Connecting structure of wire outlet end of molded case circuit breaker and low-voltage switch cabinet

Abstract

The utility model relates to the technical field of electrical equipment, in particular to a connecting structure of a wire outlet end of a molded case circuit breaker and a low-voltage switch cabinet, and the connecting structure comprises an insulating fixed beam, a plurality of molded case circuit breaker bodies, a plurality of connecting bars and a plurality of line banks, every two adjacent connecting bars are arranged on the two sides of the insulating fixed beam. The line bank independently positioned on one side of the insulating fixed beam is centrally connected with the connecting bar; the two connector bars located on the same side of the insulation fixing beam are connected with the corresponding connecting bars in a side-by-side mode, and the connecting portion of one connector bar and the connecting bar is located on the side, close to the other connector bar, of the center shaft of the connector bar. According to the utility model, the structural strength of the outgoing line ends of the same row of molded case circuit breaker bodies is improved, the situation that the molded case circuit breaker bodies are damaged due to external factors is reduced, and the problems that the outgoing line ends of molded case circuit breakers arranged in rows are not connected, the molded case circuit breakers are easy to damage, and the service life is prolonged are solved. And thus, the circuit cannot be effectively controlled and protected.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a connection structure for the outgoing terminals of a molded case circuit breaker and a low-voltage switch cabinet. Background Technology

[0002] With the rapid development of new energy equipment, the market demand for low-voltage switchgear, as a key component of power distribution systems, is also growing steadily.

[0003] In low-voltage switchgear, circuit protection is typically achieved by installing circuit breakers in each branch circuit. The switchgear is generally divided into multiple circuit zones, each with several circuit breakers to control and protect specific circuits. These circuit breakers are usually arranged in rows to maintain neatness and order within the cabinet. Molded case circuit breakers (MCCBs), as a type of circuit breaker, typically use insulators to fix their outgoing lines. However, the outgoing lines of MCCBs in the same row are not interconnected and do not form a unified structure. This results in lower structural strength at the outgoing lines, making them susceptible to damage from vibration, impact, or other external factors. This damage affects the normal operation of the MCCBs, ultimately preventing them from effectively controlling and protecting the circuit. Furthermore, if the cables in some circuit areas of the low-voltage switchgear are not clamped tightly by the cable clamps, and the cables become loose or fall off, they may become entangled on these insulators. Due to the weight of the cables themselves, a certain amount of tension is exerted on the insulators, causing damage to these insulators and molded case circuit breakers. This not only affects the normal operation of the low-voltage switchgear circuits but also causes power failures, shortens the service life of the low-voltage switchgear, and may even increase the risk of power accidents. Utility Model Content

[0004] The main purpose of this utility model is to provide a connection structure for the output terminals of molded case circuit breakers, which improves the structural strength of the output terminals of the same row of molded case circuit breakers, reduces the damage to the molded case circuit breaker body due to external factors, and solves the technical problem that the output terminals of molded case circuit breakers arranged in rows are not connected, the structural strength of the output terminals is low, and the molded case circuit breakers are easily damaged when affected by external factors, thus making it impossible to effectively control and protect the circuit.

[0005] Another objective of this utility model is to provide a low-voltage switchgear using the connection structure of the above-mentioned molded case circuit breaker output terminals. This improves the structural strength of the output terminals of the same row of molded case circuit breakers, prevents cables from loosening or falling off, and avoids affecting the normal operation of the low-voltage switchgear circuit. It also makes the output terminals of the molded case circuit breakers arranged in rows compact, solving the technical problems of no connection between the output terminals of molded case circuit breakers arranged in rows, low structural strength of the output terminals, easy damage to molded case circuit breakers when affected by external factors, and damage to insulators and molded case circuit breakers if the cables inside the cabinet become loose or fall off, affecting the normal operation of the low-voltage switchgear circuit, shortening the service life of the low-voltage switchgear, and increasing the risk of power accidents.

[0006] To achieve the above objectives, the connection structure of the molded case circuit breaker output terminal proposed in this utility model is applied to low-voltage switchgear, including an insulating fixing beam, several molded case circuit breaker bodies, several connection bars and several terminal blocks;

[0007] Several of the molded case circuit breaker bodies are arranged in a row along the direction parallel to the length of the insulating fixing beam, and each of the molded case circuit breaker bodies has three outgoing terminals at its bottom.

[0008] One end of each of the connecting bars is connected to a corresponding outgoing terminal, and the other end is connected to the insulating fixing beam. Two adjacent connecting bars are arranged on both sides of the insulating fixing beam. The end of each connecting bar connected to the insulating fixing beam is also connected to the terminal block.

[0009] In the same molded case circuit breaker body, the terminal block located on one side of the insulating fixing beam is centrally connected to the connecting block; the two terminal blocks located on the same side of the insulating fixing beam are respectively connected to the corresponding connecting blocks near the side, and the connection part of one of the terminal blocks and the connecting block is located on the side of its own central axis closer to the other terminal block.

[0010] Optionally, in the same molded case circuit breaker body, the terminal block located on one side of the insulating fixing beam is provided with a centrally located first through hole, and the two terminal blocks located on the same side of the insulating fixing beam are respectively provided with a first offset hole and a second offset hole;

[0011] The connecting row is provided with a second through hole, and the insulating fixing beam is provided with a countersunk through hole. The head of the first bolt is embedded in the countersunk through hole. The bolt of the first bolt passes through the countersunk through hole, the second through hole, and one of the first offset hole, the second offset hole, and the first through hole in sequence before being connected to the first nut.

[0012] Optionally, the insulating fixing beam is disposed behind several of the molded case circuit breaker bodies, and the connecting bar and the terminal block both extend downward along the height direction of the molded case circuit breaker body.

[0013] Optionally, the number of first through holes, the number of first offset holes, and the number of second offset holes in a terminal block are all the same as the number of second through holes in a connector.

[0014] Optionally, the connecting plate includes a first connecting plate, a second connecting plate, and a third connecting plate. The first connecting plate and the third connecting plate are parallel and both extend downward along the height direction of the molded case circuit breaker body. The two ends of the second connecting plate are respectively connected to the first connecting plate and the third connecting plate, and the second connecting plate extends along the width direction of the molded case circuit breaker body. The end of the first connecting plate away from the second connecting plate is connected to the outgoing terminal, and the end of the third connecting plate away from the second connecting plate is connected to the insulating fixing beam.

[0015] Optionally, the end faces of the second connecting plates connected to the third connecting plates located on the same side of the insulating fixing beam are flush.

[0016] Optionally, a spacer and a partition are provided between adjacent outgoing terminals of the same molded case circuit breaker body. The spacer is connected to the bottom end of the molded case circuit breaker body. A slot is provided at one end of the spacer away from the molded case circuit breaker body. One end of the partition is engaged with the slot. The other end of the partition extends downward along the height direction of the molded case circuit breaker body.

[0017] This utility model also proposes a low-voltage switch cabinet, including the connection structure of the output terminal of any of the above-mentioned molded case circuit breakers and the cabinet body.

[0018] Optionally, the low-voltage switchgear further includes several mounting angle plates, which are disposed on the inner side wall of the cabinet. The two ends of the insulating fixing beam along its length are respectively connected to two oppositely disposed mounting angle plates to fix the insulating fixing beam inside the cabinet.

[0019] Optionally, the mounting corner plate is in the shape of a right triangle, with one right-angled side of the mounting corner plate connected to the inner side wall of the cabinet, and the other right-angled side of the mounting corner plate connected to the bottom end of the insulating fixing beam.

[0020] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0021] 1. In this utility model, one end of each connecting bar is connected to a corresponding outgoing terminal, and the other end is connected to an insulating fixing beam. By setting the insulating fixing beam, all connecting bars of the molded case circuit breaker bodies arranged in a row are fixed together, thus connecting the outgoing terminals of the molded case circuit breaker bodies in the same row to form an integral structure. This improves the structural strength of the outgoing terminals of the molded case circuit breaker bodies in the same row, reduces the possibility of damage to these molded case circuit breakers due to external factors, and makes the outgoing terminals of these molded case circuit breakers more compact, improving space utilization. This allows for the connection of more molded case circuit breakers, increasing the number of outgoing lines and making it highly practical. Adjacent connecting bars are arranged on both sides of the insulating fixing beam, ensuring that all connecting bars of the molded case circuit breaker bodies arranged in a row are staggered, guaranteeing that electrical distances meet the requirements for air gaps and creepage distances.

[0022] 2. Within the same molded case circuit breaker body, the terminal block located on one side of the insulating fixed beam is centrally connected to the connecting block, while the two terminal blocks on the same side of the insulating fixed beam are respectively connected to the corresponding connecting blocks near the edge. This ensures that the creepage distance requirements between the two terminal blocks on different sides of the insulating fixed beam are met. Furthermore, when the two terminal blocks on the same side of the insulating fixed beam are connected to the corresponding connecting blocks, these two terminal blocks are offset to both sides of the insulating fixed beam, increasing the air gap between them. Therefore, the air gap requirements between the two terminal blocks on the same side of the insulating fixed beam are also met. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the connection structure of the output terminal of a molded case circuit breaker according to an embodiment of the present invention.

[0024] Figure 2 This is a front view of the connection structure of the output terminal of a molded case circuit breaker according to an embodiment of the present invention (with one terminal block hidden);

[0025] Figure 3 This is a rear view of the connection structure of the output terminal of a molded case circuit breaker according to an embodiment of the present invention.

[0026] Figure 4 This is a side view of the connection structure of the output terminal of a molded case circuit breaker according to an embodiment of the present invention.

[0027] Figure 5 This is a bottom view of the connection structure of the output terminal of a molded case circuit breaker according to an embodiment of the present invention.

[0028] Figure 6 This is a partial schematic diagram of a low-voltage switchgear according to an embodiment of the present invention.

[0029] The components include: 1. Insulating fixing beam; 11. Countersunk through hole; 12. Third through hole; 2. Molded case circuit breaker body; 21. Outgoing terminal; 22. Spacer bar; 221. Slot; 23. Partition plate; 3. Connecting strip; 31. Second through hole; 32. First connecting plate; 33. Second connecting plate; 34. Third connecting plate; 4. Terminal block; 41. First through hole; 42. First offset hole; 43. Second offset hole; 5. Cabinet; 6. Mounting corner plate. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, in this utility model, descriptions involving "first," "second," etc., are 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. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments 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 impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] This utility model proposes a connection structure for the output terminal of a molded case circuit breaker.

[0035] In the embodiments of this utility model, such as Figure 1 and 5 As shown, the connection structure of the outgoing terminal of the molded case circuit breaker is applied to a low-voltage switchgear, including an insulating fixing beam 1, several molded case circuit breaker bodies 2, several connecting blocks 3 and several terminal blocks 4.

[0036] Several molded case circuit breaker bodies 2 are arranged in a row along the length direction of the parallel insulating fixed beam 1, and each molded case circuit breaker body 2 has three outgoing terminals 21 at its bottom.

[0037] One end of each connecting row 3 is connected to a corresponding outgoing terminal 21, and the other end is connected to the insulating fixing beam 1. Two adjacent connecting rows 3 are arranged on both sides of the insulating fixing beam 1. The end of the connecting row 3 connected to the insulating fixing beam 1 is also connected to the terminal block 4.

[0038] In the same molded case circuit breaker body 2, the terminal block 4 located on one side of the insulating fixing beam 1 is centrally connected to the connecting block 3; the two terminal blocks 4 located on the same side of the insulating fixing beam 1 are respectively connected to the corresponding connecting blocks 3 on the side, and the connection part of one of the terminal blocks 4 and the connecting block 3 is located on the side of its own central axis close to the other terminal block 4.

[0039] In this invention, one end of each connecting row 3 is connected to a corresponding outgoing terminal 21, and the other end is connected to an insulating fixing beam 1. By setting the insulating fixing beam 1, all the connecting rows 3 of the molded case circuit breaker bodies 2 are fixed together, thus connecting the outgoing terminals 21 of the molded case circuit breaker bodies 2 in the same row to form an integral structure. This improves the structural strength of the outgoing terminals 21 of the molded case circuit breaker bodies 2 in the same row, reduces the possibility of damage to these molded case circuit breakers due to external factors, and makes the outgoing terminals of these molded case circuit breakers more compact, improving space utilization. This allows for the connection of more molded case circuit breakers, increasing the number of outgoing lines and making it highly practical. Adjacent connecting rows 3 are arranged on both sides of the insulating fixing beam 1, so that all the connecting rows 3 of the molded case circuit breaker bodies 2 in the row are staggered, ensuring that the electrical distance meets the requirements for air gap and creepage distance. In the same molded case circuit breaker body 2, the terminal block 4 located on one side of the insulating fixing beam 1 is centrally connected to the connecting block 3. The two terminal blocks 4 located on the same side of the insulating fixing beam 1 are respectively connected to the corresponding connecting blocks 3 near the edge. This ensures that the creepage distance requirement between the two terminal blocks 4 located on different sides of the insulating fixing beam 1 is met. Moreover, when the two terminal blocks 4 located on the same side of the insulating fixing beam 1 are connected to the corresponding connecting blocks 3, these two terminal blocks 4 are offset to both sides of the insulating fixing beam 1, increasing the air gap between them. Therefore, the air gap requirement between the two terminal blocks 4 located on the same side of the insulating fixing beam 1 is also met. This solves the technical problem that the outgoing terminals of molded case circuit breakers arranged in rows are not interconnected, the structural strength of the outgoing terminals is low, and the molded case circuit breakers are easily damaged when affected by external factors, thus failing to effectively control and protect the circuit.

[0040] In another embodiment of this utility model, the insulating fixing beam 1, the connecting strip 3 and the terminal strip 4 can be connected by using conductive adhesive, welding or threaded fasteners such as bolts and nuts.

[0041] To further clarify, the molded case circuit breaker is a 3P three-phase circuit breaker.

[0042] To further clarify, in the same molded case circuit breaker body 2, the creepage distance between two terminal blocks 4 located on different sides of the insulating fixing beam 1 refers to the shortest path between these two terminal blocks 4 measured along the insulating surface. In the same molded case circuit breaker body 2, the air gap between two terminal blocks 4 located on the same side of the insulating fixing beam 1 refers to the shortest straight-line distance between the two edge lines of these two terminal blocks 4.

[0043] like Figure 2 and 3As shown, in one embodiment of this application, in the same molded case circuit breaker body 2, the terminal block 4 located on one side of the insulating fixing beam 1 is provided with a centrally located first through hole 41, and the two terminal blocks 4 located on the same side of the insulating fixing beam 1 are respectively provided with a first offset hole 42 and a second offset hole 43.

[0044] The connecting row 3 is provided with a second through hole 31, and the insulating fixing beam 1 is provided with a countersunk through hole 11. The head of the first bolt is embedded in the countersunk through hole 11. The bolt of the first bolt passes through the countersunk through hole 11, the second through hole 31, and one of the first offset hole 42, the second offset hole 43, and the first through hole 41 in sequence before being connected to the first nut.

[0045] One of the first through hole 41, the first offset hole 42, and the second offset hole 43 is connected to the second through hole 31 and the countersunk through hole 11 by the first bolt and the first nut. This means that the insulating fixing beam 1, the connecting strip 3, and the terminal block 4 are tightly connected together by the first bolt and the first nut. Even under the influence of external factors, the insulating fixing beam 1, the connecting strip 3, and the terminal block 4 will not loosen or shift, thereby improving the overall structural strength of this connection structure. By providing the countersunk through hole 11, the head of the first bolt is embedded in the countersunk through hole 11, which meets the creepage distance requirements. Furthermore, the head of the first bolt being embedded in the countersunk through hole 11 maintains the flatness and aesthetics of the surface of the insulating fixing beam 1. Specifically, the number of countersunk through holes 11 is the same as the number of all outgoing terminals 21 of all molded case circuit breaker bodies 2.

[0046] Preferably, the first bolt is a hexagonal bolt.

[0047] To further explain, the insulating fixing beam 1, the connecting strip 3 and the terminal block 4 are fixed by the first bolt and the first nut. Since the connecting strip 3 and the terminal block 4 are energized, the first bolt and the first nut are also energized. At this time, the creepage distance is designed according to the insulation distance between the head of the first bolt and the head of the other bolt.

[0048] like Figure 4 As shown, in one embodiment of this application, the insulating fixing beam 1 is disposed behind several molded case circuit breaker bodies 2, and the connecting bar 3 and the terminal bar 4 are both disposed downward along the height direction of the molded case circuit breaker body 2.

[0049] The insulating fixing beam 1 is set behind several molded case circuit breaker bodies 2, and the connecting row 3 and the terminal block 4 are both set downward along the height direction of the molded case circuit breaker body 2. This allows the outgoing terminals 21 of these rows of molded case circuit breaker bodies 2 to be arranged more compactly. When this utility model is applied to a low-voltage switchgear, multiple rows of molded case circuit breaker bodies 2 are set in the low-voltage switchgear, and the insulating fixing beam 1 is set behind these molded case circuit breaker bodies 2. This not only makes the internal space of the low-voltage switchgear more compact and efficient, improving the space utilization rate, but also helps to improve the aesthetics of the entire low-voltage switchgear.

[0050] Preferably, the insulating fixing beam 1 is made of SMC. Using SMC as the material for the insulating fixing beam 1 gives it high strength, thus giving this invention high structural strength.

[0051] like Figure 2 and 3 As shown, in one embodiment of this application, the number of first through holes 41, the number of first offset holes 42, and the number of second offset holes 43 of a terminal block 4 are all the same as the number of second through holes 31 of a connecting block 3.

[0052] The number of the first through hole 41, the first offset hole 42, and the second offset hole 43 of a terminal block 4 are all the same as the number of the second through hole 31 of a connecting block 3. In this way, the connection between each connecting block 3, each terminal block 4 and the insulating fixing beam 1 can be made using the same number of first bolts and first nuts, thereby ensuring the connection stability and reliability of the outgoing terminal 21 of each molded case circuit breaker body 2.

[0053] like Figures 1 to 4 As shown, in one embodiment of this application, the connecting plate 3 includes a first connecting plate 32, a second connecting plate 33, and a third connecting plate 34. The first connecting plate 32 and the third connecting plate 34 are parallel and both extend downward along the height direction of the molded case circuit breaker body 2. The two ends of the second connecting plate 33 are connected to the first connecting plate 32 and the third connecting plate 34, respectively, and the second connecting plate 33 extends along the width direction of the molded case circuit breaker body 2. The end of the first connecting plate 32 away from the second connecting plate 33 is connected to the outgoing terminal 21, and the end of the third connecting plate 34 away from the second connecting plate 33 is connected to the insulating fixing beam 1.

[0054] The connecting plate 3 includes a first connecting plate 32, a second connecting plate 33, and a third connecting plate 34, which can better realize the connection between the outgoing terminal 21 of the molded case circuit breaker body 2 and the insulating fixing beam 1. The first connecting plate 32 and the third connecting plate 34 are parallel, and the two ends of the second connecting plate 33 are respectively connected to the first connecting plate 32 and the third connecting plate 34. In this way, the structure of the connecting plate 3 is compact and reasonable, which can ensure the stable connection between the outgoing terminal 21 of the molded case circuit breaker body 2 and the insulating fixing beam 1.

[0055] To elaborate further, both connector 3 and terminal block 4 are copper busbars.

[0056] To further explain, the lengths of several third connecting plates 34 located on one side of the insulating fixed beam 1 are all greater than the lengths of several third connecting plates 34 located on the other side of the insulating fixed beam 1.

[0057] like Figures 1 to 3 As shown, in one embodiment of this application, the end faces of several second connecting plates 33 connected to several third connecting plates 34 located on the same side of the insulating fixing beam 1 are flush.

[0058] The end faces of the several third connecting plates 34 connected to the several second connecting plates 33 on the same side of the insulating fixed beam 1 are flush, which makes the connection structure a compact and orderly structure. This not only meets the connection requirements between the first connecting plate 32 and the third connecting plate 34, and thus realizes the connection between the connecting row 3 and the insulating fixed beam 1, but also improves the aesthetics of the overall structure.

[0059] Preferably, a connecting row 3 is provided with two second through holes 31.

[0060] like Figure 1 , 4 As shown in Figure 5, in one embodiment of this application, a spacer 22 and a partition 23 are provided between adjacent outgoing terminals 21 of the same molded case circuit breaker body 2. The spacer 22 is connected to the bottom end of the molded case circuit breaker body 2. A slot 221 is provided at one end of the spacer 22 away from the molded case circuit breaker body 2. One end of the partition 23 is engaged with the slot 221. The other end of the partition 23 extends downward along the height direction of the molded case circuit breaker body 2.

[0061] A spacer 22 and a partition 23 are provided between adjacent outgoing terminals 21 of the same molded case circuit breaker body 2. The spacer 22 and the partition 23 isolate adjacent outgoing terminals 21, protecting each outgoing terminal 21 of the same molded case circuit breaker body 2, thus improving the electrical safety of this invention. In addition, when operators perform maintenance and repair, the spacer 22 and the partition 23 act as an insulating barrier to protect the safety of the operators and reduce the occurrence of safety accidents.

[0062] This utility model also proposes a low-voltage switchgear, such as Figure 6 As shown, the low-voltage switchgear includes the connection structure of the outgoing terminals of the molded case circuit breaker and the cabinet 5.

[0063] By using the connection structure of the molded case circuit breaker's outgoing terminals, all the connecting rows 3 of the molded case circuit breaker bodies 2 arranged in a row are fixed together, connecting the outgoing terminals 21 of all the molded case circuit breaker bodies 2 in the same row to form a unified structure. This improves the structural strength of the outgoing terminals 21 of the molded case circuit breaker bodies 2 in the same row, preventing cables from loosening or falling off and affecting the normal operation of the low-voltage switchgear circuit. Furthermore, this connection structure of the molded case circuit breaker's outgoing terminals allows for a compact arrangement of the outgoing terminals of the molded case circuit breakers arranged in a row, enabling the connection of more molded case circuit breakers and increasing the number of outgoing lines. This reduces the overall footprint of the low-voltage switchgear, making it more practical and suitable for larger capacity 20HC prefabricated substations. This invention addresses the technical problems of molded case circuit breakers (MCCBs) installed in rows without connection between their outgoing terminals, resulting in low structural strength at the outgoing terminals. These MCCBs are prone to damage when exposed to external factors, and if cables in the low-voltage switchgear become loose or detached, it can damage insulators and MCCBs, affecting the normal operation of the low-voltage switchgear circuit, shortening its service life, and increasing the risk of power accidents.

[0064] like Figure 6 As shown, in one embodiment of this application, the low-voltage switchgear further includes a plurality of mounting angle plates 6, which are disposed on the inner sidewall of the cabinet 5. The two ends of the insulating fixing beam 1 in the length direction are respectively connected to two oppositely disposed mounting angle plates 6 to fix the insulating fixing beam 1 inside the cabinet 5.

[0065] This low-voltage switchgear uses several mounting angle plates 6 on the inner side wall of the cabinet 5 to connect the two ends of the insulating fixing beam 1 along its length to two oppositely arranged mounting angle plates 6. The mounting angle plates 6 provide stable support for the insulating fixing beam 1, ultimately enabling the insulating fixing beam 1 to be installed inside the cabinet 5.

[0066] In one embodiment of this utility model, a plurality of molded case circuit breaker bodies 2 are arranged along the width direction of the low-voltage switchgear, and an insulating fixing beam 1 extends along the width direction of the low-voltage switchgear.

[0067] In another embodiment of this utility model, a connecting frame is provided inside the low-voltage switchgear, and the two ends of the insulating fixing beam 1 are respectively connected to the connecting frame. In this way, the insulating fixing beam 1 can be installed inside the cabinet 5. When multiple rows of molded case circuit breaker bodies 2 need to be installed inside the low-voltage switchgear, multiple insulating fixing beams 1 can be installed using the connecting frame.

[0068] like Figure 6As shown, in one embodiment of this application, the mounting angle plate 6 is a right-angled triangle, one right-angled side of the mounting angle plate 6 is connected to the inner side wall of the cabinet 5, and the other right-angled side of the mounting angle plate 6 is connected to the bottom end of the insulating fixing beam 1.

[0069] The mounting angle plate 6 is a right-angled triangle, which gives it unique structural stability. The mounting angle plate 6 has a high load-bearing capacity, which can provide better support and stability for the insulating fixing beam 1. In addition, the right-angled triangle mounting angle plate 6 can be accurately and quickly installed on the inner wall of the low-voltage switchgear, thus facilitating the rapid installation of the insulating fixing beam 1.

[0070] To further explain, the insulating fixing beam 1 has a third through hole 12 at both ends along its length direction, and the mounting angle plate 6 also has a corresponding third through hole 12. The insulating fixing beam 1 and the mounting angle plate 6 are fixedly connected by a second bolt and a second nut. One end of the second bolt passes through the third through hole 12 of the insulating fixing beam 1 and the third through hole 12 of the mounting angle plate 6 and is then connected to the second nut.

[0071] Preferably, the mounting angle plate 6 is also connected to the inner wall of the low-voltage switchgear via a second bolt and a second nut. Preferably, the second bolt is a hexagonal bolt.

[0072] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A connection structure of an outgoing terminal of a molded case circuit breaker, applied to a low-voltage switchgear, characterized in that, The application relates to an insulation fixed beam, a plurality of MCCB bodies, a plurality of connecting rows and a plurality of wiring rows. The plurality of MCCB bodies are arranged in rows along the length direction of the insulation fixed beam, and the bottom end of each MCCB body is provided with three outgoing lines. One end of each connecting row is connected with one corresponding outgoing line, the other end is connected with the insulation fixed beam, and two adjacent connecting rows are arranged on the two sides of the insulation fixed beam. In the same MCCB body, the wiring row alone on one side of the insulation fixed beam is connected with the connecting row in the middle, and the two wiring rows on the same side of the insulation fixed beam are connected with the corresponding connecting rows on the side.

2. The connection structure of the molded case circuit breaker outlet terminal according to claim 1, characterized in that, In the same MCCB body, the wiring row alone on one side of the insulation fixed beam is provided with a first through hole arranged in the middle, and the two wiring rows on the same side of the insulation fixed beam are respectively provided with a first eccentric hole and a second eccentric hole. The connecting row is provided with a second through hole, the insulation fixed beam is provided with a countersunk through hole, the head of a first bolt is embedded in the countersunk through hole, the screw rod of the first bolt passes through the countersunk through hole, the second through hole and one of the first eccentric hole, the second eccentric hole and the first through hole in sequence, and is connected with a first nut.

3. The connection structure of the molded case circuit breaker outlet terminal according to claim 2, characterized in that, The insulation fixed beam is arranged behind the plurality of MCCB bodies, and the connecting row and the wiring row are arranged downwards along the height direction of the MCCB body.

4. The connection structure of the outlet terminal of the molded case circuit breaker according to claim 3, characterized in that, The number of the first through holes of one wiring row, the number of the first eccentric holes of one wiring row, the number of the second eccentric holes of one wiring row and the number of the second through holes of one connecting row are the same.

5. The connection structure of the outlet terminal of the molded case circuit breaker according to claim 1, characterized in that, The connecting row comprises a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate is parallel to the third connecting plate, the first connecting plate and the third connecting plate are arranged downwards along the height direction of the MCCB body, the two ends of the second connecting plate are connected with the first connecting plate and the third connecting plate respectively, the second connecting plate is arranged along the width direction of the MCCB body, one end of the first connecting plate away from the second connecting plate is connected with the outgoing line, and one end of the third connecting plate away from the second connecting plate is connected with the insulation fixed beam.

6. The connection structure of the outlet terminal of the molded case circuit breaker according to claim 5, characterized in that, The end faces of the plurality of second connecting plates connected with the plurality of third connecting plates on the same side of the insulation fixed beam are flush.

7. The connection structure of the outlet terminal of the molded case circuit breaker according to claim 6, characterized in that, Adjacent outgoing lines of the same MCCB body are provided with a partition strip and a partition plate, one end of the partition plate is connected with the bottom end of the MCCB body, one end of the partition strip away from the MCCB body is provided with a clamping groove, one end of the partition plate is clamped with the clamping groove, and the other end of the partition plate is arranged downwards along the height direction of the MCCB body.

8. A low voltage switchgear, characterized in that The application relates to a connecting structure of a molded case circuit breaker outlet terminal and a cabinet body.

9. Low voltage switchgear according to claim 8, characterized in that The low-voltage switch cabinet further comprises a plurality of mounting angle plates, the plurality of mounting angle plates are arranged on the inner side wall of the cabinet body, and the two ends of the length direction of the insulation fixing beam are connected with two oppositely arranged mounting angle plates respectively, so that the insulation fixing beam is fixed in the cabinet body.

10. Low voltage switchgear according to claim 9, characterized in that The mounting angle plate is a right triangle, one right side of the mounting angle plate is connected with the inner side wall of the cabinet body, and the other right side of the mounting angle plate is connected with the bottom end of the insulation fixing beam.

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