KR20140014732A - A bushing-type transformer for oil insulation instrument preventing partial discharge - Google Patents

A bushing-type transformer for oil insulation instrument preventing partial discharge Download PDF

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Publication number
KR20140014732A
KR20140014732A KR1020120081469A KR20120081469A KR20140014732A KR 20140014732 A KR20140014732 A KR 20140014732A KR 1020120081469 A KR1020120081469 A KR 1020120081469A KR 20120081469 A KR20120081469 A KR 20120081469A KR 20140014732 A KR20140014732 A KR 20140014732A
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KR
South Korea
Prior art keywords
insulator
partial discharge
transformer
enclosure
high voltage
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Application number
KR1020120081469A
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Korean (ko)
Inventor
구자열
공용식
정진호
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영화산업전기 주식회사
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Priority to KR1020120081469A priority Critical patent/KR20140014732A/en
Publication of KR20140014732A publication Critical patent/KR20140014732A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/26—Lead-in insulators; Lead-through insulators
    • 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
    • H01F27/022—Encapsulation
    • 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
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)

Abstract

Disclosed is a partial discharge preventing bushing-type transformer for oil insulation instrument. The bushing-type transformer capable of preventing partial discharge comprises: an insulator fixed at the top plate of an external compartment to insulate a coil within the external compartment from the external compartment; a high voltage conductor for delivering high voltages to the coil through the insulator; an insulator fixing bracket for fixing the lowermost wing of the insulator at the top plate of the external compartment; and a packing unit installed in a region between the lowermost wing of the insulator and the insulator fixing bracket and a region between the lowermost wing of the insulator and the top plate of the external compartment to relieve electric filed crowding by the high voltages. According to the present invention, it is possible to prevent partial discharge from a specific portion of the bushing-type transformer for oil insulation instrument and to maintain cushioning performance and airtightness of the surfaces of the insulator, whereby IED standards can be satisfied. Therefore, it is possible to develop a high performance product with an extended lifespan, and improve productivity through significantly simplified work processes.

Description

A bushing-type transformer for oil insulation instrument preventing partial discharge

The present invention relates to a transformer for a partial discharge preventing bushing type oil insulation instrument, and in particular, to mitigate electric field concentration in a specific portion of a ground conductor around a high pressure bushing of an oil insulation instrument transformer formed with insulator, so that partial discharge does not occur. A transformer for a partial discharge prevention bushing oil insulation instrument which can be used.

In general, instrument transformers are divided into instrument transformers (CT) and instrument transformers (PT) instrument transformers (MOFs).

In particular, the metering out fit (MOF), which is composed of a combination of a CT and a transformer, is mainly used for industrial customers, factories, buildings, etc. Maximum demand power meter by combination of instrument transformer (PT) converting high voltage to low voltage and instrument current transformer (CT) converting high current to low current for accurate calculation and payment of electricity bill It is used as an electric device to operate correctly.

In particular, the three-phase instrument transformer is composed of two or three instrument current transformers and two or three instrument transformers, and is mainly used as a transformer for measuring the amount of power supplied in combination with an integrated power meter.

Instrument current transformers are instrument transformers that convert certain current values into proportional current values. In general, the rated input current of common instruments and protective relays is 5 A, but the rated input current of digital relays, which have been developed and spread in recent years, is manufactured to be 1 A. As it is impossible to measure large current directly, it is a transformer that can measure instrument by lowering current to a certain ratio.

In addition, the instrument transformer is usually used for the use of a transformer having a secondary side of 110 [V] because it is dangerous to measure a high voltage directly by a voltmeter and is very economical in view of the voltmeter insulation. The types of instrument transformers used in this way can be broadly classified into dry, oil and gas.

On the other hand, the instrument transformer has a standard set up for manufacturing and testing like other electric products, for example, the Korean standard KS and the International Electrotechnical IEC (International Electrotechnical Comission). Domestic electrical appliances are covered by IEC for KS applications and for international exports.

However, with the development and internationalization of the times, not only KS is naturally changing to the same standard as IEC, but also the IEC standard is gradually upgraded, and corresponding products are competitive in technology, price, and size. The product was forced to be developed.

On the other hand, the partial discharge test is an important factor for discriminating the durability (life) of instrument transformers, and is performed on instrument transformers having a maximum voltage of 6.9 kV or more.

In particular, for inflow instrument transformers, due to the very severe test that the partial discharge amount should be measured at 10 pC (10 -12 coulomb) or less at a voltage of 1.2 times the maximum circuit voltage of the equipment, A special method is required to prevent partial discharge of bushings consisting of insulators and conductors, as well as transformer windings inside the tank of the transformer.

1 is a cross-sectional view and a partially enlarged view of a transformer for a bushing type oil insulation instrument according to the prior art.

Figure 2 is a simulation result showing the electric field distribution in the bushing in the transformer for the bushing type oil insulation instrument according to the prior art.

Referring to Figures 1 and 2 will be described the operation of the bushing-type oil insulation gauge transformer according to the prior art.

In general, the bushing type oil insulating instrument transformer contains a bushing 20, a transformer winding body 30, and an insulating oil 40 having a structure in which a high-voltage conductor 10 penetrates into a porcelain insulator 25. With an enclosure 50.

At this time, the plurality of insulator bushings 20 are fixed to the enclosure upper plate 55 formed of the iron tank, and the high voltage to be introduced is supplied to the transformer winding body 30 disposed inside the enclosure 50. .

In this structure, the insulator fixing bracket 60 and the rubber packings 70 and 75 are provided to fix the insulator 25. As shown in FIG. 2, the insulator fixing bracket 60 is in contact with the insulator 25. An electric field is concentrated around the insulator through-hole B through which the insulator 25 penetrates the portion A and the enclosure upper plate 55, causing partial discharge.

In particular, a portion where the enclosure 50 where the electric field is concentrated and the bushing 20 formed of the insulator 25 intersect is insulated by air, and the local electric field concentration is caused by the difference in dielectric constant between the insulator 25 and the air. The phenomenon is remarkable, and the potential hardness in the vicinity thereof becomes more than the corona critical voltage, causing severe corona discharge, that is, partial discharge.

When the partial discharge test is performed on the transformer for the bushing type oil insulation instrument according to the prior art, the most influential factor is the electric field concentration phenomenon around the high pressure bushing 20.

This is insulated around the bushing 20 made of insulator, and the transformer winding body 30 in the enclosure 50 maintains insulation with the insulating oil 40 filled therein, so that the insulating oil having excellent insulation performance ( This is because the surroundings of the bushing 20 are relatively insulated with a complex structure of air and enamel insulator, which are relatively vulnerable to insulation, so that partial discharge is easily generated around the bushing 20.

Therefore, in the outdoor type bushing oil insulation instrument transformer, the electric field concentration around the bushing 20 is alleviated and partial discharge does not occur, thereby satisfying the IEC standard, preventing insulation breakdown, and extending the service life. Development was needed.

An object of the present invention is to improve the structure of the bushing and bushing surroundings of the insulator, such as to alleviate the electric field concentration phenomenon of a certain portion and to remove the remaining air layer in the transformer for the outdoor bushing type oil insulation instrument for excellent partial discharge characteristics To provide a transformer for a partial discharge-proof bushing oil insulation instrument.

In addition, partial discharge prevention bushing type oil with excellent partial discharge characteristics by preventing corona discharge due to electric field concentration phenomenon occurring around the bushing in a simple process from the outside of the insulator while maintaining the structure and working process of the existing insulator that has already been molded. To provide a transformer for an insulation instrument.

The transformer for the partial discharge prevention bushing type oil insulation instrument of the present invention for achieving the above object is fixed to the upper plate of the enclosure to insulate the coil inside the enclosure and the enclosure; A high voltage conductor passing through the insulator to transmit a high voltage to the coil; An insulator fixing bracket for fixing the lowermost wing of the insulator to the upper case of the enclosure; And a packing part packed in a region between the lowermost wing of the insulator and the insulator fixing bracket and a region between the lowermost wing of the insulator and the upper plate of the enclosure to relieve electric field concentration due to the high voltage.

An insulating film attached to a surface of the lowermost wing of the insulator to insulate the electric field concentration of the high voltage; And a semiconductive packing attached to a surface of the insulating film to relax the electric field concentration and to remove an air layer remaining at an interface between the insulating film and the upper surface of the enclosure.

The insulator fixing bracket of the partial discharge prevention bushing type oil insulation gauge transformer of the present invention for achieving the above object is characterized in that the lower wing of the insulator is fixed to the upper plate by the bolt.

In order to achieve the above object, the insulating film of the partial discharge preventing bushing type oil insulating instrument transformer of the present invention is characterized in that the material can be solidified after molding.

The transformer for the partial discharge prevention bushing type oil insulation instrument of the present invention for achieving the above object is fixed to the upper plate of the enclosure to insulate the coil inside the enclosure and the enclosure; A high voltage conductor passing through the insulator to transmit a high voltage to the coil; An insulator fixing bracket for fixing the lowermost wing of the insulator to the upper case of the enclosure; And a shield part surrounding the insulator at a predetermined position outer surface between the wings of the insulator and reducing the electric field concentration of the high voltage.

The shield part of the transformer for partial discharge prevention bushing type oil insulation instrument of the present invention for achieving the above object is a shield forming a set of the semi-circular conductor of the belt type having a fastener at both ends to form a circle; And an insulator coating the surface of the shield.

The predetermined position of the transformer for partial discharge prevention bushing type oil insulation instrument of the present invention for achieving the above object is a position closer to the high voltage conductor than the distance between the insulator fixing bracket and the insulated through hole and the high voltage conductor. do.

The shield of the partial discharge prevention bushing type oil insulation gauge transformer of the present invention for achieving the above object is characterized by forming a circle through the fastening bolts.

The insulator of the partial discharge prevention bushing type oil insulation gauge transformer of the present invention for achieving the above object is characterized in that the material having elasticity.

The insulator fixing bracket of the partial discharge prevention bushing type oil insulation gauge transformer of the present invention for achieving the above object is characterized in that the insulator is fixed to the upper plate through the bolt.

According to the present invention, partial discharge is prevented at a specific portion of the bushing oil insulating instrument transformer, and the buffer surface and airtightness of the insulator surface are maintained to satisfy the IEC standard.

In addition, it is possible to develop high-performance products with an extended service life, and greatly simplify the work process to improve productivity.

1 is a cross-sectional view and a partially enlarged view of a transformer for a bushing type oil insulation instrument according to the prior art.
Figure 2 is a simulation result showing the electric field distribution in the bushing in the transformer for the bushing type oil insulation instrument according to the prior art.
3 is a cross-sectional view and a partially enlarged view of a transformer for partial discharge preventing bushing type oil insulation instrument according to an embodiment of the present invention.
4 is a simulation result showing the electric field distribution in the bushing in the transformer for the partial discharge prevention bushing type oil insulation instrument in an embodiment of the present invention.
5 is a cross-sectional view and a partially enlarged view of a partial discharge preventing bushing type oil insulating instrument transformer according to another embodiment of the present invention.
6 is a simulation result showing the electric field distribution in the bushing in the transformer for the partial discharge prevention bushing type oil insulation instrument according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the partial discharge prevention bushing oil insulating instrument transformer according to the present invention.

3 is a cross-sectional view and a partially enlarged view of a transformer for partial discharge preventing bushing type oil insulation instrument according to an embodiment of the present invention, the high-voltage conductor 10, the bushing 20, the insulator 25, the transformer winding body 30 , Insulating oil 40, air 45, enclosure 50, enclosure top plate 55, insulator fixing bracket 60 and packing portion, the packing portion insulating film 100, 150 and semiconductive packing 200, 250).

4 is a simulation result showing the electric field distribution in the bushing in the transformer for the partial discharge prevention bushing type oil insulation instrument in an embodiment of the present invention.

Referring to Figure 3 when explaining the function of each component of the transformer for the partial discharge prevention bushing type oil insulation instrument according to an embodiment of the present invention.

The high voltage conductor 10 receives a high voltage through the bushing 20 fixed to the upper plate 55 of the enclosure and passes the inside of the insulator 25 to transmit the high voltage to the transformer winding body 30.

The insulator fixing bracket 60 fixes the lowermost wing positioned at the lowermost of the wings of the insulator 25 to the enclosure upper plate 55 through bolting or the like.

The packing part is composed of insulating films 100 and 150 and semiconductive packings 200 and 250 so that the region A between the lowermost wing of the insulator 25 and the insulator fixing bracket 60 and the lower wing of the insulator 25 and the enclosure upper plate Area (A) between the lower wing of the insulator 25 and the insulator fixing bracket 60 which are packed in the area B between 55 to maintain buffering and airtightness and that the high voltage conductor 10 transmits a high voltage. And the electric field concentration phenomenon of the area B between the lowermost wing of the insulator 25 and the upper case 55 of the enclosure.

That is, the packing part is attached to the lowermost wing surface of the insulator 25 to which the insulating films 100 and 150 are fixed to insulate a high voltage electric field concentration, and the semiconductive packings 200 and 250 are attached to the surfaces of the insulating films 100 and 150. Adheres to reduce electric field concentration and removes air layers remaining at the interface between the regions B between the insulating films 100 and 150 and the upper case 55 of the enclosure.

Referring to Figure 3 and 4 will be described the operation of the transformer for the partial discharge prevention bushing type oil insulation gauge according to an embodiment of the present invention.

In the process of transmitting a high voltage through the insulator 25 to the transformer winding body 30 through the high voltage conductor 10, the packing part is the region A and the insulator between the lowermost wing of the insulator 25 and the insulator fixing bracket 60. It serves as a kind of shield to alleviate the electric field concentration phenomenon of the area B between the lowermost wing of (25) and the upper case 55 of the enclosure.

That is, the area where the electric field concentration phenomenon occurs in the area A between the lowermost wing of the insulator 25 and the insulator fixing bracket 60 and the area B between the lower wing of the insulator 25 and the upper box 55 of the insulator 25 occurs. Applying a semi-conductive composition to the liquid and attaching a shield to the insulating oil or insulator filled in the enclosure 50 to alleviate the concentration of the electric field, which is a limitation that cannot be achieved after the molding of the transformer is completed. There was.

However, the transformer for the partial discharge prevention bushing type oil insulation gauge according to an embodiment of the present invention may pack the packing part between the wings fixed to the upper case 55 of the solid insulator 25 part which has already been molded.

As shown in FIG. 4, the electric field distribution of the region A between the lowermost wing of the insulator 25 and the insulator fixing bracket 60 and the region B between the lowermost wing of the insulator 25 and the upper enclosure 55 is shown in FIG. Compared to the electric field distribution in the same area (A, B), it can be seen that the electric field concentration phenomenon is alleviated in the transformer for the bushing type oil insulation instrument according to the related art shown in FIG. 2.

As a result, the transformer for the partial discharge prevention bushing type oil insulation instrument according to an embodiment of the present invention not only prevents partial discharge, but also the insulator 25, the insulating film 100 and 150, and the semiconductive packing 200, in which an electric field is concentrated. While removing the fine air layer remaining at the interface between the 250), the packing portion is adhered to the surface of the insulator 25 to maintain the buffer and airtightness.

To this end, the insulating film 100, 150 is preferably a material that can be solidified after molding, such as room temperature epoxy or cured silicone, the semi-conductive packing (200, 250) is suitable, such as rubber for the buffering role and ease of operation when fixed It is preferable that it is a material which has elasticity.

5 is a cross-sectional view and a partially enlarged view of the transformer for the partial discharge prevention bushing type oil insulation instrument according to another embodiment of the present invention, the high voltage conductor 10, the bushing 20, the insulator 25, the transformer winding body 30 , Insulating oil 40, air 45, enclosure 50, enclosure top plate 55, insulator fixing bracket 60, and a shield portion, and the shield portion includes shield 300 and insulator 400.

FIG. 6 is a plan view (a) and a cross-sectional view (b) of a shield part of a transformer for a partial discharge preventing bushing type oil insulation instrument according to another embodiment of the present invention shown in FIG. 300 ') and an insulator 400.

7 is a simulation result showing the electric field distribution in the bushing in the transformer for the partial discharge prevention bushing type oil insulation instrument according to another embodiment of the present invention.

Referring to Figures 5 and 6 will be described the function of each component of the transformer for the partial discharge prevention bushing oil insulation instrument according to another embodiment of the present invention.

The high voltage conductor 10 receives the high voltage by fixing the insulator 25 to the upper plate 55 of the enclosure and passes the inside of the insulator 25 to transmit the high voltage to the transformer winding body 30.

The insulator fixing bracket 60 fixes the lowermost wing positioned at the lowermost of the wings of the insulator 25 to the enclosure upper plate 55 through bolting or the like.

The shield part is composed of the shield 300 and the insulator 400, and the bolt 25 is fastened after surrounding the insulator 25 on the outer surface of the insulator 25 at a predetermined position, so that the high voltage conductor 10 transmits the high voltage. The localization of the electric field generated locally in the region A between the lowermost wing of the insulator fixing bracket 60 and the region B between the lowermost wing of the insulator 25 and the upper case 55 of the insulator 25 is alleviated.

As shown in FIG. 6, the shields 300 and 300 ′ are formed of a belt-type semicircular conductor belt part 320 and two fastening parts 340 having fasteners 322 and 324 formed at both ends thereof to form a circle. The fastening portion 340 abuts and is fastened to the fasteners 322 and 324 with bolts to form a set, and the insulator 400 coats the surface of the belt portion 320 of the shield.

Referring to Figures 5 to 7 will be described the operation of the transformer for the partial discharge prevention bushing oil insulation gauge according to another embodiment of the present invention.

In the process of transmitting a high voltage through the insulator 25 to the transformer winding body 30 through the high voltage conductor 10, the shield part includes the region A and insulator between the lowermost wing of the insulator 25 and the insulator fixing bracket 60. The localization of the electric field concentration in the region B between the lowermost wing of 25 and the upper case 55 of the enclosure is alleviated to prevent local corona discharge.

That is, the shield portion is bolted after the semicircular shield portion surrounds the insulator 25 at a predetermined position outer surface between the wings of the insulator 25 fixed to the upper box 55 of the insulator 25 and the insulator fixing bracket The phenomenon in which an electric field is concentrated locally in the region B between the lower region of the inter-region A and the insulator 25 and the enclosure upper plate 55 is alleviated.

At this time, the predetermined position is the distance between the insulator fixing bracket 60 and the high voltage conductor 10 and the insulated through hole and the high voltage conductor 10 in order to induce the electric field to be concentrated in the shield and to significantly lower the threshold voltage at which the partial discharge starts. It is preferable to be closer to the high voltage conductor 10 than to the distance with.

In addition, the shield 300, 300 'is preferably a material having a suitable elasticity, such as silicon, because it is necessary to remove the fine air layer that may be present at the interface between the insulator 25 and the conductor in the process of tightening and shrinking by the bolt.

As shown in FIG. 7, the electric field distribution of the region A between the lowermost wing of the insulator 25 and the insulator fixing bracket 60 and the region B between the lowermost wing of the insulator 25 and the upper enclosure 55 is shown in FIG. Compared to the electric field distribution in the same area (A, B), it can be seen that the electric field concentration phenomenon is alleviated in the transformer for the bushing type oil insulation instrument according to the related art shown in FIG. 2.

As a result, the transformer for the partial discharge prevention bushing type oil insulation gauge according to another embodiment of the present invention not only prevents partial discharge, but also maintains the structure and work process of the existing insulator 25, which has already been molded. For example, even in the case of the region B, the cover plate 55 needs to be simply fastened to a predetermined position outside the insulator 25 by a bolt, thereby greatly simplifying the work process and improving productivity.

As described above, the transformer for the partial discharge prevention bushing type oil insulated gauge according to the embodiment of the present invention can alleviate the electric field concentration phenomenon of a specific part in the transformer for the bushing type oil insulated gauge for outdoor use and remove the fine air layer that may remain. Partial discharge protection Bushing-type oil-insulated instrument transformers are provided to prevent partial discharge in certain areas, while maintaining the cushioning and airtightness of the insulator surface to meet IEC standards.

In addition, the partial discharge prevention bushing type oil insulation gauge transformer according to another embodiment of the present invention prevents partial discharge that can be fastened in a simple manner from the outside of the insulator while maintaining the structure and work process of the existing insulator already molded. By providing a transformer for the bushing oil insulation instrument, it is possible to develop a high-performance product with an extended service life, and greatly simplify the work process to improve productivity.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the present invention can be changed.

In addition, it will be understood that each component of the present invention may be manufactured integrally or separately, and may be variously modified and changed by omitting some components according to the use form.

10: high voltage conductor
20: Bushing
25: Insulator
30: Transformer Period
40: Insulation oil
45: by air
50: enclosure
55: enclosure top
60: insulator fixing bracket
100, 150: transformer body
200, 250: Semiconductive Packing

Claims (10)

An insulator fixed to the upper plate of the enclosure to insulate the coil from the inside of the enclosure;
A high voltage conductor passing through the insulator to transmit a high voltage to the coil;
An insulator fixing bracket for fixing the lowermost wing of the insulator to the upper case of the enclosure; And
A packing part packed in an area between the lowermost wing of the insulator and the insulator fixing bracket and an area between the lower wing of the insulator and the upper plate of the enclosure to reduce electric field concentration due to the high voltage;
And a control unit
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
The method of claim 1,
The packing
An insulating film attached to a surface of the lowermost wing of the insulator to insulate the high voltage electric field concentration; And
A semiconductive packing attached to a surface of the insulating film to relax the electric field concentration and to remove an air layer remaining at an interface between the insulating film and the upper surface of the enclosure;
And a control unit
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
The method of claim 1,
The insulator fixing bracket
The lower wing of the insulator is characterized in that by fixing the bolt to the upper plate of the enclosure,
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
3. The method of claim 2,
The insulating film is
Characterized in that the material can be solidified after molding,
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
An insulator fixed to the upper plate of the enclosure to insulate the coil from the inside of the enclosure;
A high voltage conductor passing through the insulator to transmit a high voltage to the coil;
An insulator fixing bracket for fixing the lowermost wing of the insulator to the upper case of the enclosure; And
A shield portion surrounding the insulator at a predetermined outer surface between the wings of the insulated insulator and relieving the electric field concentration of the high voltage;
And a control unit
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
6. The method of claim 5,
The shield part
A shield in which a semicircular conductor of a belt type having fasteners at both ends abuts to form a circle; And
An insulator coating the surface of the shield;
And a control unit
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
6. The method of claim 5,
The constant position is
And a position closer to the high voltage conductor than the distance between the insulator fixing bracket and the insulated through hole and the high voltage conductor.
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
6. The method of claim 5,
The shield
To form a circle through the fastening bolt to the fastener,
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
6. The method of claim 5,
The insulator is
It is a material having elasticity,
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
6. The method of claim 5,
The insulator fixing bracket
Characterized in that the insulator is fixed to the upper plate through the bolts,
Transformer for bushing type oil-insulated instruments to prevent partial discharge.
KR1020120081469A 2012-07-25 2012-07-25 A bushing-type transformer for oil insulation instrument preventing partial discharge KR20140014732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120081469A KR20140014732A (en) 2012-07-25 2012-07-25 A bushing-type transformer for oil insulation instrument preventing partial discharge

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Application Number Priority Date Filing Date Title
KR1020120081469A KR20140014732A (en) 2012-07-25 2012-07-25 A bushing-type transformer for oil insulation instrument preventing partial discharge

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KR20140014732A true KR20140014732A (en) 2014-02-06

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104064292A (en) * 2014-06-26 2014-09-24 定州唐北绝缘子有限公司 Suspension insulator and manufacturing method of component of suspension insulator
CN107626455A (en) * 2017-10-30 2018-01-26 佛山市南海九洲普惠风机有限公司 A kind of electric field structure of high insulativity
CN109613406A (en) * 2018-12-29 2019-04-12 沈阳工业大学 A kind of experimental rig and method of disc insulator edge flashing electric discharge observation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104064292A (en) * 2014-06-26 2014-09-24 定州唐北绝缘子有限公司 Suspension insulator and manufacturing method of component of suspension insulator
CN107626455A (en) * 2017-10-30 2018-01-26 佛山市南海九洲普惠风机有限公司 A kind of electric field structure of high insulativity
CN107626455B (en) * 2017-10-30 2024-03-19 佛山市南海九洲普惠风机有限公司 High-insulation electric field structure
CN109613406A (en) * 2018-12-29 2019-04-12 沈阳工业大学 A kind of experimental rig and method of disc insulator edge flashing electric discharge observation
CN109613406B (en) * 2018-12-29 2023-10-27 沈阳工业大学 Test device and method for observing surface flashover discharge of basin-type insulator

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