CN203617102U - Transformer stabilizing winding lightning protection system - Google Patents
Transformer stabilizing winding lightning protection system Download PDFInfo
- Publication number
- CN203617102U CN203617102U CN201320861668.6U CN201320861668U CN203617102U CN 203617102 U CN203617102 U CN 203617102U CN 201320861668 U CN201320861668 U CN 201320861668U CN 203617102 U CN203617102 U CN 203617102U
- Authority
- CN
- China
- Prior art keywords
- winding
- transformer
- arrester
- copper bar
- stabilizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 title claims abstract description 47
- 230000000087 stabilizing effect Effects 0.000 title abstract 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052802 copper Inorganic materials 0.000 claims abstract description 36
- 239000010949 copper Substances 0.000 claims abstract description 36
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011787 zinc oxide Substances 0.000 claims abstract description 11
- 230000007935 neutral effect Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Abstract
The utility model relates to a transformer stabilizing winding lightning protection system and belongs to the technical field of transformer equipment. The technical scheme adopted by the utility model is as follows: the transformer stabilizing winding lightning protection system comprises a connecting copper sheet (1), a stabilizing winding A (2), a stabilizing winding B (3), a grounded copper bar (4) and an arrester (5), wherein the stabilizing winding A (2) and the stabilizing winding B (3) are connected by virtue of the connecting copper sheet; one end of the grounded copper bar is fixedly arranged on the connecting copper sheet, and the other end of the grounded copper bar is grounded; the grounded copper bar is vertical to the connecting copper sheet; the grounded copper bar is provided with the arrester (5); the arrester is a zinc oxide arrester. When the transformer stabilizing winding lightning protection system is in normal operation, the zinc oxide arrester has a muA-level current, so that the stabilizing windings are in an open circuit state, and an asymmetric voltage can not be induced on a low-voltage winding, and thus low-voltage three-phase voltages to ground are balanced; when the stabilizing windings suffer overvoltages, the arrester is in a grounded state, so that a transformer is effectively protected.
Description
Technical field
The utility model relates to a kind of transformer balance winding lightning protection system, belongs to transformer equipment technical field.
Background technology
For transformer, its neutral grounding mode is: high pressure neutral-point solid ground, sometimes according to system needs, require low pressure isolated neutral, and according to national standard, ground connection after balance winding terminal N1, N2 short circuit.Its winding is arranged as: iron core-balance winding-low pressure winding-high pressure winding-pressure regulation winding.Work as high voltage supply, low-pressure side zero load, due to low pressure isolated neutral, its neutral point voltage mainly produces by the capacitive coupling between winding, again due to balance winding N1, N2 ground connection (a both phase ground connection), like this, electric capacity three-phase imbalance between low pressure and balance winding, thus there will be the displacement of low pressure neutral point voltage, low voltage three-phase voltage to earth imbalance while causing zero load, when serious, may exceed the value of transformer operating standard regulation, bring hidden danger to the safe operation of electric power system.
Utility model content
The utility model object is to provide a kind of transformer balance winding lightning protection system, after balance winding terminal short circuit, add zinc oxide arrester ground, make balance winding almost in open-circuit condition, avoid occurring low pressure neutral point voltage offset phenomena, solve the problem existing in background technology.
The technical solution of the utility model is:
A kind of transformer balance winding lightning protection system, comprise and connect copper sheet, balance winding A, balance winding B, grounding copper bar and lightning arrester, balance winding A connects by being connected copper sheet with balance winding B, grounding copper bar one end is fixed on and connects on copper sheet, other end ground connection, grounding copper bar is arranged vertically with being connected copper sheet, and grounding copper bar is provided with lightning arrester, and described lightning arrester is zinc oxide arrester.
Described zinc oxide arrester is positioned at the lower end of grounding copper bar.
Adopt the utility model, after balance winding terminal short circuit, add zinc oxide arrester ground, while normally operation, zinc oxide arrester presents μ A level electric current, make balance winding almost in open-circuit condition, just can on low pressure winding, not induce asymmetrical voltage, make low voltage three-phase voltage to earth balance.In the time that balance winding meets with overvoltage, lightning arrester presents ground state, thereby effectively protects transformer.
The beneficial effects of the utility model are: avoid occurring low pressure neutral point voltage offset phenomena, effectively protect transformer, eliminated the potential safety hazard of electrical network.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
In figure: connect copper sheet 1, balance winding A2, balance winding B3, grounding copper bar 4, lightning arrester 5.
Embodiment
Below in conjunction with accompanying drawing, by example, the utility model is described in further detail.
With reference to accompanying drawing 1, a kind of transformer balance winding lightning protection system, comprise and connect copper sheet 1, balance winding A2, balance winding B3, grounding copper bar 4 and lightning arrester 5, balance winding A2 with balance winding B3 by being connected after copper sheet 1 short circuit, again by grounding copper bar 4 ground connection, grounding copper bar 4 is arranged vertically with being connected copper sheet 1, and lightning arrester 5 is fixed in grounding copper bar 4 lower ends, and described lightning arrester 5 is zinc oxide arrester.
When normal operation, zinc oxide arrester presents μ A level electric current, makes balance winding almost in open-circuit condition, just can on low pressure winding, not induce asymmetrical voltage, makes low voltage three-phase voltage to earth balance.In the time that balance winding meets with overvoltage, lightning arrester presents ground state, thereby effectively protects transformer.
Claims (2)
1. a transformer balance winding lightning protection system, it is characterized in that comprising and connect copper sheet (1), balance winding A(2), balance winding B(3), grounding copper bar (4) and lightning arrester (5), balance winding A(2) with balance winding B(3) by be connected copper sheet (1) connect, grounding copper bar (4) one end is fixed on and connects on copper sheet (1), other end ground connection, grounding copper bar (4) be connected copper sheet (1) and be arranged vertically, grounding copper bar (4) is provided with lightning arrester (5), and described lightning arrester (5) is zinc oxide arrester.
2. transformer balance winding lightning protection system according to claim 1, is characterized in that described zinc oxide arrester is positioned at the lower end of grounding copper bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861668.6U CN203617102U (en) | 2013-12-25 | 2013-12-25 | Transformer stabilizing winding lightning protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861668.6U CN203617102U (en) | 2013-12-25 | 2013-12-25 | Transformer stabilizing winding lightning protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617102U true CN203617102U (en) | 2014-05-28 |
Family
ID=50769731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320861668.6U Expired - Lifetime CN203617102U (en) | 2013-12-25 | 2013-12-25 | Transformer stabilizing winding lightning protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617102U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193564A (en) * | 2018-09-19 | 2019-01-11 | 南京南瑞继保电气有限公司 | Prevent the anti-ballistic blocking method for causing differential malfunction of balance winding CT polarity connection |
| CN112992501A (en) * | 2021-03-22 | 2021-06-18 | 保定天威保变电气股份有限公司 | Novel transformer balance winding grounding method |
-
2013
- 2013-12-25 CN CN201320861668.6U patent/CN203617102U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193564A (en) * | 2018-09-19 | 2019-01-11 | 南京南瑞继保电气有限公司 | Prevent the anti-ballistic blocking method for causing differential malfunction of balance winding CT polarity connection |
| CN112992501A (en) * | 2021-03-22 | 2021-06-18 | 保定天威保变电气股份有限公司 | Novel transformer balance winding grounding method |
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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: 20140528 |
|
| CX01 | Expiry of patent term |