KR20170009040A - Transformer having center lead entrance - Google Patents

Transformer having center lead entrance Download PDF

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Publication number
KR20170009040A
KR20170009040A KR1020150100393A KR20150100393A KR20170009040A KR 20170009040 A KR20170009040 A KR 20170009040A KR 1020150100393 A KR1020150100393 A KR 1020150100393A KR 20150100393 A KR20150100393 A KR 20150100393A KR 20170009040 A KR20170009040 A KR 20170009040A
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KR
South Korea
Prior art keywords
lead
transformer
winding
turret
insulation
Prior art date
Application number
KR1020150100393A
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Korean (ko)
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KR101942375B1 (en
Inventor
최준석
Original Assignee
현대중공업 주식회사
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Priority to KR1020150100393A priority Critical patent/KR101942375B1/en
Publication of KR20170009040A publication Critical patent/KR20170009040A/en
Application granted granted Critical
Publication of KR101942375B1 publication Critical patent/KR101942375B1/en

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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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • 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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

The present invention relates to a transformer having a center lead connection structure and, more specifically, to a transformer having a center lead connection structure wherein a tap winding exists on the outside of a high voltage winding. The transformer having a center lead connection structure comprises: a lead turret connected to an outer case of a transformer to provide a path of a lead; a lead to connect a high voltage bushing and a high voltage winding in the lead turret; a pipe shield with insulation, enclosing the lead; an insulation barrier enclosing the outside of the high voltage winding; and a lead support body to fix the pipe shield with insulation, to the lead turret.

Description

TRANSFORMER HAVING CENTER LEAD ENTRANCE < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer having a center lead connection structure, and more particularly to a transformer having a center lead connection structure in which a tap winding is present outside a high voltage winding.

1 is a longitudinal sectional view showing a transformer having a conventional central lead connection structure.

As shown in the figure, a transformer having a central lead connection structure has a configuration in which a tap winding 20 is disposed outside a high-voltage winding 10.

The outer portion of the high voltage winding 10 is surrounded by an insulating barrier 12 and the tap winding 20 is disposed outside the insulating barrier 12.

The high-voltage winding 10 is connected to the high-voltage bushing 30 through the lead 40. [

Conventionally, a cylindrical internal shield 50 is used to fasten the high-voltage winding 10 and the lead 40. [

2 is a cross-sectional view of a transformer having a conventional central lead connection structure.

As shown in the figure, the internal shield 50 is supported through the internal shield support 60. The internal shield support 60 has a structural shape in which the insulation shield 12 is fastened together with the insulating barrier 12 The gap between the high-voltage winding 10 and the tab winding 20 is spaced by a predetermined distance or more.

However, this conventional structure has a disadvantage that it is vulnerable to short-circuit mechanical force because the structure for supporting the uppermost and lowermost tabs between the outermost tabs is fixed to the insulating barrier 12 in the form of a ring.

It is an object of the present invention to provide a transformer which reduces the amount of the tap winding and the core size by reducing the separation distance between the high-voltage winding and the tap winding.

Another object of the present invention is to provide a transformer capable of reducing the lead-out portion spacing to reduce the winding height of the tap winding.

Another object of the present invention is to improve the structural strength of the lead to improve the structural stability of the tap winding in the event of a short circuit.

It is still another object of the present invention to provide a transformer capable of reducing the work flow by simplifying the structure.

The present invention relates to a transformer having a center lead connection structure, comprising: a lead turret connected to a transformer enclosure to provide a path of a lead; A lead connecting the high-pressure bushing and the high-voltage winding within the lead turret; A pipe shield with insulation surrounding said lead; An insulation barrier surrounding the outside of the high voltage winding; And a lead support for fixing the insulation pipe shield to the lead turret.

The insulating pipe shield preferably includes an aluminum pipe and an insulating material provided on the inside or outside of the aluminum pipe.

The insulating barrier may include a bending portion surrounding the periphery of the insulating pipe shield.

It is further preferable that the bent portion is formed in a U-shaped cross section opened toward the outside and a static ring is provided in the opened portion.

The transformer according to the present invention does not use an internal shield, thereby reducing the insulation distance between the high-voltage winding and the tap winding.

Further, the transformer according to the present invention is provided with an electrostatic ring at the lead portion to which the lead is connected, thereby improving the insulation stability between the high-voltage winding lead and the tab winding, thereby reducing the gap between the upper and lower tab wires.

In addition, an integral bend portion is formed between the upper and lower tab winding and the insulating barrier, thereby improving the structural stability of the tab winding in the event of a short circuit.

1 is a longitudinal sectional view showing a transformer having a conventional central lead connection structure.
2 is a cross-sectional view of a transformer having a conventional central lead connection structure.
3 is a longitudinal sectional view showing a transformer having a center lead connection structure according to an embodiment of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning and the inventor shall properly define the concept of the term in order to describe its invention in the best possible way It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. It should be noted that the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It should be understood that various equivalents and modifications are possible.

3 is a longitudinal sectional view showing a transformer having a center lead connection structure according to an embodiment of the present invention.

As shown, a transformer having a central lead connection structure according to an embodiment of the present invention includes a high voltage winding 110, a tap winding 120, a lead turret 210, a lead 140, an insulating pipe shield 145, An insulating barrier 112, a lead support 150, and an electrostatic ring 114.

The high-voltage winding 110 is provided to surround a core (not shown). The outer circumferential surface of the high-voltage winding 110 is insulated through the insulating barrier 112. The insulating barriers 112 are formed in a multilayer structure in which insulators are spaced apart from each other in order to secure insulation performance.

The tab winding 120 is disposed outside the insulating barrier 112 and disposed above and below the lead connecting portion.

The present invention is characterized in that the interval between the up and down positions of the tap winding 120 can be reduced by deleting the conventional internal shield (50 in FIG. 1).

The lead turret 210 is connected to the transformer enclosure 200 and provides a lead path of the lead 140. The lead turret 210 is formed in a pipe shape and has a horizontal section 210a and a vertical section.

A lead 140 connecting the high-voltage bushing 130 and the high-voltage winding is formed inside the lead turret 210.

Further, the lead 140 disposed inside the lead turret 210 is surrounded by the insulating pipe shield 145.

The insulating pipe shield 145 includes a pipe made of aluminum and an insulating material provided on the inside or outside of the aluminum material pipe. The present invention is characterized in that the weight of the lead structure is reduced by using aluminum as a material of the insulating pipe shield.

The structure of fixing the leads by fixing the internal shield to the winding side has been modified so that the lead support body 150 is provided in the horizontal section 210a of the lead turret 210, The insulation distance between the high voltage winding 110 and the tap winding 120 is reduced by fixing the insulating pipe shield 140 and the insulation pipe shield 145.

The transformer according to the present invention has the effect of reducing the insulation distance between the high voltage winding 110 and the tap winding 120 by reducing the distance due to the structure supporting the conventional internal shield.

The lead supporting body 150 is formed to surround the insulating pipe shield 145 and is formed to be fastened to the inside of the horizontal section 210a of the lead turret 210. [ Such a fastening structure provides excellent mechanical connection strength as compared to a structure in which a conventional internal shield is connected to the periphery of an insulating barrier.

In addition, the internal shield is removed from the lead connecting portion, and the U-shaped bent portion 112a is integrally formed in the insulating barrier 112, thereby securing the insulation performance between the upper and lower winding tabs 120. [

The bent portion 112a has a U-shaped cross-sectional shape opened to the outside and is formed in an annular shape surrounding the periphery of the lead 140. [

And an electrostatic ring 114 is provided at an open portion of the bent portion 112a.

The electrostatic ring 114 improves the insulation safety between the lead 140 and the tab winding 120, thereby reducing the gap between the upper and lower tab windings 120. [

When such a structure is applied to a 500 kV transformer, the insulation distance between the high-voltage winding 110 and the tap winding 120 can be reduced to about 105 mm from the conventional 135 mm, and the gap between the upper and lower tab windings 120 is reduced to about 820 mm To 500 ~ 600mm.

This reduction of the spacing is possible because of the elimination of the structure for fixing the internal shield as described above and the insertion of the electrostatic ring 114 with the bending portion 112a in the insulating barrier 112, This is due to improvements.

This reduction in the insulation distance has the effect of reducing the diameter and weight of the tap winding, thereby reducing the manufacturing cost of the transformer and making the tap winding structure work simultaneously, thereby improving the workability.

In addition, the size and weight of the outer housing can be reduced, thereby reducing the flow rate of the insulating oil filled in the enclosure.

In addition, the structure in which the leads are fixed to the turret has the effect of providing superior strength to the short-circuit mechanical force as compared with the conventional structure using the internal shield.

It is to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the appended claims rather than by the foregoing detailed description. It is intended that all changes and modifications that come within the meaning and range of equivalency of the claims, as well as any equivalents thereof, be within the scope of the present invention.

110: High-voltage winding
112: Insulation barrier
112a:
114: Electrostatic ring
120: tap winding
130: High pressure bushing
140: Lead
145: Insulated pipe shield
150: lead support
200: Transformer enclosure
210: lead turret

Claims (4)

1. A transformer having a central lead connection structure,
A lead turret connected to the transformer enclosure to provide the path of the leads;
A lead connecting the high-pressure bushing and the high-voltage winding within the lead turret;
A pipe shield with insulation surrounding said lead;
An insulation barrier surrounding the outside of the high voltage winding; And
And a lead support for fixing the insulating pipe shield to the lead turret.
The method according to claim 1,
The insulation pipe shield
An aluminum pipe and an insulating material provided on the inside or outside of the aluminum pipe.
The method according to claim 1,
The insulating barrier
And a bent portion surrounding the periphery of the insulating pipe shield.
The method of claim 3,
Wherein the bent portion is formed in a U-shaped cross section opened toward the outside,
And an electrostatic ring is provided in the opened portion.
KR1020150100393A 2015-07-15 2015-07-15 Transformer having center lead entrance KR101942375B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150100393A KR101942375B1 (en) 2015-07-15 2015-07-15 Transformer having center lead entrance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150100393A KR101942375B1 (en) 2015-07-15 2015-07-15 Transformer having center lead entrance

Publications (2)

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KR20170009040A true KR20170009040A (en) 2017-01-25
KR101942375B1 KR101942375B1 (en) 2019-01-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110914935A (en) * 2017-07-31 2020-03-24 通用电器技术有限公司 Lead wire outlet assembly
CN112002544A (en) * 2020-07-16 2020-11-27 山东电力设备有限公司 Design method of novel ultra-high voltage wire outlet device and wire outlet device structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200440144Y1 (en) 2006-12-12 2008-05-27 영화산업전기 주식회사 2nd leading line withdrawl structure of Metering Out Fit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110914935A (en) * 2017-07-31 2020-03-24 通用电器技术有限公司 Lead wire outlet assembly
CN112002544A (en) * 2020-07-16 2020-11-27 山东电力设备有限公司 Design method of novel ultra-high voltage wire outlet device and wire outlet device structure

Also Published As

Publication number Publication date
KR101942375B1 (en) 2019-01-28

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