kilovolt-level compact power supply cabinet

Abstract

This utility model relates to the field of power distribution cabinet technology and discloses a compact kilovolt-level power distribution cabinet, comprising: a power distribution cabinet body, an mounting plate installed in the inner cavity of the power distribution cabinet body, a shelf installed on one side of the mounting plate, a vacuum circuit breaker at the top of the shelf, and a second circuit breaker located below the shelf at the bottom of the inner cavity of the power distribution cabinet body; relay compartments located above the vacuum circuit breaker and the second circuit breaker are respectively located on the upper and lower sides of the power distribution cabinet body. By incorporating the vacuum circuit breaker and the second circuit breaker within the inner cavity of the power distribution cabinet body, and with the vacuum circuit breaker and the second circuit breaker vertically distributed, a double-layer handcart design enables a single cabinet to have dual-circuit outgoing lines, supporting two cable outgoing lines. In situations where the space in the power distribution facility installation area is limited, and without changing the size of existing high-voltage distribution cabinets, it is convenient to add functions within the power distribution cabinet body, improve space utilization, and enhance the practicality of this power distribution cabinet.

Description

Technical Field

[0001] This utility model relates to the field of power supply cabinet technology, specifically a kilovolt-level compact power supply cabinet. Background Technology

[0002] In the field of medium and high voltage power systems, feeder cabinets, as key power transmission and control equipment, have always kept pace with the changing needs of the power industry in terms of technological development. Traditional feeder cabinets mostly adopt a single-layer handcart structure, and a single cabinet can only support a single circuit outgoing line. This has exposed many limitations when facing increasingly complex power consumption scenarios and ever-growing power demands.

[0003] From a space utilization perspective, single-layer switchgear designs occupy a large area, making them unsuitable for locations with limited land resources and strict restrictions on equipment installation space, such as urban substations and compact distribution rooms in industrial enterprises, where efficient space utilization is required. Furthermore, they lack functional flexibility. When multiple circuits need to be supplied, the only solution is to increase the number of cabinets, which not only multiplies equipment investment costs but also complicates the layout of the power distribution system, hindering later maintenance and management. In addition, traditional switchgear often requires a complete power outage for repairs in the event of a sudden failure, severely impacting the continuity of power supply. Utility Model Content

[0004] The purpose of this invention is to provide a kilovolt-level compact power supply cabinet to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a kilovolt-level compact power supply cabinet, comprising:

[0006] A power supply cabinet has an installation plate installed in its inner cavity. A shelf is installed on one side of the installation plate. A vacuum circuit breaker is installed on the top of the shelf. A second circuit breaker located below the shelf is installed at the bottom of the inner cavity of the power supply cabinet.

[0007] The upper and lower sides of the power supply cabinet are respectively provided with relay chambers located above the vacuum circuit breaker and the second circuit breaker. The contacts on the vacuum circuit breaker and the second circuit breaker pass through the mounting plate and are connected to the busbar. The contacts on the second circuit breaker are connected to a grounding switch. The bottom of the grounding switch is installed at the bottom of the internal cavity of the power supply cabinet and is located on the side of the mounting plate away from the shelf. A cable bracket is installed on one side of the internal cavity of the power supply cabinet.

[0008] The beneficial effects of adopting the above technical solution are as follows: the vacuum circuit breaker and the second circuit breaker are installed in the inner cavity of the power distribution cabinet, and the vacuum circuit breaker and the second circuit breaker are vertically distributed between them. The double-layer handcart design realizes the function of dual-circuit outgoing line in a single cabinet, supporting two cable outgoing lines. Under the premise that the space in the power distribution facility installation area is limited, and the size of the existing high-voltage distribution cabinet remains unchanged, it is easy to add functions in the power distribution cabinet, improve the space utilization rate, and provide the practicality of this power distribution cabinet.

[0009] As a further improvement of this utility model, the busbar is fully insulated with epoxy resin casting, and the busbar is arranged in a double-layer vertical configuration.

[0010] The beneficial effects of adopting the above technical solution are: the busbars are fully insulated with epoxy resin, the busbars are arranged in a double-layer vertical manner to reduce the lateral space occupation, and the branch busbars are designed with a cross-section of 1250A to meet the current carrying requirements of dual circuits.

[0011] As a further improvement of this utility model, the connection between the busbars adopts a right-angle transition busbar.

[0012] The beneficial effect of adopting the above technical solution is that right-angle transition bars are used only when connecting busbars, reducing the impact of bending radius on the layout.

[0013] As a further improvement of this utility model, the number of cable brackets is two, and the two cable brackets are distributed on the lower side of one side of the power supply cabinet.

[0014] The beneficial effect of adopting the above technical solution is that two cable brackets are provided in the inner cavity of the power supply cabinet, which facilitates the support of multiple cables.

[0015] As a further improvement of this utility model, a control instrument is provided on the front side of the relay room, and front cabinet doors are hinged on both the upper and lower sides of the front side of the power supply cabinet, with the control instrument protruding from the front side of the front cabinet door.

[0016] The beneficial effects of adopting the above technical solution are: the front cabinet is equipped with a front cabinet door on the front side of the power supply cabinet, which allows the vacuum circuit breaker and the second circuit breaker to be operated separately.

[0017] As a further improvement of this utility model, the upper and lower sides of the rear side of the power supply cabinet are hinged with rear cabinet doors, and a heat dissipation vent is provided below the rear cabinet doors.

[0018] The beneficial effect of adopting the above technical solution is that the heat dissipation vents on the rear cabinet door achieve the effect of heat dissipation.

[0019] As a further improvement of this utility model, the rear cabinet doors are all connected to the power supply cabinet using electromagnetic locks, and the electromagnetic locks are linked to the grounding switch signal.

[0020] The beneficial effects of adopting the above technical solution are: the two rear cabinet doors are connected to the power supply cabinet via electromagnetic locks and are linked to the grounding switch signal to ensure operational safety.

[0021] As a further improvement of this utility model, a cabinet top box is installed on the top of the power supply cabinet, an axial flow fan is installed on the top of the cabinet top box, and a flow guide baffle is installed at the bottom of the inner cavity of the cabinet top box.

[0022] The beneficial effect of adopting the above technical solution is that by setting up an axial flow fan and a flow guide baffle, it is convenient to carry out heat dissipation treatment on the internal structure of the power supply cabinet. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the kilovolt-level compact power supply cabinet of this utility model;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the kilovolt-level compact power supply cabinet of this utility model.

[0026] Figure 3 This is a rear view structural diagram of the kilovolt-level compact power supply cabinet of this utility model.

[0027] In the diagram: 1. Power supply cabinet; 2. Mounting plate; 3. Shelf; 4. Relay compartment; 5. Vacuum circuit breaker; 6. Second circuit breaker; 7. Grounding switch; 8. Axial flow fan; 9. Cabinet top box; 10. Cable bracket; 11. Busbar; 12. Front cabinet door; 13. Control instruments; 14. Rear cabinet door; 15. Electromagnetic lock; 16. Heat dissipation vent; 17. Flow guide baffle. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-3 This utility model provides a kilovolt-level compact power supply cabinet, comprising:

[0030] The power supply cabinet 1 has an installation plate 2 installed in its inner cavity. A shelf 3 is installed on one side of the installation plate 2. A vacuum circuit breaker 5 is installed on the top of the shelf 3. A second circuit breaker 6 located below the shelf 3 is installed at the bottom of the inner cavity of the power supply cabinet 1.

[0031] The upper and lower sides of the power supply cabinet 1 are respectively equipped with relay compartments 4 located above the vacuum circuit breaker 5 and the second circuit breaker 6. The contacts of the vacuum circuit breaker 5 and the second circuit breaker 6 pass through the mounting plate 2 and are connected to the busbar 11. The contacts of the second circuit breaker 6 are connected to a grounding switch 7. The bottom of the grounding switch 7 is installed at the bottom of the inner cavity of the power supply cabinet 1 and is located on the side of the mounting plate 2 away from the shelf 3. A cable bracket 10 is installed on one side of the inner cavity of the power supply cabinet 1. The vacuum circuit breaker 5 adopts an ABB VD4 vacuum circuit breaker with a rated current of 1250A and a short-circuit breaking capacity of 25kA, ensuring compliance with national standards such as GB 3906 and DL / T 404 and international standard IEC 62271. It features a modular operating mechanism, supports electric operation and manual energy storage, and is equipped with anti-pumping function and interlocking device as standard.

[0032] The beneficial effects of adopting the above technical solution are as follows: the vacuum circuit breaker 5 and the second circuit breaker 6 are installed in the inner cavity of the power distribution cabinet 1, and the vacuum circuit breaker 5 and the second circuit breaker 6 are vertically distributed between them. The double-layer handcart design realizes the function of dual-circuit outgoing line in a single cabinet, supporting two cable outgoing lines. Under the premise that the space in the power distribution facility installation area is limited, and the size of the existing high-voltage distribution cabinet remains unchanged, it is easy to add functions in the power distribution cabinet 1, improve the space utilization rate, and provide the practicality of this power distribution cabinet.

[0033] The insulation material used inside the power supply cabinet 1 has been upgraded to nano-modified epoxy resin, reducing the safety clearance inside the cabinet by 15%, and passing the power frequency withstand voltage test of 42kV and the lightning impulse test of 75kV. The top of the power supply cabinet 1 has a reserved multi-functional expansion slot to support the installation of wireless temperature sensors, which can be integrated into the circuit breaker contacts or edge computing modules.

[0034] In one embodiment of this utility model, the busbar 11 is fully insulated with epoxy resin casting, and the busbar 11 is arranged in a double-layer vertical configuration.

[0035] The beneficial effects of adopting the above technical solution are: the busbar 11 is fully insulated by epoxy resin casting, the busbar 11 is arranged in a double layer vertically to reduce the lateral space occupation, and the branch busbar cross section is designed according to 1250A to meet the current carrying requirements of dual circuits.

[0036] In one embodiment of this utility model, the connection between busbars 11 adopts a right-angle transition busbar.

[0037] The beneficial effect of adopting the above technical solution is that right-angle transition bars are used only when connecting the busbars 11, which reduces the impact of bending radius on the layout.

[0038] In one embodiment of this utility model, there are two cable supports 10, which are distributed on the lower side of one side of the power supply cabinet 1. The cable supports 10 are equipped with insulating sleeves, conforming to the GB / T 12706 cable laying specification. A removable sealing plate is added to the bottom of the inner cavity of the power supply cabinet 1, located below the cable supports 10, to facilitate future maintenance and capacity expansion.

[0039] The beneficial effect of adopting the above technical solution is that two cable brackets 10 are provided in the inner cavity of the power supply cabinet 1, which facilitates the support of multiple cables.

[0040] In one embodiment of this utility model, a control instrument 13 is provided on the front side of the relay room 4, and a front cabinet door 12 is hinged to both the upper and lower sides of the front side of the power supply cabinet 1, with the control instrument 13 protruding from the front side of the front cabinet door 12.

[0041] The beneficial effects of adopting the above technical solution are: the front cabinet door 12 is provided on the front side of the power supply cabinet 1, which allows the vacuum circuit breaker 5 and the second circuit circuit breaker 6 to be operated respectively.

[0042] In one embodiment of this utility model, a rear cabinet door 14 is hinged to both the upper and lower sides of the rear side of the power supply cabinet 1, and a heat dissipation vent 16 is provided below the rear cabinet door 14.

[0043] The beneficial effect of adopting the above technical solution is that the heat dissipation vent 16 provided on the rear cabinet door 14 achieves the effect of heat dissipation.

[0044] In one embodiment of this utility model, the rear cabinet door 14 is connected to the power supply cabinet 1 by an electromagnetic lock 15, and the electromagnetic lock 15 is signal-linked to the grounding switch 7.

[0045] The beneficial effects of adopting the above technical solution are: the two rear cabinet doors 14 are connected to the power supply cabinet 1 by electromagnetic locks 15 and are linked with the grounding switch 7 to ensure operational safety.

[0046] In one embodiment of this utility model, a cabinet top box 9 is installed on the top of the power supply cabinet 1, an axial flow fan 8 is installed on the top of the cabinet top box 9, and a flow guide baffle 17 is installed at the bottom of the inner cavity of the cabinet top box 9.

[0047] The beneficial effect of adopting the above technical solution is that by setting the axial flow fan 8 and the flow guide baffle 17, it is convenient to carry out heat dissipation treatment on the internal structure of the power supply cabinet 1.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A kilovolt-level compact feeder cabinet, characterized in that, include: A power supply cabinet has an installation plate installed in its inner cavity. A shelf is installed on one side of the installation plate. A vacuum circuit breaker is installed on the top of the shelf. A second circuit breaker located below the shelf is installed at the bottom of the inner cavity of the power supply cabinet. The upper and lower sides of the power supply cabinet are respectively provided with relay chambers located above the vacuum circuit breaker and the second circuit breaker. The contacts on the vacuum circuit breaker and the second circuit breaker pass through the mounting plate and are connected to the busbar. The contacts on the second circuit breaker are connected to a grounding switch. The bottom of the grounding switch is installed at the bottom of the internal cavity of the power supply cabinet and is located on the side of the mounting plate away from the shelf. A cable bracket is installed on one side of the internal cavity of the power supply cabinet.

2. The kilovolt-level compact feeder cabinet according to claim 1, characterized in that, The busbar is fully insulated with epoxy resin casting and is arranged in a double-layer vertical configuration.

3. The kilovolt-level compact feeder cabinet according to claim 1, characterized in that, Right-angle adapters are used for connections between the busbars.

4. The kilovolt-level compact feeder cabinet according to claim 1, characterized in that, The number of cable brackets is two, and the two cable brackets are distributed on the lower side of one side of the power supply cabinet.

5. The kilovolt-level compact feeder cabinet according to claim 1, characterized in that, The relay room is equipped with control instruments on the front side. The front cabinet is hinged with front cabinet doors on both the upper and lower sides, and the control instruments protrude from the front of the front cabinet doors.

6. The kilovolt-level compact feeder cabinet according to claim 1, characterized in that, The power supply cabinet has rear cabinet doors hinged to both the upper and lower rear sides, and a heat dissipation vent is provided at the bottom of the rear cabinet doors.

7. The kilovolt-level compact feeder cabinet according to claim 6, characterized in that, The rear cabinet doors are all connected to the power supply cabinet using electromagnetic locks, and the electromagnetic locks are linked to the grounding switch signal.

8. The kilovolt-level compact feeder cabinet according to claim 1, characterized in that, The top of the power supply cabinet is equipped with a cabinet top box, the top of the cabinet top box is equipped with an axial flow fan, and the bottom of the inner cavity of the cabinet top box is equipped with a flow guide baffle.

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