CN219202936U - Current transformer for high-voltage side of electric locomotive and electric vehicle set - Google Patents
Current transformer for high-voltage side of electric locomotive and electric vehicle set Download PDFInfo
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- CN219202936U CN219202936U CN202320032281.3U CN202320032281U CN219202936U CN 219202936 U CN219202936 U CN 219202936U CN 202320032281 U CN202320032281 U CN 202320032281U CN 219202936 U CN219202936 U CN 219202936U
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- insulator
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- iron core
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Abstract
The utility model relates to a high-voltage side measuring or relay protection device for an electric locomotive and an electric locomotive group, in particular to a current transformer for the high-voltage side of the electric locomotive and the electric locomotive group, which comprises a mounting plate, an insulator and a coil body, wherein the mounting plate is mounted on the P1 side of the insulator, the insulator is of a cylindrical structure with a primary bus hole in the center, and the coil body is packaged in the side wall of the insulator; the coil body comprises an iron core and a secondary winding, wherein the iron core is of a ring shape, an inner buffer insulating layer is wrapped on the outer surface of the iron core, the secondary winding is wound on the outer side of the iron core, an outer buffer insulating layer is wrapped on the outer side of the secondary winding, and a secondary wiring terminal of the secondary winding is arranged on the P1 side of the insulator. The utility model is formed by casting epoxy resin, and has the advantages of stable iron core performance, high measurement precision, small volume, flexible structure, convenient installation, high mechanical strength, stable insulation, reliable sealing and the like.
Description
Technical Field
The utility model relates to a high-voltage side measuring or relay protection device for an electric locomotive and an electric locomotive group, in particular to a current transformer for the high-voltage side of the electric locomotive and the electric locomotive group.
Background
The current transformers for the high-voltage sides of the electric locomotives and the electric vehicle groups are used as measuring or relay protection equipment in the vehicle-mounted control systems of the electric locomotives and the electric vehicles, the problem of low precision in the aspect of measurement exists, the current transformers matched with the electric locomotives and the electric vehicle groups in China mainly have two types, and one structure is a special outdoor bus structure for roof installation; the other is a bus structure mounted inside the vehicle body. Both structural products are foreign import products, and long-term practical application shows that the running safety is affected due to the fact that the accuracy of the secondary winding of the current transformer is too low. In addition, the outdoor bus type structural product installed on the roof mainly has the problems of low mechanical strength, loose sealing of a secondary junction box, large volume and the like; in view of maintenance and installation of locomotive electrical appliances, the bus structure product in the vehicle body mainly has the problem of inconvenience in installation, overhaul and maintenance and the like.
Disclosure of Invention
The utility model aims to provide a current transformer for the high-voltage side of an electric locomotive and an electric train set, which solves the problems of low precision, low strength, large volume, inconvenient maintenance and installation and the like of the current transformers for the high-voltage side of the existing electric locomotive and the electric train set.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a current transformer for a high-voltage side of an electric locomotive and an electric locomotive group, which comprises a mounting plate, an insulator and a coil body, wherein the mounting plate is arranged on the P1 side of the insulator, the insulator is of a cylindrical structure with a primary bus hole in the center, and the coil body is packaged in the side wall of the insulator;
the coil body comprises an iron core and secondary windings, wherein the iron core is of a ring-shaped structure, the outer circumference and the end faces of the two sides are wrapped with inner buffer insulating layers, the secondary windings are wound on the outer sides of the iron core, the outer buffer insulating layers are wrapped on the outer sides of the secondary windings, and secondary wiring terminals of the secondary windings are arranged on the P1 side of the insulator.
The inner buffer insulating layer comprises a layer of formed paperboard, a layer of polyester plate and a layer of polyester film and PVC self-adhesive tape which are sequentially arranged from inside to outside.
The outer buffer insulating layer comprises a polyester film, a twill cloth belt, yellow crepe paper and an insulating rubber belt which are sequentially wrapped on the outer surface of the secondary winding from inside to outside, and each layer is wrapped in a half-folding mode.
The secondary winding is uniformly wound on the iron core, and interlayer insulation is made of polyester films bound in a half-overlapping mode.
The outside of secondary binding post is equipped with secondary wiring cover, secondary wiring cover pass through white steel seal nail with mounting panel sealing connection.
The mounting plate is connected to the P1 side of the insulator through a white steel countersunk head screw; and a nameplate is embedded on the P2 side of the insulator.
The mounting plate is of a square structure, and a central hole for mounting the insulator is formed in the center of the mounting plate; mounting holes are formed in four corners of the mounting plate; the mounting plate is provided with square through holes at positions corresponding to the secondary wiring terminals, and the secondary wiring terminals extend out of the square through holes.
The insulator is of an integral structure formed by casting epoxy resin and the coil body.
The utility model has the advantages and beneficial effects that:
1. the iron core performance is stable, and measurement accuracy is high: the utility model adopts the iron core such as the formed paperboard, the polyester plate, the polyester film, the PVC self-adhesive tape, the twill cloth tape, the yellow crepe paper, the A-10 insulating rubber tape and the like to buffer, insulate and wrap, so as to reduce the influence of external force on the performance of the iron core, improve the measurement precision of the secondary winding and further improve the product performance of the current transformer.
2. Small volume, flexible structure and convenient installation: the insulator integrally cast by epoxy resin in vacuum is of a circular cylindrical structure, so that the volume of a product is effectively reduced; the secondary wire box and the insulator are designed to be of split type structures, and are fixed by using the white steel sealing nails, so that the product is convenient to install, detach and maintain in the high-voltage electrical apparatus box.
3. High mechanical strength, stable insulation and reliable sealing: the mounting plate is of a square plate-shaped structure, and the integral structure has enough mechanical strength and vibration and impact resistance in the application process; the insulating material is formed by vacuum casting high-quality epoxy resin and has excellent insulating performance.
Drawings
FIG. 1 is a schematic diagram of a current transformer for the high-voltage side of an electric locomotive and an electric locomotive set according to the present utility model;
FIG. 2 is a front view of a current transformer for the high side of an electric locomotive and an electric train in accordance with the present utility model;
FIG. 3 is a rear view of a current transformer for the high side of an electric locomotive and electric vehicle set in accordance with the present utility model;
in the figure: 1. the iron core, 2, secondary winding, 3, secondary binding post, 4, secondary wiring cover, 5, white steel seal nail, 6, mounting panel, 7, nameplate, 8, insulator, 9, primary bus hole, 10, white steel countersunk head screw, 11, mounting hole, 12, inner buffer insulating layer, 13, outer buffer insulating layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the utility model provides a current transformer for a high-voltage side of an electric locomotive and an electric locomotive set, which comprises a mounting plate 6, an insulator 8 and a coil body, wherein the mounting plate 6 is arranged on the P1 side of the insulator 8, the insulator 8 is of a cylindrical structure with a primary bus hole 9 in the center, and the coil body is packaged in the side wall of the insulator 8; the coil body comprises an iron core 1 and a secondary winding 2, wherein the iron core 1 is of a circular ring structure, an inner buffer insulating layer 12 is wrapped on the outer circumference and the end faces of two sides, the secondary winding 2 is wound on the outer side of the iron core 1, an outer buffer insulating layer 13 is wrapped on the outer side of the secondary winding 2, and a secondary wiring terminal 3 of the secondary winding 2 is arranged on the P1 side of an insulator 8.
In the embodiment of the utility model, the inner buffer insulating layer 12 is wrapped on the outer circumference and two side end surfaces of the iron core 1, and the inner buffer insulating layer 12 is used for reducing the influence of external force on the performance of the iron core 1. Specifically, the inner buffer insulating layer 12 comprises a layer of formed paperboard, a layer of polyester plate, and a layer of polyester film and PVC self-adhesive tape which are sequentially arranged from inside to outside, wherein the polyester film and the PVC self-adhesive tape are wrapped in a half-folding mode, and each layer of the inner buffer insulating layer 12 is sequentially wrapped from inside to outside, so that the performance of the iron core 1 is fully ensured, and the iron core cannot be greatly changed due to the action of external force. Simultaneously, polyester film and PVC self-adhesion sticky tape adopt half mode of folding to wrap up, give full play to insulating material's flexible characteristics, the rational utilization insulation space, the insulation is reliable.
Specifically, the secondary winding 2 is uniformly wound on the iron core 1, and interlayer insulation adopts a layer of polyester film which is wrapped in a half-overlapping mode, so that the magnetic field of the secondary winding is uniformly distributed.
In the embodiment of the utility model, the outer buffer insulating layer 13 comprises a polyester film, a twill cloth belt, yellow crepe paper and an insulating rubber belt which are sequentially wrapped on the outer surface of the secondary winding 2 from inside to outside, each layer is wrapped in a half-folding mode, the flexible characteristic of the insulating material is fully exerted, the insulation space is reasonably utilized, the insulation is reliable, the performance of the iron core 1 is fully ensured, and the iron core cannot be greatly changed due to the action of external force. Therefore, the outer buffer insulating layer 13 can further reduce the influence of external force on the performance of the iron core 1, and improves the measurement accuracy of the secondary winding 2, thereby improving the product performance of the current transformer. Preferably, the insulating rubber tape is an A-10 insulating rubber tape.
As shown in fig. 1 and 3, in the embodiment of the present utility model, a secondary wiring cover 4 is provided on the outer side of the secondary wiring terminal 3, and the secondary wiring cover 4 is connected with a mounting plate 6 in a sealing manner through a white steel sealing nail 5. The secondary wiring terminal 3 is sealed inside the secondary wiring cover 4, so that the wiring of a user is facilitated. Preferably, the secondary wiring cover 4 is a square cover plate structure made of polycarbonate material.
Further, the mounting plate 6 is connected to the P1 side of the insulator 8 by a white steel countersunk head screw 10; the P2 side of the insulator 8 is embedded with a nameplate 7, the P1 side is the incoming line side, and the P2 side is the outgoing line side.
Specifically, the mounting plate 6 has a square structure, and a center hole for mounting the insulator 8 is provided in the center; four corners of the mounting plate 6 are provided with mounting holes 11; the mounting plate 6 is provided with square through holes at positions corresponding to the secondary wiring terminals 3, and the secondary wiring terminals 3 extend out of the square through holes.
In the embodiment of the utility model, the insulator 8 is of an integral structure formed by casting epoxy resin and a coil body, the primary bus hole 9 in the center of the insulator 8 is of a cylindrical structure and is used for the transition of a primary high-voltage insulating cable, and the secondary wiring terminal 3 of the secondary winding 2 is led out from the inlet wire side of the insulator 8. Specifically, the secondary winding 2 is put into a mould, the insulation is cured by epoxy resin vacuum casting after the distance is adjusted, the insulation distance is ensured to be uniform, and then the insulator 8 with the secondary wiring terminal 3 and the sealed secondary winding 2 is formed. The insulator 8 is fixed with the mounting plate 6 through a white steel countersunk head screw 10, is convenient for fixing and mounting in a high-voltage electrical appliance box, and has enough mechanical strength and vibration and impact resistance. The P2 side (outgoing line side) plane of the insulator 8 is provided with a nameplate 7, the nameplate 7 is made of an anti-corrosion and anti-aging metal material, and the nameplate can keep the writing clear and not fuzzy after long-term use.
The utility model provides a current transformer for a high-voltage side of an electric locomotive and an electric locomotive group, which is manufactured by the following steps:
manufacturing a coil body:
first, the inner buffer insulating layer 12 is wound around the outer side of the toroidal core 1. Specifically, all wrap up one deck shaping cardboard and one deck polyester sheet at the outer circumference and both sides terminal surface of magnetic core 1, adopt half mode of folding to wrap up polyester film and PVC self-adhesion sticky tape respectively one deck in proper order again, make the performance of iron core 1 obtain abundant assurance, can not take place great change because of receiving the effect of external force any more.
Then, the secondary winding 2 is uniformly wound on the annular iron core 1, and interlayer insulation is formed by half lamination of polyester films.
Then, the outer buffer insulating layer 13 is wound around the outer side of the secondary winding 2. Specifically, the outside of the secondary winding 2 is wrapped with a polyester film, a twill cloth belt, yellow crepe paper and an A-10 insulating rubber belt in a half-folding mode in sequence from inside to outside, the flexible characteristic of insulating materials is fully exerted, the insulating space is reasonably utilized, the insulation is reliable, and a coil body with the secondary wiring terminal 3 and the secondary winding 2 is formed after the outer wrapping.
And (3) die filling, pouring, assembling and installing:
the coil body with the secondary wiring terminal 3 and the secondary winding 2 is arranged in a mould, and after the distance is adjusted, epoxy resin is used for vacuum casting, curing and insulation, thus forming an insulator 8 with the secondary wiring terminal 2 and the sealed secondary winding 2; the center of the insulator 8 is provided with a round primary bus hole 9 for the transition of a primary high-voltage insulating cable; the secondary wiring cover 4 is of a polycarbonate square cover plate structure and is fixed with the mounting plate 6 by adopting a white steel sealing nail 5; the secondary wiring terminal 3 is enclosed inside the secondary wiring cover 4; the P2 side plane of the insulator 8 is provided with a metal product nameplate 7, the material is made of an anti-corrosion and anti-aging metal material, and the nameplate can keep the handwriting clear and not be blurred after long-term use; the mounting plate 6 is of a square plate-shaped structure, is fixed with the insulator 8 by adopting a white steel countersunk head screw 10, is convenient for fixing and mounting in a high-voltage electrical appliance box, and has enough mechanical strength and vibration and impact resistance. When the electric locomotive and the electric locomotive set are actually installed and used, the current transformer for the high-voltage side of the electric locomotive and the electric locomotive set is fixed in the high-voltage electrical appliance box through the mounting holes 11 on the mounting plate 6, the primary high-voltage bus cable passes through the primary bus hole 9 of the transformer, the primary high-voltage cable is adjusted to be fixed to the center position, then the secondary cable in the vehicle-mounted system is connected to the secondary wiring terminal 3, the electrical connection of secondary wiring is completed, the secondary wiring cover 4 is fixed on the mounting plate 6 through the white steel sealing nails 5, and the transformer is smoothly installed and completed.
The utility model adopts an integrated structure formed by casting epoxy resin, has stable iron core performance, high measurement precision, small volume, high mechanical strength, convenient installation, stable insulation, reliable sealing and no maintenance, and further improves the safety and reliability of electric locomotive and electric train control system equipment.
The foregoing is merely an embodiment of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims (8)
1. The current transformer for the high-voltage side of the electric locomotive and the electric locomotive set is characterized by comprising a mounting plate (6), an insulator (8) and a coil body, wherein the mounting plate (6) is arranged on the P1 side of the insulator (8), the insulator (8) is of a cylindrical structure with a primary bus hole (9) in the center, and the coil body is packaged in the side wall of the insulator (8);
the coil body comprises an iron core (1) and a secondary winding (2), wherein the iron core (1) is of a circular ring structure, an inner buffer insulating layer (12) is wrapped on the outer circumference and the end faces of the two sides, the secondary winding (2) is wound on the outer side of the iron core (1), an outer buffer insulating layer (13) is wrapped on the outer side of the secondary winding (2), and a secondary wiring terminal (3) of the secondary winding (2) is arranged on the P1 side of an insulator (8).
2. The current transformer for the high-voltage side of the electric locomotive and the electric locomotive set according to claim 1, wherein the inner buffer insulating layer (12) comprises one layer of formed paperboard, one layer of polyester plate and one layer of polyester film and PVC self-adhesive tape which are wrapped in a half-stacking mode from inside to outside.
3. The current transformer for the high-voltage side of the electric locomotive and the electric locomotive set according to claim 1, wherein the outer buffer insulating layer (13) comprises a polyester film, a twill cloth belt, yellow crepe paper and an insulating rubber belt which are sequentially wrapped on the outer surface of the secondary winding (2) from inside to outside, and each layer is wrapped in a half-folding mode.
4. The current transformer for the high-voltage side of the electric locomotive and the electric locomotive set according to claim 1, wherein the secondary winding (2) is uniformly wound on the iron core (1), and interlayer insulation is made of a polyester film wrapped in a half-stacked manner.
5. The current transformer for the high-voltage side of the electric locomotive and the electric locomotive set according to claim 1, wherein a secondary wiring cover (4) is arranged on the outer side of the secondary wiring terminal (3), and the secondary wiring cover (4) is in sealing connection with the mounting plate (6) through a white steel sealing nail (5).
6. The current transformer for the high-voltage side of the electric locomotive and the electric locomotive set according to claim 1, wherein the mounting plate (6) is connected to the P1 side of the insulator (8) through a white steel countersunk head screw (10); and a nameplate (7) is embedded on the P2 side of the insulator (8).
7. The current transformer for the high-voltage side of the electric locomotive and the electric locomotive set according to claim 6, wherein the mounting plate (6) has a square structure, and a center hole for mounting the insulator (8) is formed in the center; four corners of the mounting plate (6) are provided with mounting holes (11); the mounting plate (6) is provided with square through holes at positions corresponding to the secondary wiring terminals (3), and the secondary wiring terminals (3) extend out of the square through holes.
8. The current transformer for the high-voltage side of the electric locomotive and the electric locomotive set according to claim 1, wherein the insulator (8) is an integral structure cast with the coil body by epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320032281.3U CN219202936U (en) | 2023-01-06 | 2023-01-06 | Current transformer for high-voltage side of electric locomotive and electric vehicle set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320032281.3U CN219202936U (en) | 2023-01-06 | 2023-01-06 | Current transformer for high-voltage side of electric locomotive and electric vehicle set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219202936U true CN219202936U (en) | 2023-06-16 |
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ID=86710297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320032281.3U Active CN219202936U (en) | 2023-01-06 | 2023-01-06 | Current transformer for high-voltage side of electric locomotive and electric vehicle set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219202936U (en) |
-
2023
- 2023-01-06 CN CN202320032281.3U patent/CN219202936U/en active Active
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