CN110571698B - Ring main unit based on high-voltage measurement - Google Patents
Ring main unit based on high-voltage measurement Download PDFInfo
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- CN110571698B CN110571698B CN201910977330.9A CN201910977330A CN110571698B CN 110571698 B CN110571698 B CN 110571698B CN 201910977330 A CN201910977330 A CN 201910977330A CN 110571698 B CN110571698 B CN 110571698B
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- bin
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- voltage
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- side wall
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- 238000005259 measurement Methods 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 239000004020 conductor Substances 0.000 claims description 9
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 5
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/03—Boards, panels, desks; Parts thereof or accessories therefor for energy meters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/005—Electrical connection between switchgear cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention provides a ring main unit based on high-voltage measurement, which comprises a cabinet body, wherein a cavity and a cable bin are formed in the cabinet body, a cabinet door is rotatably connected to the side wall of the cavity, and a bin door is rotatably connected to the side wall of the cable bin; a mounting plate is fixed in the cavity, and an electric element is fixed on the mounting plate; the upper end and the lower end of the electric element are respectively connected with an input wire and an output wire, and the end parts of each input wire and each output wire penetrate into the cable bin and extend out of the cabinet body to be connected with an external conductive circuit in series; the input wire inside the cable bin is connected with the safety mechanism, and the tail end of the safety mechanism is connected with the voltage sensor. The invention has simple structure, reasonable layout, convenient operation, safety and reliability, and ensures that the pressure sensor and the input line are disconnected through the safety mechanism when extreme conditions such as internal short circuit occur by arranging the safety mechanism between the voltage sensor and the input line, thereby not affecting the normal operation of the line and ensuring the safety and reliability of the operation in a high-voltage environment.
Description
Technical Field
The invention relates to the technical field of electrical equipment, in particular to a ring main unit based on high-voltage measurement.
Background
With the continuous development of society, urban power grids are mainly used for 'cable-to-ground', 10 kilovolt lines of power distribution networks extend into load centers, and outdoor ring main units are widely applied, wherein electric elements are located in the outdoor ring main units.
Currently, 10KV electrical elements of an urban power distribution network gradually realize bidirectional metering, which means that metering devices are added in a ring main unit. At this time, if a metering point is added for the ring main unit according to the traditional high-voltage metering scheme, the problems of narrow space of the ring main unit and incapability of installing a voltage sensor are faced; if the high-voltage metering box (cabinet) is additionally built, the problems of 'occupied land approval, civil engineering, complex criticizing flow, long construction period' and 'high manufacturing cost' are faced. Therefore, in order to avoid the above problems, and also in order to ensure the safety and reliability of operation in a high-voltage environment (i.e., when an extreme condition such as an internal short circuit occurs, the detection device can be ensured to be cut off from the power grid without affecting the normal operation of the circuit), a novel ring main unit based on high-voltage measurement needs to be developed.
Disclosure of Invention
The invention aims to solve the technical problem of providing the ring main unit based on high-pressure measurement, which has the advantages of simple structure, reasonable space layout, convenient operation and safety and reliability.
The invention adopts the following technical scheme to solve the technical problems:
the ring main unit based on high-voltage measurement comprises a cabinet body, wherein a cavity and a cable bin are formed in the cabinet body, a cabinet door is rotatably connected to the side wall of the cavity, and a bin door is rotatably connected to the side wall of the cable bin;
the inside of the cavity is fixedly connected with a mounting plate, and an electric element is fixed on the mounting plate; the upper end and the lower end of the electric element are respectively connected with a plurality of input wires and output wires, and the end parts of each input wire and output wire extend towards the direction of the cable bin to penetrate into the cable bin, finally extend to the outside of the cabinet body and are connected with an external conductive circuit in series; the input wire positioned in the cable bin is specifically connected with the safety mechanisms arranged on the inner side wall of the bin gate, and the tail end of each safety mechanism is connected with the voltage sensor fixed on the outer side wall of the bin gate; and a signal output connector is arranged on the voltage sensor.
As one of the preferable modes of the invention, the safety mechanism comprises a bottom plate, wherein both ends of the bottom plate are fixedly connected with insulating blocks, any insulating block is fixedly connected with a corresponding input line through a clamping block, and a high-voltage fuse is fixedly connected between the two insulating blocks; the two insulating blocks are respectively provided with conductors, and two ends of the high-voltage fuse are respectively electrically connected with corresponding input lines and voltage sensors through the conductors.
As one of preferable modes of the present invention, the outer periphery of the input line between the insulating block and the clamping block is peeled to form a peeled portion.
As one of the preferable modes of the invention, the outer side walls of the input line and the output line are movably clamped with a plurality of wire clamps, and the inner end of each wire clamp is movably clamped in the clamping groove; the clamping grooves are arranged in an array mode and are formed in the side wall of the mounting plate.
As one of the preferable modes of the invention, the side wall of the cabinet door is provided with an observation window and a heat dissipation barrier.
As one of the preferable modes of the invention, a baffle plate is also arranged in the middle of the cable bin; the cable bin is divided into an upper accommodating bin and a lower accommodating bin by the partition plate, and the input wire and the output wire are respectively accommodated in the upper accommodating bin and the lower accommodating bin.
Compared with the prior art, the invention has the advantages that: the invention has simple structure and reasonable space layout, is fixedly arranged on the outer side wall of the bin gate through a plurality of voltage sensors, does not need to additionally increase a cabinet body, saves the application cost, and the high-voltage end of each voltage sensor is respectively and electrically connected with an input line; meanwhile, the safety mechanism is arranged between the voltage sensor and the input line, and when extreme conditions such as internal short circuit and the like occur, the voltage sensor and the input line are disconnected through the safety mechanism, so that the normal operation of the line is not influenced, and the safety and the reliability of the device in the operation process in a high-voltage environment can be effectively ensured.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the ring main unit based on high-voltage measurement in embodiment 1 in a state where the cabinet door and the bin door are closed;
fig. 2 is a schematic diagram of the overall structure of the ring main unit in embodiment 1 in the state of opening the cabinet door and the bin door based on high-pressure measurement;
fig. 3 is a schematic diagram of the structure of the input line, the output line and the electric element in embodiment 1;
FIG. 4 is an enlarged view at A of FIG. 1;
FIG. 5 is a sectional view of the safety mechanism and input line of example 1;
FIG. 6 is a sectional view of the voltage sensor, the high voltage fuse and the input line in embodiment 1;
FIG. 7 is an enlarged view at B of FIG. 6;
FIG. 8 is an enlarged view at C of FIG. 6;
FIG. 9 is a schematic view showing the structure of the input line, the output line, the cable housing and the partition plate in embodiment 1;
fig. 10 is a schematic view of the structure of the wire clip and the clamping groove in embodiment 1;
fig. 11 is a schematic diagram showing the structures of the voltage sensor, the high voltage fuse and the input line in embodiment 1.
In the figure: 1 is a cabinet body, 2 is a cavity, 3 is a cable bin, 4 is a cabinet door, 5 is a bin door, 6 is a mounting plate, 7 is an input line, 701 is a peeling part, 8 is an output line, 9 is a safety mechanism, 901 is a bottom plate, 902 is an insulating block, 903 is a high-voltage fuse, 904 is a conductor, 905 is a clamping block, 10 is a voltage sensor, 11 is a signal output connector, 12 is an electric element, 13 is an observation window, 14 is a heat dissipation barrier, 15 is a wire clamp, 16 is a clamping groove, and 17 is a partition plate.
Detailed Description
The following describes in detail the examples of the present invention, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following examples.
Example 1
As shown in fig. 1-11, the ring main unit based on high-voltage measurement in this embodiment includes a main unit body 1, a cavity 2 and a cable bin 3 are opened in the main unit body 1, a cabinet door 4 is rotatably connected to a side wall of the cavity 2, and a bin door 5 is rotatably connected to a side wall of the cable bin 3.
Referring to fig. 2 and 3, a mounting plate 6 is fixedly connected to the interior of the cavity 2, and an electrical component 12 is fixed on the mounting plate 6 through bolts; the upper end and the lower end of the electric element 12 are respectively connected with a plurality of input wires 7 and output wires 8, a circuit on the input wires 7 flows into the electric element 12, and then current flows into the output wires 8 from the electric element 12; and, the end of each input wire 7 and output wire 8 extends towards the cable bin 3 to penetrate into the cable bin 3 and finally extends to the outside of the cabinet body 1, and is connected in series with an external conductive circuit. The upper and lower ends of the electrical element 12 are respectively provided with a jack for connecting the input line 7 and the output line 8, when the ends of the input line 7 and the output line 8 are inserted into the jacks, the ends of the input line 7 and the output line 8 are extruded into the jacks by screws arranged on the electrical element 12 to be fixed, and then the electrical element 12 is connected in series with the output line 8 in a corresponding circuit through the input line 7.
In addition, referring to fig. 2, 3 and 4, the input wires 7 inside the cable compartment 3 are specifically connected to the safety mechanisms 9 installed on the inner side walls of the compartment door 5, each input wire 7 is connected to each safety mechanism 9 in a one-to-one correspondence manner, and the tail end of each safety mechanism 9 is electrically connected to the voltage sensor 10 fixed on the outer side wall of the compartment door 5, where the safety mechanisms 9 are used for guaranteeing the safety and reliability of the operation of the voltage sensor 10 in the high-voltage environment. The voltage sensor 10 can be a capacitive voltage divider and a resistive voltage divider, an ageing-resistant insulating potting material is adopted for filling, one end, connected with the safety mechanism 9, of the voltage sensor 10 is a high-voltage access end, a signal output connector 11 is arranged on the voltage sensor 10, the voltage sensor 10 can be in signal connection with an external electric energy meter through the signal output connector 11, and then the device can start to detect only by simply inserting an external electric energy meter connecting wire on the signal output connector 11 during measurement, the signal output connector 11 is a secondary low-voltage lead-out signal end, and the generated voltage is small.
Further, referring to fig. 2, 3, 5, 6, 7 and 11, in the present embodiment, the safety mechanism 9 specifically includes a base plate 901, an insulating block 902, a high voltage fuse 903, a conductor 904 and a clamping block 905; the bottom plate 901 is fixed on the inner side wall of the bin gate 5, two ends of the bottom plate 901 are fixedly connected with insulating blocks 902, any insulating block 902 is fixedly connected with a corresponding input line 7 through a clamping block 905, and a high-voltage fuse 903 is fixedly connected between the two insulating blocks 902; conductors 904 are further disposed in the two insulating blocks 902, and two ends of the high-voltage fuse 903 are electrically connected to the corresponding input line 7 and the voltage sensor 10 through the conductors 904; when an extreme condition such as an internal short circuit occurs, the high-voltage fuse 903 disconnects the detection circuit from the input line 7, so that the safety and reliability of the operation of the voltage sensor 10 in a high-voltage environment are ensured, the detection device is ensured to be cut off from the power grid, and the normal operation of the line is not influenced.
Further, in the present embodiment, the structure of the high voltage fuse 903 specifically includes a fuse tube, a contact conductive portion, and the like, in which fine quartz sand particles for arc extinction are filled, and the fuse is a wire or a metal sheet made of a metal material having a lower melting point, and is connected in series in a protected circuit; when the circuit or the equipment in the circuit is overloaded or fails, the melting piece heats and melts, so that the circuit is cut off, and the purpose of protecting the circuit or the equipment is achieved; the high voltage fuse 903 is currently disclosed and used in a technical scheme, and the structure and principle of the high voltage fuse 903 are not the technical features of the present invention, so that details are not described, for example, the model of the high voltage fuse 903 is XRNT1-12/200.
Further, referring to fig. 5, 6 and 8, in this embodiment, the input line 7 between the insulating block 902 and the clamping block 905 is peeled to form a peeled portion 701; here, the stripped portion 701 of the input wire 7 exposes the conductive copper wire of the input wire 7 to the outside, and then, after being clamped by the clamping block 905, the conductive copper wire of the stripped portion 701 of the input wire 7 is in direct contact with the conductor 904, thereby achieving electrical connection. Furthermore, a wire slot is further formed between the insulating block 902 and the clamping block 905, and the diameter of the wire slot is smaller than the diameter of the peeled part 701 of the input wire 7, so that the insulating block 902 and the clamping block 905 can clamp the input wire 7 more firmly.
Further, referring to fig. 2 and 10, in this embodiment, a plurality of wire clamps 15 are movably clamped on the outer side walls of the input wire 7 and the output wire 8, and the inner end of each wire clamp 15 is movably clamped inside the clamping groove 16; the clamping grooves 16 are arranged in an array manner and are formed on the side wall of the mounting plate 6. The number of the wire clamps 15 can be properly increased according to the lengths of the input wire 7 and the output wire 8 in the cavity 2, so that the arrangement of the input wire 7 and the output wire 8 is clear and not disordered, and the inside of the cavity 2 is kept clean.
Further, referring to fig. 1, in the present embodiment, an observation window 13 and a heat dissipation barrier 14 are disposed on a side wall of the cabinet door 4. Wherein the observation window 13 is convenient for observing the working condition of the electric element 12 in the cavity 2; the heat dissipation barrier 14 is beneficial to the heat dissipation of the electric element 12 in the cavity 2 during operation, thereby achieving the heat dissipation effect.
Further, referring to fig. 2 and 9, in this embodiment, a partition 17 is further installed in the middle of the cable bin 3; the cable bin 3 is divided into an upper accommodating bin and a lower accommodating bin by a partition plate 17, the upper accommodating bin is internally provided with an input wire 7, and the lower accommodating bin is internally provided with an output wire 8; the separator 17 can separate the input line 7 and the output line 8 inside the cable bin 3, so that a manager can quickly judge the types of the lines, and the management of the lines is facilitated.
In addition, as shown in fig. 1, in this embodiment, a handle (not labeled in the figure) is further disposed on each of the cabinet door 4 and the bin door 5, and the cabinet door 4 and the bin door 5 can be opened to the state shown in fig. 2 by pulling the handle; because the device is a high-voltage electric device, in order to ensure public safety, a mechanical lock (not labeled in the figure) can be arranged at the opening and closing positions of the cabinet door 4 and the bin door 5, so that the cabinet door 4 and the bin door 5 are locked when being closed, and the cabinet door 4 and the bin door 5 are prevented from being opened at will to endanger public safety.
Working principle: during installation, firstly, the electric element 12 is fixedly installed on the installation plate 6, and the input wire 7 and the output wire 8 in the cable bin 3 are pulled into the cavity 2 and connected to the electric element 12; then, peeling the proper position of the input wire 7 in the cable bin 3, electrically connecting the peeled position 701 of the input wire 7 with the safety mechanism 9, and electrically connecting the other end of the safety mechanism 9 with the voltage sensor 10; at this time, after the electric element 12 is opened and electrified, the bin door 5 and the cabinet door 4 are closed, so that the normal operation of the device can be realized; during high-voltage detection, the detection can be started only by simply inserting an external electric energy meter connecting wire on the signal output connector 11; when an extreme condition such as an internal short circuit occurs, the pressure sensor 10 is disconnected from the input line 7 through the safety mechanism 9, so that the safety and reliability of operation in a high-pressure environment are ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. The ring main unit based on high-pressure measurement is characterized by comprising a main unit body (1), wherein a cavity (2) and a cable bin (3) are formed in the main unit body (1), a cabinet door (4) is rotatably connected to the side wall of the cavity (2), and a bin door (5) is rotatably connected to the side wall of the cable bin (3);
the inside of the cavity (2) is fixedly connected with a mounting plate (6), and an electric element (12) is fixed on the mounting plate (6); the upper end and the lower end of the electric element (12) are respectively connected with a plurality of input wires (7) and output wires (8), and the end parts of each input wire (7) and each output wire (8) extend towards the direction of the cable bin (3) to penetrate into the cable bin (3) and finally extend to the outside of the cabinet body (1) and are connected in series with an external conductive circuit; the input line (7) positioned in the cable bin (3) is specifically connected with the safety mechanism (9) arranged on the inner side wall of the bin gate (5), and the tail end of each safety mechanism (9) is connected with the voltage sensor (10) fixed on the outer side wall of the bin gate (5); the voltage sensor (10) is provided with a signal output connector (11);
the safety mechanism (9) comprises a bottom plate (901), insulating blocks (902) are fixedly connected to two ends of the bottom plate (901), any insulating block (902) is fixedly connected with a corresponding input line (7) through a clamping block (905), and a high-voltage fuse (903) is fixedly connected between the two insulating blocks (902); conductors (904) are arranged in the two insulating blocks (902) respectively, and two ends of the high-voltage fuse (903) are electrically connected with corresponding input lines (7) and voltage sensors (10) through the conductors (904); a peeling part (701) is arranged on the periphery of the input line (7) between the insulating block (902) and the clamping block (905);
in addition, the side wall of the cabinet door (4) is provided with an observation window (13) and a heat dissipation barrier (14).
2. The ring main unit based on high-voltage measurement according to claim 1, wherein a plurality of wire clamps (15) are movably clamped on the outer side walls of the input wire (7) and the output wire (8), and the inner end of each wire clamp (15) is movably clamped in a clamping groove (16); the clamping grooves (16) are arranged in an array mode and are formed in the side wall of the mounting plate (6).
3. The ring main unit based on high-voltage measurement according to claim 1, wherein a partition (17) is further installed in the middle of the cable bin (3); the cable bin (3) is divided into an upper accommodating bin and a lower accommodating bin by the partition plate (17), and the input wire (7) and the output wire (8) are respectively accommodated in the upper accommodating bin and the lower accommodating bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910977330.9A CN110571698B (en) | 2019-10-15 | 2019-10-15 | Ring main unit based on high-voltage measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910977330.9A CN110571698B (en) | 2019-10-15 | 2019-10-15 | Ring main unit based on high-voltage measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110571698A CN110571698A (en) | 2019-12-13 |
| CN110571698B true CN110571698B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910977330.9A Active CN110571698B (en) | 2019-10-15 | 2019-10-15 | Ring main unit based on high-voltage measurement |
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| CN (1) | CN110571698B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111082321A (en) * | 2019-12-31 | 2020-04-28 | 安徽明诚电力设备安装有限公司 | Safe ring main unit |
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| CN107947127A (en) * | 2017-12-23 | 2018-04-20 | 珠海浩云电气有限公司 | A kind of power distribution cabinet temperature protection system |
| CN108879400A (en) * | 2018-07-26 | 2018-11-23 | 许继集团有限公司 | A kind of exchange header box |
| CN209267882U (en) * | 2018-09-15 | 2019-08-16 | 电管家电器(上海)有限公司 | One kind is novel can convenient for wiring electrical complete cabinet |
| CN210490246U (en) * | 2019-10-15 | 2020-05-08 | 国网安徽省电力有限公司阜阳供电公司 | Ring main unit based on high-voltage measurement |
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|---|---|
| CN110571698A (en) | 2019-12-13 |
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Address after: 236017 no.216, Yingnan Road, Yingzhou District, Fuyang City, Anhui Province Applicant after: State Grid Anhui Electric Power Company Fuyang Power Supply Company Applicant after: STATE GRID CORPORATION OF CHINA Address before: 236017 Yingnan road 30, Yingzhou District, Fuyang, Anhui Applicant before: State Grid Anhui Electric Power Company Fuyang Power Supply Company Applicant before: STATE GRID CORPORATION OF CHINA |
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