General connection method of low-voltage busbar

Abstract

The application relates to a general connecting method of low-voltage bus lines, a terminal box composed of a main box and a side box is used for connecting the low-voltage bus lines, and the main box and the side box are connected in two ways to be suitable for connecting the cable and / or the wire of the low-voltage bus lines; the main box and the side box are connected in parallel to form a character ''I'' shape, so that the low-voltage bus lines are extended to achieve the purpose of extending the connection; the main box and the side box are connected in parallel to form an ''L'' shape, so that the low-voltage bus lines are turned and extended to achieve the purpose of corner connection. The general connecting method of the low-voltage bus lines is simple and convenient to install, and is high in universality and safety.

Description

Technical Field

[0001] This invention relates to the field of power distribution technology, and in particular to a general connection method for low-voltage busbars. Background Technology

[0002] A transformer, also known as a power transformer, is located at one end of the three major structures of power generation, transmission, and transformation. One side steps up the generated electricity for long-distance transmission, while the other side steps down the high-voltage electricity for user consumption. In other words, the transformer, despite being a sophisticated electrical device, plays a crucial role in the power industry.

[0003] The two sides of a transformer are the high-voltage side and the low-voltage side. For a step-up transformer, the low-voltage side is connected to the generator set, and the high-voltage side is connected to the transmission line. For a step-down transformer, the high-voltage side is connected to the transmission line, and the low-voltage side is connected to the electrical equipment. Whether it's a step-up or step-down transformer, the low-voltage side needs to be connected in the corresponding distribution room or electrical equipment room. The conventional connection methods are: busbars, cables, and flexible busbar connections. However, conventional connection methods still have the following shortcomings:

[0004] 1. Using busbars requires on-site fabrication based on actual conditions, resulting in a long construction period;

[0005] 2. Using cables results in a large bending radius, and the construction of cable joints is complex and time-consuming;

[0006] 3. The exposed flexible busbar connection poses a safety hazard. Summary of the Invention

[0007] To address the technical problems existing in the background art, the present invention provides a universal connection method for low-voltage busbars, which is simple and convenient to install, and has high versatility and safety.

[0008] The technical solution adopted by this invention is:

[0009] The general connection method for low-voltage busbars uses a junction box consisting of a main box and a side box to connect the low-voltage busbars. It is applicable to the general connection of low-voltage busbars through both main box and side box connection methods.

[0010] The connection method is applicable to the connection of cables and / or cable strips, including:

[0011] A. Extend the wiring:

[0012] The main box and the side box are connected side by side in a straight line to extend the low-voltage busbar.

[0013] B. Corner wiring:

[0014] The main box and the side box are connected side by side in an "L" shape, so that the low-voltage busbar can be turned and extended.

[0015] Furthermore, the main box includes:

[0016] The main box is a rectangular box body with openings on the top and sides. A wire inlet groove is provided through the symmetrical side wall of the side opening of the main box body. A first slot is symmetrically provided on the side wall of the side opening of the main box body. A second slot is symmetrically provided on the side wall of the top opening of the main box body near the side opening. A first latch, a first baffle, and a first locking plate are provided inside the main box body away from the side opening.

[0017] The first ear is symmetrically arranged inside the long side wall of the main box body and close to the side of the cable outlet groove. The first baffle and the first locking plate are arranged at the inner bottom below the first ear. Multiple sets of the first locking plates are arranged parallel to the long side of the main box body to lock the bolts. The first baffle is arranged perpendicular to the first locking plate.

[0018] Furthermore, the side box includes:

[0019] The side box is a cube-shaped box with openings on the top and sides. The side box is half of the main box. A wire through groove is provided through the symmetrical side wall of the side opening of the side box. A plug ear is symmetrically provided on the side wall of the side opening of the side box. The plug ear matches the first slot and the second slot. The inside of the side box is provided with a second latch, a second baffle and a second locking plate.

[0020] The second ear is symmetrically arranged inside the side wall of the side box.

[0021] The second clamping plate is arranged in multiple sets parallel to the extension direction of the lug for clamping the bolt, and the second baffle is arranged perpendicular to the second clamping plate.

[0022] Furthermore, a pressing mechanism is fixedly installed inside the main box body and the side box body, the pressing mechanism comprising:

[0023] Pressure plates are respectively locked in the first and second locking ears. Bolts are passed through the pressure plates and are respectively locked in the first baffle, the first locking plate, the second baffle, and the second locking plate, and are screwed with nuts.

[0024] The pressure plate includes:

[0025] The plate has through holes for bolts at its four corners and a first set of recessed wire pressing holes. The first set of wire pressing holes is a set of multiple coaxial semi-circular recessed holes, and the diameter of the holes gradually increases along the direction from the side opening of the main box to the wire inlet groove.

[0026] Furthermore, a connecting mechanism is press-fitted onto the pressure plate, the connecting mechanism comprising:

[0027] The connecting plates are respectively pressed against the pressure plates inside the main box body and the side box body. The connecting plates are recessed and have a second pressure hole group that is symmetrical to the first pressure hole group. The four corners of the connecting plates are provided with through holes for bolts. A connecting flexible plate is provided between the two connecting plates that are pressed against the pressure plates inside the main box body and the side box body. The second pressure hole group is set as multiple sets of coaxial semi-circular concave holes, and the diameter of the holes gradually increases along the direction from the side opening of the side box body to the wire exit groove.

[0028] Furthermore, the opening of the junction box is sealed with an outer cover, and the outer cover has mounting holes through which fixing screws are inserted; the outer cover consists of a first cover and a second cover, the first cover being square and the second cover being a rectangle twice the size of the first cover.

[0029] The main box body has a first set of mounting screw holes on the side wall of the opening at the top and side; the side box body has a second set of mounting screw holes on the side wall of the opening at the top; and fixing screws are screwed into the first set of mounting screw holes and the second set of mounting screw holes.

[0030] Furthermore, step A, extending the wiring, includes:

[0031] Insert the earpiece into the first slot so that the side opening of the main box body is connected to the side opening of the side box body;

[0032] Insert the bolt into the through hole and screw the nut in;

[0033] Inside the main box: Place the pressure plate in and rotate the bolts so that the bolts are engaged in the first baffle and the first clip plate. Press down the pressure plate and engage it in the first clip ear.

[0034] Inside the side box: Place the pressure plate in and rotate the bolt to make the bolt engage with the second baffle and the second clip plate. Press down the pressure plate and make it engage with the second clip.

[0035] Unscrew the nuts and store them properly. Then, through the holes, fit the connecting plates at both ends of the connecting mechanism onto the bolts inside the main box and the side box, and screw the stored nuts onto the bolts.

[0036] Tighten the nuts threaded onto the bolts and press the cables and / or cable trays passing through the inlet and outlet cable trays;

[0037] The first cover is fixed to the opening of the main box near the cable inlet slot using the fixing screws, and the second cover is fixed to the side openings of the main box and the side box.

[0038] Furthermore, step B, the corner wiring, includes:

[0039] Insert the ear into the second slot so that the side opening of the main box is parallel to the side opening of the side box;

[0040] Inside the main box: Insert the bolt into the through hole and screw the nut in. Place the pressure plate in and rotate the bolt to make it snap into the first baffle and the first clamping plate. Press down the pressure plate and make it snap into the first clamping ear. Unscrew the nut and put it away. Slide the connecting plate at one end of the connecting mechanism onto the bolt inside the main box through the through hole. Screw the nut into the bolt.

[0041] Inside the side box: Insert the bolt into the through hole and screw on the nut. Place the connecting plate at the other end of the connecting mechanism into the box and rotate the bolt to make it snap into the second baffle and the second clip. Press down the connecting plate and make it snap into the second clip. Unscrew the nut and put it away. Put the pressure plate through the through hole onto the bolt inside the side box and screw the nut you have put away onto the bolt.

[0042] Tighten the nuts threaded onto the bolts and press the cables and / or cable trays passing through the inlet and outlet cable trays;

[0043] The first cover is fixed to the opening of the main box near the cable inlet slot using the fixing screws, and the second cover is fixed to the side openings of the main box and the side box.

[0044] The first cover is fixed to the opening of the main box body near the cable inlet slot using fixing screws, and the second cover is fixed to the opening of the main box body and the side box body away from the cable inlet slot.

[0045] The advantages of the universal connection method for low-voltage busbars of the present invention are as follows:

[0046] 1. Encapsulating connecting components through main boxes and side boxes improves safety;

[0047] 2. By using the connection method of the main box and the side box to correspond to the actual line direction on site, the versatility is improved;

[0048] 3. The busbar is pressed tightly by the plate and connecting plate; the cable is pressed tightly by the first pressure hole group on the plate and the second pressure hole group on the connecting plate. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings required for the specific embodiments will be briefly introduced below. The accompanying drawings in the following description are embodiments of the present invention.

[0050] Figure 1 This is a general perspective view of the universal connection device for low-voltage busbars provided in this invention. Figure 1 ;

[0051] Figure 2 This is a three-dimensional exploded view of the universal connection device for low-voltage busbars provided in this invention.

[0052] Figure 3 This is a side view of the main box of the universal connection device for low-voltage busbars provided in this embodiment of the invention;

[0053] Figure 4 This is a side view of the side box of the universal connection device for low-voltage busbars provided in this embodiment of the invention;

[0054] Figure 5 This is an exploded perspective view of the main box of the universal connection device for low-voltage busbars provided in this invention embodiment;

[0055] Figure 6 This is a three-dimensional exploded view of the side box of the universal connection device for low-voltage busbars provided in this invention embodiment;

[0056] Figure 7 This is a three-dimensional schematic diagram of the pressure plate of the universal connection device for low-voltage busbars provided in this invention.

[0057] Figure 8 This is a three-dimensional schematic diagram of the pressure plate and connection mechanism of the universal connection device for low-voltage busbars provided in this invention.

[0058] Figure 9 This is a general perspective view of the universal connection device for low-voltage busbars provided in this invention. Figure 2 ;

[0059] Figure 10 This is a three-dimensional schematic diagram of the connection mechanism of the universal connection device for low-voltage busbars provided in this invention.

[0060] In the picture:

[0061] 1. Junction box

[0062] 11. Main box; 110. Main box body; 111. Cable entry slot; 112. First mounting screw hole group; 113. First slot.

[0063] 114. Second slot; 115. First latch; 116. First baffle; 117. First locking plate.

[0064] 12. Side box; 120. Side box body; 121. Cable exit groove; 122. Second mounting screw hole assembly; 123. Connector.

[0065] 125. Second latch, 126. Second baffle, 127. Second latch plate

[0066] 2. Outer protective cover,

[0067] 21. First protective cover, 22. First protective cover,

[0068] 3. Fix the screws.

[0069] 4. Crimping mechanism,

[0070] 41. Pressure plate; 42. Bolt; 43. Nut.

[0071] 410. Plate body; 411. Through hole; 412. First pressure hole group.

[0072] 5. Connecting mechanism,

[0073] 50. Connecting plate; 51. Second pressure hole group; 52. Through hole; 53. Connecting flexible plate. Detailed Implementation

[0074] To more clearly and explicitly illustrate the specific objectives and implementation methods of this invention, a complete description of the technical solution of this invention will be provided below. The described embodiments are only a part of the embodiments of this invention, not all of them. Without creative effort, all other embodiments based on the embodiments described in this invention are within the protection scope of this invention.

[0075] The universal connection device for low-voltage busbars of the present invention, such as Figure 1 , Figure 2 As shown, it includes:

[0076] An open junction box 1, the opening of which is sealed with an outer protective cover 2, the junction box 1 consists of a main box 11 and a side box 12.

[0077] The main box 11, as Figure 3 , Figure 5 As shown, it includes:

[0078] The main box body 110 is open at the top and sides. The main box body 110 is a cuboid twice the size of the side box body 120. A wire inlet groove 111 is provided through the symmetrical sidewalls of the side openings of the main box body 110. A first mounting screw hole group 112 is provided on the sidewalls of the top and side openings of the main box body 110, and a fixing screw 3 is screwed into the first mounting screw hole group 112. First slots 113 are symmetrically arranged on the sidewalls of the side openings of the main box body 110. Symmetrically arranged slots 113 are also provided on the sidewalls of the top opening of the main box body 110 near the side opening. There is a second slot 114. Inside the main box body 110, which is away from the side opening, there are a first latch 115, a first baffle 116, and a first latch 117. The first latch 115 is symmetrically arranged inside the long side wall of the main box body 110 and close to the side of the cable outlet groove 121. The first baffle 116 and the first latch 117 are located at the inner bottom below the first latch 115. Multiple sets of the first latch 117 are arranged parallel to the long side of the main box body 110 to hold the bolt 42. The first baffle 116 is arranged perpendicular to the first latch 117.

[0079] The side box 12, as Figure 4 , Figure 6 As shown, it includes:

[0080] The side box 120 is open at the top and sides. The side box 120 is a cube. A wire through groove 121 is provided through the symmetrical side wall of the side opening of the side box 120. A second mounting screw hole group 122 is provided on the side wall of the opening at the top of the side box 120. A fixing screw 3 is screwed into the second mounting screw hole group 122. A plug ear 123 is symmetrically provided on the side wall of the side opening of the side box 120. The plug ear 123 matches the first slot 113 and the second slot 114. A second latch 125, a second baffle 126, and a second latch 127 are provided inside the side box 120. The second latch 125 is symmetrically arranged inside the side wall of the side box 120. Multiple sets of the second latch 127 are arranged parallel to the extension direction of the plug ear 123 for locking the bolt 42. The second baffle 126 is set perpendicular to the second latch 127.

[0081] The outer cover 2 has a through mounting hole for a fixing screw 3, such as... Figure 1 , Figure 2 As shown, the outer cover 2 is composed of a first cover 21 and a second cover 22. The first cover 21 is set as a square, and the second cover 22 is set as a rectangle twice the size of the first cover 21.

[0082] A pressing mechanism 4 is fixedly installed inside the main box body 110 and the side box body 120. The pressing mechanism 4, such as... Figure 5 , Figure 6 As shown, it includes:

[0083] Pressure plates 41 are respectively locked in the first latch 115 and the second latch 125. Bolts 42 are passed through the pressure plates 41. The bolts 42 are respectively locked in the first baffle 116, the first locking plate 117 and the second baffle 126 and the second locking plate 127, and are screwed with nuts 43.

[0084] The pressure plate 41, as Figure 7 As shown, it includes:

[0085] The plate body 410 has through holes 411 for bolts 42 at its four corners. The plate body 410 has a first set of recessed wire pressing holes 412. The first set of wire pressing holes 412 is a set of multiple sets of coaxial semi-circular recessed holes, and the diameter of the holes gradually increases along the direction from the side opening of the main box body 110 to the wire inlet groove 111.

[0086] A connecting mechanism 5 is crimped onto the pressure plate 41, wherein the connecting mechanism 5, as shown in the figure, is a connecting mechanism 5. Figure 8 , Figure 10 As shown, it includes:

[0087] A connecting plate 50 is respectively pressed against the pressure plate 41 inside the main box body 110 and the side box body 120. The connecting plate 50 is provided with a second pressure hole group 51 that is symmetrical to the first pressure hole group 412. The second pressure hole group 51 is set as multiple sets of coaxial semi-circular concave holes, and the hole diameter gradually increases along the direction from the side opening of the side box body 120 to the wire outlet groove 121. Through holes 52 for bolts 42 are provided at the four corners of the connecting plate 50. A connecting flexible plate 53 is provided between the two connecting plates 50 that are respectively pressed against the pressure plate 41 inside the main box body 110 and the side box body 120.

[0088] Based on the specific structure of the universal connection device for low-voltage busbars in the above embodiments, the universal connection method for low-voltage busbars will be further explained below:

[0089] A. Extend the wiring, such as Figure 1 As shown, it includes:

[0090] Insert the earpiece 123 into the first slot 113 so that the side opening of the main box 110 is connected to the side opening of the side box 120, that is, the main box 11 and the side box 12 are connected side by side in a "I" shape, so as to extend the low voltage bus.

[0091] Insert the bolt 42 into the through hole 411 and screw the nut 43 in;

[0092] Inside the main box 110: Place the pressure plate 41 in and rotate the bolt 42 so that the bolt 42 is engaged in the first baffle 116 and the first clip plate 117. Press down the pressure plate 41 and engage it in the first clip ear 115.

[0093] Inside the side box 120: Place the pressure plate 41 in and rotate the bolt 42 so that the bolt 42 is engaged in the second baffle 126 and the second clip plate 127. Press down the pressure plate 41 and engage it in the second clip 125.

[0094] Unscrew the nut 43 and store it. Then, put the connecting plates 50 at both ends of the connecting mechanism 5 onto the bolts 42 inside the main box body 110 and the side box body 120 through the through holes 52 respectively. Screw the stored nut 43 onto the bolts 42.

[0095] Tighten the nut 43 screwed onto the bolt 42 and press the cable and / or cable strip passing through the inlet slot 111 and outlet slot 121;

[0096] The first cover 21 is fixed to the opening of the main box body 110 near the cable inlet slot 111 by fixing screw 3, and the second cover 22 is fixed to the side openings of the main box body 110 and the side box body 120.

[0097] B. Corner wiring, such as Figure 9 As shown, it includes:

[0098] Insert the earpiece 123 into the second slot 114 so that the side opening of the main box 110 is parallel to the side opening of the side box 120, that is, the main box 11 and the side box 12 are connected side by side in an "L" shape, so that the low voltage busbar turns and extends.

[0099] Inside the main box body 110: Insert the bolt 42 into the through hole 411 and screw the nut 43 in. Place the pressure plate 41 in and rotate the bolt 42 so that the bolt 42 is engaged in the first baffle 116 and the first clamping plate 117. Press down the pressure plate 41 and engage it in the first clamping ear 115. Unscrew the nut 43 and store it. Slide the connecting plate 50 at one end of the connecting mechanism 5 onto the bolt 42 inside the main box body 110 through the through hole 52. Screw the stored nut 43 onto the bolt 42.

[0100] Inside the side box 120: Insert the bolt 42 into the through hole 52 and screw the nut 43 in. Place the connecting plate 50 at the other end of the connecting mechanism 5 in, and rotate the bolt 42 so that the bolt 42 is inserted into the second baffle 126 and the second clamping plate 127. Press down the connecting plate 50 and insert it into the second clamping ear 125. Unscrew the nut 43 and put it away. Put the pressure plate 41 through the through hole 411 onto the bolt 42 inside the side box 120, and screw the nut 43 into the bolt 42.

[0101] Tighten the nut 43 screwed onto the bolt 42 and press the cable or cable strip passing through the inlet slot 111 and outlet slot 121.

[0102] By fixing screw 3, the first cover 21 is fixed to the opening of the main box body 110 near the cable inlet slot 111, and the second cover 22 is fixed to the side openings of the main box body 110 and the side box body 120.

[0103] By fixing screw 3, the first cover 21 is fixed to the opening of the main box body 110 on the side near the inlet cable slot 111, and the second cover 22 is fixed to the opening of the main box body 110 and the side box body 120 on the side away from the inlet cable slot 111.

[0104] Based on the above, and guided by the embodiments of the universal connection method for low-voltage busbars of the present invention, those skilled in the art can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A universal connection method for low-voltage busbars, characterized in that: The junction box (1), consisting of a main box (11) and a side box (12), is used to connect the low-voltage busbar. The two connection methods, the main box (11) and the side box (12), are suitable for the general connection of the low-voltage busbar. The main box (11) includes: The main box (110) is a rectangular box body (110) with openings on the top and sides. A wire inlet groove (111) is provided through the symmetrical side wall of the side opening of the main box (110). A first slot (113) is symmetrically provided on the side wall of the side opening of the main box (110). A second slot (114) is symmetrically provided on the side wall of the top opening of the main box (110) near the side opening. A first latch (115), a first baffle (116), and a first latch (117) are provided inside the main box (110) away from the side opening. The side box (12) includes: A cube-shaped side box (120) with openings on the top and sides is provided. The side box (120) is set as half of the main box (110). A wire through groove (121) is provided through the symmetrical side wall of the side opening of the side box (120). A plug ear (123) is symmetrically provided on the side wall of the side opening of the side box (120). The plug ear (123) matches the first slot (113) and the second slot (114). The side box (120) is provided with a second latch (125), a second baffle (126) and a second latch (127) inside. The connection method is applicable to the connection of cables and / or cable strips, including: extension wiring or corner wiring; A. Extend the wiring: Insert the ear (123) into the first slot (113) so that the side opening of the main box body (110) is connected to the side opening of the side box body (120); the main box (11) and the side box (12) are connected side by side in a "I" shape so that the low voltage busbar can be extended. B. Corner wiring: Insert the ear (123) into the second slot (114) so ​​that the side opening of the main box body (110) is parallel to the side opening of the side box body (120); the main box (11) and the side box (12) are connected side by side to form an "L" shape, so that the low voltage busbar turns and extends.

2. The universal connection method for low-voltage busbars according to claim 1, characterized in that: The first ear (115) is symmetrically arranged inside the long side wall of the main box body (110) and close to the side of the cable through groove (121). The first baffle (116) and the first clamping plate (117) are arranged at the inner bottom below the first ear (115). Multiple sets of the first clamping plate (117) are arranged parallel to the long side of the main box body (110) to clamp the bolt (42). The first baffle (116) is arranged perpendicular to the first clamping plate (117).

3. The universal connection method for low-voltage busbars according to claim 2, characterized in that: The second ear (125) is symmetrically arranged inside the side wall of the side box body (120); The second clamping plate (127) is arranged in multiple sets parallel to the extension direction of the lug (123) to clamp the bolt (42), and the second baffle (126) is arranged perpendicular to the second clamping plate (127).

4. The universal connection method for low-voltage busbars according to claim 3, characterized in that: A pressing mechanism (4) is fixedly installed inside the main box body (110) and the side box body (120). The pressing mechanism (4) includes: A pressure plate (41) is respectively installed in the first ear (115) and the second ear (125). A bolt (42) is installed on the pressure plate (41). The bolt (42) is respectively installed in the first baffle (116), the first clamping plate (117) and the second baffle (126) and the second clamping plate (127), and a nut (43) is screwed on it. The pressure plate (41) includes: The plate (410) has through holes (411) for bolts (42) at its four corners, and a first set of recessed pressure holes (412) is provided on the plate (410). The first pressure hole group (412) is configured as multiple sets of coaxial semi-circular concave holes, and the hole diameter gradually increases along the direction from the side opening of the main box body (110) to the wire inlet groove (111).

5. The universal connection method for low-voltage busbars according to claim 4, characterized in that: A connecting mechanism (5) is press-fitted onto the pressure plate (41), the connecting mechanism (5) comprising: A connecting plate (50) is pressed against the pressure plate (41) inside the main box body (110) and the side box body (120) respectively. The connecting plate (50) is provided with a second pressure hole group (51) that is symmetrical to the first pressure hole group (412). Through holes (52) for bolts (42) are provided at the four corners of the connecting plate (50). A connecting flexible plate (53) is provided between the two connecting plates (50) that are pressed against the pressure plate (41) inside the main box body (110) and the side box body (120) respectively. The second pressure hole group (51) is configured as multiple sets of coaxial semi-circular concave holes, and the hole diameter gradually increases along the direction from the side opening of the side box body (120) to the wire through groove (121).

6. The universal connection method for low-voltage busbars according to claim 5, characterized in that: The junction box (1) is closed by an outer cover (2), and the outer cover (2) has a mounting hole through which a fixing screw (3) is inserted; the outer cover (2) is composed of a first cover (21) and a second cover (22), the first cover (21) is set as a square, and the second cover (22) is set as a rectangle twice the size of the first cover (21); The main box body (110) has a first set of mounting screw holes (112) on the side wall of the opening at the top and side; the side box body (120) has a second set of mounting screw holes (122) on the side wall of the opening at the top; and fixing screws (3) are screwed into the first set of mounting screw holes (112) and the second set of mounting screw holes (122).

7. The universal connection method for low-voltage busbars according to claim 6, characterized in that: Step A, extending the wiring, includes: Insert the ear (123) into the first slot (113) so that the side opening of the main box body (110) is connected to the side opening of the side box body (120); Insert the bolt (42) into the through hole (411) and screw the nut (43) in. Inside the main box body (110): Place the pressure plate (41) in and rotate the bolt (42) so that the bolt (42) is inserted into the first baffle (116) and the first clip plate (117). Press down the pressure plate (41) and insert it into the first clip (115). Inside the side box (120): Place the pressure plate (41) in and rotate the bolt (42) so that the bolt (42) is inserted into the second baffle (126) and the second clip (127). Press down the pressure plate (41) and insert it into the second clip (125). Unscrew the nut (43) and store it. Put the connecting plates (50) at both ends of the connecting mechanism (5) into the bolts (42) inside the main box body (110) and the side box body (120) through the through holes (52) respectively. Screw the stored nut (43) onto the bolt (42). Tighten the nut (43) screwed onto the bolt (42) and press the cable and / or cable strip passing through the inlet slot (111) and outlet slot (121); By fixing screws (3), the first cover (21) is fixed to the opening of the main box body (110) near the inlet cable slot (111), and the second cover (22) is fixed to the side openings of the main box body (110) and the side box body (120).

8. The universal connection method for low-voltage busbars according to claim 6, characterized in that: Step B, corner wiring, includes: Insert the ear (123) into the second slot (114) so ​​that the side opening of the main box body (110) is parallel to the side opening of the side box body (120); Inside the main box body (110): Insert the bolt (42) into the through hole (411) and screw the nut (43). Place the pressure plate (41) in and rotate the bolt (42) so that the bolt (42) is inserted into the first baffle (116) and the first clamping plate (117). Press down the pressure plate (41) and insert it into the first clamping ear (115). Unscrew the nut (43) and put it away. Put the connecting plate (50) at one end of the connecting mechanism (5) onto the bolt (42) inside the main box body (110) through the through hole (52). Screw the nut (43) into the bolt (42). Inside the side box (120): Insert the bolt (42) into the through hole (52) and screw the nut (43). Place the connecting plate (50) at the other end of the connecting mechanism (5) and rotate the bolt (42) so that the bolt (42) is inserted into the second baffle (126) and the second clamping plate (127). Press down the connecting plate (50) and insert it into the second clamping ear (125). Unscrew the nut (43) and put it away. Put the pressure plate (41) through the through hole (411) onto the bolt (42) inside the side box (120) and screw the nut (43) into the bolt (42). Tighten the nut (43) screwed onto the bolt (42) and press the cable and / or cable strip passing through the inlet slot (111) and outlet slot (121); By fixing screws (3), the first cover (21) is fixed to the opening of the main box body (110) on the side near the inlet cable slot (111), and the second cover (22) is fixed to the opening of the main box body (110) and the side box body (120) on the side away from the inlet cable slot (111).

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