High-protection-grade heavy-current switch cabinet

Abstract

The utility model relates to a high-protection-grade heavy-current switch cabinet, and belongs to the field of electrical cabinets. In the switch cabinet, a cabinet body frame is composed of metal stand columns, cross beams and partition plates, and the partition plates divide the space in the cabinet into a bus cavity, a control cavity and a PE / N bus cavity; the bus system comprises a horizontal bus and a branch bus bar, and the horizontal bus is fixed at the top of the bus cavity through a T-shaped bolt and is vertically connected with the branch bus bar through a square reversing structure; the control bus system is integrated with a four-phase bus, is embedded into the insulating bracket of the control cavity, and is electrically connected with the branch bus bar through a copper bar; the PE bus system and the N bus system are respectively made of polyhedral aluminum alloy sections, are fixed on two sides of the PE / N bus cavity through clamping grooves, and are in grounding connection with the cabinet body frame; the modularized bus clamp is detachably installed on the cross beam of the cabinet body frame and is used for supporting the horizontal bus and the branch bus bar. Compared with a traditional low-voltage switch cabinet, the switch cabinet is high in overall safety and good in reliability.

Description

Technical Field

[0001] This utility model belongs to the field of electrical cabinets and relates to a high-current switch cabinet with a high protection level. Background Technology

[0002] In power systems, low-voltage switchgear, as a key device for power distribution and control, is widely used in industrial, commercial, and residential sectors. However, traditional low-voltage switchgear generally suffers from low protection levels in its design and application, which is particularly prominent in harsh environments. For example, in humid, dusty, corrosive, or explosive environments, traditional low-voltage switchgear is susceptible to damage to its internal electrical components due to external environmental factors, which can affect the stable operation of the entire power system and even potentially lead to safety accidents.

[0003] Specifically, the low protection level of traditional low-voltage switchgear is mainly reflected in the following aspects:

[0004] Unreasonable structural design: Traditional low-voltage switchgear cabinets often have a simple cabinet structure and lack effective partitioning design, resulting in electrical components with different functions (such as busbar system, control busbar system, PE busbar system and N busbar system) being mixed together, which not only increases the difficulty of maintenance, but also reduces the overall safety and reliability.

[0005] The busbar system connection is complex: the connection between the horizontal busbar and the branch busbar in traditional low-voltage switchgear usually adopts the traditional bolt or welding method. This method is not only complex to connect, but also has many specifications, making it difficult to adapt to the needs of different current levels and installation environments. At the same time, it has poor dynamic and thermal stability and is prone to loosening or overheating under long-term operation or high current impact.

[0006] Inconvenient PE / N busbar system fixing and wiring: Traditional low-voltage switchgear typically uses simple cables or copper busbars for fixing the PE and N busbars, which is unstable and inconvenient for wiring, making it difficult to meet the needs of multi-directional wiring. In addition, this fixing method also increases the grounding resistance and reduces the reliability of the grounding system.

[0007] Low wiring efficiency of control busbar systems: Traditional low-voltage switchgear control busbar systems often adopt a distributed design, with a large number of buses and complex wiring, which not only increases the risk of wiring errors but also reduces wiring efficiency. Furthermore, due to the lack of effective dynamic and thermal stability design, control buses are prone to loosening or overheating during long-term operation.

[0008] Unstable busbar clamp support: Traditional low-voltage switchgear busbar clamps typically use an integrated design, making it difficult to adapt to the support requirements of busbars of different specifications. Furthermore, the lack of a detachable structure makes the installation and maintenance of busbar clamps quite difficult.

[0009] Insufficient protection level: Traditional low-voltage switchgear often uses an unsealed design for its cabinet frame and partitions, making it difficult to effectively prevent the intrusion of external environmental factors (such as dust, moisture, corrosive gases, etc.). This not only reduces the overall protection level of the switchgear but also increases the risk of damage to electrical components. Utility Model Content

[0010] In view of this, the purpose of this utility model is to provide a high-current switchgear with a high protection level. By optimizing the cabinet frame structure, busbar system connection method, PE / N busbar system fixing and wiring method, control busbar system wiring method, busbar clamp support method, and improving the sealing of the cabinet frame and partition plate, this invention effectively solves the problems existing in traditional low-voltage switchgear when used in harsh environments, and improves the overall safety and reliability of the switchgear.

[0011] To achieve the above objectives, this utility model provides the following technical solution: a high-protection-level high-current switchgear, comprising a cabinet frame, a busbar system, a control busbar system, a PE busbar system, and an N busbar system; the cabinet frame is composed of metal columns, beams, and partitions, the partitions dividing the cabinet interior into a busbar cavity, a control cavity, and a PE / N busbar cavity; the busbar system includes horizontal busbars and branch busbars, the horizontal busbars being fixed to the top of the busbar cavity by T-bolts and vertically connected to the branch busbars via a square reversing structure; the control busbar system integrates four-phase busbars and is embedded in the insulating bracket of the control cavity, electrically connected to the branch busbars via copper busbars; the PE busbar system and the N busbar system respectively adopt multi-faceted aluminum alloy profiles, fixed to both sides of the PE / N busbar cavity via slots, and grounded connected to the cabinet frame; modular busbar clamps are detachably installed on the cabinet frame beams to support the horizontal busbars and branch busbars.

[0012] Optionally, the aluminum alloy profiles of the horizontal busbars are connected by T-bolts, reducing the number of connection specifications and improving dynamic and thermal stability.

[0013] Optionally, the multi-faceted aluminum alloy profile design of the PE busbar system and N busbar system includes multiple fixing surfaces, supporting simultaneous multi-directional wiring.

[0014] Optionally, the four-phase busbar integrated design of the control busbar system is fixed by an integrated structure, which improves wiring efficiency and dynamic and thermal stability.

[0015] Optionally, the square commutation structure of the branch busbar includes a 90° bent copper busbar for adapting the fixing of the current transformer and the commutation connection of the copper busbar.

[0016] Optionally, the modular busbar clamp is installed on the cabinet frame via a detachable structure to support the horizontal busbar, branch busbar, and control busbar.

[0017] Optionally, the partition plate is sealed to the cabinet frame to achieve physical isolation between the chambers.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1) Improved protection level: Through the design of cabinet frame, partition plate and sealed connection, physical isolation is achieved between busbar cavity, control cavity and PE / N busbar cavity, effectively preventing the intrusion of external environmental factors (such as dust, moisture, corrosive gas, etc.) and significantly improving the overall protection level of switch cabinet.

[0020] 2) Optimized busbar system connections: The horizontal busbars are connected using aluminum alloy profiles and T-bolts, which is not only convenient and quick but also reduces the number of connection specifications and improves dynamic and thermal stability. This design makes the busbar system more compact and reliable, adapting to the needs of different current levels and installation environments.

[0021] 3) Convenient PE / N busbar system fixing and wiring: The PE and N busbars adopt a multi-faceted aluminum alloy profile design and are fixed to both sides of the PE / N busbar cavity via slots. This not only ensures a stable fixation but also supports simultaneous multi-directional wiring. This design greatly simplifies the installation and maintenance process of the PE / N busbar and improves work efficiency.

[0022] 4) Improved wiring efficiency of the control busbar system: The control busbar system integrates four-phase busbars and is embedded in the insulating bracket of the control cavity, fixed by an integrated structure, which improves wiring efficiency and dynamic and thermal stability. This design reduces the number of control busbars and wiring complexity, reduces the risk of wiring errors, and improves system reliability.

[0023] 5) Facilitates branch busbar connection and current transformer mounting: The branch busbar features a square commutation structure, including 90° bent copper busbars, for adapting to the mounting of current transformers and the reversing connection of copper busbars. This design makes the connection of the branch busbars more flexible and convenient, while meeting the installation requirements of current transformers and improving the overall performance of the system.

[0024] 6) Modular busbar clamps facilitate support and maintenance: The busbar clamps adopt a modular design and are installed on the cabinet frame beams via a detachable structure to support horizontal busbars, branch busbars, and control busbars. This design not only facilitates the installation and maintenance of the busbar clamps but also adapts to the support requirements of busbars of different specifications, improving the flexibility and scalability of the switchgear.

[0025] 7) Enhanced System Safety and Reliability: Through the above-mentioned optimized designs, this switchgear not only improves the protection level but also significantly enhances the system's safety and reliability. The isolation and fixation between electrical components are more robust, reducing the risk of failures caused by external environmental factors or loose internal connections, thus ensuring the stable operation of the power system.

[0026] 8) Reduced maintenance costs: Due to its more rational, compact, and easy-to-maintain design, this switchgear significantly reduces maintenance costs in practical applications. Maintenance personnel can more easily perform daily inspections and repairs, reducing economic losses caused by downtime due to malfunctions.

[0027] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0029] Figure 1 This is a perspective view of the entire utility model;

[0030] Figure 2 This is a schematic diagram of the horizontal busbar of this utility model;

[0031] Figure 3 This is a schematic diagram of the branch busbar installation of this utility model;

[0032] Figure 4 This is a schematic diagram of the busbar system installation of this utility model;

[0033] Figure 5 This is a schematic diagram of the busbar clamp of this utility model;

[0034] Figure 6 This is a schematic diagram of the PE busbar system of this utility model;

[0035] Figure 7 This is a schematic diagram of the N busbar system of this utility model;

[0036] Figure 8 This is a schematic diagram of the control bus system of this utility model.

[0037] Attached reference numerals: 1. Cabinet frame; 2. Busbar system; 21. Horizontal busbar; 22. Branch busbar; 23. Busbar clamp; 3. Control busbar system; 4. PE busbar system; 5. N busbar system. Detailed Implementation

[0038] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0040] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0041] Please see Figures 1 to 8 This is a high-protection-level, high-current switchgear, with an overall structure as follows: Figure 1 As shown, the cabinet includes a cabinet frame 1, a busbar system 2, a control busbar system 3, a PE busbar system 4, and an N busbar system 5. The cabinet frame 1 consists of metal columns, beams, and partitions. The partitions divide the internal space of the cabinet into busbar compartments, control compartments, and PE / N busbar compartments, achieving physical isolation between the compartments and effectively improving the protection level of the switchgear.

[0042] Example 1,

[0043] Busbar system: such as Figures 2-4As shown, busbar system 2 includes a horizontal busbar 21 and branch busbars 22. The horizontal busbar 21 is made of aluminum alloy profile and is fixed to the top of the busbar cavity with T-bolts, which not only makes the connection convenient and quick, but also reduces the number of connection specifications and improves dynamic and thermal stability. The branch busbar 22 is designed with a square commutation structure, including 90° bent copper busbars, for adapting to the fixing of current transformers and the reversing connection of copper busbars, making the connection of the branch busbars more flexible and convenient.

[0044] Control bus system: such as Figure 8 As shown, the control bus system 3 integrates four-phase busbars and is embedded in the insulating bracket of the control cavity, fixed by an integrated structure, which improves wiring efficiency and dynamic and thermal stability. This design reduces the number of control busbars and wiring complexity, lowers the risk of wiring errors, and improves system reliability. The control bus system 3 is electrically connected to the branch busbars 22 via copper busbars, realizing the distribution and control of electrical energy.

[0045] The control busbar system is located at the top of the cabinet, in front of the busbar compartment, near the door panel.

[0046] PE busbar system and N busbar system: such as Figure 6 and Figure 7 As shown, the PE busbar system 4 and N busbar system 5 each adopt multi-faceted aluminum alloy profiles, which are fixed to both sides of the PE / N busbar cavity through slots and grounded to the cabinet frame 1. The multi-faceted aluminum alloy profile design includes multiple fixing surfaces, supporting simultaneous multi-directional wiring, which greatly simplifies the installation and maintenance process of the PE / N busbar and improves work efficiency.

[0047] The PE busbar system is located at the bottom rear of the cabinet; the N busbar system is located at the bottom rear of the cabinet, directly above the PE busbar.

[0048] Busbar clamp: such as Figure 5 As shown, the busbar clamp adopts a modular design and is installed on the crossbeam of the cabinet frame 1 via a detachable structure to support the horizontal busbar 21, branch busbar 22, and control busbar system 3. This design not only facilitates the installation and maintenance of the busbar clamp but also adapts to the support requirements of different busbar specifications, improving the flexibility and scalability of the switchgear.

[0049] Example 2,

[0050] Sealed connection: The partition plate and the cabinet frame 1 adopt a sealed connection design, which realizes the physical isolation between the busbar cavity, control cavity and PE / N busbar cavity, effectively preventing the intrusion of external environmental factors (such as dust, moisture, corrosive gases, etc.) and significantly improving the overall protection level of the switch cabinet.

[0051] Implementation Results: Through the above-described specific implementation methods, the high-protection-level high-current switchgear of this utility model not only improves the protection level but also significantly enhances the safety and reliability of the system. The isolation and fixation between electrical components are more robust, reducing the risk of failures caused by external environmental factors or loose internal connections, thus ensuring the stable operation of the power system. Simultaneously, the switchgear design is more rational, compact, and easy to maintain, significantly reducing maintenance costs and improving work efficiency.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-current switchgear with a high protection level, characterized in that: This includes the cabinet frame, busbar system, control busbar system, PE busbar system, and N busbar system; The cabinet frame consists of metal columns, beams and partitions, which divide the internal space of the cabinet into a busbar cavity, a control cavity and a PE / N busbar cavity. The busbar system includes horizontal busbars and branch busbars. The horizontal busbars are fixed to the top of the busbar cavity by T-bolts and are vertically connected to the branch busbars by a square reversing structure. The control bus system integrates four-phase busbars and is embedded in the insulating bracket of the control cavity, and is electrically connected to the branch busbars through copper busbars; The PE busbar system and the N busbar system each use multi-faceted aluminum alloy profiles, which are fixed to both sides of the PE / N busbar cavity by slots and connected to the grounding of the cabinet frame. Modular busbar clamps can be detachably installed on the cabinet frame beams to support horizontal busbars and branch busbars.

2. The high-current switchgear with high protection level according to claim 1, characterized in that: The aluminum alloy profiles of the horizontal busbars are connected by T-bolts, which reduces the number of connection specifications and improves dynamic and thermal stability.

3. The high-current switchgear with high protection level according to claim 1, characterized in that: The multi-faceted aluminum alloy profile design of the PE busbar system and N busbar system includes multiple fixed surfaces, supporting simultaneous multi-directional wiring.

4. A high-current switchgear with high protection level according to claim 1, characterized in that: The integrated design of the four-phase busbars in the control busbar system is fixed by an integrated structure, which improves wiring efficiency and dynamic and thermal stability.

5. A high-current switchgear with high protection level according to claim 1, characterized in that: The square commutation structure of the branch busbar includes a 90° bent copper busbar, which is used to adapt to the fixing of the current transformer and the directional connection of the copper busbar.

6. A high-current switchgear with high protection level according to claim 1, characterized in that: The modular busbar clamp is installed on the cabinet frame through a detachable structure, supporting the horizontal busbar, branch busbar and control busbar.

7. A high-protection-level high-current switchgear according to claim 1, characterized in that: The partition plate is sealed to the cabinet frame to achieve physical isolation between the chambers.

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