to press against the circuit board (21), thereby enabling the circuit board (21) to collect current signals through the zero-sequence current transformer (13).

4. The residual current protection circuit breaker according to claim 2, characterized in that: The power extraction structure (12) includes a third elastic part (43) and a support part (120) connected between the third elastic part (43) and the first elastic part (41). The wiring structure (11) can compress the third elastic part (43) of the corresponding power extraction structure (12) so that the third elastic part (43) and the wiring structure (11) are pressed together.

5. The residual current protection circuit breaker according to claim 4, characterized in that: The third elastic part (43) is in the shape of a cylindrical spring.

6. The residual current protection circuit breaker according to claim 5, characterized in that: The monitoring module (1) is provided with a spring post (430), and the third elastic part (43) is sleeved on the spring post (430).

7. The residual current protection circuit breaker according to claim 5, characterized in that: The elastic part (4) and the contact part (5) are elastic rods. The contact part (5) is bent and connected to the elastic part (4). The contact part (5) is perpendicular to the circuit board (21).

8. The residual current protection circuit breaker according to claim 1, characterized in that: The circuit board (21) has multiple positioning grooves (211) spaced apart on its side, and the contact part (5) extends into the positioning groove (211). The side wall of the positioning groove (211) is provided with a conductive layer.

9. The residual current circuit breaker according to any one of claims 1-8, characterized in that: The monitoring module (1) includes a monitoring housing, which includes a first monitoring side plate (101) and a second monitoring side plate (102) spaced apart. The zero-sequence current transformer (13), wiring structure (11) and power supply structure (12) are located between the first monitoring side plate (101) and the second monitoring side plate (102). The second monitoring side plate (102) includes a circuit breaker area corresponding to the circuit breaker module and a control module area corresponding to the control module (2). The control module area is provided with a second monitoring wiring hole (104), and multiple contact parts (5) are provided in the second monitoring wiring hole (104).

10. The residual current protection circuit breaker according to claim 9, characterized in that: The wiring structure (11) includes a circuit breaker wiring section (111) for connecting the circuit breaker terminals, a monitoring wiring section (112) for fixing external conductors, and a conductive section (113) connected between the circuit breaker wiring section (111) and the monitoring wiring section (112). The conductive section (113) passes through a zero-sequence current transformer (13). The circuit breaker area is provided with a plurality of first monitoring wiring holes (103) at intervals. The circuit breaker wiring section (111) extends from the monitoring wiring holes and connects to the terminals of the circuit breaker unit. The plurality of first monitoring wiring holes (103) are arranged along the width direction of the circuit breaker unit. The plurality of contact parts (5) in the second monitoring wiring hole (104) are arranged along the height direction of the circuit breaker unit.

11. The residual current protection circuit breaker according to claim 10, characterized in that: The first monitoring wiring hole (103) is provided with a plurality of support bosses (15) of different heights, and the support bosses (15) are provided with limiting grooves (16) for limiting the elastic part (4).

12. The residual current protection circuit breaker according to claim 9, characterized in that: The monitoring housing includes a monitoring base plate and a monitoring top plate spaced apart. The first monitoring side plate (101) and the second monitoring side plate (102) are located between the monitoring base plate and the monitoring top plate. The monitoring housing is also provided with monitoring wiring terminals. The monitoring wiring part (112) is inserted into the monitoring wiring terminals. The first monitoring side plate (101) is provided with a monitoring wiring hole (105) for inserting external wires. The monitoring top plate is provided with a wiring operation hole (106).

13. The residual current protection circuit breaker according to claim 2, characterized in that: The monitoring module (1) includes multiple power-taking structures (12). The first elastic part (41) of the multiple power-taking structures (12) is misaligned along the projection of the circuit breaker unit in the height direction. At least one of the first contact parts (51) has an extension part, so that the length of the first contact part (51) is different from that of the other first contact parts (51). The extension part and the projection of the other first contact parts (51) along the height direction of the circuit breaker unit have an overlapping part.

14. The residual current protection circuit breaker according to claim 12, characterized in that: The power-taking structure (12) is provided with a third elastic part (43) connected to the wiring structure (11). The monitoring wiring part (112) compresses the third elastic part (43) of the corresponding power-taking structure (12). The monitoring wiring parts (112) of multiple wiring structures (11) are located on the same plane. The length of the third elastic part (43) of at least one power-taking structure (12) is different from that of the third elastic part (43) of other power-taking structures (12).

15. The residual current protection circuit breaker according to claim 4, characterized in that: The monitoring module (1) is provided with a limiting side plate (14) between the support parts (120) of two adjacent power taking structures (12). The limiting side plate (14) is used to insulate and limit the support parts (120) on both sides.

16. The residual current protection circuit breaker according to claim 5, characterized in that: The axis of the third elastic part (43) is perpendicular to the plane containing the first elastic part (41) and the contact part (5).

17. The residual current protection circuit breaker according to claim 10, characterized in that: The zero-sequence current transformer (13) has an isolation structure (6) in the middle, which is used to isolate the conductive parts (113) of multiple wiring structures (11).

18. The residual current protection circuit breaker according to claim 17, characterized in that: The monitoring module (1) includes four wiring structures (11), wherein the conductive parts (113) of three wiring structures (11) are integrally formed with their respective circuit breaker wiring parts (111) and monitoring wiring parts (112), and the conductive part (113) of the other wiring structure (11) is a flexible connection connecting the circuit breaker wiring part (111) and the monitoring wiring part (112). The isolation structure (6) includes three partitions (61), one of which is connected between one end of the other two partitions (61). The inner side of the three partitions (61) forms a space for the flexible connection to pass through, and the outer side of the three partitions (61) is provided with limiting grooves (62) for limiting the conductive parts (113) of the other three power taking structures (12).

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