All-insulation outdoor electricity larceny prevention device
By setting up a combined current transformer inside the meter box and installing it on the low-voltage outlet of the transformer, combined with strict sealing measures, the problem of the existing meter box lacking anti-powered power stolen functions is solved, and the effect of effectively preventing power stolen, reducing costs and reducing volume is achieved.
Patent Information
- Application Number
- CN202510271009.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2025-06-06
AI Technical Summary
The existing meter boxes lack the anti-powered power stolen function, and their size is large and costly, making it difficult to effectively prevent users from stealing power in front of the meter.
A combined current transformer is installed inside the meter box and installed at the low-voltage outlet of the transformer. Combined with strict closure measures, users can prevent power from stealing power in front of the meter, and at the same time, they save the primary cable from the low-voltage side to the meter box.
By reducing the distance between the transformer inductor and the power supply, the power theft is completely eliminated, the cost is reduced, and the volume of the metering device is reduced.
Smart Images
Figure CN120102946A_ABST
Abstract
Description
Technical Field
[0001] The invention provides a fully-insulated outdoor anti-electricity-theft device, belonging to the technical field of fully-insulated outdoor anti-electricity-theft. Background Art
[0002] The meter boxes currently in use do not have an anti-electricity theft function. The electric energy output by the transformer inside the meter box will directly enter the household. Since there is a certain distance between the electricity collection end and the power supply, and the meter box is not closed, some users use the secondary current of the short-circuited current transformer and the undervoltage method to steal electricity in front of the meter at the low-voltage metering gateway; in addition, the electricity collection end of the meter box is still connected to the low-voltage side of the transformer with a primary cable, which will make the meter box large in size and high in cost. Summary of the invention
[0003] In order to overcome the deficiencies in the prior art, the present invention aims to solve the technical problem of providing an improved structure of a fully insulated outdoor anti-electricity theft device.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a fully insulated outdoor anti-electricity theft device, including a meter box provided with a transformer, the meter box is also provided with a combined mutual inductor, the combined mutual inductor is installed on the inner wall of the meter box through a fixed box body, a terminal box is provided inside the fixed box body, a three-phase connector and a zero-phase connector are provided on the top of the fixed box body, the three-phase connector and the zero-phase connector are both connected to one end of a corresponding waterproof cable, the other end of the waterproof cable connected to the three-phase connector is connected to a current transformer, the other end of the waterproof cable connected to the zero-phase connector is connected to a zero-phase casting body, and power copper bars are provided at the induction ends of the current transformer and the zero-phase casting body; A bracket for mounting the current transformer and the zero-phase casting body is also provided on one side of the fixed box body, and each current transformer and the zero-phase casting body can move on the bracket to adjust the distance between them; The power-taking copper bars of each current transformer and the zero-phase casting body are mounted on the porcelain bottles of the corresponding phase lines at the low-voltage outgoing terminal of the transformer.
[0005] Waterproof joint covers are arranged at the locations where the waterproof cable is connected to the three-phase joint, the zero-phase joint, the current transformer and the zero-phase casting body respectively.
[0006] A control circuit board is arranged inside the terminal box, and a signal receiving end of the control circuit board is connected to a three-phase connector and a zero-phase connector respectively; The signal output end of the control circuit board is connected to the monitoring server through a waterproof cable.
[0007] The beneficial effects of the present invention compared with the prior art are as follows: the present invention installs the combined current transformer at the corresponding position inside the meter box, moves the low-voltage metering gate forward, reduces the distance between the transformer sensing end and the power supply to zero limit, installs the combined current transformer at the low-voltage outlet bushing of the transformer, and takes strict sealing measures for the meter box, thereby completely eliminating the possibility of users stealing electricity in front of the meter; at the same time, the present invention directly covers the transformer on the low-voltage porcelain bottle of the transformer, eliminates the primary cable from the low-voltage side to the meter box, correspondingly reduces the cost, and reduces the volume of the entire metering device. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a structural schematic diagram of the fully insulated outdoor anti-electricity theft combined mutual inductor of the present invention; Figure 2 It is a schematic diagram of the circuit structure of the anti-electricity theft device of the present invention; Figure 3 It is a wiring diagram of the combined mutual inductor of the present invention; In the figure: 1 is a fixed box body, 2 is a terminal box, 11 is a three-phase connector, 12 is a zero-phase connector, 3 is a waterproof cable, 4 is a current transformer, 5 is a zero-phase casting body, 6 is a power busbar, 7 is a bracket, and 8 is a waterproof connector cover. DETAILED DESCRIPTION
[0009] like Figures 1 to 3 As shown, the fully insulated outdoor anti-electricity theft device provided by the present invention comprises a meter box provided with a transformer, wherein the meter box is further provided with a combined mutual inductor, wherein the combined mutual inductor is installed on the inner wall of the meter box through a fixed box body 1, wherein a terminal box 2 is provided inside the fixed box body 1, wherein a three-phase connector 11 and a zero-phase connector 12 are provided on the top of the fixed box body 1, wherein the three-phase connector 11 and the zero-phase connector 12 are both connected to one end of a corresponding waterproof cable 3, wherein the other end of the waterproof cable 3 connected to the three-phase connector 11 is connected to a current transformer 4, wherein the other end of the waterproof cable 3 connected to the zero-phase connector 12 is connected to a zero-phase casting body 5, and a power-taking copper bus 6 is provided at the induction ends of the current transformer 4 and the zero-phase casting body 5; A bracket 7 for mounting the current transformer 4 and the zero-phase casting 5 is also provided on one side of the fixed box body 1, and each current transformer 4 and the zero-phase casting 5 can move on the bracket 7 to adjust the distance between them; The power copper bar 6 of each current transformer 4 and the zero-phase casting body 5 is mounted on the porcelain bottle of the corresponding phase line of the low-voltage output terminal of the transformer.
[0010] Waterproof joint covers 8 are provided at the locations where the waterproof cable 3 is connected to the three-phase joint 11 , the zero-phase joint 12 , the current transformer 4 , and the zero-phase casting body 5 .
[0011] A control circuit board is arranged inside the terminal box 2, and a signal receiving end of the control circuit board is connected to the three-phase connector 11 and the zero-phase connector 12 respectively; The signal output end of the control circuit board is connected to the monitoring server via a waterproof cable 3 .
[0012] The present invention mainly provides an anti-electricity theft metering device for 10kV high-supply and low-meter special transformers. The device collects current by arranging a combined current transformer inside a meter box. The installed combined current transformer moves the low-voltage metering gate forward, so that the distance between the transformer sensing end and the power supply is reduced to zero limit. The combined current transformer in the meter box is arranged at the low-voltage outlet end of the transformer, that is, at the low-voltage outlet bushing of the transformer. At the same time, strict sealing measures are taken for the meter box to simplify the processing procedures for investigating and collecting evidence of electricity theft, improve the efficiency of investigating and handling electricity theft by large users of special transformers, so that electricity theft can be prohibited from the source, thereby completely eliminating the possibility of users stealing electricity in front of the meter. The present invention can be arranged for new and old transformer structures of different models, and the combined current transformer is installed at the corresponding position of the meter box.
[0013] Specifically, the anti-electricity theft device provided by the present invention improves the structure inside the meter box. The installed combined current transformer consists of three current transformers and a zero-phase cast body with the same appearance as the transformer. Each transformer and the zero-phase cast body are installed on an extension bracket, so that the distance between each transformer and the zero-phase cast body can be flexibly adjusted to adapt to the structure of unequal diameters of the three-phase low-voltage guide rods A, B, and C of the transformer zero-phase guide rod, and each transformer is directly mounted on the low-voltage porcelain bottle of the transformer. On the one hand, accidents caused by overheating of the connection point can be prevented. On the other hand, the metering transformer is located at the low-voltage outlet end of the transformer, which can effectively prevent users from bypassing the metering device to steal electricity. At the same time, since the transformer is directly mounted on the low-voltage porcelain bottle of the transformer, the primary cable from the low-voltage side to the meter box is omitted, which correspondingly reduces the cost and can reduce the volume of the entire metering device by 70%.
[0014] The transformer housing, junction box and transformer fastening cover used in the present invention are all made of outdoor new composite load insulating materials. All parts on the transformer can be used for a long time without maintenance under outdoor conditions of 0-50℃. The unique anti-electricity theft structure can effectively prevent electricity theft by bypassing the metering device, and is suitable for the metering of substation transformers and special transformers.
[0015] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A fully insulated outdoor anti-electricity theft device, comprising a meter box provided with a transformer, characterized in that: The meter box is also provided with a combined mutual inductor, which is installed on the inner wall of the meter box through a fixed box body (1). A terminal box (2) is provided inside the fixed box body (1). A three-phase connector (11) and a zero-phase connector (12) are provided on the top of the fixed box body (1). The three-phase connector (11) and the zero-phase connector (12) are both connected to one end of a corresponding waterproof cable (3). The other end of the waterproof cable (3) connected to the three-phase connector (11) is connected to the current mutual inductor (4). The other end of the waterproof cable (3) connected to the zero-phase connector (12) is connected to the zero-phase casting (5). Power copper bars (6) are provided at the induction ends of the current mutual inductor (4) and the zero-phase casting (5). A bracket (7) for mounting a current transformer (4) and a zero-phase casting (5) is also provided on one side of the fixed box body (1) and extends outward, and each current transformer (4) and zero-phase casting (5) can move on the bracket (7) to adjust the distance between them; The power supply copper bars (6) of each current transformer (4) and the zero-phase casting body (5) are mounted on the porcelain bottles of the corresponding phase lines at the low-voltage output terminal of the transformer.
2. A fully insulated outdoor anti-electricity theft device according to claim 1, characterized in that: Waterproof connector covers (8) are provided at the locations where the waterproof cable (3) is respectively connected to the three-phase connector (11), the zero-phase connector (12), the current transformer (4), and the zero-phase casting body (5).
3. A fully insulated outdoor anti-electricity theft device according to claim 1, characterized in that: A control circuit board is arranged inside the wiring terminal box (2), and a signal receiving end of the control circuit board is respectively connected to the three-phase connector (11) and the zero-phase connector (12); The signal output end of the control circuit board is connected to the monitoring server via a waterproof cable (3).