A whole structure of an electric leakage circuit breaker

Abstract

The complete structure of this residual current circuit breaker includes the circuit breaker housing, residual current trip unit, magnetic ring, and test button. The housing consists of a base, a middle seat, and a top cover. The middle seat, together with the upper and lower components, forms the L-pole and N-pole bases. The L-pole contains an arc-extinguishing chamber and an L-pole moving and stationary contact assembly. The N-pole contains a circuit board and an N-pole moving and stationary contact assembly. In terms of circuit connection, the L-pole inlet terminal is connected to a bimetallic strip via a wire, then to the L-pole moving contact. The stationary contact is connected to the residual current trip unit and then to the outlet terminal. The N-pole inlet terminal is connected to the N-pole moving contact via a wire, and the stationary contact is connected to the outlet terminal. The residual current trip unit, magnetic ring, and test torsion spring are all connected to the circuit board via wires, and the L-pole and N-pole power supply wires pass through the magnetic ring. The arc-extinguishing chamber has upper and lower vents. The L-pole has an intervald wire receiving area and two arc-running vent channels. The bottom surface has two vents, and the vents are connected to the corresponding vent channels. The two vent channels are also connected through a vent hole. The residual current trip unit wires are placed in the receiving area. This optimizes the internal space layout, facilitates assembly, and prevents wire damage and product breakage.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to the overall structure of a leakage current circuit breaker. Background Technology

[0002] 1P+N residual current circuit breakers (RCCBs) are commonly used low-voltage electrical components and are widely used in household and industrial power distribution systems to achieve circuit switching control and residual current protection. Currently, 18mm wide 1P+N RCCBs on the market have a very compact internal structure due to width limitations. However, they integrate many components such as residual current trip units, magnetic rings, circuit boards, and contact assemblies. Among these, the magnetic rings are relatively large, making installation difficult and assembly inefficient within limited space.

[0003] Meanwhile, the arc ignition, high-temperature gas venting, and conductor arrangement in residual current circuit breakers (RCCBs) are crucial. In existing 18mm wide 1P+N RCCBs, even with complete functionality, the internal components are numerous and the structure is compact. Under this design, if arc ignition and high-temperature gas venting are not timely, it will severely affect the product's performance during operation, and may even lead to the product exploding. The RCCB contains multiple conductors, such as power supply conductors, residual current trip conductors, test circuit conductors, and magnetic ring conductors. If the conductor arrangement is improper, the relatively thin residual current trip conductors, test circuit conductors, and magnetic ring conductors, if not properly isolated and protected, can easily be damaged by contact with or close proximity to arcs or high-temperature gases. Therefore, a circuit breaker structure that facilitates smooth arc ignition and high-temperature gas venting, with proper conductor arrangement and convenient magnetic ring installation, is needed. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art by providing a complete structure for a residual current circuit breaker, optimizing the internal space layout, facilitating assembly, avoiding wire damage and product breakage, and improving product performance.

[0005] The technical solution of this utility model is as follows: A complete structure of a residual current circuit breaker includes a circuit breaker housing, a residual current trip unit, a magnetic ring, and a test button. The circuit breaker housing includes a base, a middle base, and a top cover. The middle base, together with the top cover and the base, forms an L-pole base and an N-pole base, respectively. The L-pole base contains an arc-extinguishing chamber, an L-pole moving and stationary contact assembly, a bimetallic strip, an L-pole inlet terminal, and an L-pole outlet terminal. The N-pole base contains a circuit board, an N-pole moving and stationary contact assembly, an N-pole inlet terminal, and an N-pole outlet terminal. The L-pole incoming terminal is connected to the bimetallic strip via the first L-pole power wire. The bimetallic strip is connected to the L-pole moving contact via the second L-pole power wire. The L-pole stationary contact is connected to the residual current device (RCD). The RCD is connected to the L-pole outgoing terminal. The N-pole incoming terminal is connected to the N-pole moving contact via the N-pole power wire. The N-pole stationary contact is connected to the N-pole outgoing terminal. The RCD is connected to the circuit board via the RCD wire. The magnetic ring is connected to the circuit board via the magnetic ring wire. The test button acts on the test torsion spring. The test torsion spring is connected to the circuit board via the test circuit wire. The first L-pole power wire and the N-pole power wire pass through the magnetic ring. The arc-extinguishing chamber is provided with a first air outlet and a second air outlet distributed vertically. The L-electrode base has a leakage current trip unit wire receiving area, a first arc-running exhaust channel and a second arc-running exhaust channel formed inside the L-electrode base. The bottom surface of the L-electrode base is provided with a first exhaust port and a second exhaust port. The first air outlet and the first exhaust port are connected through the first arc-running exhaust channel. The second air outlet and the second exhaust port are connected through the second arc-running exhaust channel. The first arc-running exhaust channel and the second arc-running exhaust channel are also connected through a vent hole. The leakage current trip unit wire is located in the leakage current trip unit wire receiving area.

[0006] By adopting the above technical solution, this utility model can effectively divert and discharge the high-temperature, high-pressure gas after passing through the arc-extinguishing chamber through two arc-running exhaust channels. Each of the two exhaust channels is equipped with a corresponding exhaust port. When there is a pressure difference between the two spaces, under the influence of the pressure difference, the high-temperature gas in the higher-pressure exhaust channel flows through the vent to the lower-pressure exhaust channel for buffered convection. This prevents the product casing from cracking and ensures that the high-temperature gas is promptly discharged. This achieves effective gas discharge from the arc-extinguishing chamber, avoiding the problem of circuit breaker performance degradation due to gas accumulation.

[0007] In addition, the residual current device (RCD) has a wire accommodating area that can accommodate excessively long wires, ensuring that each wire is placed in a reasonable and appropriate position. This also prevents electric arcs and high-temperature gases from penetrating and damaging the wires, thus optimizing the wiring structure and improving the stability and safety of the circuit breaker.

[0008] Optimize the internal space layout to facilitate assembly, prevent wire damage and product breakage, and improve product performance.

[0009] A further feature of this invention is as follows: a first arc-blocking plate and a second arc-blocking plate are respectively provided on the opposite sides of the middle seat and the upper cover, and the first arc-blocking plate and the second arc-blocking plate abut against each other to form an isolation structure between the first arc-running exhaust channel and the second arc-running exhaust channel; an arc-blocking plate A and an arc-blocking plate B are also respectively provided on the opposite sides of the middle seat and the upper cover, and the arc-blocking plate A and the arc-blocking plate B abut against each other to form an isolation structure between the leakage current trip device wire receiving area and the first arc-running exhaust channel; the vent is opened on the first arc-blocking plate or the second arc-blocking plate, and the first exhaust port and the second exhaust port are located on the bottom surface of the middle seat.

[0010] With the further configuration described above, the first and second arc-isolating plates effectively separate the first and second arc-exhausting channels, preventing the disorderly flow of high-temperature, high-pressure gas between them and further enhancing the gas diversion and discharge effect. Simultaneously, the combined use of arc-isolating plates A and B effectively isolates the leakage current trip unit conductor housing area from the first arc-exhausting channel, protecting the conductor from damage by electric arcs and high-temperature gas. The reasonable placement of the vent holes ensures that when there is a pressure difference between the two arc-exhausting channels, high-temperature gas can flow smoothly from the higher-pressure channel to the lower-pressure channel, achieving effective buffering convection. This design not only improves the safety and stability of the circuit breaker but also further optimizes its overall performance.

[0011] A further feature of this invention is as follows: the N-pole substrate has a test circuit wire receiving area, a magnetic ring wire receiving area, and an arc generating area formed inside. The test circuit wire receiving area is located away from the arc generating area, and the magnetic ring wire receiving area is spaced apart from the arc generating area. A third vent is provided on the bottom surface of the N-pole substrate, and the arc generating area is connected to the third vent. The test circuit wire is located in the test circuit wire receiving area, and the magnetic ring wire is located in the magnetic ring wire receiving area.

[0012] By adopting the above-mentioned further design, an independent space is formed, which allows each conductor to be placed in a reasonable and appropriate position, and also prevents electric arcs and high-temperature gases from penetrating and damaging the conductors.

[0013] A further feature of this invention is that a partition is provided between the lower part of the middle seat and the base, which separates the magnetic ring wire receiving area from the arc generating area; the base is provided with a test circuit wire receiving area.

[0014] With the aforementioned further design, the partition cleverly divides the magnetic ring conductor receiving area and the arc generation area, effectively isolating areas with different functions. The magnetic ring conductor receiving area is specifically designed to accommodate the magnetic ring conductor, ensuring the safety and stability of the conductor and avoiding potential damage caused by factors such as electric arcs.

[0015] A further feature of this invention is that the upper end of the partition member corresponding to the base has a supporting boss, the inner surface of the base has a limiting platform, the supporting boss abuts against the inner surface of the base, the limiting platform abuts against the plate surface of the partition member, and the lower end of the partition member abuts against the lower bottom wall of the base, so as to enclose the magnetic ring wire receiving area.

[0016] The further design, including the supporting boss and limiting platform, enhances the stability and robustness of the connection between the partition and the base. This design not only ensures precise positioning of the partition on the base but also effectively prevents displacement or loosening during use through multi-point contact. The enclosed magnetic ring wire receiving area is thus more stable and reliable, providing a solid guarantee for the safe containment of the magnetic ring wire. Furthermore, this structural design simplifies the installation and disassembly process, improving overall ease of operation.

[0017] Further features of this invention: the base is provided with an arc-shaped boss, the upper end of the partition is provided with an arc-shaped concave surface, the arc-shaped concave surface abuts against the outer periphery of the arc-shaped boss; the partition is provided with a support surface and a mating boss on both sides corresponding to one side of the middle seat; the middle seat and the base are provided with a protruding platform and a limiting groove on the opposite side; the base is also provided with a positioning boss; the support surface abuts against the protruding platform; the mating boss and the positioning boss are both inserted into the limiting groove to enclose the arc generating area; the third exhaust port is provided on the bottom surface of the middle seat and there are multiple of them.

[0018] The further design, featuring a combination of curved bosses and curved concave surfaces, enhances the stability and tightness of the structure. This design not only strengthens the connection between the base and the partition through the interlocking curved surfaces, but also optimizes the overall stress distribution, making the structure more stable under external forces. Furthermore, the ingenious combination of curved bosses and curved concave surfaces helps reduce errors during assembly, ensuring that all components can be accurately joined together, thereby improving overall assembly accuracy and product quality.

[0019] A further feature of this invention is as follows: the middle base includes a main body and corner pieces that are separately configured. The corner pieces include a first component and a second component. The first component and the second component are connected to form a corner structure. The main body has a corner opening with an open outer edge. The corner pieces are fitted to the corner of the main body to close the outer edge of the corner opening. The corner pieces are located between the base and the top cover. The L-pole base and the N-pole base are connected through the corner opening to form a magnetic ring placement area. The magnetic ring is installed at an angle within the magnetic ring placement area.

[0020] Further employing the above-described design, the central base is not a single-piece design. To facilitate better assembly of the magnetic ring, the central base, specifically the area where the magnetic ring is placed, is designed as a main body and corner pieces. The N-pole portion is assembled on one side of the main body, followed by the assembly of the base and main body. Then, the L-pole portion and magnetic ring are assembled on the other side of the main body. After assembly, the corner pieces are fastened to the main body, and the top cover is placed on top. A further feature of this invention is that one end of the corner piece is provided with an insert plate and the other end is provided with a mating surface. The corner opening of the main body is provided with a mating groove and a contacting surface. During assembly, the insert plate of the corner piece is inserted into the mating groove of the main body, and the mating surface of the corner piece abuts against the contacting surface of the main body.

[0021] With the further configuration described above, the corner piece and the main body are connected via insert plates, mating grooves, mating surfaces, and contact surfaces. This connection method is not only simple and convenient but also effectively ensures the stability of the connection between the corner piece and the main body. This design reorganizes the overall space of the machine, achieving a reasonable placement area for the magnetic ring.

[0022] A further feature of this invention is that the magnetic ring is circular, and the inner wall of the first component has a recessed area that avoids the circumferential structure of the magnetic ring.

[0023] With the above-mentioned further design, the magnetic ring can be placed more smoothly in the magnetic ring placement area during installation, without worrying about interference between the circumferential structure of the magnetic ring and the inner wall of the first component, and the magnetic ring can be perfectly assembled.

[0024] A further feature of this invention is as follows: the L-pole input terminal and the N-pole input terminal are located above the magnetic ring. The upper end of the first L-pole power conductor is connected to the L-pole input terminal, and the lower end passes through the magnetic ring and is connected to the lower end of the bimetallic strip. The upper end of the bimetallic strip is connected to the L-pole moving contact via the upper end of the second L-pole power conductor. The upper end of the N-pole power conductor is connected to the N-pole input terminal, and the lower end passes through the magnetic ring and is connected to the N-pole moving contact.

[0025] With the further configuration described above, the input terminals for both the L and N poles are cleverly positioned above the magnetic ring. This layout not only saves space but also makes the routing of the power supply wires more rational. The L pole power supply wire, after exiting the input terminal, passes through the magnetic ring and connects to the lower end of the bimetallic strip, while the upper end of the bimetallic strip connects to the L pole moving contact via another wire, forming a complete L pole circuit. Similarly, the N pole power supply wire connects to the N pole moving contact along a similar path, forming an N pole circuit. This circuit design not only ensures stable current transmission but also, through the magnetic field of the magnetic ring, improves the circuit's anti-interference capability to a certain extent, resulting in superior performance of the residual current circuit breaker. Attached Figure Description

[0026] Figure 1 This is a structural diagram of a specific embodiment of the present utility model; Figure 2 This is a cross-sectional view of a specific embodiment of the present utility model; Figure 3 This is a structural diagram of one side of the L-pole of the middle seat in a specific embodiment of this utility model; Figure 4 for Figure 3 A magnified view of a portion of the image; Figure 5 This is a structural diagram of the upper cover of a specific embodiment of the present utility model; Figure 6 This is a structural diagram of one side of the N-pole of the central seat in a specific embodiment of this utility model; Figure 7 This is a structural diagram of the middle seat in a specific embodiment of the present utility model; Figure 8 This is a structural diagram of the main body of a specific embodiment of the present utility model; Figure 9 A structural diagram of one side of the corner opening in a specific embodiment of this utility model; Figure 10 This is a structural diagram of the corner piece according to a specific embodiment of the present utility model; Figure 11 This is a structural diagram of the middle seat in a specific embodiment of the present utility model; Figure 12 This is a structural diagram of the base according to a specific embodiment of the present utility model; Figure 13 This is a structural diagram of the partition component corresponding to one side of the base in a specific embodiment of this utility model; Figure 14 This is a structural diagram of the partition component corresponding to one side of the middle seat in a specific embodiment of this utility model; Figure 15 This is an assembly diagram of the partition and base according to a specific embodiment of the present utility model. Detailed Implementation

[0027] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] like Figure 1-15 As shown, the overall structure of a residual current circuit breaker according to this utility model includes a circuit breaker housing 1, a residual current trip unit 2, a magnetic ring 3, and a test button 4. The circuit breaker housing 1 includes a base 11, a middle seat 12, and a top cover 13. The middle seat 12 cooperates with the top cover 13 and the base 11 to form an L-pole base and an N-pole base, respectively. The L-pole base is provided with an arc-extinguishing chamber 14, an L-pole moving and stationary contact assembly 15, a bimetallic strip 16, an L-pole inlet terminal 17, and an L-pole outlet terminal 18. The N-pole base is provided with a circuit board 19, an N-pole moving and stationary contact assembly 20, an N-pole inlet terminal 21, and an N-pole outlet terminal 22. L-pole incoming terminal 17 is connected to bimetallic strip 16 via first L-pole power lead 23. Bimetallic strip 16 is connected to L-pole moving contact 151 via second L-pole power lead 24. L-pole stationary contact 152 is connected to leakage current trip unit 2. Leakage current trip unit 2 is connected to L-pole outgoing terminal 18. N-pole incoming terminal 21 is connected to N-pole moving contact 201 via N-pole power lead 25. N-pole stationary contact 202 is connected to N-pole outgoing terminal 22. Leakage current trip unit 2 is connected to circuit board 19 via leakage current trip unit lead 5. Magnetic ring 3 is connected to circuit board 19 via magnetic ring lead 6. Test button 4 acts on test torsion spring 26, which is connected to the test circuit. Wire 7 is connected to circuit board 19. The first L-pole power wire 23 and N-pole power wire 25 pass through magnetic ring 3. The L-pole incoming terminal 17 and N-pole incoming terminal 21 are located above magnetic ring 3. The upper end of the first L-pole power wire 23 is connected to the L-pole incoming terminal 17, and the lower end passes through magnetic ring 3 and is connected to the lower end of bimetallic strip 16. The upper end of bimetallic strip 16 is connected to L-pole moving contact 151 via the upper end of second L-pole power wire 24. The upper end of the N-pole power wire 25 is connected to N-pole incoming terminal 21, and the lower end passes through magnetic ring 3 and is connected to N-pole moving contact 201. The positions of the incoming terminal and the outgoing terminal can be interchanged. The arc-extinguishing chamber 14 is provided with a first air outlet 141 and a second air outlet 142 distributed vertically. The L-electrode substrate has a leakage current trip unit wire receiving area 27, a first arc-running exhaust channel 28 and a second arc-running exhaust channel 29 formed inside the substrate. The bottom surface of the L-electrode substrate is provided with a first exhaust port 30 and a second exhaust port 31. The first air outlet 141 and the first exhaust port 30 are connected through the first arc-running exhaust channel 28. The second air outlet 142 and the second exhaust port 31 are connected through the second arc-running exhaust channel 29. The first arc-running exhaust channel 28 and the second arc-running exhaust channel 29 are also connected through a vent 32. The leakage current trip unit wire 5 is located in the leakage current trip unit wire receiving area 27. The middle seat 12 and the upper cover 13 are respectively provided with a first arc-blocking plate 33 and a second arc-blocking plate 34 on opposite sides. The first arc-blocking plate 33 and the second arc-blocking plate 34 abut against each other to form an isolation structure between the first arc-running exhaust channel 28 and the second arc-running exhaust channel 29. The middle seat 12 and the upper cover 13 are also respectively provided with an arc-blocking plate A35 and an arc-blocking plate B36 on opposite sides. The arc-blocking plate A35 and the arc-blocking plate B36 abut against each other to form an isolation structure between the leakage current trip device wire receiving area 27 and the first arc-running exhaust channel 28. The vent 32 is opened on the first arc-blocking plate 33 or the second arc-blocking plate 34. The first exhaust port 30 and the second exhaust port 31 are provided on the bottom surface of the middle seat 12. The N-pole substrate contains a test circuit wire receiving area 37, a magnetic ring wire receiving area 38, and an arc generating area 39. The test circuit wire receiving area 37 is located away from the arc generating area 39, and the magnetic ring wire receiving area 38 and the arc generating area 39 are spaced apart. A third vent 40 is provided on the bottom surface of the N-pole substrate, and the arc generating area 39 is connected to the third vent 40. The test circuit wire 7 is located in the test circuit wire receiving area 37, and the magnetic ring wire 6 is located in the magnetic ring wire receiving area 38. A partition 41 is provided between the lower part of the middle seat 12 and the base 11, separating the magnetic ring wire receiving area 38 from the arc generating area 39. The test circuit wire receiving area 37 is provided on the base 11. The partition plate 41 has a supporting boss 411 on the upper end of the side corresponding to the base 11. The inner surface of the base 11 has a limiting platform 111. The supporting boss 411 abuts against the inner surface of the base 11, the limiting platform 111 abuts against the plate surface of the partition plate 41, and the lower end of the partition plate 41 abuts against the lower bottom wall of the base 11 to enclose the magnetic ring wire receiving area 38.The base 11 is provided with an arc-shaped boss 112, and the upper end of the partition 41 is provided with an arc-shaped concave surface 412, which abuts against the outer periphery of the arc-shaped boss 112. The partition 41 is provided with a support surface 413 and a mating boss 414 on both sides corresponding to one side of the middle seat 12. The middle seat 12 and the base 11 are provided with a protruding platform 121 and a limiting groove 122 on the opposite side. The base 11 is also provided with a positioning boss 113. The support surface 413 abuts against the protruding platform 121. The mating boss 414 and the positioning boss 113 are both inserted into the limiting groove 122 to enclose the arc generating area 39. The third exhaust port 40 is provided on the bottom surface of the middle seat 12 and there are multiple ports.

[0029] Specifically, the middle base 12 includes a main base 123 and a corner piece 124, which are separately arranged. The corner piece 124 includes a first component 1241 and a second component 1242. The first component 1241 and the second component 1242 are connected to form a corner structure. The main base 123 is provided with a corner opening 1231. The outer edge of the corner opening 1231 is open. The corner piece 124 is adapted to be installed at the corner of the main base 123 to close the outer edge of the corner opening 1231. The corner piece 124 is located between the base 11 and the top cover 13. The L pole substrate and the N pole substrate are connected through the corner opening 1231 to form a magnetic ring placement area. The magnetic ring 3 is installed obliquely in the magnetic ring placement area. One end of the corner piece 124 is provided with an insert plate 1243, and the other end is provided with a mating surface 1244. The corner opening 1231 of the main body 123 is provided with a mating groove 1232 and a contact surface 1233. During assembly, the insert plate 1243 of the corner piece 124 is inserted into the mating groove 1232 of the main body 123, and the mating surface 1244 of the corner piece 124 abuts against the contact surface 1233 of the main body 123. The magnetic ring 3 is annular, and the inner wall of the first component 1241 has a recessed area 12411 to avoid the circumferential structure of the magnetic ring 3.

[0030] Example of the working principle of a residual current circuit breaker: I. Normal power supply status 1. L-pole circuit: External power is input through L-pole incoming terminal 17 and connected to bimetallic strip 16 through first L-pole power conductor 23. Bimetallic strip 16 is connected to L-pole moving contact 151 through second L-pole power conductor 24. When the circuit breaker is closed, L-pole moving contact 151 contacts L-pole stationary contact 152, and current is transmitted to L-pole outgoing terminal 18 through leakage trip unit 2 to complete L-pole power supply.

[0031] 2. N-pole circuit: The external neutral wire is input through the N-pole incoming terminal 21 and connected to the N-pole moving contact 201 through the N-pole power supply wire 25; when the circuit breaker is closed, the N-pole moving contact 201 contacts the N-pole stationary contact 202, and the current is transferred to the N-pole outgoing terminal 22 to complete the N-pole power supply.

[0032] II. Arc Extinguishing and Exhausting Process 1. L-pole arc extinguishing: The electric arc is drawn into the arc extinguishing chamber 14 and extinguished by the grid plates inside the arc extinguishing chamber. The arc gas is discharged from the first outlet 141 and the second outlet 142 of the arc extinguishing chamber, respectively through the first arc run-out exhaust channel 28 and the second arc run-out exhaust channel 29, and finally discharged from the first exhaust port 30 and the second exhaust port 31 on the bottom surface of the L-pole substrate. The two exhaust channels balance the air pressure through the vent 32. The arc isolation plate A35 and the arc isolation plate B36 isolate the leakage current trip wire 5 to prevent the electric arc from damaging the wire.

[0033] 2. N-pole exhaust: The electric arc generated by the N-pole contact is confined to the arc generation area 39, and the gas is discharged through the third exhaust port 40; the magnetic ring wire 6 is located in the magnetic ring wire receiving area 38 and is isolated from the arc generation area 39 by the partition 41 to prevent the electric arc from burning the wire.

[0034] This embodiment achieves leakage current and overload protection and safe arc extinguishing through structural design (such as tilted placement of the magnetic ring, independent exhaust channel, and conductor isolation area) in conjunction with the circuit, ensuring reliable operation of the circuit breaker.

[0035] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A complete structure of a residual current circuit breaker, comprising a circuit breaker housing (1), a residual current trip unit (2), a magnetic ring (3), and a test button (4), wherein the circuit breaker housing (1) comprises a base (11), a middle seat (12), and a top cover (13), the middle seat (12) cooperating with the top cover (13) and the base (11) to form an L-pole base and an N-pole base, wherein the L-pole base is provided with an arc-extinguishing chamber (14), an L-pole moving and stationary contact assembly (15), a bimetallic strip (16), an L-pole incoming terminal (17), and an L-pole outgoing terminal (18), and wherein the N-pole base is provided with a circuit board (19), an N-pole moving and stationary contact assembly (20), an N-pole incoming terminal (21), and an N-pole outgoing terminal (22), characterized in that: The L-pole incoming terminal (17) is connected to the bimetallic strip (16) via the first L-pole power supply wire (23). The bimetallic strip (16) is connected to the L-pole moving contact (151) via the second L-pole power supply wire (24). The L-pole stationary contact (152) is connected to the residual current device (2). The residual current device (2) is connected to the L-pole outgoing terminal (18). The N-pole incoming terminal (21) is connected to the N-pole moving contact (201) via the N-pole power supply wire (25). The N-pole stationary contact (152) is connected to the L-pole moving contact (201). The contact (202) is connected to the N-pole output terminal (22), the leakage trip unit (2) is connected to the circuit board (19) via the leakage trip unit wire (5), the magnetic ring (3) is connected to the circuit board (19) via the magnetic ring wire (6), the test button (4) acts on the test torsion spring (26), the test torsion spring (26) is connected to the circuit board (19) via the test circuit wire (7), and the first L-pole power supply wire (23) and the N-pole power supply wire (25) pass through the magnetic ring (3); The arc-extinguishing chamber (14) is provided with a first air outlet (141) and a second air outlet (142) distributed vertically. The L-electrode base has a leakage trip wire receiving area (27), a first arc-running exhaust channel (28) and a second arc-running exhaust channel (29) formed inside it. The bottom surface of the L-electrode base is provided with a first exhaust port (30) and a second exhaust port (31). The first air outlet (141) and the first exhaust port (30) are connected through the first arc-running exhaust channel (28). The second air outlet (142) and the second exhaust port (31) are connected through the second arc-running exhaust channel (29). The first arc-running exhaust channel (28) and the second arc-running exhaust channel (29) are also connected through a vent (32). The leakage trip wire (5) is located in the leakage trip wire receiving area (27).

2. The structure of the entire leakage circuit breaker according to claim 1, characterized in that: The middle seat (12) and the upper cover (13) are respectively provided with a first arc-blocking plate (33) and a second arc-blocking plate (34). The first arc-blocking plate (33) and the second arc-blocking plate (34) abut against each other to form an isolation structure between the first arc-running exhaust channel (28) and the second arc-running exhaust channel (29). The middle seat (12) and the upper cover (13) are also respectively provided with an arc-blocking plate A (35) and an arc-blocking plate B (36). The arc-blocking plate A (35) and the arc-blocking plate B (36) abut against each other to form an isolation structure between the leakage current trip device wire receiving area (27) and the first arc-running exhaust channel (28). The vent (32) is opened on the first arc-blocking plate (33) or the second arc-blocking plate (34). The first exhaust port (30) and the second exhaust port (31) are located on the bottom surface of the middle seat (12).

3. The structure of the entire leakage circuit breaker according to claim 1, characterized in that: The N-pole substrate has a test circuit wire receiving area (37), a magnetic ring wire receiving area (38), and an arc generating area (39) formed inside. The test circuit wire receiving area (37) is located away from the arc generating area (39), and the magnetic ring wire receiving area (38) and the arc generating area (39) are spaced apart from each other. A third exhaust port (40) is provided on the bottom surface of the N-pole substrate. The arc generating area (39) is connected to the third exhaust port (40). The test circuit wire (7) is located in the test circuit wire receiving area (37), and the magnetic ring wire (6) is located in the magnetic ring wire receiving area (38).

4. The structure of the entire leakage circuit breaker according to claim 3, characterized in that: A partition (41) is provided between the lower part of the middle seat (12) and the base (11), and the partition (41) separates the magnetic ring wire receiving area (38) and the arc generating area (39); the base (11) is provided with a test circuit wire receiving area (37).

5. The structure of the entire leakage circuit breaker according to claim 4, characterized in that: The partition (41) has a support boss (411) on the upper end of the side corresponding to the base (11). The inner surface of the base (11) has a limiting platform (111). The support boss (411) abuts against the inner surface of the base (11), the limiting platform (111) abuts against the plate surface of the partition (41), and the lower end of the partition (41) abuts against the lower bottom wall of the base (11) to enclose the magnetic ring wire receiving area (38).

6. The structure of the entire leakage circuit breaker according to claim 5, characterized in that: The base (11) is provided with an arc-shaped boss (112), and the upper end of the partition (41) is provided with an arc-shaped concave surface (412), which abuts against the outer periphery of the arc-shaped boss (112). The partition (41) is provided with a support surface (413) and a mating boss (414) on both sides of the side corresponding to the middle seat (12). The middle seat (12) and the base (11) are provided with a protruding platform (121) and a limiting groove (122) on the opposite side. The base (11) is also provided with a positioning boss (113). The support surface (413) abuts against the protruding platform (121). The mating boss (414) and the positioning boss (113) are both inserted into the limiting groove (122) to enclose the arc generation area (39). The third exhaust port (40) is provided on the bottom surface of the middle seat (12) and there are multiple of them.

7. The structure of the entire leakage circuit breaker according to any one of claims 1 to 6, characterized in that: The middle seat (12) includes a main seat body (123) and a corner piece (124) that are separately set. The corner piece (124) includes a first component (1241) and a second component (1242). The first component (1241) and the second component (1242) are connected to form a corner structure. The main seat body (123) is provided with a corner opening (1231). The outer edge of the corner opening (1231) is open. The corner piece (124) is adapted to be installed at the corner of the main seat body (123) to close the outer edge of the corner opening (1231). The corner piece (124) is located between the base (11) and the top cover (13). The L pole base and the N pole base are connected through the corner opening (1231) to form a magnetic ring placement area. The magnetic ring (3) is installed at an angle in the magnetic ring placement area.

8. The structure of the entire leakage circuit breaker according to claim 7, characterized in that: One end of the corner piece (124) is provided with a insert plate (1243) and the other end is provided with a mating surface (1244). The corner opening (1231) of the main body (123) is provided with a mating groove (1232) and a contacting surface (1233). During assembly, the insert plate (1243) of the corner piece (124) is inserted into the mating groove (1232) of the main body (123), and the mating surface (1244) of the corner piece (124) abuts against the contacting surface (1233) of the main body (123).

9. The structure of the entire leakage circuit breaker according to claim 7, characterized in that: The magnetic ring (3) is circular, and the inner wall of the first component (1241) has a recessed area (12411) that avoids the circumferential structure of the magnetic ring (3).

10. The structure of the entire leakage circuit breaker according to any one of claims 1 to 6, characterized in that: The L-pole incoming terminal (17) and N-pole incoming terminal (21) are located above the magnetic ring (3). The upper end of the first L-pole power supply wire (23) is connected to the L-pole incoming terminal (17), and the lower end passes through the magnetic ring (3) and is connected to the lower end of the bimetallic strip (16). The upper end of the bimetallic strip (16) is connected to the L-pole moving contact (151) via the upper end of the second L-pole power supply wire (24). The upper end of the N-pole power supply wire (25) is connected to the N-pole incoming terminal (21), and the lower end passes through the magnetic ring (3) and is connected to the N-pole moving contact (201).

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