CN112992501A - Novel transformer balance winding grounding method - Google Patents
Novel transformer balance winding grounding method Download PDFInfo
- Publication number
- CN112992501A CN112992501A CN202110300318.1A CN202110300318A CN112992501A CN 112992501 A CN112992501 A CN 112992501A CN 202110300318 A CN202110300318 A CN 202110300318A CN 112992501 A CN112992501 A CN 112992501A
- Authority
- CN
- China
- Prior art keywords
- lead
- transformer
- copper bar
- oil tank
- grounding
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to a novel transformer balance winding grounding method, and belongs to the technical field of large-capacity transformer manufacturing. The technical scheme is as follows: and a ground plate (3) is welded on the tank bottom (6) of the lower oil tank section of the transformer, a lead copper bar (5) of the balance winding is connected with the ground plate (3) through a lead made of a copper strip (4), and the installation is completed before the cover is buckled on the upper oil tank section of the transformer. The invention has the beneficial effects that: the traditional balance sleeve and copper bar grounding is improved, and a lead copper bar of a balance winding is connected with a grounding plate on a lower-section oil tank; the ground plate is welded at the bottom of the lower oil tank, the lead made of the copper strip for the lead copper bar of the balance winding is connected with the ground plate before the buckling cover of the upper oil tank, and the lead is fastened by the fastening piece, so that the operation difficulty is greatly reduced, and the production cost is reduced.
Description
Technical Field
The invention relates to a novel transformer balance winding grounding method, and belongs to the technical field of large-capacity transformer manufacturing.
Background
When the large-capacity transformer is Y, Y-connected, a balanced winding with a delta connection is usually added to shield 3N (N =1,2,3 …) subharmonics, and the balanced winding needs to be grounded at one point. Referring to fig. 2, in the prior art, after the balance winding is connected to form a triangle inside, the two balance bushings are used to respectively lead out the leading-out ends of the leads of the balance winding, and after the balance bushings are connected by inter-bushing copper bars outside, the grounding copper bars are fixed on the insulators and are led to the ground through the insulators. The prior art has the following problems: the structure is unreasonable, the operation difficulty is high, and the production cost is high.
Disclosure of Invention
The invention aims to provide a novel grounding method for a balance winding of a transformer, wherein a lead copper bar of the balance winding is connected with the bottom of an oil tank by a copper belt in the oil tank, so that the operation difficulty is reduced, the production cost is reduced, and the problems in the background art are solved.
The technical scheme of the invention is as follows:
a ground plate is welded on the bottom of a lower oil tank of a transformer, a lead copper bar of a balance winding is connected with the ground plate through a lead made of a copper strip, and the installation is completed before a buckle cover of an upper oil tank of the transformer, so that the operation difficulty is greatly reduced.
A lead clamp is arranged on a lower iron yoke of the transformer, and a low-voltage copper bar of a low-voltage winding and a lead copper bar of a balance winding are fixed on the lead clamp; the ground plate is provided with two ground holes, the balance winding lead copper bar which is opposite to the ground plate is provided with two mounting holes, a copper strip is used for manufacturing a ground lead with holes at two ends, and the copper strip is respectively mounted on the balance winding lead copper bar and the ground plate by using a fastener and a disc spring.
The invention has the beneficial effects that: the traditional balance sleeve and copper bar grounding is improved, and a lead copper bar of a balance winding is connected with a grounding plate on a lower-section oil tank; the ground plate is welded at the bottom of the lower oil tank, the lead made of the copper strip for the lead copper bar of the balance winding is connected with the ground plate before the buckling cover of the upper oil tank, and the lead is fastened by the fastening piece, so that the operation difficulty is greatly reduced, and the production cost is reduced.
Drawings
FIG. 1 is a schematic view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of prior art balanced winding grounding;
in the figure: the low-voltage copper busbar comprises a low-voltage copper busbar 1, a lead clamp 2, a ground plate 3, a copper strip 4, a balance winding lead copper busbar 5, a box bottom 6, a lower iron yoke 7, an inter-sleeve copper busbar 11, a balance sleeve 12, an upper oil tank 13, a ground copper busbar 14 and an insulator 15.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Referring to the attached figure 1, a novel transformer balance winding grounding method is characterized in that a grounding plate 3 is welded on a box bottom 6 of a lower oil tank of a transformer, a balance winding lead copper bar 5 is connected with the grounding plate 3 through a lead made of a copper strip 4, and the installation is completed before an upper oil tank of the transformer is buckled with a cover, so that the operation difficulty is greatly reduced.
A lead clamp 2 is arranged on a lower iron yoke 7 of the transformer, and a low-voltage copper bar 1 of a low-voltage winding and a balanced winding lead copper bar are fixed on the lead clamp 2; the ground plate 3 is provided with two ground holes, the balance winding lead copper bar 5 facing the ground plate is provided with two mounting holes, a copper strip 4 is used for manufacturing a ground lead with holes at two ends, and the copper strip 4 is respectively mounted on the balance winding lead copper bar and the ground plate by using a fastener and a disc spring.
The method comprises the following specific operation steps: a 30mm thick ground plate 3 is welded at the bottom 6 of the lower oil tank of the transformer, the ground plate 3 is provided with two M12mm ground holes, and two 14mm phi mounting holes are formed in a balanced winding lead copper bar 5 which is opposite to the ground plate 3; and a grounding lead with holes at two ends is manufactured by the copper strip 4, and the copper strip 4 is respectively arranged on the balanced winding lead copper bar 5 and the grounding plate 3 by a fastener and a disc spring, so that the grounding is effectively grounded.
Referring to the attached figure 2, the grounding schematic diagram of the balance winding in the prior art is that after the inner parts are connected into a triangle, the outlet ends of the leads of the balance winding are respectively led out by two balance sleeves 12 on an upper oil tank 13 of the transformer, the balance sleeves are connected by inter-sleeve copper bars 11 at the outer parts and then connected with a grounding copper bar 14, and then the grounding copper bar 14 is fixed on an insulator 15 and led down to be grounded through the insulator 15.
Claims (2)
1. A novel transformer balance winding grounding method is characterized in that: a grounding plate (3) is welded on a box bottom (6) of the lower oil tank of the transformer, a lead copper bar (5) of the balance winding is connected with the grounding plate (3) through a lead made of a copper strip (4), and the installation is completed before the upper oil tank of the transformer is buckled, so that the operation difficulty is reduced.
2. The novel method for grounding the balanced winding of the transformer as claimed in claim 1, wherein: a lead clamp (2) is arranged on a lower iron yoke (7) of the transformer, and a low-voltage copper bar (1) of a low-voltage winding and a balanced winding lead copper bar are fixed on the lead clamp (2); the ground plate (3) is provided with two ground holes, the balance winding lead copper bar (5) which is opposite to the ground plate is provided with two mounting holes, a copper strip (4) is used for manufacturing a ground lead with holes at two ends, and the copper strip (4) is respectively mounted on the balance winding lead copper bar and the ground plate by using a fastener and a disc spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110300318.1A CN112992501A (en) | 2021-03-22 | 2021-03-22 | Novel transformer balance winding grounding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110300318.1A CN112992501A (en) | 2021-03-22 | 2021-03-22 | Novel transformer balance winding grounding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112992501A true CN112992501A (en) | 2021-06-18 |
Family
ID=76332739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110300318.1A Withdrawn CN112992501A (en) | 2021-03-22 | 2021-03-22 | Novel transformer balance winding grounding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112992501A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203397844U (en) * | 2013-08-16 | 2014-01-15 | 山东华驰变压器股份有限公司 | Bell-type oil tank ground connection structure |
| CN203617102U (en) * | 2013-12-25 | 2014-05-28 | 保定天威保变电气股份有限公司 | Transformer stabilizing winding lightning protection system |
| CN205487885U (en) * | 2015-11-30 | 2016-08-17 | 中国西电电气股份有限公司 | Middling pressure earthing knife -switch for CVT |
| CN206639675U (en) * | 2016-11-30 | 2017-11-14 | 保定保菱变压器有限公司 | A kind of transformer body earthing or grounding means |
| CN207264891U (en) * | 2017-06-20 | 2018-04-20 | 保定保菱变压器有限公司 | A kind of transformer grounding connection structure |
| CN209591756U (en) * | 2019-05-21 | 2019-11-05 | 保定天威保变电气股份有限公司 | A kind of ground lead connection structure |
| CN212725985U (en) * | 2020-09-11 | 2021-03-16 | 何建东 | Grounding box for power distribution network construction |
-
2021
- 2021-03-22 CN CN202110300318.1A patent/CN112992501A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203397844U (en) * | 2013-08-16 | 2014-01-15 | 山东华驰变压器股份有限公司 | Bell-type oil tank ground connection structure |
| CN203617102U (en) * | 2013-12-25 | 2014-05-28 | 保定天威保变电气股份有限公司 | Transformer stabilizing winding lightning protection system |
| CN205487885U (en) * | 2015-11-30 | 2016-08-17 | 中国西电电气股份有限公司 | Middling pressure earthing knife -switch for CVT |
| CN206639675U (en) * | 2016-11-30 | 2017-11-14 | 保定保菱变压器有限公司 | A kind of transformer body earthing or grounding means |
| CN207264891U (en) * | 2017-06-20 | 2018-04-20 | 保定保菱变压器有限公司 | A kind of transformer grounding connection structure |
| CN209591756U (en) * | 2019-05-21 | 2019-11-05 | 保定天威保变电气股份有限公司 | A kind of ground lead connection structure |
| CN212725985U (en) * | 2020-09-11 | 2021-03-16 | 何建东 | Grounding box for power distribution network construction |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210618 |
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| WW01 | Invention patent application withdrawn after publication |