KR101674056B1 - potential transformer having separation type fuse - Google Patents

potential transformer having separation type fuse Download PDF

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Publication number
KR101674056B1
KR101674056B1 KR1020150041548A KR20150041548A KR101674056B1 KR 101674056 B1 KR101674056 B1 KR 101674056B1 KR 1020150041548 A KR1020150041548 A KR 1020150041548A KR 20150041548 A KR20150041548 A KR 20150041548A KR 101674056 B1 KR101674056 B1 KR 101674056B1
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KR
South Korea
Prior art keywords
transformer
fuse
meter
input terminal
iron core
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KR1020150041548A
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Korean (ko)
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KR20160114975A (en
Inventor
노관성
박영태
홍장수
백승용
윤병수
함영구
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주식회사 평일
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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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • 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)
  • Transformers For Measuring Instruments (AREA)
  • Fuses (AREA)

Abstract

Disclosed is a meter transformer with a detachable fuse.
The inner circumferential surface of packing (conductive rubber) is matched with the outer circumferential surface of a core used in a current transformer, a meter transformer, and a transformer transformer for a meter formed of an epoxy resin including an iron core, (SUS) which combines the iron cores, and the grounding is integrally formed with the conductive packing and the product holder. Thus, the current transformer, It is possible to minimize the partial discharge of the transformer for meters and the transformer for meters, thereby improving the reliability.

Figure R1020150041548

Description

[0001] The present invention relates to a transformer having a separable fuse,

The present invention relates to a transformer for a meter having a detachable fuse, and more particularly to a transformer for a meter including an iron core and formed of an epoxy resin, a transformer for a meter, an outer peripheral surface of a core used for a transformer for a meter, The inner circumferential surface of the packing (conductive rubber) coincides with each other to shape the outer circumferential surface of the packing in a circular shape to alleviate the concentration phenomenon of the electric field and to reduce the shrinkage rate generated upon curing of the resin, A transformer for a meter, a transformer for a meter, and a transformer for a meter having a separate fuse capable of improving reliability by minimizing partial discharge of a transformer for a meter, by constructing a ground integrally with a packing and a product cradle.

Generally, a potential transformer is a kind of transformer used to convert a high voltage into a voltage of a certain ratio to supply power to a voltmeter or a relay. The potential transformer includes a current transformer for converting a current, (MOF, Metering Out Fit) that converts the current and the current. The transforming ratio of this instrumental transformer is determined by the ratio of the turns.

In addition, since high line voltage is applied directly to the primary side of the transformer for meters, care must be taken when handling it. Since it is the same as the power transformer in the circuit configuration, if there is a short circuit between the secondary terminals, Is equipped with an automatic circuit breaker such as a fuse.

In Patent Document 1, a fixing plate is provided on the bottom surface of the side or bottom, and one input terminal is molded and fixed on the upper surface of the front. A fuse is inserted in the direction of the input terminal from the rear side to form one fuse tube cap, And the fuse is attached to the conductor of the input terminal by means of a fastening bolt. The primary winding is made of one piece, and the iron core is positioned in a direction perpendicular to the upper and lower sides of the primary winding by an iron core winding core A connector-type secondary terminal is provided at the lower part of the body, a neutral terminal for grounding is formed and fixed at the lower side of the rear part, and the input terminal side is formed and fixed so as to be able to connect the connecting agent, and the input terminal has two shapes of irregularities , The outside of the body is made of a metal plate, the input terminal side shield and the fuse insertion side shield are built in for the purpose of electric field relaxation, and the inside is formed of flame retardant synthetic resin The instrument transformer for the fuse to be fused integrally to the transformer is built internal disclosed.

In Patent Document 2, a fixing plate is provided on the bottom of the bottom surface, one input terminal is molded and fixed on the upper surface, one fuse support and two fuse holders are respectively mounted on the input terminals and the upper portion of the fuse support, And the primary winding is made up of one inside. The iron core is an iron core winding core, which is positioned in the direction perpendicular to the upper and lower sides of the primary winding. Two blockers are molded and fixed to the lower part of the body, There is disclosed a transformer for a meter in which a neutral terminal is molded and fixed, and a fuse is easily mounted.

Patent Document 3 discloses a transformer having a main body having an internal space, an input terminal portion formed on one side of the main body and configured to transmit a current supplied from the outside to the inside of the transformer, and an input terminal portion connected to the input terminal portion, A primary winding and an iron core with a carbon tape on the surface thereof and a secondary winding connected to the fuse and an insulating connection portion for transmitting a current passing through the fuse and an insulating connection portion for converting a high voltage into a low voltage, A transformer formed of a primary winding, a transformer formed around the input terminal portion and the insulating connection to shield the concentration of the electric field, and a discharge lamp formed to surround the fuse so as to prevent partial discharge, There is disclosed a transformer for a built-in fuse including a cylindrical fuse shield.

The prior art disclosed in the above-described Patent Documents 1 to 3 has a problem that the fuse is formed integrally with a transformer for meters, a transformer for meters, and a transformer for meters, thereby causing problems such as concentration of electric field in one place or occurrence of electric shock .

Korean Registered Patent No. 10-0453123 (Published on October 15, 2004) Korean Registered Patent No. 10-0444738 (Date of Publication: Oct. 16, 2004) Registered Utility Model No. 20-0443114 of the Republic of Korea (Announcement date Jan. 15, 2009)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an epoxy resin composition which prevents concentration of an electric field, alleviates an electric field and prevents an electric shock accident, Which is capable of preventing scattering of an internal configuration including a fuse.

According to an aspect of the present invention, there is provided a power supply apparatus comprising: a power input terminal for transmitting a high-voltage power supplied from the outside to the inside of a transformer for a meter; A primary winding, which is electrically connected to the power input terminal and flows from the power input terminal and flows at a high voltage; A secondary winding having a pair of the primary windings and inducing a low voltage; An iron core around which the primary winding and the secondary winding are wound; A body portion formed of an epoxy resin in a state where the primary winding, the secondary winding, and the iron core are inserted; And a fuse holder having a built-in fuse and being detachably coupled to the power input terminal.

In the present invention, the body portion is characterized in that an outer circumferential surface is formed into a curved surface corresponding to an outer circumferential surface of the primary winding, the secondary winding, and the iron core in order to prevent an electric field from being concentrated.

In the present invention, the body is characterized in that semiconductive paint is applied to the outer circumferential surface to alleviate the electric field.

In the present invention, the body portion is characterized in that a metal plate and a pair of metal covers are attached to the outer circumferential surface to be sealed with the outside.

The present invention is further characterized in that a fixing metal plate coupled to a side surface of the metal cover and fixed to another device is further provided.

In the present invention, the fuse holder has an elbow shape which is mechanically / electrically separated from the power input terminal.

In the present invention, the fuse holder is characterized in that the outer circumferential surface of the fuse holder is treated with semiconductive rubber to alleviate the electric field.

According to the present invention, it is possible to prevent the concentration of the electric field by forming the body with the epoxy resin into the curved surfaces corresponding to the shapes of the primary and secondary windings and the iron core in the state that the primary and secondary windings and the iron core are inserted. By applying semiconductive paint to the outer surface and treating the outer surface of the fuse holder with semiconductive rubber, it is possible to prevent electric field relaxation and electric shock. By sealing the outer surface of the body with metal plate and metal cover, And it is possible to prevent scattering of the internal constitution including the epoxy resin upon explosion by accident.

1 is a perspective view of a transformer for a meter having a detachable fuse according to an embodiment of the present invention.
FIG. 2 is a rear perspective view of a transformer for a meter having the detachable fuse of FIG. 1; FIG.
3 is a front view of the instrument transformer with the detachable fuse of FIG.
4 is an exploded perspective view of the instrument transformer with the separable fuse of FIG.
5 and 6 are cross-sectional views of a meter transformer with the separate fuse of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a transformer for a meter having a detachable fuse according to an embodiment of the present invention, FIG. 2 is a rear perspective view of a transformer for a meter having the detachable fuse of FIG. 1, FIG. 4 is an exploded perspective view of a transformer for a meter having a detachable fuse of FIG. 1, and FIGS. 5 and 6 are sectional views of a transformer for a meter having the detachable fuse of FIG.

1 to 6, a transformer for a meter having a separate fuse according to an embodiment of the present invention includes a transformer for a meter including first and second windings 21 and 22 and an iron core 30, The metal cover 61 and the metal covers 62 and 63 surrounding the body portion 40 and the fuse holder 50 ) And the like.

The instrument transformer includes primary and secondary windings 21 and 22 and an iron core 30 around which primary and secondary windings 21 and 22 are wound. The secondary winding 22 is electrically connected to the secondary input terminal 10 exposed to the outside of the body portion 40 and a part of the secondary winding 22 is electrically connected to the secondary terminal 41 exposed to the outside of the body portion 400 And the power input terminal 10 is electrically connected to a fuse, that is, a fuse holder 50. [

In other words, the power transformer includes a power input terminal 10 for electrically transmitting a high-voltage power supplied from the outside to the inside of the transformer for a meter, and a power input terminal 10 A secondary winding 22 in which a low voltage is induced and a pair of primary windings 21 and a primary winding 21 and a secondary winding 22, And the iron core 30 is wound.

The body portion 40 is formed of an epoxy resin in a state in which the primary winding 21, the secondary winding 22 and the iron core 30 are inserted. The fuse holder 50 has a built-in fuse and is mechanically / electrically separated from the power input terminal 10.

The outer peripheral surface of the body portion 40 is formed into a curved surface corresponding to the outer peripheral surface of the primary winding 21, the secondary winding 22 and the iron core 30 at the time of molding, thereby preventing the electric field from concentrating. The power input terminal 10 and the secondary terminal 41 are also inserted into the body portion 40 together with the primary winding 21, the secondary winding 22 and the iron core 30 at the time of forming the body portion 40 A part of which is exposed to the outside for connection to the outside.

In addition, the embodiment of the present invention can reduce the electric field generated in the transformer for meters by applying the semiconductive paint to the outer circumferential surface of the body portion 40.

The embodiment of the present invention is characterized in that a metal plate 61 such as AL or the like and a pair of metal covers 62 and 63 are attached to the outer circumferential surface of the body portion 40 so that the primary winding 21, It is possible to protect the body portion 40 integrally formed with the body 22 and the iron core 30 from the external impact and to prevent the primary winding 21, the secondary winding 22, And the body portion formed of the iron core 30 and the epoxy resin surrounding it can be prevented from scattering.

Further, the embodiment of the present invention is further provided with a fixing metal plate 64 which is coupled to the side surfaces of the metal covers 62 and 63 and fixed to other equipment, thereby fixing the instrument transformer to other equipment . Here, in order to fix the fixing metal plate 64 to the side surfaces of the metal covers 62 and 63, a plurality of metal plates 62 and 63 for screwing the fixing metal plate 64 to the side surfaces of the metal covers 62 and 63 Supports should be formed.

Further, the embodiment of the present invention may have an elbow shape in which the fuse holder 50 is mechanically / electrically separated and coupled to the power input terminal 10. The fuse holder 50 also includes a fixing bracket 51 and a support base 52 for fixing the fuse holder 50 to the upper portion of the instrument transformer or metal covers 62 and 63.

In the embodiment of the present invention, the outer circumferential surface of the fuse holder 50 is treated with the semiconductive rubber so as to alleviate the electric field generated by the instrument transformer as in the case where the semiconductive paint is applied to the outer circumferential surface of the body portion 40 .

In the above embodiment of the present invention, the separable fuse is applied to a transformer for a meter. However, the present invention is not limited to this, and it is of course also applicable to a transformer for a meter, a transformer for a meter, and the like.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

10: Power input terminal 21: Primary winding
22: secondary winding 30: iron core
40: Body part 41: Secondary terminal
50: Fuse holder 51: Fixing bracket
52: support base 61: metal plate
62, 63: metal cover 64: metal plate for fixing

Claims (7)

A power input terminal 10 for transmitting a high voltage power supplied from the outside to the inside of a transformer for a meter and a power input terminal 10 electrically connected to the power input terminal 10, A secondary winding 22 in which a low voltage is induced by being paired with the primary winding 21 and an iron core 22 wound around the primary winding 21 and the secondary winding 22, And a body portion (40) molded with an epoxy resin in a state where the primary winding (21), the secondary winding (22) and the iron core (30) And a fuse holder (50) for separating and coupling the fuse holder (10) to the fuse holder (10), the transformer comprising:
Wherein a metal plate (61) and a pair of metal covers (62) (63) are attached to the outer circumferential surface of the body part (40) and are sealed with the outside. delete delete delete The method according to claim 1,
And a fixing metal plate (64) coupled to a side surface of the metal cover (62) (63) and fixed to another device. delete delete
KR1020150041548A 2015-03-25 2015-03-25 potential transformer having separation type fuse KR101674056B1 (en)

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KR101674056B1 true KR101674056B1 (en) 2016-11-08

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Publication number Priority date Publication date Assignee Title
CN107146702A (en) * 2017-07-05 2017-09-08 河南森源电气股份有限公司 Voltage transformer and its spring and inserts attachment structure
CN107342152A (en) * 2017-08-25 2017-11-10 河南卓达电气有限公司 A kind of full cast-type combination transformer of phase three-wire three
CN107546018B (en) * 2017-10-13 2023-09-29 镇江市丹高电器有限公司 Three-phase combined type voltage transformer internal body with primary melting core
CN107799289A (en) * 2017-10-21 2018-03-13 吉韦龙 A kind of voltage transformer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200418708Y1 (en) 2006-03-27 2006-06-14 영화산업전기 주식회사 Voltage transformer for metering

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100444738B1 (en) * 2001-11-26 2004-08-16 김연수 meter transformer easy fuse fitting and plastic operation method thereof
KR100453123B1 (en) 2001-11-26 2004-10-15 김연수 meter transformer fitting fuse and plastic operation method thereof
KR200443114Y1 (en) * 2007-05-21 2009-01-15 영화산업전기 주식회사 Fused potential transformer for metering
KR101015135B1 (en) * 2008-08-20 2011-02-16 주식회사 평일 An elbow connector for transformer with fuse mounted inside

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200418708Y1 (en) 2006-03-27 2006-06-14 영화산업전기 주식회사 Voltage transformer for metering

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