A ring main unit used in a smart distribution network

Abstract

The present invention discloses a ring main unit (RMU) for use in a smart power distribution network, comprising a cabinet, an indicator unit, and an electrical unit. The cabinet comprises a frame and a protective plate disposed on the periphery of the frame, wherein the frame and the protective plate define a storage space for carrying the indicator unit and the electrical unit. The RMU of the present invention rationally arranges the various components of the indicator unit and the electrical unit within the cabinet, facilitating rapid assembly and commissioning of electrical components, as well as replacement and disassembly of the electrical components. Furthermore, the present invention provides a connecting component for rapidly connecting the wires of the electrical components, facilitating rapid connection of wires on tightly mounted electrical components, further increasing the assembly speed of the RMU.

Description

Technical Field

[0001] The present invention relates to the technical field of ring main units, and in particular to a ring main unit used in a smart distribution network. Background Art

[0002] A ring main unit (RMU) is a switchgear cabinet installed for each distribution branch. The busbars of the switchgear cabinets are also part of the ring main line. Alternatively, the ring main line is formed by connecting the busbars of each outgoing cabinet. Each outgoing cabinet is called a "RMU." A RMU is a group of electrical transmission and distribution equipment housed in a metal or non-metallic insulated cabinet or assembled as a compartmentalized ring main power supply unit. It is widely used in urban residential areas, high-rise buildings, large public buildings, factories, and enterprises. To reduce floor space and resources, the space within a RMU is currently densely packed with electrical components such as circuit breakers, insulators, and CT transformers. To properly install the electrical components, RMU assemblers typically install the various components within the cabinet first and then connect them one by one using wires. However, the close proximity and irrational distribution of electrical components in existing RMUs makes wire connections difficult, resulting in a time-consuming and labor-intensive assembly process, a messy arrangement, and inconvenient maintenance. Summary of the Invention

[0003] The present invention provides a ring main unit for use in a smart distribution network to solve the problem that electrical components in an existing ring main unit are arranged irrationally, resulting in difficulties in wiring or assembly, and in maintenance.

[0004] In order to achieve the above invention objectives, the technical means adopted are:

[0005] A ring main unit used in a smart distribution network, characterized by comprising a cabinet body, an indicating unit and an electrical unit;

[0006] The cabinet includes a frame and a protective plate arranged on the periphery of the frame, and the frame and the protective plate form a receiving space for carrying the indicating unit and the electrical unit;

[0007] The indicating unit includes a status display component, an indicator light group and a control switch provided on the protective plate, wherein the control switch is provided below the indicator light group and the status display component is provided outside the indicator light group;

[0008] The electrical unit includes a vacuum circuit breaker, a current transformer, an isolating switch, an insulator and a lightning arrester. The vacuum circuit breaker is embedded in the accommodating space through the protective plate. The current transformer is arranged on one side of the vacuum circuit breaker. The isolating switch and the lightning arrester are respectively arranged at the upper and lower ends of the vacuum circuit breaker. The insulator is arranged at the bottom end of the current transformer.

[0009] In the above scheme, the indicating unit can be used to adjust and display the various states of the ring network cabinet. It is set on the protective plate to monitor and adjust the state, which is convenient for maintenance work; the electrical unit provides guarantee and protection for the connection of the ring network line. By reasonably arranging the indicating unit and the various components in the electrical unit in the cabinet, it is convenient for the electrical components to be quickly assembled and put into use. It is also convenient for the replacement and disassembly of the electrical components, thereby improving the efficiency of maintenance work.

[0010] Preferably, the status display comprises a microcomputer protection meter, an ammeter, and a voltmeter, which are sequentially mounted on the protective plate, with the ammeter and voltmeter positioned above the indicator light assembly. In this preferred embodiment, the vacuum circuit breaker can close, carry, and interrupt current under normal circuit conditions, as well as close, carry within a specified time period, and interrupt current under abnormal circuit conditions.

[0011] Preferably, the protective plate is composed of a front panel and a rear panel, a first side panel and a second side panel, and an upper panel and a lower panel, arranged opposite each other, to form a cube. The first side panel is provided with a plurality of wire inlet holes and mounting holes, wherein a cooling fan is embedded and mounted in the mounting holes. The upper panel is provided with a cooling hole opposite the cooling fan outlet. The second side panel is provided with a wire outlet hole. In this preferred embodiment, the wires connecting the electrical components enter and exit the ring main unit through the wire inlet and outlet holes, respectively, which can keep the wires in the ring main unit neatly arranged and facilitate subsequent disassembly and assembly.

[0012] Preferably, two electrical components in the ring main unit are connected via a connecting component, the connecting component comprising a first connecting assembly, a second connecting assembly, and a locking assembly, one end of the first connecting assembly being connected to a wire of one of the electrical components, one end of the second connecting assembly being connected to a wire of the other electrical component, and the other ends of the first connecting assembly and the second connecting assembly being detachably connected via a locking assembly. In this preferred embodiment, since the space within the ring main unit is tightly filled with electrical components, connecting the wires between the electrical components in the ring main unit is inconvenient. The connecting component facilitates quick connection of the wires of the two electrical components, eliminating the need for complex wiring and improving the assembly efficiency of the ring main unit.

[0013] Preferably, the first and second connecting assemblies have the same structure, each comprising a first clamping member, two first cutting members, a first protective body, and a second clamping member. The first and second clamping members are parallel and installed within the first protective body from the same end, and the two first cutting members are symmetrically embedded in the other end of the first protective body. In this preferred embodiment, the first clamping member, the first cutting member, the first protective body, and the second clamping member cooperate with each other to facilitate the removal of the wire sheath and the connection of the copper wires, making the operation process simple and convenient.

[0014] Preferably, the first protective body includes a first shell and a mounting column symmetrically arranged on one end of the first shell, a through hole is axially opened in the first shell, the mounting column and the through hole of the first shell are connected, and the two first cutting members are respectively embedded in the mounting column.

[0015] Preferably, the first cutting member includes a spring, a pressing body, and a cutting blade. The pressing body includes a pressure column and a limiting disc provided at one end of the pressure column. The cutting blade is fixed to the end of the pressure column. The spring is sleeved around the cutting blade. The pressure column and cutting blade are slidably arranged within the mounting column via the limiting disc. The cutting blade is provided with a semicircular blade tip at the end away from the limiting disc and is embedded in the perforation. In this preferred embodiment, the first cutting member can be used to cut and remove wires and wire sheaths.

[0016] Preferably, an initial positioning body is provided at one end of the through hole close to the mounting column. The initial positioning body is a hollow conical structure composed of four triangular rubber sheets and is used to perform initial positioning on the wires of the current transformer or ammeter.

[0017] Preferably, the first clamping member includes a mounting frame, a clamping plate and a push rod; the mounting frame includes a first annular disk and a second annular disk arranged opposite to each other, the first annular disk is provided with a supporting leg along the outer peripheral wall, one end of the push rod is embedded and fixed in the supporting leg, the end outer wall of the first shell is provided with a limiting hole, the other end of the push rod passes through the limiting hole of the first shell; the end of the first shell is also provided with a baffle, and the baffle is provided with a number of limiting protrusions; the outer end edge of the second annular disk is embedded and engaged in the limiting space formed by the limiting protrusion and the baffle of the first shell; one end of the clamping plate is embedded and arranged between the first annular disk and the second annular disk, and the other end of the clamping plate is embedded and arranged in the limiting protrusion.

[0018] Preferably, the locking assembly includes a first locking shell and a second locking shell, and the first locking shell and the second locking shell are respectively slidably mounted on the protective bodies of the first connecting assembly and the second connecting assembly; the inner wall of the first locking shell is provided with an internal thread, and the outer wall of the second locking shell is provided with an external thread, and the internal thread of the first locking shell is screwed together with the external thread of the second locking shell.

[0019] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0020] The ring network cabinet of the present invention arranges the various components in the indicating unit and the electrical unit reasonably within the cabinet body, thereby facilitating the rapid assembly and commissioning of electrical components, and also facilitating the replacement and disassembly of electrical components. In addition, the present invention also provides connecting components for quickly connecting the wires of electrical components, facilitating the rapid connection of wires on tightly installed electrical components, and further improving the assembly speed of the ring network cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the ring network cabinet of the present invention.

[0022] Figure 2 It is a schematic diagram of the explosion structure of the ring network cabinet of the present invention.

[0023] Figure 3 It is a side view of the ring main unit of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the connecting components in the ring network cabinet of the present invention.

[0025] Figure 5 It is a schematic diagram of the exploded structure of the connecting components in the ring network cabinet of the present invention.

[0026] Figure 6 This is a schematic structural diagram of the first cutting member in the present invention.

[0027] Figure 7 This is a schematic diagram of the first protective body and its partial enlargement in the present invention.

[0028] Figure 8 It is a structural schematic diagram of the installation column in the present invention.

[0029] Figure 9 It is a structural schematic diagram of the initial positioning body in the present invention.

[0030] Figure 10 Schematic diagram of the structure of the clamping member in the present invention.

[0031] Figure 11 It is a side view of the first connecting component in the present invention.

[0032] Figure 12 Schematic diagram of the clamping structure of the first connecting component in the present invention. DETAILED DESCRIPTION

[0033] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting this patent;

[0034] In order to better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size;

[0035] It is understandable to those skilled in the art that some well-known structures and descriptions thereof may be omitted in the drawings.

[0036] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] A ring main unit used in a smart distribution network, such as Figure 1 and 2 As shown, it includes a cabinet 100, an indicating unit 200 and an electrical unit 300;

[0039] The cabinet 100 includes a frame 101 and a protective plate 102 disposed on the periphery of the frame 101. The frame 101 and the protective plate 102 form a receiving space N1 for carrying the indicating unit 200 and the electrical unit 300.

[0040] The indicating unit 200 is used to regulate and display the various states of the current, voltage, humidity or temperature of the ring network cabinet, so as to facilitate viewing by maintenance personnel. It includes a display part 201, an indicator light group 202, and a control switch 203 arranged on the front panel 102a of the protective plate 102. The control switch 203 is arranged below the indicator light group 202, and the status display part 201 is arranged on the periphery of the indicator light group 202; the status display part 201, the indicator light group 202 and the control switch 203 are all connected to the controller; wherein, the status display part 201 includes a microcomputer protection meter, an ammeter and a voltmeter, the ammeter is arranged between the microcomputer protection meter and the voltmeter, and the ammeter and voltmeter are arranged directly above the indicator light group 202.

[0041] The electrical unit includes a vacuum circuit breaker 301, a current transformer 302, a disconnector 303, an insulator 304, and a lightning arrester 305. The vacuum circuit breaker 301 is embedded within the housing space N1 through the front panel 102a of the protective plate 102. The current transformer 302 is located on one side of the vacuum circuit breaker 301. The disconnector 303 and lightning arrester 305 are located at the top and bottom ends of the vacuum circuit breaker 301, respectively. The insulator 304 is located at the bottom end of the current transformer 302. The vacuum circuit breaker 301 is used to close, carry, and interrupt current under normal circuit conditions and can close, carry, and interrupt current under abnormal circuit conditions within a specified time. The circuit breaker control panel 301a of the vacuum circuit breaker 301 is equipped with a manual knob 301a-1 and a status indicator light 301a-2. The insulator 304 supports and secures the current-carrying conductor, providing good insulation between the current-carrying conductor and the ground.

[0042] In this embodiment, the protective plate 102 is composed of a front panel 102a and a rear panel, a first side panel 102b and a second side panel 102c, an upper panel 102d and a lower panel, which are respectively arranged opposite to each other and form a cube; the first side panel 102b of the protective plate 102 is provided with a wire inlet hole 102b-1 and a mounting hole 102b-2; wherein, the cooling fan 103 of the cabinet 100 is embedded in the mounting hole 102b-2 by bolts, and a cooling hole is provided on the upper panel 102d at a position opposite to the air outlet of the cooling fan 103.

[0043] Example 2

[0044] This embodiment 2 is a variation of embodiment 1, and the difference is that two electrical components in the ring network cabinet are connected through a connecting component 400, and the connecting component 400 includes a first connecting component 401, a second connecting component 402 and a locking component 403. One end of the first connecting component 401 is connected to the wire of one of the electrical components, and one end of the second connecting component 402 is connected to the wire of the other electrical component. The other ends of the first connecting component 401 and the second connecting component 402 are detachably connected via the locking component 403. By setting the first connecting component 401, the second connecting component 402 and the locking component 403 to cooperate with each other, it is convenient to quickly connect the wires on the tightly installed electrical components, thereby improving the assembly speed, facilitating the rapid commissioning of the ring network cabinet, and avoiding the cumbersome process of connecting electrical components. Figure 5 As shown, the first connecting component 401 and the second connecting component 402 have the same structure and are mirror-imaged. The first connecting component 401 and the second connecting component 402 play the role of clamping, cutting and connecting wires.

[0045] When in use, the electrical components in the ring network cabinet need to be connected by wires. In this embodiment, the current transformer 302 and the ammeter are used as an example. Figure 3 and Figure 4 As shown, the current transformer 302 is connected to the ammeter through the connecting component 400. The specific installation process is as follows: before installation, the assembler first connects a wire to each of the terminal blocks to be connected to the current transformer 302 and the ammeter through bolts, and installs one end of the first connecting component 401 and the second connecting component 402 on the other ends of the two wires, respectively. Then, the current transformer 302 and the ammeter are installed in the cabinet 100. The space in the cabinet 100 is tightly filled with the electrical unit 300. When the current transformer 302 and the ammeter need to be connected, the first connecting component 401 connected to the wire of the current transformer 302 can be connected to the second connecting component 402 connected to the wire of the ammeter. Finally, the first connecting component 401 and the second connecting component 402 are fixed by the locking component 403, so that it is convenient for the operator to connect the lines.

[0046] Example 3

[0047] like Figure 5 This embodiment is different from the above embodiments in that: the first connecting component 401 includes a first clamping member 401a, a first cutting member 401b, a first protective body 401c and a second clamping member 401d. By cooperating with each other, the first clamping member 401a, the first cutting member 401b, the first protective body 401c and the second clamping member 401d, it is possible to facilitate the removal of the wire sheath and the connection between the copper wires of the wires, and the operation process is simple, convenient and fast. Specifically, the first connecting component 401 includes a first clamping member 401a, a first cutting member 401b, a first protective body 401c and a second clamping member 401d. The first clamping member 401a, the second clamping member 401d and the first cutting member 401b are all embedded in the first protective body 401c. The first clamping member 401a and the second clamping member 401d are parallel and installed in the first protective body 401c from the same end of the first protective body 401c. Specifically, there are two first cutting members 401b. The two first cutting members 401b are symmetrical and are respectively embedded in two symmetrical mounting columns 401c-1 set on the first protective body 401c. The two first cutting members 401b have the same structure.

[0048] Further, such as Figures 6 to 8 As shown, the first cutting member 401b includes a spring 401b-1, a pressing body 401b-2 and a cutting knife 401b-3. In this embodiment, the cutting knife 401b-3 is fixed to the bottom end of the pressing body 401b-2 by screws or strong glue, and the spring 401b-1 is wound around the periphery of the cutting knife 401b-3, and its two ends are respectively in contact with the limiting disk 401b-21 of the pressing body 401b-2 and the first shell 401c-2 of the first protective body 401c, and the upper end edge of the limiting disk 401b-21 is in contact with the limiting ring 401c-11 of the mounting column 401c-1, and the limiting disk 401b-21 can slide in the mounting column 401c-1, and a pressure column 401b-22 is fixed on the limiting disk 401b-21, and the diameter of the pressure column 401b-22 is smaller than the limiting disk 401b-21. The inner diameter of the positioning ring 401c-11 is smaller than the inner diameter of the mounting column 401c-1, and the inner diameter of the limiting disk 401b-21 is between the inner diameter of the mounting column 401c-1 and the inner diameter of the limiting ring 401c-11. It should be noted that the cutting knife 401b-3 is provided with a semicircular knife tip 401b-31 at the end away from the limiting disk 401b-21, and the semicircular knife tip 401b-31 passes through the cutting hole 401c-21 of the first shell 401c-2 and is embedded in the through hole 401c-22 of the first shell 401c-2; when the first cutting member 401b is in the non-cutting state, the spring 401b-1 is in the original state, and when the pressing body 401b-2 of the first cutting member 401b presses and cuts, the spring 401b-1 is in a compressed state.

[0049] Further, such as Figure 7 and Figure 9 As shown, an initial positioning body 401e is provided at one end of the through hole 401c-22 near the first cutting piece 401b. The initial positioning body 401e is used to initially fix one end of the wire and prevent the wire from falling off. It should be noted that the initial positioning body 401e is a hollow conical structure made of four triangular rubber sheets, and the top of the initial positioning body 401e is close to one end of the semicircular blade tip 401b-31.

[0050] The rest of the structure is the same as that of Example 2.

[0051] During use, one end of the wire is connected to the ammeter through a bolt, and the other end first passes through the initial positioning body 401e and then through the first clamping piece 401a. The assembler can cut the passed wire according to the wiring needs, and then clamp the wire through the first clamping piece 401a. At this time, the operator can press the symmetrically arranged first cutting piece 401b at the same time. Under the action of pressure, the symmetrically arranged semicircular knife tip 401b-31 can cut the insulating sheath of the wire. Then the first clamping piece 401a releases the wire, and the assembler passes the cutting point through the first clamping piece 401a and the second clamping piece 401d in turn. After passing through the second clamping piece 401d, the first clamping piece 401a is used again to clamp the wire, and the assembler pulls out the insulating sheath of the wire at the cut. The wires connected to the current transformer 302 are processed in the same manner as above. The exposed copper wire of the wire connected to the ammeter passes through the second clamping piece 401d of the second connecting component 402, and the copper wire connected to the ammeter and the copper wire connected to the current transformer 302 are clamped by the second clamping piece 401d of the second connecting component 402. The exposed copper wire of the wire connected to the current transformer 302 passes through the second clamping piece 401d of the first connecting component 401, and the copper wire connected to the ammeter and the copper wire connected to the current transformer 302 are clamped by the second clamping piece 401d of the first connecting component 401. Finally, the first connecting component 401 and the second connecting component 402 are locked by the locking component 403, thereby realizing the connection between the ammeter and the current transformer 302.

[0052] Example 4

[0053] like Figure 10This embodiment is different from the above embodiments in that the first clamping member 401a includes a mounting frame 401a-1, a clamping plate 401a-2 and a push rod 401a-3. By cooperating with each other, the mounting frame 401a-1, the clamping plate 401a-2 and the push rod 401a-3, the conductor or copper wire can be clamped. Specifically, the first clamping member 401a includes a mounting frame 401a-1, a clamping plate 401a-2 and a push rod 401a-3, one end of the push rod 401a-3 is embedded in the support leg 401a-11 fixed to the mounting frame 401a-1, and the other end passes through the limiting hole 401c-23 of the first shell 401c-2, the two ends of the support leg 401a-11 are respectively fixedly connected to the first annular disk 401a-12 and the second annular disk 401a-13 of the mounting frame 401a-1, the outer end edge of the second annular disk 401a-13 is embedded in the limiting space N3 formed by the limiting protrusion 401c-24 of the first shell 401c-2 and the baffle 401c-25 of the first shell 401c-2, and one end of the clamping plate 401a-2 is embedded in the first annular disk 401a-12 and the second annular disk 401a-13. The first annular disk 401a-12 and the second annular disk 401a-13 are embedded in the installation space N2 formed between the annular disk 401a-12 and the second annular disk 401a-13, and the other end is embedded in the slot L2 of the limit block 401c-26 of the first shell 401c-2. In this embodiment, the limit protrusion 401c-24 is fixed on one side of the limit block 401c-26. Specifically, the clamping plate 401a-2 is axially connected to the first annular disk 401a-12 and the second annular disk 401a-13 through a rotating shaft, wherein the first annular disk 401a-12 and the second annular disk 401a-13 are both provided with a through hole L1, wherein the support leg 401a-11, the first annular disk 401a-12 and the second annular disk 401a-13 are an integrated structure, and the first clamping member 401a is made of insulating and high-temperature resistant plastic.

[0054] In this embodiment, Figure 11 and Figure 12As shown, three support legs 401a-11, clamping plates 401a-2 and push rods 401a-3 are respectively provided, and the three support legs 401a-11 are respectively between the first annular disk 401a-12 and the second annular disk 401a-13, and one end of the three push rods 401a-3 is respectively embedded and fixed in the three support legs 401a-11, and the three clamping plates 401a-2 are equidistantly located in the installation space N2. In this embodiment, the clamping plate 401a-2 is a gourd-shaped structure, the through hole 401c-22 and the through hole L1 of the first annular disk 401a-12 and the second annular disk 401a-13 are located on the same horizontal plane, the limiting hole 401c-23 is a long strip structure, and the inner walls of the two ends of the long strip limiting hole 401c-23 are respectively provided with arc protrusions, and the push rod 401a-3 is provided with an arc protrusion on the outer periphery of one end near the limiting hole 401c-23. The arc protrusion of the push rod 401a-3 and the arc protrusion of the long strip limiting hole 401c-23 are staggered, so as to facilitate the limitation.

[0055] A rubber block is provided on the clamping end of the clamping plate 401a-2 of the second clamping piece 401d of the second connecting assembly 402. The rubber blocks on the clamping ends of the three clamping plates 401a-2 can form a complete solid cylindrical structure. Since rubber has a certain deformability, the rubber blocks on the clamping ends of the three clamping plates 401a-2 can squeeze the two copper wires tightly together, further ensuring the connection between the electrical components.

[0056] The rest of the structure is the same as that of Example 3.

[0057] Example 5

[0058] like Figure 5 This embodiment differs from the above embodiment in that the locking assembly 403 includes a first locking shell 403a and a second locking shell 403b. The first locking shell 403a and the second locking shell 403b cooperate with each other to lock the first clamping member 401a and the second clamping member 401d. Specifically, the locking assembly 403 includes a first locking shell 403a and a second locking shell 403b. The first locking shell 403a and the second locking shell 403b are respectively mounted on the protective body 401c of the first connecting assembly 401 and the protective body 401c of the second connecting assembly 402. The first locking shell 403a and the second locking shell 403b are respectively slidable along the periphery of the protective body 401c of the first connecting assembly 401 and the protective body 401c of the second connecting assembly 402. The inner wall of the first locking shell 403a is provided with an internal thread. The internal thread of the first locking shell 403a is screwed together with the external thread of the second locking shell 403b.

[0059] Furthermore, a slope is provided on the inner wall of the first locking shell 403a away from the end with the internal thread, and a slope is provided on the inner wall of the second locking shell 403b away from the end with the external thread, wherein the slope of the first locking shell 403a cooperates with the slope surface of the protective body 401c of the first connecting component 401, and the slope of the second locking shell 403b can conflict with the slope surface of the protective body 401c of the second connecting component 402.

[0060] The terms used in the drawings to describe positional relationships are for illustrative purposes only and should not be construed as limiting this patent;

[0061] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A ring main unit used in a smart distribution network, characterized in that: It includes a cabinet, an indicating unit and an electrical unit; The cabinet includes a frame and a protective plate arranged on the periphery of the frame, and the frame and the protective plate form a receiving space for carrying the indicating unit and the electrical unit; The indicating unit includes a status display component, an indicator light group and a control switch provided on the protective plate, wherein the control switch is provided below the indicator light group and the status display component is provided outside the indicator light group; The electrical unit includes a vacuum circuit breaker, a current transformer, an isolating switch, an insulator, and a lightning arrester. The vacuum circuit breaker passes through the protective plate and is embedded in the accommodating space. The current transformer is arranged on one side of the vacuum circuit breaker. The isolating switch and the lightning arrester are respectively arranged at the upper and lower ends of the vacuum circuit breaker. The insulator is arranged at the bottom end of the current transformer. The protective plate is composed of a front panel and a rear panel, a first side panel and a second side panel, and an upper panel and a lower panel, which are respectively arranged opposite to each other and form a cube; the first side panel is provided with a plurality of wire inlet holes and mounting holes, and a heat dissipation fan is embedded and installed in the mounting holes; the upper panel is provided with a heat dissipation hole at a position opposite to the air outlet of the heat dissipation fan; the second side panel is provided with a wire outlet hole; The two electrical components in the ring main unit are connected by a connecting component, the connecting component including a first connecting component, a second connecting component and a locking component, one end of the first connecting component is connected to the wire of one of the electrical components, one end of the second connecting component is connected to the wire of the other electrical component, and the other ends of the first connecting component and the second connecting component are detachably connected by the locking component; The first connecting component and the second connecting component have the same structure, both including a first clamping member, two first cutting members, a first protective body and a second clamping member. The first clamping member and the second clamping member are parallel and installed in the first protective body from the same end of the first protective body. The two first cutting members are symmetrical and respectively embedded in the other end of the first protective body.

2. The ring main unit used in the smart distribution network according to claim 1, characterized in that: The state display component includes a microcomputer protection meter, an ammeter and a voltmeter which are sequentially arranged on the protection plate, and the ammeter and the voltmeter are located above the indicator light group.

3. The ring main unit used in the smart distribution network according to claim 1, characterized in that: The first protective body includes a first shell and a mounting post symmetrically arranged on one end of the first shell. A through-hole is axially opened in the first shell and passes through the first shell. The mounting post and the through-hole of the first shell are connected. The two first cutting members are respectively embedded in the mounting post.

4. The ring main unit used in the smart distribution network according to claim 3, characterized in that: The first cutting member includes a spring, a pressing body and a cutting knife. The pressing body includes a pressure column and a limiting disc arranged at one end of the pressure column. The cutting knife is fixed to the end of the pressure column. The spring is sleeved outside the cutting knife. The pressure column and the cutting knife are slidably arranged in the mounting column through the limiting disc. The cutting knife is provided with a semicircular knife tip at the end away from the limiting disc and is embedded in the through hole.

5. The ring main unit used in the smart distribution network according to claim 4, characterized in that: An initial positioning body is provided at one end of the through hole close to the mounting column. The initial positioning body is a hollow conical structure composed of four triangular rubber sheets and is used for initial positioning of the wires of the current transformer or ammeter.

6. The ring main unit used in the smart distribution network according to claim 5, characterized in that: The first clamping member includes a mounting frame, a clamping plate and a push rod; the mounting frame includes a first annular disk and a second annular disk arranged opposite to each other, the first annular disk is provided with a supporting leg along the outer peripheral wall, one end of the push rod is embedded and fixed in the supporting leg, the end outer wall of the first shell is provided with a limiting hole, the other end of the push rod passes through the limiting hole of the first shell; the end of the first shell is also provided with a baffle, and the baffle is provided with a number of limiting protrusions; the outer end edge of the second annular disk is embedded and engaged in the limiting space formed by the limiting protrusion and the baffle of the first shell; one end of the clamping plate is embedded and arranged between the first annular disk and the second annular disk, and the other end of the clamping plate is embedded and arranged in the limiting protrusion.

7. The ring main unit used in the smart distribution network according to claim 6, characterized in that: The locking assembly includes a first locking shell and a second locking shell, which are respectively slidably mounted on the protective bodies of the first connecting assembly and the second connecting assembly; the inner wall of the first locking shell is provided with an internal thread, and the outer wall of the second locking shell is provided with an external thread, and the internal thread of the first locking shell is screwed together with the external thread of the second locking shell.

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