Residual current operated circuit breaker

Abstract

A residual current operated circuit breaker comprises a shell and a testing mechanism, the shell comprises a first side plate and a second side plate which are oppositely arranged, and a first partition plate and a second partition plate which are respectively arranged between the first side plate and the second side plate, a first circuit breaker pole unit is arranged between the first side plate and the first partition plate, and a second circuit breaker pole unit is arranged between the second side plate and the second partition plate. A leakage protection unit is arranged between the first partition plate and the second partition plate, a second circuit breaker pole unit is arranged between the second partition plate and the second side plate, a first breakpoint of a test loop is formed through the first movable contact part and the first static contact part, and a second breakpoint of the test loop is formed through the second static contact part and the second movable contact part. The first breakpoint and the second breakpoint of the test loop are arranged in the electric leakage protection unit, so that the structure of the test mechanism is more compact, the problem of an electrical gap between the main loop and the test loop does not need to be considered, and the problem of short circuit between different loops is avoided.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to a residual current operated circuit breaker. Background Art

[0002] The test device of the residual current operated circuit breaker can simulate the residual current to test whether the residual current operated circuit breaker can operate, so as to regularly detect whether the residual current protection function is intact. In many existing test devices of the residual current operated circuit breaker, there is often only one break point at the test button in the test circuit. When the test button is pressed, the power supply forms a path through the test circuit. However, since the test circuit is generally cross-connected between the incoming line terminal and the outgoing line terminal of the two main circuits of the circuit breaker, even when the circuit breaker is tripped, the power supply may still make the load terminal charged through the test circuit, posing a safety hazard. Although the above problem can be overcome by adding break points, multiple break points are not only arranged in different circuit breaker pole units, but also have an unreasonable layout, resulting in a large volume and potential safety hazards. Summary of the Invention

[0003] The purpose of the utility model is to overcome at least one defect of the prior art and provide a residual current operated circuit breaker.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A residual current operated circuit breaker includes a housing and a test mechanism. The housing includes a first side plate and a second side plate arranged oppositely, and a first partition and a second partition respectively arranged between the first side plate and the second side plate. A first circuit breaker pole unit is arranged between the first side plate and the first partition, a leakage protection unit is arranged between the first partition and the second partition, and a second circuit breaker pole unit is arranged between the second partition and the second side plate;

[0006] The test mechanism includes a conductive sheet, a first spring, a second spring, a test resistor, a lever and a test button. The conductive sheet, the test resistor, the first spring and the second spring are all connected in series in the test circuit. The two ends of the test circuit are respectively connected to the first wiring terminal of the first circuit breaker pole unit and the second wiring terminal of the second circuit breaker pole unit;

[0007] The conductive sheet and the first spring are respectively provided with a first static contact part and a first moving contact part. When the first circuit breaker pole unit and the second circuit breaker pole unit conduct the main circuit, the lever drives the first moving contact part to contact the first static contact part;

[0008] The first spring and the second spring are respectively provided with a second static contact part and a second moving contact part. The test button is provided with a pressing part extending outside the housing for pressing. When the test button is pressed, it drives the second moving contact part to contact the second static contact part. The first static contact part, the first spring, the second spring, the test resistor, the lever and the test button are all arranged between the first partition plate and the second partition plate.

[0009] Preferably, both the first circuit breaker pole unit and the second circuit breaker pole unit include a first handle, an operating mechanism, a moving contact connected to the operating mechanism, and a static contact. The first handle drives the moving contact to close or break with the static contact through the operating mechanism. The first handles of the first circuit breaker pole unit and the second circuit breaker pole unit are linked. The operating mechanism includes a latch and a trip that are latched together. The latches of the operating mechanisms of the first circuit breaker pole unit and the second circuit breaker pole unit are directly or indirectly linked; the leakage protection unit includes a second handle, and the second handle is connected to the lever. When the first handle moves to the closing position, it drives the second handle to move to the second closing position. The second handle drives the lever to rotate, driving the first moving contact part to contact the first static contact part.

[0010] Preferably, the second handle is separately provided from the first handles of the first circuit breaker pole unit and the second circuit breaker pole unit. The second handle is located on the closing path of the first handles of the first circuit breaker pole unit and the second circuit breaker pole unit. When the first handle moves from the opening position to the closing position, it drives the second handle to move to the second closing position. When the first handle moves from the closing position to the opening position, it does not drive the second handle.

[0011] Preferably, the leakage protection unit further includes a leakage detection module, an actuator, and a zero-sequence current transformer arranged between the first partition plate and the second partition plate. When the leakage detection module detects leakage through the zero-sequence current transformer, the actuator directly or indirectly drives the latches of the operating mechanisms of the first circuit breaker pole unit and the second circuit breaker pole unit, causing the two circuit breaker pole units to trip and open. The first handle moves to the opening position. At the same time, the actuator directly or indirectly drives the lever, causing the first moving contact part to separate from the first static contact part, and the second handle resets to the second opening position.

[0012] Preferably, a second trip and a second latch are respectively rotatably provided on the lever. The second trip is connected to the second handle through a transmission rod. When the second trip and the second latch are latched together, the second handle drives the lever to rotate around the first mounting post through the transmission rod, the second trip and the second latch, driving the first moving contact part to contact or separate from the first static contact part; when the second handle moves to the second closing position and drives the lever to make the first moving contact part contact the first static contact part, if the second trip and the second latch are unlatched, the second handle moves to the second opening position, and the lever resets to separate the first moving contact part from the first static contact part.

[0013] Preferably, the first spring is disposed below the test button, and the second spring is disposed below the first spring. The first static contact portion and the first moving contact portion of the first spring are oppositely disposed on both sides of the moving direction of the test button. The conductive sheet, the lever, and the first moving contact portion of the first spring are disposed on one side of the moving direction of the test button, and on the other side opposite to the moving direction of the test button, there are provided the first static contact portion of the first spring, the second moving contact portion of the second spring, and the test resistor. The second spring is connected to the second terminal through the test resistor. The first moving contact portion is located above the first static contact portion of the conductive sheet. The test button is provided with a pressing rod located above the first moving contact portion, and the pressing rod is used to drive the first moving contact portion to contact the first static contact portion. The second static contact portion is located on the side of the second moving contact portion away from the lever, and on the other side opposite to the second moving contact portion, there is provided a push rod connected to the lever, and the push rod is used to drive the second moving contact portion to contact the second static contact portion.

[0014] Preferably, the lever is provided with an avoidance groove, and a driving structure and a pushing structure oppositely disposed on both sides of the avoidance groove. The pushing structure is used to push the second moving contact portion to contact the second static contact portion, and the avoidance groove is used to avoid the first spring when the pushing structure pushes the second moving contact portion.

[0015] Preferably, the pushing structure includes a push rod, the push rod is connected to the driving structure through a connecting rod, and an avoidance groove is provided between the push rod, the connecting rod, and the driving structure. The end of the push rod away from the connecting rod is provided with a pushing groove for sleeving on the second moving contact portion of the second spring.

[0016] Preferably, the driving structure is provided with a driving plate in the shape of a flat plate. The driving plate is provided with a rotating hole, a first fixing post, a second fixing post, and a third fixing post. The second partition plate is provided with a first mounting post. The rotating hole is sleeved on the first mounting post, so that the lever is rotatably mounted on the first mounting post. The first fixing post and the second fixing post are disposed on the side of the driving structure close to the first side plate, and the third fixing post is disposed on the side of the driving structure close to the second side plate, and the third fixing post is coaxially disposed with the second fixing post. Second jump buckles and second locking buckles are respectively provided on the first fixing post and the first mounting post.

[0017] Preferably, the test button is provided with a pressing rod on the side of the lever. An avoidance space for passing through the first spring is provided between the pressing rod and the lever. The first static contact portion and the first moving contact portion of the first spring are oppositely disposed on both sides of the avoidance space. The first moving contact portion is disposed on the side of the avoidance space close to the conductive sheet. When the test button is pressed, it drives the pressing rod to push the first spring, so that the first moving contact portion of the first spring contacts the first static contact portion on the conductive sheet.

[0018] Preferably, the test button includes a sliding rod, and a pressing portion and a support rod oppositely arranged at both ends of the sliding rod. The sliding rod is slidably arranged on the second partition board. The pressing portion extends outside the housing. The middle parts of the sliding rod and the support rod are connected. The end of the support rod is provided with the pressing rod. The pressing rod, the support rod and the sliding rod are arranged orthogonally to each other. The pressing rod is provided with a protruding pressing boss on the side close to the lever. The pressing boss is used to push the first spring, so that the first moving contact portion of the first spring contacts the first static contact portion on the conductive sheet.

[0019] Preferably, a linkage member is provided. The linkage member is linked with the latches of the operating mechanisms of the first circuit breaker pole unit and the second circuit breaker pole unit, and extends into the leakage protection unit. The linkage member is located on the side of the lever where the avoidance groove is provided. When a leakage fault occurs, the lever pushes the linkage member, so that the linkage member drives the first circuit breaker pole unit and the second circuit breaker pole unit to trip.

[0020] Preferably, the second spring includes a second rotating portion, and a second swing rod and a second fixed rod respectively arranged on the second rotating portion. The second side plate is provided with a second mounting post. The second rotating portion is sleeved on the second mounting post. The second swing rod and the second fixed rod are arranged on the side of the second rotating portion away from the lever. The second fixed rod is connected with the test resistor. The second swing rod serves as the second moving contact portion. The second swing rod is located between the push rod of the lever and the second static contact portion of the first spring. The push rod of the lever is used to push the second swing rod, so that the second swing rod drives the second moving contact portion to contact the second static contact portion of the first spring.

[0021] Preferably, the second swing rod is provided with an avoidance rod and a bent rod. The avoidance rod is arranged parallel to the side of the second swing rod away from the second side plate. The bent rod is connected between the avoidance rod and the second swing rod. The bent rod is arranged parallel to the axis of the second rotating portion, and the bent rod is arranged perpendicular to the second static contact portion. The bent rod serves as the second moving contact portion and is used to contact the second static contact portion of the second spring when the first circuit breaker pole unit and / or the second circuit breaker pole unit is closed. A second avoidance groove is provided between the avoidance rod, the bent rod and the second swing rod. The second avoidance groove is used to avoid the second static contact portion when the first circuit breaker pole unit and / or the second circuit breaker pole unit is opened.

[0022] Preferably, the first spring includes a first rotating portion, and a first swing rod and a first fixed rod respectively arranged on the first rotating portion. The first fixed rod constitutes the second static contact portion. The second side plate is provided with a third mounting post. The first rotating portion is sleeved on the third mounting post. The first swing rod and the first fixed rod are oppositely arranged on both sides of the first rotating portion.

[0023] Preferably, the first swing rod includes a first swing section, a second swing section, and a third swing section. The second swing section is connected between the first swing section and the third swing section. The first swing section is connected to the first rotating part and is located below the pressing boss of the test button. The second swing section and the third swing section are located on the side of the pressing boss close to the conductive sheet. The third swing section is provided with a bending structure serving as the first moving contact part. The pressing boss is used to press the first swing section so that the third swing section drives the first moving contact part to contact the first static contact part.

[0024] Preferably, the conductive sheet includes a fixing sheet and a contact sheet. The fixing sheet is arranged in the first breaker pole unit. An installation groove for fixing the fixing sheet is provided on the side of the first side plate away from the leakage protection unit. A first through hole for passing through the contact sheet is provided on one side of the installation groove. The contact sheet is inserted into the leakage protection unit through the first through hole. The contact sheet serves as the first static contact part and contacts the first spring. The fixing sheet is connected to the first wiring terminal of the first breaker pole unit through a first lead wire.

[0025] Preferably, the test resistor includes a first lead and a second lead. The first lead is connected to the second static contact part of the second spring. The second lead is connected to a second lead wire. The second side plate is provided with a second through hole for passing through the second lead wire. The second lead wire is inserted into the second breaker pole unit through the second through hole and is connected to the second wiring terminal of the second breaker pole unit.

[0026] Preferably, the housing includes a first housing structure, a second housing structure, a third housing structure, and a fourth housing structure arranged in sequence. The first housing structure, the second housing structure, the third housing structure, and the fourth housing structure respectively include the first side plate, the first partition, the second partition, and the second side plate. The first housing structure and the second housing structure form a cavity for accommodating the first breaker pole unit. The second housing structure and the third housing structure form a cavity for accommodating the leakage protection unit. The third housing structure and the fourth housing structure form a cavity for accommodating the second breaker pole unit.

[0027] The residual current operated circuit breaker of the present utility model forms the first break point of the test circuit through the first moving contact part and the first static contact part, and forms the second break point of the test circuit through the second static contact part and the second moving contact part. It is not necessary to separately set the two break points of the test circuit in different circuit breaker pole units. For example, it is not necessary to separately set the first break point and the second break point in the first circuit breaker pole unit and the second circuit breaker pole unit, nor is it necessary to set one of the break points in the leakage protection unit and the other break point in the first circuit breaker pole unit or the second circuit breaker pole unit. By setting both the first break point and the second break point in the leakage protection unit, not only can the structure of the test mechanism be made more compact, reducing the volume of the test mechanism, but also the influence of the test mechanism on the first circuit breaker pole unit and the second circuit breaker pole unit can be reduced. The main circuits and test circuits of the first circuit breaker pole unit and the second circuit breaker pole unit belong to different current circuits. The break points are set outside the first circuit breaker pole unit and the second circuit breaker pole unit, so there is no need to consider the electrical clearance problem between the main circuit and the test circuit, and it is also possible to avoid the short-circuit problem between different circuits caused by improper assembly, thus avoiding the failure of the circuit breaker.

[0028] In addition, on the basis of concentrating the test mechanism in the leakage protection unit, through the reasonable layout of the positions of the conductive sheet, the first spring, the second spring, the test resistor, the lever and the test button, it also has the characteristics of a compact structure and a small volume.

[0029] In addition, a second avoidance groove is provided between the avoidance rod, the bent rod and the second swing rod. The second avoidance groove is used to avoid the second static contact part when the first circuit breaker pole unit and / or the second circuit breaker pole unit is tripped, preventing the second moving contact part from accidentally touching the second static contact part in the tripped state. Description of the Drawings

[0030] Figure 1 is the electrical schematic diagram of the test circuit of the present utility model;

[0031] Figure 2 is the structural schematic diagram of the residual current operated circuit breaker of the present utility model;

[0032] Figure 3 is the exploded view of the housing of the residual current operated circuit breaker of the present utility model;

[0033] Figure 4 is the structural schematic diagram of the test mechanism of the present utility model;

[0034] Figure 5 is the matching schematic diagram of the test mechanism and the second partition board of the present utility model;

[0035] Figure 6 is the structural schematic diagram of the test button of the present utility model;

[0036] Figure 7 It is a schematic structural diagram of the lever of the present utility model;

[0037] Figure 8 It is a schematic structural diagram of the third partition board of the present utility model;

[0038] Figure 9 It is the present utility model Figure 8 A schematic structural diagram of the other side of the third partition board in;

[0039] Figure 10 It is a schematic structural diagram of the second spring of the present utility model;

[0040] Figure 11 It is a schematic structural diagram of the first spring of the present utility model;

[0041] Figure 12 It is a schematic diagram of the cooperation between the first terminal and the conductive sheet of the present utility model;

[0042] Figure 13 It is a schematic diagram of the cooperation between the first terminal, the conductive sheet and the first partition board of the present utility model;

[0043] Figure 14 It is a schematic structural diagram of the second terminal of the present utility model;

[0044] Figure 15 It is a schematic structural diagram of the test resistor of the present utility model;

[0045] Figure 16 It is a schematic diagram of the cooperation between the second terminal, the test resistor and the second partition board of the present utility model;

[0046] In the figure, there are a first side plate 1, a second side plate 4, a first partition 2, a second partition 3, a first terminal 5, a first spring 6, a test button 7, a lever 8, a second spring 9, a test resistor 10, a second terminal 11, a test circuit 100, a leakage detection module 12, an actuator 13, a zero-sequence current transformer 14, a first handle 15, a mounting groove 2-1, a first through hole 2-3, a button hole 3-1, a third mounting post 3-2, a first mounting post 3-3, a second mounting post 3-4, a fixing groove 3-5, a second through hole 3-6, a first lead 5-1, a conductive sheet 5-2, a first static contact portion 5-21, a fixing piece 5-22, a first rotating portion 6-1, a second static contact portion 6-2, a first swinging section 6-3, a second swinging section 6-4, a third swinging section 6-5, a first moving contact portion 6-6, a pressing portion 7-1, a pressing rod 7-2, a sliding rod 7-3, a support rod 7-4, a pressing boss 7-5, an avoidance groove 8-1, a driving structure 8-2, a pushing structure 8-3, a rotating hole 8-4, a first fixing post 8-5, a second fixing post 8-6, a third fixing post 8-7, a linkage member 8-11, a linkage hole 8-12, a second jump buckle 8-21, a transmission rod 8-23, a second handle 8-24, a push rod 8-31, a push plate 8-32, a second rotating portion 9-1, a second swinging rod 9-2, a second fixing rod 9-3, a second moving contact portion 9-31, an avoidance rod 9-32, a second avoidance groove 9-33, a pushing groove 9-30, a first pin 10-1, a second pin 10-2, and a second lead 11-1. Detailed implementation manners

[0047] The following embodiments given in conjunction with the accompanying drawings further illustrate the detailed implementation manners of the residual current operated circuit breaker of the present invention. The residual current operated circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0048] As Figures 1-4 shown, the residual current operated circuit breaker of the present invention includes a housing and a test mechanism. The housing includes a first side plate 1 and a second side plate 4 arranged oppositely, and a first partition 2 and a second partition 3 respectively arranged between the first side plate 1 and the second side plate 4. A first circuit breaker pole unit is provided between the first side plate 1 and the first partition 2, a leakage protection unit is provided between the first partition 2 and the second partition 3, and a second circuit breaker pole unit is provided between the second partition 3 and the second side plate 4;

[0049] The test mechanism is used to detect whether the leakage protection function works properly. The test mechanism includes a conductive sheet 5-2, a first spring 6, a second spring 9, a test resistor 10, a lever 8 and a test button 7. The conductive sheet 5-2, the test resistor 10, the first spring 6 and the second spring 9 are all connected in series in the test circuit 100. The two ends of the test circuit 100 are respectively connected to the first terminal 5 of the first breaker pole unit and the second terminal 11 of the second breaker pole unit. In this embodiment, the conductive sheet 5-2 and the second spring 9 are respectively connected to the first terminal 5 of the first breaker pole unit and the second terminal 11 of the second breaker pole unit;

[0050] The conductive sheet 5-2 and the first spring 6 are respectively provided with a first static contact portion 5-21 and a first moving contact portion 6-6. When the first breaker pole unit and the second breaker pole unit conduct the main circuit, the lever 8 drives the first moving contact portion 6-6 to contact the first static contact portion 5-21;

[0051] The first spring 6 and the second spring 9 are respectively provided with a second static contact portion 6-2 and a second moving contact portion 9-31. The test button 7 is provided with a pressing portion 7-1. The pressing portion 7-1 extends from the button hole 3-1 to the outside of the housing. When the test button 7 is pressed, it drives the second moving contact portion 9-31 to contact the second static contact portion 6-2. The first static contact portion 5-21, the first spring 6, the second spring 9, the test resistor 10, the lever 8 and the test button 7 are all arranged between the first partition 2 and the second partition 3. In this embodiment, the second spring 9 is connected to the second terminal 11 through the test resistor 10. Of course, the second spring 9 can also be directly connected to the second terminal 11 or through other conductors. The test resistor 10 can be connected between the conductive sheet 5-2 and the first terminal 5, or connected at other positions, as long as it is connected in series in the test circuit 100.

[0052] The residual current operated circuit breaker of the present utility model forms the first break point of the test circuit 100 through the first moving contact part 6-6 and the first static contact part 5-21, and forms the second break point of the test circuit 100 through the second static contact part 6-2 and the second moving contact part 9-31. It is not necessary to set the two break points of the test circuit 100 in different circuit breaker pole units respectively. For example, it is not necessary to set the first break point and the second break point in the first circuit breaker pole unit and the second circuit breaker pole unit respectively, nor is it necessary to set one of the break points in the leakage protection unit and the other break point in the first circuit breaker pole unit or the second circuit breaker pole unit. By setting both the first break point and the second break point in the leakage protection unit, not only can the structure of the test mechanism be made more compact, reducing the volume of the test mechanism, but also the influence of the test mechanism on the first circuit breaker pole unit and the second circuit breaker pole unit can be reduced. The main circuits and test circuits of the first circuit breaker pole unit and the second circuit breaker pole unit belong to different current circuits. The break points are set outside the first circuit breaker pole unit and the second circuit breaker pole unit, so there is no need to consider the electrical clearance problem between the main circuit and the test circuit, and it is also possible to avoid the short-circuit problem between different circuits caused by improper assembly, thus avoiding the failure of the circuit breaker.

[0053] Both the first circuit breaker pole unit and the second circuit breaker pole unit include a first handle 15, an operating mechanism, a moving contact connected to the operating mechanism, and a static contact. The first handle 15 drives the moving contact to close or break with the static contact through the operating mechanism, realizing the closing and opening of the circuit breaker. The first handles 15 of the first circuit breaker pole unit and the second circuit breaker pole unit are linked, so that the two circuit breaker pole units close and open synchronously. The operating mechanism includes a lock catch and a trip catch that are engaged in a snap-fit manner. The first circuit breaker pole unit and / or the second circuit breaker pole unit further include an overload protection module and a short-circuit protection module. When an overload or short-circuit fault occurs in the main circuit, the overload protection module and the short-circuit protection module drive the lock catch to rotate, so that the lock catch and the trip catch are disengaged from the snap-fit, and the operating mechanism trips to drive the moving contact to break with the static contact, realizing the tripping and opening; the lock catches of the operating mechanisms of the first circuit breaker pole unit and the second circuit breaker pole unit are directly or indirectly linked, so that the two circuit breaker pole units trip synchronously. This is the prior art in this field and will not be elaborated further.

[0054] Such as Figure 1As shown, the leakage protection unit further includes a leakage detection module 12, an actuator 13, and a zero-sequence current transformer 14, and the test circuit 100 passes through the zero-sequence current transformer 14. When closing, when the first handle 15 or the operating mechanism of the first breaker pole unit and / or the second breaker pole unit drives the moving contact to swing and close towards the static contact, the driving lever 8 is directly or indirectly driven to drive the first moving contact portion 6-6 to contact the first static contact portion 5-21. Only when the first breaker pole unit, the second breaker pole unit, and the leakage protection unit are all closed, and the test button 7 is pressed, will the two breakpoints be conducted. When both breakpoints are conducted, a simulated leakage signal is generated, causing the leakage detection module 12 to sense the leakage signal in the winding on the zero-sequence current transformer 14. After being amplified and processed by the leakage detection module 12, when the leakage signal meets the conditions, the leakage detection module 12 outputs an execution signal to the actuator 13, and the actuator 13 disconnects the main circuits of the first breaker pole unit, the second breaker pole unit, and the leakage protection unit. Successfully disconnecting the main circuit indicates that the leakage protection function is effective, otherwise it indicates that the leakage protection function fails. The leakage detection module 12, the actuator 13, and the zero-sequence current transformer 14 of this embodiment are also arranged between the first partition 2 and the second partition 3. The zero-sequence current transformer 14 is connected to the leakage detection module 12, and the leakage detection module 12 is connected to the actuator 13. When the leakage detection module 12 detects leakage through the zero-sequence current transformer 14, the actuator 13 directly or indirectly drives the latches of the operating mechanisms of the first breaker pole unit and the second breaker pole unit, causing the two breaker pole units to trip and open, disconnecting the main circuit. The actuator 13 is usually an electromagnetic release.

[0055] As Figure 3 shown, the housing of this embodiment includes a first housing structure, a second housing structure, a third housing structure, and a fourth housing structure arranged in sequence from right to left. The first housing structure, the second housing structure, the third housing structure, and the fourth housing structure respectively include the first side plate 1, the first partition 2, the second partition 3, and the second side plate 4. The first housing structure and the second housing structure form a cavity for accommodating the first breaker pole unit, the second housing structure and the third housing structure form a cavity for accommodating the leakage protection unit, and the third housing structure and the fourth housing structure form a cavity for accommodating the second breaker pole unit.

[0056] The leakage protection unit includes a second handle 8-24. The lever 8 is rotatably installed between the second housing structure and the third housing structure. The second handle 8-24 is directly or indirectly connected to the lever 8. When the first handle 15 moves to the closing position, it closes the first breaker pole unit and the second breaker pole unit, and at the same time drives the second handle 8-24 to move to the second closing position. The second handle 8-24 drives the lever 8 to rotate, driving the first moving contact portion 6-6 to contact the first static contact portion 5-21.

[0057] Preferably, the second handle 8-24 is separately provided from the first handle 15 of the first breaker pole unit and the second breaker pole unit. The second handle 8-24 is located on the closing path of the first handle 15 of the first breaker pole unit and the second breaker pole unit. When the first handle 15 moves from the opening position to the closing position, it drives the second handle 8-24 to move to the second closing position. When the first handle 15 moves from the closing position to the opening position, it does not drive the second handle 8-24. Thus, when the first handle 15 moves towards the opening position, the second handle 8-24 automatically resets and moves to the second opening position under the drive of the elastic member, driving the lever 8 to rotate and reset, and the first moving contact portion 6-6 is separated from the first static contact portion 5-21; or, the second handle 8-24 remains in the second closing position, and the lever 8 remains in the state where the first moving contact portion 6-6 is in contact with the first static contact portion 5-21. In this way, when the first breaker pole unit and the second breaker pole unit normally open, or trip and open due to overload and short circuit, the second handle 8-24 will not move to the second opening position, which is used to indicate that no leakage fault has occurred. When a leakage fault occurs, the actuator 13 directly or indirectly drives the latches of the operating mechanisms of the first breaker pole unit and the second breaker pole unit, causing the two breaker pole units to trip and open, and the first handle 15 moves to the opening position; at the same time, the actuator 13 directly or indirectly drives the lever 8, causing the first moving contact portion 6-6 to be separated from the first static contact portion 5-21, and the second handle 8-24 resets to the second opening position, which is used to indicate that a leakage fault has occurred. Of course, the second handle 8-24 can also be manually moved to the second closing position and the second opening position; in addition, the second handle 8-24 is integrally provided or fixedly connected to the first handle 15 of the first breaker pole unit and the second breaker pole unit.

[0058] Such as Figure 5As shown in the figure, a second trip latch 8-21 and a second locking latch are respectively rotatably provided on the lever 8. The second trip latch 8-21 is connected to a second handle 8-24 through a transmission rod 8-23. When the second trip latch 8-21 and the second locking latch are latched and cooperated with each other, the second handle 8-24 drives the lever 8 to rotate around the first mounting post 3-3 through the transmission rod 8-23, the second trip latch 8-21 and the second locking latch, driving the first moving contact portion 6-6 to contact or separate from the first static contact portion 5-21. When the second handle 8-24 moves to the second closing position and drives the lever 8 to make the first moving contact portion 6-6 contact with the first static contact portion 5-21, if the second locking latch is driven to release the latching cooperation with the second trip latch 8-21, that is, if the second trip latch 8-21 and the second locking latch are unlatched, then the second handle 8-24 moves to the second opening position, and the lever 8 also resets to separate the first moving contact portion 6-6 from the first static contact portion 5-21. The second locking latch and the second trip latch 8-21 can be unlatched by the actuator 13 during leakage, or can be unlatched by the operating mechanism when the first circuit breaker pole unit and the second circuit breaker pole unit are unlatched.

[0059] As Figure 5 As shown in the figure, the first spring 6 is arranged below the test button 7, and the second spring 9 is arranged below the first spring 6. The first static contact portion 5-21 and the first moving contact portion 6-6 of the first spring 6 are relatively arranged on both sides of the movement direction of the test button 7. The conductive sheet 5-2, the lever 8 and the first moving contact portion 6-6 of the first spring 6 are arranged on one side of the movement direction of the test button 7, and on the other side opposite to the movement direction of the test button 7, there are arranged the first static contact portion 5-21 of the first spring 6, the second moving contact portion 9-31 of the second spring 9 and the test resistor 10. The first moving contact portion 6-6 is located above the first static contact portion 5-21 of the conductive sheet 5-2. The test button 7 is provided with a pressing rod located above the first moving contact portion 6-6, and the pressing rod is used to drive the first moving contact portion 6-6 to contact with the first static contact portion 5-21. The second static contact portion 6-2 is located on the side of the second moving contact portion 9-31 away from the lever 8, and on the other side opposite to the second moving contact portion 9-31, there is a push rod connected to the lever 8, and the push rod is used to drive the second moving contact portion 9-31 to contact with the second static contact portion 6-2. Based on the centralized arrangement of the test mechanism in the leakage protection unit in this embodiment, through the reasonable layout of the positions of the conductive sheet 5-2, the first spring 6, the second spring 9, the test resistor 10, the lever 8 and the test button 7, it also has the characteristics of compact structure and small volume.

[0060] As Figure 4 、 6As shown, the test button 7 is provided with a pressing rod 7-2 located on the side of the lever 8. There is an avoidance space for passing through the first spring 6 between the pressing rod 7-2 and the lever 8. The first moving contact portion 6-6 and the first static contact portion 5-21 of the first spring 6 are relatively arranged on both sides of the avoidance space. The first moving contact portion 6-6 is arranged on the side of the avoidance space close to the conductive sheet 5-2. When the test button 7 is pressed, it drives the pressing rod 7-2 to push the first spring 6, so that the first moving contact portion 6-6 of the first spring 6 contacts the first static contact portion 5-21 on the conductive sheet 5-2, thereby conducting the first break point of the test circuit 100.

[0061] Further, the test button 7 includes a sliding rod 7-3, and a pressing portion 7-1 and a support rod 7-4 relatively arranged at both ends of the sliding rod 7-3. The sliding rod 7-3 is slidably arranged on the second partition 3. The second partition 3 is provided with a chute (not shown in the figure) that slidably cooperates with the sliding rod 7-3. The pressing portion 7-1 extends outside the housing. The middle of the sliding rod 7-3 is connected to the support rod 7-4. The end of the support rod 7-4 is provided with the pressing rod 7-2. The pressing rod 7-2, the support rod 7-4, and the sliding rod 7-3 are arranged orthogonally to each other. The pressing rod 7-2 is provided with a protruding pressing boss 7-5 on the side close to the lever 8. The pressing boss 7-5 is used to push the first spring 6, so that the first moving contact portion 6-6 of the first spring 6 contacts the first static contact portion 5-21 on the conductive sheet 5-2.

[0062] As Figure 4 shown, the lever 8 is provided with an avoidance groove 8-1, and a driving structure 8-2 and a pushing structure 8-3 relatively arranged on both sides of the avoidance groove 8-1. The pushing structure 8-3 is used to push the second moving contact portion 9-31 to contact the second static contact portion 6-2. The avoidance groove 8-1 is used to avoid the first spring 6 when the pushing structure 8-3 pushes the second moving contact portion 9-31. By providing the avoidance groove 8-1 on the lever 8, the pushing structure 8-3 can bypass the first spring 6 to push the second spring 9.

[0063] As Figure 4 、 7As shown, the drive structure 8-2 is provided with a drive plate in the shape of a flat plate. The drive plate is provided with a rotation hole 8-4, a first fixing post 8-5, a second fixing post 8-6, and a third fixing post 8-7. The first fixing post 8-5 is used to limit the second latch. The second fixing post 8-6 is connected to a return spring (not shown in the figure). The two ends of the return spring are respectively clamped on the groove wall of the second partition plate 3 and the third fixing post 8-7. After the second latch is disengaged and unlocked from the second trip latch 8-21, the return spring drives the lever 8 to reset by acting on the third fixing post 8-7. The second partition plate 3 is provided with a first mounting post 3-3. The rotation hole 8-4 is sleeved on the first mounting post 3-3, so that the lever 8 is rotatably mounted on the first mounting post 3-3. The first fixing post 8-5 and the second fixing post 8-6 are arranged on the side of the drive structure 8-2 close to the first side plate 1. The third fixing post 8-7 is arranged on the side of the drive structure 8-2 close to the second partition plate 3, and the third fixing post 8-7 is coaxially arranged with the second fixing post 8-6. The second trip latch 8-21 and the second latch are respectively arranged on the first fixing post 8-5 and the first mounting post 3-3. When the second trip latch 8-21 and the second latch are buckled and matched with each other, the second handle 8-24 drives the lever 8 to rotate around the first mounting post 3-3 through the transmission rod 8-23, the second trip latch 8-21, and the second latch.

[0064] Further, the pushing structure 8-3 includes a push rod 8-31. The push rod 8-31 is connected to the drive structure 8-2 through a connecting rod. An avoidance groove 8-1 is provided between the push rod 8-31, the connecting rod, and the drive structure 8-2. Opposite two push plates 8-32 are provided at the end of the push rod 8-31 away from the connecting rod. One end of each of the two push plates 8-32 is connected to the push rod 8-31 respectively. The ends of the two push plates 8-32 away from the push rod 8-31 are arranged at intervals. A pushing groove 9-30 for sleeving on the second moving contact part 9-31 of the second spring 9 is provided between the two push plates 8-32, which can prevent the second spring 9 from separating from the push rod 8-31. Of course, the push rod 8-31 may not be provided, but instead, the pushing groove 9-30 may be directly provided on the push rod 8-31, or only one side of the push plate 8-32 may be provided, and the L-shaped pushing groove 9-30 may be used to replace the V-shaped pushing groove 9-30, or a through hole for passing through the second spring 9 may be provided on the push rod 8-31, all of which fall within the protection scope of the present invention.

[0065] As Figure 5As shown, the residual current operated circuit breaker is provided with a linkage member 8-11. The linkage member 8-11 is linked with the latches of the operating mechanisms of the first circuit breaker pole unit and the second circuit breaker pole unit, and extends into the leakage protection unit. The second partition 3 is provided with a linkage hole 8-12 corresponding to the linkage member 8-11. The linkage member 8-11 extends into the leakage protection unit through the linkage hole 8-12, and the linkage member 8-11 is located on the side of the lever 8 provided with an avoidance groove 8-1. When a leakage fault occurs, the actuator 13 directly or indirectly drives the lever 8. The lever 8 pushes the linkage member 8-11, causing the linkage member 8-11 to drive the latches of the operating mechanisms of the first circuit breaker pole unit and the second circuit breaker pole unit, so that the first circuit breaker pole unit and the second circuit breaker pole unit trip.

[0066] As Figure 10 As shown, the second spring 9 is a torsion spring. The second spring 9 includes a second rotating part 9-1, and a second swing rod 9-2 and a second fixed rod 9-3 respectively arranged on the second rotating part 9-1. The second partition 3 is provided with a second mounting post 3-4. The second rotating part 9-1 is sleeved on the second mounting post 3-4, so that the second spring 9 is rotatably mounted on the second partition 3. The second partition 3 is provided with a fixing groove 3-5 for fixing the second fixed rod 9-3, and the two are in clearance fit or interference fit. The second swing rod 9-2 and the second fixed rod 9-3 are arranged on the side of the second rotating part 9-1 away from the lever 8. The second fixed rod 9-3 is connected to the test resistor 10. The second swing rod 9-2 serves as the second moving contact part 9-31. The second swing rod 9-2 is located between the push rod 8-31 of the lever 8 and the second static contact part 6-2 of the first spring 6. The push rod 8-31 of the lever 8 is used to push the second swing rod 9-2, so that the second swing rod 9-2 drives the second moving contact part 9-31 to contact the second static contact part 6-2 of the first spring 6.

[0067] Furthermore, the second swing rod 9-2 is provided with an avoidance rod 9-32 and a bent rod. The avoidance rod 9-32 is arranged parallel to the side of the second swing rod 9-2 away from the second partition 3. The bent rod is connected between the avoidance rod 9-32 and the second swing rod 9-2. The bent rod is arranged parallel to the axis of the second rotating part 9-1, and the bent rod is arranged perpendicular to the second static contact part 6-2. The bent rod serves as the second moving contact part 9-31 and contacts the second static contact part 6-2 of the second spring 9 when the first circuit breaker pole unit and / or the second circuit breaker pole unit is closed. A second avoidance groove 9-33 is provided between the avoidance rod 9-32, the bent rod and the second swing rod 9-2. The second avoidance groove 9-33 is used to avoid the second static contact part 6-2 when the first circuit breaker pole unit and / or the second circuit breaker pole unit is opened, preventing the second moving contact part 9-31 from accidentally contacting the second static contact part 6-2 in the open state.

[0068] As shown Figure 4 , 11 As shown, the first spring 6 includes a first rotating portion 6-1, and a first swing rod and a first fixed rod respectively arranged on the first rotating portion 6-1. The first fixed rod constitutes the second static contact portion 6-2. The second partition plate 3 is provided with a third mounting post 3-2. The first rotating portion 6-1 is sleeved on the third mounting post 3-2, so that the first spring 6 is rotatably mounted on the second partition plate 3. The first swing rod and the first fixed rod are oppositely arranged on both sides of the first rotating portion 6-1.

[0069] Further, the first swing rod includes a first swing section 6-3, a second swing section 6-4 and a third swing section 6-5. The second swing section 6-4 is connected between the first swing section 6-3 and the third swing section 6-5. The first swing section 6-3 is connected to the first rotating portion 6-1, and the first swing section 6-3 is located below the pressing boss 7-5 of the test button 7. The second swing section 6-4 and the third swing section 6-5 are located on the side of the pressing boss 7-5 close to the conductive sheet 5-2. The third swing section 6-5 is provided with a bending structure as the first moving contact portion 6-6. The pressing boss 7-5 is used to press the first swing section 6-3, so that the third swing section 6-5 drives the first moving contact portion 6-6 to contact the first static contact portion 5-21.

[0070] As shown Figures 12-13 As shown, the conductive sheet 5-2 includes a fixed sheet 5-22 and a contact sheet. The fixed sheet 5-22 is arranged in the first circuit breaker pole unit. The side surface of the first side plate 1 away from the leakage protection unit is provided with a mounting groove 2-1 for fixing the fixed sheet 5-22. The fixed sheet 5-22 is in interference fit with the mounting groove 2-1. A first through hole 2-3 for passing through the contact sheet is provided on one side of the mounting groove 2-1. The contact sheet is inserted into the leakage protection unit from the first through hole 2-3. The contact sheet serves as the first static contact portion 5-21 and contacts the first spring 6. The fixed sheet 5-22 is connected to the first terminal 5 of the first circuit breaker pole unit through a first lead 5-1. Of course, the fixed sheet 5-22 can also be arranged in the leakage protection unit, which belongs to the protection scope of the present invention.

[0071] As shown Figures 14-16 , the test resistor 10 includes a first lead 10-1 and a second lead 10-2. The first lead 10-1 is connected to the second static contact portion 6-2 of the second spring 9. The second lead 10-2 is connected to the second lead 11-1. The second partition plate 3 is provided with a second through hole 3-6 for passing through the second lead 11-1. The second lead 11-1 is inserted into the second circuit breaker pole unit from the second through hole 3-6 and connected to the second terminal 11 of the second circuit breaker pole unit. Of course, the test resistor 10 can also be arranged in the second circuit breaker pole unit, which belongs to the protection scope of the present invention.

[0072] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which it is habitually placed during use. It is only for the convenience of description and does not indicate that the device or component referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating relative importance.

[0073] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A residual current operated circuit breaker, comprising a housing and a testing mechanism, characterized in that: The housing comprises a first side plate (1) and a second side plate (4) arranged opposite to each other, and a first partition plate (2) and a second partition plate (3) respectively arranged between the first side plate (1) and the second side plate (4); a first circuit breaker pole unit is arranged between the first side plate (1) and the first partition plate (2); a leakage protection unit is arranged between the first partition plate (2) and the second partition plate (3); and a second circuit breaker pole unit is arranged between the second partition plate (3) and the second side plate (4); The test mechanism comprises a conductive sheet (5-2), a first spring (6), a second spring (9), a test resistor (10), a lever (8) and a test button (7); the conductive sheet (5-2), the test resistor (10), the first spring (6) and the second spring (9) are all connected in series in a test loop (100); and two ends of the test loop (100) are respectively connected to a first connection terminal (5) of a first circuit breaker pole unit and a second connection terminal (11) of a second circuit breaker pole unit; The conductive sheet (5-2) and the first spring (6) are respectively provided with a first static contact portion (5-21) and a first dynamic contact portion (6-6); when the first circuit breaker pole unit and the second circuit breaker pole unit conduct the main circuit, the lever (8) drives the first dynamic contact portion (6-6) to contact the first static contact portion (5-21); The first spring (6) and the second spring (9) are respectively provided with a second static contact portion (6-2) and a second dynamic contact portion (9-31); the test button (7) is provided with a pressing portion (7-1) extending outside the housing for pressing; when the test button (7) is pressed, the second dynamic contact portion (9-31) is driven to contact the second static contact portion (6-2); the first static contact portion (5-21), the first spring (6), the second spring (9), the test resistor (10), the lever (8) and the test button (7) are all arranged between the first partition plate (2) and the second partition plate (3).

2. The residual current operated circuit breaker according to claim 1, characterized in that: The first circuit breaker pole unit and the second circuit breaker pole unit both comprise a first handle (15), an operating mechanism, a moving contact and a static contact connected to the operating mechanism. The first handle (15) drives the moving contact and the static contact to close or disconnect through the operating mechanism. The first circuit breaker pole unit and the first handle (15) of the second circuit breaker pole unit are linked. The operating mechanism comprises a snap-fit ​​lock and a trip lock. The locks of the operating mechanisms of the first circuit breaker pole unit and the second circuit breaker pole unit are directly or indirectly linked. The leakage protection unit comprises a second handle (8-24). The second handle (8-24) is connected to the lever (8). When the first handle (15) moves to the closing position, it drives the second handle (8-24) to move to the second closing position. The second handle (8-24) drives the lever (8) to rotate, driving the first moving contact portion (6-6) to contact the first static contact portion (5-21).

3. The residual current operated circuit breaker according to claim 2, characterized in that: The second handle (8-24) is separately arranged from the first handle (15) of the first circuit breaker pole unit and the second circuit breaker pole unit. The second handle (8-24) is located on the closing path of the first handle (15) of the first circuit breaker pole unit and the second circuit breaker pole unit. When the first handle (15) moves from the opening position to the closing position, it drives the second handle (8-24) to move to the second closing position. When the first handle (15) moves from the closing position to the opening position, it will not drive the second handle (8-24).

4. The residual current operated circuit breaker according to claim 3, characterized in that: The leakage protection unit further comprises a leakage detection module (12), an actuator (13) and a zero-sequence current transformer (14) arranged between the first partition (2) and the second partition (3); when the leakage detection module (12) detects leakage through the zero-sequence current transformer (14), the actuator (13) directly or indirectly drives the lock of the operating mechanism of the first circuit breaker pole unit and the second circuit breaker pole unit to trip and open the two circuit breaker pole units, and the first handle (15) moves to the open position; at the same time, the actuator (13) directly or indirectly drives the lever (8) to separate the first moving contact part (6-6) from the first static contact part (5-21), and the second handle (8-24) is reset to the second open position.

5. The residual current operated circuit breaker according to claim 2, characterized in that: The lever (8) is rotatably provided with a second jump buckle (8-21) and a second lock buckle, respectively. The second jump buckle (8-21) is connected to the second handle (8-24) through a transmission rod (8-23). ​​When the second jump buckle (8-21) and the second lock buckle are engaged with each other, the second handle (8-24) drives the lever (8) to rotate around the first mounting column (3-3) through the transmission rod (8-23), the second jump buckle (8-21) and the second lock buckle, driving the first moving contact part (6-6) to contact or separate from the first static contact part (5-21); when the second handle (8-24) moves to a second closing position, driving the lever (8) to make the first moving contact part (6-6) contact with the first static contact part (5-21), if the second jump buckle (8-21) and the second lock buckle are released, the second handle (8-24) moves to a second opening position, and the lever (8) is reset to separate the first moving contact part (6-6) from the first static contact part (5-21).

6. The residual current operated circuit breaker according to claim 1, characterized in that: The first spring (6) is arranged below the test button (7), the second spring (9) is arranged below the first spring (6), the first static contact portion (5-21) and the first dynamic contact portion (6-6) of the first spring (6) are relatively arranged on both sides of the movement direction of the test button (7), the conductive sheet (5-2), the lever (8) and the first dynamic contact portion (6-6) of the first spring (6) are arranged on one side of the movement direction of the test button (7), the first static contact portion (5-21) of the first spring (6), the second dynamic contact portion (9-31) of the second spring (9) and the test resistor (10) are arranged on the other side opposite to the movement direction of the test button (7), and the second spring (9) is connected to the second spring (9) through the test resistor (10). The first movable contact portion (6-6) is located above the first static contact portion (5-21) of the conductive sheet (5-2); the test button (7) is provided with a pressure rod (7-2) located above the first movable contact portion (6-6); the pressure rod (7-2) is used to drive the first movable contact portion (6-6) to contact the first static contact portion (5-21); the second static contact portion (6-2) is located on the side of the second movable contact portion (9-31) away from the lever (8); a push rod (8-31) connected to the lever (8) is provided on the other side opposite to the second movable contact portion (9-31); the push rod (8-31) is used to drive the second movable contact portion (9-31) to contact the second static contact portion (6-2).

7. The residual current operated circuit breaker according to claim 1, characterized in that: The lever (8) is provided with an avoidance groove (8-1), and a driving structure (8-2) and a pushing structure (8-3) arranged on both sides of the avoidance groove (8-1) relative to each other, the pushing structure (8-3) being used to push the second moving contact part (9-31) to contact the second static contact part (6-2), and the avoidance groove (8-1) being used to avoid the first spring (6) when the pushing structure (8-3) pushes the second moving contact part (9-31).

8. The residual current operated circuit breaker according to claim 7, characterized in that: The pushing structure (8-3) comprises a push rod (8-31), the push rod (8-31) is connected to the driving structure (8-2) via a connecting rod, an avoidance groove (8-1) is provided between the push rod (8-31), the connecting rod and the driving structure (8-2), and a pushing groove (9-30) for sleeved on a second moving contact portion (9-31) of a second spring (9) is provided at an end of the push rod (8-31) away from the connecting rod.

9. The residual current operated circuit breaker according to claim 7, characterized in that: The driving structure (8-2) is provided with a flat driving plate, on which a rotating hole (8-4), a first fixing column (8-5), a second fixing column (8-6) and a third fixing column (8-7) are provided. The second partition plate (3) is provided with a first mounting column (3-3). The rotating hole (8-4) is sleeved on the first mounting column (3-3), so that the lever (8) is rotatably mounted on the first mounting column (3-3). The first fixing column (8-5) and the second fixing column (8-6) are arranged on the side of the driving structure (8-2) close to the first side plate (1). The third fixing column (8-7) is arranged on the side of the driving structure (8-2) close to the second side plate (4), and the third fixing column (8-7) is coaxially arranged with the second fixing column (8-6). The first fixing column (8-5) and the first mounting column (3-3) are respectively provided with a second jump buckle (8-21) and a second lock buckle.

10. The residual current operated circuit breaker according to claim 1, characterized in that: The test button (7) is provided with a pressure rod (7-2) located on the side of the lever (8); an escape space for passing the first spring (6) is provided between the pressure rod (7-2) and the lever (8); a first moving contact portion (6-6) and a first static contact portion (5-21) of the first spring (6) are relatively arranged on both sides of the escape space; the first moving contact portion (6-6) is arranged on a side of the escape space close to the conductive sheet (5-2); when the test button (7) is pressed, the pressure rod (7-2) is driven to push the first spring (6), so that the first moving contact portion (6-6) of the first spring (6) contacts the first static contact portion (5-21) on the conductive sheet (5-2).

11. The residual current operated circuit breaker according to claim 10, characterized in that: The test button (7) comprises a sliding rod (7-3), and a pressing portion (7-1) and a support rod (7-4) arranged at two ends of the sliding rod (7-3) relative to each other. The sliding rod (7-3) is slidably arranged on the second partition plate (3), the pressing portion (7-1) extends outside the shell, the sliding rod (7-3) is connected to the middle part of the support rod (7-4), the end of the support rod (7-4) is provided with the pressing rod (7-2), the pressing rod (7-2), the support rod (7-4) and the sliding rod (7-3) are arranged orthogonally to each other, and the pressing rod (7-2) is provided with a raised pressing boss (7-5) on the side close to the lever (8), and the pressing boss (7-5) is used to push the first spring (6) so that the first moving contact portion (6-6) of the first spring (6) contacts the first static contact portion (5-21) on the conductive sheet (5-2).

12. The residual current operated circuit breaker according to claim 7, characterized in that: A linkage member (8-11) is provided, the linkage member (8-11) is linked with the lock of the operating mechanism of the first circuit breaker pole unit and the second circuit breaker pole unit, and extends into the leakage protection unit, and the linkage member (8-11) is located on the side of the lever (8) provided with the avoidance groove (8-1), and when a leakage fault occurs, the lever (8) pushes the linkage member (8-11), so that the linkage member (8-11) drives the first circuit breaker pole unit and the second circuit breaker pole unit to trip.

13. The residual current operated circuit breaker according to claim 1, characterized in that: The second spring (9) comprises a second rotating part (9-1), and a second swinging rod (9-2) and a second fixed rod (9-3) respectively arranged on the second rotating part (9-1); the second side plate (4) is provided with a second mounting column (3-4); the second rotating part (9-1) is sleeved on the second mounting column (3-4); the second swinging rod (9-2) and the second fixed rod (9-3) are arranged on a side of the second rotating part (9-1) away from the lever (8); the second fixed rod (9- 3) is connected to the test resistor (10), the second swing rod (9-2) serves as the second moving contact portion (9-31), the second swing rod (9-2) is located between the push rod (8-31) of the lever (8) and the second static contact portion (6-2) of the first spring (6), and the push rod (8-31) of the lever (8) is used to push the second swing rod (9-2), so that the second swing rod (9-2) drives the second moving contact portion (9-31) to contact the second static contact portion (6-2) of the first spring (6).

14. The residual current operated circuit breaker according to claim 13, characterized in that: The second swing rod (9-2) is provided with an avoidance rod (9-32) and a bending rod. The avoidance rod (9-32) is arranged in parallel on the side of the second swing rod (9-2) away from the second side plate (4). The bending rod is connected between the avoidance rod (9-32) and the second swing rod (9-2). The bending rod is arranged in parallel with the axis of the second rotating part (9-1), and the bending rod is arranged perpendicularly to the second static contact part (6-2). The bending rod serves as the second moving contact part (9-31) and is used to contact the second static contact part (6-2) of the second spring (9) when the first circuit breaker pole unit and / or the second circuit breaker pole unit are closed. A second avoidance groove (9-33) is provided between the avoidance rod (9-32), the bending rod and the second swing rod (9-2). The second avoidance groove (9-33) is used to avoid the second static contact part (6-2) when the first circuit breaker pole unit and / or the second circuit breaker pole unit are opened.

15. The residual current operated circuit breaker according to claim 1, characterized in that: The first spring (6) comprises a first rotating part (6-1), and a first swinging rod and a first fixed rod respectively arranged on the first rotating part (6-1), the first fixed rod constituting the second static contact part (6-2), the second side plate (4) is provided with a third mounting column (3-2), the first rotating part (6-1) is sleeved on the third mounting column (3-2), and the first swinging rod and the first fixed rod are arranged on two sides of the first rotating part (6-1) opposite to each other.

16. The residual current operated circuit breaker according to claim 15, characterized in that: The first swinging rod comprises a first swinging section (6-3), a second swinging section (6-4) and a third swinging section (6-5); the second swinging section (6-4) is connected between the first swinging section (6-3) and the third swinging section (6-5); the first swinging section (6-3) is connected to the first rotating part (6-1); the first swinging section (6-3) is located below a pressing boss (7-5) of the test button (7); the second swinging section (6-4) and the third swinging section (6-5) are located on a side of the pressing boss (7-5) close to the conductive sheet (5-2); the third swinging section (6-5) is provided with a bending structure serving as a first moving contact part (6-6); the pressing boss (7-5) is used to press the first swinging section (6-3) so that the third swinging section (6-5) drives the first moving contact part (6-6) to contact the first static contact part (5-21).

17. The residual current operated circuit breaker according to claim 1, characterized in that: The conductive sheet (5-2) comprises a fixing sheet (5-22) and a contact sheet. The fixing sheet (5-22) is arranged in the first circuit breaker pole unit. A mounting groove (2-1) for fixing the fixing sheet (5-22) is provided on the side of the first side plate (1) away from the leakage protection unit. A first through hole (2-3) for passing the contact sheet is provided on one side of the mounting groove (2-1). The contact sheet is inserted into the leakage protection unit through the first through hole (2-3). The contact sheet contacts the first spring (6) as a first static contact portion (5-21). The fixing sheet (5-22) is connected to the first wiring terminal (5) of the first circuit breaker pole unit through a first lead wire (5-1).

18. The residual current operated circuit breaker according to claim 1, characterized in that: The test resistor (10) comprises a first pin (10-1) and a second pin (10-2), the first pin (10-1) being connected to a second static contact portion (6-2) of a second spring (9), the second pin (10-2) being connected to a second lead wire (11-1), the second side plate (4) being provided with a second through hole (3-6) for passing the second lead wire (11-1), the second lead wire (11-1) being inserted from the second through hole (3-6) into the second circuit breaker pole unit and connected to a second connection terminal (11) of the second circuit breaker pole unit.

19. The residual current operated circuit breaker according to claim 1, characterized in that: The shell comprises a first shell structure, a second shell structure, a third shell structure and a fourth shell structure which are arranged in sequence, wherein the first shell structure, the second shell structure, the third shell structure and the fourth shell structure respectively comprise the first side plate (1), the first partition plate (2), the second partition plate (3) and the second side plate (4), the first shell structure and the second shell structure form a cavity for accommodating a first circuit breaker pole unit, the second shell structure and the third shell structure form a cavity for accommodating a leakage protection unit, and the third shell structure and the fourth shell structure form a cavity for accommodating a second circuit breaker pole unit.

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