CN219738729U - Anti-interference through type current transformer with electromagnetic balance function - Google Patents
Anti-interference through type current transformer with electromagnetic balance function Download PDFInfo
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- CN219738729U CN219738729U CN202321163025.4U CN202321163025U CN219738729U CN 219738729 U CN219738729 U CN 219738729U CN 202321163025 U CN202321163025 U CN 202321163025U CN 219738729 U CN219738729 U CN 219738729U
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- 238000004804 winding Methods 0.000 claims abstract description 65
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model is suitable for the technical field of current transformers, and provides an anti-interference through type current transformer with an electromagnetic balance function. This anti-interference through type current transformer with electromagnetic balance function through setting up secondary balance winding and shielding layer structure, and this design has realized secondary winding's electromagnetic balance and anti-electromagnetic interference's shielding layer and the combination of through type current transformer for its electric property of through type current transformer does not receive the interference of other factors in the operation process, has improved the stability and the security of electric power system operation greatly, has provided an effectual implementation means for electric power system safe and reliable operation, thereby has improved the practicality of device.
Description
Technical Field
The utility model belongs to the technical field of current transformers, and particularly relates to an anti-interference through type current transformer with an electromagnetic balance function.
Background
The gas-insulated metal-enclosed switchgear has the characteristics of small occupied area, high intelligent degree, no maintenance, full working condition and the like. The method is widely applied. The current transformer in the cabinet is arranged in the cable chamber, the primary cable passes through the inner hole of the transformer, and the large current on the primary conductor is converted into the small current which is convenient for metering, measuring and relay protection through the electromagnetic induction principle. Current transformers for inflatable cabinets used in the current power industry generally contain multiple signal acquisition units for monitoring and protection of secondary loop DTU measurement and control units.
Because the position can not be centered in the transformer hole when once high-voltage cable passes the transformer hole, make current transformer iron core magnetic field distribution inhomogeneous, and the installation is being hugged closely to the three-phase transformer, three-phase interval is less, make current transformer can receive near the electromagnetic interference that the transformer and near the conductor heavy current to lead to transformer secondary output data distortion, can not be with the accurate feedback of primary loop information to secondary protection device, easily cause phenomenon such as "malfunction" or "refusing action", make protection device can't realize accurate protection and monitoring function, harm equipment and life safety.
Disclosure of Invention
The utility model provides an anti-interference through type current transformer with an electromagnetic balance function, and aims to solve the problems that a common current transformer is easy to cause 'misoperation' or 'refusal operation', and the like, so that a protection device cannot realize accurate protection and monitoring functions, equipment is damaged, and life safety is damaged.
The utility model is realized in such a way that the anti-interference through type current transformer with the electromagnetic balance function comprises a device shell, an O-shaped iron core and a secondary winding;
the iron core is fixedly connected to the inside of the device shell, the secondary winding is wound on the outer surface of the iron core, a shielding layer structure is arranged on the outer surface of the secondary winding, and a secondary balance winding is wound on the outer surface of the shielding layer structure;
the shielding layer structure comprises an outer shielding ring and an inner shielding ring which are fixedly connected to the outer ring surface and the inner ring surface of the secondary winding, side shielding rings are fixedly connected to the surfaces of two sides of the secondary winding, and the two side shielding rings, the outer shielding ring and the inner shielding ring are mutually connected to form an O-shaped frame body which wraps the secondary winding and the iron core in the inner cavity of the frame body.
Preferably, an epoxy resin layer is arranged outside the secondary balance winding.
Preferably, the two side shielding rings, the outer shielding ring and the inner shielding ring are all silicon steel sheets.
Preferably, insulating layers are arranged between the secondary winding and the two side shielding rings, and between the outer shielding ring and the inner shielding ring.
Preferably, the secondary balance winding is uniformly divided into four sections and two layers by adopting enameled wires, and the first layer of two-section winding and the second layer of two-section winding are respectively connected through homopolar ends.
Preferably, the outer surface of the device housing is fixedly connected with a secondary lead.
Advantageous effects
Compared with the prior art, the utility model has the beneficial effects that: according to the anti-interference through type current transformer with the electromagnetic balance function, through the arrangement of the secondary balance winding and the shielding layer structure, the combination of the electromagnetic balance of the secondary winding and the electromagnetic interference resistance shielding layer and the through type current transformer is realized, so that the electrical performance of the through type current transformer is not interfered by other factors in the operation process, the operation stability and safety of an electric power system are greatly improved, an effective implementation means is provided for safe and reliable operation of the electric power system, and the practicability of the device is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of the secondary winding and its external structure according to the present utility model;
FIG. 2 is a schematic view showing the internal structure of the device housing of the present utility model;
fig. 3 is a schematic structural diagram of a secondary winding and shielding layer structure in the present utility model.
In the figure: 1. a device housing; 2. an iron core; 3. a secondary winding; 4. an outer shield ring; 5. a side shield ring; 6. an inner shield ring; 7. a secondary balance winding; 8. an epoxy resin layer; 9. and (5) secondary lead wires.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1-3, the present utility model provides a technical solution: an anti-interference through type current transformer with an electromagnetic balance function comprises a device shell 1, an O-shaped iron core 2 and a secondary winding 3;
the iron core 2 is fixedly connected to the inside of the device shell 1, the secondary winding 3 is wound on the outer surface of the iron core 2, a shielding layer structure is arranged on the outer surface of the secondary winding 3, and a secondary balance winding 7 is wound on the outer surface of the shielding layer structure;
the shielding layer structure comprises an outer shielding ring 4 and an inner shielding ring 6 which are fixedly connected to the outer ring surface and the inner ring surface of the secondary winding 3, side shielding rings 5 are fixedly connected to the two side surfaces of the secondary winding 3, and the two side shielding rings 5, the outer shielding ring 4 and the inner shielding ring 6 are mutually connected to form an O-shaped frame body to wrap the secondary winding 3 and the iron core 2 in the inner cavity of the frame body.
And the secondary balance winding 7 is uniformly divided into four sections and two layers by adopting enameled wires, and the first layer of two-section winding and the second layer of two-section winding are respectively connected by homopolar ends.
Insulating layers are arranged between the secondary winding 3 and the two side shielding rings 5, and between the outer shielding ring 4 and the inner shielding ring 6.
In the embodiment, the secondary winding 3 of the transformer is externally sleeved with a layer shielding structure, the secondary balance winding 7 is arranged on the outer side of the shielding structure, the secondary winding 3 is provided with four sections of independent winding wires, the four sections of winding wires are specifically divided into two layers, each layer is divided into two sections, the secondary balance winding 7 is uniformly divided into four sections by enameled wires, the two sections of windings of the first layer and the two sections of windings of the second layer are respectively connected by homopolar ends, the combination of electromagnetic balance and adjacent conductor interference and a current transformer is realized, the problem that the transformer error is unqualified due to the fact that the position of a cable cannot be fixed when the primary cable passes through an inner hole of the current transformer is solved, and the problem that the transformer error is unqualified due to the interference of the adjacent conductor to the transformer in a switch cabinet is solved.
Further, the outer portion of the secondary balance winding 7 is provided with an epoxy resin layer 8.
In this embodiment, the epoxy resin has a certain insulation property, and has a relatively good sealing property, and is used for protecting the internal structure of the device.
Further, the two side shielding rings 5, the outer shielding ring 4 and the inner shielding ring 6 are all silicon steel sheets.
In the embodiment, the two side shielding rings 5 are covered on the end surfaces of the two sides of the insulated winding by adopting 5 layers of 0.5mm silicon steel sheets, the outer shielding ring 4 and the inner shielding ring 6 are respectively wound on the inner ring and the outer ring of the insulated winding by adopting 5 layers of 0.23mm silicon steel sheets, and the whole secondary winding 3 is wrapped inside the shielding layers.
Further, the outer surface of the device housing 1 is fixedly connected with a secondary lead 9.
In the present embodiment, the secondary lead 9 is electrically connected to the secondary winding 3 and the secondary balance winding 7 through wires.
The working principle and the using flow of the utility model are as follows: after the transformer is installed, a layer shielding structure is sleeved outside the secondary winding 3 of the transformer, a secondary balance winding 7 is arranged outside the shielding structure, the secondary winding 3 is provided with four sections of independent winding wires, the four sections of winding wires are specifically divided into two layers, each layer is divided into two sections, the secondary balance winding 7 is uniformly divided into four sections by enameled wires, the two sections of windings of the first layer and the two sections of windings of the second layer are respectively connected by homopolar ends, the design realizes the combination of electromagnetic balance and adjacent conductor interference with a current transformer, solves the problem that the transformer error is unqualified due to the fact that the position of a cable cannot be unfixed when the primary cable passes through an inner hole of the current transformer, and improves the problem that the transformer error is unqualified due to the interference of adjacent conductors to the transformer in a switch cabinet, can accurately output signals in the operation process, provides an effective implementation means for a protection device and a measuring instrument, and provides safe and reliable operation for a power system.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (6)
1. An anti-interference through type current transformer with electromagnetic balance function is characterized in that: comprises a device shell (1), an O-shaped iron core (2) and a secondary winding (3);
the iron core (2) is fixedly connected to the inside of the device shell (1), the secondary winding (3) is wound on the outer surface of the iron core (2), a shielding layer structure is arranged on the outer surface of the secondary winding (3), and a secondary balance winding (7) is wound on the outer surface of the shielding layer structure;
the shielding layer structure comprises an outer shielding ring (4) and an inner shielding ring (6) which are fixedly connected to the outer ring surface and the inner ring surface of the secondary winding (3), side shielding rings (5) are fixedly connected to the two side surfaces of the secondary winding (3), the two side shielding rings (5), the outer shielding ring (4) and the inner shielding ring (6) are mutually connected to form an O-shaped frame body, and the secondary winding (3) and the iron core (2) are wrapped in the inner cavity of the frame body.
2. An anti-interference through type current transformer with electromagnetic balance function as defined in claim 1, wherein: an epoxy resin layer (8) is arranged outside the secondary balance winding (7).
3. An anti-interference through type current transformer with electromagnetic balance function as defined in claim 1, wherein: the two side shielding rings (5), the outer shielding ring (4) and the inner shielding ring (6) are all silicon steel sheets.
4. An anti-interference through type current transformer with electromagnetic balance function as defined in claim 1, wherein: insulating layers are arranged between the secondary winding (3) and the two side shielding rings (5), and between the outer shielding ring (4) and the inner shielding ring (6).
5. An anti-interference through type current transformer with electromagnetic balance function as defined in claim 1, wherein: the secondary balance winding (7) is uniformly divided into four sections and two layers by adopting enameled wires, and the first layer of two-section winding and the second layer of two-section winding are respectively connected through homopolar ends.
6. An anti-interference through type current transformer with electromagnetic balance function as defined in claim 1, wherein: the outer surface of the device shell (1) is fixedly connected with a secondary lead (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321163025.4U CN219738729U (en) | 2023-05-15 | 2023-05-15 | Anti-interference through type current transformer with electromagnetic balance function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321163025.4U CN219738729U (en) | 2023-05-15 | 2023-05-15 | Anti-interference through type current transformer with electromagnetic balance function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219738729U true CN219738729U (en) | 2023-09-22 |
Family
ID=88027645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321163025.4U Active CN219738729U (en) | 2023-05-15 | 2023-05-15 | Anti-interference through type current transformer with electromagnetic balance function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219738729U (en) |
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2023
- 2023-05-15 CN CN202321163025.4U patent/CN219738729U/en active Active
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