CN203617102U - Transformer stabilizing winding lightning protection system - Google Patents

Transformer stabilizing winding lightning protection system Download PDF

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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
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CN
China
Prior art keywords
winding
transformer
arrester
copper bar
stabilizing
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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.)
Active
Application number
CN201320861668.6U
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Chinese (zh)
Inventor
史瑞果
肖达
肖军科
杨静
赵丽杰
赵威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baoding Tianwei Baobian Electric Co Ltd
Original Assignee
Baoding Tianwei Baobian Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Baoding Tianwei Baobian Electric Co Ltd filed Critical Baoding Tianwei Baobian Electric Co Ltd
Priority to CN201320861668.6U priority Critical patent/CN203617102U/en
Application granted granted Critical
Publication of CN203617102U publication Critical patent/CN203617102U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

A kind of transformer balance winding lightning protection system
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.
CN201320861668.6U 2013-12-25 2013-12-25 Transformer stabilizing winding lightning protection system Active CN203617102U (en)

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 Active 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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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