CN201789271U - Phase lack protection device of combined transformer - Google Patents
Phase lack protection device of combined transformer Download PDFInfo
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- CN201789271U CN201789271U CN2010202410934U CN201020241093U CN201789271U CN 201789271 U CN201789271 U CN 201789271U CN 2010202410934 U CN2010202410934 U CN 2010202410934U CN 201020241093 U CN201020241093 U CN 201020241093U CN 201789271 U CN201789271 U CN 201789271U
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Abstract
The utility model relates to a phase lock protection device of a combined transformer, which is capable of effectively avoiding damage of running of a combined transformer in a phase lack manner to electric equipment and comprises an electronic phase lack protector DQB. A low-voltage main input switch tripping button SB, a low-voltage main input switch auxiliary switch DF and a low-voltage main input switch shunt trip coil FQ are connected onto a phase line of the transformer, the front ends of the low-voltage main input switch auxiliary switch DF and the low-voltage main input switch shunt trip coil FQ are connected with a fifth pin of the electronic phase lack protector DQB by stop buttons DB, the rear ends of the low-voltage main input switch auxiliary switch DF and the low-voltage main input switch shunt trip coil FQ are connected with a sixth pin of the electronic phase lack protector DQB via stop buttons SB, a fourth pin of the electronic phase lack protector DQB is connected with a zero line, and a first pin, a second pin and a third pin of the electronic phase lack protector DQB are connected with a phase line L1, a phase line L2 and a phase line L3 via circuit breakers QF. The additionally installed phase lack protection device can avoid possible damage to load equipment due to running in a phase lack manner, and improves power supply reliability.
Description
Technical field
The utility model relates to a kind of phase-lacking protective device that can effectively avoid the combined transformer phase-deficient operation to the combined transformer of power consumption equipment infringement.
Background technology
Along with deepening continuously of China's upgrading urban and rural power grids, particularly urban distribution network is progressively implemented " cable down ground engineering ", and combined transformer is because of it has that volume is little, all insulation, overload capacity is strong and series of advantages such as easy for installation is more and more used.Begin to be generalized to present being extensive use of from combined transformer in China, approximately experienced time less than 10 years, all this product has been proposed many opinions in the applicability of China from Electric Design department to manufactory during this time, these opinions have played positive effect to the production domesticization of combined transformer.Yet; the just present actual operating position of combined transformer; majority is not taked the open-phase protection measure, and this illustrates that the open-phase protection problem of this product does not cause enough attention of Electric Design department yet, and the harmfulness of combined transformer phase-deficient operation is not had general and deep understanding.Combined transformer is in the process of using, if fault such as the single-phase shorted to earth of low pressure takes place or the overload of long period occurs, particularly summer high temperature overload all causes high-pressure side plug type fuse fusing probably.
At present homemade combined transformer generally adopts the Dyn11 connection for adapting to China 10kV electrical network feature.High voltage fuse has and is placed in the angle, also has to be placed on outside the angle; Transformer core has three-phase three-column, and three-phase and four-pole or five posts are also arranged.But common way is, the combined transformer of three-phase and four-pole or five posts, and its high voltage fuse is placed in the angle, and the combined transformer of three-phase three-column, its high voltage fuse is placed on outside the angle.The main flow of combined transformer product is still the structure of placing outside the three-phase three-column high voltage fuse angle at present, and its mode of connection as shown in Figure 1.When the high pressure A of this series products phase fuse failure, its high pressure winding forms two parallel branches as can be seen, and A, the series connection of C phase winding are a branch road, and the B phase winding is a branch road, the line voltage U
BCFor being applied to the power supply on the parallel branch, so institute's making alive is half of its rated voltage on the A, C phase winding, and B phase winding institute making alive is a rated voltage, so low voltage voltage: U
B0=U
2N, U
A0=U
C0=0.5U
2NBe that the low pressure three-phase voltage is a full voltage, two half voltages are when above non-full-phase state time long (be generally a few minutes to ten minute about), then A, the load-carrying electric equipment of C two-phase, as meetings such as motor, refrigerator, air-conditioning and washing machines because of serious under-voltage burning.
Summary of the invention
In case the purpose of this utility model is to overcome the deficiencies in the prior art and provides a kind of combined transformer open-phase running status to occur; it can make main switch disconnect by the decompression coil of control low pressure main switch; secondary load is cut off, thereby effectively avoided the phase-lacking protective device of combined transformer phase-deficient operation the combined transformer of power consumption equipment infringement.
The purpose of this utility model is achieved in that and comprises electronics open phase protector DQB; it is characterized in that: on the phase line of transformer, be connected with the low pressure master and advance switch opening button SB; low pressure master advances switch auxiliary switch DF and the low pressure master advances switch shunt opening coil FQ; advancing switch auxiliary switch DF the low pressure master is connected with 5 pin of electronics open phase protector DQB by stop button SB with the front end that the low pressure master advances switch shunt opening coil FQ; advancing switch auxiliary switch DF the low pressure master is connected with 6 pin of electronics open phase protector DQB by stop button SB with the front end that the low pressure master advances switch shunt opening coil FQ; 4 pin of electronics open phase protector DQB connect zero line, 1 of electronics open phase protector DQB; 2; 3 pin connect triple line L1 by circuit breaker Q F; L2; L3.
The utlity model has following good effect: the possibility that the combined transformer phase-deficient operation takes place progressively rises along with the prolongation of its back operating period of putting into operation, reason is that the load factor of combined transformer is raising gradually, the complexity of load branch circuit and electricity consumption progressively increases, and electric insulation can wear out etc. gradually.And by installing the infringement that the utility model can avoid phase-deficient operation to cause load equipment additional, in fact also be the reliability that has improved power supply.
Description of drawings
Fig. 1 is a combined transformer angle external form product winding diagram.
Fig. 2 is the control elementary diagram of open-phase protection of the present utility model.
Embodiment
As shown in Figure 2; the utility model comprises electronics open phase protector DQB; it is characterized in that: on the phase line of transformer, be connected with the low pressure master and advance switch opening button SB; low pressure master advances switch auxiliary switch DF and the low pressure master advances switch shunt opening coil FQ; advancing switch auxiliary switch DF the low pressure master is connected with 5 pin of electronics open phase protector DQB by stop button SB with the front end that the low pressure master advances switch shunt opening coil FQ; advancing switch auxiliary switch DF the low pressure master is connected with 6 pin of electronics open phase protector DQB by stop button SB with the front end that the low pressure master advances switch shunt opening coil FQ; 4 pin of electronics open phase protector DQB connect zero line, 1 of electronics open phase protector DQB; 2; 3 pin connect triple line L1 by circuit breaker Q F; L2; L3.Circuit breaker Q F model is DZ47-5A/3P.The on-load switch of combined transformer is generally the artificial mechanism operation.For the combined transformer product of placing outside the three-phase three-column high voltage fuse angle; solving most economical, the reliable method of its phase-deficient operation is to install the combined transformer phase-lacking protective device additional at low-pressure chamber; in case open-phase running status appears in combined transformer; it can make main switch disconnect by the decompression coil of control low pressure main switch; secondary load is cut off, thereby effectively avoided of the infringement of combined transformer phase-deficient operation power consumption equipment.
Claims (1)
1. the phase-lacking protective device of a combined transformer; comprise electronics open phase protector DQB; it is characterized in that: on the phase line of transformer, be connected with the low pressure master and advance switch opening button SB; low pressure master advances switch auxiliary switch DF and the low pressure master advances switch shunt opening coil FQ; advancing switch auxiliary switch DF the low pressure master is connected with 5 pin of electronics open phase protector DQB by stop button SB with the front end that the low pressure master advances switch shunt opening coil FQ; advancing switch auxiliary switch DF the low pressure master is connected with 6 pin of electronics open phase protector DQB by stop button SB with the rear end that the low pressure master advances switch shunt opening coil FQ; 4 pin of electronics open phase protector DQB connect zero line, 1 of electronics open phase protector DQB; 2; 3 pin connect triple line L1 by circuit breaker Q F; L2; L3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202410934U CN201789271U (en) | 2010-06-29 | 2010-06-29 | Phase lack protection device of combined transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202410934U CN201789271U (en) | 2010-06-29 | 2010-06-29 | Phase lack protection device of combined transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201789271U true CN201789271U (en) | 2011-04-06 |
Family
ID=43821222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202410934U Expired - Fee Related CN201789271U (en) | 2010-06-29 | 2010-06-29 | Phase lack protection device of combined transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201789271U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018983A (en) * | 2016-07-13 | 2016-10-12 | 苏州长量电器有限公司 | Phase failure detection single-sided comprehensive detection method |
| CN106159901A (en) * | 2016-08-19 | 2016-11-23 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
| CN110632427A (en) * | 2019-10-08 | 2019-12-31 | 云南电力技术有限责任公司 | Method and device for judging core column structure in distribution 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 |
-
2010
- 2010-06-29 CN CN2010202410934U patent/CN201789271U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018983A (en) * | 2016-07-13 | 2016-10-12 | 苏州长量电器有限公司 | Phase failure detection single-sided comprehensive detection method |
| CN106159901A (en) * | 2016-08-19 | 2016-11-23 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
| CN106159901B (en) * | 2016-08-19 | 2018-05-22 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
| CN110632427A (en) * | 2019-10-08 | 2019-12-31 | 云南电力技术有限责任公司 | Method and device for judging core column structure in distribution 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 |
| CN110632427B (en) * | 2019-10-08 | 2022-02-01 | 云南电力技术有限责任公司 | Method and device for judging core column structure in distribution transformer |
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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: 20110406 Termination date: 20110629 |