WO2008095415A1 - Transformateur de courant de type à noyau troué avec un voile antivol pour détecter facilement la tension - Google Patents

Transformateur de courant de type à noyau troué avec un voile antivol pour détecter facilement la tension Download PDF

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Publication number
WO2008095415A1
WO2008095415A1 PCT/CN2008/000279 CN2008000279W WO2008095415A1 WO 2008095415 A1 WO2008095415 A1 WO 2008095415A1 CN 2008000279 W CN2008000279 W CN 2008000279W WO 2008095415 A1 WO2008095415 A1 WO 2008095415A1
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WO
WIPO (PCT)
Prior art keywords
cover
tamper
mask
transformer
type current
Prior art date
Application number
PCT/CN2008/000279
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English (en)
Chinese (zh)
Inventor
Jiasheng Wan
Original Assignee
Hubei Shengjia Electrical Apparatus Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hubei Shengjia Electrical Apparatus Ltd. filed Critical Hubei Shengjia Electrical Apparatus Ltd.
Publication of WO2008095415A1 publication Critical patent/WO2008095415A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/24—Voltage transformers

Definitions

  • the present invention relates to the field of power transformers, and in particular to a feedthrough type anti-tamper current transformer. Background technique ,
  • the thief often takes the method of removing or cutting the wire, so that the voltage signal can not enter the electric energy meter.
  • Some stealers take a more concealed method of stealing electricity by loosening the connection point between the voltage line and the bus bar, or at the connection point and the bus bar. The way in which the connection is inserted into an insulating object reduces the voltage measurement and thus the electricity is stolen;
  • the current transformer is usually used together with the watt-hour meter.
  • the metering of a meter is mainly determined by the product of the three factors of voltage, current and power factor and time. Therefore, changing any of the three elements can make the energy meter slow, stop, or even reverse, thus achieving the purpose of stealing electricity.
  • the built-in voltage-carrying current-carrying current transformer has no design to prevent human power stealing, and there is a problem that is not conducive to the management of the power management department.
  • the nut can be loosened to increase the gap between the primary line and the voltage-receiving component; Tightening the nut, injecting a transparent insulating layer between the primary line and the voltage-receiving part, is very concealed.
  • the principle is to reduce the voltage of the meter into the meter, to achieve the purpose of less metering and artificial stealing, and seriously infringe the country. Benefits, but also endanger the security of the grid.
  • the metrology department In order to prevent the criminals from stealing electricity through the above methods, the metrology department often seals the current transformer in a metering box, but since the three-way incoming line needs to be connected to the current transformer separately, it needs to be able to accommodate at least three current mutual inductances when sealing.
  • the box of the device which makes the metering box large in size and is not conducive to storage and on-site management. Summary of the invention
  • the core-type current transformer of the anti-tampering mask comprises a transformer body having a through hole, a voltage taking component disposed on the transformer body; at least one voltage output terminal, Electrical connection of the voltage taking component, wherein the voltage taking component is disposed on one side of the through hole, and moves along the through hole and moves through the through hole Direct contact of the conductor to obtain a voltage signal;
  • the transformer body is provided with a metal insert, and the metal insert is electrically connected to the voltage output terminal, and is disposed around the surface of the transformer body around the through hole.
  • the voltage taking component is a metal stud, which is screwed with the metal insert, and directly The conductor surface is in direct contact; the other is that the metal insert is screwed to the metal stud, and the voltage taking part is fixedly disposed at the front end of the metal stud, and the voltage taking part has a a spiked front end for penetrating the insulating skin with the insulating conductor to directly contact the inner conductive core; wherein the first type further includes a nut which is sleeved on the exposed cylindrical conductor The side surface of the nut is provided with a hole, and the hole is provided with an internal thread matched with the front end of the metal stud; for the purpose of preventing electric theft, the metal stud and the mutual inductance The relative positions of the bodies are fixed by lead seals;
  • it may also include an anti-tampering mask with a primary threading hole in the middle, and the anti-tampering mask is connected to the surface of the transformer body by a non-removable manner.
  • the current transformer of the present invention has a simple voltage mode and is not easy to steal electricity, and is safe to operate. It can be placed on a transformer conductive rod, wire or metal row outside the metering box. On the above, it is also possible to directly take the voltage on the busbar with insulation skin; the connection is stable, and the voltage is accurate and reliable, so it is advantageous for popularization and application.
  • the transformer body is first put on the primary line; then the connection of the voltage-receiving component and the fixing operation of the transformer body are performed; finally, the anti-tamper mask is fixed on the surface of the transformer body.
  • the invention can effectively prevent the occurrence of the tampering behavior by reducing the voltage of the watt-hour meter; technically completely suppressing the voltage reduction of the watt-hour meter, thereby avoiding the problem of causing the power shortage. It has the advantages of simple structure, low cost and reliable operation. It does not require a large-scale anti-tamper meter box, which is convenient for installation, wiring and management, and has broad application prospects.
  • DRAWINGS 1 is a schematic view showing the overall structure of a wire installed in the present invention
  • Figure 2 is a structural exploded view of a third embodiment
  • Figure 3 is a partial cross-sectional view taken along line A-A of Figure 2;
  • Figure 4 is a B-direction view of Figure 1;
  • Figure 5 is a schematic view showing the structure of a transformer equipped with a metal row
  • Figure 6 is a schematic structural view of a transformer equipped with a transformer guide rod
  • Figure 7 is an exploded view of the structure of the second embodiment
  • FIG. 8 is a schematic overall structural view of a fourth embodiment
  • Figure 9 is a partial cross-sectional structural view of Figure 8.
  • Figure 10 is a partial cross-sectional structural view of a bellows 7 according to a fourth embodiment
  • Figure 1 is a partial cross-sectional structural view of a fifth embodiment
  • Figure 12 is a partial cross-sectional structural view showing the tip end of the voltage-stamping metal stud 7 according to the fifth embodiment
  • Figure 13 is a perspective view of the secondary terminal anti-tamper cover 3;
  • Fig. 14 is an enlarged view of a portion B of Fig. 12; detailed description
  • the present embodiment is characterized in that the through-type current transformer with an anti-tamper mask for facilitating voltage taking according to the present invention is built-in.
  • the transformer body 1 is provided with a voltage taking component 10 electrically connected to the voltage line outlet end, and the voltage taking component 10 is disposed on one side of the through hole 1-8 of the transformer body 1, There may be more than one, and the voltage component 10 may be moved radially along the through hole 1-8.
  • the voltage component 10 is disposed on one side of the through hole 1-8 to prevent the voltage component from occupying the inner space of the through hole 1-8 and affecting the use of the transformer. At the same time, the voltage component is radially along the through hole. The movement can adapt the transformer of this structure to the needs of bus bars of different inner diameters and different cross-section shapes, thus increasing the adaptability of the transformer.
  • the voltage taking component is a metal stud 10 a which is screwed with the metal insert 9 and directly Directly contacting the surface of the exposed conductor; as shown in FIG. 11 , it further includes a nut 1 - 9 which is sleeved on the exposed cylindrical conductor, and the side of the nut 1 - 9 is provided with a hole (shown in the figure), the hole is provided with an internal thread matched with the front end of the metal stud 10 a, so that the metal stud is 10 a is screwed into the inside to form a connection, and the metal insert 9 is electrically connected to the voltage output terminal 2. As shown in Figure 3, Figure 11 and Figure 12.
  • the metal stud 10 a and the transformer body 1 are relatively fixed by the lead seal 15 , as shown in FIG. 4 ; to prevent the thief from rotating or disengaging from the bus bar by rotating the metal stud 10 a
  • other purposes such as welding, rivets, etc. can also be used to achieve the purpose of prohibiting the rotation of the stud, and are also within the scope of protection of the present invention.
  • the wire between the metal insert 9 and the voltage output terminal 2 is molded into the casing of the penetrating hole 1 -8 side of the transformer body 1.
  • the metal insert 9 can be fixed to the mutual inductance.
  • the body 1 is then connected to the voltage output terminal 2 through a wire.
  • the metal insert 9 and the conductor 12 are integrally formed, and the other end of the conductor 12 is directly connected to the voltage output terminal. 2; the conductor 12 can be processed into a circular ring shape, a semicircular shape, or can be processed into a rectangular or concave sheet shape as needed, and the conductor 12 of the sheet structure is disposed above the transformer coil 13 and insulated.
  • the layer 14 is spaced apart from the transformer coil 13 and the transformer housing is cast outside.
  • the structure has the obvious advantages that the metal studs 10 a and the metal inserts 9 are all disposed on the transformer housing, they do not occupy the inner space of the central hole of the transformer, and thus do not affect the winding diameter of the coil, and the mutual inductance is ensured.
  • the body body 1 has a small volume and saves installation space.
  • the transformer of this structure also has many advantages such as short voltage signal transmission distance, simple structure, and few connection points are not easy to be disconnected.
  • a more preferable structure is that a metal insert 9 is provided on each side of the threading hole of the transformer body 1, and two metal inserts are electrically connected, each The metal studs are threadedly connected to the metal studs 10, so that the voltage-carrying components in both directions act on the bus bars at the same time, so that the electrical connections are more stable and accurate, so that the voltage signals on the bus bars are better transmitted.
  • a voltage-receiving member having a spiked front end may be fixed to the front end of the voltage-cored metal stud 7 on the transformer body 1, as shown in Figs. 12 and 14.
  • the structural design of the voltage terminal can be applied to a wire with an insulating sheath, and the tip end of the spike can pierce the insulating sheath of the wire, and electrically connect the built-in voltage component to the wire of the wire to realize the voltage signal of the wire. extract.
  • the spiked front end of the voltage taking component may be a set of front ends having a needle-like or zigzag structure, it being understood that the front end consisting of a needle-like or serrated structure has a shape It is not limited.
  • a semi-circular shape composed of needle tips or serrations of different lengths can be well contacted with circular wires to ensure the effect of voltage taking.
  • different voltage-receiving components can be set for wires of different shapes.
  • the shape of the front end shape is as long as the needle tip or the sawtooth of the voltage taking component can be pierced to take the voltage from the wire insulation sheath.
  • an anti-tamper mask can be disposed outside the transformer body.
  • the embodiment is constructed by the transformer body 1 and fixed on the surface of the transformer body 1.
  • the tamper-proof mask 2 is provided with a primary threading hole 2 - 1 in the middle of the tamper-proof mask 2; the tamper-proof mask 2 is connected to the surface of the transformer body 1 by a non-detachable manner;
  • the anti-tampering mask 2 is provided with a latching member 2-2, and the transformer body 1 is provided with a card interface 1-1 adapted to the latching member 2-2, and the anti-tampering mask 2, the card connector 2-2 is inserted into the card interface 1 - 1 on the transformer body 1 to realize the card connection.
  • the clip 2-2 and the card interface 1- 1 of the present embodiment are not limited to one side as shown in FIG. 2, and may be set to any number according to actual needs. It will be appreciated that the greater the number of clips 2-2 and card interfaces 1-1, the stronger the connection. Of course, it may also be the case that the transformer body 1 is provided with a latching member, and the anti-tampering mask 2 is provided with a card interface adapted to the latching member.
  • the shape of the primary threading hole 2 - 1 may be determined according to the sectional shape of the primary line; for example, for the metal row, the shape of the primary threading hole 2 - 1 may be designed to be a sectional shape with the metal row Corresponding rectangle; For a cylindrical primary line, the shape of the primary threading hole 2-1 may be designed to be circular.
  • the shape of the primary threading hole 2-1 may also be designed to have a shape in which a rectangle and a circle coincide, as shown in FIG. In this way, the penetrating transformer of the same type can be used for the metal row, as shown in Fig. 5; it can also be used for the circular column of the transformer guide rod, as shown in Fig. 6.
  • the anti-tampering masks 2 may be two, which are respectively fixedly disposed on the end faces of the two sides of the threading holes of the transformer body 1.
  • the sides of the transformer body 1 are protected against tampering, and are mainly used in the use of a metering box or a metal row.
  • the embodiment is different from the above-described embodiment in that the anti-tamper mask 2 includes a first cover 21 and a second cover 22 , and the cover 21 is provided with a clip. 21 -1, the second cover 22 is provided with a card interface 22-1 adapted to the clip 21-1; the clip 21-1 of the first cover 21 is inserted into the second cover The card interface 22-1 implements a card connection.
  • the number of the engaging members 21-1 on the first cover 21 of the present embodiment may be two, and are respectively disposed on both sides of the first cover 21, as shown in FIG. 7; of course, the engaging member 21-1
  • the number and position of the cover 21 can also be set to other positions on the first cover 21.
  • the second cover 22 is provided with a snap member, and the card interface is provided at a corresponding position on the first cover 2 1 .
  • connection between the first cover 21 and the second cover 22 can also be in other forms, such as pouring or gluing, as long as the non-detachable connection can be achieved and destructive treatment is required.
  • the case of opening is within the scope of protection of this patent.
  • the first cover 21 is provided with a number of convex connecting portions and/or recessed connecting portions 21-2
  • the second cover 22 is provided with a second protruding connecting portion and/or a recessed portion
  • the connecting portion 22-2; the corresponding portion of the transformer body 1 and the first cover body 21 and the second cover body 22 are respectively provided with a first convex connection portion and/or a concave connection portion 21- a connecting portion and/or a protruding connecting portion 1-2 adapted to the 2nd and 2nd convex connecting portions and/or the IHJ connecting connecting portion 22-2, and the first convex joint on the first cover 21
  • the partial and/or recessed connecting portion 21-2 and the second raised connecting portion and/or the incoming connecting portion 22-2 on the second cover 22 and the recessed connecting portion on the transformer body 1 and/or Or the convex connection portion 1-2 is fixedly connected by means of an embedded connection; the first cover body 21 and the second cover body 22 are respectively provided with a flange portion 21-3 and a
  • the cross-sectional shape of the protruding connecting portion and/or the recessed connecting portion is a shape that is small and large, so that the first cover 21 and the second cover 22 can be fixedly connected to the transformer body 1 respectively;
  • the first cover 21 and the second cover 22 are respectively inserted from both sides of the transformer body 1.
  • the first flange 21 is The -3 and the 2nd flanges 22-3 are respectively clamped on the housing of the transformer body 1, further restricting the relative movement between the cover body and the transformer body 1, and passing the card and the card
  • the interface is fixedly connected and integrated with the transformer body 1 to form a non-detachable connection.
  • the depth and length of the raised connecting portion and/or the protruding connecting portion may be designed according to actual needs or according to the thickness of the housing of the transformer body 1.
  • the cross-sectional shape of the convex connecting portion and/or the EJ connecting portion of the present invention may also be designed according to actual needs; preferably, it may be a dovetail shape, an inverted " ⁇ " shape or an "L” shape.
  • the cross-sectional shape is not limited to the above three types, and it is within the protection scope of the patent as long as it satisfies the use requirements.
  • the anti-tamper mask 2 of the present invention is made of a transparent material, for example, a transparent engineering plastic. Due to the long-term use, the connection between the voltage component and the primary line may be loosened. In particular, for outdoor use, the loosening phenomenon is more likely to occur, thereby affecting the accuracy of the measurement. Therefore, the maintenance personnel pass through the transparent The cover monitors the connection between the voltage components and the primary line and maintains them in a timely manner to minimize natural losses.
  • the two sides of the transformer body 1 are protected against tampering, and the first cover 2 1 and the second cover 22 are also described in this embodiment. They can be respectively two and fixedly disposed on both sides of the transformer body 1, as shown in Fig. 2.
  • the embodiment is characterized in that the secondary terminal of the transformer body 1 is fixedly provided with a secondary terminal anti-tamper cover 3, and the other end of the secondary terminal anti-tamper cover 3 has a trace
  • the hole 3-1 as shown in FIG. 2, specifically, the secondary terminal anti-tampering cover 3 is provided with a latching member 3-2, and the transformer body 1 is provided with a latching member 3 - 2 adapted card interface 1 - 4, the card connector 3-2 on the secondary terminal anti-tamper cover 3 is inserted into the card interface 1-4 on the transformer body 1 to achieve a snap connection.
  • the secondary terminal anti-spyware cover 3 includes a first cover 31 and a second cover 32.
  • the cover 31 is provided with a snap member 31-1
  • the cover 32 is provided with a card interface 32-1 adapted to the clip 31-1; the clip 31-1 of the first cover 31 is inserted into the card interface 32 of the second cover-
  • a card-joining connection is implemented in the first embodiment;
  • the outer surface of the secondary terminal of the transformer body 1 is provided with a protrusion 1-3, and the inner wall of the first-piece cover body 3 1 and the second-piece cover body 32 are respectively provided with
  • the first groove 31-2 and the second groove 32-2 are matched with the protrusions 1-3, and the first groove 31-2 and the second groove 32-2 are respectively attached to the protrusion 1- 3 on.
  • the projections 1-3 are annular projections.
  • the number of the engaging members 31-1 on the first cover 31 of the present embodiment may be two, and are respectively disposed on both sides of the first cover 31 (as shown in FIG. 7); of course, the engaging member 31- The number and location of 1 can also be determined according to actual needs. Further, it may be the case that the second cover 32 is provided with a snap member, and the card interface is provided at a corresponding position on the first cover 31.
  • connection between the first cover 31 and the second cover 32 may be in other forms, as long as it is non-detachable and can be opened by destructive treatment, and is within the scope of protection of this patent.
  • first cover 31 or the second cover 32 is provided with a cable holder 34 and a crimping block 33 for use with the cable holder 34, and the crimping block 33 is fixedly connected to the cable holder by screws.
  • the cable holder 34 can also be a U-shaped clip as long as it can function as a fixed cable.
  • the wire hole 3-1 on the secondary terminal anti-spying cover 3 is connected with the bellows 5 through the box connector 4, as shown in FIG. 4 and FIG. 7, the inner diameter of the wire hole 3-1
  • the size is adapted to the outer diameter of the connecting portion 4 - 1 of the cartridge joint 4, and the connecting portion 4 - 1 of the cartridge joint 4 is fitted in the wiring hole 2 - 1 of the secondary terminal anti-tampering mask 2 and The connection is fastened by the nut of the cartridge joint 4.
  • the bellows 5 can further protect the inner core wire for the purpose of preventing electricity theft.
  • the secondary terminal anti-spying cover 3 can also be made of transparent material, for example, Transparent engineering plastics.
  • the secondary terminal of the transformer body 1 is fixed, and the secondary terminal can be tamper-proof.
  • the cover body 32 or 31 is integrally molded with the cable, and the anti-tampering purpose of the present invention can be better achieved; of course, it is also conceivable that after the bellows 5 and the box joint 4 which are set outside the cable are assembled, the same can be done twice.
  • the terminal anti-spying cover 3 is cast into one body, and therefore should be within the scope of the present invention.
  • the cable 6 is electrically connected to the internal terminal of the transformer body 1 at one end; the outer sheath and the secondary terminal of the cable 6 are externally connected.
  • the housing of the transformer body 1 is cast in one piece.
  • it also comprises a bellows 7 which is fitted over the outside of the cable 6, which bellula 7 is also cast integrally with the housing of the transformer body 1 of the secondary terminal.
  • the cable 6 of the present embodiment is a multi-core cable to accommodate different types of high and low voltage current transformers.
  • the insulating sheath of the cable 6 of the present embodiment is integrally molded with the housing of the transformer body 1.
  • the current contacts and the voltage contacts are disposed in the housing of the transformer body 1, replacing the backward lead seal, and is particularly suitable for determining In the project of cable length, it can be protected from moisture, water and electricity. It has the advantages of reasonable structure, reliability, convenient construction and low cost.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

La présente invention concerne un transformateur de courant de type à noyau troué avec un voile antivol pour détecter facilement la tension. Il comprend un corps de transformateur (1) qui dispose d'un trou traversant le noyau (1-8), un composant de détection de tension (10) monté dans ledit corps de transformateur (1), au moins une borne de sortie de tension (2) qui est électriquement branchée sur ledit composant de détection de tension (10). Ce composant de détection de tension (10) qui est installé d'un côté du trou traversant le noyau (1-8), est directement en contact avec un conducteur (12) qui traverse le trou traversant le noyau (1-8) de façon à détecter le signal de tension.
PCT/CN2008/000279 2007-02-02 2008-02-02 Transformateur de courant de type à noyau troué avec un voile antivol pour détecter facilement la tension WO2008095415A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710051463.0 2007-02-02
CN2007100514630A CN101034099B (zh) 2007-02-02 2007-02-02 带防窃电面罩的穿心式电流互感器

Publications (1)

Publication Number Publication Date
WO2008095415A1 true WO2008095415A1 (fr) 2008-08-14

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CN (1) CN101034099B (fr)
WO (1) WO2008095415A1 (fr)

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DE202009010820U1 (de) * 2009-08-11 2010-09-30 Mbs Ag Messwandler
US20100315066A1 (en) * 2007-12-07 2010-12-16 Yazaki Corporation Current sensor
CN110299673A (zh) * 2019-07-12 2019-10-01 江苏华鹏变压器有限公司 高压开关柜

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CN101034099B (zh) * 2007-02-02 2011-05-25 湖北盛佳电器设备有限公司 带防窃电面罩的穿心式电流互感器
JP2013088349A (ja) * 2011-10-20 2013-05-13 Alps Green Devices Co Ltd 電流センサ
CN104166074B (zh) * 2014-08-07 2017-04-12 上海萌烨电力科技有限公司 输电线路电流数据采集装置
CN109342792B (zh) * 2018-11-10 2020-12-22 国网山东省电力公司烟台供电公司 一种移动式高压电力计量箱
CN111948448A (zh) * 2020-08-20 2020-11-17 国网河北省电力有限公司沧州供电分公司 基于专家知识库的反窃电***
CN115938721B (zh) * 2022-12-16 2023-09-05 佛山市盛晖智科电气有限公司 一种防窃电互感器

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US5426360A (en) * 1994-02-17 1995-06-20 Niagara Mohawk Power Corporation Secondary electrical power line parameter monitoring apparatus and system
CN2425415Y (zh) * 2000-04-14 2001-03-28 万家盛 互感线圈二次防窃电封罩
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US20100315066A1 (en) * 2007-12-07 2010-12-16 Yazaki Corporation Current sensor
US8917085B2 (en) * 2007-12-07 2014-12-23 Yazaki Corporation Current sensor
DE202009010820U1 (de) * 2009-08-11 2010-09-30 Mbs Ag Messwandler
CN110299673A (zh) * 2019-07-12 2019-10-01 江苏华鹏变压器有限公司 高压开关柜

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