CN202601394U - Double voltage transformer - Google Patents
Double voltage transformer Download PDFInfo
- Publication number
- CN202601394U CN202601394U CN 201220228685 CN201220228685U CN202601394U CN 202601394 U CN202601394 U CN 202601394U CN 201220228685 CN201220228685 CN 201220228685 CN 201220228685 U CN201220228685 U CN 201220228685U CN 202601394 U CN202601394 U CN 202601394U
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- windings
- iron core
- voltage transformer
- winding
- switching device
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Abstract
The utility model discloses a double voltage transformer which comprises a three-phase iron core in a core type structure, three primary windings corresponding to the three-phase iron core, three secondary windings corresponding to the three-phase iron core and a wiring switching device. The wiring switching device is used for selecting schemes of mutual connection of the three primary windings, wherein a scheme one includes that tail ends of three primary windings are connected, and three head ends serve as input ends; and a scheme two includes that head ends and tail ends of the three primary windings are connected to form a closed circuit, and three head ends are connected outside to serve as input ends. The double voltage transformer can switch a 10 kilovolt stage and a 20 kilovolt stage through simple wiring switch, accordingly, the transformer can be applied in 10 kilovolt and 20 kilovolt power distribution systems and matches with power grid improvement, and the power grid improvement cost is reduced.
Description
Technical field
The utility model relates to a kind of transformer, particularly a kind of can be at two voltage transformers of 10KV/20KV conversion.
Background technology
Distribution transformer commonly used is to be connected among the electrical network, is used to transmit electric energy and voltage of transformation.Because the portion of energy loss can appear in the transmission course of electric energy in electrical network, and line voltage is low more, energy loss is big more, so improve line voltage, helps improving the efficiency of transmission of electric energy.
At present; Domestic existing electrical network mainly is the 10KV distribution system; And most in the world developed countries mainly adopt the above distribution system of 20KV even 20KV with the area at present; Therefore, in order to improve China's electrical network electric energy transmitting efficient, the distribution system of the 10KV that China is present is converted into the emphasis of current electric network reconstruction to the distribution system of 20KV.But, in the process of 20KV system transition, can exist and have only the 10KV electric power system now, but will change the situation of 20KV electric power system in the near future in the 10KV system because the existing distribution system of China is very huge.
If dispose transformer of the prior art by routine; The transformer that uses now can only connect the 10KV electrical network to be received; After becoming the 20KV electric power system; After electric power system changed, the user must purchase the transformer that is applicable to the 20KV electric power system again so, and such overlapping investment must cause great waste.
The utility model content
The technical problem that the utility model will solve is in order to overcome in the prior art; The distribution transformer rated primary voltage is a fixed value, thereby can only be applicable to the shortcoming of the electric power system of a magnitude of voltage, and a kind of new type double voltage transformer is provided; Can switch the conversion that just can realize 10KV level, 20KV level through simple wiring; Thereby go for the distribution system of 10KV and 20KV, cooperate electric network reconstruction, practice thrift the electric network reconstruction cost.
The utility model solves above-mentioned technical problem through following technical proposals:
A kind of pair of voltage transformer, it comprises the iron core of a three-phase core formula structure, and three respectively to a winding that should tri-phase iron core, and three respectively to a secondary winding and a wiring switching device shifter that should tri-phase iron core.This wiring switching device shifter is used to select this three interconnective schemes of winding, and scheme one is: the tail end of three windings is connected together, and three head ends are made input respectively; Scheme two is: the two ends of three windings are linked to each other, form a closed-loop path, three head ends pick out as input respectively.
Preferably, these three windings are the high pressure winding, and these three secondary winding are the low pressure winding.
Preferably, these three windings adopt the copper conductor coiling, and these three secondary winding adopt the Copper Foil coiling.This is provided with and can at utmost effectively reduces short-circuit force, thereby improves the anti-sudden short circuit ability of transformer.
In the utility model, but above-mentioned optimum condition combination in any on the basis that meets this area general knowledge promptly gets each preferred embodiment of the utility model.
The positive progressive effect of the utility model is: the utility model provides a kind of novel two voltage transformers; This pair voltage transformer is through being provided with a wiring switching device shifter; Can select the mode of connection of two kinds of windings fast by this wiring switching device shifter, making this pair voltage transformer can be operate as normal under the situation of 10KV and 20KV at primary side voltage, thereby can be applicable to the distribution system of 10KV and 20KV; In electric network reconstruction, need not to buy new transformer separately, practiced thrift cost.
Description of drawings
Fig. 1 is the sketch map of connection plan 1 of two voltage transformers of the utility model one preferred embodiment.
Fig. 2 is the sketch map of connection plan 2 of two voltage transformers of the utility model one preferred embodiment.
Embodiment
The embodiment of the utility model will describe with reference to accompanying drawing.In Figure of description, element or device with similar structures or function will be used the components identical symbolic representation.Accompanying drawing for the ease of each embodiment of explanation the utility model, is not to carry out the explanation of exhaustive to the utility model just, neither limit scope of the present invention.Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to specify the technical scheme of the utility model.
In this embodiment; 1, three of the iron core that two voltage transformers comprise a three-phase core formula structure respectively to 2, three of windings that should tri-phase iron core respectively to a secondary winding 2 and a wiring switching device shifter that should tri-phase iron core; Wherein the connection plan of these three secondary winding 3 is confirmed constant; The two ends that are specially these three secondary winding 3 link to each other, and form a closed-loop path, and these three head ends pick out as output respectively.This wiring switching device shifter is used to select this three winding 2 interconnective schemes, and connection plan one is as shown in Figure 1: tail end X, Y, the Z of these three windings 2 are connected together, and three head end A, B, C make input respectively; Connection plan two is illustrated in figure 2 as: the two ends of these three windings 2 are linked to each other, and promptly the X end links to each other with the B end, and the Y end links to each other with the C end, and the Z end links to each other with the A end, thereby forms a closed-loop path, and wherein three head end A, B, C pick out as input respectively.Selecting the connection plan of these three windings 2 through this wiring switching device shifter is under the situation of scheme 1; The line voltage of input equal two phase differences be 120 degree phase voltage vector with, promptly the line voltage of input be phase voltage
doubly.And the connection plan of these these three windings 2 of wiring switching device shifter selection is under the situation of scheme 2, equals a phase voltage on the line voltage value of input.This pair voltage transformer input terminal voltage when employing connection plan operate as normal in the lump is 20KV, can be applicable to 20KV level electrical network.When through this wiring switching device shifter the connection plan of these three windings 2 being switched to scheme 2, the input rated voltage of this pair voltage transformer becomes 11.5KV
thereby can be applicable to 10KV level electrical network.Those skilled in the art will appreciate that how to make this pair voltage transformer adopt connection plan for the moment the input rated voltage be that 20KV has multiple routine techniques means to realize, as change the coil turn etc. of a winding.
Preferably, these three windings 2 are the high pressure winding, and these three secondary winding 3 are the low pressure winding.Those skilled in the art will appreciate that the relative size that here high pressure and low pressure are meant primary side and secondary side voltage, is not to be the number range of specifying voltage.
Preferably, these three windings 2 adopt the copper conductor coiling, and these three secondary winding 3 adopt the Copper Foil coiling.Being provided with like this can at utmost effectively reduce short-circuit force, thereby improves the anti-sudden short circuit ability of transformer, avoiding causing transformer impaired because of the short-circuit current rush that thunderbolt, protective relaying maloperation etc. cause,
Can find out that from the foregoing description the utility model can adapt to two kinds of distribution systems of 20KV level and 10KV level, avoid after electric network reconstruction, need purchasing different transformers again, thereby reduced cost.
Though more than described the embodiment of the utility model, it will be understood by those of skill in the art that these only illustrate, the protection range of the utility model is limited appended claims.Those skilled in the art can make numerous variations or modification to these execution modes under the prerequisite of principle that does not deviate from the utility model and essence, but these changes and modification all fall into the protection range of the utility model.
Claims (3)
1. two voltage transformer; It is characterized in that it comprises: the iron core of a three-phase core formula structure, three respectively to a winding that should tri-phase iron core; Three respectively to a secondary winding and a wiring switching device shifter that should tri-phase iron core; This wiring switching device shifter is used to select this three interconnective schemes of winding, and scheme one is: the tail end of these three windings is connected together, and three head ends are made input respectively; Scheme two is: the two ends of these three windings are linked to each other, form a closed-loop path, three head ends pick out as input respectively.
2. pair voltage transformer as claimed in claim 1 is characterized in that, these three windings are the high pressure winding, and these three secondary winding are the low pressure winding.
3. pair voltage transformer as claimed in claim 2 is characterized in that, these three windings adopt the copper conductor coiling, and these three secondary winding adopt the Copper Foil coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220228685 CN202601394U (en) | 2012-05-18 | 2012-05-18 | Double voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220228685 CN202601394U (en) | 2012-05-18 | 2012-05-18 | Double voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202601394U true CN202601394U (en) | 2012-12-12 |
Family
ID=47318926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220228685 Expired - Fee Related CN202601394U (en) | 2012-05-18 | 2012-05-18 | Double voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202601394U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108364764A (en) * | 2018-02-08 | 2018-08-03 | 涂发明 | Cross complementary formula high ferro tractive transformer |
-
2012
- 2012-05-18 CN CN 201220228685 patent/CN202601394U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108364764A (en) * | 2018-02-08 | 2018-08-03 | 涂发明 | Cross complementary formula high ferro tractive transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20160518 |