10kv enclosed high-voltage contactor cabinet structure

Abstract

The utility model provides a 10 kv closed type high-voltage contactor cabinet structure, a high-voltage cabinet comprises a lower cabinet body, an upper instrument cabinet and a middle wiring cabinet, a contactor comprises a handcart type contactor seat, contact boxes and a fusible core, the handcart type contactor seat is arranged at the front side of the middle wiring cabinet, two groups of contact boxes are arranged at the inner side of the handcart type contactor seat in an up-and-down parallel manner, and the fusible core is arranged at the front side of the middle wiring cabinet. The upper end of the handcart type contactor seat is connected with the interior of the upper instrument cabinet through the terminal support, the contact box is connected with the electric wave mutual inductor and the plug sleeve through the connecting bus, the lower portion of the electric wave mutual inductor is provided with the grounding bus, and the lower end of the grounding bus is arranged in the lower cabinet body. The handcart-type contactor is simple in structure and good in corrosion resistance, modularization arrangement is adopted, standardization, serialization and modularization of the device are achieved, the handcart-type contactor can be conveniently replaced according to the actual operation condition and operation area of the high-voltage cabinet, and capacity expansion by a user is facilitated.

Description

Technical Field

[0001] This article belongs to the technical field of high-voltage contactor cabinets, and specifically relates to the structure of a 10kV enclosed high-voltage contactor cabinet. Background Art

[0002] Traditional cabinet-type reactive power compensation devices use cabinets made of cold-rolled steel plates. Shunt capacitors, fuses, and reactors are connected in series and installed inside the cabinet (some even without series reactors). They are directly installed on the secondary side of the transformer and are connected in parallel with the load.

[0003] Traditional reactive power compensation devices have the following disadvantages:

[0004] For traditional cabinet-type reactive power compensation devices, the cabinet shell is made of cold-rolled steel plates and undergoes spray painting treatment, resulting in low anti-corrosion performance. In places with high humidity and high pollution levels, the spray paint layer often peels off and the shell rusts after a short service life, seriously affecting the service life of the product. The protection of traditional cabinet-type reactive power compensation devices is not perfect and the reliability is poor. For traditional cabinet-type automatic switching high-voltage reactive power compensation devices, there are only overcurrent, overvoltage, undervoltage, and open delta protections. The quick-break protection relies on the protection of the upper-level switch, and there is no quick-break protection or harmonic protection inside the device. Therefore, the protection reliability is not high. Traditional cabinet-type reactive power compensation devices have poor serialization and standardization capabilities in the industry, and the structure of the device varies depending on the capacity, making it difficult to form a standardized series. Traditional cabinet-type reactive power compensation devices lack intelligence, have no relevant communication and monitoring interfaces, and cannot meet the intelligent requirements of "remote control, remote signaling, remote measurement, and remote adjustment". For traditional cabinet-type reactive power compensation devices, the bus connection form between single groups relies on insulators to hang the bus for connection, and the enclosure of the cabinet is relatively poor, resulting in a low IP protection level for traditional cabinet-type reactive power compensation devices. Content of the Utility Model

[0005] To solve the above problems, this paper proposes a structure of a 10kv enclosed high-voltage contactor cabinet. The high-voltage cabinet includes a lower cabinet body, an upper instrument cabinet, and a middle wire-walking cabinet. A contactor is provided inside the middle wire-walking cabinet. The contactor is connected to a plug-in bushing through a connecting bus. The contactor is a trolley-type contactor, which includes a trolley-type contactor seat, a contact head box, and a fuse core. The trolley-type contactor seat is arranged on the front side of the middle wire-walking cabinet. Two groups of contact head boxes are arranged in parallel up and down on the inner side of the trolley-type contactor seat. The upper end of the trolley-type contactor seat is connected to the inside of the upper instrument cabinet through a terminal bracket. The contact head box is connected to a radio wave transformer and a plug-in bushing respectively through a connecting bus. A grounding bus is provided below the radio wave transformer. The lower end of the grounding bus is arranged inside the lower cabinet body. The lower end of the grounding bus is connected to a vertical bracket inside the lower cabinet body through a grounding switch. The lower end of the vertical bracket of the lower cabinet body is connected to a cable cover. The design has relatively high reliability and good anti-corrosion performance. It adopts modular layout, realizing the standardization, serialization, and modularization of the device. The trolley-type contactor can be conveniently replaced according to the actual operation conditions and operation areas of the high-voltage cabinet, facilitating users to expand the capacity.

[0006] The cabinet body of the high-voltage cabinet is successively provided with a lower cabinet body, a middle wire-walking cabinet, and an upper instrument cabinet from bottom to top. The upper surface of the lower cabinet body and the lower surface of the middle wire-walking cabinet are conductively connected. The contour shapes of the connection surfaces of the lower cabinet body and the middle wire-walking cabinet are the same. The upper instrument cabinet is embedded at the upper front side of the middle wire-walking cabinet. A plug-in bushing is provided above the rear side inside the middle wire-walking cabinet, and a radio wave transformer is provided below the rear side inside the middle wire-walking cabinet. The mutually independent cabinet bodies can also improve the IP protection level of the device, which can reach IP4X.

[0007] The shape of the trolley-type contactor seat is a horizontal L-shaped seat. An installation push wheel is provided at the bottom of the trolley-type contactor seat. A terminal bracket is provided at the upper end of the vertical plate of the trolley-type contactor seat. Contact head boxes are arranged in a stacked manner up and down between the horizontal plate and the vertical plate of the trolley-type contactor seat. The contact head box is in the shape of a cylindrical shell. Fuse cores are arranged horizontally and parallel to the outside of the contact head box inside the contact head box. One end of the contact head box is a conducting end, and the other end of the contact head box is hermetically connected to the trolley-type contactor seat. The outer sides of the contact head boxes parallel to each other on the upper and lower sides are fixedly connected to each other. The conducting end and the fuse core are conductively connected to each other. The trolley-type contact seat facilitates the installation of the contact seat, improves the installation efficiency, and the contact seat can also be conducted to the upper instrument cabinet through the terminal bracket, enabling convenient and fast control of the contact seat through the instrument cabinet without the need for cabinet disassembly operations.

[0008] There are three groups of plug-in conduits arranged vertically and horizontally at equal distances and perpendicular to each other. All three groups of plug-in conduits are connected to the same end of a contact box through connecting busbars. The radio wave mutual inductor is horizontally arranged at the rear side of the bottom of the middle wire-walking cabinet. The access end of the radio wave mutual inductor is connected to the contact box through a connecting busbar. The ground wire interface of the radio wave mutual inductor is connected with a grounding busbar. The grounding busbar is a right-angled folded-edge busbar. By grounding through the radio wave mutual inductor, convenient overall grounding of the high-voltage cabinet is achieved, simplifying the grounding distance and layout structure, and facilitating production and installation.

[0009] Beneficial effects:

[0010] It has relatively high design reliability and good anti-corrosion performance. It adopts modular layout, realizing the standardization, serialization, and modularization of the device. The handcart-type contactor can be conveniently replaced according to the actual operation conditions and operation area of the high-voltage cabinet, facilitating users to expand capacity.

[0011] The mutually independent cabinet body can also improve the IP protection level of the device, which can reach IP4X.

[0012] The handcart-type contact seat is convenient for the installation of the contact seat, improving the installation efficiency. And the contact seat can also be conducted with the upper instrument cabinet through the terminal bracket, enabling convenient and quick control of the contact seat through the instrument cabinet without the need for cabinet disassembly operations.

[0013] By grounding through the radio wave mutual inductor, convenient overall grounding of the high-voltage cabinet is achieved, simplifying the grounding distance and layout structure, and facilitating production and installation. Description of the drawings

[0014] Figure 1 It is a schematic diagram of the internal structure layout on the side of a 10kv enclosed high-voltage contactor cabinet structure;

[0015] In the figure: 1, lower cabinet body; 2, upper instrument cabinet; 3, middle wire-walking cabinet; 4, handcart-type contactor seat; 5, contact box; 6, fuse core; 7, radio wave mutual inductor; 8, connecting busbar; 9, grounding busbar; 10, plug-in sleeve. Specific implementation manners

[0016] To deepen the understanding of the present utility model, the present utility model will be further described in detail below in combination with embodiments and drawings. The embodiments are only used to explain the present utility model and do not constitute a limitation on the protection scope of the present utility model.

[0017] Lower cabinet body 1, upper instrument cabinet 2, middle wire-walking cabinet 3, handcart-type contactor seat 4, contact box 5, fuse core 6, radio wave mutual inductor 7, connecting busbar 8, grounding busbar 9, plug-in sleeve 10.

[0018] As Figure 1 shown;

[0019] A structure of a 10kV enclosed high-voltage contactor cabinet. The high-voltage cabinet includes a lower cabinet body 1, an upper instrument cabinet 2, and a middle wire-walking cabinet 3. A contactor is provided inside the middle wire-walking cabinet 3. The contactor is connected to a plug-in bushing 10 through a connecting busbar 8. The contactor is a handcart-type contactor, which includes a handcart-type contactor seat 4, a contact box 5, and a fuse core 6. The handcart-type contactor seat 4 is arranged on the front side of the middle wire-walking cabinet 3. Two groups of contact boxes 5 are arranged in parallel up and down inside the handcart-type contactor seat 4. The upper end of the handcart-type contactor seat 4 is connected to the inside of the upper instrument cabinet 2 through a terminal bracket. The contact box 5 is respectively connected to a radio wave transformer 7 and a plug-in bushing 10 through a connecting busbar 8. A grounding busbar 9 is provided below the radio wave transformer 7. The lower end of the grounding busbar 9 is arranged inside the lower cabinet body 1. The lower end of the grounding busbar 9 is connected to a vertical bracket inside the lower cabinet body 1 through a grounding switch. The lower end of the vertical bracket of the lower cabinet body 1 is connected to a cable cover. The cabinet body of the high-voltage cabinet is successively provided with a lower cabinet body 1, a middle wire-walking cabinet 3, and an upper instrument cabinet 2 from bottom to top. The upper surface of the lower cabinet body 1 is conductively connected to the lower surface of the middle wire-walking cabinet 3. The contour shapes of the connection surfaces of the lower cabinet body 1 and the middle wire-walking cabinet 3 are the same. The upper instrument cabinet 2 is embedded in the upper front side of the middle wire-walking cabinet 3. A plug-in bushing 10 is provided above the rear side inside the middle wire-walking cabinet 3. A radio wave transformer 7 is provided below the rear side inside the middle wire-walking cabinet. The shape of the handcart-type contactor seat 4 is a horizontal L-shaped seat. Installation wheels are provided at the bottom of the handcart-type contactor seat 4. A terminal bracket is provided at the upper end of the vertical plate of the handcart-type contactor seat 4. The contact boxes 5 are arranged in a stacked manner up and down between the horizontal plate and the vertical plate of the handcart-type contactor seat 4. The contact box 5 is in the shape of a cylindrical shell. Fuse cores 6 are arranged horizontally and parallel to the outside of the contact box 5 inside the contact box 5. One end of the contact box 5 is a connection end. The other end of the contact box 5 is hermetically connected to the handcart-type contactor seat 4. The outside of the contact boxes 5 on the upper and lower sides are fixedly connected to each other in parallel. The connection end is conductively connected to the fuse core 6. Three groups of plug-in conduits are arranged vertically and horizontally at equal distances and perpendicular to each other. The three groups of plug-in conduits are all connected to the same end of a contact box through a connecting busbar 8. The radio wave transformer 7 is arranged horizontally at the rear side of the bottom of the middle wire-walking cabinet 3. The access end of the radio wave transformer 7 is connected to the contact box through a connecting busbar 8. A grounding busbar 9 is connected to the ground wire interface of the radio wave transformer 7. The grounding busbar 9 is a right-angled folded busbar.

[0020] Implementation example;

[0021] During the assembly process, the draw-out type contactor base 4 is inserted into the inner part of the middle-wiring cabinet 3 from the front end of the middle-wiring cabinet 3 by means of the pushing wheels at the bottom of the draw-out type contactor base 4. The front end of the bottom of the draw-out type contactor base 4 is limited and fixed by a stopper. Then, the corresponding contact boxes 5 are respectively connected through the connecting busbars 8 from the side of the middle-wiring cabinet. The contact boxes 5 are respectively connected to the radio frequency transformers 7 and the plug-in bushings 10. Finally, the terminal brackets at the upper end of the draw-out type contactor base 4 are connected from the front side, and the terminal brackets are connected to the upper instrument cabinet 2, thereby completing the control of the contactor through the upper instrument cabinet 2.

[0022] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Structure of a 10kV enclosed high-voltage contactor cabinet. The high-voltage cabinet includes a lower cabinet body, an upper instrument cabinet, and a middle wire-walking cabinet. A contactor is provided inside the middle wire-walking cabinet, and the contactor is connected to a plug-in bushing through a connecting bus. It is characterized in that, The contactor described is a trolley-type contactor, which includes a trolley-type contactor base, a contact box, and a fuse core. The trolley-type contactor base is provided on the front side of the middle-wiring cabinet. Two groups of contact boxes are provided in parallel up and down on the inner side of the trolley-type contactor base. The upper end of the trolley-type contactor base is connected to the inside of the upper instrument cabinet through a terminal bracket. The contact box is connected to the radio wave transformer and the plugging sleeve respectively through a connecting bus. A grounding bus is provided below the radio wave transformer. The lower end of the grounding bus is provided inside the lower cabinet body. The lower end of the grounding bus is connected to the vertical bracket inside the lower cabinet body through a grounding switch. The lower end of the vertical bracket of the lower cabinet body is connected to the cable cover.

2. The structure of a 10 kV enclosed high-voltage contactor cabinet according to claim 1, characterized in that, The cabinet body of the high-voltage cabinet is successively provided with a lower cabinet body, a middle-wiring cabinet, and an upper instrument cabinet from bottom to top. The upper surface of the lower cabinet body is conductively connected to the lower surface of the middle-wiring cabinet. The contour shapes of the connection surfaces of the lower cabinet body and the middle-wiring cabinet are the same. The upper instrument cabinet is embedded in the upper end of the front side of the middle-wiring cabinet. A plugging sleeve is provided above the rear side inside the middle-wiring cabinet, and a radio wave transformer is provided below the rear side inside the middle-wiring cabinet.

3. The structure of a 10 kV enclosed high-voltage contactor cabinet according to claim 1, characterized in that, The shape of the trolley-type contactor base is a horizontal L-shaped base. Installation push wheels are provided at the bottom of the trolley-type contactor base. A terminal bracket is provided at the upper end of the vertical plate of the trolley-type contactor base. Contact boxes are provided in a stacked manner up and down between the horizontal plate and the vertical plate of the trolley-type contactor base.

4. A structure of a 10 kV enclosed high-voltage contactor cabinet according to claim 1, characterized in that, The contact box is in the shape of a cylindrical shell. Fuse cores are provided horizontally inside the contact box parallel to the outside of the contact box. One end of the contact box is a conducting end, and the other end of the contact box is hermetically connected to the trolley-type contactor base. The outside of the upper and lower parallel contact boxes are fixedly connected to each other. The conducting end is conductively connected to the fuse core.

5. The structure of a 10 kV enclosed high-voltage contactor cabinet according to claim 2, characterized in that, Three groups of plugging sleeves are provided perpendicular to each other horizontally and equidistantly. The three groups of plugging sleeves are all connected to the same end of a contact box through a connecting bus.

6. The structure of a 10kV enclosed high-voltage contactor cabinet according to claim 1, wherein, The radio wave transformer is horizontally provided at the rear side of the bottom of the middle-wiring cabinet. The access end of the radio wave transformer is connected to the contact box through a connecting bus. A grounding bus is connected to the ground wire interface of the radio wave transformer. The grounding bus is a right-angled folded-edge bus bar.

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