CN201449879U - gas-insulated voltage transformer - Google Patents
gas-insulated voltage transformer Download PDFInfo
- Publication number
- CN201449879U CN201449879U CN2009200092027U CN200920009202U CN201449879U CN 201449879 U CN201449879 U CN 201449879U CN 2009200092027 U CN2009200092027 U CN 2009200092027U CN 200920009202 U CN200920009202 U CN 200920009202U CN 201449879 U CN201449879 U CN 201449879U
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- China
- Prior art keywords
- potential fixed
- current potential
- fixed head
- secondary coil
- ground
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model provides a gas-insulated voltage transformer, comprising an iron core (1), a secondary coil (2) and a primary coil (4), an electric potential fixed plate (8) and a ground electronic plate (6), wherein the secondary coil (2) and the primary coil (4) are wound on the iron core (1); the electric potential fixed plate (8) is arranged between the secondary coil and the primary coil, is connected at the starting position of winding of the primary coil (4) and is connected with a terminal (11) for grounding by a lead (10); the ground electronic plate (6) is arranged between the electric potential fixed plate and the secondary coil and is connected with the iron core (1); in the gas-insulated voltage transformer, the electric potential fixed plate (8) and the ground electronic plate (6) are formed by metal plates made of copper or aluminium and the like, the dimension of the lengthwise direction of the electric potential fixed plate (8) is longer than that of the ground electronic plate (6), and by configuring terminal parts (8a) at the two ends of the lengthwise direction of the electric potential fixed plate (8) on the positions exceeding terminal parts (6a) at the two ends of the lengthwise direction of the ground electronic plate (6), the electric field near the two ends of the electric potential fixed plate is alleviated.
Description
Technical field
The utility model relates to a kind of in power equipment, high pressure is become the gas-insulated voltage transformer of can the horizontal voltage of mensuration using.
Background technology
Fig. 6 represents the structure of existing instrument transformer, and Fig. 5 represents the equivalent electric circuit of this instrument transformer.Among these figure, the 1st, the iron core that the steel plate layered product constitutes, the 2nd, clip the secondary coil (low-voltage coil) that secondary coil frame 3 is reeled in iron core 1 foot, the 4th, on the primary winding frame 5 of secondary coil 2 outsides and secondary coil arranged coaxial, clip battery lead plate 6 and the insulating barrier 7 of insulation film formation and the primary winding (high-tension coil) that current potential fixed head 8 is reeled over the ground.
This instrument transformer body is housed in the canister 9 (with reference to Fig. 5) of gas-insulated switchgear device, and the insulating gas of this gas-insulated switchgear device inclosure SF6 gas etc. also remains on earthing potential.
Fig. 7 is the expanded view of Fig. 6 Z portion, as this figure clear and definite, in the existing instrument transformer, secondary coil 2 and primary winding 4 wireline reels to the current potential fixed head of measuring 8 and over the ground the longitudinally size of battery lead plate 6 be set at equal, current potential the fixed head 8 and terminal part 6a and the 8a at battery lead plate 6 longitudinally two ends are configured in same position respectively over the ground.
In the existing instrument transformer, as shown in Figure 7, equipotential line V is with little radius of curvature bending near current potential fixed head 8 ends.For this reason, the Dian Wei Pour gradient of equipotential line becomes big near the end of current potential fixed head 8, may produce insulation breakdown.
The utility model content
The technical problem that solves
In the gas-insulated instrument transformer, when gas-insulated switchgear device is assembled and is made regular check on etc., can measure the insulation against ground resistance of primary winding 4 by megameter, so it is foregoing, be drawn out of earlier behind container 9 outsides under the state of 10 pairs of containers of lead of low-pressure side, 9 insulation, the earthy terminal 11 that is provided with container 9 outsides is connected.Therefore, lead 10 of low-pressure side becomes quite long, and it is big that its reactance X becomes.For this reason, flow into high frequency voltage from the high-pressure side of primary winding and increase suddenly, then the current potential of reactance X (with reference to Fig. 5) the current potential fixed head 8 by lead 10 rises, and may produce insulation breakdown near current potential fixed head 8.
And then the current potential one of current potential fixed head 8 rises, and by the electrostatic induction between current potential fixed head 8 and the secondary coil 2, might respond to high voltage on secondary coil 2, causes secondary side to produce insulation breakdown.
Technical scheme
The utility model is applicable to a kind of gas-insulated voltage transformer, have: iron core, be wound on the secondary coil on this iron core, the primary winding of coaxial coiling on this secondary coil, be arranged between secondary coil and primary winding, the coiling that is connected in primary winding begins the place, and be connected in the current potential fixed head of earthy terminal by lead, and between current potential fixed head and secondary coil, current potential fixed head state of insulation is provided with, and connect iron core or with the battery lead plate over the ground of the earth point of the idiostatic setting of iron core, the current potential fixed head clip the current potential fixed head and over the ground the static capacity between the battery lead plate connect earth point.
The current potential fixed head and over the ground battery lead plate constitute with metallic plates such as copper or aluminium, primary winding and secondary coil wireline reel are to the size of the longitudinally of the current potential fixed head of measuring, the size of the longitudinally of measuring than equidirectional of battery lead plate over the ground is long, and the two ends of current potential fixed head longitudinally are surpassing the position termination at battery lead plate longitudinally two ends over the ground.
In addition, preferably, slick and sly shape is made in each end of current potential fixed head longitudinally with the two ends turnup of current potential fixed head longitudinally.
Beneficial effect
Near the medium potential curvature of a curve radius current potential fixed head two ends can be become big, relax near the electric field in current potential fixed head end, the insulation endurance that high frequency voltage is increased is suddenly improved.
And then, with end turnup Cheng Yuanzhuan, so on unskirted basis, current potential fixed head two ends, because of current potential fixed head end portion thickness becomes 2 times, can further relax near the electric field in current potential fixed head end, make it improve near the insulation endurance in current potential fixed head end.
Description of drawings
Fig. 1 is half sectional view in length and breadth of the structure of the gas-insulated instrument transformer implemented of expression the utility model.
Fig. 2 is the cross-sectional view of 1/4 part of presentation graphs 1 instrument transformer cross section.
Fig. 3 is the expanded view of the A part of Fig. 1.
Fig. 4 is the expanded view of the A part variation of presentation graphs 1.
Fig. 5 is that expression the utility model is the equivalent circuit diagram of electric formation of the instrument transformer of object.
Fig. 6 is half sectional view in length and breadth of the existing instrument transformer structure of expression.
Fig. 7 is the Z portion expanded view of Fig. 6.
Embodiment
Basic structure is identical with existing instrument transformer.Current potential fixed head 8 and over the ground battery lead plate 6 constitute by metallic plates such as copper or aluminium.As shown in Figure 3, the wireline reel of primary winding 4 and secondary coil 2 is to the size of current potential fixed head 8 longitudinallies of measuring, the size of 6 longitudinallies of measuring than equidirectional of battery lead plate over the ground is long, and the two ends of current potential fixed head 8 longitudinallies are surpassing the position termination at battery lead plate 6 longitudinally two ends over the ground.8a and 6a represent that respectively current potential fixed head 8 reaches the terminal part of battery lead plate 6 over the ground among Fig. 3.
Make the two ends of current potential fixed head 8 surpass the position termination at battery lead plate 6 two ends over the ground, then equipotential line V is crooked biglyyer towards the outside of current potential fixed head 8 after the internal side diameter bending earlier near the terminal part 6a of battery lead plate 6 over the ground, so the radius of curvature change that can make near the equipotential line V current potential fixed head 8 terminal parts greatly.For this reason, can relax near the electric field in current potential fixed head 8 two ends, the insulation endurance that can improve near the high frequency voltage current potential fixed head 8 both ends increases suddenly.
As shown in Figure 4, turnup is carried out at the two ends of current potential fixed head 8 longitudinallies, preferably slick and sly shape is made in each end of current potential fixed head longitudinally.
Claims (2)
1. gas-insulated voltage transformer, have: iron core, be wound on the secondary coil on this iron core, the primary winding of coaxial coiling on this secondary coil, be arranged between secondary coil and primary winding, the coiling that is connected in primary winding begins the place, and be connected in the current potential fixed head of earthy terminal by lead, and between current potential fixed head and secondary coil, current potential fixed head state of insulation is provided with, and connect iron core or with the battery lead plate over the ground of the earth point of the idiostatic setting of iron core, the current potential fixed head clip the current potential fixed head and over the ground the static capacity between the battery lead plate connect ground connection;
It is characterized in that, the current potential fixed head and over the ground battery lead plate constitute with copper or aluminium metal sheet, primary winding and secondary coil wireline reel are to the size of the longitudinally of the current potential fixed head of measuring, the size of the longitudinally of measuring than equidirectional of battery lead plate over the ground is long, and the two ends of current potential fixed head longitudinally are surpassing place, battery lead plate longitudinally two ends termination over the ground.
2. gas-insulated instrument transformer as claimed in claim 1 is characterized in that current potential fixed head two ends longitudinally is rolled, and makes the current potential fixed head become slick and sly in two ends longitudinally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200092027U CN201449879U (en) | 2009-03-13 | 2009-03-13 | gas-insulated voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200092027U CN201449879U (en) | 2009-03-13 | 2009-03-13 | gas-insulated voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201449879U true CN201449879U (en) | 2010-05-05 |
Family
ID=42554601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200092027U Expired - Lifetime CN201449879U (en) | 2009-03-13 | 2009-03-13 | gas-insulated voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201449879U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479606A (en) * | 2010-11-27 | 2012-05-30 | 江苏思源赫兹互感器有限公司 | Dividing type electronic voltage transformer of three-phase capacitor |
| CN102479607A (en) * | 2010-11-27 | 2012-05-30 | 江苏思源赫兹互感器有限公司 | Dividing type electronic voltage transformer of single-phase capacitor |
| CN104422861A (en) * | 2013-08-28 | 2015-03-18 | 日新电机株式会社 | GIS withstand voltage testing method and transformer for gas insulation instrument using the method |
| CN107192906A (en) * | 2017-05-28 | 2017-09-22 | 西南交通大学 | Voltage's distribiuting experimental system in a kind of lower ground of bipolar board test impact |
-
2009
- 2009-03-13 CN CN2009200092027U patent/CN201449879U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479606A (en) * | 2010-11-27 | 2012-05-30 | 江苏思源赫兹互感器有限公司 | Dividing type electronic voltage transformer of three-phase capacitor |
| CN102479607A (en) * | 2010-11-27 | 2012-05-30 | 江苏思源赫兹互感器有限公司 | Dividing type electronic voltage transformer of single-phase capacitor |
| CN104422861A (en) * | 2013-08-28 | 2015-03-18 | 日新电机株式会社 | GIS withstand voltage testing method and transformer for gas insulation instrument using the method |
| CN107192906A (en) * | 2017-05-28 | 2017-09-22 | 西南交通大学 | Voltage's distribiuting experimental system in a kind of lower ground of bipolar board test impact |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NISSIN (WUXI) ELECTROMECHANICAL CO., LTD. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110720 Address after: Kyoto Prefecture, Kyoto, Beijing, Beijing, Tianjin, Tianjin, mu, Ting, 47 times Co-patentee after: Nisshin (Wuxi) electromechanical Co., Ltd. Patentee after: Nissin Electric Co., Ltd. Address before: Kyoto Prefecture, Kyoto, Beijing, Beijing, Tianjin, Tianjin, mu, Ting, 47 times Patentee before: Nissin Electric Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100505 |