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CN-224204602-U - High-protection-level high-current switch cabinet

CN224204602UCN 224204602 UCN224204602 UCN 224204602UCN-224204602-U

Abstract

The utility model relates to a high-protection-level high-current switch cabinet, and belongs to the field of electrical cabinets. The switch cabinet comprises a cabinet body frame, a control bus system, a modularized bus clamp and a modularized bus bar, wherein the cabinet body frame consists of metal upright posts, cross beams and partition plates, the partition plates divide a cabinet inner space into a bus cavity, a control cavity and PE/N bus cavities, the bus system comprises horizontal buses and branched bus bars, the horizontal buses are fixed on the tops of the bus cavities through T-shaped bolts and are vertically connected with the branched bus bars through square reversing structures, the control bus system is integrated with four-phase buses and embedded into an insulating bracket of the control cavity and is electrically connected with the branched bus bars through copper bars, the PE bus system and the N bus system are respectively made of multi-surface aluminum alloy sections, are fixed on two sides of the PE/N bus cavities through clamping grooves and are connected with the cabinet body frame in a grounding mode, and the modularized bus clamp is detachably arranged on the cabinet body frame cross beams and used for supporting the horizontal buses and the branched bus bars. Compared with the traditional low-voltage switch cabinet, the switch cabinet has high overall safety and good reliability.

Inventors

  • CHEN CHANG

Assignees

  • 中冶赛迪电气技术有限公司

Dates

Publication Date
20260505
Application Date
20250527

Claims (7)

  1. 1. The high-protection-level high-current switch cabinet is characterized by comprising a cabinet body frame, a bus system, a control bus system, a PE bus system and an N bus system; The cabinet body frame consists of metal upright posts, a cross beam and a partition plate, wherein the partition plate divides 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, wherein 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 the four-phase bus and embedded into an 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 multi-surface aluminum alloy sections, are fixed on two sides of the PE/N bus cavity through clamping grooves, and are grounded and connected with the cabinet frame; The modularized bus clamp is detachably arranged on the cabinet frame cross beam and used for supporting the horizontal bus and the branch bus bars.
  2. 2. The high-protection-level high-current switch cabinet of claim 1, wherein the aluminum alloy sections of the horizontal bus bars are connected through T-shaped bolts, so that the connection specification is reduced, and the dynamic heat stability is improved.
  3. 3. The high protection level high current switchgear of claim 1 wherein the multi-sided aluminum alloy profile design of the PE and N bus bar systems comprises multiple fixation surfaces supporting simultaneous multi-directional wiring.
  4. 4. The high-protection-level high-current switch cabinet of claim 1, wherein the four-phase bus integrated design of the control bus system is fixed through an integrated structure, and wiring efficiency and dynamic heat stability are improved.
  5. 5. The high-protection-level high-current switch cabinet of claim 1, wherein the square reversing structure of the branch busbar comprises a 90-degree bent copper bar, and the square reversing structure is used for adapting the fixation of a current transformer and the steering connection of the copper bar.
  6. 6. The high-protection-level high-current switch cabinet of claim 1, wherein the modular bus bar is mounted to the cabinet frame by a detachable structure and supports the horizontal bus bar, the branch bus bar and the control bus bar.
  7. 7. The high-protection-level high-current switch cabinet of claim 1, wherein the separation plate is in sealing connection with the cabinet frame to realize physical isolation among the chambers.

Description

High-protection-level high-current switch cabinet Technical Field The utility model belongs to the field of electrical cabinets, and relates to a high-protection-level high-current switch cabinet. Background In an electric power system, a low-voltage switch cabinet is used as key equipment for electric energy distribution and control, and is widely applied to the fields of industry, commerce and civilian use. However, the problem of low protection level of the conventional low-voltage switch cabinet is common in design and application, which is particularly prominent in some application scenes with severe environments. For example, in humid, dusty, highly corrosive or explosive environments, conventional low voltage switchgear is prone to damage to internal electrical components due to external environmental factors, thereby affecting the stable operation of the entire power system and possibly even causing safety accidents. In particular, the low protection level of conventional low-voltage switchgear is mainly manifested in the following aspects: The structure design is unreasonable, the cabinet body structure of the traditional low-voltage switch cabinet is easy to be simpler, and the effective separation design is lacking, so that electric elements with different functions (such as a bus system, a control bus system, a PE bus system and an N bus system) are mixed together, the maintenance difficulty is increased, and the overall safety and reliability are reduced. The bus system is complex in connection, namely the connection of the horizontal bus and the branch bus of the traditional low-voltage switch cabinet is usually realized by adopting a traditional bolt or welding mode, and the mode is complex in connection, various in specification and difficult to adapt to the requirements of different current levels and installation environments. Meanwhile, the dynamic and thermal stability is poor, and the phenomenon of loosening or overheating is easy to occur under long-time operation or large current impact. PE bus and N bus of traditional low-voltage switch cabinet usually adopt simple cable or copper bar fixed mode, and is fixed unstably and the wiring is inconvenient, is difficult to satisfy the demand of multi-direction wiring. In addition, this fixing method also increases the grounding resistance, and reduces the reliability of the grounding system. The control bus system of the traditional low-voltage switch cabinet is often in a distributed design, the number of buses is large, wiring is complex, the risk of wiring errors is increased, and wiring efficiency is reduced. Meanwhile, due to the lack of an effective dynamic and thermal stability design, the control bus is easy to loose or overheat in the long-time operation process. The bus-bar clamp is unstable in support, namely, the bus-bar clamp of the traditional low-voltage switch cabinet is generally designed in an integrated mode, and the bus-bar clamp is difficult to adapt to the support requirements of buses with different specifications. Meanwhile, due to the lack of a detachable structure, the bus bar clamp is difficult to install and maintain. The protection level is insufficient, the cabinet body frame and the partition plate of the traditional low-voltage switch cabinet often adopt non-sealing design, and invasion of external environment factors (such as dust, moisture, corrosive gas and the like) is difficult to effectively prevent. This not only reduces the overall protection level of the switchgear but also increases the risk of damaging the electrical components. Disclosure of utility model In view of the above, the utility model aims to provide a high-protection-level high-current switch cabinet, which effectively solves the problems existing in the application of the traditional low-voltage switch cabinet in a severe environment and improves the overall safety and reliability of the switch cabinet by optimizing the measures of a cabinet body frame structure, a bus system connection mode, a PE/N bus system fixing and wiring mode, a bus system wiring mode, a bus clamp supporting mode, sealing performance of a cabinet body frame and a partition plate and the like. The high-protection-level high-current switch cabinet comprises a cabinet body frame, a bus system, a control bus system, a PE bus system and an N bus system, wherein the cabinet body frame is composed of metal upright posts, cross beams and partition plates, the cabinet body frame divides a cabinet inner space into a bus cavity, the control cavity and the PE/N bus cavity, the bus system comprises horizontal buses and branch bus bars, the horizontal buses are fixed on the top of the bus cavity through T-shaped bolts and are vertically connected with the branch bus bars through square reversing structures, the control bus system is integrated with four-phase buses and embedded into an insulating bracket of the control cavity, the control bus system is electrically connected w