KR101661138B1 - Apparatus for reducing vibration of transformers - Google Patents

Apparatus for reducing vibration of transformers Download PDF

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Publication number
KR101661138B1
KR101661138B1 KR1020160075713A KR20160075713A KR101661138B1 KR 101661138 B1 KR101661138 B1 KR 101661138B1 KR 1020160075713 A KR1020160075713 A KR 1020160075713A KR 20160075713 A KR20160075713 A KR 20160075713A KR 101661138 B1 KR101661138 B1 KR 101661138B1
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KR
South Korea
Prior art keywords
transformer
pad
flange
bottom plate
support plate
Prior art date
Application number
KR1020160075713A
Other languages
Korean (ko)
Inventor
이웅배
Original Assignee
(주)천도건축사사무소
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Priority to KR1020160075713A priority Critical patent/KR101661138B1/en
Application granted granted Critical
Publication of KR101661138B1 publication Critical patent/KR101661138B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
    • F16F7/116—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted on metal springs
    • 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
    • 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
    • H01F27/33—Arrangements for noise damping

Abstract

The present invention relates to a vibration-damping support device for a substation transformer, which minimizes the vibration energy transferred from the transformer and minimizes the behavior of the transformer according to the behavior of the ground and easily checks the positional variation between the transformer and the vibration- The purpose is to be possible.
A vibration damping and holding device of a substation transformer according to the present invention is a box structure having a block mounting groove (11) opened at an upper portion thereof and embedded in the ground, a foundation box (10) embedded in the ground; A buffer block (20) having a plurality of pile grooves (21) opened toward the top and inserted into the block mounting grooves (11) of the foundation box (10); A bottom plate 31 which is rectangular in plan view and a file which is extended to the bottom of the bottom plate 31 and inserted into the pile grooves 21 of the buffer block 20, (30); A cushion pad (40) seated on the bottom plate (31) of the transformer support plate (30) and elastically supporting the transformer; Four lids (50) assembled around the bottom plate (31) of the transformer support plate (30) and wrapping the flange (2) formed at the bottom of the transformer on the top; A pad (60) installed between the cover (50) and the flange (2) of the transformer; And the transformer support plate 30 is connected to the bottom plate 31 of the transformer support plate 30 while passing through the cover 50, the pad, the flange 2 of the transformer and the buffer pad 40, A display bar 70 for indicating a change in position of the display unit; And a transparent observation cover 80 which is assembled to the cover 50 and enables the display bar 70 to be visible from the outside.

Description

[0001] APPARATUS FOR REDUCING VIBRATION OF TRANSFORMERS [0002]

The present invention minimizes the vibration energy transferred from the transformer 1 as well as minimizes the behavior of the transformer 1 according to the behavior of the ground and easily verifies the positional change between the transformer 1 and the vibration- To a vibration-damping support device of a substation transformer capable of quick maintenance.

A typical substation is a collection of facilities that are installed for the modification of voltage and current and the distribution of electric power in the process of sending electric power produced by a power plant to a demander through a transmission line and a distribution line.

Examples of facilities installed in such a substation include a transformer (1), a disconnector, a circuit breaker, an ancillary equipment, a lightning arrester, or an electric switchboard.

Although the transformer (1) of the substation is a key device for supplying electricity, complaints by the residents around the substation are frequent because of the characteristics that cause a lot of noise. Therefore, for a substation operator, development of techniques for reducing the vibration of the transformer 1 is a very important technique in terms of environmental noise reduction.

Conventionally, a substation transformer is installed on a floor of a foundation part, which is usually made of concrete, without a separate device, so that vibration from the transformer 1 or the transformer 1 is transmitted between the transformer 1 and the concrete foundation part do.

Therefore, when the vibration from the transformer 1 is transmitted to the base portion because no separate vibration reduction device is provided, the vibration is transmitted to the vicinity of the substation so that the shape destruction due to the vibration of the surrounding structure, Problems such as complaints caused by noise generation occurred. In addition, when vibrations generated in the base portion, for example, vibrations generated by automobile operation, vibrations generated by earthquake or the like are transmitted to the transformer 1, the transformer (1) 1), and the like.

Therefore, there is a demand for a vibration preventing technique that removes the vibration caused by the operation of the transformer 1 and the vibration from the ground that is transferred toward the transformer 1.

An anchor bolt for placing and fixing the transformer 1 on the ground is interposed between the transformer 1 and the ground on the lower end of the transformer 1. The earthquake and dustproof technique applied to the conventional transformer 1 will be described.

In the case of simple fastening by such an anchor bolt, vibration due to an earthquake is directly transmitted to the transformer 1, which may damage or damage the transformer 1.

Alternatively, a vibration-proof pad 60 for relieving the vibrations due to the ground is interposed between the anchor bolt and the ground so as to alleviate the vibration transmitted by the earthquake to the transformer 1 directly.

Patent Document No. 10-0749907 discloses a vibration-damping support structure for a large-sized transformer 1 for fixing a transformer 1 on a ground or a structure using a fixing means, wherein a bottom surface of the transformer 1 And rubber pads 60 designed to have a checkerboard-shaped rib and designed to have a natural frequency of 10 Hz or less are disposed so as to be slightly spaced from each other and to be in contact with the bottom surface of the transformer 1, The flange 2 is provided with a dustproof cap which is configured to be fixed to the ground by means of a fixing means in the form of wrapping the side surface of the lower fixing flange 2, wherein the dustproof cap is inserted into the lower fixing flange 2 The shock absorbing structure for a large-sized transformer (1), which is composed of an insertion groove to be received and a support member to be fastened by the fixing means, is capable of absorbing a certain degree of impact through the rubber pad (60) It is difficult to confirm the behavior of the transformer (1) or the ground because it is difficult to confirm that the position of the transformer (1) is changed due to the behavior of the ground. There is a disadvantage that a maintenance cost is required.

KR-B1-10-0749907

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to minimize the vibration energy transferred from the transformer 1 and minimize the behavior of the transformer 1 according to the behavior of the ground, The present invention has been made in view of the above problems, and it is an object of the present invention to provide a vibration-damping support apparatus for a substation transformer capable of promptly repairing changes in position between vibration-

        A vibration damping and holding device of a substation transformer according to the present invention is a box structure having a block mounting groove (11) opened at an upper portion thereof and embedded in the ground, a foundation box (10) embedded in the ground; A buffer block (20) having a plurality of pile grooves (21) opened toward the top and inserted into the block mounting grooves (11) of the foundation box (10); A bottom plate 31 which is rectangular in plan view and a file which is extended to the bottom of the bottom plate 31 and inserted into the pile grooves 21 of the buffer block 20, (30); A cushion pad (40) seated on the bottom plate (31) of the transformer support plate (30) and elastically supporting the transformer; Four lids (50) assembled around the bottom plate (31) of the transformer support plate (30) and wrapping the flange (2) formed at the bottom of the transformer on the top; A pad (60) installed between the cover (50) and the flange (2) of the transformer; And the transformer support plate 30 is connected to the bottom plate 31 of the transformer support plate 30 while passing through the cover 50, the pad, the flange 2 of the transformer and the buffer pad 40, A display bar 70 for indicating a change in position of the display unit; And a transparent observation cover (80) attached to the cover (50) and making the display bar (70) visible from the outside.

According to the vibration damping support apparatus of the substation transformer of the present invention, it is possible to buffer vibration energy in the lateral direction and the longitudinal direction through the buffer block 20 of the underground foundation box 10 and the buffer pad 40 at the bottom of the transformer It is possible to prevent the transformer from being damaged due to the operation vibration of the transformer and also to check the behavior of the transformer or the ground by checking the position of the indicator rod 70, And low-cost maintenance is possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a vibration damping support device of a substation transformer according to the present invention.
2 is an exploded perspective view of a vibration damping support device of a substation transformer according to the present invention.

The features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It must be interpreted in terms of meaning and concept.

Therefore, the embodiments shown in the specification of this disclosure 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. Therefore, It should be understood that various equivalents and modifications are possible.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

A base box 10 having a box structure with a block mounting groove 11 opened at the top thereof and embedded in the ground;

A buffer block (20) having a plurality of pile grooves (21) opened toward the top and inserted into the block mounting grooves (11) of the foundation box (10);

A bottom plate 31 which is rectangular in plan view and a file which is extended to the bottom of the bottom plate 31 and inserted into the pile grooves 21 of the buffer block 20, (30);

A cushion pad (40) seated on the bottom plate (31) of the transformer support plate (30) and elastically supporting the transformer;

Four lids (50) assembled around the bottom plate (31) of the transformer support plate (30) and wrapping the flange (2) formed at the bottom of the transformer on the top;

A pad (60) installed between the cover (50) and the flange (2) of the transformer;

The transformer is coupled to the bottom plate (31) of the transformer support plate (30) through the cover (50), the pad (60), the flange (2) of the transformer and the buffer pad (40) (70) indicating a change in the position of the display unit (30);

And a transparent observation cover (80) attached to the cover (50) and making the display bar (70) visible from the outside,

      In addition, an initial point is displayed on the observation cover 80, and the indicator rod 70 includes a laser irradiator for irradiating light at an initial point of the observation cover 80.

And a coil spring installed between the lid 50 and the flange 2 of the transformer to elastically support the flange 2 of the transformer.

1 and 2, the vibration damping support apparatus of a substation transformer according to the present invention includes a foundation box 10 buried in the ground, a cushion block 20 inserted into the foundation box 10, a cushion block 20 A cushioning pad 40 installed on the transformer supporting plate 30 for buffering and supporting the transformer 1 and a transformer supporting plate 30 for supporting the transformer 1 on the transformer supporting plate 30, A pad 50 between the lid 50 and the transformer 1 and a pad 60 provided between the lid 50 and the transformer 1 to prevent the transformer 1 from coming off. And an observation cover 80 for protecting the display rod 70 and the display rod 70 and observing the position of the display rod 70 from the outside.

The foundation box 10 is a box structure having a block mounting groove 11 which is made of concrete, iron or the like and has an open top, and is embedded in the ground below the ground on which the transformer 1 is installed.

The buffer block 20 is a hexahedral block made of an elastic material such as rubber and provided with four pile grooves 21 into which the pile 32 of the transformer support plate 30 is inserted, 11 and absorbs the vibration energy due to the ground motion by its own elastic force so as not to be transmitted to the transformer support plate 30 while absorbing the vibration energy transferred from the transformer support plate 30, To prevent the ground motion.

The transformer support plate 30 is composed of a bottom plate 31 and a pile 32, and is preferably made of iron.

The bottom plate 31 has a square shape in plan view and has an area capable of stably supporting the transformer 1, and four sides have a nut portion for fixing the lid 50.

The file 32 is assembled through bolting or the like to the bottom surface (four corners) of the bottom plate 31. The outer shape is not limited to the circular shape shown in the drawing, Respectively.

The buffer pad 40 is of a rectangular plate shape resting on the top surface of the bottom plate 31 of the transformer support plate 30 and is made of an elastic material such as rubber and elastically supports the transformer 1 mounted on the top.

The lid 50 is provided at each of the four sides of the bottom plate 31 of the transformer support plate 30 and includes a vertical connection portion 51 fixed to the bottom plate 31 through a bolt 53, And a lid portion 52 which extends laterally (at a right angle) from the upper end of the transformer 1 and covers the upper end of the flange 2 formed at the bottom of the transformer 1 to support the transformer 1.

The bottom plate 31 and the lid 50 of the transformer support plate 30 are large enough to secure a free space in which the flange 2 of the transformer 1 can move.

The flange 2 of the transformer 1 is disposed inside the lid 50 and the lateral movement of the transformer 1 is buffered between the vertical connection portion 51 and the flange 2 of the transformer 1 A coil spring 55 is mounted.

One or more of the coil springs 55 are fixed to the lid 50 and support the flange 2 at the four sides of the flange 2 to prevent damage due to sudden movement of the transformer 1.

The pad 60 is a plate made of an elastic material and is installed between the lid portion 52 of the lid 50 and the flange 2 of the transformer 1 and is filled with a lubricating film on the surface, Are allowed to move on the transformer support plate 30 by the behavior of the ground, that is, both the behavior of the transformer support plate 30 and the behavior of the transformer 1 are applied.

As another method, the pads 60 provided between the lid 50 and the transformer 1 and the pads 60 can be assembled such that the first and second pads 61 and 62 can move with respect to each other The first pad 61 provided on the bottom surface of the lid part 52 is fixed to the lid part 52 of the lid 50 by the transformer 1 while being fixed to the lid part 52 of the lid 50, The second pad 62 is fixed to the upper surface of the transformer 1 and the first and second pads 61 and 62 move together with the cover 50 and the transformer 1. [

The display rod 70 stands upright on the transformer support plate 30 and informs the change of the position of the transformer 1 and the transformer support plate 30. The bottom of the display rod 70 is screwed to the bottom plate 31 of the transformer support plate 30, And penetrates the flange 2 of the transformer 1 and the lid portion 52 of the pad 60 and the lid 50.

The through holes 41, 3, 61 and 54 are made to communicate with the cushion pad 40, the flange 2 of the transformer 1, the pad 60 and the lid portion 52 of the lid 50, All of the through holes 41, 3, 61 and 54 are larger than the diameter of the indicator bar 70 so that the flange 2 of the transformer 1 The through holes 3 formed in the through holes 3 are formed to be smaller in diameter than the other through holes 41 and 61 and 54 so that the bottom surface of the flange 2 of the transformer 1 is exposed to the outside through the observation cover 80 .

A scale may be displayed around the through hole 3 on the bottom surface of the flange 2 of the transformer 1. For example, when the transformer support plate 30 is moved by the behavior of the ground, It is possible to confirm the movement of the ground or the movement of the transformer 1 through the change of the scale.

The observation cover 80 is transparent and assembled to the lid part 52 of the lid 50 so as to confirm the display rod 70 from outside. The observation lid 70 is not limited to a hemisphere but may be a plate.

The present invention is characterized in that an initial point 81 is displayed on the observation cover 80 so as to more easily confirm the change of the position of the transformer by the display rod 70, A laser irradiator 71 for irradiating light to the light source 81 may be applied.

It is preferable that the initial point 81 is an attachment type that adheres to the light irradiated by the laser irradiator 71 at the initial stage of the installation of the transformer 1. [

The laser irradiator 71 irradiates a laser beam by irradiating a battery or the like with a power source, for example, by irradiating the laser once per hour through a timer or by remote control operation of an administrator.

When the transformer cable of the transformer 1 is grounded, the foundation box 10 or the like may be provided with a hole for wiring the transformer cable which is wired in the ground and connected to the transformer 1.

According to the vibration damping support apparatus of a substation transformer according to the present invention, the transformer 1 has a cushioning pad 40 and a pad 60 disposed on the lower and upper portions of the flange 2 and the transformer supporting plate 30 is connected to the transformer 1 So that the transformer 1 can move independently of the transformer support plate 30. In this way, the transformer 1 can be moved independently of the transformer support plate 30.

In the lateral movement of the ground due to the earthquake, the buffer block 20 moves transversely with the ground. In this process, the buffer block 20 absorbs lateral vibration energy by its own elasticity, That is, the behavior of the transformer support plate 30 is minimized and the buffer pad 40 absorbs longitudinal vibration energy to minimize the behavior of the transformer 1, and consequently the behavior of the transformer 1 in all directions is very high It is possible to stably protect the transformer 1.

When the transformer support plate 30 is released from the initial position together with the ground, the display rod 70 moves together with the transformer support plate 30 and the manager moves the position of the display rod 70 through the observation cover 80 The scale indicated by the display rod 70 at the time of inspection is compared with the scale indicated by the display rod 70 at the time of initial installation of the transformer 1, It is possible to confirm the behavior or the change of the position of the transformer 1, and therefore the transformer 1 or the vibration-damping support device of the transformer can be quickly repaired, thereby preventing a breakage accident in advance.

It is also possible to confirm the behavior of the transformer 1 or the supporting device by confirming the point indicated by the light irradiated from the laser irradiator 71 when the laser irradiator 71 and the initial point 81 are applied, If the light irradiated by the light source 71 indicates a different point without pointing to the initial point 81, it can be confirmed that there is a change in position between the transformer 1 and the anti-vibration support device of the transformer.

1: Transformer 2: Flange
3,41,54,61: Through hole 10: Foundation box
20: buffer block 30: transformer support plate
31: bottom plate 32: file
40: buffer pad 50: cover
51: vertical connection part 52:
60: pad 70:
71: laser irradiator 80: observation cover

Claims (3)

A base box 10 having a box structure with a block mounting groove 11 opened at an upper portion thereof and embedded in the ground;
A buffer block (20) having a plurality of pile grooves (21) opened toward the top and inserted into the block mounting grooves (11) of the foundation box (10);
A bottom plate 31 which is rectangular in plan view and a file which is extended to the bottom of the bottom plate 31 and inserted into the pile grooves 21 of the buffer block 20, (30);
A cushion pad (40) seated on the bottom plate (31) of the transformer support plate (30) and elastically supporting the transformer;
Four lids (50) assembled around the bottom plate (31) of the transformer support plate (30) and wrapping the flange (2) formed at the bottom of the transformer on the top;
A pad (60) installed between the cover (50) and the flange (2) of the transformer;
And the transformer support plate 30 is connected to the bottom plate 31 of the transformer support plate 30 while passing through the cover 50, the pad, the flange 2 of the transformer and the buffer pad 40, A display bar 70 for indicating a change in position of the display unit;
And a transparent observation cover (80) attached to the cover (50) and allowing the display bar (70) to be visible from the outside.
The method according to claim 1,
The pad 60 is connected to the transformer 1 and the lid 50 of the lid 50 while assembling the first and second pads 61 and 62 so that they can move with respect to each other The first pad 61 provided on the bottom surface of the lid part 52 is formed and the second pad 62 is fixed to the upper surface of the transformer 1, (61, 62) move together with the lid (50) and the transformer (1) to prevent damage to the transformer (1).
The method according to claim 1 or 2,
The flange 2 of the transformer 1 is disposed inside the lid 50 and the lateral movement of the transformer 1 is buffered between the vertical connection portion 51 and the flange 2 of the transformer 1 A coil spring 55 is mounted,
One or more of the coil springs 55 are fixed to the lid 50 and support the flange 2 at the four sides of the flange 2 to prevent damage due to the sudden movement of the transformer 1. [ Of a substation transformer.
KR1020160075713A 2016-06-17 2016-06-17 Apparatus for reducing vibration of transformers KR101661138B1 (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101823024B1 (en) 2017-11-30 2018-01-30 두양전기건설(주) Transformer fixing apparatus for electric power transformation with earthquake-proof function
CN107887119A (en) * 2017-10-18 2018-04-06 浙江西维亚进出口有限公司 Shock-absorbing support structure for transformer
CN108711489A (en) * 2018-05-13 2018-10-26 国网安徽省电力有限公司淮北供电公司 A kind of shockproof reinforced support device of for transformer
KR101923133B1 (en) * 2016-12-23 2018-11-28 효성중공업 주식회사 Vibration reduction apparatus for transformer
KR20200142814A (en) * 2019-06-13 2020-12-23 남영기전 주식회사 Vibration proof and soundproofing equipment for transformers
KR102245062B1 (en) * 2021-03-26 2021-04-28 주식회사 종합전기기술사사무소 Support system for preventing vibration of substation transformers
KR102355069B1 (en) 2021-09-24 2022-02-08 노영철 Providing method for distribution line monitoring system
KR20230130253A (en) 2022-03-03 2023-09-12 엘에스일렉트릭(주) Vibration damper and transformer include the same
KR20230130255A (en) 2022-03-03 2023-09-12 엘에스일렉트릭(주) Vibration damper and transformer include the same
KR20230130254A (en) 2022-03-03 2023-09-12 엘에스일렉트릭(주) Vibration damper and transformer include the same
KR102608837B1 (en) 2023-09-27 2023-12-01 금양테크 주식회사 Support apparatus for preventing vibration of substation transformers
CN117153544A (en) * 2023-10-27 2023-12-01 江苏源通电气有限公司 High stability dry-type transformer

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KR20060116357A (en) * 2005-05-09 2006-11-15 엘지전자 주식회사 Device for fixing the transformer
KR20070046467A (en) * 2005-10-31 2007-05-03 한국전력공사 Vibration reducing structure for large transformers
KR101459704B1 (en) * 2014-04-28 2014-11-12 티앤제이건설 주식회사 VIBRATION-PROOFINT SUSPENSION DEVICE FOR TRANSFORMER IN 765kV BELOW POWER PLANT OR SUBSTATION
KR101530347B1 (en) * 2015-01-26 2015-06-29 (유)전일기술단 Suspension device for transformer in substation

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KR20060116357A (en) * 2005-05-09 2006-11-15 엘지전자 주식회사 Device for fixing the transformer
KR20070046467A (en) * 2005-10-31 2007-05-03 한국전력공사 Vibration reducing structure for large transformers
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KR101530347B1 (en) * 2015-01-26 2015-06-29 (유)전일기술단 Suspension device for transformer in substation

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101923133B1 (en) * 2016-12-23 2018-11-28 효성중공업 주식회사 Vibration reduction apparatus for transformer
CN107887119A (en) * 2017-10-18 2018-04-06 浙江西维亚进出口有限公司 Shock-absorbing support structure for transformer
CN107887119B (en) * 2017-10-18 2024-03-29 东莞市鸿技电子有限公司 Damping support structure for transformer
KR101823024B1 (en) 2017-11-30 2018-01-30 두양전기건설(주) Transformer fixing apparatus for electric power transformation with earthquake-proof function
CN108711489B (en) * 2018-05-13 2023-10-31 国网安徽省电力有限公司淮北供电公司 Shockproof reinforcement supporting device for transformer
CN108711489A (en) * 2018-05-13 2018-10-26 国网安徽省电力有限公司淮北供电公司 A kind of shockproof reinforced support device of for transformer
KR20200142814A (en) * 2019-06-13 2020-12-23 남영기전 주식회사 Vibration proof and soundproofing equipment for transformers
KR102214469B1 (en) 2019-06-13 2021-02-09 남영기전 주식회사 Vibration proof and soundproofing equipment for transformers
KR102245062B1 (en) * 2021-03-26 2021-04-28 주식회사 종합전기기술사사무소 Support system for preventing vibration of substation transformers
KR102355069B1 (en) 2021-09-24 2022-02-08 노영철 Providing method for distribution line monitoring system
KR20230130253A (en) 2022-03-03 2023-09-12 엘에스일렉트릭(주) Vibration damper and transformer include the same
KR20230130254A (en) 2022-03-03 2023-09-12 엘에스일렉트릭(주) Vibration damper and transformer include the same
KR20230130255A (en) 2022-03-03 2023-09-12 엘에스일렉트릭(주) Vibration damper and transformer include the same
KR102608837B1 (en) 2023-09-27 2023-12-01 금양테크 주식회사 Support apparatus for preventing vibration of substation transformers
CN117153544A (en) * 2023-10-27 2023-12-01 江苏源通电气有限公司 High stability dry-type transformer
CN117153544B (en) * 2023-10-27 2023-12-26 江苏源通电气有限公司 High stability dry-type transformer

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