CN109285658B - Mutual inductor and leakage circuit breaker - Google Patents
Mutual inductor and leakage circuit breaker Download PDFInfo
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- CN109285658B CN109285658B CN201710593213.3A CN201710593213A CN109285658B CN 109285658 B CN109285658 B CN 109285658B CN 201710593213 A CN201710593213 A CN 201710593213A CN 109285658 B CN109285658 B CN 109285658B
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- 230000009286 beneficial effect Effects 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
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Abstract
The invention relates to the field of piezoelectric devices, in particular to a transformer, especially a transformer with a shielding structure, and also relates to a leakage point breaker comprising the transformer; the transformer comprises a coil assembly, a transformer shielding shell sleeved outside the coil assembly and a transformer shell sleeved outside the transformer shielding shell; the transformer shell comprises an upper half shell and a lower half shell matched with the upper half shell; the transformer shielding shell comprises a shielding ring and a shielding cover matched with the shielding ring; during assembly, the shell connecting seam between the upper half shell and the lower half shell is arranged in a staggered manner with the shielding shell connecting seam between the shielding ring and the shielding cover; the leakage breaker comprises the transformer; the mutual inductor has the advantages of simple structure, good performance of shielding external electromagnetic interference and accurate action of the residual current circuit breaker.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to a transformer, and particularly relates to a transformer with a shielding structure, and an electric leakage breaker comprising the transformer.
Background
The transformer is an important component of the residual current circuit breaker, and the existing transformer mainly has the following problems:
1. The shielding shell is not arranged, so that the transformer is easy to be interfered by external electromagnetic signals, and the circuit breaker comprising the transformer is caused to malfunction by external electromagnetic interference;
2. The mutual inductor is provided with a mutual inductor shielding shell, and the shielding shell connecting seam of the mutual inductor is arranged opposite (or close to) to the shell connecting seam of the mutual inductor, so that the performance of shielding the external electromagnetic interference of the mutual inductor shielding shell is deteriorated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the transformer with simple structure and good performance of shielding external electromagnetic interference and the leakage circuit breaker with accurate action.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The transformer comprises a coil assembly 3, a transformer shielding shell sleeved outside the coil assembly 3 and a transformer shell sleeved outside the transformer shielding shell;
The transformer housing comprises an upper half shell 12 and a lower half shell 11 matched with the upper half shell 12; the transformer shielding shell comprises a shielding ring 21 and a shielding cover 22 matched with the shielding ring 21; during assembly, the shell connection joint between the upper half shell 12 and the lower half shell 11 and the shield shell connection joint between the shield ring 21 and the shield shell 22 are arranged in a staggered manner.
Preferably, the connection seam of the shielding shell of the transformer shielding shell is an annular gap and is coaxial with the transformer; the shell connecting seam of the transformer shell is an annular seam, and the upper side surface and the lower side surface of the shell connecting seam are perpendicular to the axial direction of the transformer.
Preferably, the shield shell connecting seam of the transformer shield shell is positioned at one axial end of the shield shell, and the shell connecting seam of the transformer shell is positioned at the axial middle part of the shield shell and positioned at the outer side of the axial middle part of the shield shell (22).
Preferably, the shielding ring 21 is in an annular sheet structure, an annular opening is arranged at one side of the shielding cover 22, the shielding ring 21 is matched with the annular opening, and the shielding ring 21 is clamped at the opening end of the shielding cover 22 to form a shielding cavity for accommodating the coil assembly 3.
Preferably, the shielding case (22) comprises a shielding case annular bottom wall 223, and a shielding case inner cylinder wall 222 and a shielding case outer cylinder wall 221 which are respectively arranged at the inner edge and the outer edge of the shielding case annular bottom wall 223, wherein the shielding case inner cylinder wall 222 and the shielding case outer cylinder wall 221 extend to one side of the shielding case annular bottom wall 223 and are same in height, and the shielding case outer cylinder wall 221 is provided with a shielding case wire slot 224 for wiring the coil assembly 3;
The shielding ring 21 comprises an annular body 211, the inner diameter and the outer diameter of the annular body 211 are respectively matched with the outer diameter of the inner cylinder wall 222 of the shielding case and the inner diameter of the outer cylinder wall 221 of the shielding case, and shielding ring inserting sheets 212 matched with the wire slots 224 of the shielding case are arranged on the outer edge of the annular body 211 in a protruding mode.
Preferably, the width of the shield slots 224 matches the width of the insert 212, and the length of the shield slots 224 > the length of the shield ring insert 212.
Preferably, the upper half shell 12 includes an upper half shell annular bottom wall 123, an upper half shell inner cylinder wall 122 and an upper half shell outer cylinder wall 121 which are respectively arranged at the inner edge and the outer edge of the upper half shell annular bottom wall 123 and extend towards the same side of the upper half shell annular bottom wall 123, and the upper half shell outer cylinder wall 121 is provided with a shell wire slot 124 for routing the coil assembly 3; the lower half shell 11 comprises a lower half shell annular bottom wall 113, a lower half shell inner cylinder wall 112 and a lower half shell outer cylinder wall 111 which are respectively arranged at the inner edge and the outer edge of the lower half shell annular bottom wall 113 and extend to the same side of the lower half shell annular bottom wall 113;
The inner diameter and outer diameter of the upper half shell annular bottom wall 123 are respectively the same as those of the lower half shell annular bottom wall 113, the inner diameter and outer diameter of the upper half shell inner cylinder wall 122 are respectively the same as those of the lower half shell inner cylinder wall 112, and the inner diameter and outer diameter of the upper half shell outer cylinder wall 121 are respectively the same as those of the lower half shell outer cylinder wall 111.
Preferably, the upper half shell inner cylinder wall 122 is the same height as the lower half shell inner cylinder wall 112, and the upper half shell outer cylinder wall 121 and the lower half shell outer cylinder wall 111 are the same height.
Preferably, the ratio of the inner diameter of the transformer housing to the axial thickness of the transformer housing is 15:8.
Preferably, the upper half shell 12 and the lower half shell 11 have different colors, the upper half shell 12 corresponds to the shielding ring 21, and the lower half shell 11 corresponds to the shielding cover 22.
Preferably, a first gap exists between the transformer shell and the transformer shielding shell, and a second gap exists between the transformer shielding shell and the coil assembly 3.
An electric leakage breaker comprises the transformer.
The mutual inductor comprises the mutual inductor shielding shell, so that the coil assembly is positioned in a continuous shielding space formed by the mutual inductor shielding shell, most of external electromagnetic interference can be shielded, and the connecting seam of the shielding shell of the mutual inductor shielding shell and the connecting seam of the shell of the mutual inductor are arranged in a staggered manner, thereby being beneficial to further improving the performance of the mutual inductor for shielding the external electromagnetic interference, and further ensuring the sampling accuracy of the mutual inductor. In addition, the connecting seam of the shielding shell is an annular seam which is coaxial with the transformer, the connecting seam of the shell is an annular seam, the upper side surface and the lower side surface of the connecting seam are perpendicular to the axial direction of the transformer, and the opening directions of the connecting seam of the shielding shell and the connecting seam of the shell are different, so that the performance of shielding external electromagnetic interference of the transformer is further improved; the shielding ring comprises shielding ring inserting pieces, the shielding cover comprises shielding cover wire grooves, the shielding ring inserting pieces are matched with the shielding cover wire grooves, the shielding ring inserting pieces can fill the opening area of the shielding cover wire grooves, and the influence of the shielding cover wire grooves on the shielding shell shielding external electromagnetic interference performance of the transformer and magnetic leakage from the shielding cover wire grooves are reduced. The leakage circuit breaker can effectively avoid the situation of misoperation caused by external electromagnetic interference.
Drawings
FIG. 1 is a schematic diagram of an exploded construction of a transformer of the present invention;
FIG. 2 is a schematic view of the structure of the lower half shell of the present invention;
FIG. 3 is a schematic view of the structure of the upper half shell of the present invention;
FIG. 4 is a schematic view of the structure of the shield of the present invention;
FIG. 5 is a schematic view of the structure of the shield ring of the present invention;
Fig. 6 is a schematic diagram of an assembled structure of the transformer of the present invention.
Detailed Description
Specific embodiments of the transformer of the present invention are further described below with reference to the examples shown in fig. 1-6. The transformer of the present invention is not limited to the description of the following embodiments.
The invention relates to a transformer, which comprises a coil assembly 3, a transformer shielding shell sleeved outside the coil assembly 3 and a transformer shell sleeved outside the transformer shielding shell; the transformer housing comprises an upper half shell 12 and a lower half shell 11 matched with the upper half shell 12; the transformer shielding shell comprises a shielding ring 21 and a shielding cover 22 matched with the shielding ring 21; during assembly, the shell connection joint between the upper half shell 12 and the lower half shell 11 and the shield shell connection joint between the shield ring 21 and the shield cover 22 are arranged in a staggered manner.
The existing transformer has the following problems: 1. the shielding shell is not arranged, so that the transformer is easy to be subjected to external electromagnetic interference, and the circuit breaker comprising the transformer is subjected to electromagnetic signal interference to perform misoperation; 2. the shield shell connecting seam of the transformer is arranged opposite (or close to) to the shell connecting seam of the transformer, so that the performance of shielding the external electromagnetic interference of the shield shell of the transformer is deteriorated. The mutual inductor comprises the mutual inductor shielding shell, so that the coil assembly is positioned in a continuous shielding space formed by the mutual inductor shielding shell, most of external electromagnetic interference can be shielded, and the connecting seam of the shell and the connecting seam of the shielding shell are arranged in a staggered manner, thereby being beneficial to further improving the performance of the mutual inductor for shielding the external electromagnetic interference, further improving the sampling accuracy of the mutual inductor and further avoiding the situation of misoperation of a circuit breaker comprising the mutual inductor.
The transformer of the present invention will be further described with reference to the drawings and the specific embodiments.
As shown in fig. 1, one embodiment of the transformer of the present invention is shown.
The mutual inductor of the invention comprises a coil assembly 3, a mutual inductor shielding shell sleeved outside the coil assembly 3 and a mutual inductor shell sleeved outside the mutual inductor shielding shell, wherein the mutual inductor shielding shell is arranged at the outer side of the mutual inductor shielding shell.
The coil assembly 3 comprises a ring-shaped iron core, a coil winding wound on the ring-shaped iron core and a connecting wire connected with the coil winding. The transformer shielding shell comprises a shielding ring 21 with an annular sheet structure and a shielding cover 22 matched with the shielding ring 21, an annular opening is formed in the upper end of the shielding cover 22, the shielding ring 21 is matched with the annular opening of the shielding cover 22 and is clamped at the opening end of the shielding cover 22, the shielding cover 22 and the shielding ring 21 are matched to form a continuous shielding cavity for accommodating the coil assembly 3, and the shielding cover 22 is provided with a shielding cover wire slot 224 for wiring the coil assembly 3. The transformer shell comprises an upper half shell 12 at the lower side and a lower half shell 11 at the lower side, wherein the lower half shell 11 is matched with the upper half shell 12, an annular groove with a downward opening is formed in the middle of the upper half shell 12, an annular groove with an upward opening is formed in the middle of the lower half shell 11, the annular groove of the upper half shell 12 and the annular groove opening of the lower half shell 11 are oppositely matched to form an annular accommodating cavity for accommodating a transformer shielding shell, the upper half shell 12 is provided with a shell wire groove 124 for wiring a coil assembly 3, and the shell wire groove 124 is matched with the shielding cover wire groove 224.
When the transformer is assembled, as shown in the direction of fig. 6, the shielding ring 21 is clamped at the opening end of the lower end of the shielding cover 22, so that a shielding shell connecting seam between the shielding ring 21 and the shielding cover 22 is positioned at the axial lower end of the shielding shell of the transformer, and the shielding shell connecting seam is an annular seam and is coaxial with the transformer; the upper half shell 12 and the lower half shell 11 are matched relatively and connected through the adhesive tape 4, so that a shell connecting seam of the transformer shell is positioned in the middle of the shell connecting seam and is positioned on the outer side of the middle of the transformer shielding shell, the shell connecting seam is an annular seam, and the upper side surface and the lower side surface of the shell connecting seam (namely the plane where the side edges of the shell connecting seam formed by the upper half shell and the lower half shell of the shell) are perpendicular to the axial direction of the transformer; the opening directions of the connecting seam of the shielding shell and the connecting seam of the shell are different, and the opening directions are staggered, so that the performance of shielding external electromagnetic interference of the shielding shell of the transformer is better, and the sampling accuracy of the transformer is ensured.
It should be noted that, the positional relationship between the connection seam of the shield shell and the connection seam of the housing is not limited to the relationship shown in fig. 6 of the foregoing embodiment and the description, and the larger the positional deviation between the connection seam of the shield shell and the connection seam of the housing is, the more beneficial to improving the performance of shielding external electromagnetic interference of the shield shell of the present invention; the upper half shell 12 and the lower half shell 11 can be connected through not only the adhesive tape 4, but also glue bonding, and any connecting mode of the prior art which can realize the connection of the upper half shell 12 and the lower half shell 11 can be adopted; the positions of the shield slots 224 and the housing slots 124 may also be adjusted as desired, but are required to meet the basic functions for routing the coil assembly 3.
Preferably, as shown in fig. 6, a first gap exists between the transformer shielding shell and the transformer shell, and a second gap exists between the coil assembly 3 and the transformer shielding shell, and the two gaps are beneficial to further improving the performance of shielding the transformer shielding shell from external electromagnetic interference.
The constituent elements of the present invention will be further described below with reference to the drawings and the specific embodiments.
In the direction shown in fig. 4, the shielding case 22 of the shielding case of the transformer comprises a shielding case annular bottom wall 223, and a shielding case inner cylinder wall 222 and a shielding case outer cylinder wall 221 which are respectively arranged at the inner edge and the outer edge of the shielding case annular bottom wall 223, wherein the shielding case inner cylinder wall 222 and the shielding case outer cylinder wall 221 are respectively extended upwards from the shielding case annular bottom wall 223, and are both high, the shielding case inner cylinder wall 223 and the shielding case outer cylinder wall 221 are matched to form an annular groove arranged in the middle of the shielding case 22, the inner diameter and the outer diameter of the annular groove are respectively matched with the inner diameter and the outer diameter of the annular body 211 of the shielding ring 21, and the shielding case outer cylinder wall 221 is provided with a shielding case wire slot 224 for wiring the coil assembly 3.
As shown in fig. 5, the shield ring 21 of the transformer shield case includes an annular body 211.
Preferably, as shown in fig. 5, the outer edge of the annular body 211 of the shielding ring 21 is convexly provided with shielding ring inserting pieces 212, the width of the shielding ring inserting pieces 212 is matched with the width of the shielding case wire slot 224 of the shielding case 22, and the length of the shielding ring inserting pieces 212 is less than the length of the shielding case wire slot 224. The shield shell slot 224 is matched with the shield ring inserting piece 212, so that the shield shell 22 and the shield ring 21 are matched more firmly, a limit effect is formed on the connecting wire of the coil assembly 3, wire enamel removal and or wire breakage of a coil winding of the coil assembly 3 caused by poor movement of the connecting wire and/or the coil assembly are avoided, the shield ring inserting piece 212 can fill the opening area of the shield shell slot 224, and therefore magnetic flux leakage at the shield shell slot 224 and interference generated by external electromagnetic interference at the shield shell slot 224 are reduced, and the performance of shielding external electromagnetic interference of the transformer shield shell is improved further.
Preferably, the shielding cover 22 and the shielding ring 21 may be connected by an interference fit, and of course, may be connected by glue bonding or the like.
Compared with the prior art, the transformer shielding shell provided by the invention has the advantages that the assembly gap can be remarkably reduced, a more continuous and tight shielding cavity for the coil assembly 3 is formed, the coil assembly 3 is completely wrapped in the transformer shielding shell, and the performance of shielding external electromagnetic interference is better. Further, the assembly of the shielding cover 22 and the shielding ring 21 is realized in an interference fit manner, so that glue can be avoided, the environment is protected, and the situation that an assembly gap is enlarged due to the glue is avoided.
As shown in fig. 3, the upper half shell 12 of the transformer housing includes an upper half shell annular bottom wall 123, an upper half shell inner wall 122 and an upper half shell outer wall 121 respectively disposed at the inner edge and the outer edge of the upper half shell annular bottom wall 123, the upper half shell inner wall 122 and the upper half shell outer wall 121 both extend upwards from the upper half shell annular bottom wall 123 and are both high, an annular groove is disposed in the middle of the upper half shell 12, a housing slot 124 is disposed in the upper half shell outer wall 121, and the upper half shell outer wall 121 is used in cooperation with a shield slot 224 of the shield 22 for routing the coil assembly 3; in the direction shown in fig. 2, the lower half shell 11 of the transformer housing includes a lower half shell annular bottom wall 113, a lower half shell inner cylinder wall 112 and a lower half shell outer cylinder wall 111 which are respectively arranged at the inner edge and the outer edge of the lower half shell annular bottom wall 113, the lower half shell outer cylinder wall 111 and the lower half shell inner cylinder wall 112 are both extended upwards from the lower half shell annular bottom wall 113 and are both high, and an annular groove is arranged in the middle of the lower half shell 11.
Preferably, the inner diameter and outer diameter of the upper half shell annular bottom wall 123 are respectively the same as the inner diameter and outer diameter of the lower half shell annular bottom wall 113, the inner diameter and outer diameter of the upper half shell inner cylinder wall 122 are respectively the same as the inner diameter and outer diameter of the lower half shell inner cylinder wall 112, and the inner diameter and outer diameter of the upper half shell outer cylinder wall 121 are respectively the same as the inner diameter and outer diameter of the lower half shell outer cylinder wall 111; the axial thickness of the upper half shell 12 is the same as that of the lower half shell 11, that is, the height of the upper half shell inner cylinder wall 122 is the same as that of the lower half shell inner cylinder wall 112, and the height of the upper half shell outer cylinder wall 121 is the same as that of the lower half shell outer cylinder wall 111.
Preferably, the upper and lower half shells 12 and 11 are made of insulating material having a uniform thickness.
Preferably, the ratio of the inner diameter D of the transformer housing (i.e., the inner diameter of the upper half shell inner wall 122 or the inner diameter of the lower half shell inner wall 112) to the axial thickness H of the transformer housing is 15:8. The size of the transformer shell is convenient for the current-carrying wire of the large-current-specification circuit breaker to pass through from the middle of the transformer, and the shell thickness of the transformer shell can also be used as a secondary side of the transformer.
Preferably, as shown in fig. 1, the colors of the upper half shell 12 and the lower half shell 11 are different (not shown in the figure), the upper half shell 12 and the shielding ring 21 are located on one side of the coil assembly 3, and the lower half shell 11 and the shielding cover 22 are located on the other side of the coil assembly 3. After the assembly of the transformer of the present invention is completed, the positions of the shield ring 21 and the shield case 22 can be determined by the difference in color between the upper and lower half cases 12 and 11.
The assembly mode of the mutual inductor is as follows:
(1) Placing the opening of the lower half shell 11 of the transformer shell horizontally upwards, and then placing the shielding ring 21 into the annular groove of the lower half shell 11;
(2) Placing the coil assembly 3 into an annular groove of the lower half shell 11;
(3) Aligning the shield wire slots 224 of the shield 22 with the shield ring inserts 212 of the shield ring 21, placing the connecting wires of the coil assembly 3 into the shield wire slots 224, and then placing the shield 22 into the annular groove of the lower half shell 11 so that the shield ring 21 is completely clamped into the open end of the shield 22;
(4) The housing slot 124 of the upper half shell 12 with the opening downward is aligned with the shield slot 224, the connection wire of the coil assembly 3 is put into the housing slot 124, the upper half shell 12 is assembled with the lower half shell 11, and the upper half shell 12 and the lower half shell 11 are adhered together with the adhesive tape 4.
The leakage circuit breaker comprises the transformer.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. The transformer comprises a coil assembly (3), a transformer shielding shell sleeved outside the coil assembly (3) and a transformer shell sleeved outside the transformer shielding shell;
The method is characterized in that: the transformer shell comprises an upper half shell (12) and a lower half shell (11) matched with the upper half shell (12); the transformer shielding shell comprises a shielding ring (21) and a shielding cover (22) matched with the shielding ring (21); during assembly, a shell connecting seam between the upper half shell (12) and the lower half shell (11) and a shielding shell connecting seam between the shielding ring (21) and the shielding cover (22) are arranged in a staggered manner; the connection seam of the shielding shell of the transformer shielding shell is an annular gap and is coaxial with the transformer; the shell connecting seam of the transformer shell is an annular seam, and the upper side surface and the lower side surface of the shell connecting seam are perpendicular to the axial direction of the transformer;
the shielding ring (21) is of an annular sheet structure, an annular opening is formed in one side of the shielding cover (22), the shielding ring (21) is matched with the annular opening, and the shielding ring (21) is clamped at the opening end of the shielding cover (22) to form a shielding cavity for accommodating the coil assembly (3);
The connecting seam of the shielding shell of the transformer shielding shell is positioned at one axial end of the shielding shell, and the connecting seam of the housing of the transformer is positioned at the axial middle part of the housing and is positioned at the outer side of the axial middle part of the shielding shell (22);
The shielding cover (22) comprises a shielding cover annular bottom wall (223), and a shielding cover inner cylinder wall (222) and a shielding cover outer cylinder wall (221) which are respectively arranged at the inner edge and the outer edge of the shielding cover annular bottom wall (223), wherein the shielding cover inner cylinder wall (222) and the shielding cover outer cylinder wall (221) extend to one side of the shielding cover annular bottom wall (223) and are same in height, and the shielding cover outer cylinder wall (221) is provided with a shielding cover wire slot (224) for wiring the coil assembly (3);
The shielding ring (21) comprises an annular body (211), the inner diameter and the outer diameter of the annular body (211) are respectively matched with the outer diameter of the inner cylinder wall (222) of the shielding cover and the inner diameter of the outer cylinder wall (221) of the shielding cover, and shielding ring inserting sheets (212) matched with the wire slots (224) of the shielding cover are arranged on the outer edge of the annular body (211) in a protruding mode.
2. The transformer according to claim 1, wherein: the width of the shield wire slot (224) is matched with the width of the insert (212), and the length of the shield wire slot (224) is greater than the length of the shield ring insert (212).
3. The transformer according to claim 1, wherein: the upper half shell (12) comprises an upper half shell annular bottom wall (123), an upper half shell inner cylinder wall (122) and an upper half shell outer cylinder wall (121) which are respectively arranged at the inner edge and the outer edge of the upper half shell annular bottom wall (123) and extend towards the same side of the upper half shell annular bottom wall (123), and the upper half shell outer cylinder wall (121) is provided with a shell wire slot (124) for wiring the coil assembly (3); the lower half shell (11) comprises a lower half shell annular bottom wall (113), a lower half shell inner cylinder wall (112) and a lower half shell outer cylinder wall (111) which are respectively arranged at the inner edge and the outer edge of the lower half shell annular bottom wall (113) and extend to the same side of the lower half shell annular bottom wall (113);
The inner diameter and the outer diameter of the upper half shell annular bottom wall (123) are respectively the same as those of the lower half shell annular bottom wall (113), the inner diameter and the outer diameter of the upper half shell inner cylinder wall (122) are respectively the same as those of the lower half shell inner cylinder wall (112), and the inner diameter and the outer diameter of the upper half shell outer cylinder wall (121) are respectively the same as those of the lower half shell outer cylinder wall (111).
4. A transformer according to claim 3, wherein: the upper half shell inner cylinder wall (122) is the same as the lower half shell inner cylinder wall (112), and the upper half shell outer cylinder wall (121) and the lower half shell outer cylinder wall (111) are the same.
5. A transformer according to claim 3, wherein: the ratio of the inner diameter of the transformer housing to the axial thickness of the transformer housing is 15:8.
6. The transformer according to claim 1, wherein: the colors of the upper half shell (12) and the lower half shell (11) are different, the upper half shell (12) corresponds to the shielding ring (21), and the lower half shell (11) corresponds to the shielding cover (22).
7. The transformer according to claim 1, wherein: a first gap exists between the transformer shell and the transformer shielding shell, and a second gap exists between the transformer shielding shell and the outside of the coil assembly (3).
8. An earth leakage breaker, characterized in that: comprising the transformer of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710593213.3A CN109285658B (en) | 2017-07-19 | 2017-07-19 | Mutual inductor and leakage circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710593213.3A CN109285658B (en) | 2017-07-19 | 2017-07-19 | Mutual inductor and leakage circuit breaker |
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| CN109285658A CN109285658A (en) | 2019-01-29 |
| CN109285658B true CN109285658B (en) | 2024-05-14 |
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| CN110767428B (en) * | 2019-11-07 | 2020-08-18 | 安徽昭田电子科技有限公司 | Magnetic core coil component and manufacturing method of magnetic core |
| CN110690022B (en) * | 2019-11-11 | 2021-06-08 | 安徽昭田电子科技有限公司 | Assembled magnetic core and production process thereof |
| JP7305031B2 (en) * | 2020-10-26 | 2023-07-07 | 株式会社トーキン | current sensor |
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| JPH05152148A (en) * | 1991-11-26 | 1993-06-18 | Mitsubishi Electric Corp | Zero-phase current detection apparatus |
| JPH06267396A (en) * | 1993-03-16 | 1994-09-22 | Hitachi Ltd | Zero-phase current transformer |
| JP2000331854A (en) * | 1999-05-18 | 2000-11-30 | Tokin Corp | Zero-phase current transformer |
| KR20090055713A (en) * | 2007-11-29 | 2009-06-03 | 태화트랜스 주식회사 | Current sensor with a rogowski coil |
| KR20090007053U (en) * | 2008-01-08 | 2009-07-13 | 동아전기공업 주식회사 | Zero current transformor is united current transformor |
| JP2015095323A (en) * | 2013-11-11 | 2015-05-18 | 富士電機機器制御株式会社 | Leakage current detection device for leakage circuit breaker |
| JP2016201512A (en) * | 2015-04-14 | 2016-12-01 | 富士電機機器制御株式会社 | Zero-phase current transformer |
| CN205103362U (en) * | 2015-11-11 | 2016-03-23 | 常熟开关制造有限公司(原常熟开关厂） | After -current transformer |
| KR20170074700A (en) * | 2015-12-22 | 2017-06-30 | 주식회사 아모그린텍 | Housing with magnetic shielding for current transformer and current transformer with magnetic shielding comprising same |
| CN207082398U (en) * | 2017-07-19 | 2018-03-09 | 浙江正泰电器股份有限公司 | Transformer and RCCB |
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| CN109285658A (en) | 2019-01-29 |
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