CN105551776A - Novel resin cast dry-type grounding transformer - Google Patents
Novel resin cast dry-type grounding transformer Download PDFInfo
- Publication number
- CN105551776A CN105551776A CN201610053983.4A CN201610053983A CN105551776A CN 105551776 A CN105551776 A CN 105551776A CN 201610053983 A CN201610053983 A CN 201610053983A CN 105551776 A CN105551776 A CN 105551776A
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- China
- Prior art keywords
- high pressure
- winding
- voltage winding
- lead
- outer part
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to a novel resin cast dry-type grounding transformer. The inner and outer parts of a high-voltage winding are respectively winded and cast; a hollow terminal is cast at the lower part of a terminal plate; the lead-out head of the inner part of the high-voltage winding is leaded to the hollow terminal and in corner connection with a lead-out tail end of the outer part of the high-voltage winding; the first end of the inner part of the high-voltage winding is leaded out and welded on a high-voltage lead-out copper bar; the high-voltage lead-out copper bar is fixed through an insulator; the lead-out first head in the outer part of the high-voltage winding is directly sealed together on the terminal plate, such that a neutral point lead wire is leaded out; and a tapping terminal is leaded out on the outer part of the high-voltage winding. Because the lead-out head of the inner part of the high-voltage winding is directly connected onto the terminal plate of the outer part of the high-voltage winding at the outer part, the distance can be completely ensured; the insulation property between the inner part of the high-voltage winding and the nearest electrified body of the outer part of the high-voltage winding is improved; furthermore, only air exists in the space between the inner part and the outer part; a cooling air channel formed by casting does not exist; creepage cannot be generated through an air channel spacing strip in the operation process; the local discharge amount is obviously decreased; and powerful guarantee is provided for safe and reliable operation of users.
Description
Technical field
The present invention relates to the transformer used in a kind of electrical network, particularly relate to a kind of new type resin cast dry-type earth transformer.
Background technology
In recent years, along with the expanding day of power distribution network capacity, the requirement of users to power supply reliability is more and more higher, and the mode of current isolated neutral is more and more not suitable with the demand for development of system.The experience of the mode of neutral by arc extinction coil grounding existing successful operation at home and abroad, for the system of neutral point insulation, then will for its provide one artificial can the neutral point of ground connection so that by it by system neutral ground connection.Along with the development of China's electric utility, more and more higher to the safe operation requirement of electrical network and power equipment, user needs low noise, pollution-free, safety and reliability is high, the grounding transformer of few maintenance type.Current existing dry-type earth transformer high-voltage winding structure is integrated type, due to the Z-shaped wiring that it is special, high voltage winding component becomes inside and outside two parts, integral structure is the cast of inside and outside two parts one, and air channel, centre separates, and inner lead is drawn out on terminal board in exterior loop bottom, apart from bad guarantee, cause decreasing insulating, the bad control of partial discharge quantity, affects the safe and reliable operation of transformer.
Summary of the invention
For the problems referred to above that existing dry-type earth transformer exists, the invention provides a kind of insulation property high, partial discharge quantity is little, new type resin cast dry-type earth transformer safe and reliable to operation.
The taked concrete technical measures that solve the problem are:
A kind of new type resin cast dry-type earth transformer, it is characterized in that: winding 2 coiling and cast respectively in the outer winding 1 of high pressure and high pressure, fixed by silicon rubber bar between winding 2 in the outer winding 1 of high pressure and high pressure, centre air separates, at the bottom of terminal board 7 cast dead end 9, in high pressure the leading-out end 10 of winding 2 directly guide to dead end 9 places and high pressure outward the extraction tail head 12 of winding 1 carry out angle and be connected
,in high pressure, first 5 of winding 2 axial directly extraction is welded on high pressure extraction copper bar 3, high pressure is drawn copper bar 3 and is fixed by insulator 4, extraction first 11 in the outer winding 1 of high pressure is directly enclosed on terminal board 7 draws neutral point lead-in wire 6 together, and tap terminals 8 is drawn on the outer winding 1 of high pressure.
beneficial effect of the present invention: the present invention is due to the structure of two parts employing difference coiling and cast inside and outside high pressure winding, in high pressure, Winding tap is directly connected in outside on the terminal board of the outer winding of high pressure, distance can be ensured completely, improve the insulation property between the outer nearest electrified body of winding of high pressure, and be only air between internal and external parts, do not pour into a mould the cooling air channel of formation, can not produce creepage by air channel parting bead in running, partial discharge quantity obviously declines, and provides sound assurance to the safe and reliable operation of user.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is the vertical view of mesohigh winding of the present invention.
Fig. 5 is the vertical view of conventional high-tension winding.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
A kind of new type resin cast dry-type earth transformer, as shown in Figures 1 to 4, winding 2 coiling and cast respectively in the outer winding 1 of high pressure and high pressure, fixed by silicon rubber bar between winding 2 in the outer winding 1 of high pressure and high pressure, centre air separates, in high pressure, winding 2 is not with tap, head and the tail lift one's head axial lead, the outer winding 1 of high pressure is with tap leading-out end 8, every extraction mutually six tap leading-out ends, the outer winding head and the tail head of high pressure and tap are all drawn on terminal board 7, dead end 9 is additionally poured into a mould in the bottom of terminal board 7, in high pressure the leading-out end 10 of winding 2 directly guide to dead end 9 places and high pressure outward the extraction tail head 12 of winding 1 carry out angle and be connected, facilitate outside and carry out lead-in wire connection, be welded on copper bar 3 after first 5 of winding 2 axial directly extraction in high pressure, drawing copper bar 3 is terminals that transformer is connected with outside line, A in Fig. 1, B, C, 0 is phase sequence identification respectively, draw copper bar 3 to be fixed by the insulator 4 on folder, position with silicon rubber bar between high pressure two outside windings, ensure that enough insulation distances.Extraction first 11 in the outer winding 1 of high pressure is directly enclosed on terminal board 7 draws neutral point lead-in wire 6 together, and tap terminals 8 is drawn on the outer winding 1 of high pressure.
Fig. 4 is the vertical view of mesohigh winding of the present invention, and Fig. 5 is the vertical view of conventional high-tension winding, and 1 in Fig. 4 and Fig. 5 is the outer winding of high pressure, and 2 is windings in high pressure.High pressure winding in the present invention is with the distinguishing characteristics of conventional high-tension winding: two windings in the present invention separate coiling and cast, centre air separates, centre does not have the air channel 13 in conventional high-tension winding, fix with silicon rubber bar between two windings, in high pressure, first 5 of winding 2 axial directly extraction is soldered on high pressure extraction copper bar 3, draw copper bar 3 to be fixed by insulator 4, the extraction first 11 of the outer winding 1 of high pressure is directly enclosed on terminal board 7 draws neutral point lead-in wire 6 together, tap terminals 8 is only drawn on the outer winding 1 of high pressure, dead end 9 places that in high pressure, the leading-out end 10 of winding 2 is directly guided on terminal board 7 are fixed, the extraction tail head 12 of outer winding 1 carries out angle connection with high pressure again.And the high-voltage winding structure in current existing dry-type earth transformer is integrated type, due to the Z-shaped wiring that it is special, high voltage winding component becomes inside and outside two parts, integral structure is the cast of inside and outside two parts one, and air channel, centre 13 separates, and inner lead is drawn out on terminal board in exterior loop bottom, apart from bad guarantee, cause decreasing insulating, the bad control of partial discharge quantity, affects the safe and reliable operation of transformer.
Claims (1)
1. a new type resin cast dry-type earth transformer, it is characterized in that: in the outer winding (1) of high pressure and high pressure, winding (2) distinguishes coiling and cast, fixed by silicon rubber bar between winding (2) in the outer winding (1) of high pressure and high pressure, centre air separates, in the bottom of terminal board (7) cast dead end (9), in high pressure the leading-out end (10) of winding (2) directly guide to dead end (9) place and high pressure outward the extraction tail head (12) of winding (1) carry out angle and be connected
,in high pressure, the first head (5) of winding (2) is axially directly drawn and is welded on high pressure extraction copper bar (3), high pressure is drawn copper bar (3) and is fixed by insulator (4), the first head of extraction (11) in the outer winding (1) of high pressure is directly enclosed on terminal board (7) draws neutral point lead-in wire (6) together, and tap terminals (8) is above drawn at the outer winding (1) of high pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053983.4A CN105551776A (en) | 2016-01-27 | 2016-01-27 | Novel resin cast dry-type grounding transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053983.4A CN105551776A (en) | 2016-01-27 | 2016-01-27 | Novel resin cast dry-type grounding transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105551776A true CN105551776A (en) | 2016-05-04 |
Family
ID=55830904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610053983.4A Pending CN105551776A (en) | 2016-01-27 | 2016-01-27 | Novel resin cast dry-type grounding transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105551776A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19809572A1 (en) * | 1998-03-05 | 1999-10-14 | Siemens Ag | Resin=cast transformer |
| CN201392715Y (en) * | 2009-03-19 | 2010-01-27 | 思源电气股份有限公司 | Three-column type amorphous alloy dry-type grounding transformer |
| CN101651020A (en) * | 2009-08-05 | 2010-02-17 | 济南志亨特种变压器有限公司 | Wire and foil mixedly winding coil grounding transformer |
| CN201812647U (en) * | 2010-08-12 | 2011-04-27 | 潍坊五洲浩特电气有限公司 | Dry type grounding transformer |
| CN202025617U (en) * | 2010-12-10 | 2011-11-02 | 西安天虹电器有限公司 | Dry-type grounding transformer structure poured by epoxy resin |
| CN204407147U (en) * | 2015-03-03 | 2015-06-17 | 邯郸市恒山通用电气有限公司 | A kind of grounding transformer |
| CN205354836U (en) * | 2016-01-27 | 2016-06-29 | 丹东欣泰电气股份有限公司 | Novel resin pouring dry -type grounding transformer |
-
2016
- 2016-01-27 CN CN201610053983.4A patent/CN105551776A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19809572A1 (en) * | 1998-03-05 | 1999-10-14 | Siemens Ag | Resin=cast transformer |
| CN201392715Y (en) * | 2009-03-19 | 2010-01-27 | 思源电气股份有限公司 | Three-column type amorphous alloy dry-type grounding transformer |
| CN101651020A (en) * | 2009-08-05 | 2010-02-17 | 济南志亨特种变压器有限公司 | Wire and foil mixedly winding coil grounding transformer |
| CN201812647U (en) * | 2010-08-12 | 2011-04-27 | 潍坊五洲浩特电气有限公司 | Dry type grounding transformer |
| CN202025617U (en) * | 2010-12-10 | 2011-11-02 | 西安天虹电器有限公司 | Dry-type grounding transformer structure poured by epoxy resin |
| CN204407147U (en) * | 2015-03-03 | 2015-06-17 | 邯郸市恒山通用电气有限公司 | A kind of grounding transformer |
| CN205354836U (en) * | 2016-01-27 | 2016-06-29 | 丹东欣泰电气股份有限公司 | Novel resin pouring dry -type grounding transformer |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160504 |