CN105206400A - On-pillar distribution transformer with internal protection function - Google Patents
On-pillar distribution transformer with internal protection function Download PDFInfo
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- CN105206400A CN105206400A CN201510683432.1A CN201510683432A CN105206400A CN 105206400 A CN105206400 A CN 105206400A CN 201510683432 A CN201510683432 A CN 201510683432A CN 105206400 A CN105206400 A CN 105206400A
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Abstract
An on-pillar distribution transformer with an internal protection function comprises a high-voltage incoming line, an oil tank and a high-voltage winding, wherein a backup fuse and a three-phase magnetic latching interrupter are arranged in the oil tank; the backup fuse is in direct connection with the insulating sleeve of the high-voltage incoming line and the three-phase magnetic latching interrupter; the three-phase magnetic latching interrupter is connected with the high-voltage winding, arranged on an inner side surface of the oil tank, and higher than the top of an iron core upper yoke of the on-pillar distribution transformer. The on-pillar distribution transformer has the advantages that two-stage protection for overloading and breakdown, over-high oil temperature protection, lower-low oil level locking and manual closing function, load current breaking and closing function and the like are realized; equipment replacement is avoided during overload protection, so that repeated use is realized, power supply is restored fast, and the management cost is low; phase-failure operation of the transformer is avoided, so as to reduce the failure rate of the transformer and improve power supply reliability; the transformer can be switched in a loaded state, so as to insulate primary side power supply; operation at high oil temperature can be avoided effectively, so as to avoid failures caused by over-high oil temperature.
Description
Technical field
The present invention relates to one and have overload, high oil temperature protection, distribution transformer on the post of oil level too low locking closing by hand function, belongs to distribution transformer technical field.
Background technology
Distribution transformer adopt external high pressure side to install additional traditional protection mode that fuse switch and low-pressure side install circuit breaker additional on common post; this protected mode can affect by external environment condition and human factor; the reliability protected is caused to reduce; when high oil temperature in transformer and pasta decline; all can not get protection; the probability causing transformer to break down strengthens, and power supply quality and reliability can not be guaranteed.In addition, this traditional protection mode only adopts phase-splitting to excise fault, easily causes Transformer Phase-deficient Operation; Need after high voltage drop-out type fuse cutout action to change fuse, complicated operation, restore electricity slow, management cost rises.
Summary of the invention
The present invention is directed to the deficiency that distribution transformer resist technology on existing post exists, propose distribution transformer on a kind of protective value is good, reliability the is high post with built-in defencive function.
Distribution transformer on the post with built-in defencive function of the present invention, by the following technical solutions:
This transformer, comprise high pressure inlet wire, fuel tank and high pressure winding, be provided with backup fuse and three-phase magnetic in fuel tank and keep cut-off device, backup fuse keeps cut-off device to be directly connected with the insulating sleeve of high pressure inlet wire and three-phase magnetic respectively, three-phase magnetic maintenance cut-off device and high pressure winding switching.
Described three-phase magnetic keeps cut-off device to be arranged at the medial surface of fuel tank, and its position is higher than the top of yoke on the iron core of distribution transformer on post.On iron core, yoke top oil is oil temperature peak in fuel tank, oil temperature hottest point accurately can be delivered to three-phase magnetic and keep cut-off device.
The two-part protection, the high oil temperature that present invention achieves transformer overload and fault are protected, the too low locking of oil level divides the function such as/closing function, disjunction/closed load electric current; Compared with traditional protection scheme, tool has the following advantages:
1. during overload protection (magnetic keeps cut-off device action), do not need more exchange device, reusable, after getting rid of abnormal condition load or fault, can directly again close, restore electricity fast, management cost is low.
2. three-phase magnetic keeps cut-off device action to be that single-phase induction and three-phase are threaded off, and avoids Transformer Phase-deficient Operation, reduces transformer fault rate, improve power supply reliability.
3. keep cut-off device deciliter by three-phase magnetic, realize on-load switching transformer.
4. can cut-off device be kept as isolating switch three-phase magnetic, be used for isolating transformer primary side power supply.
5. transformer effectively can be avoided to run under high oil temperature, prevent high oil temperature from causing transformer fault.
6., when oil level is too low, three-phase magnetic keeps cut-off device locking closing by hand function.
Accompanying drawing explanation
Fig. 1 is the principle schematic of distribution transformer protection on post of the present invention.
Fig. 2 is the setting position schematic diagram that three-phase magnetic keeps cut-off device.
Fig. 3 is the surface structure schematic diagram that three-phase magnetic keeps cut-off device.
Fig. 4 is the principle schematic that three-phase magnetic keeps cut-off device.
Fig. 5 is the time-current chracteristic curve chart of distribution transformer protection on post of the present invention.
In figure: 1, backup fuse, 2, three-phase magnetic keeps cut-off device, 3, high pressure winding, 4, yoke on iron core, 5, cut-off device oil float.
Embodiment
Distribution transformer on the post with built-in defencive function of the present invention, the same with distribution transformer on existing post, also comprise yoke 4 on high pressure inlet wire, fuel tank, high pressure winding 3 and iron core.Its protection adopts the mode arranging high pressure backup fuse 1 and three-phase magnetic maintenance cut-off device 2 in fuel tank; as shown in Figure 1; backup fuse 1 keeps cut-off device 2 to be directly connected with the insulating sleeve of high pressure inlet wire and three-phase magnetic respectively, and three-phase magnetic keeps cut-off device 2 to be connected with high pressure winding 3 again.
Three-phase magnetic keeps cut-off device 2 to be arranged at the fuel tank medial surface of distribution transformer on post, and as shown in Figure 2, its position is higher than the top of yoke 4 on the iron core of distribution transformer on post.On iron core, yoke 4 top oil is oil temperature peak in fuel tank, oil temperature hottest point accurately can be delivered to three-phase magnetic and keep cut-off device 2.
As shown in Figure 3, three-phase magnetic keeps oil float 5 of cut-off device 2 to detect that transformer oil level is too low, by the locking of closing by hand function, avoids power transformer product to close a floodgate under low oil level state, improves the reliability that product puts into operation.
As shown in Figure 4, three-phase magnetic keeps the action of cut-off device 2 to be that single-phase induction and three-phase are threaded off, and avoids Transformer Phase-deficient Operation, reduces transformer fault rate, improve power supply reliability.
Three-phase magnetic keeps cut-off device 2 to have temperature and electric current dual factors sensitiveness; when overload or fault; big current flows through the transducer of cut-off device; the temperature of the metal material of transducer is caused to raise; when " loss of excitation " that reach transducer metal material is put, cut-off device 2 can be threaded off instantaneously, and is driven the moving contact separating brake be connected with transformer frequency response side by operating mechanism; smooth disconnection transformer frequency response, realizes high oil temperature defencive function.
When three-phase magnetic keeps the temperature of cut-off device 2 to put lower than " loss of excitation ", again can close, not need more exchange device, reusable.Available action handle keeps cut-off device 2 to carry out deciliter to three-phase magnetic, thus realizes the function of on-load switch.Three-phase magnetic keeps the operating grip of cut-off device 2 to have deciliter position instruction and reflecting at night design, can be used as isolating switch and uses.
According to the time-current chracteristic curve that Fig. 4 provides, illustrate that on post of the present invention, distribution transformer achieves the two-part protection of overload and fault.
Claims (2)
1. distribution transformer on a post with built-in defencive function; comprise high pressure inlet wire, fuel tank and high pressure winding; it is characterized in that; backup fuse and three-phase magnetic maintenance cut-off device is provided with in fuel tank; backup fuse keeps cut-off device to be directly connected with the insulating sleeve of high pressure inlet wire and three-phase magnetic respectively, and three-phase magnetic keeps cut-off device and high pressure winding switching.
2. distribution transformer on the post with built-in defencive function according to claim 1, is characterized in that, described three-phase magnetic keeps cut-off device to be arranged at the medial surface of fuel tank, and its position is higher than the top of yoke on the iron core of distribution transformer on post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510683432.1A CN105206400A (en) | 2015-10-20 | 2015-10-20 | On-pillar distribution transformer with internal protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510683432.1A CN105206400A (en) | 2015-10-20 | 2015-10-20 | On-pillar distribution transformer with internal protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105206400A true CN105206400A (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510683432.1A Pending CN105206400A (en) | 2015-10-20 | 2015-10-20 | On-pillar distribution transformer with internal protection function |
Country Status (1)
| Country | Link |
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| CN (1) | CN105206400A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799284A (en) * | 2016-08-31 | 2018-03-13 | 国网北京市电力公司 | High pressure protector for distribution transformer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080067320A (en) * | 2008-06-30 | 2008-07-18 | 임성황 | The oil transformer with the radiator constructed on the upside of oil tank |
| CN201608038U (en) * | 2009-11-04 | 2010-10-13 | 特变电工股份有限公司 | Compact oil-immersed type transformer |
| CN201877270U (en) * | 2010-08-10 | 2011-06-22 | 杭州钱江电气集团股份有限公司 | Completely self-protected amorphous distribution transformer |
| CN104465041A (en) * | 2013-09-25 | 2015-03-25 | 国家电网公司 | Oil-immersed transformer |
| CN104616861A (en) * | 2015-02-28 | 2015-05-13 | 国家电网公司 | Transformer rack |
| CN205050692U (en) * | 2015-10-20 | 2016-02-24 | 国网北京市电力公司电力科学研究院 | Distribution transformer on post with built -in protect function |
-
2015
- 2015-10-20 CN CN201510683432.1A patent/CN105206400A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080067320A (en) * | 2008-06-30 | 2008-07-18 | 임성황 | The oil transformer with the radiator constructed on the upside of oil tank |
| CN201608038U (en) * | 2009-11-04 | 2010-10-13 | 特变电工股份有限公司 | Compact oil-immersed type transformer |
| CN201877270U (en) * | 2010-08-10 | 2011-06-22 | 杭州钱江电气集团股份有限公司 | Completely self-protected amorphous distribution transformer |
| CN104465041A (en) * | 2013-09-25 | 2015-03-25 | 国家电网公司 | Oil-immersed transformer |
| CN104616861A (en) * | 2015-02-28 | 2015-05-13 | 国家电网公司 | Transformer rack |
| CN205050692U (en) * | 2015-10-20 | 2016-02-24 | 国网北京市电力公司电力科学研究院 | Distribution transformer on post with built -in protect function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799284A (en) * | 2016-08-31 | 2018-03-13 | 国网北京市电力公司 | High pressure protector for distribution transformer |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151230 |
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| RJ01 | Rejection of invention patent application after publication |