CN201294148Y - Low-voltage down-lead structure for mining explosion-proof dry transformer - Google Patents
Low-voltage down-lead structure for mining explosion-proof dry transformer Download PDFInfo
- Publication number
- CN201294148Y CN201294148Y CNU2008201617206U CN200820161720U CN201294148Y CN 201294148 Y CN201294148 Y CN 201294148Y CN U2008201617206 U CNU2008201617206 U CN U2008201617206U CN 200820161720 U CN200820161720 U CN 200820161720U CN 201294148 Y CN201294148 Y CN 201294148Y
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- low
- voltage
- lead
- head end
- transformer
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Abstract
The utility model provides a low-voltage lead structure of a mine flame-proof type dry type transformer, which comprises a low-voltage coil, a low-voltage terminal plate and a wall-threading casing guide rod, wherein the head end and the tail end of the low-voltage coil are respectively connected on the low-voltage terminal plate through a head end lead and a tail end lead for conducting the planet/triangle transformation, the head end of the low-voltage is further connected on the wall-threading casing guide rod through the head end lead for supplying electrical energy for loads, the head end and the tail end of the low-voltage coil are both located on the upper portion of the low voltage side of the transformer, and the low-voltage terminal plate is installed on the middle upper portion of the low-voltage side of the transformer. The low-voltage lead structure has simple and reasonable structure, short lead and small difference in the lengths of three-phase leads, can save copper material, reduces cost and lead waste, assures the direct current resistance balance ratio of a low-voltage winding, and is convenient for the operation of users as the low-voltage terminal plate is arranged on the middle upper portion of the low-voltage side of the transformer.
Description
Technical field
The utility model relates to the low-voltage lead structure of a kind of transformer, particularly a kind of flameproof dry type transformer.
Background technology
Regulation among the GB8286-2005 " flameproof mining mobile transformer substation ", capacity is that the product low pressure output voltage 693V/400V of 50-250kVA is convertible, capacity is that the product low pressure output voltage 1200V/693V of 315-1000kVA is convertible, and the joint group label is Yy0 (d11).That is to say that low pressure winding coupling group can be carried out the star/delta conversion, be convenient to the user adjusts transformer according to the equipment situation output voltage.Also stipulate winding direct current unbalance factor in the standard: the phase resistance unbalance factor is 4%, and the line resistance unbalance factor is 2%; Should survey maximum with three-phase subtracts minimum value and makes molecule three-phase actual measurement mean value and make denominator and calculate.At present, the low-voltage lead structure of existing flameproof dry type transformer, the head end of its low-voltage coil and tail end lay respectively at the top and the bottom of the low-pressure side of transformer, lead to the low-pressure end of transformer respectively as head end lead-in wire and tail end with copper busbar; Low-voltage coil head end lead-in wire divides two-way again, guides under the road direction on the low pressure terminal block, to carry out the star/delta conversion; Another pass is to the wall bushing guide rod, to power to the load; Low-voltage coil tail end lead-in wire upwards is connected on the low pressure terminal block.Thereby, the following shortcoming that existing low pressure wiring construction exists: the one, lead-out wire is long, causes cost height, lead-in wire loss big; The 2nd, three-phase wire length difference is big, and it is many to beat contact, and the winding D.C. resistance unbalance factor exceeds standard; The 3rd, because the low pressure terminal block is positioned at transformer right-hand member bottom, user's operation is very inconvenient.
The utility model content
For overcoming the deficiencies in the prior art part, the utility model provides a kind of low-voltage lead structure of rational in infrastructure, cost is low, loss is little, the D.C. resistance unbalance factor is qualified and easy to operate flameproof dry type transformer.
The technical scheme that its technical problem that solves the utility model adopts is: it comprises low-voltage coil, low pressure terminal block and wall bushing guide rod; Low-voltage coil head end and low-voltage coil tail end are received on the low pressure terminal block carrying out the star/delta conversion by head end lead-in wire and tail end lead-in wire respectively, and the low-voltage coil head end also goes between by head end and receives on the wall bushing guide rod to power to the load; It is characterized in that: above-mentioned low-voltage coil head end and tail end all are positioned at the transformer low voltage upper lateral part, and the low pressure terminal block is loaded on the middle top of step down side.
The beneficial effects of the utility model are: it is simple and reasonable for structure, lead-out wire is short, three-phase wire length difference is little, can save copper material, reduce cost and go between loss, guarantee low pressure winding D.C. resistance balanced ratio, and because the low pressure terminal block is positioned at the step down side middle and upper part, the user is easy to operate.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the right view of Fig. 1.
Among the figure: 1 be the low-voltage coil head end, 2 for the low-voltage coil tail end, 3 for head end lead-in wire, 4 for tail end lead-in wire, 5 low pressure terminal blocks, 6 be the wall bushing guide rod.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model comprises low-voltage coil, low pressure terminal block 5 and wall bushing guide rod 6; Low-voltage coil head end 1 and tail end 2 all are positioned at the transformer low voltage upper lateral part, and low pressure terminal block 5 is loaded on the top in the middle of the step down side, and wall bushing guide rod 6 is loaded on the middle upper portion of step-down side.Three low-voltage coil head ends 1 are received respectively by head end lead-in wire 3 on a, b, the c binding post of low pressure terminal block 5, and three low-voltage coil tail ends 2 are received on x, y, the z binding post of low pressure terminal block 5 respectively by tail head end lead-in wire 4; If in the time of need carrying out the star conversion, then adopt brace that x, y, z binding post are linked to each other; If in the time of need carrying out the triangle conversion, then adopt brace respectively a to be linked to each other respectively with the x binding post with z, c with y, b.And a of low pressure terminal block, b, c binding post also link to each other with a that is loaded on wall bushing guide rod 6, b, c binding post respectively, so that power to the load.The utility model is owing to all be arranged at low-voltage coil head end 1 and tail end 2 top of step down side, and low pressure terminal block 5 is loaded on the middle and upper part of step down side, thereby make lead-out wire short, three-phase wire length difference is little, saved copper material, reduced cost and lead-in wire loss, guarantee low pressure winding D.C. resistance balanced ratio, and the user has been easy to operate.
Claims (1)
1, the low-voltage lead structure of flameproof dry type transformer comprises low-voltage coil, low pressure terminal block and wall bushing guide rod; Low-voltage coil head end and low-voltage coil tail end are received on the low pressure terminal block by head end lead-in wire and tail end lead-in wire respectively, and the low-voltage coil head end is also received on the wall bushing guide rod by the head end lead-in wire; It is characterized in that: above-mentioned low-voltage coil head end and tail end all are positioned at the transformer low voltage upper lateral part, and the low pressure terminal block is loaded on the middle top of step down side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201617206U CN201294148Y (en) | 2008-10-07 | 2008-10-07 | Low-voltage down-lead structure for mining explosion-proof dry transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201617206U CN201294148Y (en) | 2008-10-07 | 2008-10-07 | Low-voltage down-lead structure for mining explosion-proof dry transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201294148Y true CN201294148Y (en) | 2009-08-19 |
Family
ID=41007631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201617206U Expired - Fee Related CN201294148Y (en) | 2008-10-07 | 2008-10-07 | Low-voltage down-lead structure for mining explosion-proof dry transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201294148Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158295A (en) * | 2016-08-30 | 2016-11-23 | 中电电气(江苏)股份有限公司 | Transformer lead structure |
-
2008
- 2008-10-07 CN CNU2008201617206U patent/CN201294148Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158295A (en) * | 2016-08-30 | 2016-11-23 | 中电电气(江苏)股份有限公司 | Transformer lead structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20091109 |