CN108987081A - Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure - Google Patents
Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure Download PDFInfo
- Publication number
- CN108987081A CN108987081A CN201811094346.7A CN201811094346A CN108987081A CN 108987081 A CN108987081 A CN 108987081A CN 201811094346 A CN201811094346 A CN 201811094346A CN 108987081 A CN108987081 A CN 108987081A
- Authority
- CN
- China
- Prior art keywords
- end cap
- connecting rod
- thickness
- screening cage
- external 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.)
- Granted
Links
- 238000012216 screening Methods 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 8
- 230000008602 contraction Effects 0.000 claims abstract description 4
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 239000002356 single layer Substances 0.000 claims abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 4
- 230000005684 electric field Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 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
- 238000012360 testing method Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses a kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structures, belong to voltage transformer technical field, it is characterized by: including at least: inner terminal, external terminal and screening cage, inner terminal includes integrally formed end cap and connecting rod, end cap and connecting rod are cylindrical structure, and the two is coaxial；The outer diameter of end cap is greater than the outer diameter of connecting rod；Through-hole is offered on the central axis of inner terminal；External terminal includes cylindrical end body, holds one end of body to offer blind hole, is fixedly connected by screw thread with end body after connecting rod insertion blind hole；Screening cage includes cylindrical tube part, and the contraction that bends inwards of one end of cylindrical tube is encircled into a circular hole；The side wall of cylindrical tube includes the overlapping region for shielding the single-layer portions of thickness of net with a thickness of one layer and shielding thickness of net with a thickness of two layers；Overlapping region is equipped with tin welding spot；End cap is located in screening cage, and the external terminal is located at outside screening cage.This patent effectively shields high voltage electric field, improves capacitance profile.
Description
Technical field
The invention belongs to voltage transformer technical field more particularly to a kind of Quadruplet pipe elbow-type head earthed voltage transformers one
Secondary shielding construction.
Background technique
It is well known that voltage transformer (PT), also there is abbreviation TV and YH, it is measuring instrumentss in electric system, relay
The secondary devices such as protection obtain the sensor of electrical primary loop voltage information.High voltage is converted into low-voltage by PT in proportion,
That is 100V, 100/ √ 3V and 100/3V, PT is once flanked in primary system, secondary to flank measuring instrumentss, relay protection etc.；Mainly
It is electromagnetic type (capacitance type potential transformer is widely used), separately there is non electromagnetic, such as electronic type, photo-electric.
Regulation local discharge test should carry out under induced voltage in mutual inductor standard GB20840, and earthed voltage transformer office
Zoom level requires 1.2Um≤50pc, 3≤20pc of 1.2Um/ √.But in recent years with the publication that south electric network requires, to mutual inductor
Performance requirement be increasingly stringenter, it is desirable that partial discharge < 10PC even < 5PC, and due to the acceptance criteria of different manufacturers difference, remove
Consider that partial discharge is qualified outer under induced test, also requires partial discharge under industrial frequency experiment to meet the requirements.
Summary of the invention
In view of the drawbacks of the prior art, the present invention provides a kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding knot
Structure.The special construction of present invention combination elbow-type head mutual inductor, devises interior external terminal and cartridge type gauze screen (screening cage).Tub screen
One entirety of formation between interior external terminal will be mounted on by covering net, this design can effectively shield high voltage electric field, improve capacitance profile.
It can satisfy the requirement of partial discharge under industrial frequency experiment voltage.
It is of the present invention the specific technical proposal is:
A kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure, includes at least:
Inner terminal (1), the inner terminal (1) include integrally formed end cap (1-1) and connecting rod (1-2), the end cap
(1-1) and connecting rod (1-2) are cylindrical structure, and the two is coaxial；The outer diameter of the end cap (1-1) is greater than connecting rod (1-2)
Outer diameter；Through-hole (1-3) is offered on the central axis of the inner terminal (1)；
External terminal (2), the external terminal (2) include cylindrical end body (2-1), are opened in one end of the end body (2-1)
Equipped with blind hole (2-2), connecting rod (1-2) insertion blind hole (2-2) is fixedly connected by screw thread with end body (2-1) afterwards；
The screening cage made of rectangular shield net (3), the screening cage (3) includes cylindrical tube part, the cylindrical tube
One end contraction that bends inwards is encircled into a circular hole；The side wall of the cylindrical tube includes the single layer that thickness of net is shielded with a thickness of one layer
Part and the overlapping region (5) that thickness of net is shielded with a thickness of two layers；Tin welding spot (4) are equipped in the overlapping region (5)；The end
Cap (1-1) is located in screening cage (3), and the external terminal (2) is located at screening cage (3) outside, and the circular hole is located at end cap (1-1) and end
The binding site of body (2-1).
Advantages of the present invention and good effect are as follows:
By using above-mentioned technical proposal, the present invention is had the following technical effect that:
1, shield effectiveness is good；It can control the partial discharge < 5PC under 1.2Um voltage of the voltage transformer after forming.
2, strong operability: wire netting being required after cutting out according to size, i.e., can be made of shaping welding positioner,
It is easy to operate, it is suitble to produce in enormous quantities.
3, easy for installation: the screening cage that will be made is mounted on interior external terminal, then is sleeved on die core axle.
4, it can be not only used for the product, can be also used for similar elbow-type head product of voltage, strong applicability.
Detailed description of the invention
Fig. 1 is the structure chart of invention preferred embodiment；
Fig. 2 is the half-sectional sectional view of inner terminal in invention preferred embodiment；
Fig. 3 is the half-sectional sectional view of external terminal in invention preferred embodiment；
Fig. 4 is the structure chart of screening cage in invention preferred embodiment；
Fig. 5 is the connection figure of inner terminal and external terminal in invention preferred embodiment；
Fig. 6 is that invention preferred embodiment elbow-type head earthed voltage transformer pours building body structure chart；
Fig. 7 is the enlarged drawing of part A in Fig. 6.
Wherein: 1, inner terminal；1-1, end cap；1-2, connecting rod；1-3, through-hole；2, external terminal；2-1, end body；It is 2-2, blind
Hole；3, screening cage；4, tin welding spot；5, overlapping region；6, resin sleeve.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and cooperate attached drawing
Detailed description are as follows.
Structure of the invention is explained in detail with reference to the accompanying drawing.
Fig. 1 is please referred to Fig. 7: a kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure, comprising:
Inner terminal 1, the inner terminal 1 include integrally formed end cap 1-1 and connecting rod 1-2, the end cap 1-1 and connection
Bar (1-2) is cylindrical structure, and the two is coaxial；The outer diameter of the end cap 1-1 is greater than the outer diameter of connecting rod 1-2；Described interior
Through-hole 1-3 is offered on the central axis of terminal (1)；
External terminal 2, the external terminal 2 include cylindrical end body 2-1, offer blind hole in one end of the end body 2-1
It is fixedly connected by screw thread with end body 2-1 after 2-2, the connecting rod 1-2 insertion blind hole 2-2；
The screening cage 3 made of rectangular shield net, the screening cage 3 include cylindrical tube part, one end of the cylindrical tube
The contraction that bends inwards is encircled into a circular hole；The side wall of the cylindrical tube includes the single-layer portions that thickness of net is shielded with a thickness of one layer
With the overlapping region 5 for shielding thickness of net with a thickness of two layers；Tin welding spot 4 is equipped in the overlapping region 5；The end cap 1-1 is located at
In screening cage 3, the external terminal 2 is located at outside screening cage 3, and the circular hole is located at end cap 1-1 and holds the binding site of body 2-1.
Terminal and gauze screen is integrated poured in casing.It, can when fuse connect with inner terminal and has voltage to pass through
The capacitance profile formed between fuse and mutual inductor body is effectively shielded, improves field strength, to reach reduction industrial frequency experiment
The purpose of lower partial discharge.
A terminal of product thus shown in Fig. 1, can effectively fix cartridge type gauze screen using interior external terminal fission mode, i.e.,
Screening cage.Cartridge type gauze screen requires after cutting out according to size, i.e., can be made of shaping welding positioner.It will folding when production
Avris rolls on the inside of cylinder, with scolding tin firm welding, it is desirable that tin welding spot is smooth, smooth, impulse- free robustness, easy to operate, is suitble to big
Batch production.
Gauze screen and terminal are installed together, as shown in Figure 3.The method can effective fixed mask net, will screen when die-filling
Net cover is covered on mould casing mandrel, fixes a terminal.This technique can effectively shield high voltage electric field, improve capacitor
Distribution.To which the partial discharge numerical value under industrial frequency withstand voltage greatly reduce, meets the needs of client.
The above is only the preferred embodiments of the present invention, and is not intended to limit the present invention in any form,
Any simple modification made to the above embodiment according to the technical essence of the invention, equivalent variations and modification, belong to
In the range of technical solution of the present invention.
Claims (1)
1. a kind of Quadruplet pipe elbow-type head earthed voltage transformer primary shielding structure, it is characterised in that: include at least:
Inner terminal (1), the inner terminal (1) include integrally formed end cap (1-1) and connecting rod (1-2), the end cap (1-1)
It is cylindrical structure with connecting rod (1-2), and the two is coaxial；The outer diameter of the end cap (1-1) is outer greater than connecting rod (1-2)
Diameter；Through-hole (1-3) is offered on the central axis of the inner terminal (1)；
External terminal (2), the external terminal (2) include cylindrical end body (2-1), are offered in one end of the end body (2-1)
Blind hole (2-2), connecting rod (1-2) insertion blind hole (2-2) are fixedly connected by screw thread with end body (2-1) afterwards；
The screening cage made of rectangular shield net (3), the screening cage (3) includes cylindrical tube part, one end of the cylindrical tube
The contraction that bends inwards is encircled into a circular hole；The side wall of the cylindrical tube includes the single-layer portions that thickness of net is shielded with a thickness of one layer
With the overlapping region (5) for shielding thickness of net with a thickness of two layers；Tin welding spot (4) are equipped in the overlapping region (5)；The end cap
(1-1) is located in screening cage (3), and the external terminal (2) is located at screening cage (3) outside, and the circular hole is located at end cap (1-1) and end body
The binding site of (2-1).
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 true CN108987081A (en) | 2018-12-11 |
| CN108987081B 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 (14)
| 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 |
| US20100261365A1 (en) * | 2009-04-13 | 2010-10-14 | Sumitomo Wiring Systems, Ltd. | Connector |
| 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 for bypass cables |
| 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 |
| US20140318852A1 (en) * | 2011-11-25 | 2014-10-30 | Yazaki Corporation | Shield structure and wire harness |
| 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 |
| US20170201034A1 (en) * | 2016-01-12 | 2017-07-13 | Yazaki Corporation | Shielded connector |
| 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 |
-
2018
- 2018-09-19 CN CN201811094346.7A patent/CN108987081B/en active Active
Patent Citations (14)
| 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 |
| US20100261365A1 (en) * | 2009-04-13 | 2010-10-14 | Sumitomo Wiring Systems, Ltd. | 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 |
| US20140318852A1 (en) * | 2011-11-25 | 2014-10-30 | Yazaki Corporation | Shield structure and wire harness |
| 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 for bypass cables |
| 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 |
| US20170201034A1 (en) * | 2016-01-12 | 2017-07-13 | Yazaki Corporation | Shielded connector |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN108987081B (en) | 2024-03-08 |
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