CN107424806B - It can be realized the device and method of high-current low-voltage side twin voltage switching - Google Patents
It can be realized the device and method of high-current low-voltage side twin voltage switching Download PDFInfo
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- CN107424806B CN107424806B CN201710767618.4A CN201710767618A CN107424806B CN 107424806 B CN107424806 B CN 107424806B CN 201710767618 A CN201710767618 A CN 201710767618A CN 107424806 B CN107424806 B CN 107424806B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
-
- 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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The present invention provides the device and methods that can be realized the switching of high-current low-voltage side twin voltage.Described device includes at least one first contact, at least one second contact, at least one third contact and at least one shift piece, the shift piece is connected by the first contact and the connection of the second contact or by the first contact with third contact, first contact connects the first lead drawn from one end of the first low-voltage coil of transformer, first low tension terminal of the second lead connection transformer drawn from the other end of the first low-voltage coil of transformer, second contact connects the third lead drawn from one end of the second low-voltage coil of transformer, the second low tension terminal and third contact for the 4th lead connection transformer drawn from the other end of the second low-voltage coil of transformer.The present invention eliminates original switching switch under the premise of meeting voltage switching, to substantially save the purchase cost of switch, therefore the overall cost of transformer also reduces.
Description
Technical field
The present invention relates to the design field of threephase oil immersed transformer, in particular to realization high-current low-voltage side twin voltage is cut
The device and method changed.
Background technique
With being continuously increased for Domestic Transformers export volume, for some Latin Americas, the countries such as Africa, since power grid operation is asked
Topic, voltage class is intricate, diversification, requires the switching of low-pressure side twin voltage to use transformer majority.The invention discloses
A kind of oil-immersed transformer comprising cabinet and case lid, case lid are equipped with the device that low tension terminal and twin voltage switch, cabinet
It inside sets there are two low-voltage coil, the device and low tension terminal that two low-voltage coils and twin voltage switch can pass through case after connecting
The device switching connection of the voltage switching covered carrys out pressure regulation.
Generally switching is added to open using series coil in the design of transformer stage in the transformer of low-voltage dual-voltage switching
The structure of pass realizes twin voltage handoff functionality.When transformer capacity becomes larger, and low-pressure side electric current is greater than 4000A or more, to switching
The selection of switch there is very big problem, and this high-current switch is generally wanted without the economic section three-phase integrated switch in space-efficient
Single-phase switch is done to meet high current requirement.In the prior art, when low pressure needs double cutting to change, can only select three it is single-phase
Switching switch, to meet the requirement that switch must endure as high current.The shortcomings that this solution is: three high currents are single-phase to be opened
Close at high cost, the transformer-cabinet space of occupancy is big, considerably increases transformer material cost and transformer outer dimension.It is aobvious
So, after by the way of three single-phase switching switches, although performance is met the requirements, the production cost of transformer entirety will substantially
Increase.
Summary of the invention
The object of the present invention is to provide a kind of completely new transformer costs that is effectively reduced to realize high-current low-voltage side twin voltage
The device and method of switching must select three lists when strong current transformer low pressure pair switching in traditional solution to overcome
It mutually switchs, the shortcomings that being significantly increased so as to cause transformer entirety production cost.
In order to achieve the above object, the present invention provides a kind of dresses that can be realized the switching of high-current low-voltage side twin voltage
It sets, which is characterized in that including at least one first contact, at least one second contact, at least one third contact and at least one
A shift piece, the shift piece are connected by the first contact and the connection of the second contact or by the first contact with third contact, and first
Contact connects the first lead drawn from one end of the first low-voltage coil of transformer, from the another of the first low-voltage coil of transformer
First low tension terminal of the second lead connection transformer that one end is drawn, the second contact connect the second low-voltage line from transformer
The third lead that one end of circle is drawn, the 4th lead drawn from the other end of the second low-voltage coil of transformer connect transformer
The second low tension terminal and third contact.
Preferably, the first lead connects the first contact by copper bus-bar, and third lead connects the by copper bus-bar
Two contacts, the 4th lead connect third contact by copper bus-bar, and first contact, the second contact and third contact are all copper
Screw rod.
It is highly preferred that being connected between the copper screw bolt and copper bus-bar by copper nut.
The present invention also provides a kind of oil with the above-mentioned device that can be realized the switching of high-current low-voltage side twin voltage
Immersion transformer, including fuel tank and case lid, the fuel tank is interior to be equipped with the first low-voltage coil and the second low-voltage coil, feature
It is, further includes the above-mentioned device that can be realized the switching of high-current low-voltage side twin voltage, the case lid is fixedly connected with insulation
Plate, the first contact, the second contact and the third contact of the device that can be realized the switching of high-current low-voltage side twin voltage are solid
Due on the insulation board, shift piece is located above insulation board.
Preferably, the upside of the fuel tank is equipped with oil box, and oil box connects the first valve and the second valve.
It is highly preferred that the oil box is equipped with oil box hand hole.
It is highly preferred that the oil box is equipped with oil box air relief cock.
It is highly preferred that the junction between the oil box and case lid is equipped with gasket.
The present invention also provides a kind of methods that can be realized the switching of high-current low-voltage side twin voltage, which is characterized in that adopts
With the above-mentioned device that can be realized the switching of high-current low-voltage side twin voltage, touched by operation shift piece in the first contact and second
It is switched between head connection and the first contact and the connection of third contact, changes the first low tension terminal of transformer and the second low pressure
Output voltage between binding post realizes the switching of high-current low-voltage side twin voltage.
Compared with prior art, the beneficial effects of the present invention are:
The device that can be realized the switching of high-current low-voltage side twin voltage of the invention exists two low-voltage coil copper bus-bars
Inside transformer is connected as twin voltage switch mode, cancels switching switch, to meet the switching of strong current transformer low-voltage dual-voltage
Requirement.
After transformer of the invention is by increasing the device that one can be realized the switching of high-current low-voltage side twin voltage, full
Under the premise of afc voltage switches, eliminate original switching switch, to substantially save the purchase cost of switch, transformer it is whole
Therefore body cost also reduces.
Detailed description of the invention
Fig. 1 is the schematic device that can be realized the switching of high-current low-voltage side twin voltage；
Fig. 2 is oil-immersed transformer schematic diagram；
Fig. 3 is oil-immersed transformer top view.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
As shown in Figure 1, the device that can be realized the switching of high-current low-voltage side twin voltage of the present embodiment, including the first contact
1, the second contact 2, third contact 3 and shift piece 1-8, the shift piece 1-8 by the first contact 1 and the second contact 2 connection or
First contact 1 and third contact 3 are connected, the first contact 1 connects the drawn from one end of the first low-voltage coil of transformer
The first low pressure of one lead a1, the second lead x1 connection transformer drawn from the other end of the first low-voltage coil of transformer connect
Terminal X0, the second contact 2 connect the third lead x2 drawn from one end of the second low-voltage coil of transformer, from the of transformer
The the second low tension terminal X1 and third contact 3 for the 4th lead a2 connection transformer that the other end of two low-voltage coils is drawn.
As shown in Figures 2 and 3, a kind of oil with the above-mentioned device that can be realized the switching of high-current low-voltage side twin voltage
Immersion transformer, including fuel tank and case lid 1-3, the fuel tank are interior low equipped with high-tension coil, the first low-voltage coil and second
Crimping circle, further includes the above-mentioned device that can be realized the switching of high-current low-voltage side twin voltage, and the case lid 1-3 is fixedly connected
Insulation board 1-5, the insulation board 1-5 are epoxy plate, the device that can be realized the switching of high-current low-voltage side twin voltage
The first contact 1, the second contact 2 and third contact 3 be fixed on insulation board 1-5, shift piece 1-8 be located on insulation board 1-5
Side, the first lead a1 pass through copper bus-bar 1-1 connection second by the first contact of copper bus-bar 1-1 connection 1, third lead x2
Contact 2, the 4th lead a2 pass through copper bus-bar 1-1 connection third contact 3, first contact 1, the second contact 2 and third touching
First 3 be all copper screw bolt 7.It is connected between the copper screw bolt 7 and copper bus-bar 1-1 by copper nut 1-2 and gasket.First low pressure connects
Terminal X0 and the second low tension terminal X1 can be set on case lid 1-3 or insulation board 1-5.
In the present embodiment, the first contact 1, the second contact 2, third contact 3, shift piece 1-8, the second low tension terminal X1,
First low-voltage coil, the second low-voltage coil respectively have 3, and the first low tension terminal X0 has 1, connect as shown in Figure 1, this is first low
Crimping terminal X0 and 1 the first contact 1,1 shift of third contact 3,1 of the second contact 2,1 piece 1-8,1 the second low pressure connect
Terminal X1,1 the first low-voltage coil, 1 the second low-voltage coil constitute a set of voltage changeover module, entirely can be realized high current
The device of low-pressure side twin voltage switching is made of 3 sets of voltage changeover modules.
The upside of the fuel tank is equipped with oil box 1-12, oil box 1-12 connection the first valve 1-11 and the second valve 1-6.Institute
The oil box 1-12 stated is equipped with oil box hand hole 1-9.The oil box 1-12 is equipped with oil box air relief cock 1-10.The oil box 1-
Junction between 12 and case lid 1-3 is equipped with gasket 1-4.
When installation, in the device point that can be realized the switching of high-current low-voltage side twin voltage, outer two parts；It presses inside
First lead a1, third lead x2, the 4th lead a2 are fastened on copper screw bolt 7 by Fig. 1 by copper bus-bar 1-1, by second
First low tension terminal X0, the second low tension terminal X1 of the 4th lead a2 connection transformer of lead x1 connection transformer is used
Copper nut 1-2, gasket fastening are secured.Gear shift piece 1-8 is fixed on suitable copper screw bolt 7 and is tightened by outside by voltage output requirement
It reinforces.Wherein copper bus-bar 1-1, copper nut 1-2, copper backing, 7 specification of copper screw bolt are selected by actual current size.Assembly
Oil box 1-12 oil filler test together with ontology after the completion, commissioning test.
The method switched using the high-current low-voltage side twin voltage of above-mentioned apparatus are as follows: by operation shift piece 1-8 first
It is switched between contact 1 and the connection of the second contact 2 and the first contact 1 and the connection of third contact 3, when the first contact 1 and second
When contact 2 connects, the first low-voltage coil and the series connection of the second low-voltage coil, transformer the first low tension terminal X0 and the second low pressure are connect
A kind of voltage is exported between terminal X1, when the first contact 1 and third contact 3 connect, transformer the first low tension terminal X0 and
Another voltage is exported between second low tension terminal X1, to change transformer the first low tension terminal X0 and the second low pressure connects
Output voltage between terminal X1 realizes the switching of high-current low-voltage side twin voltage.
When user scene needs low pressure switching voltage operation, transformer power-off closes the first valve 1-11, opens second
Transformer oil surface in oil box is put into position under gear shift piece 1-8, opens oil box hand hole 1-9, gear shift piece 1-8 is switched by valve 1-6
It onto the contact of suitable voltage gear, is secured with nuts, closes oil box hand hole 1-9, close the second valve 1-6, open oil box
Air relief cock 1-10 opens the first valve 1-11, allows the oil note inside conservator to arrive oil box 1-12, when oil box air relief cock 1-10 has oil to emit
Oil box air relief cock 1-10 is closed when out, observes oil pillow oil level, and repairing when repairing is needed to switch to suitable oil level, completion primary voltage
Overall process.
Claims (6)
1. a kind of oil-immersed transformer with the device that can be realized the switching of high-current low-voltage side twin voltage, described can be real
The device of existing high-current low-voltage side twin voltage switching, which is characterized in that including at least one first contact (1), at least one the
Two contacts (2), at least one third contact (3) and at least one shift piece (1-8), the shift piece (1-8) are touched first
Head (1) and the second contact (2) connection connect the first contact (1) and third contact (3), and the first contact (1) is connected from transformation
The first lead (a1) that one end of first low-voltage coil of device is drawn is drawn from the other end of the first low-voltage coil of transformer
Second lead (x1) connects the first low tension terminal (X0) of transformer, and the second contact (2) connects the second low pressure from transformer
The third lead (x2) that one end of coil is drawn, the 4th lead (a2) drawn from the other end of the second low-voltage coil of transformer
The second low tension terminal (X1) and third contact (3) of transformer are connected, the oil-immersed transformer includes fuel tank and case
It covers (1-3), further includes the device that can be realized the switching of high-current low-voltage side twin voltage, be equipped with first in the fuel tank
Low-voltage coil and the second low-voltage coil, the case lid (1-3) are fixedly connected insulation board (1-5), and insulation board (1-5) passes through sealing
The hollow position in case lid (1-3) is arranged in pad (1-4), the device that can be realized the switching of high-current low-voltage side twin voltage
First contact (1), the second contact (2) and third contact (3) are fixed on the insulation board (1-5), and shift piece (1-8) is located at insulation
Above plate (1-5), the first lead connects the first contact by copper bus-bar, and third lead passes through the second touching of copper bus-bar connection
Head, the 4th lead connect third contact by copper bus-bar, and first contact, the second contact and third contact are all copper screw bolt
(7)。
2. the oil immersed type transformation as described in claim 1 with the device that can be realized the switching of high-current low-voltage side twin voltage
Device, which is characterized in that the upside of the fuel tank is equipped with oil box (1-12), and oil box (1-12) connects the first valve (1-11) and the
Two valves (1-6), oil box (1-12) hermetically tip upside down on case lid (1-3).
3. the oil immersed type transformation as claimed in claim 2 with the device that can be realized the switching of high-current low-voltage side twin voltage
Device, which is characterized in that the oil box (1-12) is equipped with oil box hand hole (1-9).
4. the oil immersed type transformation as claimed in claim 2 with the device that can be realized the switching of high-current low-voltage side twin voltage
Device, which is characterized in that the oil box (1-12) is equipped with oil box air relief cock (1-10).
5. the oil immersed type transformation as claimed in claim 2 with the device that can be realized the switching of high-current low-voltage side twin voltage
Device, which is characterized in that the junction between the oil box (1-12) and case lid (1-3) is equipped with gasket (1-4).
6. the oil immersed type transformation as described in claim 1 with the device that can be realized the switching of high-current low-voltage side twin voltage
Device, which is characterized in that connect between the copper screw bolt (7) and copper bus-bar (1-1) by copper nut (1-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710767618.4A CN107424806B (en) | 2017-08-30 | 2017-08-30 | It can be realized the device and method of high-current low-voltage side twin voltage switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710767618.4A CN107424806B (en) | 2017-08-30 | 2017-08-30 | It can be realized the device and method of high-current low-voltage side twin voltage switching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107424806A CN107424806A (en) | 2017-12-01 |
| CN107424806B true CN107424806B (en) | 2019-07-16 |
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| CN201710767618.4A Active CN107424806B (en) | 2017-08-30 | 2017-08-30 | It can be realized the device and method of high-current low-voltage side twin voltage switching |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109741979B (en) * | 2018-12-27 | 2024-05-03 | 西门子能源变压器(武汉)有限公司 | Switching device of transformer and transformer |
| CN111816428A (en) * | 2020-06-19 | 2020-10-23 | 山东电力设备有限公司 | 220KV three-winding medium-voltage dual-voltage transformer lead structure |
| CN114156070A (en) * | 2021-12-30 | 2022-03-08 | 济南清河电气有限公司 | Oil-immersed transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201117415Y (en) * | 2007-11-12 | 2008-09-17 | 郑龙 | Self-coupled regulating transformer winding construction |
| CN202134380U (en) * | 2011-07-11 | 2012-02-01 | 申达电气集团有限公司 | Double-voltage dry type transformer |
| CN102420046A (en) * | 2011-11-02 | 2012-04-18 | 杭州钱江电气集团股份有限公司 | Double-voltage transformer |
| CN105742032A (en) * | 2014-12-09 | 2016-07-06 | 特变电工沈阳变压器集团有限公司 | Double-voltage coil for photovoltaic transformer and winding method of double-voltage coil |
-
2017
- 2017-08-30 CN CN201710767618.4A patent/CN107424806B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201117415Y (en) * | 2007-11-12 | 2008-09-17 | 郑龙 | Self-coupled regulating transformer winding construction |
| CN202134380U (en) * | 2011-07-11 | 2012-02-01 | 申达电气集团有限公司 | Double-voltage dry type transformer |
| CN102420046A (en) * | 2011-11-02 | 2012-04-18 | 杭州钱江电气集团股份有限公司 | Double-voltage transformer |
| CN105742032A (en) * | 2014-12-09 | 2016-07-06 | 特变电工沈阳变压器集团有限公司 | Double-voltage coil for photovoltaic transformer and winding method of double-voltage coil |
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| CN107424806A (en) | 2017-12-01 |
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