CN118039290A - High protection ammeter current transformer - Google Patents
High protection ammeter current transformer Download PDFInfo
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- CN118039290A CN118039290A CN202410175332.7A CN202410175332A CN118039290A CN 118039290 A CN118039290 A CN 118039290A CN 202410175332 A CN202410175332 A CN 202410175332A CN 118039290 A CN118039290 A CN 118039290A
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- conductive block
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- current transformer
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- 238000005070 sampling Methods 0.000 claims abstract description 24
- 239000000523 sample Substances 0.000 claims abstract description 10
- 230000006698 induction Effects 0.000 claims description 8
- 238000005452 bending Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The invention relates to a high-protection ammeter current transformer which comprises a shell, a U-shaped mutual inductance frame and a voltage sampling needle, wherein the cross section of the shell is a closed body formed by two sections of U-shapes and two sections of circular arcs, one U-shape forms the bottom of the shell and is marked as a lower U-shape, two ends of the U-shape are respectively connected with one ends of the two circular arc-shaped bodies, a cylindrical convex column is arranged in the shell, the cylindrical convex column and the shell are integrated, and a rectangular hole is formed in the cylindrical convex column. The two probe holes of the voltage sampling needle are completely embedded with the bottom conductive block after being installed, and are tightly embedded with each other, so that the voltage is stable in value, and the problem of poor contact is effectively solved.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a high-protection ammeter current transformer.
Background
The mutual inductor is a main current signal acquisition component of the electric energy meter, and the performance of the mutual inductor directly influences the metering accuracy of the electric energy meter. Because in the alternating current line, the influence of direct current and even harmonic can produce great error to the current signal, especially under high-power load, traditional mutual-inductor is because the structure is unreasonable, and can filter its direct current harmonic, and then makes the mutual-inductor produce great measuring error, is difficult to keep the high accuracy measurement of electric current. From the structure, current output of current transformer adopts pencil lug to insert the circuit of being surveyed, leads to the project organization unreasonable, and production is inconvenient, simultaneously, the inconvenient wiring of pin and housing structure and assembly are difficult to judge the connection circuit accuracy.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a high-protection ammeter current transformer, wherein a current input terminal adopts a copper sheet, so that hard connection is realized, and spot welding is convenient; the probe, the pin and other parts are clamped by the clamping blocks, so that wiring and assembly are convenient; and the signal detection is arranged, so that whether the current loop is abnormal or not can be conveniently detected.
The technical scheme of the invention is that the high-protection ammeter current transformer comprises a shell, a U-shaped transformer frame and a voltage sampling needle, wherein the cross section of the shell is a closed body formed by two sections of U-shapes and two sections of circular arcs, one U-shape forms the bottom of the shell and is marked as a lower U-shape, two ends of the U-shape are respectively connected with one ends of the two circular arc-shaped bodies, the other U-shape is marked as an upper U-shape, two ends of the U-shape are respectively connected with the other ends of the two circular arc-shaped bodies, a cylindrical convex column is arranged in the shell, the cylindrical convex column and the shell are integrated, and a rectangular hole is formed in the cylindrical convex column;
The U-shaped mutual inductor comprises a bottom conductive block, a left side upright conductive block, a right side upright conductive block and a pin arrangement component which are horizontally placed, wherein the left side upright conductive block and the right side upright conductive block are vertically placed on one side of the bottom conductive block, the left side upright conductive block and the right side upright conductive block are of an integrally manufactured integral structure, a circular hole is formed in the upper portion of the right side upright conductive block, an opening circular hole is formed in the upper portion of the left side upright conductive block, a clamping protrusion is arranged below the opening circular hole, and the left side upright conductive block penetrates through the shell through the rectangular hole.
Preferably, the voltage sampling needle is in a strip shape, one end of the voltage sampling needle is provided with a needle-shaped sampling head, the other end of the voltage sampling needle is provided with two probe holes which are arranged side by side, the bottom of the bottom conductive block is provided with two circular protrusions which are arranged side by side, and the circular protrusions are embedded in the corresponding probe holes.
Preferably, two parallel pin-arranging grooves are arranged on one side surface of the upper U-shaped, a circular clamping ring is arranged at the bottom of each pin-arranging groove, two circuit interfaces are respectively arranged in each pin-arranging groove, two pin-arranging parts which are equidistant from the pin-arranging grooves are arranged on the pin-arranging parts, and the pin-arranging parts are inserted into the corresponding pin-arranging grooves and are connected with the corresponding circuit interfaces.
Preferably, the pin arranging part is L-shaped, and the head part is provided with a round chuck or a pointed chuck.
Preferably, a clamping groove is formed in the shell, and after the left vertical conductive block passes through the shell, the clamping protrusion is embedded with the clamping groove. Preferably, the shell is made of an insulating material.
Preferably, barbs which are reversed in one direction are arranged on the inner wall of the rectangular hole.
Preferably, the cylindrical convex column is provided with a circuit board and an induction coil, and the circuit board is used for protecting the transformer from the influence of internal and external electromagnetic interference.
The invention has the beneficial effects that:
1) The clamping protrusions enable the shell and the U-shaped mutual induction frame to be tightly embedded, so that the loosening phenomenon between the shell and the U-shaped mutual induction frame is effectively avoided, and further the safety accident that large current leaks to the shell is avoided;
2) The two probe holes of the voltage sampling needle are completely embedded with the bottom conductive block after being installed, and are mutually tightly embedded, so that the voltage is stable in value, and the problem of poor contact is effectively solved. Meanwhile, the voltage sampling needle and the shell form a compact structure;
3) The inner wall of the rectangular hole is provided with the barbs which are reversed in one direction, and when the U-shaped mutual inductance frame passes through the shell, the U-shaped mutual inductance frame can be stably fixed and cannot be withdrawn in a reversing way.
4) The pin arranging part head is provided with a circular clamping head which can be tightly combined with a circular clamping ring in the pin arranging groove, so that reliable and stable circuit contact is ensured;
5) The invention can maintain high-precision measurement of current under high power, and has small influence error on direct current and even harmonic in an alternating current line.
Description of the drawings:
FIG. 1 is a schematic diagram of a front view of the present invention;
FIG. 2 is a schematic perspective view of the housing structure and pin header assembly of the present invention;
FIG. 3 is a schematic perspective view of the U-shaped transformer and the voltage sampling needle;
FIG. 4 is a schematic rear view of the housing and pin header assembly configuration of the present invention;
Fig. 5 is a schematic perspective view of the present invention.
In the figure, 1, a shell; 2. a U-shaped mutual inductance frame; 3. a voltage sampling needle; 4. upper U-shaped; 5. a pin arranging member; 6. a lower U-shape; 7. a cylindrical post; 8. a rectangular hole; 9. a bottom conductive block; 10. the conductive block is erected on the left side; 11. the conductive block is erected on the right side; 12. a circular hole; 13. a clamping protrusion; 14. an opening round hole; 15. a probe hole; 16. a circular protrusion; 17. pin grooves.
Detailed Description
As shown in fig. 1 to 5, the invention comprises a shell 1, a U-shaped mutual induction frame 2 and a voltage sampling needle 3, wherein the cross section of the shell is a closed body formed by two sections of U-shapes and two sections of circular arcs, one of the U-shapes forms the bottom of the shell 1 and is marked as a lower U-shape 6, two ends of the lower U-shape are respectively connected with one ends of the two circular arc-shaped bodies, the other U-shape is marked as an upper U-shape 4, two ends of the lower U-shape are respectively connected with the other ends of the two circular arc-shaped bodies, a cylindrical convex column 7 is arranged in the shell 1, the cylindrical convex column 7 is integrated with the shell 1, a circuit board and an induction coil are arranged on the cylindrical convex column 7, and an electromagnetic shielding circuit is arranged on the circuit board so as to protect the mutual inductor from the influence of internal electromagnetic interference and external electromagnetic interference. A rectangular hole 8 is arranged in the cylindrical convex column 7; the shell 1 is made of insulating materials, such as plastic materials.
The U-shaped mutual inductance frame 2 is provided with a bottom conductive block 9, a left side upright conductive block 10, a right side upright conductive block 11 and a pin arrangement component 5 which are horizontally placed, wherein the left side upright conductive block 10 and the right side upright conductive block 11 are vertically placed on one side of the bottom conductive block 9, the left side upright conductive block 10 and the right side upright conductive block 11 are of an integral structure which is manufactured integrally, the U-shaped mutual inductance frame is formed by forging after bending by a bending machine, the upper part of the right side upright conductive block 11 is provided with a circular hole 12, the upper part of the left side upright conductive block 10 is provided with an opening circular hole 14, the opening circular hole 14 is opened outwards for being in close fit with a shell component, a clamping protrusion 13 is arranged below the opening circular hole 14, and the left side upright conductive block 10 penetrates through the shell 1 through the rectangular hole 8.
The voltage sampling needle 3 is rectangular shape, is equipped with needle-like sampling head in its one end, and the sampling needle head can be sharp shape, cooperates the pointed slot of external circuit board, and the sampling needle head is the circular, cooperates the circular slot of external circuit board, is equipped with two probe holes 15 that are in the same place side by side at its other end, the bottom of bottom conducting block 9 is equipped with two circular protruding 16 that are in the same place side by side, circular protruding 16 imbeds in corresponding probe hole 15.
Two parallel pin-arranging grooves 17 are arranged on one side surface of the upper U-shaped 4, a circular clamping ring is arranged at the bottom of each pin-arranging groove 17, two circuit interfaces are respectively arranged in each pin-arranging groove 17, two pin-arranging parts which are equidistant from the pin-arranging grooves 17 are arranged on each pin-arranging part 5, and the pin-arranging parts 5 are inserted into the corresponding pin-arranging grooves 17 and are connected with the corresponding circuit interfaces.
The pin arranging part 5 is L-shaped, and the head part is provided with a round chuck or a pointed chuck.
A clamping groove is arranged in the shell 1, and after the left vertical conductive block 10 passes through the shell, the clamping protrusion 13 is embedded with the clamping groove. Barbs which are reversed in one direction are arranged in the rectangular holes 8.
According to the invention, the shell and the U-shaped mutual induction frame are tightly embedded through the clamping protrusions, so that the loosening phenomenon between the shell and the U-shaped mutual induction frame is effectively avoided, and further, the safety accident that large current leaks to the shell is avoided; after the voltage sampling needle is installed, the voltage sampling needle and the bottom conductive block are completely embedded together, and are mutually tightly embedded, so that the voltage is stable in value, and the problem of poor contact is effectively solved. Meanwhile, the voltage sampling needle and the shell form a compact structure.
Claims (8)
1. The utility model provides a high protection ammeter current transformer, includes casing, U-shaped mutual-inductance frame and voltage sampling needle, characterized by: the cross section of the shell is a closed body formed by two sections of U-shaped and two sections of circular arcs, wherein one U-shaped forms the bottom of the shell and is marked as a lower U-shape, two ends of the U-shaped are respectively connected with one ends of the two circular arc-shaped bodies, the other U-shaped is marked as an upper U-shape, two ends of the U-shaped are respectively connected with the other ends of the two circular arc-shaped bodies, a cylindrical convex column is arranged in the shell, the cylindrical convex column and the shell are integrated, and a rectangular hole is formed in the cylindrical convex column;
The U-shaped mutual inductor comprises a bottom conductive block, a left side upright conductive block, a right side upright conductive block and a pin arrangement component which are horizontally placed, wherein the left side upright conductive block and the right side upright conductive block are vertically placed on one side of the bottom conductive block, the left side upright conductive block and the right side upright conductive block are of an integrally manufactured integral structure, a circular hole is formed in the upper portion of the right side upright conductive block, an opening circular hole is formed in the upper portion of the left side upright conductive block, a clamping protrusion is arranged below the opening circular hole, and the left side upright conductive block penetrates through the shell through the rectangular hole.
2. The high protection ammeter current transformer of claim 1, wherein: the voltage sampling needle is of a strip shape, one end of the voltage sampling needle is provided with a needle-shaped sampling head, the other end of the voltage sampling needle is provided with two probe holes which are arranged side by side, the bottom of the bottom conductive block is provided with two circular protrusions which are arranged side by side, and the circular protrusions are embedded in the corresponding probe holes.
3. The high protection ammeter current transformer of claim 1, wherein: two parallel pin-arranging grooves are formed in one side face of the upper U-shaped structure, two circuit interfaces are respectively arranged in the pin-arranging grooves, two pin-arranging parts which are equidistant from the pin-arranging grooves are arranged on the pin-arranging parts, and the pin-arranging parts are inserted into the corresponding pin-arranging grooves and are connected with the corresponding circuit interfaces.
4. The high protection ammeter current transformer of claim 1, wherein: the shell is internally provided with a clamping groove, and after the left vertical conductive block passes through the shell, the clamping protrusion is embedded with the clamping groove.
5. The high protection ammeter current transformer of claim 1, wherein: the needle arranging part is L-shaped, and the head of the needle arranging part is provided with a round chuck or a pointed chuck.
6. The high protection ammeter current transformer of claim 1, wherein: barbs which are reversed in one direction are arranged on the inner wall of the rectangular hole.
7. A high protection ammeter current transformer according to claim 3, wherein: a circular clamping ring is arranged at the bottom of the needle arranging groove.
8. The high protection ammeter current transformer of any one of claims 1, 2, 4, 5, 6 or 7, wherein: the cylindrical convex column is provided with a circuit board and an induction coil, and the circuit board can effectively prevent electromagnetic interference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410175332.7A CN118039290A (en) | 2024-02-07 | 2024-02-07 | High protection ammeter current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410175332.7A CN118039290A (en) | 2024-02-07 | 2024-02-07 | High protection ammeter current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118039290A true CN118039290A (en) | 2024-05-14 |
Family
ID=91001761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410175332.7A Pending CN118039290A (en) | 2024-02-07 | 2024-02-07 | High protection ammeter current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118039290A (en) |
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2024
- 2024-02-07 CN CN202410175332.7A patent/CN118039290A/en active Pending
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