Label-embedded low-voltage current transformer

Abstract

The utility model relates to a low-voltage electric energy metering and current measuring device of an electric power system, in particular to a label embedded type low-voltage current transformer. Comprising a coil device body, a pouring body, a label and a base, the middle of the pouring body is a circular ring body which wraps the coil device body and is provided with a primary bus hole, the upper portion and the lower portion of the pouring body are an upper square body and a lower square body which are communicated with the circular ring body respectively, and the label is embedded in the top plane of the upper square body. The bottom plane of the lower square body is connected with the base, and a secondary wiring terminal of the coil device body is arranged on the lower square body. The distribution box has the characteristics of small volume, compact structure, fast installation, convenient disassembly, electricity larceny prevention, intensification and the like, and is suitable for transformer area metering transformation and new construction.

Description

Technical Field

[0001] The utility model relates to a low-voltage electric energy metering and current measuring device for an electric power system, in particular to a sign-plate embedded type low-voltage current transformer. Background Art

[0002] Cable-through current transformers are commonly used for indoor metering in power systems. They are used for energy metering and current measurement. That is, the primary incoming and outgoing lines use insulated cables, and the matching current transformers are in the form of busbars and are installed outside the primary insulated cables to achieve current measurement. Current current transformers are large in size, cumbersome to install and disassemble, and have problems such as stolen or replaced signs to steal electricity. In order to prevent this phenomenon from happening, the product structure needs to be further improved. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide a low-voltage current transformer with a nameplate embedded therein, so as to solve the problems of the existing current transformers being large in size, complicated to install and disassemble, and the possibility of the nameplate being stolen or replaced to steal electricity.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a nameplate embedded type low-voltage current transformer, comprising a coil body, a cast body, a nameplate and a base, wherein the middle part of the cast body is a circular ring body which encapsulates the coil body and has a primary busbar hole, the upper part and the lower part of the cast body are respectively an upper square body and a lower square body which intersect the circular ring body, the nameplate is embedded in the top plane of the upper square body, the bottom plane of the lower square body is connected to the base, and the secondary wiring terminal of the coil body is arranged on the lower square body.

[0006] The casting body is an integrated structure formed by casting epoxy resin with the coil body and the nameplate.

[0007] The top plane of the upper square body and the bottom plane of the lower square body are both parallel to the axis of the primary busbar hole.

[0008] The widths of the upper square body and the lower square body are equal and smaller than the width of the annular body, the lengths of the upper square body and the lower square body are smaller than the outer diameter of the annular body, and the length of the upper square body is greater than the length of the lower square body.

[0009] The outer cover of the secondary wiring terminal is provided with a secondary wiring cover, and the secondary wiring cover is threadedly connected with the insert in the lower square body through a secondary wiring cover lead sealing nail.

[0010] The base is a flat plate structure, and waist-shaped mounting holes are provided at both ends.

[0011] The coil body comprises an iron core and a secondary winding, wherein the iron core is a ring structure, the secondary winding is evenly wound on the iron core, and then buffered and wrapped with insulating material, and two leads of the secondary winding are respectively connected to the two secondary terminals.

[0012] The advantages and beneficial effects of the utility model are:

[0013] 1. Small size and compact structure: The utility model adopts potting epoxy resin to cast and solidify the coil body and the nameplate into one, and the secondary wiring seat with secondary wiring cover is adopted. The product has a small size and a more compact structure, and the secondary wiring and outlet are very convenient.

[0014] 2. Quick installation and easy disassembly: The bottom plate fixing method designed in the utility model is very convenient and quick during installation, disassembly and maintenance, thus improving work efficiency.

[0015] 3. Anti-electricity theft and intensification: The secondary wiring of the utility model is fixed with lead-sealed screws and can be sealed, which fundamentally solves the possibility of complex wiring and easy electricity theft of the original transformer, significantly improves the degree of intensification, and improves the reliability of power supply metering; the nameplate is inlaid to achieve the purpose of not being able to replace the nameplate without damage, which plays a role in preventing electricity theft; the product is widely used in metering transformation and new construction projects in substations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of the utility model of a sign-plate embedded low-voltage current transformer;

[0017] Figure 2 for Figure 1 Left view of;

[0018] Figure 3 for Figure 1 Top view of the .

[0019] In the figure: 1- iron core, 2- secondary winding, 3- casting body, 4- nameplate, 5- base, 6- secondary wiring cover, 7- secondary wiring cover lead sealing nail, 8- primary busbar hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1 to 3As shown, the utility model provides a nameplate embedded low-voltage current transformer, including a coil body, a cast body 3, a nameplate 4 and a base 5, wherein the middle part of the cast body 3 is a circular body encapsulating the coil body and having a primary busbar hole 8, the upper and lower parts of the cast body 3 are respectively an upper square body and a lower square body intersecting the circular body, the nameplate 4 is embedded in the top plane of the upper square body, the bottom plane of the lower square body is connected to the base 5, and the secondary terminal of the coil body is arranged on the lower square body.

[0022] In the embodiment of the utility model, the casting body 3 is cast with epoxy resin and the coil body and the sign 4 as an integrated structure. The coil body includes an iron core 1 and a secondary winding 2, wherein the iron core 1 is a ring structure, the secondary winding 2 is evenly wound on the iron core 1, and then the insulating material is used for buffering and wrapping, and the two leads of the secondary winding 2 are respectively connected to the two secondary terminals. The sign 4 adopts an inlaid structure design. After casting, the sign 4 is fixed together with the casting body 3, and the sign 4 cannot be replaced, so as to achieve the purpose of preventing the sign from being replaced and the leakage of electricity.

[0023] In the embodiment of the utility model, the top plane of the upper square body and the bottom plane of the lower square body are both parallel to the axis of the primary busbar hole 8 .

[0024] like Figures 1 to 3 As shown, in the embodiment of the utility model, the width of the upper square body and the lower square body of the casting body 3 is equal and smaller than the width of the ring body, the length of the upper square body and the lower square body is smaller than the outer diameter of the ring body, and the length of the upper square body is greater than the length of the lower square body. The structure is small in size and more compact, while reducing the space occupied by the installation, achieving the purpose of intensiveness.

[0025] Furthermore, a secondary wiring cover 6 is provided on the outer cover of the secondary wiring terminal, and the secondary wiring cover 6 is threadedly connected with the insert in the lower square body through a secondary wiring cover lead sealing nail 7 to prevent secondary electricity theft.

[0026] Furthermore, the base 5 is a flat plate structure, and waist-shaped mounting holes are provided at both ends to facilitate the overall installation and position adjustment of the product, and the through-type structure achieves a pillar-type installation method.

[0027] The utility model provides a sign-plate embedded low-voltage current transformer, the preparation process of which is:

[0028] The secondary winding 2 is wound evenly on the annular iron core 1, and the insulating material is used for buffering and wrapping to form the coil body. The corresponding mold is used for molding, the label 4 is embedded in the mold, the coil body is placed in the mold, the distance between the coil body is adjusted, and then the epoxy resin is poured. When assembling the product, the secondary wiring screws are installed, and after the experiment is completed, the secondary wiring cover 6 and the secondary wiring cover lead seal nail 7 are installed on the product.

[0029] During installation and use, according to the structural characteristics of the project and supporting equipment, use the base 5 to fix the product, pass the primary cable through the primary busbar hole 8 of the product, remove the secondary wiring cover 6 and the secondary wiring cover lead sealing nails 7, connect the secondary lead wires, cover the secondary wiring cover 6, pass the lead wires through the secondary holes on both sides, install the secondary wiring cover lead sealing nails 7 on the product to achieve secondary sealing, and the installation is complete.

[0030] The utility model provides a sign-plate embedded low-voltage current transformer, which is a new product designed in full accordance with national standards. It is formed by pouring and curing epoxy resin, adopts a rolled iron core, and utilizes the electromagnetic conversion principle to enable the secondary current to accurately reflect the change of the measured primary current and transmit it to the secondary metering and control device for use as current and electric energy measurement. It solves the problems of inconvenient installation and disassembly, easy electricity theft, etc. of the existing power system cable through-type current transformer. The product has the characteristics of small size, compact structure, quick installation, convenient disassembly, anti-electricity theft, intensiveness, etc., and is suitable for metering transformation and new construction projects in substations.

[0031] The above description is only an implementation method of the utility model and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. A sign-embedded low-voltage current transformer, characterized in that: The invention comprises a coil body, a casting body (3), a sign (4) and a base (5), wherein the middle part of the casting body (3) is a circular ring body encapsulating the coil body and having a primary busbar hole (8), the upper part and the lower part of the casting body (3) are respectively an upper square body and a lower square body intersecting the circular ring body, the sign (4) is embedded in the top plane of the upper square body, the bottom plane of the lower square body is connected to the base (5), and the secondary connection terminal of the coil body is arranged on the lower square body.

2. The sign-plate embedded low-voltage current transformer according to claim 1, characterized in that: The casting body (3) is cast with the coil body and the nameplate (4) using epoxy resin to form an integrated structure.

3. The sign-plate embedded low-voltage current transformer according to claim 2, characterized in that: The top plane of the upper square body and the bottom plane of the lower square body are both parallel to the axis of the primary busbar hole (8).

4. The sign-plate embedded low-voltage current transformer according to claim 3, characterized in that: The widths of the upper square body and the lower square body are equal and smaller than the width of the annular body, the lengths of the upper square body and the lower square body are smaller than the outer diameter of the annular body, and the length of the upper square body is greater than the length of the lower square body.

5. The nameplate embedded low-voltage current transformer according to claim 1, characterized in that: The outer cover of the secondary wiring terminal is provided with a secondary wiring cover (6), and the secondary wiring cover (6) is threadedly connected to the insert in the lower square body through a secondary wiring cover lead sealing nail (7).

6. The nameplate embedded low-voltage current transformer according to claim 1, characterized in that: The base (5) is a flat plate structure, and waist-shaped mounting holes are provided at both ends.

7. The sign-plate embedded low-voltage current transformer according to claim 1, characterized in that: The coil body comprises an iron core (1) and a secondary winding (2), wherein the iron core (1) is a ring structure, the secondary winding (2) is evenly wound on the iron core (1), and then buffered and wrapped with insulating material, and two leads of the secondary winding (2) are respectively connected to the two secondary wiring terminals.

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