A modular residual current circuit breaker with a protective cover

Abstract

This utility model relates to a modular residual current circuit breaker with a protective cover, comprising a circuit breaker unit and a residual current protection unit. The circuit breaker unit includes a circuit breaker housing with terminal holes at both ends. The upper surface of the circuit breaker housing has mounting holes corresponding to the terminal positions within the housing. The residual current protection unit includes a residual current housing and a first and a second protective cover. The first protective cover is positioned over the end of the circuit breaker housing with the terminal holes and is connected to at least one of the circuit breaker housing and the residual current housing. The second protective cover is positioned over the mounting holes and the first protective cover and is connected to both the circuit breaker housing and the first protective cover. This utility model provides a modular residual current circuit breaker with a protective cover, featuring double protective covers to form a circumferentially enclosed structure for the terminals, preventing exposed wire ends from causing electric shock hazards.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an assembled residual current circuit breaker with a protective cover. Background Technology

[0002] As the most widely used core protective electrical appliance in the power system, the circuit breaker undertakes the key function of ensuring the safe operation of the power supply system and electrical equipment, and is an important guarantee for maintaining social electricity safety and people's daily life.

[0003] In particular, modular residual current circuit breakers (RCCBs) employ a modular design, integrating multiple circuit breaker units and residual current protection units. However, after assembly, the wire ends at the terminals between units may be exposed, posing a risk of electric shock. Furthermore, there is a risk of incorrectly tightening the terminals during installation. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art. This utility model provides a modular residual current circuit breaker with a protective cover device. At the wiring terminals of the circuit breaker unit and the residual current protection unit, a double protective cover is set to form a circumferentially closed structure for the wiring terminals, preventing exposed wire ends at the wiring terminals from causing electric shock hazards.

[0005] The technical solution of this utility model is as follows: A modular residual current circuit breaker with a protective cover device includes a circuit breaker unit and a residual current protection unit. The circuit breaker unit includes a circuit breaker housing with terminal holes at both ends. The upper end of the circuit breaker housing has mounting holes corresponding to the terminal positions inside the circuit breaker housing. The residual current protection unit includes a residual current housing located on one side of the circuit breaker housing and connected to it. It also includes a first protective cover and a second protective cover. The first protective cover is disposed on the end of the circuit breaker housing with the terminal holes and partially covers the residual current housing. The first protective cover is connected to at least one of the circuit breaker housing and the residual current housing. The second protective cover is disposed on the mounting holes and the first protective cover and is connected to the circuit breaker housing and the first protective cover.

[0006] By adopting the above technical solution, the first protective cover protects the connection between the circuit breaker unit and the leakage protection unit, forming a circumferentially closed structure for the wiring terminals. This ensures that the wire ends at the wiring terminals are not exposed after the unit is assembled, preventing the risk of electric shock caused by exposed wire ends. The second protective cover prevents the wiring terminals from being screwed on incorrectly during circuit breaker installation and protects the first protective cover from being disassembled. The connection between the protective cover and the housing, as well as the connection between the two protective covers, ensures that the structure is sturdy and not easy to fall off after the protective cover is installed. It also improves the overall aesthetics after assembly.

[0007] Further features of this invention: the first protective cover is provided with a post and a first connecting hook at one end facing the circuit breaker housing, the circuit breaker housing is provided with a slot, the leakage housing is provided with a first locking boss, the post is inserted into the slot and the first connecting hook is hooked onto the first locking boss to realize the installation of the first protective cover.

[0008] With the above-mentioned further configuration, the first protective cover, the circuit breaker housing, and the leakage housing can all be disassembled, which improves assembly efficiency and allows for quick disassembly during maintenance. During disassembly, external tools can be used to elastically deform the first connecting hook and disengage it from the first locking boss, thereby completing the disassembly of the first protective cover.

[0009] A further feature of this invention is that the first locking protrusion is provided with a first inclined surface.

[0010] Further configuration: A connecting chamber is provided on the side of the leakage current housing facing the circuit breaker housing. Two first locking protrusions are provided, located on the top and bottom walls of the connecting chamber respectively. Two first connecting hooks are provided, located on the inner wall of the first protective cover. When the first connecting hook is hooked on the corresponding first locking protrusion, the inner wall of the first protective cover abuts against the outer wall of the connecting chamber.

[0011] With the above-mentioned further configuration, the first connecting hook is easily positioned inside the first locking protrusion. During installation, the first connecting hook is inserted into the connecting cavity and pushes the first protective cover inward. When the first connecting hook slides to the first inclined surface, it will be squeezed and elastically deformed until the first connecting hook is positioned on the side wall of the first locking protrusion. During the pushing process, the plug is inserted into the slot on the circuit breaker housing, making the connection structure between the first protective cover and the leakage housing more stable, and limiting the position of the first protective cover so that it is not easy to shift after installation.

[0012] A further feature of this invention is that the connecting chamber is provided with a first through groove for an external tool to be inserted, and the first locking boss is located on one side of the first through groove.

[0013] With the above-mentioned further design, the first protective cover is easy and quick to assemble and disassemble. When disassembling, an external tool can be inserted into the first through groove and pressed against the first connecting hook to disengage it from the first locking protrusion, thus completing the disassembly of the first protective cover.

[0014] A further feature of this invention is that a positioning piece is provided on the side wall of the first protective cover, and a corresponding positioning groove is provided on the circuit breaker housing. When the first protective cover is installed on the circuit breaker housing, the positioning piece is inserted into the positioning groove.

[0015] By adopting the above-mentioned further settings, the stability of the first protective cover after installation is further improved, and it can be positioned in all directions to make it immovable.

[0016] A further improvement of this utility model: the second protective cover is provided with a connecting shaft and a second connecting hook, the first protective cover is provided with a second locking boss and a connecting channel, the second locking boss is located in the connecting channel, the connecting shaft is inserted into the mounting hole, and the second connecting hook passes through the connecting channel and hooks onto the second locking boss to realize the installation of the second protective cover. The second protective cover is located on the upper surface of the first protective cover and extends toward the leakage protection unit.

[0017] With the above-mentioned further design, the second protective cover can be detached and installed, which facilitates subsequent maintenance and disassembly, and the disassembly is convenient and can be quickly assembled and disassembled.

[0018] A further feature of this invention is that the second locking boss has a second inclined surface on the upper end face of the connecting channel portion.

[0019] The above-mentioned further design facilitates the second connecting hook to slide in and engage with the lower end face of the second locking boss.

[0020] A further feature of this invention is that the upper surface of the second protective cover is provided with a second through groove for inserting external tools, and the second connecting hook is located on one side of the second through groove so as to press the second connecting hook to make it elastically deformed.

[0021] The above-mentioned further design facilitates the disassembly of the second protective cover. When disassembling the two protective covers, the second protective cover is disassembled first, and then the first protective cover is disassembled. The second protective cover can cover the first locking protrusion so that it is not exposed.

[0022] A further improvement of this utility model: the circuit breaker housing includes a separate circuit breaker base and a circuit breaker cover plate, and the leakage current housing includes a separate leakage current base and a leakage current cover plate. The leakage current base has a connecting post on the side facing the circuit breaker base, and the circuit breaker base has a corresponding connecting hole. The connecting post is inserted into the connecting hole. The leakage current cover plate has a third connecting hook, and the circuit breaker cover plate has a corresponding latch. The third connecting hook is hooked into the latch.

[0023] With the above-mentioned further design, the connection structure between the circuit breaker housing and the leakage current housing is simple and easy to disassemble and assemble, but it does not affect the firmness of the connection. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model; Figure 2 This is a schematic diagram of one side of the circuit breaker base according to a specific embodiment of the present utility model; Figure 3 This is a schematic diagram of a leakage current protection unit according to a specific embodiment of the present utility model; Figure 4 This is an exploded view of the leakage current casing according to a specific embodiment of this utility model; Figure 5 This is a schematic diagram of the inner side of the leakage current housing in a specific embodiment of this utility model; Figure 6 This is a schematic diagram of the first protective cover according to a specific embodiment of the present utility model; Figure 7 This is a schematic diagram of the inner side of the first protective cover in a specific embodiment of the present utility model; Figure 8 This is a schematic diagram of the lower side of the second protective cover according to a specific embodiment of the present utility model; Figure 9 This is a schematic diagram of the second protective cover according to a specific embodiment of the present utility model; Figure 10 This is a schematic diagram of one side of the circuit breaker cover plate according to a specific embodiment of the present utility model; Figure 11 This is a partial cross-sectional view of a specific embodiment of the present utility model.

[0025] In the diagram, 1. Circuit breaker unit; 11. Circuit breaker housing; 111. Terminal hole; 112. Mounting hole; 113. Slot; 114. Positioning slot; 12. Circuit breaker base; 131. Connection hole; 13. Circuit breaker cover; 132. Bayonet; 2. Residual current protection unit; 21. Residual current housing; 211. First locking boss; 22. Residual current base; 221. Connecting post; 23. Residual current cover; 231. Third connecting hook; 24. Connecting chamber; 241. First inclined surface; 242. First through slot; 3. First protective cover; 31. Insert post; 32. First connecting hook; 33. Positioning piece; 34. Second locking boss; 341. Second inclined surface; 35. Connecting channel; 4. Second protective cover; 41. Connecting shaft; 42. Second connecting hook; 43. Second through slot. Detailed Implementation

[0026] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that all directional indicators (such as up, down, forward, backward, etc.) in the description of this utility model are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] like Figure 1-11As shown, a modular residual current circuit breaker with a protective cover includes a circuit breaker unit 1 and a residual current protection unit 2. The circuit breaker unit 1 includes a circuit breaker housing 11, with terminal holes 111 at both ends. The upper surface of the circuit breaker housing 11 has mounting holes 112 corresponding to the terminal positions within the housing. The residual current protection unit 2 includes a residual current housing 21 located on one side of the circuit breaker housing 11 and connected to it. It also includes a first protective cover 3 and a second protective cover 4. The first protective cover 3 covers the end of the circuit breaker housing 11 with the terminal holes 111 and partially covers the residual current housing 21, providing protection for the terminals on the circuit breaker housing and the connection between the circuit breaker housing and the residual current housing. The first protective cover 3 is connected to at least one of the circuit breaker housing 11 and the residual current housing 21. The connection can be with the circuit breaker housing, the leakage current housing, or both housings. In this embodiment, the first protective cover is connected to both housings. The second protective cover 4 is mounted on the mounting hole 112 and the first protective cover 3. The second protective cover 4 is connected to the circuit breaker housing 11 and the first protective cover 3. The first protective cover protects the connection between the circuit breaker unit 1 and the leakage current protection unit, forming a circumferentially closed structure for the wiring terminals. This prevents the wire ends at the wiring terminals from being exposed after the unit is assembled, thus preventing the risk of electric shock caused by exposed wire ends. The second protective cover can prevent the wiring terminals from being screwed in incorrectly during circuit breaker installation and protects the first protective cover from being disassembled. The connection between the protective cover and the housing, as well as the connection between the two protective covers, makes the structure of the protective cover sturdy after installation, preventing it from falling off. It also improves the overall aesthetics after assembly. Specifically, the connection structure between the circuit breaker housing 11 and the leakage current housing 21 is as follows: the circuit breaker housing 11 includes a separate circuit breaker base 12 and a circuit breaker cover 13, and the leakage current housing 21 includes a separate leakage current base 22 and a leakage current cover 23. The separate arrangement of the circuit breaker housing 11 and the leakage current housing 21 facilitates the disassembly and assembly of the internal structure. The leakage current base 22 has a connecting post 221 on the side facing the circuit breaker base 12, and the leakage current cover 23 has a third connecting hook 231. The circuit breaker cover 13 has a corresponding connecting hole 131 and a bayonet 132. The connecting post 221 is inserted into the connecting hole 131, and the third connecting hook 231 is hooked into the bayonet 132. The connection structure between the circuit breaker housing 11 and the leakage current housing 21 is simple and easy to disassemble and assemble, but it does not affect the firmness of the connection. The side of the circuit breaker housing 11 away from the leakage current unit 2 has a connecting port for connecting with other components.

[0031] The first protective cover 3 has a post 31 and a first connecting hook 32 at one end facing the circuit breaker housing 11. The circuit breaker housing 11 has a slot 113, and the leakage housing 21 has a first locking boss 211. The post 31 is inserted into the slot 113 and the first connecting hook 32 is hooked onto the first locking boss 211 to realize the installation of the first protective cover 3. The first protective cover 3 and the second protective cover 4 are both supported by elastically deformable materials with good toughness. Specifically, they can be made of plastic. The first protective cover 3 is detachable from both the circuit breaker housing 11 and the leakage housing 21, which improves assembly efficiency and allows for quick disassembly during maintenance. When disassembling, an external tool can be inserted to press against the first connecting hook 32, causing it to elastically deform and disengage from the first locking boss 211, thus completing the disassembly of the first protective cover 3.

[0032] The leakage current housing 21 has a connecting chamber 24 on the side facing the circuit breaker housing 11. Two first locking protrusions 211 are provided, located on the top and bottom walls of the connecting chamber 24 respectively. Two corresponding first connecting hooks 32 are provided on the inner wall of the first protective cover 3. When the first connecting hook 32 is engaged with the corresponding first locking protrusion 211, the inner wall of the first protective cover 3 abuts against the outer wall of the connecting chamber 24, making the connection structure between the first protective cover 3 and the leakage current housing 21 more stable and limiting the position of the first protective cover 3, preventing displacement after installation. The first locking protrusion 211 has a first inclined surface 241, facilitating the engagement of the first connecting hook 32 with the first locking protrusion 211. During installation, the first connecting hook 32 is inserted into the connecting chamber 24 and the first protective cover 3 is pushed inward. When the first connecting hook 32 slides to the first inclined surface 241, it will be squeezed and elastically deformed until it is pushed onto the side wall of the first locking protrusion 211. During the pushing process, the insert 31 is inserted into the slot 113 on the circuit breaker housing 11. The connecting chamber 24 is provided with a first through groove 242 for external tools to be inserted. The first locking protrusion 211 is located on one side of the first through groove 242. The first protective cover 3 is easy and quick to install and remove. When removing it, an external tool can be inserted into the first through groove 242 and pressed against the first connecting hook 32 to disengage it from the first locking protrusion 211, thus completing the removal of the first protective cover 3.

[0033] The first protective cover 3 is provided with a positioning piece 33 on its side wall, and the circuit breaker housing 11 is provided with a corresponding positioning groove 114. When the first protective cover 3 is installed on the circuit breaker housing 11, the positioning piece 33 is inserted into the positioning groove 114, which further improves the firmness of the first protective cover 3 after installation and can be positioned in all directions to make it immovable.

[0034] The second protective cover 4 is provided with a connecting shaft 41 and a second connecting hook 42. The first protective cover 3 is provided with a second locking boss 34 and a connecting channel 35. The second locking boss 34 is partially located in the connecting channel 35. The connecting shaft 41 is inserted into the mounting hole 112. The second connecting hook 42 passes through the connecting channel 35 and hooks onto the second locking boss 34 to realize the installation of the second protective cover 4. The second protective cover 4 is partially located on the upper end face of the first protective cover 3. The second protective cover 4 is detachable for easy subsequent maintenance and disassembly, and can be quickly disassembled and assembled. The upper end face of the second locking boss 34 located in the connecting channel 35 is provided with a second inclined surface 341 to facilitate the sliding and hooking of the second connecting hook 42. On the lower end face of the second locking boss 34, the second locking boss 34 can be integrally formed with the insert post 31; the upper end face of the second protective cover 4 is provided with a second through groove 43 for inserting external tools, and the second connecting hook 42 is located on one side of the second through groove 43 so as to press the second connecting hook 42 to make it elastically deform, which facilitates the disassembly of the second protective cover 4. When disassembling the two protective covers, the second protective cover 4 is disassembled first. A flathead screwdriver is inserted into the second through groove 43 and presses the second connecting hook 42 against the second locking boss 34 in the opposite direction, so that the second connecting hook 42 is disengaged from the second locking boss 34. Then it can be taken out upwards. Then the first protective cover 3 is disassembled. The second protective cover 4 can cover the first locking boss 211 so that it is not exposed.

Claims

1. A modular residual current circuit breaker with a protective cover, comprising a circuit breaker unit (1) and a residual current protection unit (2), wherein the circuit breaker unit (1) includes a circuit breaker housing (11), both ends of the circuit breaker housing (11) are provided with terminal holes (111), and the upper end face of the circuit breaker housing (11) is provided with mounting holes (112) corresponding to the terminal positions provided inside the circuit breaker housing (11); the residual current protection unit (2) includes a residual current housing (21), the residual current housing (21) is located on one side of the circuit breaker housing (11) and connected to the circuit breaker housing (11), characterized in that, It also includes a first protective cover (3) and a second protective cover (4). The first protective cover (3) is installed on one end of the circuit breaker housing (11) where the terminal hole (111) is located, and partially installed on the leakage housing (21). The first protective cover (3) is connected to at least one of the circuit breaker housing (11) and the leakage housing (21). The second protective cover (4) is installed on the mounting hole (112) and the first protective cover (3). The second protective cover (4) is connected to the circuit breaker housing (11) and the first protective cover (3).

2. The assembled residual current circuit breaker with protective cover according to claim 1, characterized in that, The first protective cover (3) is provided with a plug (31) and a first connecting hook (32) at one end facing the circuit breaker housing (11). The circuit breaker housing (11) is provided with a slot (113). The leakage housing (21) is provided with a first locking boss (211). The plug (31) is inserted into the slot (113) and the first connecting hook (32) is hooked onto the first locking boss (211) to realize the installation of the first protective cover (3).

3. The assembled residual current circuit breaker with protective cover according to claim 2, characterized in that, The first locking boss (211) is provided with a first inclined surface (241).

4. The assembled residual current circuit breaker with protective cover according to claim 2 or 3, characterized in that, The leakage housing (21) has a connecting chamber (24) on the side facing the circuit breaker housing (11). There are two first locking protrusions (211), which are located on the top and bottom walls of the connecting chamber (24) respectively. There are two first connecting hooks (32), which are located on the inner wall of the first protective cover (3). When the first connecting hook (32) is hooked on the corresponding first locking protrusion (211), the inner wall of the first protective cover (3) abuts against the outer wall of the connecting chamber (24).

5. The assembled residual current circuit breaker with protective cover according to claim 4, characterized in that, The connecting chamber (24) is provided with a first through groove (242) for external tools to be inserted, and the first locking boss (211) is located on one side of the first through groove (242).

6. The assembled residual current circuit breaker with protective cover according to claim 1, 2, 3, or 5, characterized in that, The first protective cover (3) has a positioning piece (33) on its side wall, and the circuit breaker housing (11) has a corresponding positioning groove (114). When the first protective cover (3) is installed on the circuit breaker housing (11), the positioning piece (33) is inserted into the positioning groove (114).

7. The assembled residual current circuit breaker with protective cover according to claim 1, 2, 3, or 5, characterized in that, The second protective cover (4) is provided with a connecting shaft (41) and a second connecting hook (42). The first protective cover (3) is provided with a second locking boss (34) and a connecting channel (35). The second locking boss (34) is partially located in the connecting channel (35). The connecting shaft (41) is inserted into the mounting hole (112). The second connecting hook (42) passes through the connecting channel (35) and hooks onto the second locking boss (34) to realize the installation of the second protective cover (4).

8. The assembled residual current circuit breaker with protective cover according to claim 7, characterized in that, The second locking boss (34) is located on the upper end face of the connecting channel (35) and has a second inclined surface (341).

9. The assembled residual current circuit breaker with protective cover according to claim 7, characterized in that, The upper end face of the second protective cover (4) is provided with a second through groove (43) for inserting external tools. The second connecting hook (42) is located on one side of the second through groove (43) so as to press the second connecting hook (42) to make it elastically deform in the connecting channel (35).

10. The assembled residual current circuit breaker with protective cover according to claim 1, 2, 3, or 5, characterized in that, The circuit breaker housing (11) includes a separate circuit breaker base (12) and a circuit breaker cover (13). The leakage current housing (21) includes a separate leakage current base (22) and a leakage current cover (23). The leakage current base (22) has a connecting post (221) on one side facing the circuit breaker base (12). The circuit breaker base (12) has a corresponding connecting hole (131). The connecting post (221) is inserted into the connecting hole (131). The leakage current cover (23) has a third connecting hook (231). The circuit breaker cover (13) has a corresponding bayonet (132). The third connecting hook (231) is hooked into the bayonet (132).

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