CN212625148U - Balance current transformer - Google Patents
Balance current transformer Download PDFInfo
- Publication number
- CN212625148U CN212625148U CN202021770781.XU CN202021770781U CN212625148U CN 212625148 U CN212625148 U CN 212625148U CN 202021770781 U CN202021770781 U CN 202021770781U CN 212625148 U CN212625148 U CN 212625148U
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- shell
- current transformer
- shield assembly
- upper cover
- shielding
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Abstract
The utility model relates to a balanced current transformer, which comprises an outer shell, the shell on be provided with the upper cover, the shell in be provided with two upper and lower shield assembly, shield assembly in be provided with coil pack, coil pack include the iron core, the iron core on the winding have the enameled wire, the shell on still be connected with the lead wire subassembly, the lead wire subassembly with the tin that wards off of enameled wire is fixed, and will through insulating adhesive tape lead wire subassembly and shield assembly winding are fixed, during the encapsulation, the clearance distance between shield assembly and left and right sides shell and the upper cover is less than 1cm, and the structure is compacter, has reduced installation space, and space utilization improves greatly, does not influence the performance simultaneously again.
Description
Technical Field
The utility model belongs to the technical field of the mutual-inductor technique and specifically relates to a balanced current transformer is moulded case circuit breaker in using.
Background
The current transformer has the following functions: the current in the lines of power generation, transformation, transmission, distribution and utilization is very different, from several amperes to several tens of thousands of amperes. For the convenience of measurement, protection and control, conversion to a more uniform current is required, and in addition, the voltage on the line is generally higher, which is very dangerous if the direct measurement is carried out. The current transformer plays the role of current transformation and electric isolation.
The existing plastic case circuit breaker applied to the balance current transformer has various defects, and in order to achieve the balance current of 1500A, the structure is complex, the size is large, and a large installation space is needed, so that the structure is simplified and the installation size is reduced by a method on the premise of unchanged performance.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the problems of the background art described above, an improved balanced current transformer is provided.
The utility model provides a technical scheme that its technical problem adopted is: a balanced current transformer comprises a shell, wherein an upper cover is arranged on the shell, an upper shielding device and a lower shielding device are arranged in the shell, a coil assembly is arranged in the shielding device and comprises an iron core, an enameled wire is wound on the iron core, a lead assembly is connected to the shell, the lead assembly is fixed with tin lining of the enameled wire and is wound and fixed with the shielding device through an insulating adhesive tape, and the gap distance between the shielding device and the upper cover and between the shielding device and the upper cover is smaller than 1 cm;
furthermore, the shielding device of the present invention comprises a shielding case and a shielding plate disposed in the shielding case, which can effectively shield the leakage flux generated by other coils and prevent the leakage flux from being affected by an external magnetic field;
furthermore, the shielding sheet of the utility model is embedded on the inner wall of the shielding cover, is made of inverse magnetic material copper or aluminum, and can be made of alloy material according to the requirement;
furthermore, the shell and the upper cover of the utility model are also wound and fixed by the insulating adhesive tape;
further, the lead wire subassembly include the lead wire, the tip of lead wire is provided with plastic terminal and metal terminal.
The utility model has the advantages that: the defects in the background technology are overcome, and through a more reasonable structure and a more compact layout, the circuit has the advantages of small volume, reduced installation space and capability of achieving 1500A balance current, so that the circuit is stable and reliable in application, and the phenomenon of switch misoperation caused by large instantaneous current cannot occur.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of the present invention;
fig. 2 is an enlarged view of the structure of the shielding device at a in the present invention.
In the figure: 1. the transformer comprises a shell, 2 parts of an upper cover, 3 parts of an iron core, 4 parts of an enameled wire, 5 parts of a shielding cover, 6 parts of a shielding sheet, 7 parts of a lead, 8 parts of a plastic terminal and 9 parts of a metal terminal.
Detailed Description
The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
The embodiment of the utility model relates to a balanced current transformer as shown in fig. 1 and fig. 2, which comprises a housing, the housing 1 on be provided with upper cover 2, the housing 1 in be provided with two upper and lower shield assemblies, the shield assembly in be provided with coil assembly, coil assembly include iron core 3, the iron core 3 on twine have enameled wire 4, the housing 1 on still be connected with lead wire assembly, lead wire assembly with the enameled wire 4 tin-lined fixed, and through insulating sticky tape with lead wire assembly and shield assembly winding fixed, during the encapsulation, the clearance distance between shield assembly and left and right housings 1 and upper cover 2 is less than 1 cm; the shielding device comprises a shielding cover 5 and a shielding sheet 6 arranged in the shielding cover 5, and can effectively shield leakage magnetic flux generated by other coils so as to prevent the leakage magnetic flux from being influenced by an external magnetic field; the shielding sheet 6 is embedded on the inner wall of the shielding cover 5, is made of an inverse magnetic material aluminum, and can be made of an alloy material according to requirements; the shell 1 and the upper cover 2 are also wound and fixed through an insulating tape; the lead assembly comprises a lead 7, and a plastic terminal 8 and a metal terminal 9 are arranged at the end part of the lead 7.
The detection of the balance current transformer comprises:
1. input leakage current of 30mA, load of 540 ohm, output voltage of 7.5mv,
2. and (3) balance current testing: the 1-phase and 2-phase test currents are more than 1500A
3. And (3) balance current testing: the 1-phase and 3-phase test currents are more than 1500A
4. And (3) balance current testing: the 1-phase and 4-phase test currents are more than 1500A
5. And (3) balance current testing: the 2-phase and 3-phase test currents are more than 1500A
6. And (3) balance current testing: the 2-phase and 4-phase test currents are greater than 1500A.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (5)
1. A balanced current transformer, characterized by: including shell (1), shell (1) on be provided with upper cover (2), shell (1) in be provided with two upper and lower shield assembly, shield assembly in be provided with coil pack, coil pack include iron core (3), iron core (3) on the winding have enameled wire (4), shell (1) on still be connected with lead wire subassembly, lead wire subassembly with the tin-lined of enameled wire (4) is fixed, and will through insulating adhesive tape lead wire subassembly and shield assembly winding are fixed, during the upper cover encapsulation, shield assembly respectively with the left and right sides shell (1) and the clearance distance between upper cover (2) be less than 1 cm.
2. The balanced current transformer of claim 1, wherein: the shielding device comprises a shielding cover (5) and a shielding sheet (6) arranged in the shielding cover (5).
3. The balanced current transformer of claim 2, wherein: the shielding sheet (6) is embedded on the inner wall of the shielding cover (5) and is made of inverse magnetic material copper or aluminum.
4. The balanced current transformer of claim 1, wherein: the shell (1) and the upper cover (2) are also wound and fixed through an insulating tape.
5. The balanced current transformer of claim 1, wherein: the lead assembly comprises a lead (7), and a plastic terminal (8) and a metal terminal (9) are arranged at the end part of the lead (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021770781.XU CN212625148U (en) | 2020-08-21 | 2020-08-21 | Balance current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021770781.XU CN212625148U (en) | 2020-08-21 | 2020-08-21 | Balance current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212625148U true CN212625148U (en) | 2021-02-26 |
Family
ID=74713552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021770781.XU Active CN212625148U (en) | 2020-08-21 | 2020-08-21 | Balance current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212625148U (en) |
-
2020
- 2020-08-21 CN CN202021770781.XU patent/CN212625148U/en active Active
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