CN216487553U - Outdoor single-phase low-voltage current transformer - Google Patents
Outdoor single-phase low-voltage current transformer Download PDFInfo
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- CN216487553U CN216487553U CN202122913428.3U CN202122913428U CN216487553U CN 216487553 U CN216487553 U CN 216487553U CN 202122913428 U CN202122913428 U CN 202122913428U CN 216487553 U CN216487553 U CN 216487553U
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Abstract
The utility model relates to an electric energy metering and current measuring device for a low-voltage transformer area of an electric power system, in particular to an outdoor single-phase low-voltage current transformer. The device comprises an insulator and a coil body sealed in the insulator, wherein the upper part of the insulator is provided with a bus hole, the bottom of the insulator is provided with a secondary terminal cavity, and the side part of the secondary terminal cavity is provided with a secondary wire outlet waterproof rubber plug for leading out a secondary terminal; the front end of the secondary terminal cavity is sealed by a secondary cover plate. The insulator comprises a supporting part and a body part arranged at the upper end of the supporting part, wherein the body part is of a cylindrical structure, the center of the body part is provided with a bus hole, and the bus hole is of a circular structure; the coil body is accommodated in the body part; the secondary terminal cavity is arranged on the supporting part. The utility model has the advantages of small volume, compact structure, quick installation, convenient disassembly, electricity larceny prevention and intensification, and is widely applied to various low-voltage transformer area metering projects of an electric power system.
Description
Technical Field
The utility model relates to an electric energy metering and current measuring device for a low-voltage transformer area of an electric power system, in particular to an outdoor single-phase low-voltage current transformer.
Background
The low-voltage transformer area of the power system is generally measured by adopting a cable through type current transformer and used for electric energy measurement and current measurement, namely, an insulated cable is adopted for a primary incoming and outgoing line, and the matched current transformer is sleeved outside the primary insulated cable in a bus form, so that the current measurement is realized. Because the product is used outdoors, waterproof and antirust are the control points, the traditional method adopts secondary wax sealing and other modes, the operation is very troublesome, the maintenance operation is also very inconvenient, and the product structural form needs to be further improved according to the requirements of product intensification, electricity larceny prevention and the like.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model aims to provide an outdoor single-phase low-voltage current transformer to solve the problems of difficult waterproof and antirust control and the like of the current transformer in the low-voltage transformer area of the existing power system.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an outdoor single-phase low-voltage current transformer comprises an insulator and a coil body sealed in the insulator, wherein the upper part of the insulator is provided with a bus hole, the bottom of the insulator is provided with a secondary terminal cavity, and the side part of the secondary terminal cavity is provided with a secondary outlet waterproof rubber plug for leading out a secondary terminal; the front end of the secondary terminal cavity is sealed by a secondary cover plate.
The insulator comprises a supporting part and a body part arranged at the upper end of the supporting part, wherein the body part is of a cylindrical structure, the center of the body part is provided with the bus hole, and the bus hole is of a circular structure; the coil body is accommodated in the body part; the secondary terminal cavity is arranged on the supporting part.
The supporting part is of a square structure, and a bottom plate is arranged at the bottom of the supporting part.
Through holes are formed in two side walls of the secondary terminal cavity along the axis direction of the bus hole, and the secondary wire outlet waterproof rubber plug is inserted into the through holes.
The secondary apron with be equipped with the secondary seal cushion between the secondary terminal chamber, the secondary apron through secondary lead sealing screw with the secondary terminal chamber is connected.
The coil body comprises an iron core and a secondary winding wound on the iron core, and the outer side of the secondary winding is wrapped with an insulating material.
The insulator is in an integrated structure formed by vacuum casting of epoxy resin and the coil body.
The utility model has the following advantages and beneficial effects:
1. small, compact structure: the utility model is formed by vacuum pouring and curing of epoxy resin, and adopts a cover plate and rubber pad type for the second time, so that the product has small volume and more compact structure, and the secondary wiring and outgoing lines are very convenient;
2. the installation is swift, the dismantlement is convenient: the bottom plate fixing mode designed by the utility model is very convenient and quick to install, disassemble and maintain, and improves the working efficiency;
3. electricity larceny prevention and intensification: the secondary wiring part is fixed by adopting a lead sealing screw, so that lead sealing can be performed, the possibility that the original mutual inductor is complex in wiring and easy to steal electricity is fundamentally solved, the intensification degree is obviously improved, and the reliability of power supply metering is improved; the product is widely applied to the measurement transformation of the transformer area and the new construction;
drawings
FIG. 1 is a schematic structural diagram of an outdoor single-phase low-voltage current transformer according to the present invention;
FIG. 2 is a partial cross-sectional left view of FIG. 1;
in the figure: 1 is the iron core, 2 is secondary winding, 3 is the secondary apron, 4 is secondary seal cushion, 5 is secondary lead sealing screw, 6 is the waterproof plug of secondary being qualified for the next round of competitions, 7 is the bottom plate, 8 is the bus bar hole, 9 is the insulator, 91 is the supporting part, 92 is the body portion, 10 is the secondary terminal chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the utility model provides an outdoor single-phase low-voltage current transformer, which comprises an insulator 9 and a coil body sealed in the insulator 9, wherein the upper part of the insulator 9 is provided with a bus hole 8, the bottom of the insulator is provided with a secondary terminal cavity 10, and the side part of the secondary terminal cavity 10 is provided with a secondary outlet waterproof rubber plug 6 for leading out a secondary terminal; the front end of the secondary terminal chamber 10 is sealed by a secondary cover plate 3.
In the embodiment of the present invention, the insulator 9 includes a supporting portion 91 and a body portion 92 disposed at the upper end of the supporting portion 91, wherein the body portion 92 has a cylindrical structure, and a bus bar hole 8 is disposed at the center, and the bus bar hole 8 has a circular structure; the coil body is accommodated in the body portion 92; the secondary terminal cavities 10 are provided on the support portion 91.
Specifically, supporting part 91 is square structure, and the bottom is equipped with bottom plate 7, and bottom plate 7 adopts hot galvanizing to handle, and the bottom plate corrosion can effectively be prevented to the cladding material, satisfies outdoor rust-resistant service condition. Through holes are arranged on two side walls of the secondary terminal cavity 10 along the axis direction of the bus bar hole 8, and a secondary wire outlet waterproof rubber plug 6 is inserted into the through holes. The secondary outlet waterproof rubber plug 6 is used for the secondary lead to penetrate out, so that the wiring is convenient, and the sealing and waterproof purposes of secondary outlet are guaranteed.
Further, be equipped with secondary seal cushion 4 between secondary apron 3 and the secondary terminal chamber 10, secondary apron 3 is connected with secondary terminal chamber 10 through secondary lead sealing screw 5. The secondary cover plate 3 and the secondary sealing rubber gasket 4 effectively prevent external rainwater from permeating into a secondary wiring part when the product is normally used, and ensure that a secondary short circuit cannot occur; the secondary lead sealing screw 5 can lead seal the secondary wiring position, and the purpose of preventing electricity stealing of the secondary wiring is achieved.
In the embodiment of the utility model, the coil body comprises an iron core 1 and a secondary winding 2 wound on the iron core 1, and the outer side of the secondary winding 2 is wrapped with an insulating material. The insulator 9 is cast into an integral structure with the coil body by adopting epoxy resin.
The utility model provides an outdoor single-phase low-voltage current transformer, which comprises the following manufacturing processes:
the secondary winding 2 is uniformly wound on the annular iron core 1, the insulating material is utilized to buffer and wrap, the coil body is fixed on a special support, the coil distance is adjusted, a corresponding mould is used for mould filling, the form of the fixed support is adopted during mould filling, and then epoxy resin vacuum pouring is carried out. During product assembly, a bottom plate 7 of hot galvanizing is fixed by using a countersunk screw, a secondary wire outlet waterproof rubber plug 6 is inserted into a through hole on the side wall of the secondary terminal cavity 10, a secondary cover plate 3 and a secondary sealing rubber pad 4 are matched, and the secondary sealing rubber pad 4 and the secondary cover plate 3 are installed on the product according to an assembly drawing by using a secondary lead sealing screw 5 after the experiment is finished.
When the installation is used, according to the structural characteristics of engineering and corollary equipment, utilize bottom plate 7 to fix the product, the generating line hole 8 of product is vacated to the primary cable, with secondary apron 3 and secondary seal cushion 4 pull down, the secondary lead wire passes the waterproof plug 6 of being qualified for the next round of competitions of both sides, carries out the wiring according to the secondary sign, then on installing the product with secondary apron 3 and secondary seal cushion 4, realizes the secondary seal, the installation is accomplished.
The utility model provides an outdoor single-phase low-voltage current transformer, which is a new product designed completely according to national standards, is formed by vacuum casting and curing epoxy resin, adopts a coiled iron core, utilizes an electromagnetic conversion principle to ensure that secondary current can accurately reflect the change condition of primary current to be measured and is transmitted to a secondary metering and controlling device to be used as current and electric energy measurement; the cable through type current transformer solves the problems that the cable through type current transformer of the existing power system is inconvenient to mount and dismount, is easy to steal electricity and the like, has the characteristics of small volume, compact structure, rapidness in mounting, convenience in dismounting, electricity larceny prevention, intensification and the like, and is widely applied to transformer district metering transformation and new construction.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (7)
1. An outdoor single-phase low-voltage current transformer is characterized by comprising an insulator (9) and a coil body sealed in the insulator (9), wherein a bus hole (8) is formed in the upper part of the insulator (9), a secondary terminal cavity (10) is formed in the bottom of the insulator, and a secondary outlet waterproof rubber plug (6) for leading out a secondary terminal is arranged on the side part of the secondary terminal cavity (10); the front end of the secondary terminal cavity (10) is sealed by a secondary cover plate (3).
2. An outdoor single-phase low-voltage current transformer according to claim 1, characterized in that the insulator (9) comprises a supporting portion (91) and a body portion (92) arranged at the upper end of the supporting portion (91), wherein the body portion (92) is of a cylindrical structure, the bus hole (8) is arranged at the center, and the bus hole (8) is of a circular structure; the coil body is accommodated in the body part (92); the secondary terminal cavity (10) is arranged on the supporting part (91).
3. An outdoor single-phase low-voltage current transformer according to claim 2, characterized in that the supporting part (91) is of a square structure and is provided with a bottom plate (7) at the bottom.
4. An outdoor single-phase low-voltage current transformer according to claim 2, wherein through holes are arranged on two side walls of the secondary terminal cavity (10) along the axial direction of the bus hole (8), and the secondary outlet waterproof rubber plug (6) is inserted into the through holes.
5. An outdoor single-phase low-voltage current transformer according to claim 2, characterized in that a secondary sealing rubber gasket (4) is arranged between the secondary cover plate (3) and the secondary terminal cavity (10), and the secondary cover plate (3) is connected with the secondary terminal cavity (10) through a secondary lead sealing screw (5).
6. An outdoor single-phase low-voltage current transformer according to claim 2, characterized in that the body of the coil comprises an iron core (1) and a secondary winding (2) wound on the iron core (1), and the outside of the secondary winding (2) is wrapped with an insulating material.
7. An outdoor single-phase low-voltage current transformer according to claim 2, characterized in that the insulator (9) is vacuum-cast with the coil body as a one-piece structure using epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122913428.3U CN216487553U (en) | 2021-11-25 | 2021-11-25 | Outdoor single-phase low-voltage current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122913428.3U CN216487553U (en) | 2021-11-25 | 2021-11-25 | Outdoor single-phase low-voltage current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216487553U true CN216487553U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122913428.3U Active CN216487553U (en) | 2021-11-25 | 2021-11-25 | Outdoor single-phase low-voltage current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216487553U (en) |
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2021
- 2021-11-25 CN CN202122913428.3U patent/CN216487553U/en active Active
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