CN213181731U - Current transformer and electricity stealing protection system - Google Patents
Current transformer and electricity stealing protection system Download PDFInfo
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- CN213181731U CN213181731U CN202020675735.5U CN202020675735U CN213181731U CN 213181731 U CN213181731 U CN 213181731U CN 202020675735 U CN202020675735 U CN 202020675735U CN 213181731 U CN213181731 U CN 213181731U
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Abstract
The utility model discloses a current transformer and an electricity stealing protection system, wherein, the shunt metering transformer body is packaged into a whole by the circuit transformer, the volume of the current transformer can be effectively reduced, and the shunt metering transformer is suitable for being installed in a narrow space of a metering box; the interface of the secondary side adopts an 8-core RJ45 crystal head, so that the plugging and the pulling are convenient, the contact is firm, the reliability is high, and the installation convenience and the installation efficiency are improved; the current transformer is filled with an insulator, so that the current transformer can play an insulating role, and the withstand voltage level reaches 5000V; the shell is made of black PBT material, and has insulating and flame-retardant effects; the sampling work of four paths of current can be completed simultaneously. Additionally, the utility model discloses an electricity-stealing protection system can accomplish the sampling work of four ways electric current simultaneously, and the electric current of monitoring electric energy meter inlet wire end is compared through the electric current of gathering with the electric energy meter, reaches the anti-electricity-theft purpose, has reduced manpower and material resources in the aspect of the electricity-stealing protection effectively.
Description
Technical Field
The utility model relates to an electric power measurement technical field to more specifically, relate to a current transformer and steal electric protection system.
Background
With the continuous progress of the power industry and the popularization and application of power, the phenomenon that lawbreakers steal power by illegal means is more and more serious. At present, the electricity stealing protection is mainly implemented by methods of regular inspection by workers, regular verification of an ammeter, user reporting and the like, on one hand, the method has stronger dependence on the workers, and the site of stealing and missing inspection is difficult to obtain evidence after abnormality is found; on the other hand, the problems of heavy work, low efficiency, high cost, slow reaction, easy operation irregularity or careless omission and the like exist in manual inspection and operation and maintenance, and the management and management requirements of large-scale electricity stealing protection are difficult to deal with. In addition, the power company has no knowledge and judgment about the conditions of the circuit state in the box, the operation environment of the metering device and the like, and how to effectively perform the metering side electricity stealing prevention is also becoming a big problem in the electric energy quality management.
The existing current transformer can only measure one current, and for a three-phase four-wire electric energy meter, four transformers are needed to obtain current data. However, the measuring tank has a small space. The current transformer needs to be developed towards the direction of miniaturization, high integration level, stronger anti-interference capability and wider frequency band. Therefore, how to design a small-sized current transformer and apply the current transformer to the electricity stealing prevention is an urgent problem to be solved.
Disclosure of Invention
In order to solve the problem, the utility model provides a volume is littleer, the integrated level is high and the convenient current transformer of wiring and steal electric protection system.
In order to solve the above problem, according to an aspect of the present invention, there is provided a current transformer, the current transformer including: the four-branch metering mutual inductor comprises four branch metering mutual inductor bodies which are respectively used for measuring currents of an A line, a B line, a C line and an N line of a three-phase four-line electric energy meter, the four branch metering mutual inductor bodies are packaged in a shell, any two branch metering mutual inductor bodies are arranged at intervals, and the shell is provided with an insulator in a gap between the branch metering mutual inductor bodies and/or in a gap between the branch metering mutual inductor bodies.
Preferably, the four shunt metering transformer bodies are divided into two pairs arranged side by side in the width direction of the housing, and any one pair is arranged side by side and at intervals in the length direction of the housing.
Preferably, the four shunt metering transformer bodies are arranged in a parallelogram.
Preferably, the four shunt metering transformer bodies are arranged in a diamond or square shape.
Preferably, the four shunt metering transformer bodies are arranged side by side and at intervals in sequence along the length direction of the shell.
Preferably, the housing is a PBT material for insulation and flame retardant.
Preferably, the secondary side of the current transformer is output in a flat wire mode, and an 8-core RJ45 crystal plug is adopted as an interface.
Preferably, wherein the housing comprises: the shell and the cover are detachably connected.
Preferably, wherein the housing and cover are snap-fit connected.
According to another aspect of the utility model, a steal electric protection system is provided, its characterized in that, it includes to steal electric protection system: according to the current transformer and the monitoring module, the monitored module is used for comparing first current data of an electric energy meter incoming line side in the metering box collected by the current transformer with second current data collected by the electric energy meter so as to obtain a current difference value, and electricity stealing protection is carried out according to the current difference value.
Compared with the prior art, the utility model has the advantages of: the shunt metering transformer body is packaged into a whole, so that the volume of the current transformer can be effectively reduced, and the shunt metering transformer is suitable for being installed in a narrow space of a metering box; the interface of the secondary side adopts an 8-core RJ45 crystal head, so that the plugging and the pulling are convenient, the contact is firm, the reliability is high, and the installation convenience and the installation efficiency are improved; the current transformer is filled with an insulator, so that the current transformer can play an insulating role, and the withstand voltage level reaches 5000V; the shell is made of black PBT material, and has insulating and flame-retardant effects; the sampling work of four paths of current can be completed simultaneously. Additionally, the utility model discloses an electricity-stealing protection system can accomplish the sampling work of four ways electric current simultaneously, and the electric current of monitoring electric energy meter inlet wire end is compared through the electric current of gathering with the electric energy meter, reaches the anti-electricity-theft purpose, has reduced manpower and material resources in the aspect of the electricity-stealing protection effectively.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings:
fig. 1 is a schematic diagram of a current transformer according to an embodiment of the present invention;
fig. 2 is a top view of a current transformer according to an embodiment of the present invention;
fig. 3 is a front view of a current transformer according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electricity stealing prevention system according to an embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of thoroughly and completely disclosing the present invention and fully conveying the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a schematic diagram of a current transformer according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a current transformer, including: the four-branch metering mutual inductor comprises four branch metering mutual inductor bodies A, B, C and N which are respectively used for measuring currents of an A line, a B line, a C line and an N line of a three-phase four-line electric energy meter, the four branch metering mutual inductor bodies are packaged in a shell, any two branch metering mutual inductor bodies are arranged at intervals, and gaps between the shell and the branch metering mutual inductor bodies and/or any two branch metering mutual inductor bodies are provided with insulators.
As shown in fig. 1, the current transformer according to the embodiment of the present invention includes: the shunt metering transformer comprises shunt metering transformer bodies A, B, C and N, wherein primary side input terminals of each shunt metering transformer are P1-P2, and secondary side output terminals of each shunt metering transformer are S1 and S2; the ends with the same name are: p1 is the same name as terminals S1(1), S1(3), S1(5), and S (7). Each shunt metering transformer body may be a feedthrough circuit transformer.
Fig. 2 is a top view of a current transformer according to an embodiment of the present invention. As shown in fig. 2, the terminal P1 is the incoming terminal of the primary side, the terminal P2 is the outgoing terminal of the primary side, and the direction of current passing through the transformer is P1 to P2. The current transformer is compatible with single-phase current sampling and three-phase current sampling.
Preferably, the four shunt metering transformer bodies are divided into two pairs arranged side by side in the width direction of the housing, and any one pair is arranged side by side and at intervals in the length direction of the housing.
Preferably, the four shunt metering transformer bodies are arranged in a parallelogram.
Preferably, the four shunt metering transformer bodies are arranged in a diamond or square shape.
Fig. 3 is a front view of a current transformer according to an embodiment of the present invention. As shown in fig. 3, the four shunt metering transformer bodies A, B, C and N are divided into two pairs (a and C), (B and N), and the two pairs of shunt metering transformer bodies are arranged side by side in the width direction of the enclosure. The shunt metering mutual inductor bodies A and C are positioned on the upper layer along the width direction, and the shunt metering mutual inductor bodies A and C are arranged side by side and at intervals along the length direction; the shunt metering mutual inductor bodies B and N are located on the lower layer along the width direction, and the shunt metering mutual inductor bodies B and N are arranged side by side and at intervals along the length direction. The current line passes through the transformer in the following mode: for three-phase four-wire, A, B, C, N four-wire corresponds to four holes through current transformers A, B, C and N, respectively, with the direction of current flow being indicated by the arrows as shown in fig. 2.
To reduce bulk and aesthetics, the four shunt metering transformers A, B, C and N are arranged in a parallelogram. The special parallelogram is arranged in a rhombic or square shape.
In the embodiment of the present invention, the four shunt measurement transformer bodies A, B, C and N are grouped in multiple ways, and are not limited to (a and C), (B and N). And the arrangement mode, the distance and the like of the four shunt metering transformers can be set in a user-defined mode according to the requirements.
In the embodiment of the utility model, the shell with gap and/or arbitrary two between the measurement mutual-inductor body A, B, C and N along separate routes between the measurement mutual-inductor body along separate routes are equipped with the insulator. The current transformer bodies are filled with epoxy resin, and the insulation grade can reach 5000V. In addition, in order to better fix the positions of the four shunt metering transformers, an insulating support plate can be arranged below the shunt metering transformers.
Preferably, the four shunt metering transformer bodies are arranged side by side and at intervals in sequence along the length direction of the shell.
According to the utility model discloses a further embodiment, can follow four along measurement mutual-inductor bodies A, B, C and N along the length direction of shell is in proper order side by side and the interval sets up. For example A, B, C and N in sequence from left to right along the length of the housing. The gaps between the shell and the shunt metering transformer bodies A, B, C and N and/or the gap between any two shunt metering transformer bodies are provided with an insulator. The current transformer bodies are filled with epoxy resin, and the insulation grade can reach 5000V. In addition, in order to better fix the positions of the four shunt metering transformers, an insulating support plate can be arranged below the shunt metering transformers.
Preferably, the housing is a PBT material for insulation and flame retardant.
Preferably, the secondary side of the current transformer is output in a flat wire mode, and an 8-core RJ45 crystal plug is adopted as an interface.
Preferably, wherein the housing comprises: the shell and the cover are detachably connected.
Preferably, wherein the housing and cover are snap-fit connected.
The utility model discloses embodiment's current transformer's shell adopts black PBT material, has insulating flame retardant action. The housing includes: the shell and the cover are detachably connected. The shell and the cover body are connected in a buckling mode. The cover may be the same surface as the front view shown in fig. 3, or may be the same surface as the plan view shown in fig. 2. Still be equipped with the mounting panel on the shell for fix the current transformer installation in the batch meter. The secondary side current wire adopts the form of black flat line, and the interface adopts 8 core RJ45 crystal heads, and the plug is convenient, and the contact is firm, and the reliability is high. The rated input current of the current transformer is as follows: 100A, rated ratio difference is less than or equal to +/-0.1%, and the linear range is as follows: 5% I n-120% I n, linearity error of 0.1L.
The circuit transformer of the embodiment of the utility model encapsulates the four shunt metering transformer bodies into a whole, can effectively reduce the volume of the current transformer, and is suitable for being installed in a narrow space of a metering box; the plugging and pulling are convenient, the contact is firm, the reliability is high, and the installation convenience and the installation efficiency are improved; the current transformer is filled with an insulator, so that the current transformer can play an insulating role, and the withstand voltage level reaches 5000V; the sampling work of four-path current can be simultaneously completed, the sampling device is applied to an electricity stealing protection system, and manpower and material resources in the aspect of electricity stealing protection can be effectively reduced.
Fig. 4 is a schematic structural diagram of an electricity stealing prevention system according to an embodiment of the present invention. As shown in fig. 4, the embodiment of the present invention provides an electricity stealing prevention system, including: any of the current transformers 401 and monitoring modules 402 described above. Preferably, the monitoring module 102 is configured to compare first current data collected by the current transformer 401 at the incoming line side of the electric energy meter in the metering box with second current data collected by the electric energy meter to obtain a current difference value, and perform electricity stealing protection according to the current difference value.
In an embodiment of the present invention, the electricity stealing prevention system comprises: the current transformer and the monitoring module. The using method of the current transformer comprises the steps that the current transformer collects first current data of an electric energy meter incoming line side in the metering box and uploads the first current data to a monitoring module in the metering box, the first current data and second current data collected by the electric energy meter are compared, and when a current difference value between the first current data and the second current data exceeds a certain threshold value, an alarm is given.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the above disclosed are equally possible within the scope of the invention, as would be apparent to a person skilled in the art, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ means, unit, etc. ]" are to be interpreted openly as referring to at least one instance of said means, unit, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.
Claims (10)
1. A current transformer, characterized in that the current transformer comprises: the four-branch metering mutual inductor comprises four branch metering mutual inductor bodies which are respectively used for measuring currents of an A line, a B line, a C line and an N line of a three-phase four-line electric energy meter, the four branch metering mutual inductor bodies are packaged in a shell, any two branch metering mutual inductor bodies are arranged at intervals, and the shell is provided with an insulator in a gap between the branch metering mutual inductor bodies and/or in a gap between the branch metering mutual inductor bodies.
2. The current transformer of claim 1, wherein the four shunt metering transformer bodies are divided into two pairs arranged side by side in a width direction of the enclosure, and any one pair is arranged side by side and spaced apart in a length direction of the enclosure.
3. The current transformer of claim 2, wherein the four shunt metering transformer bodies are arranged in a parallelogram.
4. The current transformer of claim 2, wherein the four shunt metering transformer bodies are arranged in a diamond or square configuration.
5. The current transformer of claim 1, wherein the four shunt metering transformer bodies are sequentially arranged side-by-side and spaced apart along a length of the enclosure.
6. The current transformer of claim 1, wherein the housing is a PBT material for insulation and flame retardant.
7. The current transformer of claim 1, wherein the secondary side of the current transformer is output by means of a flat wire, and an interface is an 8-core RJ45 crystal plug.
8. The current transformer of claim 1, wherein the enclosure comprises: the shell and the cover are detachably connected.
9. The current transformer of claim 8, wherein the housing and cover are snap-fit connected.
10. An electricity theft prevention system, characterized in that it comprises: the current transformer and monitoring module of any one of claims 1-9, wherein the monitoring module is configured to compare first current data collected by the current transformer at a wire inlet side of an electric energy meter in a metering box with second current data collected by the electric energy meter to obtain a current difference value, and perform electricity stealing protection according to the current difference value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020675735.5U CN213181731U (en) | 2020-04-28 | 2020-04-28 | Current transformer and electricity stealing protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020675735.5U CN213181731U (en) | 2020-04-28 | 2020-04-28 | Current transformer and electricity stealing protection system |
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| Publication Number | Publication Date |
|---|---|
| CN213181731U true CN213181731U (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020675735.5U Active CN213181731U (en) | 2020-04-28 | 2020-04-28 | Current transformer and electricity stealing protection system |
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| Country | Link |
|---|---|
| CN (1) | CN213181731U (en) |
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- 2020-04-28 CN CN202020675735.5U patent/CN213181731U/en active Active
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