CN106384658B - A kind of oil-immersed inverted current transformer major insulation wraps up coupling method - Google Patents

A kind of oil-immersed inverted current transformer major insulation wraps up coupling method Download PDF

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Publication number
CN106384658B
CN106384658B CN201611015136.5A CN201611015136A CN106384658B CN 106384658 B CN106384658 B CN 106384658B CN 201611015136 A CN201611015136 A CN 201611015136A CN 106384658 B CN106384658 B CN 106384658B
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China
Prior art keywords
major insulation
wrapping
portion major
lead portion
wrapped
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CN201611015136.5A
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Chinese (zh)
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CN106384658A (en
Inventor
张伟明
薛晚道
王文娣
孟令
徐君江
金星
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BAODING TIANWEI TRANSFORMER Co Ltd
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BAODING TIANWEI TRANSFORMER Co Ltd
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Priority to CN201611015136.5A priority Critical patent/CN106384658B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • 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
    • H01F27/288—Shielding
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • H01F41/12—Insulating of windings
    • H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Bodies (AREA)

Abstract

The present invention relates to a kind of oil-immersed inverted current transformer major insulation to wrap up coupling method, belongs to technical field of mutual inductor manufacture.Technical scheme is：Fairlead（1）The wrapping of lead portion major insulation wrapped up using whole cable paper, or wrapped up with cable paper tape or crimped paper band half lap, be machine wrapping；Fairlead（1）The wrapping of lead portion major insulation after the completion of, then carry out ring portion major insulation wrapping, the wrapping of ring portion major insulation is using machine or wrapping, and being coupled with lead portion major insulation by hand；Lead portion major insulation, using multiple end screens（3）Partial-pressure structure, and reserve equal length but the unequal stepped ladder of thickness is poor, it is easy to be coupled with ring portion major insulation.The positive effect of the present invention：Lead portion major insulation is wrapped up using machine, is improved wrapping quality and wrapping efficiency, simple in construction, rational technology, is improved product total quality.

Description

A kind of oil-immersed inverted current transformer major insulation wraps up coupling method
Technical field
The present invention relates to a kind of oil-immersed inverted current transformer major insulation to wrap up coupling method, belongs to transformer manufacture skill Art field.
Background technology
Oil-immersed current transformer is divided into two kinds of oil immersed erected current transformer and oil-immersed inverted current transformer, oil The wrapping of vertical current transformer major insulation is soaked outside first winding, and first winding is generally " u "-shaped, and major insulation is wrapped up by machine Device is completed.Oil-immersed inverted current transformer major insulation is wrapped up outside secondary winding, generally wrapping by hand, wraps up efficiency Low, quality is unstable.
The content of the invention
It is an object of the invention to provide a kind of oil-immersed inverted current transformer major insulation to wrap up coupling method, lead portion Major insulation is wrapped up using machine, is improved wrapping quality and wrapping efficiency, simple in construction, rational technology, is improved product entirety matter Amount, solves produced problem in background technology.
Technical solution of the present invention：
A kind of oil-immersed inverted current transformer major insulation wraps up draw bail, includes fairlead, major insulation, end screen, master Screen, radome and secondary winding, a radome, radome and fairlead positive connection are set outside secondary winding；Set two Individual main screen, radome form main screen one with fairlead, connect low potential, the outermost position of lead portion major insulation and ring portion major insulation Main screen two is set, connects high potential；Fairlead dresses outside lead portion major insulation, passes through after fairlead wrapping lead portion major insulation Screw thread is linked together with radome, then wraps up ring portion major insulation；Lead portion major insulation is provided with multiple end screen partial-pressure structures, And reserve equal length but the unequal stepped ladder of thickness is poor, coupled with ring portion major insulation.
It the lead portion major insulation, can be wrapped up with whole cable paper, banded cable or crimped paper band half lap can also be used Wrapping.
A kind of oil-immersed inverted current transformer major insulation wraps up coupling method, includes following processing step：
Oil-immersed inverted current transformer major insulation is wrapped up, and divides two parts to carry out：The wrapping of lead portion major insulation is using whole Cable paper wrapping is opened, or is wrapped up with cable paper tape or crimped paper band half lap, for machine wrapping；Lead portion major insulation has been wrapped up Cheng Hou, then carry out ring portion major insulation wrapping, the wrapping of ring portion major insulation using machine or wrapping by hand, and with lead portion major insulation Coupled；Lead portion major insulation, using multiple end screen partial-pressure structures, and reserve equal length but the unequal ladder of thickness Shape ladder is poor, is easy to be coupled with ring portion major insulation.
The stepped ladder is poor, and connecting mode is as follows：
Power-frequency voltage U in short-term is resistant to by productsPermit with the axial power frequency of insulation and use field strength ElDetermine the overall length of stepped ladder difference Spend LC；
LC≥Us/El
N equal length cascaded surface is separated into, each cascaded surface length is S；
S= LC/n
Each ladder radius surface ykBy lead portion major insulation wrapping start radius rC, lead portion major insulation wrapping completion Radius R and step number n is determined；
yk=rC(R/rC)k/n
Step number wants value reasonable, it is impossible to it is very few, it is very few can make at cascaded surface to climb electric-field strength radially along face to exceed permit with climbing Electric-field strength, it is possible to cause to climb electricity；Can not be excessive, excessive complex process, enforcement difficulty is big.
The positive effect of the present invention：Lead portion major insulation is wrapped up using machine, improves wrapping quality and wrapping efficiency, It is simple in construction, rational technology, improve product total quality.
Brief description of the drawings
Fig. 1 is embodiments of the invention schematic diagram；
In figure：1 fairlead, 2 major insulations, 3 end screens, 4 main screens two, 5 stepped ladders are poor, 6 radomes, 7 secondary windings.
Embodiment
Below in conjunction with the accompanying drawings, by embodiment, the present invention will be further described.
A kind of oil-immersed inverted current transformer major insulation wraps up draw bail, comprising fairlead 1, major insulation 2, end screen 3, Main screen, radome 6 and secondary winding 7, set a radome 6 outside secondary winding 7, and radome 6 reliably joins with fairlead 1 Connect；Two main screens are set, and radome 6 forms main screen one with fairlead 1, connects low potential, lead portion major insulation and ring portion master are exhausted The outermost position of edge sets main screen 24, connects high potential；Fairlead 1 wraps up major insulation 2, and fairlead 1 passes through after wrapping up major insulation 2 Screw thread is linked together with radome 6, then wraps up ring portion major insulation；Lead portion major insulation is provided with multiple partial pressure knots of end screen 3 Structure, and equal length but the unequal stepped ladder poor 5 of thickness are reserved, coupled with ring portion major insulation.
The major insulation of the lead portion, wrapped up with whole cable paper, or with banded cable, or with crimped paper with half-stack package Prick.
A kind of oil-immersed inverted current transformer major insulation wraps up coupling method, includes following processing step：
Oil-immersed inverted current transformer major insulation is wrapped up, and divides two parts to carry out：The lead portion major insulation bag of fairlead 1 Prick and wrapped up using whole cable paper, or wrapped up with banded cable, or with crimped paper band half lap, be machine wrapping；The lead of fairlead 1 After the completion of the major insulation wrapping of part, then ring portion major insulation wrapping being carried out, the wrapping of ring portion major insulation is wrapped up using machine or by hand, and Coupled with lead portion major insulation；Lead portion major insulation, using multiple partial-pressure structures of end screen 3, and reserve equal length But the unequal stepped ladder of thickness is poor, is easy to be coupled with ring portion major insulation.
The stepped ladder is poor, and connecting mode is as follows：
Power-frequency voltage U in short-term is resistant to by productsPermit with the axial power frequency of insulation and use field strength ElDetermine the overall length of stepped ladder difference Spend LC；
LC≥Us/El
N equal length cascaded surface is separated into, each cascaded surface length is S；
S= LC/n
Each ladder radius surface ykBy lead portion major insulation wrapping start radius rC, lead portion major insulation wrapping completion Radius R and step number n is determined；
yk=rC(R/rC)k/n
Stepped ladder difference is completed to determine；
Step number wants value reasonable, it is impossible to it is very few, it is very few can make at cascaded surface to climb electric-field strength radially along face to exceed permit with climbing Electric-field strength, it is possible to cause to climb electricity；Can not be excessive, excessive complex process, enforcement difficulty is big.
Embodiment：It is poor that stepped ladder is designed by taking 110kV current transformers as an example.It is resistant to power-frequency voltage U in short-termsTake 230kV, The axial power frequency of insulation, which permits, uses field strength ElTake 1.25kV/mm, the total length L of stepped ladder differenceC≥Us/El=230/1.25= 184mm, take LC=200mm, is divided into 10 equal length cascaded surfaces, and each cascaded surface length is S=LC/ n=200/10=20mm, Major insulation wrapping start radius rCTake 31.4mm, major insulation wrapping completion radius R takes 57.7mm, then the 1st ladder from inside to outside The radius y in face1=rC(R/rC)1/n=31.4（57.7/31.4）1/10=33.4mm, by that analogy y2=35.5mm, y3=37.7mm, y4= 40.1mm y5=42.6mm, y6=45.3mm, y7=48.1mm, y8=51.1mm, y9=54.3mm, y10=57.7mm。

Claims (1)

1. a kind of oil-immersed inverted current transformer major insulation wraps up coupling method, it is characterised in that includes following processing step：
Oil-immersed inverted current transformer major insulation is wrapped up, and divides two parts to carry out：Fairlead（1）Lead portion major insulation wrapping Wrapped up using whole cable paper, or cable paper band or crimped paper band half lap are wrapped up, and are wrapped up for machine；Fairlead（1）Leading part Dividing after the completion of major insulation wrapping, then carry out ring portion major insulation wrapping, the wrapping of ring portion major insulation is wrapped up using machine or by hand, and with Lead portion major insulation is coupled；Lead portion major insulation, using multiple end screens（3）Partial-pressure structure, and reserve equal length But the unequal stepped ladder of thickness is poor, is easy to be coupled with ring portion major insulation；The stepped ladder is poor, and connecting mode is such as Under：
Power-frequency voltage U in short-term is resistant to by productsPermit with the axial power frequency of insulation and use field strength ElDetermine the total length of stepped ladder difference LC；
LC≥Us/El
N equal length cascaded surface is separated into, each cascaded surface length is S；
S= LC/n
Each ladder radius surface ykBy lead portion major insulation wrapping start radius rC, lead portion major insulation wrapping completion radius R Determined with step number n；
yk=rC(R/rC)k/n
Stepped ladder difference is completed to determine.
CN201611015136.5A 2016-11-18 2016-11-18 A kind of oil-immersed inverted current transformer major insulation wraps up coupling method Active CN106384658B (en)

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Publication number Priority date Publication date Assignee Title
CN109360712B (en) * 2018-11-27 2023-10-17 保定天威互感器有限公司 External current transformer for transformer and application method thereof
CN113972066B (en) * 2020-07-22 2024-03-29 特变电工康嘉(沈阳)互感器有限责任公司 Method for controlling main insulation wrapping size of inverted current transformer
CN113640728B (en) * 2021-08-11 2023-12-26 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 Disassembling and defect checking method for oil-immersed inverted current transformer
CN116344203B (en) * 2023-03-30 2023-09-05 山东泰开互感器有限公司 Wrapping process for body of oil-immersed inverted current transformer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521518A1 (en) * 1985-05-20 1986-11-20 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau High-voltage converter
CN203617118U (en) * 2013-12-26 2014-05-28 保定天威互感器有限公司 Oil-immersed inverted current transformer
CN204991430U (en) * 2015-09-24 2016-01-20 大连北方互感器集团有限公司 Oily just vertical electric capacity type insulation system current transformer
CN206163303U (en) * 2016-11-18 2017-05-10 保定天威互感器有限公司 Draw bail is wrapped to oily inverted type current transformer major insulation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521518A1 (en) * 1985-05-20 1986-11-20 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau High-voltage converter
CN203617118U (en) * 2013-12-26 2014-05-28 保定天威互感器有限公司 Oil-immersed inverted current transformer
CN204991430U (en) * 2015-09-24 2016-01-20 大连北方互感器集团有限公司 Oily just vertical electric capacity type insulation system current transformer
CN206163303U (en) * 2016-11-18 2017-05-10 保定天威互感器有限公司 Draw bail is wrapped to oily inverted type current transformer major insulation

Non-Patent Citations (1)

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Title
油浸倒立式电流互感器主绝缘电场分析与优化设计;阎秀恪等;《电工技术学报》;20140131;第29卷(第1期);37-43 *

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