Installation structure of earth leakage protection module

Abstract

The utility model discloses a mounting structure of an electric leakage protection module, which comprises a plurality of circuit breakers and the electric leakage protection module, the electric leakage protection module is spliced with the plurality of circuit breakers, and one end of the electric leakage protection module spliced with the circuit breakers is provided with a plurality of rigid first conductive plates. Corresponding ends of the plurality of circuit breakers are provided with rigid second conductive plates, one end of the electric leakage protection module is provided with an insertion block or a slot, and one end of each circuit breaker is provided with a slot or an insertion block which is in insertion fit with the insertion block or the slot of the electric leakage protection module along the longitudinal direction. The first conductive plate and the second conductive plate can be stacked together in the longitudinal direction while the electric leakage protection module and the circuit breaker are connected in an inserted mode through the inserting block and the inserting groove, the first conductive plate and the second conductive plate are connected and fixed through screws, an opening is formed in the upper portion of the splicing position of the circuit breaker and the electric leakage protection module, and a cover plate is arranged at the opening. The utility model has the advantages of simple assembly process and strong reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of low voltage electrical, specifically relates to a mounting structure of leakage protection module. BACKGROUND

[0002] The leakage protection module is a common electrical safety protection device, usually used with the circuit breaker, can control the circuit breaker to cut off the circuit in time when the circuit appears the leakage fault. The core component of the leakage protection module usually includes the zero sequence transformer, the control circuit board (integrated signal amplification element). When the circuit is normally connected and has no leakage, the firewire and the zero line current size are equal, the direction is opposite, the zero sequence transformer internal magnetic field cancels out each other, will not induct effective secondary current; when the circuit has the leakage, the firewire and the zero line current are unbalanced, the zero sequence transformer will induct the secondary current proportional to the leakage current at this moment. The secondary current is transmitted to the control circuit board, is amplified through the integrated amplification element, when the signal reaches the preset protection threshold, will trigger the trip of the circuit breaker to produce the action, finally controls the circuit breaker to cut off the circuit, realizes the leakage protection function.

[0003] The Chinese invention patent discloses a circuit breaker with leakage protection function (CN106504957B), including a plurality of circuit breaker units, a leakage detection unit and a tripping and opening unit, the plurality of circuit breaker units are sequentially spliced into the circuit breaker unit group from left to right, the tripping and opening unit is spliced on the left side of the circuit breaker unit group, the tripping and opening unit is equipped with the control circuit board and the electric tripping mechanism, the control circuit board is connected with the electric tripping mechanism, the electric tripping mechanism is connected with the linkage rod of each circuit breaker unit, and the electric tripping mechanism controls each circuit breaker unit to open through the driving linkage rod rotation. The leakage detection unit is spliced with the circuit breaker unit group to keep the relative position fixed and will not move, and the electric connection between the leakage detection unit and the circuit breaker unit still needs to be realized through the conductive connecting line, the conductive connecting line needs to be connected through the first wire hole of the leakage detection unit, the second wire hole of the circuit breaker unit group respectively, and the circuit breaker unit is connected and fixed to the conductive connecting line through the terminal post.

[0004] In the above invention patent, the conductive connecting line is flexible, the leakage detection unit and the circuit breaker unit group are only fixed by the structure of the shell, and there is a problem of unreliable connection. Moreover, when splicing and assembling, the end of the conductive connecting line needs to be inserted along the second wire hole and fixed by the connecting post, and then the connection between the shells of the leakage detection unit and the circuit breaker unit group can be performed, so that the assembly operation is relatively troublesome. If the length of the conductive connecting line is too long, the conductive connecting line is easy to bend after splicing, and if the length is too short, the movement range between the leakage detection unit and the circuit breaker unit group is limited, which affects the splicing of the shell part. In addition, when wiring, the screwdriver needs to be inserted downward through the top opening of the circuit breaker unit group to tighten the connecting post, and in combination with the disclosed Figure 1 、 Figure 3 It can be known that the top opening is always exposed during product use, which affects the appearance of the product and also has certain safety hazards. Utility model content

[0005] In view of the above technical problems, the utility model provides a leakage protection module mounting structure which is simple in assembly process and high in reliability.

[0006] The leakage protection module mounting structure of the utility model, including multiple circuit breakers, leakage protection modules, multiple circuit breakers are spliced along the linear direction, leakage protection modules are spliced with multiple circuit breakers simultaneously, one end of leakage protection modules spliced with circuit breakers is provided with multiple rigid first conductive plates, the corresponding end of circuit breakers is provided with rigid second conductive plates matched with first conductive plates for conductive connection, one end of leakage protection modules is provided with an insertion block or an insertion slot, one end of multiple circuit breakers is provided with an insertion slot or an insertion block matched with the insertion block or the insertion slot of leakage protection modules for vertical plug-in cooperation, the insertion slot or the insertion block is formed by adjacent circuit breakers, first conductive plates and second conductive plates are stacked together along the vertical direction through the plug-in cooperation of the insertion block and the insertion slot between leakage protection modules and circuit breakers, first conductive plates and second conductive plates are fixed through screw connection between first conductive plates and second conductive plates, first conductive plates and second conductive plates are respectively provided with first connecting holes and second connecting holes for screw connection, an opening for screwdriver insertion to tighten the screw is arranged above the splicing position of circuit breakers and leakage protection modules, and a cover plate is arranged at the opening.

[0007] In assembly, the slot and the block are longitudinally inserted and fitted together between the leakage protection module and the plurality of circuit breakers, the first conductive plate and the second conductive plate are longitudinally stacked together, the first connecting hole and the second connecting hole of the first conductive plate and the second conductive plate are aligned, then the screw is inserted into the first connecting hole and the second connecting hole of the first conductive plate and the second conductive plate through the opening, the first conductive plate and the second conductive plate are locked and fixed, the first conductive plate and the second conductive plate are pressed and contacted, then the opening is closed by the cover plate, the assembly process is simple, after the assembly is completed, on the one hand, the insertion and fitting of the slot and the block can position the leakage protection module and the plurality of circuit breakers, on the other hand, the connection structure of the screw and the first conductive plate and the second conductive plate can also position the leakage protection module and the plurality of circuit breakers, thus having better connection reliability. The cover plate can shield the opening and prevent foreign matters from entering, thus improving the overall appearance and electrical safety of the product.

[0008] Further, the plurality of openings at the splicing position of the plurality of circuit breakers and the leakage protection module are connected together, the cover plate is one and is connected at the plurality of openings at the same time, thus reducing the number of cover plates and facilitating the assembly of the cover plates.

[0009] Further, the two sides of the plurality of openings are connected to form continuous side grooves, the two sides of the cover plate are guided and inserted and fitted with the side grooves on the two sides of the openings, and the side grooves are provided with insertion openings for the cover plate at the most distal circuit breakers in the splicing direction. In assembly, the cover plate is inserted between the plurality of circuit breakers and the leakage protection module through the insertion openings, and in the insertion process, the two sides of the cover plate in the insertion direction are guided and inserted and fitted with the side grooves on the two sides of the openings, thus having a simple structure and being convenient to disassemble and assemble.

[0010] Further, the leakage protection module comprises a built-in zero sequence transformer, the other end of the leakage protection module is provided with a plurality of terminal blocks, the plurality of first conductive plates and the plurality of terminal blocks are connected through the conductive pieces arranged in the inner hole of the zero sequence transformer, the mounting structure further comprises a controller spliced at the most distal end of the plurality of circuit breakers in the splicing direction, the controller comprises an extension part protruding towards the end of the circuit breaker, the extension part is spliced at one side of the leakage protection module, the controller and the plurality of circuit breakers are integrally spliced to form an L-shaped structure, the leakage protection module is embedded in the gap of the L-shaped structure, the splicing position of the extension part and the leakage protection module is respectively provided with a first communication port and a second communication port, the controller is internally provided with a control circuit board and a release, the secondary winding on the zero sequence transformer is connected with the control circuit board through the first communication port and the second communication port, the control circuit board is connected with the release, the control circuit board is integrated with a signal processing related circuit, which can amplify the secondary current, the release is connected with the plurality of circuit breakers, and the plurality of circuit breakers can be simultaneously driven to open.

[0011] Further, the terminal seat and the first conductive plate are at least four groups, the zero sequence mutual inductor is located in the middle position of the arrangement direction of the four groups of terminal seat and the first conductive plate, and the two groups of terminal seat and the first conductive plate adjacent to the zero sequence mutual inductor are connected through the conductive row arranged in the inner hole of the zero sequence mutual inductor, the conductive row is integrally connected with the first conductive plate, and the conductive row is integrally formed, the other groups of terminal seat and the first conductive plate away from the zero sequence mutual inductor are connected through the soft wire arranged in the inner hole of the zero sequence mutual inductor, the soft wire and the first conductive plate are welded, and the cooperation of the soft wire and the conductive row is more suitable for being arranged in the narrow inner hole of the zero sequence mutual inductor, so that the internal structure of the leakage protection module is more compact.

[0012] Further, the leakage protection module comprises a shell, a first support, a second support and a baffle, one end of the shell towards the circuit breaker is provided with a notch, the baffle is fixed at one end of the shell and cooperates with the notch to be closed, the plug or the slot is arranged on the baffle, the first support and the second support are contained in the space formed by the shell and the baffle, a plurality of cavities for containing and separating adjacent terminal seats and adjacent terminal seats and zero sequence mutual inductors are connected between the first support and the second support, so as to ensure the safety distance, the soft wire is arranged along the gap between adjacent cavities and below the cavities, the structure is compact, and the bottom of the shell is provided with a heat dissipation vent hole, so as to improve the heat dissipation effect of the leakage protection module. When assembling, the terminal seat, the zero sequence mutual inductor and the conductive part are first installed between the first support and the second support, then they are placed into the notch of the shell, and finally the baffle is installed at the outer end of the notch.

[0013] Further, the bottom of the plurality of circuit breakers is spliced to form a guide rail connecting groove, and the bottom of at least one of the circuit breakers is movably provided with a movable buckle matched with the guide rail, the movable buckle comprises a clamping end and an operating end, the clamping end of the movable buckle is arranged towards the guide rail connecting groove, and the operating end extends out from the other side of the bottom of the leakage protection module, so as to facilitate hand holding operation, the movable buckle can be locked with the guide rail when being pushed towards the guide rail connecting groove, and the movable buckle can be unlocked when being pulled away from the guide rail connecting groove, and the bottom of the circuit breaker and the bottom of the leakage protection module are respectively provided with a first support seat and a second support seat matched with the guide connection of the movable buckle, so as to improve the activity effect of the movable buckle.

[0014] Further, the movable buckle is provided with elastic clamping heads on both sides, and the first support seat at the bottom of the circuit breaker or the second support seat at the bottom of the leakage protection module comprises two clamping grooves matched with the elastic clamping heads to respectively hold the movable buckle in the locked and unlocked positions.

[0015] Further, the first conductive plate is stacked above the second conductive plate, the stacking mode can limit the downward movement of the leakage protection module relative to the circuit breaker in the longitudinal direction, one end of the circuit breaker is provided with a supporting table, the lower end of the second conductive plate is matched with the supporting table to form a supporting cooperation, and the second conductive plate can be prevented from being deformed and bent under stress, so that the connection reliability between the leakage protection module and the circuit breaker is improved.

[0016] Further, the first connecting hole in the first conductive plate is a non-threaded hole, the second connecting hole in the second conductive plate is a threaded hole, the upper end of the second connecting hole in the second conductive plate is provided with a tapered flange, the diameter of the first connecting hole in the first conductive plate is greater than or equal to the maximum diameter of the tapered flange, the threaded part of the screw can be conveniently arranged in the second connecting hole in the second conductive plate and matched with the second connecting hole in the form of a threaded cooperation, and when the screw is tightened, the first conductive plate is pushed and pressed on the second conductive plate by the head of the screw. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the utility model embodiment;

[0018] Figure 2 It is a structure exploded view of the utility model embodiment;

[0019] Figure 3 It is an assembly schematic view of the cover plate of the utility model embodiment;

[0020] Figure 4 It is a sectional view of the utility model embodiment;

[0021] Figure 5 It is an internal structure view of the controller of the utility model embodiment;

[0022] Figure 6 It is a structure view of the leakage protection module of the utility model embodiment;

[0023] Figure 7 It is a structure exploded view of the leakage protection module of the utility model embodiment;

[0024] Figure 8 It is an assembly schematic view of the leakage protection module of the utility model embodiment;

[0025] Figure 9 It is an assembly schematic view of the zero sequence mutual inductor of the utility model embodiment;

[0026] Figure 10 It is a sectional view of the leakage protection module of the utility model embodiment;

[0027] Figure 11The utility model discloses an embodiment of the structure diagram of bottom part,

[0028] Figure 12 The utility model discloses an embodiment of the sectional view of movable buckle assembly,

[0029] Figure 13 The utility model discloses an embodiment of the structure diagram of movable buckle. DETAILED DESCRIPTION

[0030] The utility model discloses the mounting structure's embodiment of leakage protection module, as Figures 1-13 Shown, including multiple circuit breaker 1, leakage protection module 2, multiple circuit breaker 1 is spliced along the linear direction, and leakage protection module 2 is spliced with multiple circuit breaker 1 simultaneously, and the one end of leakage protection module 2 is spliced with circuit breaker 1 is provided with multiple rigid first conducting plate 21, and the corresponding one end of circuit breaker 1 is provided with the rigid second conducting plate 11 of cooperation conducting connection with first conducting plate 21, the one end of leakage protection module 2 is provided with the plug block 31, and the one end of multiple circuit breaker 1 is provided with the insertion slot 32 of the plug block 31 of leakage protection module 2 along the longitudinal direction with the plug cooperation of constituting, the insertion slot 32 is constituted by the splicing of adjacent circuit breaker 1, namely, the insertion slot 32 can be divided into two parts, and the two parts are located on two adjacent circuit breaker 1 respectively, when the two circuit breaker 1 is spliced, the two parts of insertion slot 32 form an integral whole, constitute insertion slot 32, and leakage protection module 2 and circuit breaker 1 can be stacked together along the longitudinal direction through the plug block 31 and insertion slot 32 of plug-in at the same time, and first conducting plate 21 and second conducting plate 11 are fixed through screw connection, and first conducting plate 21 and second conducting plate 11 are respectively provided with first connecting hole 211 and second connecting hole 111 that can be connected by screw, and the splicing place of circuit breaker 1 and leakage protection module 2 is provided with the opening 33 that can be inserted with screwdriver to tighten the screw, and the opening 33 is provided with cover plate 34.

[0031] In the embodiment, the plug block 31 and the insertion slot 32 are both long strip structures extending along the longitudinal direction, and when the plug block 31 and the insertion slot 32 are plugged in, the plug block 31 and the insertion slot 32 are limited to relative movement along the longitudinal direction only through the limiting cooperation therebetween, and in other embodiments, the positions of the plug block 31 and the insertion slot 32 can also be transposed.

[0032] During assembly, the slots 32 and plugs 31 between the leakage current protection module 2 and the multiple circuit breakers 1 are inserted together longitudinally, so that the first conductive plate 21 and the second conductive plate 11 are stacked together longitudinally, and the first connecting holes 211 and the second connecting holes 111 of the first conductive plate 21 and the second conductive plate 11 are aligned. Then, screws are inserted into the first connecting holes 211 and the second connecting holes 111 of the first conductive plate 21 and the second conductive plate 11 along the opening 33 to lock and fix the first conductive plate 21 and the second conductive plate 11, so that the first conductive plate 21 and the second conductive plate 11 are pressed into contact. Then, the opening 33 is closed by the cover plate 34. The assembly process is simple. After the assembly is completed, on the one hand, the insertion and engagement of the slots 32 and the plugs 31 can form a positioning between the leakage current protection module 2 and the multiple circuit breakers 1. On the other hand, the connection structure of the screws and the first conductive plate 21 and the second conductive plate 11 can also form a positioning between the leakage current protection module 2 and the multiple circuit breakers 1, thus having better connection reliability. The cover plate 34 can block the opening 33 and prevent foreign objects from entering, thereby improving the overall aesthetics and electrical safety of the product.

[0033] Multiple openings 33 at the splicing points of multiple circuit breakers 1 and leakage protection modules 2 are connected together. The cover plate 34 is one and is connected to multiple openings 33 at the same time, which can reduce the number of cover plates 34 and facilitate the assembly of cover plates 34.

[0034] Multiple openings 33 are connected on both sides to form continuous side grooves 330. The two sides of the cover plate 34 form a guide insertion fit with the side grooves 330 on both sides of the openings 33. The side grooves 330 have an insertion port 331 on the circuit breaker 1 at the farthest end along the splicing direction for the cover plate 34 to be inserted. The insertion port 331 is located on the side of the multiple circuit breakers away from the controller 4. During assembly, the cover plate 34 is inserted into the multiple circuit breakers 1 and the leakage protection module 2 along the insertion port 331. During the insertion process, the two sides of the cover plate 34 along the insertion direction form a guide insertion fit with the side grooves 330 on both sides of the openings 33. The structure is simple and easy to disassemble and assemble.

[0035] The leakage current protection module 2 includes a built-in zero-sequence current transformer 22. Multiple terminal blocks 23 are provided at the other end of the leakage current protection module 2. Multiple first conductive plates 21 and multiple terminal blocks 23 are connected correspondingly through conductive components passing through the inner holes of the zero-sequence current transformer 22. The mounting structure also includes a controller 4 spliced ​​at the farthest end of multiple circuit breakers 1 along the splicing direction. The controller 4 includes an extension 41 protruding towards one end of the circuit breaker 1. The extension 41 is spliced ​​to one side of the leakage current protection module 2. The controller 4 and the multiple circuit breakers 1 are spliced ​​together in an L-shaped structure. The leakage current protection module 2 is embedded in the notch of the L-shaped structure. The extension 41 and... The splicing points of the leakage current protection module 2 have a first connection port 411 and a second connection port 24 respectively. The controller 4 has a built-in control circuit board 42 and a trip unit 43. The secondary winding of the zero-sequence current transformer 22 passes through the second connection port 24 and the first connection port 411 in sequence and is installed in the controller 4 and connected to the control circuit board 42. The control circuit board 42 is connected to the trip unit 43. The control circuit board 42 integrates signal processing related circuits, such as signal amplification circuits, which can amplify the induced secondary current and enable the trip unit 43 to work. The trip unit 43 is mechanically linked with multiple circuit breakers 1 and can drive multiple circuit breakers 1 to trip simultaneously.

[0036] The terminal blocks 23 and the first conductive plates 21 are arranged in four groups. The zero-sequence current transformer 22 is located in the middle of the arrangement direction of the four groups of terminal blocks 23 and the first conductive plates 21. The two groups of terminal blocks 23 and the first conductive plates 21 adjacent to the zero-sequence current transformer 22 are connected by a conductive busbar 251 passing through the inner hole of the zero-sequence current transformer 22. The conductive busbar 251 is integrally connected to the first conductive plate 21 and is integrally formed. The other groups of terminal blocks 23 and the first conductive plates 21 that are far away from the zero-sequence current transformer 22 are connected by a flexible wire 252 passing through the inner hole of the zero-sequence current transformer 22. Figure 7 (Illustrated by dashed lines) The flexible wire 252 and the first conductive plate 21 are welded together. The combination of the flexible wire 252 and the conductive busbar 251 is more suitable for passing through the narrow inner hole of the zero-sequence current transformer 22, which helps to make the internal structure of the leakage protection module 2 more compact.

[0037] The leakage current protection module 2 includes a housing 261, a first bracket 262, a second bracket 263, and a baffle 264. The housing 261 has a notch at one end facing the circuit breaker 1. The baffle 264 is fixed to one end of the housing 261 and cooperates with the notch to close it. The plug 31 is disposed on the baffle 264. The first bracket 262 and the second bracket 263 are accommodated in the space formed by the housing 261 and the baffle 264. The first bracket 262 and the second bracket 263 are connected to form a plurality of chambers 265 for accommodating and separating adjacent terminal blocks 23 and adjacent terminal blocks 23 and zero-sequence current transformers 22 to ensure a safe distance. The flexible wire 252 is arranged along the gaps 267 between adjacent chambers 265 and below the chambers 265, resulting in a compact structure. The bottom of the housing 261 is provided with heat dissipation and ventilation holes 266 to improve the heat dissipation effect of the leakage current protection module 2. During assembly, first install the terminal block 23, zero-sequence current transformer 22, conductive parts, etc. between the first bracket 262 and the second bracket 263, then place them into the recess of the outer casing 261, and finally install the baffle 264 on the outer end of the recess.

[0038] Multiple circuit breakers 1 are spliced ​​at their bottoms to form a guide rail connection groove 12. Two circuit breakers 1 have movable latches 5 at their bottoms that cooperate with the guide rail for positioning. Each movable latch 5 includes a latching end 51 and an operating end 52. The latching end 51 of the movable latch 5 faces the guide rail connection groove 12, and the operating end 52 extends from the bottom of the other side of the leakage protection module 2 for easy hand gripping and operation. When the movable latch 5 is pushed towards the guide rail connection groove 12, it can cooperate with the guide rail to lock. When the movable latch 5 is pulled away from the guide rail connection groove 12, it can be unlocked. The bottoms of the circuit breaker 1 and the leakage protection module 2 are respectively provided with a first support base 13 and a second support base 27 that cooperate with the movable latch 5 to improve the movement effect of the movable latch 5.

[0039] The movable latch 5 is provided with elastic latch heads 511 on both sides. The first support base 13 at the bottom of the circuit breaker 1 includes two slots 131 that cooperate with the elastic latch heads 511 to hold the movable latch 5 in the locked and unlocked positions respectively. In other embodiments, the two slots 131 may also be located on the second support base 27 at the bottom of the leakage protection module 2.

[0040] The first conductive plate 21 is stacked on top of the second conductive plate 11. This stacking method can restrict the leakage protection module 2 from moving longitudinally downward relative to the circuit breaker 1. One end of the circuit breaker 1 has a support platform 14. The lower end of the second conductive plate 11 forms a support cooperation with the support platform 14, which can prevent the second conductive plate 11 from deforming and bending under force, which is beneficial to improving the connection reliability between the leakage protection module 2 and the circuit breaker 1. The support platform 14 is provided with a clearance hole 141 for the lower end of the screw to be inserted, which facilitates the screw to be inserted and connected.

[0041] The first connecting hole 211 on the first conductive plate 21 is a non-threaded hole, and the second connecting hole 111 on the second conductive plate 11 is a threaded hole. The upper end of the second connecting hole 111 on the second conductive plate 11 has a tapered flared opening 112. The diameter of the first connecting hole 211 on the first conductive plate 21 is greater than or equal to the minimum diameter of the tapered flared opening 112. The threaded part of the screw can be easily inserted into the second connecting hole 111 of the second conductive plate 11 through the first connecting hole 211 of the first conductive plate 21 and form a threaded engagement with it. When the screw is tightened, its head pushes the first conductive plate 21 to press against the second conductive plate 11. Of course, the diameter of the screw head should be greater than the diameter of the first connecting hole 211 of the first conductive plate 21.

[0042] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. An installation structure for a residual current protection module, comprising multiple circuit breakers and a residual current protection module, wherein the multiple circuit breakers are spliced ​​along a linear direction, and the residual current protection module is simultaneously spliced ​​with the multiple circuit breakers, characterized in that: The residual current device (RCD) module has multiple rigid first conductive plates at one end connected to the circuit breaker. The corresponding end of the circuit breaker has a rigid second conductive plate that connects and conducts electricity with the first conductive plates. One end of the RCD module has a plug or slot, and one end of each circuit breaker has a slot or plug that forms a longitudinally connected insertion mechanism with the plug or slot of the RCD module. The slot or plug is formed by splicing adjacent circuit breakers. The RCD module and circuit breaker are connected via the plug and slot, allowing the first and second conductive plates to be stacked longitudinally. The first and second conductive plates are fixed together by screws. The first and second conductive plates each have a first connecting hole and a second connecting hole for screws to pass through. Above the joint between the circuit breaker and the RCD module is an opening for a screwdriver to be inserted and tightened, and a cover plate is provided at the opening.

2. The installation structure of the leakage current protection module according to claim 1, characterized in that: Multiple openings at the junction of multiple circuit breakers and leakage protection modules are connected together, and the cover plate is one and connected to multiple openings simultaneously.

3. The installation structure of the leakage current protection module according to claim 2, characterized in that: Multiple openings are connected on both sides to form continuous side grooves. The two sides of the cover plate and the side grooves on both sides of the openings form a guide insertion fit. The side grooves have an insertion port on the circuit breaker at the farthest end along the splicing direction for the cover plate to be inserted.

4. The installation structure of the leakage current protection module according to claim 1, characterized in that: The leakage current protection module includes a built-in zero-sequence current transformer. Multiple terminal blocks are provided at the other end of the leakage current protection module. Multiple first conductive plates and multiple terminal blocks are connected correspondingly through conductive components passing through the inner holes of the zero-sequence current transformer. The mounting structure also includes a controller spliced ​​at the farthest end of multiple circuit breakers along the splicing direction. The controller includes an extension protruding towards one end of the circuit breaker. The extension is spliced ​​to one side of the leakage current protection module. The splicing point between the extension and the leakage current protection module has a first connection port and a second connection port, respectively. The controller has a built-in control circuit board and a trip unit. The secondary winding on the zero-sequence current transformer is connected to the control circuit board through the first and second connection ports. The control circuit board is connected to the trip unit.

5. The installation structure of the leakage current protection module according to claim 4, characterized in that: The terminal blocks and the first conductive plate are at least four sets. The zero-sequence current transformer is located in the middle of the arrangement direction of the four sets of terminal blocks and the first conductive plate. The conductive component includes a conductive bar and a flexible wire. The two sets of terminal blocks adjacent to the zero-sequence current transformer and the first conductive plate are connected by a conductive bar passing through the inner hole of the zero-sequence current transformer. The conductive bar is integrally connected to the first conductive plate. The other sets of terminal blocks far away from the zero-sequence current transformer and the first conductive plate are connected by a flexible wire passing through the inner hole of the zero-sequence current transformer. The flexible wire is welded to the first conductive plate.

6. The installation structure of the leakage current protection module according to claim 5, characterized in that: The leakage protection module includes a housing, a first bracket, a second bracket, and a baffle. The housing has a notch at one end facing the circuit breaker. The baffle is fixed to one end of the housing and closes with the notch. The plug or slot is disposed on the baffle. The first bracket and the second bracket are accommodated in the space formed by the housing and the baffle. The first bracket and the second bracket are connected to form multiple chambers for accommodating and separating adjacent terminals and adjacent terminals and zero-sequence current transformers. The flexible conductor is arranged along the gap between adjacent chambers and below the chambers.

7. The installation structure of the leakage current protection module according to claim 1, characterized in that: Multiple circuit breakers are spliced ​​together at their bottoms to form a guide rail connection groove. At least one of the circuit breakers is movably provided with a movable buckle that cooperates with the guide rail for positioning. The movable buckle includes a snap-fit ​​end and an operating end. The snap-fit ​​end of the movable buckle is positioned towards the guide rail connection groove, and the operating end extends out from the bottom of the other side of the leakage current protection module. The bottoms of the circuit breaker and the leakage current protection module are respectively provided with a first support base and a second support base that cooperate with the movable buckle for guiding connection.

8. The installation structure of the leakage current protection module according to claim 7, characterized in that: The movable buckle is provided with elastic locking heads on both sides. The first support base at the bottom of the circuit breaker or the second support base at the bottom of the leakage protection module includes two slots that cooperate with the elastic locking heads to keep the movable buckle in the locked and unlocked positions respectively.

9. The installation structure of the leakage current protection module according to claim 1, characterized in that: The first conductive plate is stacked on top of the second conductive plate. One end of the circuit breaker has a support platform. The lower end of the second conductive plate is supported by the support platform. The support platform is provided with a clearance hole for the lower end of a screw to be inserted.

10. The installation structure of the leakage current protection module according to claim 9, characterized in that: The first connecting hole on the first conductive plate is a non-threaded hole, the second connecting hole on the second conductive plate is a threaded hole, the upper end of the second connecting hole on the second conductive plate has a tapered flare, and the diameter of the first connecting hole on the first conductive plate is greater than or equal to the maximum diameter of the tapered flare.

Images