Multi-interval multi-outgoing-line fixed separation type low-voltage switchgear

Abstract

The utility model, which relates to the technical field of the electric power system, discloses a multi-interval multi-outgoing-line fixed separation type low-voltage switchgear in which a primary cable chamber, a main bus-bar chamber, a control cable chamber, a functional unit rear chamber, a vertical bus-bar chamber, a right circuit breaker chamber and a left circuit breaker chamber are arranged. The functional unit rear chamber, the right circuit breaker chamber and the left circuit breaker chamber are located at the front part of the cabinet body and are arranged in a layered manner from top to bottom. The beneficial effects of the utility model are that by adopting the arrangement mode of layering from top to bottom and arranging the left and right outgoing line loops on each layer, the number of outgoing lines of a single low-voltage switchgear is increased. And each path of outgoing line loop element is respectively arranged in an independent interval, so that a worker is prevented from touching an electrified body during operation, the fault influence range is limited, and the equipment safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of power system technology, and in particular to a fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines. Background Technology

[0002] 400V low-voltage switchgear is widely used in power systems. Common types of low-voltage switchgear on the market include: drawer-type, fixed-type, and fixed-partition type. Fixed-partition low-voltage switchgear, based on the characteristics of its components, performs functional partitioning, installing circuit elements in different compartments. Fixed-partition low-voltage switchgear offers superior safety performance compared to fixed-type, while being less expensive than drawer-type, making it a cost-effective option and popular in the market.

[0003] Existing fixed-section low-voltage switchgear has some technical shortcomings. For example, the number of internal compartments is limited, generally only 3 to 4; the compartment type is unreasonable, making wiring and maintenance inconvenient; a single low-voltage switchgear can only be configured with a limited number of outgoing circuits, generally a maximum of 11 outgoing circuits; and its ability to cope with faults is weak, for example, the vertical busbar enclosure is made of plastic sheeting, which will melt and break down during a short circuit, failing to provide adequate protection.

[0004] This research aims to address the shortcomings of existing fixed-section low-voltage switchgear by innovating its technology, improving the separation performance of low-voltage switchgear, adapting to new structures with multiple outgoing circuits, rationally separating and enclosing electrical components, increasing the number of electrical components that can be accommodated in a single cabinet, and ultimately enhancing product safety and ease of operation. This approach has promising market prospects. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a fixed-separation low-voltage switchgear with multiple intervals and multiple outgoing lines.

[0006] The purpose of this utility model is achieved through the following technical solution: a fixed-divided low-voltage switchgear with multiple bays and multiple outgoing lines, which includes a cabinet, and the cabinet has a primary cable compartment, a main busbar compartment, a control cable compartment, a functional unit rear compartment, a vertical busbar compartment, a right circuit breaker compartment, and a left circuit breaker compartment.

[0007] The primary cable compartment is located at the lower rear of the cabinet, and the main busbar compartment is located at the upper rear of the cabinet. The primary cable compartment and the main busbar compartment are separated by a busbar compartment partition. The main busbar compartment is used for the through connection of the main busbar, and the primary cable compartment is used for the connection of external cables.

[0008] The vertical busbar compartment is located in the middle of the cabinet and in front of the primary cable compartment, with equal distances to the left and right sides of the cabinet. The vertical busbar compartment runs through the primary cable compartment from top to bottom. Vertical busbars are arranged in the vertical busbar compartment to distribute current to the power distribution circuits of each layer.

[0009] The control cable compartment is located at the upper front of the cabinet and is used for the connection of control cables between the low-voltage switchgear.

[0010] The aforementioned functional unit rear compartment, right circuit breaker compartment, and left circuit breaker compartment are located at the front of the cabinet and are arranged in layers from top to bottom for installing circuit components.

[0011] The main busbar compartment includes a main busbar and a main busbar clamp. The main busbar is used for the transmission of the main current of the system after the cabinet is assembled, while the main busbar clamp supports the main busbar and is installed on the upper side of the cabinet. The upper part of the main busbar compartment is a top cover, which is a protruding structure. The top surface of the protruding structure is closed without openings, and the side of the protruding structure has a top cover side through hole.

[0012] The vertical busbar chamber is a closed space formed by the vertical busbar side plate and the vertical busbar cover plate.

[0013] The upper end of the vertical busbar is connected to the main busbar through a connecting bar to introduce the main busbar current into the cabinet. The vertical busbar is located in the middle of the cabinet and runs through the cabinet from top to bottom, and then leads out the molded case circuit breaker incoming line branch to the left and right sides.

[0014] The cabinet is equipped with a circuit breaker mounting plate, a layer partition plate, a circuit breaker compartment partition plate, a left panel, a right panel, a right rear sealing plate, and a left rear sealing plate; the circuit breaker mounting plate, layer partition plate, circuit breaker compartment partition plate, and left panel together form a left circuit breaker compartment; the circuit breaker mounting plate, layer partition plate, circuit breaker compartment partition plate, and right panel form a right circuit breaker compartment; the circuit breaker mounting plate, layer partition plate, right rear sealing plate, and left rear sealing plate form a functional unit rear chamber;

[0015] The circuit breaker mounting plate is equipped with a plug-in molded case circuit breaker, which is located in the left circuit breaker compartment or the right circuit breaker compartment; the rear compartment of the functional unit is equipped with a current transformer, a molded case circuit breaker incoming branch and an outgoing branch, and the current transformer is mounted on the molded case circuit breaker incoming branch.

[0016] The plug-in molded case circuit breaker is equipped with a circuit breaker operating mechanism. The left and right panels are equipped with an operating handle, indicator lights, and instruments. A rotating shaft is provided between the plug-in circuit breaker operating mechanism and the operating handle. One end of the rotating shaft is inserted into the circuit breaker operating mechanism, and the other end is inserted into the operating handle.

[0017] The vertical busbar is located in the middle of the cabinet. The vertical busbar leads to the left as a branch line for the molded case circuit breaker, providing current to the plug-in molded case circuit breaker in the left circuit breaker room; the vertical busbar leads to the right as a branch line for the molded case circuit breaker, providing current to the plug-in molded case circuit breaker in the right circuit breaker room.

[0018] The plug-in molded case circuit breaker in the left circuit breaker compartment leads out a branch line to the left, which passes through the branch line seat fixed on the left rear cover plate and is connected to the external cable on the left side; the plug-in molded case circuit breaker in the right circuit breaker compartment leads out a branch line to the right, which passes through the branch line seat fixed on the right rear cover plate and is connected to the external cable on the right side.

[0019] The outgoing terminal is a through-type structure, with the outgoing branch passing through the outgoing terminal. One end of the outgoing branch is connected to the plug-in molded case circuit breaker, and the other end is connected to the external cable.

[0020] A left vertical N-row is provided on the left side of the primary cable compartment, and a right vertical N-row is provided on the right side of the primary cable compartment. The left and right vertical N-rows are supported by insulators. The left and right vertical N-rows are distributed with several circular holes of modular spacing. The external cables are introduced from the left and right sides of the rear bottom plate at the rear of the cabinet, and the phase wire and N wire of equal length are cut for connection, which facilitates installation and construction.

[0021] The rear base plate is a modular and detachable structure, consisting of two plates that can be disassembled individually. Circular holes are provided on the plates on the left and right sides of the rear base plate to engage with the tower-shaped sealing ring.

[0022] This utility model has the following advantages:

[0023] The layout employs a top-to-bottom layered design, with each layer featuring two outgoing circuits (left and right) to increase the number of outgoing lines per low-voltage switchgear unit. Each outgoing circuit component is installed in an independent bay, preventing personnel from touching live parts during operation, limiting the impact of faults, and improving equipment safety. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0025] Figure 2 for Figure 1 Schematic diagram of the side section;

[0026] Figure 3 for Figure 1 Rear view;

[0027] Figure 4 for Figure 1 AA section view;

[0028] Marked in the image:

[0029] 1-Left panel, 2-Operating handle, 3-Indicator light, 4-Instrument, 5-Top cover, 6-Top cover side through hole, 7-Right panel, 8-Horizontal grounding bar, 9-External cable, 10-Cabinet, 11-Right side vertical N-row, 12-Primary cable compartment, 13-Busbar compartment partition, 14-Main busbar compartment, 15-Control cable compartment, 16-Functional unit rear compartment, 17-Circuit breaker mounting plate, 18- 19-Right rear cover plate, 20-Outgoing line seat, 21-Insulator, 22-Vertical busbar side plate, 23-Vertical busbar, 24-Vertical busbar compartment, 25-Main busbar clamp, 26-Main busbar, 27-Connecting row, 28-Left vertical N row; 29-Left rear cover plate, 30-Vertical busbar clamp, 31-Vertical busbar cover plate, 32-Observation window, 33-Rotating shaft, 34-Circuit breaker operating mechanism, 35-Plug-in molded case circuit breaker, 36-Current transformer, 37-Molded case circuit breaker incoming line branch, 38-Outgoing line branch, 39-Right circuit breaker compartment, 40-Circuit breaker compartment partition, 41-Left circuit breaker compartment, 42-Rear bottom plate, 43-Tower-shaped sealing ring. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0031] like Figures 1-4 As shown, a fixed-partition low-voltage switchgear with multiple bays and multiple outgoing lines includes a cabinet 10, which contains a primary cable compartment 12, a main busbar compartment 14, a control cable compartment 15, a functional unit rear compartment 16, a vertical busbar compartment 24, a right circuit breaker compartment 39, and a left circuit breaker compartment 41.

[0032] The primary cable compartment 12 is located at the lower rear part of the cabinet 10, and the main busbar compartment 14 is located at the upper rear part of the cabinet 10. The primary cable compartment 12 and the main busbar compartment 14 are separated by the busbar compartment partition 13. The main busbar compartment 14 is used for the through connection of the main busbar 26, and the primary cable compartment 12 is used for the connection of the external cable 9.

[0033] The vertical busbar compartment 24 is located in the middle of the cabinet 10 and in front of the primary cable compartment 12. It is equidistant from the left and right sides of the cabinet 10. The vertical busbar compartment 24 runs through the primary cable compartment 12 from top to bottom. A vertical busbar 23 is arranged in the vertical busbar compartment 24 to distribute current to the power distribution circuits of each layer.

[0034] The control cable compartment 15 is located at the upper front part of the cabinet 10 and is used for the connection of control cables between the low-voltage switchgear. The functional unit rear compartment 16, the right circuit breaker compartment 39, and the left circuit breaker compartment 41 are located at the front of the cabinet 10 and are arranged in layers from top to bottom for installing circuit components.

[0035] The main busbar compartment 14 includes a main busbar 26 and a main busbar clamp 25. The main busbar 26 is used for the transmission of the main current of the system after the cabinet is assembled, while the main busbar clamp 25 supports the main busbar 26 and is installed on the upper side of the cabinet 10. The upper part of the main busbar compartment 14 is a top cover 5, which is a protruding structure. The top surface of the protruding structure is closed without openings, and the side of the protruding structure has a top cover side through hole 6. The protruding structure is used to collect the hot air generated in the cabinet 10 during the operation of this utility model, and the hot air dissipates heat outward through the top cover side through hole 6; in addition, the top surface of the protruding structure can also prevent external moisture from entering.

[0036] The vertical busbar compartment 24 is an enclosed space formed by the vertical busbar side plate 22 and the vertical busbar cover plate 31. This enclosed space protects the vertical busbar 23 and the vertical busbar clamp 30, preventing foreign objects from contacting the vertical busbar 23 and causing a short circuit. An observation window 32 is provided on the vertical busbar cover plate 31 to observe the operating status of the vertical busbar 23.

[0037] The upper end of the vertical busbar 23 is connected to the main busbar 26 through the connecting bar 27 to introduce the main busbar current into the cabinet 10. The vertical busbar 23 is located in the middle of the cabinet 10 and runs through the cabinet 10 from top to bottom. Then, the molded case circuit breaker incoming line branch bar 37 is led out to the left and right sides.

[0038] The cabinet 10 is provided with a circuit breaker mounting plate 17, a layer partition plate 18, a circuit breaker compartment partition plate 40, a left panel 1, a right panel 7, a right rear sealing plate 19, and a left rear sealing plate 29; the circuit breaker mounting plate 17, the layer partition plate 18, the circuit breaker compartment partition plate 40, and the left panel 1 form a left circuit breaker compartment 41; the circuit breaker mounting plate 17, the layer partition plate 18, the circuit breaker compartment partition plate 40, and the right panel 7 form a right circuit breaker compartment 39; the circuit breaker mounting plate 17, the layer partition plate 18, the right rear sealing plate 19, and the left rear sealing plate 29 form a functional unit rear chamber 16.

[0039] A plug-in molded case circuit breaker 35 is installed on the circuit breaker mounting plate 17, and the plug-in molded case circuit breaker 35 is located in the left circuit breaker compartment 41 or the right circuit breaker compartment 39. A current transformer 36, a molded case circuit breaker incoming branch 37, and an outgoing branch 38 are installed in the rear compartment 16 of the functional unit, with the current transformer 36 mounted on the molded case circuit breaker incoming branch 37. Therefore, the plug-in molded case circuit breakers 35, current transformers 36, molded case circuit breaker incoming branch 37, and outgoing branch 38 in different compartments are isolated from each other. When an electrical fault occurs, it will not affect the normal operation of components in adjacent compartments, thus improving the overall operational safety performance.

[0040] The plug-in molded case circuit breaker 35 is equipped with a circuit breaker operating mechanism 34. An operating handle 2, indicator light 3, and instrument 4 are mounted on the left panel 1 and right panel 7. A rotating shaft 33 is connected between the operating mechanism 34 and the operating handle 2, with one end of the shaft inserted into the operating mechanism 34 and the other end inserted into the operating handle 2. Rotating the operating handle 2 activates the circuit breaker operating mechanism 34, which in turn causes the plug-in molded case circuit breaker 35 to open or close. When the operating handle 2 is in the closed position, the rotating shaft 33 hooks onto the operating handle 2, thereby locking the left panel 1 or right panel 7, preventing operators from touching live parts in the left circuit breaker compartment 41 or right circuit breaker compartment 39, ensuring safety. Furthermore, when the plug-in molded case circuit breaker 35 malfunctions, simply open the left panel 1 or right panel 7 and pull out the circuit breaker body for repair or replacement. Because of the separation provided by the circuit breaker mounting plate 17, operators will not touch the live parts of the functional unit rear chamber 16.

[0041] The vertical busbar 23 is located in the middle of the cabinet 10. The vertical busbar 23 leads to the left of the molded case circuit breaker incoming line branch 37 to provide current to the plug-in molded case circuit breaker 35 in the left circuit breaker compartment 41; the vertical busbar 23 leads to the right of the molded case circuit breaker incoming line branch 37 to provide current to the plug-in molded case circuit breaker 35 in the right circuit breaker compartment 39.

[0042] The plug-in molded case circuit breaker 35 in the left circuit breaker compartment 41 leads out a branch line 38 to the left. The branch line 38 passes through the outlet seat 20 fixed on the left rear cover plate 29 and is connected to the external cable 9 on the left. The plug-in molded case circuit breaker 35 in the right circuit breaker compartment 39 leads out a branch line 38 to the right. The branch line 38 passes through the outlet seat 20 fixed on the right rear cover plate 19 and is connected to the external cable 9 on the right.

[0043] The outgoing terminal block 20 has a through-type structure, with the outgoing branch 38 passing through it. One end of the outgoing branch 38 is connected to the plug-in molded case circuit breaker 35, and the other end is connected to the external cable 9. Due to the isolation effect of the left rear sealing plate 29 and the right rear sealing plate 19, operators will not be able to touch the components of the functional unit rear chamber 16 in the primary cable compartment 12, thereby enhancing the safety performance of the low-voltage switchgear.

[0044] A left vertical N-row 28 is provided on the left side of the primary cable compartment 12, and a right vertical N-row 11 is provided on the right side of the primary cable compartment 12. The left vertical N-row 28 and the right vertical N-row 11 are supported by insulators 21. The left vertical N-row 28 and the right vertical N-row 11 are distributed with several circular holes of modular spacing. The external cable 9 is introduced from the left and right sides of the rear bottom plate 42 at the rear of the cabinet 10, and the phase wire and N wire of equal length are cut for connection, which facilitates installation and construction.

[0045] The rear base plate 42 is a modular and detachable structure, composed of two plates that can be disassembled individually. Circular holes are provided on the plates on both sides of the rear base plate 42 to engage the tower-shaped sealing ring 43. During installation, the tower-shaped sealing ring 43 has holes of the appropriate size cut according to the specifications of the external cable 9, allowing the cable to pass smoothly through it. Simultaneously, the tower-shaped sealing ring 43 seals the gap through which the cable passes, thus preventing the low-voltage switchgear from being exposed to moisture from the cable trench and the intrusion of small animals.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines, characterized in that: It includes a cabinet (10), which contains a primary cable compartment (12), a main busbar compartment (14), a control cable compartment (15), a functional unit rear compartment (16), a vertical busbar compartment (24), a right circuit breaker compartment (39), and a left circuit breaker compartment (41). The primary cable compartment (12) is located at the lower rear of the cabinet (10), and the main busbar compartment (14) is located at the upper rear of the cabinet (10). The primary cable compartment (12) and the main busbar compartment (14) are separated by a busbar compartment partition (13). The main busbar compartment (14) is used for the main busbar (26) to pass through and connect, and the primary cable compartment (12) is used for the connection of external cables (9). The vertical busbar compartment (24) is located in the middle of the cabinet (10) and in front of the primary cable compartment (12), with equal distances to the left and right sides of the cabinet (10). The vertical busbar compartment (24) runs through the primary cable compartment (12) from top to bottom. A vertical busbar (23) is arranged in the vertical busbar compartment (24) to distribute current to each layer of power distribution circuit. The control cable compartment (15) is located at the upper front part of the cabinet (10) and is used for the connection of control cables between the low-voltage switchgear. The aforementioned functional unit rear chamber (16), right circuit breaker chamber (39), and left circuit breaker chamber (41) are located at the front of the cabinet (10) and are arranged in layers from top to bottom for installing circuit components; The cabinet (10) is provided with a circuit breaker mounting plate (17), a layer partition plate (18), a circuit breaker compartment partition plate (40), a left panel (1), a right panel (7), a right rear sealing plate (19), and a left rear sealing plate (29); the circuit breaker mounting plate (17), the layer partition plate (18), the circuit breaker compartment partition plate (40), and the left panel (1) form a left circuit breaker compartment (41); the circuit breaker mounting plate (17), the layer partition plate (18), the circuit breaker compartment partition plate (40), and the right panel (7) form a right circuit breaker compartment (39); the circuit breaker mounting plate (17), the layer partition plate (18), the right rear sealing plate (19), and the left rear sealing plate (29) form a functional unit rear chamber (16); A plug-in molded case circuit breaker (35) is installed on the circuit breaker mounting plate (17). The plug-in molded case circuit breaker (35) is located in the left circuit breaker compartment (41) or the right circuit breaker compartment (39). A current transformer (36), a molded case circuit breaker incoming branch (37) and an outgoing branch (38) are provided in the rear compartment (16) of the functional unit. The current transformer (36) is mounted on the molded case circuit breaker incoming branch (37). The plug-in molded case circuit breaker (35) is provided with a circuit breaker operating mechanism (34). The left panel (1) and right panel (7) are equipped with an operating handle (2), an indicator light (3), and an instrument (4). A rotating shaft (33) is provided between the plug-in circuit breaker operating mechanism (34) and the operating handle (2). One end of the rotating shaft (33) is inserted into the circuit breaker operating mechanism (34), and the other end is inserted into the operating handle (2).

2. The fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines according to claim 1, characterized in that: The main busbar compartment (14) includes a main busbar (26) and a main busbar clamp (25). The main busbar (26) is used for the transmission of the main current of the system after the cabinet is assembled, while the main busbar clamp (25) supports the main busbar (26) and is installed on the upper side of the cabinet (10). The upper part of the main busbar compartment (14) is a top cover (5). The top cover (5) is a protruding structure. The top surface of the protruding structure is closed without openings, and the side of the protruding structure is provided with a top cover side through hole (6).

3. A fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines according to claim 2, characterized in that: The vertical busbar compartment (24) is a closed space formed by the vertical busbar side plate (22) and the vertical busbar cover plate (31).

4. A fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines according to claim 3, characterized in that: The upper end of the vertical busbar (23) is connected to the main busbar (26) through the connecting bar (27) to introduce the main busbar current into the cabinet (10). The vertical busbar (23) is located in the middle of the cabinet (10) and runs through the cabinet (10) from top to bottom, and then leads out the molded case circuit breaker incoming line branch (37) to the left and right sides.

5. A fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines according to claim 4, characterized in that: The vertical busbar (23) is located in the middle of the cabinet (10). The vertical busbar (23) leads to the left through the molded case circuit breaker incoming line branch (37) to provide current to the plug-in molded case circuit breaker (35) in the left circuit breaker compartment (41); the vertical busbar (23) leads to the right through the molded case circuit breaker incoming line branch (37) to provide current to the plug-in molded case circuit breaker (35) in the right circuit breaker compartment (39). The plug-in molded case circuit breaker (35) in the left circuit breaker compartment (41) leads out a branch line (38) to the left. The branch line (38) passes through the outlet seat (20) fixed on the left rear cover plate (29) and is connected to the external cable (9) on the left. The plug-in molded case circuit breaker (35) in the right circuit breaker compartment (39) leads out a branch line (38) to the right. The branch line (38) passes through the outlet seat (20) fixed on the right rear cover plate (19) and is connected to the external cable (9) on the right.

6. A fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines according to claim 5, characterized in that: The outlet base (20) has a through-type structure, and the outlet branch (38) passes through the outlet base (20). One end of the outlet branch (38) is connected to the plug-in molded case circuit breaker (35), and the other end is connected to the external cable (9).

7. A fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines according to claim 6, characterized in that: A left vertical N-row (28) is provided on the left side of the primary cable compartment (12), and a right vertical N-row (11) is provided on the right side of the primary cable compartment (12). The left vertical N-row (28) and the right vertical N-row (11) are supported by insulators (21). The left vertical N-row (28) and the right vertical N-row (11) are distributed with several round holes of modular spacing. The external cable (9) is introduced from the left and right sides of the rear bottom plate (42) at the rear of the cabinet (10), and the phase wire and N wire of equal length are cut for connection, which is convenient for installation and construction.

8. The fixed-separation low-voltage switchgear with multiple bays and multiple outgoing lines according to claim 7, characterized in that: The rear base plate (42) is a combined detachable structure. The rear base plate (42) is composed of two plates and the plates can be detached individually. The plates on the left and right sides of the rear base plate (42) are provided with round holes to engage the tower-shaped sealing ring (43).

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