CN202487380U - Structure for combined type transformer fuse protection - Google Patents
Structure for combined type transformer fuse protection Download PDFInfo
- Publication number
- CN202487380U CN202487380U CN2012200748790U CN201220074879U CN202487380U CN 202487380 U CN202487380 U CN 202487380U CN 2012200748790 U CN2012200748790 U CN 2012200748790U CN 201220074879 U CN201220074879 U CN 201220074879U CN 202487380 U CN202487380 U CN 202487380U
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- fuse
- voltage
- phase
- voltage coil
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Abstract
The utility model relates to a structure for combined type transformer fuse protection, which comprises a three-phase high-voltage coil, a three-phase low-voltage coil and three fuse protectors, wherein the three-phase high-voltage coil is in triangular connection, and the three fuse protector are respectively connected with the three-phase high-voltage coil in series. According to the structure for the combined type transformer fuse protection, and the original triangular external connection of the fuse protectors is modified into be in the triangular internal connection. When one fuse protector is fused, the voltage at the corresponding low-pressure side of a fault circuit is zero, and the voltage of the other two phases is normal, so that the undervoltage operation phenomenon of a load can be avoided.
Description
Technical field
The utility model relates to the transformer technology field, especially relates to a kind of structure of combined transformer fuse protection.
Background technology
The characteristics of combined transformer are that transformer body, high voltage load switch, fuse and high-low pressure line are placed in the common closed fuel tank.Transformer adopts Dyn11 to connect as three-phase three-column, three-phase and four-pole and three-phase and five-pole structure usually, and fuse is connected the outside that triangle connects; Three-phase five-limb Dyn11 transformer characteristics are that the strong and anti-thunder characteristic of carrying three-phase imbalance load ability is good; But after fuse one fuses mutually, can cause low-pressure side two phase voltages undesired, be 1/2 of rated voltage; Make load the problem of under-voltage operation occur, bring potential safety hazard to power circuit.
The utility model content
The utility model is intended to overcome the defective of combinations thereof formula transformer fuse protection; A kind of structure of combined transformer fuse protection is provided; After a phase fuse blows of high-tension coil, the low-pressure side voltage of other two phase is normal, and the problem of under-voltage operation can not appear in load.
The technical scheme that technical problem adopted that the utility model solves is:
A kind of structure of combined transformer fuse protection comprises three-phase high-voltage coil, three-phase low-voltage coil and three fuses, and the three-phase high-voltage coil is that triangle connects, and it is characterized in that described three fuses are connected in series with the three-phase high-voltage coil respectively.
The beneficial effect of the utility model is: the fuse protection of the combined transformer of this structure; Fuse was changed in " Δ " the inner method that connects by original " Δ " outside connection; When one of them fuse blows; The low-pressure side voltage that this faulty line is corresponding is zero, and other two phase voltage is normal, avoids occurring the phenomenon of the under-voltage operation of load.
Description of drawings
Below in conjunction with accompanying drawing and embodiment utility model is further specified.
Fig. 1 is the principle schematic of the utility model embodiment.
Among the figure: 1, high-tension coil 2, low-voltage coil 3, fuse.
Embodiment
Among Fig. 1, a kind of structure of combined transformer fuse protection, transformer adopts Dyn11 to connect as the three-phase and five-pole structure, and three-phase five-limb Dyn11 transformer characteristics are that the strong and anti-thunder characteristic of carrying three-phase imbalance load ability is good.This structure comprises three-phase high-voltage coil 1, three-phase low-voltage coil 2 and three fuses 3, and three-phase high-voltage coil 1 connects for triangle, and three fuses 3 are connected in series with three-phase high-voltage coil 1 respectively, and three-phase low-voltage coil 2 is connected with corresponding load respectively.The fuse protection of the combined transformer of this structure; When on power circuit, moving; Fuse 3 was changed in " Δ " the inner method that connects by original " Δ " outside connection, and when one of them fuse 3 fusing, the load voltage of the low-pressure side of the corresponding low-voltage coil 2 of this faulty line is zero; The load voltage of the low-pressure side of other two phases low-voltage coil 2 is normal, avoids occurring the phenomenon of the under-voltage operation of load of the low-pressure side of other two phases low-voltage coil 2.
Claims (1)
1. the structure of a combined transformer fuse protection comprises three-phase high-voltage coil, three-phase low-voltage coil and three fuses, and the three-phase high-voltage coil is that triangle connects, and it is characterized in that described three fuses are connected in series with the three-phase high-voltage coil respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200748790U CN202487380U (en) | 2012-03-02 | 2012-03-02 | Structure for combined type transformer fuse protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200748790U CN202487380U (en) | 2012-03-02 | 2012-03-02 | Structure for combined type transformer fuse protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202487380U true CN202487380U (en) | 2012-10-10 |
Family
ID=46961784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200748790U Expired - Lifetime CN202487380U (en) | 2012-03-02 | 2012-03-02 | Structure for combined type transformer fuse protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202487380U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572535A (en) * | 2015-12-30 | 2016-05-11 | 北京天诚同创电气有限公司 | Monitoring method, monitoring device and monitoring system of step-up transformer |
| CN110794226A (en) * | 2019-10-08 | 2020-02-14 | 云南电力技术有限责任公司 | Method and device for judging fused phase in three-phase three-column type distribution transformer |
-
2012
- 2012-03-02 CN CN2012200748790U patent/CN202487380U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572535A (en) * | 2015-12-30 | 2016-05-11 | 北京天诚同创电气有限公司 | Monitoring method, monitoring device and monitoring system of step-up transformer |
| CN110794226A (en) * | 2019-10-08 | 2020-02-14 | 云南电力技术有限责任公司 | Method and device for judging fused phase in three-phase three-column type distribution transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |
|
| CX01 | Expiry of patent term |