CN108987081B - Primary shielding structure of four-sleeve elbow-type head grounding voltage transformer - Google Patents
Primary shielding structure of four-sleeve elbow-type head grounding voltage transformer Download PDFInfo
- Publication number
- CN108987081B CN108987081B CN201811094346.7A CN201811094346A CN108987081B CN 108987081 B CN108987081 B CN 108987081B CN 201811094346 A CN201811094346 A CN 201811094346A CN 108987081 B CN108987081 B CN 108987081B
- Authority
- CN
- China
- Prior art keywords
- shielding
- connecting rod
- end cap
- cylindrical
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010410 layer Substances 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002356 single layer Substances 0.000 claims abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 4
- 230000005684 electric field Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
-
- 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
- H01F38/22—Instruments transformers for single phase ac
- H01F38/24—Voltage transformers
- H01F38/26—Constructions
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
Abstract
The invention discloses a primary shielding structure of a four-sleeve elbow-type head grounding voltage transformer, which belongs to the technical field of voltage transformers and is characterized in that: at least comprises: the inner terminal comprises an end cap and a connecting rod which are integrally formed, and the end cap and the connecting rod are of cylindrical structures and coaxial; the outer diameter of the end cap is larger than that of the connecting rod; a through hole is formed in the central shaft of the inner terminal; the external terminal comprises a cylindrical end body, one end of the end body is provided with a blind hole, and the connecting rod is fixedly connected with the end body through threads after being inserted into the blind hole; the shielding cage comprises a cylindrical pipe part, and one end of the cylindrical pipe is inwards bent and contracted to form a round hole; the side wall of the cylindrical tube comprises a single-layer part with the thickness of one layer of shielding net and an overlapped area with the thickness of two layers of shielding nets; the overlapping area is provided with a tin welding spot; the end cap is located within the shielding cage and the outer terminal is located outside the shielding cage. The high-voltage electric field is shielded effectively, and capacitance distribution is improved.
Description
Technical Field
The invention belongs to the technical field of voltage transformers, and particularly relates to a primary shielding structure of a four-sleeve elbow-type head grounding voltage transformer.
Background
As is well known, a voltage transformer (PT), also abbreviated as TV and YH, is a sensor for acquiring voltage information of an electric primary circuit by secondary equipment such as a measuring instrument and relay protection in an electric power system. PT converts the high voltage into low voltage in proportion, namely 100V, 100/V3V and 100/3V, the PT is connected with a primary system in a primary side way, and a secondary side measuring instrument, relay protection and the like; mainly electromagnetic (capacitive voltage transformer is widely used), and non-electromagnetic, such as electronic and photoelectric.
The mutual inductor standard GB20840 specifies that the partial discharge test should be performed under the voltage of induction, and the partial discharge level of the grounding voltage mutual inductor is required to be 1.2Um less than or equal to 50pc, and 1.2 Um/. Cndot.3 less than or equal to 20pc. However, with the release of requirements of a southern power grid in recent years, the performance requirements on the transformer are more and more strict, the partial discharge is required to be less than 10PC and even less than 5PC, and the partial discharge under the induction test is required to meet the requirements besides the partial discharge under the induction test due to different acceptance standards of different factories.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a primary shielding structure of a four-sleeve elbow-type head grounding voltage transformer. The invention combines the special structure of the elbow type head transformer and designs an inner terminal, an outer terminal and a cylinder type shielding net (shielding cage). The barrel type shielding net is arranged between the inner terminal and the outer terminal to form a whole, and the design can effectively shield a high-voltage electric field and improve capacitance distribution. The requirement of partial discharge under the voltage of the power frequency test can be met.
The specific technical scheme adopted by the invention is as follows:
a primary shielding structure of a four-sleeve elbow-type head grounding voltage transformer at least comprises:
the inner terminal (1), the inner terminal (1) comprises an end cap (1-1) and a connecting rod (1-2) which are integrally formed, and the end cap (1-1) and the connecting rod (1-2) are both in cylindrical structures and coaxial; the outer diameter of the end cap (1-1) is larger than that of the connecting rod (1-2); a through hole (1-3) is formed in the central shaft of the inner end (1);
the external terminal (2), the external terminal (2) comprises a cylindrical end body (2-1), a blind hole (2-2) is formed in one end of the end body (2-1), and the connecting rod (1-2) is fixedly connected with the end body (2-1) through threads after being inserted into the blind hole (2-2);
a shielding cage (3) made of a rectangular shielding net, wherein the shielding cage (3) comprises a cylindrical pipe part, and one end of the cylindrical pipe is inwards bent and contracted to form a round hole; the side wall of the cylindrical tube comprises a single-layer part with the thickness of one layer of shielding net and an overlapped area (5) with the thickness of two layers of shielding nets; a tin welding spot (4) is arranged in the overlapping area (5); the end cap (1-1) is positioned in the shielding cage (3), the outer terminal (2) is positioned outside the shielding cage (3), and the round hole is positioned at the joint part of the end cap (1-1) and the end body (2-1).
The invention has the advantages and positive effects that:
by adopting the technical scheme, the invention has the following technical effects:
1. the shielding effect is good; the partial discharge of the formed voltage transformer can be controlled to be less than 5PC under the voltage of 1.2 Um.
2. The operability is strong: after the wire netting is cut according to the size requirement, the wire netting can be manufactured by using a shaping welding mould, and the wire netting cutting machine is simple to operate and suitable for mass production.
3. The installation is convenient: and (3) mounting the manufactured shielding cage on the inner terminal and the outer terminal, and sleeving the shielding cage on the die mandrel.
4. The voltage regulator can be used for the product, and can also be used for the similar elbow-type head voltage products, and the applicability is strong.
Drawings
FIG. 1 is a block diagram of a preferred embodiment of the invention;
FIG. 2 is a semi-sectional view of the inner terminal in the preferred embodiment of the invention;
FIG. 3 is a semi-sectional view of the outer terminal in the preferred embodiment of the invention;
FIG. 4 is a block diagram of a shielding cage in accordance with a preferred embodiment of the invention;
fig. 5 is a connection diagram of an inner terminal and an outer terminal in a preferred embodiment of the invention;
FIG. 6 is a diagram showing the construction of a casting body of an elbow-type head grounding voltage transformer according to a preferred embodiment of the invention;
fig. 7 is an enlarged view of a portion a in fig. 6.
Wherein: 1. an inner terminal; 1-1, end caps; 1-2, connecting rod; 1-3, through holes; 2. an outer terminal; 2-1, end body; 2-2, blind holes; 3. a shielding cage; 4. a tin solder joint; 5. an overlap region; 6. a resin sleeve.
Detailed Description
For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings.
The structure of the present invention will be described in detail with reference to the accompanying drawings.
Please refer to fig. 1 to 7: a primary shielding structure of a four-sleeve elbow-type head-grounded voltage transformer, comprising:
the inner terminal 1 comprises an end cap 1-1 and a connecting rod 1-2 which are integrally formed, wherein the end cap 1-1 and the connecting rod (1-2) are of cylindrical structures and are coaxial; the outer diameter of the end cap 1-1 is larger than that of the connecting rod 1-2; a through hole 1-3 is formed in the central shaft of the inner end (1);
the external terminal 2 comprises a cylindrical end body 2-1, a blind hole 2-2 is formed in one end of the end body 2-1, and the connecting rod 1-2 is fixedly connected with the end body 2-1 through threads after being inserted into the blind hole 2-2;
a shielding cage 3 made of a rectangular shielding net, wherein the shielding cage 3 comprises a cylindrical pipe part, and one end of the cylindrical pipe is inwards bent and contracted to form a round hole; the side wall of the cylindrical tube comprises a single-layer part with the thickness of one layer of shielding net and an overlapped area 5 with the thickness of two layers of shielding nets; a tin welding spot 4 is arranged in the overlapped area 5; the end cap 1-1 is positioned in the shielding cage 3, the outer terminal 2 is positioned outside the shielding cage 3, and the round hole is positioned at the joint part of the end cap 1-1 and the end body 2-1.
The terminals and the shielding net are integrally cast in the sleeve. When the fuse is connected with the inner terminal and has voltage passing, the capacitor distribution formed between the fuse and the transformer body can be effectively shielded, the field intensity is improved, and the purpose of reducing partial discharge under the power frequency test is achieved.
The primary terminal of the product shown in fig. 1 can effectively fix a barrel type shielding net, namely a shielding cage by adopting an inner terminal and outer terminal split mode. After the cylindrical shielding net is cut according to the size requirement, the cylindrical shielding net can be manufactured by using a shaping welding mould. During manufacturing, the folded side is rolled on the inner side of the cylinder, the welding is firm, the tin welding spot is required to be smooth and flat, no burr is generated, the operation is simple, and the method is suitable for mass production.
The shield mesh is mounted with the terminals as shown in fig. 3. The method can effectively fix the shielding net, and the shielding net is sleeved on the core shaft of the mold sleeve when the mold is assembled, and the primary terminal is fixed. The process can effectively shield the high-voltage electric field and improve the capacitance distribution. Thereby greatly reducing the partial discharge value under the power frequency pressure resistance and meeting the requirements of customers.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, but any simple modification, equivalent variation and modification of the above embodiments according to the technical principles of the present invention are within the scope of the technical solutions of the present invention.
Claims (1)
1. A four sleeve pipe elbow formula head ground voltage transformer primary shield structure, its characterized in that: at least comprises:
the inner terminal (1), the inner terminal (1) comprises an end cap (1-1) and a connecting rod (1-2) which are integrally formed, and the end cap (1-1) and the connecting rod (1-2) are both in cylindrical structures and coaxial; the outer diameter of the end cap (1-1) is larger than that of the connecting rod (1-2); a through hole (1-3) is formed in the central shaft of the inner end (1);
the external terminal (2), the external terminal (2) comprises a cylindrical end body (2-1), a blind hole (2-2) is formed in one end of the end body (2-1), and the connecting rod (1-2) is fixedly connected with the end body (2-1) through threads after being inserted into the blind hole (2-2);
a shielding cage (3) made of a rectangular shielding net, wherein the shielding cage (3) comprises a cylindrical pipe part, and one end of the cylindrical pipe is inwards bent and contracted to form a round hole; the side wall of the cylindrical tube comprises a single-layer part with the thickness of one layer of shielding net and an overlapped area (5) with the thickness of two layers of shielding nets; a tin welding spot (4) is arranged in the overlapping area (5); the end cap (1-1) is positioned in the shielding cage (3), the outer terminal (2) is positioned outside the shielding cage (3), and the round hole is positioned at the joint part of the end cap (1-1) and the end body (2-1); the terminals and the shielding net are integrally cast in the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811094346.7A CN108987081B (en) | 2018-09-19 | 2018-09-19 | Primary shielding structure of four-sleeve elbow-type head grounding voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811094346.7A CN108987081B (en) | 2018-09-19 | 2018-09-19 | Primary shielding structure of four-sleeve elbow-type head grounding voltage transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108987081A CN108987081A (en) | 2018-12-11 |
| CN108987081B true CN108987081B (en) | 2024-03-08 |
Family
ID=64546354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811094346.7A Active CN108987081B (en) | 2018-09-19 | 2018-09-19 | Primary shielding structure of four-sleeve elbow-type head grounding voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108987081B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2731298A1 (en) * | 1995-03-03 | 1996-09-06 | Alcatel Mobile Comm France | Radio communication terminal box with test facilities |
| JPH10208962A (en) * | 1997-01-22 | 1998-08-07 | Nissin Electric Co Ltd | Gas insulated current transformer |
| US5938475A (en) * | 1996-04-17 | 1999-08-17 | Contact Gmbh Elektrische Bauelemente | Connector for a cable having at least one wire |
| JP2010015708A (en) * | 2008-07-01 | 2010-01-21 | Yazaki Corp | Shield connector |
| CN201590322U (en) * | 2009-10-28 | 2010-09-22 | 大连中广互感器制造有限公司 | Anti-foul voltage transformer with small partial discharge |
| CN202383185U (en) * | 2011-11-29 | 2012-08-15 | 青岛特锐德电气股份有限公司 | Non-contact type electronic voltage sampling device |
| CN203103772U (en) * | 2012-12-28 | 2013-07-31 | 上海市电力公司 | A grounding structure used for a bypass cable |
| CN203397883U (en) * | 2013-08-06 | 2014-01-15 | 湖南大北互互感器有限公司 | Electromagnetic voltage transformer of intra-user single-phase built-in fuse |
| CN204855621U (en) * | 2015-06-03 | 2015-12-09 | 烟台东方威思顿电气股份有限公司 | Electrified source and electrically conductive shielded plug -type voltage sensor |
| CN108493657A (en) * | 2018-05-22 | 2018-09-04 | 镇江申庭电子科技有限公司 | A kind of firm formula connector inner wire |
| CN208767143U (en) * | 2018-09-19 | 2019-04-19 | 天津市百利纽泰克电气科技有限公司 | Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5240522B2 (en) * | 2009-04-13 | 2013-07-17 | 住友電装株式会社 | connector |
| JP5990846B2 (en) * | 2011-11-25 | 2016-09-14 | 矢崎総業株式会社 | Manufacturing method of shield structure and manufacturing method of wire harness |
| US9960504B2 (en) * | 2016-01-12 | 2018-05-01 | Yazaki Corporation | Shielded connector |
-
2018
- 2018-09-19 CN CN201811094346.7A patent/CN108987081B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2731298A1 (en) * | 1995-03-03 | 1996-09-06 | Alcatel Mobile Comm France | Radio communication terminal box with test facilities |
| US5938475A (en) * | 1996-04-17 | 1999-08-17 | Contact Gmbh Elektrische Bauelemente | Connector for a cable having at least one wire |
| JPH10208962A (en) * | 1997-01-22 | 1998-08-07 | Nissin Electric Co Ltd | Gas insulated current transformer |
| JP2010015708A (en) * | 2008-07-01 | 2010-01-21 | Yazaki Corp | Shield connector |
| CN201590322U (en) * | 2009-10-28 | 2010-09-22 | 大连中广互感器制造有限公司 | Anti-foul voltage transformer with small partial discharge |
| CN202383185U (en) * | 2011-11-29 | 2012-08-15 | 青岛特锐德电气股份有限公司 | Non-contact type electronic voltage sampling device |
| CN203103772U (en) * | 2012-12-28 | 2013-07-31 | 上海市电力公司 | A grounding structure used for a bypass cable |
| CN203397883U (en) * | 2013-08-06 | 2014-01-15 | 湖南大北互互感器有限公司 | Electromagnetic voltage transformer of intra-user single-phase built-in fuse |
| CN204855621U (en) * | 2015-06-03 | 2015-12-09 | 烟台东方威思顿电气股份有限公司 | Electrified source and electrically conductive shielded plug -type voltage sensor |
| CN108493657A (en) * | 2018-05-22 | 2018-09-04 | 镇江申庭电子科技有限公司 | A kind of firm formula connector inner wire |
| CN208767143U (en) * | 2018-09-19 | 2019-04-19 | 天津市百利纽泰克电气科技有限公司 | Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108987081A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103339813B (en) | Electrical barrier devices for the transmission line burble point of HVDC Transmission part | |
| CN105185559A (en) | Medium and high voltage type combined electronic transformer | |
| CN108987081B (en) | Primary shielding structure of four-sleeve elbow-type head grounding voltage transformer | |
| CN208767143U (en) | Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure | |
| CN103337681B (en) | Ground current isolator for radio frequency signals | |
| CN108428535B (en) | A kind of twisted core spiral line type inductor | |
| CN204989400U (en) | A integral type high -voltage testing transformer for insulating oily withstanding voltage tester | |
| CN205229261U (en) | Electric capacity type high voltage equipment | |
| CN205376278U (en) | Take compound inslation dry -type voltage transformer of fuse protection | |
| CN209843481U (en) | Multi-turn link type sulfur hexafluoride gas insulation current transformer | |
| CN207459991U (en) | Passive electrodeless strand core cable porcelain Jie's punching power-supply filter | |
| CN204375522U (en) | High frequency transformer | |
| CN104332258B (en) | The high-voltage wall bushing improved | |
| CN202871949U (en) | Current isolator | |
| CN210780544U (en) | High-voltage EMI filter | |
| CN2343690Y (en) | Inhibitor for sparking plug cap of motorcycle | |
| CN112185670A (en) | Common mode inductor and preparation method thereof | |
| CN202796522U (en) | Excitation-free tap switch shielding cover | |
| CN201773690U (en) | Hairpin type current transformer used for high-voltage direct current | |
| CN101728074A (en) | Wrapping technical method for primary shield of bus-type current transformer | |
| CN205646348U (en) | Radio frequency connector of integrated arrester | |
| JP2020113723A (en) | Vacuum capacitor type instrument transformer | |
| CN216133749U (en) | High-frequency transformer shielding layer | |
| CN214226654U (en) | Pull-cage type structure composite casing zinc oxide lightning arrester | |
| CN216353934U (en) | Vacuum circuit breaker sleeve on post |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |