Compact low-voltage switch conflux cabinet

Abstract

The utility model provides a compact low-voltage switch confluence cabinet, which comprises a cabinet body and a total confluence copper bar, the cabinet body is arranged in a photovoltaic box-type substation, and a frame circuit breaker is arranged at the upper end in the cabinet body; molded case circuit breakers are arranged below the frame circuit breaker, and the molded case circuit breakers are distributed on the front surface and the side surface of the cabinet body. The total bus copper bar is vertically arranged in the cabinet body and is connected with the output end of the frame circuit breaker; according to the utility model, the frame circuit breaker, the molded case circuit breaker and the total bus copper bar are integrated in one cabinet body, so that the overall occupied area is smaller; and meanwhile, the molded case circuit breakers are distributed on the front surface and the side surface of the cabinet body, so that the number of outgoing lines is larger, the cost performance is higher, and the cabinet can be suitable for a 20HC box transformer substation with a larger capacity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of busbar cabinet, specifically is a compact low voltage switch busbar cabinet. BACKGROUND

[0002] In photovoltaic power generation system, the box type substation integrates the busbar cabinet and transformer, high voltage cabinet and other equipment into a steel structure container, wherein the busbar cabinet is located in the low voltage chamber. The popular busbar cabinet of the box type substation adopts double cabinet design, the structure is that the middle cabinet is located in the middle of two cabinets, and the middle cabinet is connected with the upper ends of the two cabinets, the frame circuit breaker is arranged in the middle cabinet, the current is converged to the two cabinets through copper bar, and a large number of molded case circuit breakers are arranged in the two cabinets.

[0003] For the large capacity box type substation (20HC) export product, if the capacity is more than 8MW, the low voltage chamber is compressed due to the increase of the transformer, the previously popular double cabinet design is not compact enough, the space below the middle cabinet is not utilized, and the box type substation with a capacity of more than 8MW cannot be installed on the box type substation; therefore, the utility model provides a compact low voltage switch busbar cabinet. UTILITY MODEL CONTENTS

[0004] The utility model aims at improving and innovating in view of the shortcomings and problems in the background art, and solves the problem that the existing busbar cabinet is not suitable for large capacity box type substation, and provides a compact low voltage switch busbar cabinet.

[0005] A compact low voltage switch busbar cabinet comprises:

[0006] A cabinet body is installed in a photovoltaic box type substation, and a cabinet door is installed on the front surface of the cabinet body;

[0007] A frame circuit breaker is arranged on the upper end of the cabinet body;

[0008] A molded case circuit breaker is arranged below the frame circuit breaker, and the molded case circuit breaker is distributed on the front surface and the side surface of the cabinet body;

[0009] A total copper bar is vertically arranged in the cabinet body, and the total copper bar is connected with the output end of the frame circuit breaker;

[0010] A first sub copper bar is installed on the total copper bar, and the incoming line copper bar of the molded case circuit breaker corresponding to the front surface of the cabinet body is installed on the first sub copper bar;

[0011] A second sub copper bar is installed on the first sub copper bar, and the incoming line copper bar of the molded case circuit breaker corresponding to the side surface of the cabinet body is installed on the second sub copper bar.

[0012] A further solution is that the molded case circuit breaker is provided with two layers, wherein the outgoing copper busbar of the upper molded case circuit breaker corresponding to the front surface of the cabinet is located on the side of the outgoing copper busbar of the lower molded case circuit breaker corresponding to the front surface of the cabinet away from the front surface of the cabinet; the outgoing copper busbar of the upper molded case circuit breaker corresponding to the side of the cabinet is located on the side of the outgoing copper busbar of the lower molded case circuit breaker corresponding to the side of the cabinet away from the side of the cabinet.

[0013] A further solution is that a molded case circuit breaker mounting plate is installed inside the cabinet, an insulating support plate is installed on the molded case circuit breaker mounting plate, and the bottom surface of the molded case circuit breaker is installed on the insulating support plate.

[0014] A further solution is that a support frame is provided in the middle of the cabinet, and the molded case circuit breaker mounting plate is mounted on the support frame or the inner wall of the cabinet.

[0015] A further solution is that a first fan is installed on the top wall of the cabinet, and the air outlet direction of the first fan is upward; a second fan is also provided inside the cabinet, and the second fan is installed on a fan support plate, and the fan support plate is connected to the molded case circuit breaker mounting plate corresponding to the molded case circuit breaker located on the upper layer, and the air outlet direction of the second fan is also upward.

[0016] A further solution is that secondary line compartments are opened on both sides of the upper end of the cabinet, the secondary line compartments are arranged on both sides of the frame circuit breaker, and a control unit is arranged in the secondary line compartments.

[0017] A further solution is that at least the main busbar is clamped with an insulating busbar clamp, and the insulating busbar clamp is installed on a cabinet or a supporting frame.

[0018] A further solution is that the support frame and the molded case circuit breaker mounting plate are made of aluminum-zinc coated steel sheets, and the insulating support plate and the insulating busbar clamp are made of glass fiber reinforced composite materials.

[0019] A further solution is that a molded case circuit breaker handle is provided on the molded case circuit breaker, and the molded case circuit breaker handle protrudes from the cabinet.

[0020] A further solution is that a plurality of pressure strips are installed at the front end of the cabinet, and the pressure strips are used to separate the molded case circuit breaker and the cabinet door.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) the present invention integrates the frame circuit breaker, the molded case circuit breaker and the main busbar into one cabinet, which reduces the overall footprint; at the same time, the molded case circuit breakers are distributed on the front surface and side of the cabinet, which increases the number of outgoing lines and improves the cost-effectiveness, and is applicable to larger capacity 20HC box transformers;

[0022] (2) the lower outgoing line of the molded case circuit breaker, the outgoing copper bar of the upper molded case circuit breaker is also the lower outgoing line, and the outgoing position is at the position behind the outgoing copper bar of the lower molded case circuit breaker; this outgoing mode can utilize the bottom area, and is beneficial to the maximum outgoing line number;

[0023] (3) the connecting surface of the cabinet body and the transformer is opened and not sealed, thereby facilitating wiring from the rear;

[0024] (4) the general copper bus bar is converged in the middle of the cabinet body, the corresponding convergence points of the upper molded case circuit breaker and the lower molded case circuit breaker on the front surface of the cabinet body correspond to different first sub-convergence copper bus bars, and the corresponding convergence points of the upper molded case circuit breaker and the lower molded case circuit breaker on the side surface of the cabinet body correspond to different second sub-convergence copper bus bars; the first sub-convergence copper bus bar and the second sub-convergence copper bus bar can be selected according to the actual current size and temperature rise design, thereby avoiding the size of the copper bus bar being too large and reducing the waste of the copper bus bar;

[0025] (5) the first fan and the second fan are used for heat dissipation of the cabinet body, and the heat dissipation effect is good;

[0026] (6) the molded case circuit breaker is designed in a double-layer mode, and in the case of guaranteeing electrical clearance and cable bending, as many lines as possible can be added;

[0027] (7) the handle of the molded case circuit breaker protrudes from the cabinet body, the molded case circuit breaker can be operated without opening the cabinet body, the operation of the staff is facilitated, and the risk of electric shock or other safety hazards that the staff may face when opening the cabinet door is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 A structure diagram of a prior art convergence cabinet provided by the embodiments of the present application;

[0030] Figure 2 A three-dimensional structure diagram of a compact low-voltage switch convergence cabinet provided by the embodiments of the present application;

[0031] Figure 3 A three-dimensional structure diagram of a compact low-voltage switch convergence cabinet provided by the embodiments of the present application; Figure 2 A local enlarged structure diagram at position A in the middle;

[0032] Figure 4 A front structure schematic view of a compact low-voltage switch busbar cabinet provided by the embodiment of the utility model (not including cabinet door);

[0033] Figure 5 A back structure schematic view of a compact low-voltage switch busbar cabinet provided by the embodiment of the utility model;

[0034] Figure 6 A schematic view of the arrangement structure of the copper bars inside the cabinet body provided by the embodiment of the utility model.

[0035] The drawing mark: cabinet body 1, cabinet door 2, support skeleton 3, frame circuit breaker 4, molded case circuit breaker 5, molded case circuit breaker handle 51, insulated busbar clamp 6, insulated support plate 7, pressing strip 8, first fan 9, second fan 10, secondary line compartment 11, total busbar copper bar 12, first sub-busbar copper bar 13, second sub-busbar copper bar 14, incoming line copper bar 15, outgoing line copper bar 16. DETAILED DESCRIPTION

[0036] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model will be described in detail below with reference to the drawings.

[0037] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0039] As shown in the accompanying drawings, Figure 1 The prior art busbar cabinet adopts double-cabinet design, which is suitable for 7MW and below box-type substation (20HC) outlet products, the structure is that the middle cabinet is located between the two cabinets, and the middle cabinet is connected with the upper ends of the two cabinets, the frame circuit breaker is arranged in the middle cabinet, the current is converged to the two cabinets through the copper bars, and a large number of molded case circuit breakers are arranged in the two cabinets. Figure 1As can be seen in the figure, the dual-cabinet design is not compact enough, and the space below the middle cabinet is not utilized. For large-capacity box-type substations (20HC) for export, if the capacity exceeds 8MW, the increased size of the transformer will cause the low-voltage compartment to be compressed, making the combiner cabinet unsuitable for installation on box-type substations with capacities exceeding 8MW. Therefore, a combiner cabinet that fully utilizes the space below the middle cabinet is required. This will result in a smaller footprint, a larger number of outgoing lines, and a more compact plastic shell arrangement, making it suitable for box-type substations (20HC) for export exceeding 8MW. Therefore, this application was created.

[0040] The following is combined with Figures 2-6 The utility model is further described.

[0041] See also Figure 2 、 Figure 4 and Figure 5 The utility model provides a compact low-voltage switchgear cabinet, including a cabinet body 1, which is installed in the low-voltage room of a photovoltaic box-type substation. A cabinet door 2 is installed on the front surface of the cabinet body 1, and the rear surface of the cabinet body 1 is the connection surface connected to the transformer. The rear surface of the cabinet body 1 is open and not sealed, so as to facilitate wiring from the rear. A support frame 3 is provided in the middle of the cabinet body 1. The cabinet body 1 and the support frame 3 are made of aluminum-zinc coated plate, which supports the weight of the electrical equipment in the cabinet body 1. Two frame circuit breakers 4 are symmetrically installed at the upper end of the interior of the cabinet body 1; the incoming end of the frame circuit breaker 4 is connected to the transformer through a copper bus. Two layers of molded case circuit breakers 5 are also provided in the cabinet body 1. The molded case circuit breakers 5 are arranged below the frame circuit breaker 4, and the molded case circuit breakers 5 are distributed on the front surface and left and right sides of the cabinet body 1. The outgoing end of the frame circuit breaker 4 is connected to the main bus copper bus 12, and the main bus copper bus 12 is vertically arranged in the cabinet body 1. It can be seen that the frame circuit breaker 4, the molded case circuit breaker 5 and the main bus copper bar 12 are all integrated into one bus cabinet. There is no unused space below the middle cabinet of the previously popular bus cabinet. With a smaller overall footprint, since the molded case circuit breaker 5 is distributed not only on the front surface of the cabinet 1, but also on the left and right sides of the cabinet 1, the number of outgoing lines is more, the cost-effectiveness is higher, and it can be applied to larger capacity 20HC box transformers.

[0042] See also Figures 4-6The outgoing end of each frame circuit breaker 4 is connected with two general busbars 12 arranged side by side, each general busbar 12 is installed with a first sub busbar 13, and the installed first sub busbar 13 is connected with the incoming busbar 15 of the upper plastic shell circuit breaker 5 and the lower plastic shell circuit breaker 5 on the front surface of the cabinet 1 respectively. The end of the first sub busbar 13 is installed with a second sub busbar 14, the incoming busbar 15 of the plastic shell circuit breaker 5 on the side surface of the cabinet 1 is installed on the second sub busbar 14, and the first sub busbar 13 and the second sub busbar 14 are horizontally arranged in the cabinet 1. Since the corresponding converging points of the upper plastic shell circuit breaker 5 and the lower plastic shell circuit breaker 5 on the front surface of the cabinet 1 correspond to different first sub busbars 13, and the corresponding converging points of the upper plastic shell circuit breaker 5 and the lower plastic shell circuit breaker 5 on the side surface of the cabinet 1 correspond to different second sub busbars 14, the first sub busbar 13 and the second sub busbar 14 can be selected according to the actual current size and temperature rise design, so as to avoid the size of the copper bar being too large and reduce the waste of the copper bar.

[0043] Please continue to refer to Figure 4 and Figure 6 The appearance position of the outgoing busbar 16 of the upper plastic shell circuit breaker 5 on the front surface of the cabinet 1 extends to the bottom area, and is located on the side away from the front surface of the cabinet 1 of the outgoing busbar 16 of the lower plastic shell circuit breaker 5 on the front surface of the cabinet 1; the outgoing position of the outgoing busbar 16 of the upper plastic shell circuit breaker 5 on the side surface of the cabinet 1 also extends to the bottom area, and is located on the side away from the side surface of the cabinet 1 of the outgoing busbar 16 of the lower plastic shell circuit breaker 5 on the side surface of the cabinet 1. That is, the outgoing busbar 16 of the upper plastic shell circuit breaker 5 and the lower plastic shell circuit breaker 5 is all outgoing from the lower, and the outgoing position is at the rear position of the outgoing busbar 16 of the lower plastic shell circuit breaker 5; this outgoing mode can utilize the bottom area of the cabinet 1, and is beneficial to the maximum outgoing line number.

[0044] Please continue to refer to Figure 6 The cabinet 1 is internally installed with a plastic shell circuit breaker mounting plate, the plastic shell circuit breaker mounting plate is installed with an insulating support plate 7, and the bottom surface of the plastic shell circuit breaker 5 is mounted on the insulating support plate 7. The plastic shell circuit breaker mounting plate is mounted on the support skeleton 3 or the inner wall of the cabinet 1. The plastic shell circuit breaker mounting plate is also made of aluminum-zinc coated plate, and is used to bear the weight of the plastic shell circuit breaker 5. The insulating support plate 7 can be made of glass fiber reinforced composite material, and plays an insulating role. It should be noted that the plastic shell circuit breaker mounting plate does not extend from the rear surface of the cabinet 1 to the front surface of the cabinet 1, that is, the plastic shell circuit breaker mounting plate does not transversely separate the cabinet 1, and the plastic shell circuit breaker mounting plate is not shown in the figure.

[0045] The first fan 9 is a centrifugal fan and draws air from bottom to top.

[0046] Please refer to Figure 5 and Figure 6 The insulating bus clamp 6 is clamped on the total copper bus 12, the first sub-copper bus 13, the second sub-copper bus 14 and the incoming line copper bus 15, and is installed on the cabinet 1 or the support framework 3.

[0047] Preferably, please refer to Figure 4 The cabinet 1 is provided with a plurality of pressing strips 8 at the front end, and the pressing strips 8 are used to separate the molded case circuit breaker 5 and the cabinet door 2.

[0048] Please refer to Figure 2 and Figure 3 The molded case circuit breaker 5 is provided with a molded case circuit breaker handle 51, and the molded case circuit breaker handle 51 protrudes from the cabinet 1.

[0049] Please refer to Figure 2 and Figure 4 The cabinet 1 is provided with a secondary line compartment 11 at the upper end of both sides, and the secondary line compartment 11 is arranged on both sides of the frame circuit breaker 4 and does not occupy the installation space of the molded case circuit breaker 5.

[0050] In summary, the frame circuit breaker 4, the molded case circuit breaker 5 and the total copper bus 12 are integrated into a cabinet 1, and the overall land area is smaller.

[0051] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A compact low-voltage switchgear cabinet, characterized in that: include: A cabinet (1), wherein the cabinet (1) is installed in a photovoltaic box-type substation, and a cabinet door (2) is installed on the front surface of the cabinet (1); A frame circuit breaker (4), the frame circuit breaker (4) being arranged at the upper end inside the cabinet (1); A molded case circuit breaker (5), the molded case circuit breaker (5) being arranged below the frame circuit breaker (4), and the molded case circuit breaker (5) being distributed on the front surface and side surfaces of the cabinet (1); A main bus copper bar (12), the main bus copper bar (12) is vertically arranged in the cabinet (1), and the main bus copper bar (12) is connected to the output end of the frame circuit breaker (4); A first branch busbar (13), the first branch busbar (13) being mounted on the main busbar (12), and an incoming copper busbar (15) of a molded case circuit breaker (5) corresponding to the front surface of the cabinet (1) being mounted on the first branch busbar (13); A second branch busbar (14) is mounted on the first branch busbar (13), and an incoming copper busbar (15) of a molded case circuit breaker (5) corresponding to a side of the cabinet (1) is mounted on the second branch busbar (14).

2. A compact low-voltage switchgear cabinet according to claim 1, characterized in that: The molded case circuit breaker (5) is provided with two layers, wherein the outlet position of the outlet copper bar (16) of the upper molded case circuit breaker (5) corresponding to the front surface of the cabinet (1) is located on the side of the outlet copper bar (16) of the lower molded case circuit breaker (5) corresponding to the front surface of the cabinet (1) away from the front surface of the cabinet (1); and the outlet position of the outlet copper bar (16) of the upper molded case circuit breaker (5) corresponding to the side of the cabinet (1) is located on the side of the outlet copper bar (16) of the lower molded case circuit breaker (5) corresponding to the side of the cabinet (1) away from the side of the cabinet (1).

3. The compact low-voltage switchgear cabinet according to claim 1, characterized in that: A molded case circuit breaker mounting plate is installed inside the cabinet (1), an insulating support plate (7) is installed on the molded case circuit breaker mounting plate, and the bottom surface of the molded case circuit breaker (5) is installed on the insulating support plate (7).

4. A compact low-voltage switchgear cabinet according to claim 3, characterized in that: A support frame (3) is provided in the middle of the cabinet (1), and the molded case circuit breaker mounting plate is mounted on the support frame (3) or the inner wall of the cabinet (1).

5. The compact low-voltage switchgear cabinet according to claim 1, characterized in that: A first fan (9) is installed on the top wall of the cabinet (1), and the air outlet direction of the first fan (9) is upward; a second fan (10) is also provided inside the cabinet (1), and the second fan (10) is installed on a fan support plate, and the fan support plate is connected to the molded case circuit breaker mounting plate corresponding to the molded case circuit breaker (5) located on the upper layer, and the air outlet direction of the second fan (10) is also upward.

6. The compact low-voltage switchgear cabinet according to claim 1, characterized in that: Secondary line compartments (11) are provided on both sides of the upper end of the cabinet (1), the secondary line compartments (11) are arranged on both sides of the frame circuit breaker (4), and a control unit is arranged in the secondary line compartments (11).

7. The compact low-voltage switchgear cabinet according to claim 4, characterized in that: At least the main bus copper bar (12) is clamped with an insulating busbar clamp (6), and the insulating busbar clamp (6) is installed on the cabinet (1) or the supporting frame (3).

8. The compact low-voltage switchgear cabinet according to claim 7, characterized in that: The support frame (3) and the molded case circuit breaker mounting plate are made of aluminum-zinc coated sheets, and the insulating support plate (7) and the insulating busbar clamp (6) are made of glass fiber reinforced composite materials.

9. The compact low-voltage switchgear cabinet according to claim 1, characterized in that: The molded case circuit breaker (5) is provided with a molded case circuit breaker handle (51), and the molded case circuit breaker handle (51) protrudes from the cabinet (1).

10. The compact low-voltage switchgear cabinet according to claim 1, characterized in that: A plurality of pressure strips (8) are installed at the front end of the cabinet body (1), and the pressure strips (8) are used to separate the molded case circuit breaker (5) and the cabinet door (2).

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