CN201522920U

CN201522920U - Multi input voltage transformer

Info

Publication number: CN201522920U
Application number: CN2009202180060U
Authority: CN
Inventors: 汪峰; 曹玲燕; 王刚; 任祖新
Original assignee: Hangzhou Qiantang River Electric Group Co Ltd
Current assignee: HANGZHOU QRE SPECIAL TRANSFORMER CO., LTD.
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2010-07-07
Anticipated expiration: 2019-09-29

Abstract

The utility model discloses a multi input voltage transformer which comprises a high-voltage coil; each phase of the high-voltage coil comprises a plurality of windings, wherein each winding comprises a plurality of sub-windings; each sub-winding is provided with a plurality of taps; each winding of each phase is formed by connecting the taps of the different sub-windings by connecting pieces; and the connecting pieces of each winding of the same phase are connected by insulators. Compared with the connecting pieces of the transformer of the prior art, the two connecting pieces of the multi input voltage transformer can be simultaneously adjusted to the corresponding positions, thus avoiding that the circulating current which is produced by the transformer due to the adjustment of one connecting piece affects the normal operation of the transformer.

Description

The transformer of many input voltages

Technical field

The utility model relates to a kind of transformer, the distribution transformer of the many input voltages of especially a kind of dry type.

Background technology

In the prior art, a kind of structure of dry-type transformer is shown in Figure 1A-3, the high-tension coil 4 and the low-voltage coil 10 of this transformer are enclosed within on the core limb 11, and high-tension coil 4, low-voltage coil 10 are fixed by upper and

lower cushion block

3,6, and lower cushion block 6 is fixed on the lower clamping piece 7 of core limb 11.Last cushion block 3 is fixedly clamped by the pressure oncomelania bolt on the upper clamping piece 2.Upper and

lower folder

2,7 connects together by arm-tie, makes whole transformer become as a whole.

Wherein, on high-tension side each comprise two windings in mutually, when the connection of these two windings not simultaneously, input voltage is respectively different, for example, and when when being connected in parallel, shown in Fig. 7 A, input voltage is 10kV, when when being connected in series, shown in Fig. 8 A, input voltage is 20kV, and no matter how many on high-tension side input voltages is, the output voltage of low-pressure side all is 400V, shown in Fig. 7 B, 8B.

According to the variation ratio of transformer, K=N1/N2, wherein, K is a conversion ratio, and N1 is the input side umber of turn, and N2 is the output side winding number of turn, if keep outlet side voltage constant, when high side voltage has fluctuation, can recently guarantee the constant of outlet side voltage by adjusting conversion.

Figure 1A, 1B have used this principle just, in order to regulate conversion ratio, include a plurality of taps in two windings of on high-tension side each phase, regulate on high-tension side umber of turn by the connection of adjusting different taps, reach the purpose of adjusting input voltage.When specific implementation, connect the different tap in high-pressure side by a connector usually, for example, as shown in Figure 4, when connector connects

tap

1 and 2, when being input as 10kV, high side voltage is 10500V, and when being input as 20kV, high side voltage is 21000kV; When connector connects 2 and 3, be respectively 10250kV and 20500kV ... when connector connects 5 and 6, be respectively 9500kV and 19000kV.

According to the structure among Figure 1A, the 1B, when low voltage voltage is higher or on the low side, can regulate high side voltage by the connector (also can be called shifting switch) that changes on the high-tension coil.But, when changing the position of connector, must regulate the position of each two connector going up mutually simultaneously.But for the structure among Figure 1A, the 2A, normal because the user ignores or forgets, only regulate one of them, thereby caused serious consequence.The example that is connected to winding shown in Fig. 6 A-6C, at this moment, the high pressure input voltage is 10kV, the brace of AX phase connects

tap

2 and 5, and the brace of A ' X ' phase connects

tap

1 and 6, two braces are not on correspondence position, this moment, there was High Pressure Difference in the high-pressure side, be that 10% voltage difference appears in upper/lower terminal voltage, i.e. 1000V, this voltage difference is again divided by the impedance voltage value Uk of transformer, Uk is generally 6%, to the circulation of the rated current of 1.67 times of 10/6 ≈ occur, thereby influence the normal operation of transformer, will burn transformer when serious.

The utility model content

The technical problems to be solved in the utility model is, at above-mentioned the deficiencies in the prior art, provides a kind of transformer, and especially a kind of transformer of many input voltages is in order to avoid the asynchronous harm that causes of adjustment owing to connector.

For solving the problems of the technologies described above, the utility model provides the connector in a kind of transformer of many input voltages.The transformer of these many input voltages, comprise high-tension coil, each of described high-tension coil comprises a plurality of windings mutually, each winding comprises a plurality of sub-windings, each sub-winding is provided with a plurality of taps, each winding of each phase links to each other the tap of the sub-winding of difference by connector and forms, and connects by insulating part between the connector of each winding of same phase.The winding of each phase of high-tension coil is two, and the sub-winding in each winding is two, and each sub-winding is provided with three taps, and when these two windings were connected in parallel, the high-pressure side input voltage was 10KV.When these two windings in series connected, the high-pressure side input voltage was 20KV.

By screw thread, rivet, adhesive, bolt or be welded together, this insulating part is two, is connected to the opposite ends of different connectors between the connector of high-tension coil and the insulating part.

The utility model also provides alternative attachment, and by screw thread, rivet, adhesive, bolt or be welded together, this insulating part is one, is connected the centre position of different connectors between this connector and the insulating part.

The utlity model has following beneficial effect: but the utility model with respect to two connectors of transformer connector adjusted in concert of prior art to opposite position, avoid causing transformer to produce circulation, influence the normal operation of voltage device because of regulating a connector.

Description of drawings

Figure 1A is the transformer device structure figure of 10kV for the prior art high side voltage;

Figure 1B is the end view of Figure 1A;

Fig. 2 A is the transformer device structure figure of 20kV for the prior art high side voltage;

Fig. 2 B is the end view of Fig. 2 A

Fig. 3 is the cutaway view of prior art transformer;

Fig. 4 be terminal with transformer high-voltage side voltage be connected corresponding relation figure;

Fig. 5 A is the transformer device structure figure of 10kV for the utility model high side voltage;

Fig. 5 B is the end view of Fig. 5 A;

Fig. 6 A is the winding connection diagram of the connector in two windings of same phase high pressure winding in the transformer of prior art when not having corresponding the adjustment;

Fig. 6 B is a connector connection diagram in two windings of same phase high pressure winding in the transformer of prior art;

Fig. 7 A is that high side voltage is the high-pressure side winding connection diagram of 10kV;

Fig. 7 B is the low-pressure side winding schematic diagram of transformer shown in Fig. 7 A;

Fig. 8 A is the winding connection diagram of 20kV for the utility model high side voltage;

Fig. 8 B is the low-pressure side winding schematic diagram of transformer shown in Fig. 8 A;

Fig. 9 A-9B is the connector structure chart of embodiment 1;

Figure 10 A-10B is the connector structure chart of embodiment 2.

Embodiment

As Fig. 5 A-5B, structural representation for the utility model one specific embodiment, the utility model provides a kind of transformer, high-tension coil 4 is enclosed within on the core limb 11 with low-voltage coil 10, high-tension coil 4, low-voltage coil 10 are fixed by upper and

lower cushion block

3,6, and lower cushion block 6 is fixed on the lower clamping piece 7 of core limb 11.Last cushion block 3 adds by the pressure oncomelania bolt on the upper clamping piece 2 and fastens.Upper and

lower folder

2,7 connects together by arm-tie, makes whole transformer become as a whole.

Its input side can be imported the voltage of plurality of specifications, and as present embodiment, input side can be imported 10KV and 20KV.As Fig. 7 A-Fig. 8 B is the winding connection diagram that high side voltage is respectively 10kV and 20kV, and A wherein, A ', B, B ', C, C ' are the lead riser and the corresponding joints of winding up and down, X, X ', Y, Y ', Z, Z ' be about winding leads tail end and corresponding joints.The relation of utilizing the voltage ratio and the number of turn to be directly proportional, as connection A, A ', X, during X ', winding a is parallel running; Connect B, B ', Y, during Y ', winding b is parallel running; Connect C, C ', Z, during Z ', winding c is parallel running, this moment, high side voltage was 10kV.When connecting X, during A ', winding a is series operation; Connect Y, during B ', winding b is series operation; Connect Z, during C ', winding c is series operation, and this moment, high side voltage was 20kV.

When low-pressure side voltage is on the low side or higher,, make low pressure stable by regulating two connectors on the high-tension coil.As shown in Figure 4, low voltage voltage just often, connector connects 3,4 terminals, high side voltage is 10kV or 20kV; When low voltage voltage was on the low side, connector connected 4,5 terminals or 5,6 terminals, and the high-tension coil number of turn is reduced, and circle voltage improves, and promotes low voltage voltage, makes it reach outputting standard; When low voltage voltage was higher, connector connected 1,2 terminal or 2,3 terminals, and the high-tension coil number of turn is increased, and circle voltage reduces, and reduces low voltage voltage, makes it reach outputting standard.

Shown in Fig. 9 A, be the connector structure chart of embodiment one, wherein A, C are brace, B, D are insulating trip.Brace A goes up punching two ends and aims at the hole stack on insulating trip B, the D respectively, and uses bolt.Brace C goes up punching two ends and aims at the hole stack on insulating trip B, the D respectively, and uses bolt, as Fig. 9 B.Connector is installed in structure on the transformer shown in Fig. 5 A.Because brace A, C on each phase winding in two windings connect into parts by insulating trip B, D, therefore, as long as move one of them brace, then corresponding with it another sheet also will move simultaneously, reaches the purpose that brace is adjusted synchronously with this structure.

Shown in Figure 10 A, be the connector structure chart of embodiment two.Wherein E, G are brace, and F is an insulating trip.Punching was aimed at the hole stack on the insulating trip F respectively in the middle of brace E, G were last, and used bolt, and the opposite side of nut adds securing member, makes it more firm, as Figure 10 B.

In embodiment two, brace E, G and insulating trip F bolt, can not be used in the nut opposite side increases securing member, and it is fixed.In embodiment one, when brace A, C and insulating trip B, D use bolt, also can increase a securing member in the nut outside.

Connector in the foregoing description is a sheet, can certainly be strip, is intercell connector, and the insulating part that is connected with intercell connector can be sheet, also can be round bar shape.When insulating part was sheet, its connected mode was same as the previously described embodiments, and when insulating part was round bar shape, two insulating bar two ends were threaded.Insulating bar and intercell connector are fixing by being threaded.

Have again, between above-mentioned connector and insulating part, be connected also and can pass through connections such as rivet, adhesive, welding.

In above embodiment, the input side of transformer is respectively two kinds of 10kV or 20kV, the also voltage of other specification certainly, also three kinds or more kinds of, accordingly, the number of windings of each phase can be a plurality of more than, can decide by concrete actual conditions.

Claims

1. the transformer of input voltage more than a kind, comprise high-tension coil, each of described high-tension coil comprises a plurality of windings mutually, each winding comprises a plurality of sub-windings, each sub-winding is provided with a plurality of taps, each winding of each phase links to each other the tap of the sub-winding of difference by connector and forms, and it is characterized in that, connects by insulating part between the connector of each winding of described same phase.

2. transformer as claimed in claim 1 is characterized in that, between connector and the insulating part by screw thread, rivet, adhesive, bolt or be welded together.

3. transformer as claimed in claim 2 is characterized in that, when adopting bolt to connect, the free end of bolt passes connector and insulating part, and by fixed by nut, arranged outside one securing member of nut makes its connection more firm at free end.

4. as the transformer of claim 1 or 2 or 3 described many input voltages, it is characterized in that described insulating part is two, be connected to the opposite ends of different connectors.

5. as the transformer of claim 1 or 2 or 3 described many input voltages, it is characterized in that described insulating part is one, be connected the centre position of different connectors.

6. as the transformer of claim 1 or 2 or 3 described many input voltages, it is characterized in that the winding of each phase of described high-tension coil is two, when these two windings were connected in parallel, the high-pressure side input voltage was 10KV; When these two windings in series connected, the high-pressure side input voltage was 20KV.

7. the transformer of many input voltages as claimed in claim 6 is characterized in that, the sub-winding in described each winding is two, and each sub-winding is provided with three taps.