Switch cabinet metering lifting bus device

Abstract

The utility model relates to the technical field of bus lifting devices, and discloses a switch cabinet bus metering and lifting device which comprises components and a metering and lifting bus group used for connecting the components, and the metering and lifting bus group is connected with incoming and outgoing lines such as circuit breakers of a left switch cabinet and a right switch cabinet through three-phase main buses. Wherein the components comprise a current transformer, a fuse, a voltage transformer, a wall bushing, an insulator and a rear cabinet body; and the current transformer is fixed at the rear middle position of the rear cabinet body. The voltage transformer is fixed at the bottom of the rear cabinet body; the fuse is arranged at the upper end of the voltage transformer; the wall bushing is fixed on the right side of the switch cabinet body; the three-phase main bus comprises an A-phase main bus, a B-phase main bus and a C-phase main bus which are arranged up and down, and a certain insulation distance is kept among the A-phase main bus, the B-phase main bus and the C-phase main bus.

Description

Technical Field

[0001] The utility model relates to the technical field of busbar lifting devices, in particular to a switch cabinet metering busbar lifting device. Background Art

[0002] In traditional switchgear metering solutions, metering components and connecting busbars are often dispersed across different cabinets, making installation and maintenance complex and potentially leading to increased busbar usage and unstable electrical connections. Therefore, this application proposes a solution that integrates metering components and connecting busbars into a single switchgear to improve system stability and reliability. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention provides a switch cabinet metering busbar lifting device, which solves the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A switchgear metering busbar device includes components and a metering busbar assembly for connecting the components. The metering busbar assembly is connected to the circuit breakers and other incoming and outgoing lines of the left and right switchgear via a three-phase main busbar. The components include current transformers, fuses, voltage transformers, wall bushings, insulators, and a rear cabinet.

[0006] The current transformer is fixed at the rear middle position of the rear cabinet.

[0007] The voltage transformer is fixed at the bottom of the rear cabinet;

[0008] The fuse is at the upper end of the voltage transformer;

[0009] The wall bushing is fixed on the right side of the switch cabinet body;

[0010] The three-phase main busbar includes an A-phase main busbar, a B-phase main busbar, and a C-phase main busbar arranged vertically, and a certain insulation distance is maintained between the A-phase main busbar, the B-phase main busbar, and the C-phase main busbar;

[0011] The metering lifting busbar group includes an A vertical busbar, a B vertical busbar and an A phase transfer busbar connected to the A phase main busbar, a C vertical busbar connected to the B phase main busbar, and a D vertical busbar, an E vertical busbar, an F vertical busbar and a C phase horizontal transfer busbar connected to the C phase main busbar; wherein, the B vertical busbar is fixed to the left front end of the rear cabinet by an insulator, and the F vertical busbar is fixed to the right front end of the rear cabinet by an insulator.

[0012] Preferably, the A-phase main busbar enters from the left end of the switch cabinet and connects to the upper end of the A vertical busbar; the lower end of the A vertical busbar is connected to the upper terminal of the current transformer; one end of the B vertical busbar is connected to the lower terminal of the current transformer, and the other end is connected to the A-phase transfer busbar to transfer the current from the vertical direction back to the horizontal direction and connect to the right end of the A-phase main busbar and to the adjacent switch cabinet.

[0013] Preferably, the B-phase main bus enters from the left end of the switch cabinet and is connected to the C vertical bus, and the C vertical bus extends to the right wall bushing and transmits current to the adjacent switch cabinet.

[0014] Preferably, the upper end of the fuse is connected to the B vertical bus, the C vertical bus and the F vertical bus respectively through the first bus; the lower end of the fuse is connected to the voltage transformer through the second bus.

[0015] Preferably, the C-phase main bus enters from the left end of the switch cabinet and is connected to the D vertical bus, and is connected to the E vertical bus located on the right side of the switch cabinet through the C-phase horizontal transfer bus; the other end of the E vertical bus is connected to the upper terminal of the current transformer, and one end of the F vertical bus is connected to the lower terminal of the current transformer, and the other end is connected to the right end of the C-phase main bus to the adjacent switch cabinet.

[0016] The utility model provides a switch cabinet metering lifting busbar device, which has the following beneficial effects:

[0017] 1. This application achieves good insulation performance during the design and installation process through the reasonable arrangement of fixed positions between components, the upper, middle and lower layout of the three-phase main busbar, and the application of insulators, ensuring the safe and reliable operation of the system. The metering and busbar lifting functions are realized with one switchgear, which occupies a small area and can effectively reduce the amount of connecting busbars. It is widely used in 10kV medium-voltage distribution system solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the metering lifting busbar group of the utility model;

[0020] Figure 3 This is a schematic diagram of the circuit structure of the utility model.

[0021] In the figure: 1. Metering and lifting busbar group; 11. A vertical busbar; 111. A-phase transfer busbar; 12. B vertical busbar; 13. C vertical busbar; 14. D vertical busbar; 15. E vertical busbar; 16. F vertical busbar; 222. C-phase horizontal transfer busbar; 2. Current transformer; 3. Fuse; 31. First busbar; 32. Second busbar; 4. Voltage transformer; 5. Wall bushing; 6. Insulator; 7. Rear cabinet. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0023] In the description of the present invention, it should be understood that the terms "transverse", "longitudinal", "end", "edge", "sidewall", "up", "down", "upper part", "lower part", "directly above", "surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "end", "head", "tail", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the technical solution of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0024] This application proposes a switch cabinet metering busbar lifting device, which is as follows:

[0025] For reference Figure 1 The switchgear metering busbar device of this application is a line-in and line-out solution completed by connecting various components and connecting the circuit breakers of the left and right switchgears through the three-phase main busbar of the circuit breaker to meet the following requirements: Figure 3 A plan diagram of Figure 3 On the first plan diagram, the following is proposed Figure 1 and Figure 2 The specific structural layout in.

[0026] For reference Figure 1 The components include a current transformer 2, a fuse 3, a voltage transformer 4, a wall bushing 5, an insulator 6, and a rear cabinet 7. The components are fixed in the following manner: the current transformer 2 is first fixed in the rear middle position of the rear cabinet 7, the voltage transformer 4 is fixed at the bottom of the rear cabinet, the fuse 3 is at the upper end of the voltage transformer 4, and the wall bushing 5 is fixed on the right side of the cabinet. This arrangement of fixed positions helps to maintain a reasonable distance between the components, prevent electrical short circuits, and ensure the safe operation of the system.

[0027] For reference Figure 2 The three-phase main busbar includes the A-phase main busbar, the B-phase main busbar, and the C-phase main busbar, which are arranged up and down, so that the distance between phases and between phases and the ground is sufficient, avoiding mutual interference between different phase busbars and ensuring the insulation performance of the system.

[0028] When arranging the A-phase main busbar:

[0029] The A-phase main bus is introduced from the left end of the switch cabinet and connected to the upper end of the A vertical bus 11 in the metering lifting bus group 1; the lower end of the A vertical bus 11 is connected to the upper terminal of the current transformer 2; thereby, the A-phase current is introduced from the left end of the switch cabinet and transmitted to the A-phase current to the current transformer 2 for current measurement.

[0030] Secure B vertical busbar 12 to the left front end of the rear switchgear via insulator 6, positioned in front of and behind A vertical busbar 11. Connect one end of B vertical busbar 12 to the lower terminal of current transformer 2, and the other end to A-phase transfer busbar 111. A-phase transfer busbar 111 transfers the current from the vertical direction back to the horizontal direction, connecting to the right end of the A-phase main busbar and extending to the adjacent switchgear. This receives the A-phase current measured by current transformer 2 and transmits it to A-phase transfer busbar 111. The measured A-phase current is then transmitted to the adjacent switchgear, completing the transmission path for the A-phase current.

[0031] Thus, vertical busbar B 12 transmits current from the lower terminal of current transformer 2 to phase A transfer busbar 111; phase A transfer busbar 111 is responsible for horizontally transferring the current from vertical busbar B 12 and transmitting it to the right-end phase A main busbar, which then extends to connect to the adjacent switchgear. This makes the overall structure clear, with a clear path from left-side input to right-side transmission, making it easy to understand and maintain. Furthermore, the combination of vertical and horizontal busbars effectively utilizes cabinet space, reduces unnecessary busbar bends, lowers electrical losses, and improves transmission efficiency. Furthermore, the rational layout of insulators and busbars ensures that insulation distance requirements are met, ensuring safety.

[0032] When arranging the B-phase main busbar:

[0033] The B-phase main busbar enters the left end of the switchgear and connects to the C vertical busbar 13. The C vertical busbar 13 extends to the right wall bushing 5. The continuation of the C vertical busbar 13 is then connected to the adjacent switchgear through the wall bushing 5. During operation, the B-phase current is drawn from the left end of the switchgear, transmitted to the C vertical busbar 13, and then transmitted to the adjacent switchgear through the wall bushing 5, completing the B-phase current transmission path.

[0034] The B-phase main busbar enters directly from the left side and is transmitted through the C vertical busbar 13 and the wall bushing 5, which reduces the complexity of the busbar. Fewer connection points and a straighter transmission path reduce electrical impedance and improve transmission efficiency. At the same time, due to the simple design, the busbar usage is relatively small, which reduces costs.

[0035] When arranging the C-phase main busbar:

[0036] Lead the C-phase main busbar from the left end of the cabinet and connect it to the D vertical busbar 14 located in the middle.

[0037] Connect the C-phase horizontal transfer busbar 222 to the E vertical busbar 15 located on the right side of the switchgear.

[0038] Connect one end of the E vertical busbar 15 to the upper terminal of the current transformer 2.

[0039] Fix the F vertical busbar 16 at the right front end of the rear cabinet through the insulator 6, connect one end to the lower pile head of the current transformer 2, and connect the other end to the right end of the C-phase main busbar. Extend the end connected to the right end of the C-phase main busbar to the adjacent switch cabinet.

[0040] During operation, the C-phase current is introduced from the left end of the switch cabinet and enters the D vertical bus 14, and the C-phase current is transferred from the D vertical bus 14 to the E vertical bus 15, changing the current direction and optimizing the wiring; during this period, the E vertical bus is connected to the current transformer 2 to transmit the C-phase current to the current transformer 2 for current measurement; and the connection between the current transformer 2 and the F vertical bus 16 can receive the C-phase current measured by the current transformer 2, and transmit it to the adjacent switch cabinet, completing the transmission path of the C-phase current.

[0041] Thus, through the combination of multiple vertical and horizontal busbars, the current path is dispersed and the risk of single-point overheating is reduced; the C-phase horizontal transfer busbar 222 provides more wiring flexibility to adapt to different cabinet structures and layout requirements.

[0042] Connecting fuses and voltage transformers:

[0043] The upper first busbar 31 of the fuse 3 is connected to the B vertical busbar 12, the C vertical busbar 13 and the F vertical busbar 16 respectively; to provide protection for the three-phase vertical busbars. When overcurrent or short circuit occurs, the fuse 3 can cut off the current and protect the equipment.

[0044] The lower end of the fuse 3 is connected to the voltage transformer 4 through the second busbar 32, and the current is transmitted to the voltage transformer 4 to perform voltage measurement. When necessary, protection is provided by the fuse 3.

[0045] Further explanation: By attaching insulators 6 to the left and right front ends of the rear cabinet 7, electrical isolation between the busbar and the cabinet is ensured, preventing leakage and short circuits. This ensures insulation performance between the busbar and the cabinet, preventing direct contact between devices with different potentials, and ensuring system safety and stability. Furthermore, the above-mentioned busbar layout creates a compact layout, thereby reducing unnecessary busbar extensions and enabling the same busbar to be used at multiple connection points. Furthermore, the combination of vertical and horizontal layouts optimizes the length of each busbar group, avoiding redundant wiring, effectively reducing busbar usage, and improving the system's cost-effectiveness and ease of installation.

[0046] In the present invention, the working steps of the device are as follows:

[0047] The A-phase current is introduced from the left end of the switch cabinet, enters the A vertical bus 11, and is transmitted to the A-phase current to the current transformer 2 for current measurement; the B vertical bus 12 receives the A-phase current measured by the current transformer and transmits it to the A-phase transfer bus 111. The A-phase transfer bus 111 transmits the measured A-phase current to the adjacent switch cabinet, completing the transmission path of the A-phase current; the B-phase current is introduced from the left end of the switch cabinet and transmitted to the C vertical bus 13; the B-phase current is transmitted to the adjacent switch cabinet through the wall bushing 5, completing the transmission path of the B-phase current; the C-phase current is introduced from the left end of the switch cabinet and enters the D vertical bus 14; the C-phase current is transferred from the D vertical bus 14 to the E vertical bus 15, changing the current direction and optimizing the wiring; the E vertical bus 15 transmits the C-phase current to the current transformer 2 for current measurement. The C-phase current measured by the current transformer 2 is received and transmitted to the adjacent switch cabinet, completing the transmission path of the C-phase current; the connection between the upper and lower ends of the fuse 3 plays a protective role during the process.

[0048] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art will appreciate that the present invention is not limited to the above embodiments and that various modifications and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such modifications and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A switch cabinet metering busbar lifting device, characterized by: The invention comprises components and a metering busbar assembly (1) for connecting the components, wherein the metering busbar assembly (1) is connected to circuit breakers and other incoming and outgoing lines of left and right switch cabinets via a three-phase main busbar; wherein the components include a current transformer (2), a fuse (3), a voltage transformer (4), a wall bushing (5), an insulator (6) and a rear cabinet (7); The current transformer (2) is fixed at the rear middle position of the rear cabinet (7); The voltage transformer (4) is fixed to the bottom of the rear cabinet (7); The fuse (3) is at the upper end of the voltage transformer (4); The wall bushing (5) is fixed on the right side of the switch cabinet body; The three-phase main busbar includes an A-phase main busbar, a B-phase main busbar, and a C-phase main busbar arranged vertically, and a certain insulation distance is maintained between the A-phase main busbar, the B-phase main busbar, and the C-phase main busbar; The metering and lifting busbar group (1) comprises an A vertical busbar (11), a B vertical busbar (12), and an A phase transfer busbar (111) connected to the A phase main busbar, a C vertical busbar (13) connected to the B phase main busbar, and a D vertical busbar (14), an E vertical busbar (15), an F vertical busbar (16), and a C phase transverse transfer busbar (222) connected to the C phase main busbar; wherein the B vertical busbar (12) is fixed to the left front end of the rear cabinet (7) through an insulator (6), and the F vertical busbar (16) is fixed to the right front end of the rear cabinet (7) through an insulator (6).

2. The switch cabinet metering busbar lifting device according to claim 1, characterized in that: The A-phase main busbar enters from the left end of the switch cabinet and is connected to the upper end of the A-vertical busbar (11); the lower end of the A-vertical busbar (11) is connected to the upper terminal of the current transformer (2); one end of the B-vertical busbar (12) is connected to the lower terminal of the current transformer (2), and the other end is connected to the A-phase transfer busbar (111) to transfer the current from the vertical direction back to the horizontal direction and connect to the right end of the A-phase main busbar and to the adjacent switch cabinet.

3. The switch cabinet metering busbar lifting device according to claim 1, characterized in that: The B-phase main busbar enters from the left end of the switch cabinet and is connected to the C vertical busbar (13). The C vertical busbar (13) extends to the right wall bushing (5) and transmits current to the adjacent switch cabinet.

4. The switch cabinet metering busbar lifting device according to claim 1, characterized in that: The upper end of the fuse (3) is connected to the B vertical bus (12), the C vertical bus (13) and the F vertical bus (16) respectively through the first bus (31); the lower end of the fuse (3) is connected to the voltage transformer (4) through the second bus (32).

5. The switch cabinet metering busbar lifting device according to claim 1, characterized in that: The C-phase main busbar enters from the left end of the switch cabinet and is connected to the D-vertical busbar (14), and is connected to the E-vertical busbar (15) located on the right side of the switch cabinet through the C-phase horizontal transfer busbar (222); the other end of the E-vertical busbar (15) is connected to the upper terminal of the current transformer (2), and one end of the F-vertical busbar (16) is connected to the lower terminal of the current transformer (2), and the other end is connected to the right end of the C-phase main busbar to the adjacent switch cabinet.

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