KR101559934B1 - Apparatus for transformer case - Google Patents

Apparatus for transformer case Download PDF

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Publication number
KR101559934B1
KR101559934B1 KR1020150070525A KR20150070525A KR101559934B1 KR 101559934 B1 KR101559934 B1 KR 101559934B1 KR 1020150070525 A KR1020150070525 A KR 1020150070525A KR 20150070525 A KR20150070525 A KR 20150070525A KR 101559934 B1 KR101559934 B1 KR 101559934B1
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KR
South Korea
Prior art keywords
plate
lamp
terminal port
housing
front plate
Prior art date
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KR1020150070525A
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Korean (ko)
Inventor
주태민
Original Assignee
주태민
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Application filed by 주태민 filed Critical 주태민
Priority to KR1020150070525A priority Critical patent/KR101559934B1/en
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Publication of KR101559934B1 publication Critical patent/KR101559934B1/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145Indicating the presence of current or voltage
    • G01R19/155Indicating the presence of voltage

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

The present invention relates to a transformer case and to a transformer case which accommodates a transformer converting input voltage into output voltage and outputting the output voltage. The transformer case comprises: a housing in which an iron core and a winding coil are positioned in a cylindrical inner space including a front plate having an opening portion formed, a rear plate opposite to the front face plate, one side plate, the other side plate, and a bottom plate, which connect the front and rear plates, wherein a ventilation opening is formed in at least one plate among the front plate, the rear plate, one side plate, the other side plate, and the bottom plate, and an opening portion is formed on the upside of the inner space; an upper plate which opens or closes the opening portion of the housing; a voltage display which displays voltage and is located on the front plate; an input terminal port which has multiple input terminals connected to a power input line; an output terminal port which has multiple output terminals connected to a power output line; and a terminal block in which the input terminal port and the output terminal port are provided, and which is inclined from the opening portion toward the inner space of the housing and has an acute angle slope within 90° with respect to the bottom plate.

Description

Apparatus for transformer case

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer case, in which a transformer for converting an input voltage into another output voltage and outputting the transformed output is housed.

Transformers, such as transmission ground transformers and distribution ground transformers, are generally bulky and generate a lot of heat during transmission and distribution. Accordingly, a cooling fin is formed around the transformer case, and the cooling oil flows into the inside of the transformer case, thereby quickly discharging the heat generated by the ground-type transformer.

Thus, the transformer includes a plurality of winding coils having mutual induction, an iron core wound with the winding coils to form a magnetic force, and a bushing for pulling out the terminals of the winding coils to the outside. The transformer is usually provided on an electric pole, So that it can transform and distribute it. Such a transformer is provided with a cylindrical case filled with insulating oil to cool the coil, the iron core, and the bushing while the transformed voltage is supplied and distributed.

However, in the conventional transformer case, a voltage indicator and a breaker are provided on the front plate, and an input terminal port and an output terminal port are provided on the rear plate. Therefore, it is troublesome for the operator to check the presence or absence of abnormality by connecting the input terminal and the output terminal to the input terminal port and the output terminal port of the rear plate respectively, and then come back and look at the voltage indicator on the front plate.

Also, since the input terminal port and the output terminal port are at an angle of 90 °, there is a problem that the wire connection is difficult and the bending of the wire is out of the allowable range. In addition, there is a problem that the top plate, the side plate, and the back plate must be unlocked to confirm the inside of the transformer. Also, since the inside of the transformer is dark, it is difficult to check the inside of the transformer. Further, there is a problem that heat is not discharged well because no separate ventilation hole or ventilation fan is formed. Also, since the voltage indicator is protruded on the front panel, it may be caught by other objects during transportation and be damaged.

Korean Patent No. 10-0971361

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transformer case capable of easily discharging internal transformer heat. Another object of the present invention is to connect a power input line and a power output line to a transformer case without bending. The present invention also provides a switching means for allowing the outside and inside of the transformer case to be viewed even in a dark place, and also provides a photographing control means according to a switching operation. The technical problem of the present invention is to facilitate the transportation of the transformer case.

An embodiment of the present invention is a method of manufacturing a semiconductor device, comprising: a tubular inner space having a front plate on which an opening is formed, a rear plate facing the front plate, one side plate connecting the front plate and the rear plate, Wherein at least one of the front plate, the rear plate, the one side plate, the other side plate, and the bottom plate has a ventilation hole and an opening is formed on the upper side of the inner space; An upper plate for opening and closing an opening of the housing; A voltage indicator provided on the front plate for displaying a voltage; An input terminal port provided with a plurality of input terminals to which power input lines are connected; An output terminal port provided with a plurality of output terminals to which power output lines are connected; And a terminal block provided with the input terminal port and the output terminal port and having an acute angle slope inclined with respect to the bottom plate by 90 ° from the opening of the housing to the inner space of the housing.

The transformer case may include a terminal block angle variable member for varying the inclination of the terminal block so that an angle between the terminal block and the bottom plate is varied.

The upper plate may be hinged to the housing and may be opened or closed through an opening of the housing by hinge rotation or may be opened or closed by a sliding door.

The transformer case may include a breaker provided on the front plate and capable of blocking electric power supplied from the power input line from being transmitted to the winding coil.

And a front panel protection guide panel having a square frame structure protruding from the edge of the front panel.

The transformer case includes a voltage indicator lamp capable of providing illumination to the voltage indicator; A terminal port lamp provided on the inner surface of the front plate for providing illumination to the input terminal port and the output terminal port; And an inner lamp provided on an inner surface of at least one of the front plate, the rear plate, the one side plate, and the other side plate to illuminate the inner space of the housing.

The transformer case may include a lamp switch receiving the switching input of the voltage indicator lamp, the terminal port lamp, and the internal lamp.

The lamp switch is implemented as a three-stage toggle switch, and turns on only one of the voltage indicator lamp, the terminal port lamp, and the internal lamp, and turns off the other remaining lamps. have.

Wherein the transformer case includes a camera assigned to each of the voltage indicator lamp, the terminal port lamp, and the internal lamp, wherein the voltage indicator lamp, the terminal port lamp, The camera is turned on to transmit the image to the central server, and the camera assigned to the lamp operated off from the voltage indicator lamp, the terminal port lamp, and the internal lamp is turned off. have.

The transformer case may include a ventilation fan provided on one of the one side plate, the other side plate, and the rear plate.

According to the embodiment of the present invention, since the voltage indicator, the input terminal port, and the output terminal port are provided on the front plate of the transformer, it is possible to check whether there is an abnormality immediately after connecting the input and output, And it is possible to reduce the inconvenience of confirming the abnormality by coming forward.

In addition, the present invention minimizes the bending of the wire when the input terminal port and the output terminal port are tilted by 45 degrees and is different from the conventional transformer case which is inclined by 90 degrees. It is easy to see and connect.

Further, according to the present invention, a lamp is mounted on the upper part of the input terminal port, the output terminal port, and the voltage indicator, so that it is possible to check whether there is an abnormality in a dark place or at night. In addition, the top of the case can be opened to facilitate tab switching, cleaning and heat discharge. The transformer case is also equipped with a lamp so that it can be clearly seen when switching the tap or checking for abnormality. Also, you can turn on the lamp and turn on the inside and the terminal side by putting three cascade switches on the battlefield, and you can turn it off when not needed.

Further, in the present invention, a voltage indicator or the like provided on the front plate may go inward to protect deposits during falling or packaging.

In addition, there is a disadvantage in that heat is often generated due to the characteristics of a transformer. In the present invention, four sides are a ventilation hole, and hot air rises upwardly. Thus, when the upper opening is opened, five sides can be realized as ventilation holes. Heat can be captured efficiently.

1 is an exploded view of a transformer case according to an embodiment of the present invention;
2 is a perspective view of a transformer case according to an embodiment of the present invention;
FIG. 3 is a view showing that the upper plate is fastened through a hinge and a hinge to open or close the opening of the housing according to the embodiment of the present invention.
FIG. 4 is a view illustrating that the top plate is realized as a sliding door according to an embodiment of the present invention, and horizontally moved in a sliding door manner to open or close the opening of the housing.
FIG. 5 is a side view showing a state in which a terminal block is formed on a front plate according to an embodiment of the present invention, and a terminal block is provided so that the terminal block can be inclined to an internal space of the case through an opening.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to explain the present invention in detail so that those skilled in the art can easily carry out the present invention. . Other objects, features, and operational advantages of the present invention, including its effects and advantages, will become more apparent from the description of the preferred embodiments. In the following description of the drawings, the same reference numerals are used to designate the same or similar components in different drawings, even if they are shown in different drawings.

FIG. 1 is an exploded view of a transformer case according to an embodiment of the present invention, and FIG. 2 is a perspective view of a transformer case according to an embodiment of the present invention.

The transformer case of the present invention comprises an iron core, a tubular enclosure 110 in which a winding coil wound around the iron core is located in an inner space, an upper plate 120, a voltage indicator 130, an input terminal port 141, A terminal port 142, a terminal block 140, a front panel protection guide panel 180, and a circuit breaker 150.

The housing 110 is a tubular shape having an opening on its upper side and formed with an opening, and may have various tubular shapes such as a cylinder, a rectangular tube, and a hexahedron. The housing 110 includes a front plate 111, a rear plate 112 opposed to the front plate 111, a side plate 113 connecting the front plate 111 and the rear plate 112, (114), and a lower plate (115). That is, a transformer composed of an iron core and a winding coil may be located in the inner space of the housing 110.

The present invention is characterized in that it includes a front plate 111, a rear plate 112, a side plate 113, another side plate 114, and a lower plate 115 The ventilation hole T is formed in at least one of the plates. So that the heat heated by the transformer can be discharged to the outside through the ventilation opening (T). When the upper plate 120 which opens and closes the opening formed on the upper side of the housing 110 is opened, the five sides serve as ventilation passages, so that the heat of the transformer can be efficiently discharged. The ventilation fan 170 may be provided on one of the one side plate 113, the other side plate 114, and the rear plate 112 to more efficiently perform the heat discharge. The heat of the inner space of the housing 110 can be efficiently discharged to the outside more efficiently by the operation of the ventilation fan 170.

On the other hand, an opening is formed on the upper side of the housing 110 so that the transformer disposed in the inner space of the housing 110 can be seen from the outside through the opening. The opening may be opened or closed by the upper plate 120, and may be opened or closed by a hinge or sliding method. 3, the upper separating plate 30 is separated from the upper plate 120, and the upper separating plate 30 is coupled to the enclosing body 110 through a hinge, The opening of the housing 110 can be opened or closed. 4, the upper separating plate 30, which is separated from the upper plate 120, is realized as a sliding door and horizontally moved in a sliding door manner to open or close the opening of the housing 110 . The upper separating plate 30 can be held by the user with the handle A. [

The upper plate 120 is formed of a transparent reinforced acrylic plate and a transparent plastic material so that the inner space of the enclosure 110 can be seen even though the upper plate 120 covers the opening of the enclosure 110 .

On the other hand, the front panel 111 of the housing 110 is provided with a voltage indicator 130 and a breaker 150. The voltage indicator 130 is provided on the front plate 111 and displays an input voltage and an output voltage. The circuit breaker 150 is provided on the front plate 111 and can block power supplied from the power input line from being transmitted to the winding coils.

The input terminal port 141 and the output terminal port 142 may be disposed on the terminal block 140 which is inclined inwardly of the inner space through an opening provided in the front plate 111 of the housing 110.

The input terminal port 141 is a terminal port provided on the front plate 111 and provided with a plurality of input terminals to which a power input line is connected. The output terminal port 142 is a terminal port provided on the front plate 111 and provided with a plurality of output terminals to which a power output line is connected. The toggle switch 160 controls the lamp.

The input power input through the input terminal port 141 is provided to the winding coil of the transformer and the output power that is transformed and output from the transformer can be provided to the outside through the output terminal port 142 via the power output line.

In the present invention, since the voltage indicator 130, the input terminal port 141, the output terminal port 142, and the breaker 150 are all disposed on the same front side, the working efficiency can be improved. The conventional transformer case has a voltage indicator 130 and a breaker 150 at the front and an input terminal port 141 and an output terminal port 142 at the rear. In contrast, the present invention is characterized in that a voltage indicator 130 and a breaker 150 are provided on the front face plate 111 and the input terminal port 141, the output terminal port 142, (Not shown). Therefore, the present invention enables the operator to check whether there is an abnormality in the front after connecting the input and output, thereby solving the troubles of the operator connecting the input and output from the rear and coming back to check the abnormality.

The voltage indicator 130, the input terminal port 141, the output terminal port 142, the toggle switch 160 and the breaker 150 are protected from protruding from the top plate 120, To be protected.

To this end, a front panel protection guide panel 180 having a rectangular frame structure protruding from the rim of the front panel is included. The front panel protection guide panel 180 includes a guide panel first frame 181 protruding from the upper end of the front plate, a guide panel second frame 182 protruding from one end of the front plate, A guide frame third frame 183 protruding from the end and a guide panel fourth frame 184 and 184 protruding from the lower end of the front plate.

The front panel protection guide panel 180 is protruded from the front panel 111 so that the voltage indicator 130, the input terminal port 141, the output terminal port 142, the lamp switch 160, (150) or the like may not protrude from the top plate (120).

Therefore, in the conventional transformer case, the voltage indicator 130, the input terminal port 141, the output terminal port 142, and the breaker 150 are protruded and are liable to be damaged during transportation or movement, The invention can solve this problem.

On the other hand, in the case of the conventional transformer case, since the input terminal and the output terminal are oriented at 90 degrees from the front plate 111, it is difficult to connect the power line (power input line and power output line) to the input terminal and the output terminal , The bent of the power line is close to 90 degrees even after the connection, so that there is a problem that the power line becomes unreachable. In order to solve such a problem, the present invention is characterized in that the front surface of the input terminal port 141 and the front surface of the output terminal port 142 have an acute angle slope of 90 [deg.] Or less with respect to the bottom plate 115, It is easy to connect to the city and minimizes the bending of power lines.

There are various ways that the front surface of the input terminal port 141 and the front surface of the output terminal port 142 have an acute angle slope of 90 ° or less with respect to the bottom plate 115, Each of the front surface of the terminal port 141 and the front surface of the output terminal port 142 is formed in a module shape so as to have an acute angle slope with respect to the bottom plate 115 within 90 [deg.].

In another method, the input terminal port 141 and the output terminal port 142 are provided on a separate terminal block 140, and then the inclination of the terminal block 140 is set to be an acute angle slope of 90 ° or less with respect to the bottom plate 115 . That is, the terminal block 140 is formed to be separated from the front plate 111 by forming an opening in the front plate 111 and tilting the inner space of the housing 110 through the opening . The input terminal port 141 and the output terminal port 142 are attached to the terminal block 140. The terminal block 140 is inclined to the inner space of the housing 110 from the opening of the terminal block 140, . 5, a separate angle variable member 145 may be provided to vary the inclination of the terminal block 140 so that the angle between the terminal block 140 and the bottom plate 115 varies.

It is preferable that the acute angle slope has a slope of 45 deg. A 45 ° slope is required to ensure that the power line does not bend and has a natural line shape, and it is also easy for the operator to connect the power line.

In the meantime, the present invention is equipped with a lamp near the voltage indicator 130, the input terminal port 141, and the output terminal port 142 so that the operator can easily confirm whether there is an abnormality in the dark place or at night. To this end, the transformer case includes a voltage indicator lamp 11 provided on the first frame 181 of the guide panel and capable of providing illumination to the voltage indicator, and a voltage indicator lamp 11 provided on the inner surface of the front plate, And a terminal port ramp 12,13 that can provide illumination to the light source 142.

The voltage indicator lamp 11 may be provided on the front panel 111 on the upper side of the voltage indicator 130 as shown in the figure. Alternatively, a voltage indicator lamp 11 may be provided on the bottom surface of the guide panel first frame 181 located above the voltage indicator 130.

An input terminal port lamp 12 provided on an inner surface of the front plate 111 for providing illumination toward the input terminal port 141 and an output terminal port lamp 120 for providing illumination toward the output terminal port 142 13 can be provided. As the lamp, various light sources such as LEDs can be used.

In addition, the inner lamp 14 is mounted inside the transformer case so that the inside of the transformer case can be easily seen, so that the transformer can be clearly seen when switching the tap or checking for abnormality. The inner lamp 14 may be provided on the inner surface of at least one of the front plate 111, the rear plate 112, the one side plate 113, and the other side plate 114 forming the inner space. Respectively. For reference, various light sources such as a lamp, a LED, and the like can be used here.

As described above, in the present invention, a plurality of lamps are provided in the transformer case. A lamp switch 160, which receives a control input from the user, may be provided on the front plate 111 or the terminal block 140 of the transformer case . The lamp switch 160 receives the switching input of the voltage indicator lamp 11, the terminal port lamps 12 and 13 and the internal lamp 14 on or off. For reference, the lamp switch 160 may be provided on the front plate 111.

The lamp switch 160 can be implemented with a three-stage toggle switch. The lamp switch 160 turns on only one lamp among the voltage indicator lamp 11, the terminal port lamps 12 and 13 and the internal lamp 14 and turns off the other remaining lamps Can be implemented. For example, when the three-stage toggle switch is placed in the first stage, only the voltage indicator lamp 11 is turned on to emit light, while the remaining terminal port lamps 12, 13 and the internal lamp 14 are turned off OFF) to prevent light emission. Likewise, when the three-stage toggle switch is positioned at the second stage, only the terminal port lamps 12 and 13 are turned on to emit light, and the remaining voltage indicator lamps 11 and internal lamps 14 are turned off So that the light emission can be prevented. Likewise, when the three-stage toggle switch is positioned at the third stage, only the internal lamp 14 is turned on to emit light, and the remaining voltage indicator lamps 11 and terminal port lamps 12 and 13 are turned off So that the light emission can be prevented. This is to light only the current area in which the worker is working with a single operation, and turn off the lamp in the remaining area.

On the other hand, the transformer case may be provided with a camera (not shown) allocated to each module of the voltage indicator lamp 11, the terminal port lamps 12 and 13, and the internal lamp 14. The camera assigned to the lamp which is turned on from the voltage indicator lamp 11, the terminal port lamps 12 and 13 and the internal lamp 14 is turned on And the camera assigned to the lamp operated in the OFF state among the voltage indicator lamp 11, the terminal port lamps 12 and 13 and the internal lamp 14 is turned off. The lamp ON operation means that the operator is working on the module, and therefore, the camera assigned to the lamp ON operation module is turned ON to photograph the module.

By photographing the work area of the worker in real time and transmitting it to the central server, the manager of the central server can confirm the received work image and transmit the work instructions to the worker in the field.

For reference, the fact that the camera is assigned to the voltage indicator lamp 11 can be realized such that a camera capable of taking a close-up picture of the voltage indicator 130 is provided in front of the voltage indicator 130, A camera facing the direction of the display unit 130 may be provided. In the same way, the cameras are assigned to the terminal port lamps 12 and 13 in such a manner that cameras capable of taking close-up pictures of the terminal ports can be provided apart from the front of the terminal ports, A camera can be provided. Similarly, when the camera is assigned to the internal lamp 14, a camera capable of photographing the internal space of the housing 110 can be provided on the inner surface of the top plate 120. [

The embodiments of the present invention described above are selected and presented in order to facilitate the understanding of those skilled in the art from a variety of possible examples. The technical idea of the present invention is not necessarily limited to or limited to these embodiments Various changes, modifications, and other equivalent embodiments are possible without departing from the spirit of the present invention.

110: enclosure
111: front plate
112: rear only
113: one side plate
114: other side plate
115:
120: Top plate
130: Voltage indicator
140: Terminal block
141: Input terminal port
142: Output terminal port
150: Breaker
160: Lamp switch
170: Fan
180: Front panel protection guide panel

Claims (10)

The iron core and the winding coils are placed in a cylindrical inner space having a front plate having an opening, a rear plate facing the front plate, a side plate connecting the front plate and the rear plate, another side plate, Wherein at least one of the front plate, the rear plate, the one side plate, the other side plate, and the bottom plate has a ventilation hole and an opening is formed on the upper side of the inner space;
An upper plate for opening and closing an opening of the housing;
A voltage indicator provided on the front plate for displaying a voltage;
An input terminal port provided with a plurality of input terminals to which power input lines are connected;
An output terminal port provided with a plurality of output terminals to which power output lines are connected;
A terminal block provided with the input terminal port and the output terminal port, the terminal block having an acute angle slope inclined with respect to the bottom plate by 90 ° from the opening of the housing to the inner space of the housing; And
And a circuit breaker provided on the front plate and capable of preventing power supplied from the power input line from being transmitted to the winding coil.
The transformer according to claim 1,
A terminal block angle variable member for changing a slope of the terminal block so that an angle between the terminal block and the bottom plate is varied;
. ≪ / RTI >
The method according to claim 1,
Wherein the top plate is hinged to the housing to open or close the opening of the housing by hinge rotation or to open or close the housing of the housing in a sliding door manner.
delete The method according to claim 1,
And a front plate protection guide panel having a rectangular frame structure protruding from a rim of the front plate.
The transformer according to claim 1,
A voltage indicator lamp capable of providing illumination to the voltage indicator;
A terminal port lamp provided on the inner surface of the front plate for providing illumination to the input terminal port and the output terminal port; And
An inner lamp provided on an inner surface of at least one of the front plate, the rear plate, the one side plate, and the other side plate for illuminating an inner space of the housing;
At least one transformer case.
The method of claim 6,
The transformer case includes a lamp switch receiving a switching input of the voltage indicator lamp, the terminal port lamp, and the internal lamp.
The method of claim 7,
Wherein the lamp switch is implemented as a three-stage toggle switch to turn ON only one of the voltage indicator lamp, the terminal port lamp, and the internal lamp and turn off the other remaining lamps case.
The method of claim 8,
Wherein the transformer case includes a camera assigned to each of the voltage indicator lamp, the terminal port lamp, and the internal lamp,
A terminal port lamp, and an internal lamp, and transmits the photographed image to a central server. The voltage indicator lamp, the terminal port lamp, and the internal lamp (OFF) the camera assigned to the lamp operated in the OFF state.
The transformer according to claim 1,
A ventilation fan provided on one of the one side plate, the other side plate, and the rear plate;
. ≪ / RTI >
KR1020150070525A 2015-05-20 2015-05-20 Apparatus for transformer case KR101559934B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101999311B1 (en) * 2018-09-12 2019-07-15 영훈전기(주) A transformer with improved workability
KR20200030386A (en) * 2018-09-12 2020-03-20 영훈이티에스(주) A distribution transformer with improved heat dissipation performance
CN112370667A (en) * 2020-11-23 2021-02-19 山东新华医疗器械股份有限公司 Medical accelerator upper computer and dosage system
CN113744962A (en) * 2021-08-24 2021-12-03 国网山东省电力公司龙口市供电公司 Three-port power electronic transformer
KR102539345B1 (en) * 2022-12-09 2023-06-05 한국전력공사 Protective device of transformer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200247637Y1 (en) 2001-06-23 2001-10-31 최현길 Terminal panel structure of trensformer for welding
KR100740913B1 (en) 2006-06-21 2007-07-19 신영중전기 주식회사 Pad mounted transformer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200247637Y1 (en) 2001-06-23 2001-10-31 최현길 Terminal panel structure of trensformer for welding
KR100740913B1 (en) 2006-06-21 2007-07-19 신영중전기 주식회사 Pad mounted transformer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101999311B1 (en) * 2018-09-12 2019-07-15 영훈전기(주) A transformer with improved workability
KR20200030386A (en) * 2018-09-12 2020-03-20 영훈이티에스(주) A distribution transformer with improved heat dissipation performance
KR102168078B1 (en) 2018-09-12 2020-10-20 영훈이티에스(주) A distribution transformer with improved heat dissipation performance
CN112370667A (en) * 2020-11-23 2021-02-19 山东新华医疗器械股份有限公司 Medical accelerator upper computer and dosage system
CN113744962A (en) * 2021-08-24 2021-12-03 国网山东省电力公司龙口市供电公司 Three-port power electronic transformer
CN113744962B (en) * 2021-08-24 2023-12-12 国网山东省电力公司烟台市福山区供电公司 Three-port power electronic transformer
KR102539345B1 (en) * 2022-12-09 2023-06-05 한국전력공사 Protective device of transformer
KR102675327B1 (en) 2022-12-09 2024-06-14 한국전력공사 Protective device of transformer
KR102675328B1 (en) 2022-12-09 2024-06-14 한국전력공사 Protective device of transformer

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