CN221352530U - Current transformer structure and circuit breaker - Google Patents
Current transformer structure and circuit breaker Download PDFInfo
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- CN221352530U CN221352530U CN202322623934.8U CN202322623934U CN221352530U CN 221352530 U CN221352530 U CN 221352530U CN 202322623934 U CN202322623934 U CN 202322623934U CN 221352530 U CN221352530 U CN 221352530U
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- 239000004020 conductor Substances 0.000 claims description 31
- 238000005452 bending Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 14
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 4
- 241000719178 Carangoides ruber Species 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 210000001061 forehead Anatomy 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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Abstract
The utility model relates to a current transformer structure and a circuit breaker, and relates to the field of circuit breakers. According to the utility model, through improving the connecting sheet structure of the L pole of the enameled wire, the L pole connecting sheet structure is changed into an upper and lower staggered structure, the height of the L pole connecting sheet and the electric gap between the L pole connecting sheet and the N pole enameled wire are increased, and the L pole connecting sheet structure and the N pole enameled wire pass the rated withstand voltage 6.2kV test.
Description
Technical Field
The utility model relates to the field of L-pole and N-pole wiring devices, in particular to a current transformer structure and a circuit breaker.
Background
With the development of electronic miniature circuit breakers, more and more transformers are applied inside the miniature circuit breakers. Current transformers for miniature circuit breakers typically employ flexible wires as primary wires to facilitate efficient use of the small space inside the miniature circuit breaker, which creates two disadvantages:
1. The inability to form a modular transformer assembly presents significant inconvenience to the assembly automation.
2. When the transformer is wound with a plurality of turns on the primary side, the transformer is very inconvenient, the welding position of the primary wire is not easy to control, and the insulating partition plate is easy to damage.
Therefore, the technical field needs to overcome the defects of the prior art, solve the problems of modular design and production of the transformer component, enlarge the electric gap between L, N, improve the insulating property and the voltage-resistant grade of the product, and realize the assembly automation of the miniature circuit breaker. The problem of when satisfying small-size circuit breaker function requirement, avoid because the easy damaged phenomenon of lacquer skin of enameled wire after bending leads to withstand voltage breakdown's phenomenon is solved.
The disadvantages of the existing scheme 1-motor scheme are as follows:
1. the rated withstand voltage 6.2KV test cannot be met;
2. The welding of the L-pole wiring lug and the primary side enamelled wire of the energy-taking transformer has the influence, and the insulating partition plate is easy to damage;
3. the electric gap and the creepage distance are small, and L, N pole breakdown easily occurs.
For example, CN211125339U, a transformer structure patent, has the following drawbacks:
1) In the figures 1 and 2, the L-pole enameled wire 6 and the N-pole enameled wire 7 have an electric gap of less than 4mm after the L-pole enameled wire and the N-pole enameled wire are assembled due to the limitation of a shell space, and a breakdown phenomenon occurs in a rated withstand voltage test;
2) After the conducting bar 1 and the L-pole enameled wire are assembled, the conducting bar 1 needs to be clamped by a nipper pliers to fix the position of the L-pole enameled wire, the semicircular end part shape of the conducting bar 1 brings inconvenience to the nipper pliers, and the conducting bar cannot be fixed reliably, so that the L-pole enameled wire is easy to loose and cannot be fixed in a groove at the semicircular end part, and when the conducting bar 1 and the L-pole enameled wire are soldered, the cold joint or the unstable contact performance is easy to cause, and the product performance is influenced;
3) The conducting bar 1 is required to be bent at 3 positions on the die, and difficulty is brought to processing of parts.
Disclosure of utility model
The utility model aims to solve the technical problems that: the problem of mutual-inductor subassembly modularized design and production is solved to realize small-size circuit breaker assembly automation. The problem that the primary side multi-turn winding and various winding modes of the transformer are facilitated while the functional requirements of the miniature circuit breaker are met is solved, meanwhile, the electric gap between the L pole and the N pole is enlarged, and the insulating performance of the product is improved.
In view of the above problems, 1) the conductor bar 1 is modified, as shown in fig. 3 and 4, to form a modified conductor bar 8. Because the product is limited by the modular size, the volume and the internal space are small, the electric gap between the L-pole enameled wire 9 and the N-pole enameled wire 10 is enlarged by enlarging the longitudinal height of the conducting bar 8, the breakdown phenomenon is avoided in the rated withstand voltage test, and the insulating property of the product is improved; 2) After the conducting bar 8 and the L-pole enameled wire 9 are assembled, the long semicircular end part of the conducting bar is convenient to clamp by using a nipper pliers, the position of the L-pole enameled wire 9 can be reliably fixed, the L-pole enameled wire 9 is not easy to loose, and is fixed in a groove at the semicircular end part, so that the conducting bar 8 and the L-pole enameled wire 9 are convenient to solder, and the reliability of welding is ensured; 3) The conducting bar 8 is arranged on the die, only 1 part is required to be bent, the processing of parts is convenient, and the product size is easy to control.
In order to achieve the above purpose, the technical scheme of the utility model provides a current transformer structure, which comprises a current transformer shell, a first conductive bar partially penetrating through the top of the current transformer shell, and a second conductive bar partially penetrating through the bottom of the current transformer shell.
Preferably, the current transformer shell is provided with a first conducting bar jack and a second conducting bar jack which are respectively used for the first conducting bar and the second conducting bar to pass through.
Preferably, the current transformer shell is provided with a shell through hole and a connecting conductor jack between the first conductive row and the second conductive row.
Preferably, the first conductive bar comprises a first connecting part, a first straight section part, a second connecting part and a first bending part which are sequentially connected, and a first buckling part and a first groove part are sequentially arranged at the connecting part of the first straight section part and the second connecting part.
Preferably, the second conductive bar comprises a third connecting part, a third straight section, a connecting section, a second straight section and a second bending part which are sequentially connected, and a second clamping buckle part is arranged at the joint of the third straight section and the connecting section.
Preferably, the second straight section, the connecting section and the third straight section form a U-shaped structure, and the connecting section is arranged at the bottom of the U-shaped structure.
Preferably, the first bending part and the second straight part are provided with notches.
Preferably, the two sides of the current transformer shell are respectively provided with a support leg and a wire holder, and one side where the wire holder is located is additionally provided with a wire slot buckle.
Preferably, the first conductive strip may be connected with an equipotential sheet.
And (3) increasing: fig. 7 shows that two bosses are added 205 on the connecting plate 2, and fig. 8 shows that a fixing plate 206 is installed on the two bosses 205, and the fixing plate 206 is a cuboid, so that a limiting effect is achieved when a wiring screw is screwed into a wiring frame, damage of an external connection wire caused by excessive torque is avoided, connection reliability of a flexible wire or a hard wire can be ensured, and the external wire is prevented from loosening from the wiring frame, especially a small-current wire is connected.
The technical scheme of the utility model also provides a circuit breaker, which is provided with the current transformer.
In summary, the utility model has the following beneficial technical effects:
In order to meet the automatic assembly requirement of products, the magnetic flux transformer is horizontally placed, the assembly problem of the transformer is solved by bending enameled wires, and threading of the transformer is designed, but the rated withstand voltage is unstable in a 6.2kV test due to damage of the enameled skin caused by overlarge bending angle. Through improving the connection piece structure of enameled wire L utmost point, change into upper and lower staggered structure, increase L utmost point connection piece height and with N utmost point enameled wire between electric gap, pass rated withstand voltage 6.2kV test.
Drawings
FIG. 1 is a schematic diagram I mentioned in the background art;
FIG. 2 is a schematic diagram II mentioned in the background art;
FIG. 3 is a schematic diagram I mentioned in the summary of the utility model;
FIG. 4 is a schematic diagram II mentioned in the summary of the utility model;
FIG. 5 is a schematic diagram of a current transformer according to the present utility model;
FIG. 6 is a schematic diagram of a current transformer according to the second embodiment of the present utility model;
FIG. 7 is a schematic diagram of a current transformer according to the present utility model;
FIG. 8 is a schematic diagram of a current transformer housing in a current transformer structure according to the present utility model;
FIG. 9 is a schematic diagram of a conductive strip in a current transformer structure according to the present utility model;
FIG. 10 is a schematic diagram of a second conductive strip in a current transformer structure according to the present utility model;
FIG. 11 is an assembly view of a connecting plate in a current transformer structure according to the present utility model;
FIG. 12 is a schematic diagram of a current transformer structure of the present utility model before bending a conductive strip;
FIG. 13 is a schematic diagram of a bent conductive strip of the current transformer according to the present utility model;
Fig. 14 is a schematic diagram of the internal structure of a circuit breaker (the conductive bar is not bent);
fig. 15 is a schematic diagram of the internal structure of a circuit breaker according to the present utility model.
Reference numerals:
1. Conducting bar I; 101. a groove portion; 102. one part of the buckle is buckled; 103. a first connecting part; 104. a second connecting part; 105. a straight section one part; 106. a semicircular notch; 2. conducting bars II; 201. bending the second part; 202. a connection section; 203. a second buckle part; 204. a third joint; 205. a terminal; 210. a straight section II; 211. three straight sections; 3. a forehead conductor; 301. a first connecting conductor; 302. a second connecting conductor; 303. a third connecting conductor; 4. a current transformer housing; 401. wire slot buckle; 402. a support leg; 403. a wire holder; 404. a second jack of the conductive bar; 405. a housing through hole; 406. a jack of the conducting bar; 407. a connection conductor jack; 5. equipotential sheets;
1', conducting bars I; 2', a second conductive bar; 3', secondary turns; 4', a current transformer shell; 41' and an upper end face; 5', equipotential sheet; 6', L-pole enameled wire; 7', N pole enamelled wire.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment of the utility model discloses a circuit breaker which is provided with a current transformer structure, wherein the current transformer structure comprises a first conductive bar 1, a second conductive bar 2, a current transformer shell 4, an equipotential sheet 5 and a connecting conductor; the first conductive row 1 is provided with a groove part 101, a first buckle part 102, a first connecting part 103, a second connecting part 104, a first straight section part 105 and a semicircular notch 106; bending a semicircular notch 106 at the first position of the conductive bar and welding an L-pole enameled wire of the current transformer; the first conductive bar 1 comprises a semicircular notch 106 with one end, the semicircular notch 106 is connected with one end of the groove part 101 through the second connecting part 104, the other end of the groove part 101 is connected with one end of the first clamping part 102, and the other end of the first clamping part 102 is connected with the first connecting part 103 through the first straight section 105.
In order to guide and extinguish the electric arc, an equipotential sheet 5 is usually connected to the main conductive loop, and the conductive strip 1 is connected with the equipotential sheet 5 in a welding mode or a riveting mode. The equipotential sheet 5 is welded or riveted with the second joint 104 of the first conductive bar 1 to realize electric connection, the whole assembly is formed into a whole, and the relative positions of all parts are fixed, so that the automatic assembly and the welding are convenient to implement. The first coupling part 103 may be soldered or riveted to the first connection conductor 301, the second connection conductor 302 or the third connection conductor 303 to achieve an electrical connection.
The current transformer shell 4 is a flat cylinder, a supporting leg 402 is arranged on the circumferential cambered surface on one side of the cylinder, and a wire holder 403 is arranged on the other side of the current transformer shell 4 corresponding to the supporting leg 402; the circle center of the cylinder of the current transformer shell 4 is provided with a plurality of through holes, and one ends of the first conductive row 1 and the second conductive row 2 penetrate through different through holes; two ends of the first conductive row 1 and the second conductive row 2 are positioned outside the cylinder of the current transformer shell 4; one end of the first conductive bar 1, which is arranged on the outer side of the cylinder of the current transformer shell 4, is connected with the equipotential sheet 5, and the other end of the first conductive bar is connected with the second conductive bar 2 through a connecting conductor.
The other end of the first conductive row 1, which is arranged outside the cylinder of the current transformer shell 4, is connected with the second conductive row 2 through a connecting conductor. The first conductive strip 1 comprises a semicircular notch 106 arranged at one end, the semicircular notch 106 is connected with one end of the groove part 101 through the second connecting part 104, the other end of the groove part 101 is connected with one end of the first clamping part 102, and the other end of the first clamping part 102 is connected with the first connecting part 103 through the first straight section 105. The snap-fit portion 102 has a barb shape, and the barb surface of the snap-fit portion 102 faces one side of the groove portion 101.
The second conductive row 2 comprises a wiring terminal 205, one end of the wiring terminal 205 is connected with one end of a second straight section 210 through a right-angle bending part, the other end of the second straight section 210 is connected with one end of a third straight section 211 through a connecting section 202, and the other end of the third straight section 211 is connected with a third connecting part 204; the second straight section 210, the connecting section 202 and the third straight section 211 form a U-shape, and the connecting section 202 is arranged at the bottom of the U-shape; the terminal 205 and the third coupling portion 204 are located on both sides of the second straight portion 210. The straight section two part 210 is provided with a notch.
The current transformer housing 4 includes a wire slot buckle 401, a leg 402, a wire holder 403, a conductor bar two jack 404, a housing through hole 405, a conductor bar one jack 406, and a connection conductor jack 407. The secondary coil is mounted in the current transformer housing 4 for detecting a current signal, a voltage signal or for supplying energy to the control line. The outer surface is provided with a plurality of wire slot buckles 401 for fixing connecting conductors serving as primary sides, such as a second connecting conductor 302 and a third connecting conductor 303; legs 402 allow the current transformer housing 4 to be fixedly mounted within the circuit breaker; the wire holder 403 is the outgoing wire holder 403 of the secondary coil, and is connected out in a hard needle mode, so that the automatic assembly is convenient. The first conductor row insertion hole 406 serves as an insertion hole for the first conductor row 1, the second conductor row insertion hole 404 serves as an insertion hole for the second conductor row 2, and the connection conductor insertion hole 407 serves as an insertion hole for the second connection conductor 302 or the third connection conductor 303, for example.
In order to meet the automatic assembly requirement of products, the magnetic flux transformer is horizontally placed, the assembly problem of the transformer is solved by bending enameled wires, and threading of the transformer is designed, but the rated withstand voltage is unstable in a 6.2kV test due to damage of the enameled skin caused by overlarge bending angle. Through improving the connection piece structure of enameled wire L utmost point, change into upper and lower staggered structure, increase L utmost point connection piece height and with N utmost point enameled wire between electric gap, pass rated withstand voltage 6.2kV test.
Finally, it should be noted that: the foregoing description of the preferred embodiments of the present utility model is not intended to be limiting, but rather, although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (10)
1. The current transformer structure is characterized by comprising a current transformer shell (4), a first conductive row (1) which is partially penetrated through the top of the current transformer shell (4), and a second conductive row (2) which is partially penetrated through the bottom of the current transformer shell (4).
2. A current transformer structure according to claim 1, characterized in that the current transformer housing (4) is provided with a first busbar jack (406) and a second busbar jack (404) for the first and second busbars (1, 2) to pass through, respectively.
3. A current transformer structure according to claim 2, characterized in that the current transformer housing (4) is provided with a housing through hole (405) and a connection conductor socket (407) between the first conductor bar (1) and the second conductor bar (2).
4. A current transformer structure according to claim 3, wherein the first conductive strip (1) comprises a first connecting part (103), a first straight section part (105), a second connecting part (104) and a bent first connecting part which are sequentially connected, and a first buckling part (102) and a groove part (101) are sequentially arranged at the connecting part of the first straight section part (105) and the second connecting part (104).
5. The current transformer structure according to claim 4, wherein the second conductive row (2) comprises a third connecting portion (204), a third straight portion (211), a connecting portion (202), a second straight portion (210) and a second bending portion (201) which are sequentially connected, and a second clamping portion (203) is arranged at a connection position of the third straight portion (211) and the connecting portion (202).
6. The current transformer structure according to claim 5, wherein the straight section two part (210), the connecting section (202) and the straight section three part (211) form a U-shape, and the connecting section (202) is disposed at the bottom of the U-shape.
7. The current transformer structure of claim 6, wherein the bent first portion and the straight portion (210) are provided with notches.
8. The current transformer structure according to claim 1, wherein two sides of the current transformer housing (4) are respectively provided with a supporting leg (402) and a wire holder (403), and a wire slot buckle (401) is further arranged on one side where the wire holder (403) is located.
9. A current transformer structure according to claim 1, characterized in that the conductor bars (1) are connectable with equipotential sheets (5).
10. A circuit breaker, characterized in that a current transformer as claimed in any one of claims 1-9 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322623934.8U CN221352530U (en) | 2023-09-26 | 2023-09-26 | Current transformer structure and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322623934.8U CN221352530U (en) | 2023-09-26 | 2023-09-26 | Current transformer structure and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221352530U true CN221352530U (en) | 2024-07-16 |
Family
ID=91844282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322623934.8U Active CN221352530U (en) | 2023-09-26 | 2023-09-26 | Current transformer structure and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221352530U (en) |
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2023
- 2023-09-26 CN CN202322623934.8U patent/CN221352530U/en active Active
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