Ring main unit

Abstract

The utility model belongs to the technical field of power systems, and discloses a ring main unit, which comprises a cabinet body, a support frame and a communication piece, the support frame is arranged at the top of the cabinet body, the support frame comprises a support body connected with the cabinet body and two fixing pieces arranged on the support body, the two fixing pieces are arranged at intervals along the height direction of the cabinet body, and the communication piece is arranged on the support body. The communication piece is connected with the two fixing pieces. According to the ring main unit provided by the utility model, the supporting frame is arranged on the first top surface, and the communication piece is connected with the two fixing pieces to be fixed on the supporting frame, so that the communication piece is stably fixed on the top of the cabinet body, the occupied area of the ring main unit is effectively reduced, the height of the supporting frame is moderate, the communication piece is convenient to maintain, and the communication piece is convenient to maintain. And the compact structure of the cabinet body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power systems, and particularly relates to a ring main unit. Background Art

[0002] With the development of the power industry, the demand for ring main units in the industry is increasing. However, with the increase in the number of installed ring main units, the demand for floor space is also increasing.

[0003] In the related art, communication components of the ring main unit, such as an optical distribution frame (ODF for short) and a switch, are generally hung on one side of the cabinet body of the ring main unit or placed on the ground, which increases the floor space; or the communication components are concentrated in a box body and the box body is arranged in the cabinet body of the ring main unit. The opening and closing angle of the cabinet door of the ring main unit is too small, which will affect the opening of the box door on the box body and is not conducive to the maintenance of the communication components. Therefore, there is an urgent need for a ring main unit to solve the above technical problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a ring main unit, which can effectively reduce the floor space and facilitate the maintenance of communication components.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Provide a ring main unit, including:

[0007] A cabinet body, the top of the cabinet body is stepped, including a first top surface and a second top surface which are arranged at intervals from bottom to top along the height direction of the cabinet body;

[0008] A support frame, including a support body arranged on the first top surface and two fixing parts arranged on the support body, and the two fixing parts are arranged at intervals along the height direction of the cabinet body;

[0009] A communication component, connected to both of the two fixing parts.

[0010] Optionally, connection ears are arranged on both opposite sides of the communication component along the height direction of the cabinet body, the connection ears and the fixing parts are arranged in one-to-one correspondence, and at least one first fixing hole is arranged on the connection ears;

[0011] A plurality of second fixing holes are arranged at intervals on the fixing parts;

[0012] Among them, along the height direction of the cabinet body, the first fixing hole on the same side and one of the second fixing holes are fixedly connected by bolts.

[0013] Optionally, the first fixing hole is set as an oblong hole, and the first fixing hole extends along the height direction of the cabinet body;

[0014] and / or the second fixing hole is configured as an oblong hole, and the second fixing hole extends along a first direction.

[0015] Optionally, the fixing member includes a plate body, a first plate portion, and a second plate portion that extend along the first direction. The first plate portion is disposed on a first side of the plate body along a second direction, and the second plate portion is disposed on a second side of the plate body along the second direction. The first plate portion and the second plate portion are both perpendicular to the plate body, and the first plate portion and the second plate portion are arranged along the first direction. At least one communication member is respectively provided on the first plate portion and the second plate portion.

[0016] Optionally, the communication member includes an optical fiber distribution frame and a switch. The optical fiber distribution frame is disposed on the first plate portion, and the switch is disposed on the second plate portion.

[0017] Optionally, first positioning holes are provided at both ends of the fixing member along the first direction;

[0018] The bracket body includes two support components corresponding to the fixing member one by one. The support component includes two support members spaced apart along the first direction. A plurality of second positioning holes are spaced apart along the second direction on the support member.

[0019] Wherein, along the first direction, the first positioning hole on the same side and one of the second positioning holes are fixedly connected by a bolt.

[0020] Optionally, third positioning holes are provided at both ends of the support member along the second direction;

[0021] The bracket body further includes two column components spaced apart along the second direction. The column component includes two support columns spaced apart along the first direction. A positioning hole group corresponding to the support member is provided on the support column. The positioning hole group includes at least one fourth positioning hole;

[0022] Wherein, along the second direction, the third positioning hole on the same side and one of the second positioning holes are fixedly connected by a bolt.

[0023] Optionally, a cross beam is connected between two support columns opposite to each other along the first direction.

[0024] Optionally, the cross beam includes a beam body and overlapping portions provided at both ends of the beam body. Both ends of the beam body are respectively abutted against the circumferences of the corresponding support columns, and the overlapping portions are abutted against the tops of the corresponding support columns.

[0025] Optionally, a plurality of mounting holes are provided on at least one of the support columns.

[0026] Advantageous effects:

[0027] For the ring main unit provided by the present utility model, a support frame is arranged on the first top surface, and a communication component is fixed to the support frame by connecting with two fixing components, so that the communication component is stably fixed on the top of the cabinet body, effectively reducing the floor area of the ring main unit, making the height of the support frame moderate, facilitating the maintenance of the communication component, and ensuring the compact structure of the cabinet body. Moreover, the communication component is fixed to the support frame by two fixing components, which is convenient for the installation of the communication component, saves the material of the support frame, and can enhance the structural strength of the support frame, ensuring the stability of the communication component relative to the cabinet body. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the ring main unit provided by the present utility model;

[0029] Figure 2 is a schematic structural diagram of the support frame with a communication component installed thereon provided by the present utility model;

[0030] Figure 3 is a schematic structural diagram of the fixing component provided by the present utility model;

[0031] Figure 4 is a schematic structural diagram of the support frame provided by the present utility model;

[0032] Figure 5 is a partial structural diagram of the support frame provided by the present utility model;

[0033] Figure 6 is another partial structural diagram of the support frame provided by the present utility model.

[0034] In the figure:

[0035] 100, cabinet body; 110, first top surface; 120, second top surface;

[0036] 200, support frame; 210, support frame body; 211, support member; 2111, second positioning hole; 2112, third positioning hole; 2113, support plate; 2114, folded edge; 212, support column; 2121, fourth positioning hole; 2122, mounting hole; 2123, seventh positioning hole; 213, cross beam; 2131, beam main body; 2132, overlapping portion; 2133, fifth positioning hole; 220, fixing component; 2201, second fixing hole; 2202, first positioning hole; 221, plate main body; 222, first plate portion; 223, second plate portion;

[0037] 300, communication component; 301, optical fiber distribution frame; 302, switch; 310, connecting ear; 311, first fixing hole. Detailed Embodiments

[0038] The present utility model will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of convenience in description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0039] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0041] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] Refer to Figures 1 to 6 As shown, this embodiment provides a ring main unit, which includes a cabinet body 100, a support frame 200, and a communication component 300.

[0043] Specifically, the top of the cabinet body 100 is stepped, including a first top surface 110 and a second top surface 120 that are spaced apart from bottom to top along the height direction of the cabinet body 100; the support frame 200 includes a bracket body 210 disposed on the first top surface 110 and two fixing members 220 disposed on the bracket body 210, and the two fixing members 220 are spaced apart along the height direction of the cabinet body 100, and the communication member 300 is connected to both of the two fixing members 220. Wherein, the a direction in the figure is the height direction of the cabinet body 100.

[0044] In this embodiment, the support frame 200 is disposed on the first top surface 110, and the communication member 300 is fixed to the support frame 200 by connecting to the two fixing members 220, so that the communication member 300 is stably fixed on the top of the cabinet body 100, effectively reducing the floor area of the ring main unit, making the height of the support frame 200 moderate, facilitating the maintenance of the communication member 300, and ensuring the compact structure of the cabinet body 100. And the communication member 300 is fixed to the support frame 200 by the two fixing members 220, which is convenient for the installation of the communication member 300, saves the material of the support frame 200, and can enhance the structural strength of the support frame 200, ensuring the stability of the communication member 300 relative to the cabinet body 100 and effectively preventing the support frame 200 from deforming structurally during actual use. In addition, disposing the support frame 200 outside the cabinet body 100 can make full use of the space inside the cabinet body 100, facilitate the installation and arrangement of the electrical components inside the cabinet body 100, and leave extra space for the later transformation and adjustment of the ring main unit.

[0045] In this embodiment, referring to Figures 2 to 4 as shown, the communication member 300 can be connected to the fixing member 220 by means of screw fastening.

[0046] Specifically, connection ears 310 are provided on both opposite sides of the communication member 300 along the height direction of the cabinet body 100, the connection ears 310 and the fixing members 220 are arranged in one-to-one correspondence, and at least one first fixing hole 311 is provided on the connection ears 310; a plurality of second fixing holes 2201 are spaced apart on the fixing members 220. Wherein, along the height direction of the cabinet body 100, the first fixing hole 311 on the same side and one of the second fixing holes 2201 are fixedly connected by bolts, which is convenient for the disassembly and assembly of communication members 300 of various sizes and models, and can make the communication member 300 stably fixed on the support frame 200.

[0047] Exemplarily, the ring main unit may further include a first fastening assembly (not shown) corresponding to the first fixing holes 311 one by one, and the first fastening assembly includes a first fastener and a first screw set, and the first fastener passes through the corresponding first fixing hole 311 and one of the second fixing holes 2201 and is threadedly connected to the first screw set.

[0048] Exemplarily, the two fixing members 220 are symmetrically arranged.

[0049] Exemplarily, the second fixing holes 2201 may be arranged in a matrix, so that the position of the communication component 300 is adjustable in at least one of the height direction and the first direction of the cabinet body 100, and it is suitable for the connection of communication components 300 of various size models, improving the applicability.

[0050] Exemplarily, two first fixing holes 311 are provided on the connecting ear 310 to ensure the stable and reliable installation of the communication component 300.

[0051] Exemplarily, the first fixing holes 311 may be set as waist-shaped holes, and the first fixing holes 311 extend along the height direction of the cabinet body 100, so that the communication component 300 can finely adjust its position relative to the support frame 200 along the height direction of the cabinet body 100, and it is convenient for the first fastener to pass through.

[0052] Exemplarily, the second fixing holes 2201 may be set as waist-shaped holes, and the second fixing holes 2201 extend along the first direction, so that the communication component 300 can finely adjust its position relative to the support frame 200 along the first direction, and it is convenient for the first fastener to pass through. Wherein, the b direction in the figure may be the first direction, and the first direction may be the width direction of the cabinet body 100.

[0053] Exemplarily, the fixing member 220 may be connected with a plurality of communication components 300, that is, a plurality of groups of second fixing holes 2201 are provided on the fixing member 220, and the plurality of groups of second fixing holes 2201 are arranged in one-to-one correspondence with the plurality of communication components 300.

[0054] Of course, the communication component 300 may also be connected to the fixing member 220 by means of clamping, bonding, welding or other connection methods, which are not limited in this application.

[0055] In a feasible implementation manner, the fixing member 220 includes a plate main body 221, a first plate portion 222 and a second plate portion 223 extending along the first direction. The first plate portion 222 is arranged on the first side of the plate main body 221 along the second direction, and the second plate portion 223 is arranged on the second side of the plate main body 221 along the second direction. The first plate portion 222 and the second plate portion 223 are both perpendicular to the plate main body 221, and the first plate portion 222 and the second plate portion 223 are arranged along the first direction, and at least one communication component 300 is provided on each of the first plate portion 222 and the second plate portion 223. Wherein, second fixing holes 2201 are provided on both the first plate portion 222 and the second plate portion 223. Wherein, the c direction in the figure may be the second direction, and the second direction may be the length direction of the cabinet body 100.

[0056] Specifically, the communication component 300 includes an optical fiber distribution frame 301 and a switch 302. The optical fiber distribution frame 301 is arranged on the first plate portion 222, and the switch 302 is arranged on the second plate portion 223 to facilitate the installation of the optical fiber distribution frame 301 and the switch 302. Among them, at least one of the optical fiber distribution frame 301 and the switch 302 is provided. Optionally, two optical fiber distribution frames 301 are provided and one switch 302 is provided. Exemplarily, a group of second fixing holes 2201 arranged in a matrix are provided on the first plate portion 222, and two groups of second fixing holes 2201 arranged in a matrix are provided on the second plate portion 223. Among them, the optical fiber distribution frame 301 is used for the termination and distribution of the central office backbone optical cable in the optical fiber communication system, and can conveniently realize the connection, distribution and scheduling of the optical fiber lines.

[0057] Exemplarily, the fixing member 220 can be formed by bending sheet metal.

[0058] In this embodiment, referring to Figures 4 to 6 As shown, the fixing member 220 can be connected to the bracket body 210 by means of threaded fastening.

[0059] Specifically, first positioning holes 2202 are provided at both ends of the fixing member 220 along the first direction. Specifically, the first positioning holes 2202 are provided on the plate body 221; the bracket body 210 includes two support components corresponding to the fixing member 220 one by one. The support component includes two support members 211 arranged at intervals along the first direction, and a plurality of second positioning holes 2111 are arranged at intervals along the second direction on the support member 211; among them, along the first direction, the first positioning holes 2202 on the same side and one of the second positioning holes 2111 are fixedly connected by bolts, which facilitates the connection of the fixing member 220 relative to the bracket body 210, and the fixing member 220 is connected by two support members 211 to ensure the structural strength of the support frame 200, and the connection is stable and reliable. In addition, a plurality of second positioning holes 2111 are arranged at intervals along the second direction on the support member 211, which can realize the position adjustment of the fixing member 220 relative to the bracket body 210 along the second direction, that is, adjust the position of the communication component 300 along the second direction, improving the applicability.

[0060] Exemplarily, the ring main unit may further include a second fastening component (not shown) corresponding to the first positioning holes 2202 one by one. The second fastening component includes a second fastener and a second screw set. The second fastener passes through the corresponding first positioning hole 2202 and one of the second positioning holes 2111 and is threadedly connected to the second screw set.

[0061] Exemplarily, at least one first positioning hole 2202, for example, two, is provided on both sides of the fixing member 220 along the first direction.

[0062] Exemplarily, the first positioning hole 2202 is a circular through hole.

[0063] Exemplarily, the second positioning hole 2111 may be an oblong hole, so that the fixing member 220 can be finely adjusted in position relative to the bracket body 210 along the second direction, and it is convenient for the second fastener to pass through.

[0064] Of course, the fixing member 220 may also be connected to the bracket body 210 by means of snap connection, bonding, welding or other connection methods.

[0065] In this embodiment, continue to refer to Figures 4 to 6 As shown, the bracket body 210 further includes two column components arranged at intervals along the second direction. Each column component includes two support columns 212 arranged at intervals along the first direction. A support member 211 is respectively arranged between the two support columns 212 in the same group. Among them, the corresponding support member 211 and the support column 212 can be connected by means of threaded fastening.

[0066] Specifically, third positioning holes 2112 are provided at both ends of the support member 211 along the second direction. Positioning hole groups corresponding to the support columns 212 are provided on the support columns 212. The positioning hole groups include at least one fourth positioning hole 2121. Among them, along the second direction, the third positioning hole (2112) on the same side and one of the second positioning holes (2111) are fixedly connected by bolts, which is convenient for the connection between the support member 211 and the support column 212. When the positioning hole group includes a plurality of fourth positioning holes 2121, the position of the support member 211 relative to the support column 212 along the height direction of the cabinet body 100 is adjustable, that is, the distance between the two fixing members 220 is adjustable, so as to be suitable for connecting with the communication member 300 and improve the applicability.

[0067] Exemplarily, the ring main unit may further include a third fastening component (not shown) corresponding to the third positioning hole 2112. The third fastening component includes a third fastener and a third screw kit. The third fastener passes through the corresponding third positioning hole 2112 and one of the fourth positioning holes 2121 and is threadedly connected to the third screw kit.

[0068] Optionally, the positioning hole group corresponding to the upper fixing member 220 is provided with one fourth positioning hole 2121, and the positioning hole group corresponding to the lower fixing member 220 is provided with a plurality of fourth positioning hole groups 2121, for example, three to six.

[0069] Exemplarily, both the third positioning hole 2112 and the fourth positioning hole 2121 may be circular through holes.

[0070] Exemplarily, the support member 211 can be formed by bending sheet metal. Specifically, the support member 211 includes a support plate 2113 and flanges 2114 provided at both ends of the support plate 2113. The second positioning hole 2111 is provided on the support plate 2113, and the third positioning hole 2112 is provided on the flange 2114. Among them, the cross-sectional shape of the support plate 2113 can be L-shaped to ensure the structural strength of the support member 211.

[0071] Exemplarily, the support column 212 can be a channel structure. For example, the cross-sectional shape of the support column 212 is U-shaped to reduce the weight of the support frame 200.

[0072] Of course, the fixing member 220 can also be connected to the bracket body 210 by clamping, bonding, welding or other connection methods.

[0073] In this embodiment, referring to Figure 6 As shown, a cross beam 213 is provided between the two support assemblies to ensure the structural strength of the bracket body 210 and effectively prevent the support frame 200 from deforming structurally during actual use.

[0074] Specifically, a cross beam 213 is connected between the two support columns 212 opposite to each other in the first direction. It can be understood that there are two cross beams 213 to ensure the structural strength of the bracket body 210.

[0075] Specifically, the cross beam 213 includes a beam body 2131 and overlapping portions 2132 provided at both ends of the beam body 2131. The two ends of the beam body 2131 respectively abut against the circumferences of the corresponding support columns 212, and the overlapping portions 2132 abut against the tops of the corresponding support columns 212 to ensure the structural strength of the bracket body 210. Among them, the beam body 2131 can be a hollow tubular shape to ensure the structural strength of the cross beam 213. Among them, the overlapping portion 2132 can be in a plate shape.

[0076] Exemplarily, the overlapping portion 2132 and the support column 212 can be connected by a threaded connection. Specifically, a fifth positioning hole 2133 is provided on the overlapping portion 2132, and a sixth positioning hole (not shown) is provided at the top of the support column 212. The ring main unit further includes a fourth fastening assembly (not shown) corresponding to the overlapping portion 2132 one by one. The fourth fastening assembly includes a fourth fastener and a fourth screw kit. The fourth fastener passes through the fifth positioning hole 2133 and the sixth positioning hole and is threadedly connected to the fourth screw kit, facilitating the connection between the cross beam 213 and the support column 212.

[0077] Exemplarily, both the fifth positioning hole 2133 and the sixth positioning hole can be circular through holes.

[0078] Of course, the cross beam 213 can also be connected to the support column 212 by clamping, bonding, welding or other connection methods.

[0079] In a feasible implementation manner, a plurality of mounting holes 2122 are provided on at least one support column 212 for connecting small electrical components, and the small electrical components include but are not limited to air switches.

[0080] In this embodiment, the support frame 200 can be fixed to the cabinet body 100 by means of screw fastening. Specifically, a seventh positioning hole 2123 is provided at the bottom of the support column 212, and a fifth screw connector (not shown) passes through the seventh positioning hole 2123 and is threadedly connected to the first top surface 110, or the fifth screw connector passes through the seventh positioning hole 2123 and the first top surface 110 and is threadedly connected to a fifth screw set (not shown). Of course, the support frame 200 can also be fixed to the cabinet body 100 by means of clamping, bonding, welding or other connection methods.

[0081] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A ring main unit, characterized in that, Comprising: A cabinet body (100), the top of the cabinet body (100) being stepped, including a first top surface (110) and a second top surface (120) that are spaced apart from bottom to top along the height direction of the cabinet body (100); A support frame (200), including a bracket body (210) provided on the first top surface (110) and two fixing members (220) provided on the bracket body (210), the two fixing members (220) being spaced apart along the height direction of the cabinet body (100); A communication member (300), connected to both of the two fixing members (220).

2. The ring main unit according to claim 1, characterized in that, On both opposite sides of the communication member (300) along the height direction of the cabinet body (100), there are connecting ears (310), the connecting ears (310) and the fixing members (220) being arranged in one-to-one correspondence, and at least one first fixing hole (311) being provided on the connecting ears (310); A plurality of second fixing holes (2201) are spaced apart on the fixing member (220); Wherein, along the height direction of the cabinet body (100), the first fixing hole (311) on the same side and one of the second fixing holes (2201) are fixedly connected by bolts.

3. The ring main unit according to claim 2, characterized in that, The first fixing hole (311) is a waist-shaped hole, and the first fixing hole (311) extends along the height direction of the cabinet body (100); And / or the second fixing hole (2201) is a waist-shaped hole, and the second fixing hole (2201) extends along a first direction.

4. The ring main unit according to claim 1, characterized in that, The fixing member (220) includes a plate body (221), a first plate portion (222), and a second plate portion (223) that extend along a first direction, the first plate portion (222) being provided on a first side of the plate body (221) along a second direction, the second plate portion (223) being provided on a second side of the plate body (221) along the second direction, the first plate portion (222) and the second plate portion (223) both being perpendicular to the plate body (221), and the first plate portion (222) and the second plate portion (223) being arranged along the first direction, and at least one communication member (300) being provided on each of the first plate portion (222) and the second plate portion (223).

5. The ring main unit according to claim 4, wherein, The communication member (300) includes an optical fiber distribution frame (301) and a switch (302), the optical fiber distribution frame (301) being provided on the first plate portion (222), and the switch (302) being provided on the second plate portion (223).

6. The ring main unit according to claim 1, characterized in that, First positioning holes (2202) are provided at both ends of the fixing member (220) along the first direction; The bracket body (210) includes two support components corresponding to the fixing members (220) one-to-one, the support components including two support members (211) spaced apart along the first direction, and a plurality of second positioning holes (2111) being spaced apart along the second direction on the support members (211); Wherein, along the first direction, the first positioning hole (2202) on the same side and one of the second positioning holes (2111) are fixedly connected by bolts.

7. The ring main unit according to claim 6, characterized in that, Both ends of the support member (211) in the second direction are provided with third positioning holes (2112); The bracket body (210) further includes two column components spaced apart in the second direction. Each column component includes two support columns (212) spaced apart in the first direction. The support columns (212) are provided with a positioning hole group corresponding to the support member (211) one by one. The positioning hole group includes at least one fourth positioning hole (2121); Among them, in the second direction, the third positioning hole (2112) on the same side and one of the second positioning holes (2111) are fixedly connected by bolts.

8. The ring main unit according to claim 7, characterized in that, A cross beam (213) is connected between two support columns (212) opposite to each other in the first direction.

9. The ring main unit according to claim 8, wherein, The cross beam (213) includes a beam body (2131) and overlapping portions (2132) provided at both ends of the beam body (2131). Both ends of the beam body (2131) are respectively abutted against the circumferences of the corresponding support columns (212), and the overlapping portions (2132) are abutted against the tops of the corresponding support columns (212).

10. The ring main unit according to claim 7, characterized in that, Multiple mounting holes (2122) are provided on at least one of the support columns (212).

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