Plug-and-play bus system of outgoing circuit breaker

Abstract

The utility model discloses a bus system with a plug-and-play outlet circuit breaker, which relates to the field of bus system structures, and comprises an inlet circuit breaker, a test junction box, a bus bar and an outlet circuit breaker, a main line bus bar and two groups of branch bus bars connected in parallel to the main line bus bar are arranged in the test junction box, the inlet circuit breaker is connected to the main line bus bar, and the outlet circuit breaker is connected to the main line bus bar. One group or two groups of busbars are respectively connected with the branch busbars; the wire outlet end of the busbar is provided with a plurality of connecting branch strips; the outgoing line circuit breaker is connected with the connecting branch strip in an inserted mode. An insulated telescopic sleeve with deformation recovery capability is sleeved on the connecting branch strip, and one end of the telescopic sleeve is fixed relative to the bus bar; and the length of the telescopic sleeve is not less than that of the connecting branch strip. According to the utility model, loops can be increased, reduced and changed at will under the condition of uninterruptible power supply, wire connection is not needed, plug-and-play is realized, tedious wire disassembly and connection work is avoided, and safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of busbar system structure, in particular to a plug-and-play busbar system with an outlet circuit breaker. Background Art

[0002] A traditional distribution box is composed of switches, instruments, busbars and other parts connected by wires; wherein the switch includes an incoming circuit breaker and an outgoing circuit breaker, and multiple incoming circuit breakers, outgoing circuit breakers and busbars constitute a busbar system, that is, in the busbar system, the incoming circuit breaker is connected to the incoming end of the busbar through a wire, and multiple outgoing circuit breakers are connected to the outgoing end of the busbar through a wire, and one or more outgoing circuit breakers control a distribution circuit.

[0003] As can be seen from the above, the wiring in the busbar system is complicated and there are many wiring points for the wires, which makes the installation efficiency of the busbar system slow, and each additional wiring point increases a location where a fault may occur, so the probability of a fault is high; an important point is that after the above-mentioned busbar system determines the number of connected outgoing circuit breakers, when adding a loop or reducing or changing a loop, it is necessary to increase or reduce, change the order of the outgoing circuit breakers, and when distributing the circuit, it is necessary to remove or / and install the outgoing circuit breakers. Since the outgoing circuit breaker is connected to the outgoing end of the busbar through a wire, the operator is required to cut off the power to operate, which affects the operation of the entire distribution box; and it is also accompanied by cumbersome, multi-position wire removal and connection work.

[0004] Therefore, it is necessary to provide a busbar system that does not require wire connection and can be plug-and-play. Utility Model Content

[0005] The purpose of the utility model is to provide a plug-and-play busbar system for outgoing line circuit breakers in response to the above-mentioned problems, which can arbitrarily increase, reduce and change circuits without power outage, without the need for wire connection, thus achieving plug-and-play and avoiding tedious wire removal and connection work, thereby ensuring safety.

[0006] The technical scheme adopted by the utility model is as follows: a plug-and-play busbar system for an outgoing circuit breaker comprises an incoming circuit breaker, a test junction box, a busbar and an outgoing circuit breaker, wherein the test junction box is provided with a main busbar and two groups of branch busbars connected in parallel to the main busbar, the incoming circuit breaker is connected to the main busbar, and one or two groups of busbars are respectively connected to the branch busbars; the outgoing end of the busbar is provided with a plurality of connecting branches; the outgoing circuit breaker is plugged into the connecting branches; the connecting branches are covered with an insulating telescopic sleeve with deformation recovery capability, one end of the telescopic sleeve is fixed relative to the busbar; the length of the telescopic sleeve is not less than the length of the connecting branches.

[0007] Furthermore, it also includes a protective shell, and the busbar is located in the protective shell.

[0008] Furthermore, busbar slots are provided in the protective shell, and different busbar rows are located in different busbar slots.

[0009] Furthermore, the depth of the busbar slot is greater than the width of the busbar row.

[0010] Furthermore, the protective shell also has a protruding notch, the spatial position of the protruding notch is located above the busbar slot, and the connecting branch passes through the protruding notch and is plugged into the outgoing circuit breaker.

[0011] Furthermore, one end of the telescopic sleeve has an annular groove, which is engaged in the extending notch; or one end of the telescopic sleeve is directly fixedly connected to the outer wall of the protective shell.

[0012] Furthermore, it also includes a base, and the protective shell is assembled on the base.

[0013] Furthermore, a clamping rail is arranged on the base, and a clamping plate is provided at the bottom of the protective shell, and the outer side of the clamping rail is fitted with the inner side of the clamping plate.

[0014] Furthermore, it also includes an end seat for supporting the protective shell; the rail has a bending portion, and the bottom of the card plate and the bottom of the end seat both have hooks, and the hooks are located below the bending portion; the end of the end seat that is close to the protective shell has a supporting protrusion, and the supporting protrusion is supported on the inner wall of the protective shell in the vertical direction; a threaded through hole is opened on the end seat, and a screw threadedly connected to the threaded through hole is provided, and the hook is pressed against the base surface through the end of the screw to support the end seat and the lower surface of the bending portion.

[0015] Furthermore, a mutual inductor is installed on the main line busbar, the test junction box has a smart meter, and the mutual inductor is connected to the smart meter via electrical signals.

[0016] Furthermore, the test junction box has a shell, and the main line busbar and the branch line busbar are both arranged in the shell.

[0017] Furthermore, a cross-shaped partition member is provided on the bottom plate and outer surface of the shell.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0019] 1. The utility model divides the main busbar connected to the incoming circuit breaker into two groups of branch busbars through the test junction box. The user can adjust the number of busbars according to the applicable place and situation, and can supply power to two groups of busbars at the same time, so as to achieve the maximum number of busbars arranged in a small space;

[0020] 2. The utility model provides a connecting bar on the busbar, and connects the connecting bar with the outgoing circuit breaker to replace the wire to connect the outgoing circuit breaker with the busbar, so as to achieve plug-and-play and avoid the cumbersome wire removal and connection work;

[0021] 3. The utility model puts an insulating telescopic sleeve on the connecting branch, and the telescopic sleeve has the ability to elastically restore deformation. When the outgoing circuit breaker is detached from and inserted into the connecting branch, the telescopic sleeve always wraps the part of the connecting branch outside the outgoing circuit breaker, and after the outgoing circuit breaker is completely detached, the telescopic sleeve will completely wrap the connecting branch, thereby avoiding electric sparks due to the potential difference between adjacent connecting branches, and avoiding the risk of electric shock to operators, thereby realizing the arbitrary addition, reduction, and change of circuits without power outage, thereby ensuring the safety of the distribution box and operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a schematic diagram of the system structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the appearance structure of the utility model;

[0025] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of the protective shell disclosed in the utility model;

[0027] Figure 5 It is a structural schematic diagram of the telescopic sleeve disclosed in the utility model;

[0028] Figure 6 It is a schematic diagram of the support protrusions disclosed in the utility model distributed on the support baffle;

[0029] Figure 7 It is a structural schematic diagram of the housing disclosed in the utility model;

[0030] Markings in the figure: 1-incoming circuit breaker; 2-test junction box; 21-housing; 22-smart meter; 23-branch busbar; 24-partition; 25-transformer; 26-main busbar; 3-outgoing circuit breaker; 4-protective shell; 41-protruding gap; 42-busbar slot; 43-card plate; 44-hook; 5-end seat; 51-support baffle; 52-support protrusion; 6-base; 61-card rail; 611-bending part; 7-telescopic sleeve; 71-annular card slot; 8-busbar; 81-connecting support bar. DETAILED DESCRIPTION

[0031] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0032] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0033] Example 1

[0034] like Figure 1-Figure 7 As shown, a plug-and-play busbar system for an outgoing circuit breaker includes an incoming circuit breaker 1, a test junction box 2, a busbar 8 and an outgoing circuit breaker 3. The test junction box has a main busbar 26 and two sets of branch busbars 23 connected in parallel to the main busbar 26. The same phase line in the main busbar 26 and the branch busbar 23 are connected, and the shape is similar to a "Y" shape or a "U" shape; different phase lines are separated from each other; when the main busbar 26 is powered, the two branch busbars 23 are powered; the main busbar 26 is powered. 26 is powered off, and the two branch busbars 23 are powered off; the incoming circuit breaker is connected to the main busbar 26, and the incoming circuit breaker controls whether the main busbar 26 is energized; specifically, the incoming circuit breaker is closed, and the main busbar 26 is energized; the incoming circuit breaker is disconnected, and the main busbar 26 is powered off; the busbars are respectively connected to the branch busbars 23, that is, the incoming circuit breaker 1 controls whether the busbar 8 is energized, that is, the incoming circuit breaker 1 is closed, and the busbar 8 is energized; the incoming circuit breaker 1 is disconnected, and the busbar 8 is powered off.

[0035] It should be noted that one or two groups of busbars are connected to the test junction box; if the number of busbars is one group, then the group of busbars is connected to any one of the two branch busbars 23; if the number of busbars is two groups, then the two groups of busbars are respectively connected to the two branch busbars 23; the main line busbar 26 connected to the incoming circuit breaker is divided into two groups of branch busbars 23 through the test junction box. The user can adjust the number of busbars according to the applicable place and situation, and can supply power to two groups of busbars at the same time, so as to achieve the maximum number of busbars arranged in a small space.

[0036] In this embodiment, the number of phases of the busbar 8 is known to those skilled in the art, and it usually has 3 or 4 lines. If the busbar 8 has 3 lines, they are A-phase, B-phase, and C-phase line lines respectively; if the busbar 8 has 4 lines, it adds N-phase line lines on the basis of A-phase, B-phase, and C-phase; similarly, the line lines in the branch busbar 23 correspond to the number of line lines in the busbar 8; 1 line A-phase, B-phase, C-phase or / and N-phase line lines constitute a group of busbars 8; the outgoing end of the busbar 8 has a plurality of connecting branches 81, That is, each busbar in each group of busbars 8 is provided with a plurality of connecting branches 81 in the length direction, and each busbar in the busbar 8 is connected to a plurality of distribution circuits through its own connecting branches 81; the outgoing circuit breaker 3 is plugged into the connecting branches 81, and one or more outgoing circuit breakers 3 control whether the corresponding distribution circuit is energized; that is, specifically, the incoming circuit breaker 1 is closed, and the busbar 8 is energized; the outgoing circuit breaker 3 on the corresponding distribution circuit is closed, and the distribution circuit obtains power from the busbar 8 through the connecting branches 81.

[0037] Furthermore, if the number of busbars 8 is two groups, the connecting branches are arranged in a "N" shape to avoid position interference when plugging in the outgoing circuit breaker and to reasonably utilize the space.

[0038] In this embodiment, an insulating telescopic sleeve 7 is sleeved on the connecting branch 81, that is, the telescopic sleeve 7 can surround the connecting branch 81; one end of the telescopic sleeve 7 is fixed relative to the busbar 8, that is, one end of the telescopic sleeve 7 is a fixed end, which is fixed relative to the busbar 8 or the connecting branch 81, and the other end of the telescopic sleeve 7 is a movable end, which can move along the axial direction to realize the telescopic function of the telescopic sleeve 7; the telescopic sleeve 7 is an insulating sleeve with elastic deformation recovery ability, such as made of rubber material, which can be fully unfolded without being affected by external force, and its length is at a free length; the free length of the telescopic sleeve 7 is not less than the length of the connecting branch 81, so as to ensure that the telescopic sleeve 7 can completely wrap the connecting branch 81 when it is not squeezed by the outgoing circuit breaker 3.

[0039] In this embodiment, by providing a connecting branch 81 on the busbar 8, the connecting branch 81 is plugged into the outgoing circuit breaker 3, and the outgoing circuit breaker 3 is connected to the busbar 8 instead of the wire, so as to realize plug-and-play and avoid the tedious wire removal and connection work; by putting an insulating telescopic sleeve 7 on the connecting branch 81, the telescopic sleeve 7 has the ability of elastic recovery deformation, when the outgoing circuit breaker 3 is separated from and inserted into the connecting branch 81, the telescopic sleeve 7 always wraps the part of the connecting branch 81 located outside the outgoing circuit breaker 3, and after the outgoing circuit breaker 3 is completely separated, the telescopic sleeve 7 will completely wrap the connecting branch 81, thereby avoiding the electric sparks caused by the potential difference between the adjacent connecting branches 81, and also avoiding the risk of electric shock to the operator, thereby realizing the arbitrary increase, reduction, and change of the circuit without power outage, thereby ensuring the safety of the distribution box and the operator.

[0040] Example 2

[0041] Based on Example 1, a specific implementation method that can be implemented is further proposed.

[0042] A feasible implementation manner further includes a protective shell 4, in which the busbar 8 is located to protect the busbar 8, prevent dust from entering the phase lines of the busbar 8 to generate static electricity, and prevent the busbar 8 from being damaged from the outside.

[0043] A feasible implementation manner is that a busbar slot 42 is provided in the protective shell 4, and different busbars 8 are located in different busbar slots 42. The width of the busbar slot 42 matches the thickness of the busbar 8, so as to achieve the purpose of constraining the position of the busbar 8 and ensure its position stability, thereby avoiding contact between different phase lines in the same group of busbars 8 and avoiding short circuit.

[0044] In a feasible implementation manner, the depth of the busbar slot 42 is greater than the width of the busbar 8, so that the busbar 8 is completely located in the busbar slot 42, further preventing contact between different phase lines in the same group of busbars 8, and further preventing short circuits.

[0045] In a feasible implementation manner, the protective shell 4 also has an extension notch 41 for the connecting branch 81 to extend out. The connecting branch 81 is preferably "L"-shaped, one end of which is connected to the busbar 8 of the corresponding phase line, and the other end extends from the extension notch 41, that is, the spatial position of the extension notch 41 is located above the busbar slot 42, and one end of the "L"-shaped connecting branch 81 passes through the extension notch 41 and is plugged into the outgoing circuit breaker 3.

[0046] It should be noted that the connecting branches 81 on different phase lines in the same group of busbars 8 should be arranged alternately in space, that is, there should be intervals between adjacent connecting branches 81 to avoid short circuits caused by contact.

[0047] In this embodiment, a specific implementation method for fixing the telescopic sleeve 7 relative to the busbar 8 is further proposed.

[0048] In the first embodiment, one end of the telescopic sleeve 7 serving as the fixed end has an annular groove 71, which is engaged in the protruding notch 41, that is, the edge of the protruding notch 41 is located in the annular groove 71; under the constraints of the annular groove 71 and the connecting support bar 81, the position of the telescopic sleeve 7 can remain stable.

[0049] In a second embodiment, one end of the telescopic sleeve 7 serving as a fixed end is directly fixedly connected to the outer wall of the protective shell 4 .

[0050] Example 3

[0051] Based on any one of the implementations in Examples 1-2, a feasible specific implementation is further proposed.

[0052] A feasible implementation manner further includes a base 6, which serves as a mounting seat. On the one hand, the base 6 fixes the protective shell 4, and on the other hand, the busbar system is installed on the box body of the distribution box.

[0053] A feasible implementation manner is that a rail 61 is provided on the base 6, and a card plate 43 is provided at the bottom of the protective shell 4, and the outer side of the rail 61 is fitted with the inner side of the card plate 43; the rail 61 is adopted, on the one hand, to facilitate the installation of the protective shell 4, that is, the card plate 43 can be slid into the rail 61 on the base 6 to achieve installation; on the other hand, the lateral movement of the card plate 43 is limited by the rail 61, that is, the horizontal direction is perpendicular to the length direction of the rail 61, and the length direction of the rail 61 is parallel to the length direction of the bus slot 42 and the length direction of the bus bar 8, thereby avoiding lateral position displacement of the protective shell 4 during use.

[0054] A feasible implementation manner further includes an end seat 5 for supporting the protective shell 4, and the end seat 5 cooperates with the rail 61 on the base 6 to realize the longitudinal and vertical position of the protective shell 4; the longitudinal direction is the direction parallel to the length of the rail 61 in the horizontal direction, and the vertical direction is the vertical direction; specifically, the rail 61 has a bending portion 611, and the purpose of the bending portion 611 is to limit the protective shell 4 in the vertical direction, and the bottom of the clamping plate 43 and the bottom of the end seat 5 are both provided with a hook 44, and the hook 44 is located below the bending portion 611, and the hook 44 is hung on the bending portion 611 to realize the vertical constraint of the protective shell 4; the end of the end seat 5 close to the protective shell 4 is a supporting baffle 51, and the supporting baffle 51 has a supporting protrusion 52, and the supporting protrusion 52 is supported on the inner wall of the protective shell 4 in the vertical direction, and the supporting protrusion 52 supports the inner wall of the protective shell 4 in the vertical direction. The protective shell 4 is provided with a hook 44 on the protective shell 4 and is hooked with the bending portion 611; a threaded through hole is provided on the end seat 5, and a screw is threadedly connected to the threaded through hole, and the hook 44 is supported by the end of the screw against the surface of the base 6 to support the end seat 5 and the lower surface of the bending portion 611, and the end of the screw is against the surface of the base 6. The screw is continuously turned, and the end seat 5 moves vertically upward along the screw, and at the same time supports the protective shell 4 with the supporting protrusion 52, and the hook is restricted by the bending portion 611, so that the hook and the bending portion 611 are tightly attached to restrict the end seat 5 and the protective shell 4 from moving upward, and there is a large friction between the hook and the bending portion 611 to restrict the longitudinal movement of the end seat 5; that is, the protective shell 4 is restrained in the lateral, longitudinal and vertical directions to ensure the stable position of the protective shell 4, and further ensure the stable position of the busbar 8 in the protective shell 4.

[0055] Of course, in this embodiment, a threaded hole can also be provided on the base 6, and a screw can be passed through the threaded hole and connected to the threaded hole to lock the end seat 5, thereby locking the longitudinal position of the protective shell 4. However, in this method, the protective shell 4 cannot be completely constrained in the vertical direction; for this reason, the threaded hole can be a non-threaded countersunk hole to constrain the protective shell 4 in the horizontal, longitudinal and vertical directions, ensuring that the position of the protective shell 4 is stable.

[0056] Example 4

[0057] Based on any one of the implementations in Examples 1-3, a feasible specific implementation is further proposed.

[0058] The incoming circuit breaker 1 is connected to the incoming end of the busbar 8 through the test junction box 2, so that the incoming end of the busbar 8 is connected to the incoming circuit breaker 1. A mutual inductor 25 is installed on the main busbar 26. The test junction box has a smart meter 22. The mutual inductor 25 is electrically connected to the smart meter 22. The mutual inductor 25 can obtain the current data on the main busbar 26 and transmit the current data to the smart meter 22 for display. The smart meter 22 is known in the art and will not be described in detail here.

[0059] A feasible implementation manner, the test junction box has a shell 21, and the main busbar 26 and the branch busbar are both arranged in the shell 21; the shell 21 protects the main busbar 26 and the branch busbar to prevent them from being damaged by the outside world, and fixes the main busbar 26 and the line rows in the branch busbar; that is, there are card slots in the box body, and the line rows placed in the card slots are different, that is, the line rows are isolated by the card slots to prevent the line rows from moving and causing contact short circuits; the setting shape and distribution of the card slots are set according to the distribution of the line rows in the main busbar 26 and the branch busbar.

[0060] Furthermore, the bottom plate and outer surface of the shell 21 have a cross-shaped partition member 24, the bottom of the shell 21 is bolted to the distribution box, and other components are provided at the position of the distribution box that is engaged with the shell 21. The partition member 24 retreats into the inside of the shell 21, and the space formed between the shell 21 serves as an escape space for other components, and the partition member 24 is arranged in a cross shape, which is equivalent to a reinforcing plate, that is, it can maintain the basic strength of the shell 21.

[0061] Example 5

[0062] like Figure 1-Figure 7 As shown, a plug-and-play method for an outgoing circuit breaker is provided, and the plug-and-play busbar system of the outgoing circuit breaker 3 described in any one of the implementation modes of Examples 1-4 is applied, comprising the following steps:

[0063] S1: The plug-and-play busbar system of the outgoing circuit breaker 3 is installed in the distribution box, and the incoming circuit breaker 1 is connected to an external power supply, which can be the mains power or the upper-level distribution box to provide power for the distribution box; the outgoing circuit breaker 3 is connected to the corresponding distribution circuit, which can be a circuit with electrical equipment or a lower-level distribution cabinet.

[0064] S2: If it is necessary to remove an outgoing circuit breaker 3 in a distribution circuit, that is, when adding or reducing or changing the order of outgoing circuit breakers 3 or the distribution circuit, a certain outgoing circuit breaker 3 needs to be removed, an insulating tool is used to tighten the locking screw at the connection hole of the outgoing circuit breaker 3 (the locking screw is tightened to lock the connecting support bar 81 in the connecting hole, and its axis after installation is perpendicular to the connecting hole), the connecting support bar 81 is loosened, the outgoing circuit breaker 3 is pulled out, the connecting support bar 81 is separated from the connecting hole of the outgoing circuit breaker 3, and the telescopic sleeve 7 restores its deformation and wraps the connecting support bar 81.

[0065] S3: If it is necessary to install an outgoing circuit breaker 3 in a certain power distribution circuit, install the outgoing circuit breaker 3, insert the connecting branch 81 into the connecting hole of the outgoing circuit breaker 3, and use an insulating tool to tighten the locking screw to complete the connection between the connecting branch 81 and the outgoing circuit breaker 3, so as to realize the plug-and-play of the outgoing circuit breaker 3; at the same time, the outer end surface of the outgoing circuit breaker 3 pushes the telescopic sleeve 7, and the telescopic sleeve 7 is deformed and contracted and has elastic potential energy for restoring the deformation after the outgoing circuit breaker 3 is disassembled, so as to prepare for the telescopic sleeve 7 to wrap the connecting branch 81.

[0066] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A plug-and-play busbar system for outgoing circuit breakers, characterized in that: The invention comprises an incoming circuit breaker (1), a test junction box (2), a busbar (8) and an outgoing circuit breaker (3); the test junction box (2) comprises a main busbar (26) and two groups of branch busbars (23) connected in parallel to the main busbar (26); the incoming circuit breaker (1) is connected to the main busbar (26); one or two groups of busbars are respectively connected to the branch busbars (23); the outgoing end of the busbar (8) comprises a plurality of connecting branches (81); the outgoing circuit breaker (3) is plugged into the connecting branches (81); an insulating telescopic sleeve (7) having deformation recovery capability is sleeved on the connecting branches (81); one end of the telescopic sleeve (7) is fixed relative to the busbar (8); the length of the telescopic sleeve (7) is not less than the length of the connecting branches (81).

2. The busbar system according to claim 1, characterized in that: It also comprises a protective shell (4), wherein the busbar (8) is located in the protective shell (4); a busbar slot (42) is provided in the protective shell (4), and different busbars (8) are located in different busbar slots (42); the depth of the busbar slot (42) is greater than the width of the busbar (8).

3. The busbar system according to claim 2, characterized in that: The protective shell (4) also has a protruding notch (41), and the connecting branch (81) passes through the protruding notch (41) and is plugged into the outgoing circuit breaker (3).

4. The busbar system according to claim 3, characterized in that: One end of the telescopic sleeve (7) has an annular groove (71), and the annular groove (71) is engaged in the protruding notch (41); or one end of the telescopic sleeve (7) is directly fixedly connected to the outer wall of the protective shell (4).

5. The busbar system according to claim 4, characterized in that: It also comprises a base (6), on which a clamping rail (61) is arranged, and the bottom of the protective shell (4) has a clamping plate (43), and the outer side of the clamping rail (61) is in contact with the inner side of the clamping plate (43).

6. The busbar system according to claim 5, characterized in that: It also includes an end seat (5) for supporting the protective shell (4); the rail (61) has a bent portion (611), the bottom of the clamping plate (43) and the bottom of the end seat (5) both have hooks (44), and the hooks (44) are located below the bent portion (611); one end of the end seat (5) close to the protective shell (4) has a supporting protrusion (52), and the supporting protrusion (52) is supported on the inner wall of the protective shell (4) in the vertical direction; the end seat (5) is provided with a threaded through hole, and a screw is threadedly connected to the threaded through hole, and the hook (44) is supported by the end of the screw against the surface of the base (6) to support the end seat (5) and the lower surface of the bent portion (611) in close contact.

7. The busbar system according to any one of claims 1 to 6, characterized in that: A mutual inductor (25) is installed on the main line busbar (26), the test junction box has a smart meter (22), and the mutual inductor (25) is connected to the smart meter (22) via an electrical signal.

8. The busbar system according to any one of claims 1 to 6, characterized in that: The test junction box comprises a housing (21), and the main line busbar (26) and the branch line busbar are both arranged in the housing (21).

9. The busbar system according to claim 8, characterized in that: The bottom plate and outer surface of the housing (21) are provided with a cross-shaped partition member (24).

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