KR101593148B1 - earthquake-proof panel board - Google Patents

earthquake-proof panel board Download PDF

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Publication number
KR101593148B1
KR101593148B1 KR1020150055422A KR20150055422A KR101593148B1 KR 101593148 B1 KR101593148 B1 KR 101593148B1 KR 1020150055422 A KR1020150055422 A KR 1020150055422A KR 20150055422 A KR20150055422 A KR 20150055422A KR 101593148 B1 KR101593148 B1 KR 101593148B1
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KR
South Korea
Prior art keywords
frame
earthquake
coil spring
spring
proof
Prior art date
Application number
KR1020150055422A
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Korean (ko)
Inventor
장필기
Original Assignee
신원중전기(주)
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Priority to KR1020150055422A priority Critical patent/KR101593148B1/en
Application granted granted Critical
Publication of KR101593148B1 publication Critical patent/KR101593148B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/54—Anti-seismic devices or installations
    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • F16F15/063—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs with bars or tubes used as torsional elements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Patch Boards (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The present invention relates to an earthquake-proof distribution board which comprises an earthquake-proof device at a lower part. The earthquake-proof distribution board of the present invention includes: a distribution board comprising distribution equipment and an enclosure embedded with the distribution equipment; a frame comprising a first frame which is attached and fixed to a bottom of the distribution board, and a second frame which is attached and fixed to an upper plane of a foundation where the distribution equipment is placed and can be variable as to the first frame; and an earthquake-proof buffering part comprising a variable joint which is formed with a strong material to connect points where the first frame and the second frame faces each other up and down, a coil spring elastically compressed between the first and the second frame by the weight of the distribution board, and a vibration attenuation unit for compressing an outer circumference of the coil spring. Vibration of earthquake delivered to the distribution board is absorbed actively by comprising an earthquake-proof buffering part and a horizontal buffering part, and resonance of the coil spring is prevented, and influence of the earthquake on the distribution board is minimized.

Description

Earthquake-proof panel board

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a seismic switchgear, and more particularly, to a seismic resistant switchgear that prevents resonance, which may possibly occur in a vibration absorption process, while absorbing vibration due to an earthquake.

The switchboard with high-priced electrical equipment is a device that supplies power to facilities that require electricity at factories and other facilities. Therefore, the switchgear should be kept as safe as possible for stable operation and preservation of equipment.

In addition, not only factories but also residential buildings including apartments are equipped with large automatic switchboards in accordance with the automation trend, so safe maintenance of the switchboards is required to ensure the safety of residents in disaster situations.

An earthquake is one of the most disastrous disasters that could cause the greatest damage to the switchboard during the expected disaster. Therefore, various techniques have been disclosed for the earthquake-resistant structure of the switchgear.

In particular, the damage caused by the earthquake is large due to the direct destruction of the earthquake, but it is known that the secondary damage, which is caused by the material and human loss caused by the shutdown of the facilities during the major period after the earthquake, is larger. The need to do is even greater.

However, most of the conventional techniques are focused on passive researches to prevent the disruption of the building itself, rather than actively removing the influence of the vibration caused by the earthquake, and actively absorbing the vibration of the earthquake There is a lack of research on means.

In addition, in the case of a spring provided for vibration absorption of an earthquake, a primary impact can be avoided due to a spring, but springs can be resonated at the same time due to an earthquake and vibration of an earthquake, Techniques can not find a technique for a switchgear with a structure that can prevent additional damage due to resonance.

Therefore, there is a need for a power transmission and distribution system capable of absorbing direct shock waves of an earthquake while also providing means for suppressing or preventing the effect of resonance which is generated in the absorption process of the shock wave and can cause another damage.

Patent Registration No. 10-1081571 (Registered on November 11, 2011)

SUMMARY OF THE INVENTION 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 a vibration damping device capable of absorbing both horizontal and vertical vibration transmitted to a switchboard due to an earthquake, An object of the present invention is to provide an earthquake-resistant power transmission and distribution system provided with a means by which resonance can be effectively prevented.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an earthquake-resistant switchboard comprising: A coil spring which is elastically compressed between the first frame and the second frame due to the load of the switchboard, and a coil spring which is elastically biased between the first frame and the second frame by a load of the switchboard, And vibration damping means for compressing the outer circumferential surface.

Preferably, the variable joint is disposed inside the coil spring, and is characterized by being two threaded rods respectively attached to the first and second frames, and a steel chain or universal joint connecting between the threaded rods.

And the vibration damping means is an elastic band for adjusting the resonance period for pressing the outer circumferential surface of the spring.

At this time, it is preferable that the elastic band is formed with one or more supporting pieces connecting the opposing points on the inner circumferential surface so that expansion of the elastic ring is suppressed.

The plurality of earthquake-proof buffer parts may be provided, and the height at which the elastic bands are coupled to the coil spring may be different for each of the plurality of earthquake-proof buffer parts.

And further preferably includes a horizontal vibration damping portion for vibration absorption between points where the first frame and the second frame are horizontally opposed to each other.

In this case, the horizontal buffer section includes two bolts attached to the first frame and the second frame, a coupling having a hole formed on both sides so that the interval between the two bolts is variable, And a machined spring which is coupled to an outer peripheral surface of the bolt and the coupling nut.

The earthquake-resistant switchboard of claim 1, wherein a spring cap is provided between the coil spring and the first or second frame to prevent an end portion of the coil spring from being caught between the coil spring and the first or second frame.

The present invention has the following effects.

First, the vibration of the earthquake transmitted to the switchboard is actively absorbed by the spring, so that the effect of the earthquake on the switchboard can be minimized.

Second, an elastic band is attached to the spring, so that the resonance period of the spring is adjustable, thereby preventing more damage due to the resonance of the spring.

Third, the variable joint which can change the distance of the both ends only within a certain range is installed inside the coil spring, which is an elastic body, to effectively block vibrations during the earthquake more than the conventional rod system, .

Fourthly, a horizontal buffering portion is provided to absorb vibration in the horizontal direction.

Fifth, the installation of the spring cap prevents the release of the spring, so that the vibration absorption by the spring is stably achieved.

Sixth, the vibration absorption can be maximized by providing the neoprene vibration pad.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing an earthquake-
Fig. 2 is a front view showing a horizontal buffer section in the present invention, Fig.
3 is an exploded perspective view showing the structure of a frame in the present invention,
4 is a conceptual view showing the positions of an earthquake-proof buffer and a horizontal buffer installed in a frame in the present invention,
5 is a conceptual diagram showing the principle of resonance in a wave graph,

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

1 is a front view showing an earthquake-proof buffering part 30 in the present invention, FIG. 2 is a front view showing a horizontal buffering part 40 for absorbing horizontal vibration applied to a switchboard in the present invention, and FIG. FIG. 4 is a perspective view conceptually showing an installation position of the seismic buffer and the horizontal buffer in the frame, FIG. 5 is a perspective view schematically showing the installation positions of the seismic buffer and the elastic buffer, FIG. 2 is a graph schematically showing the principle of resonance generated by increasing amplitude. FIG.

Hereinafter, a detailed description will be given of the interaction between structures, features, and configurations of the respective components of the seismic resistant switchboard according to a preferred embodiment of the present invention shown in the accompanying drawings.

The present invention relates to a switchboard in which an earthquake-proof device is provided at the bottom and includes a switchboard (10), a frame (20) provided between a lower base (G) of the switchboard (10) and the switchboard And an earthquake-proof buffering part 30 installed in the earthquake-proof housing 20.

In Fig. 1, an earthquake-proof buffer 30 is shown, and a frame 20 is shown in Fig.

The frame 20 is a kind of support frame in which the vibration damping buffer 30 can be installed.

As shown in Fig. 3, the frame 20 is composed of a first frame 21 and a second frame 22.

The first frame 21 and the second frame 22 are connected to each other only by the seismic buffer 30 and the horizontal buffer 40 to be described later and are otherwise separated to be variable with respect to each other.

The first frame 21 is fixedly attached to the bottom surface of the switchboard 10 and the second frame 22 is fixedly attached to the top surface of the base G which is the bottom surface on which the switchboard 10 is placed.

This is because the earthquake buffer 30 to be described later serves to attenuate the vibration of the foundation G so that the vibration of the foundation G is not immediately transmitted to the switchboard 10 so that the frame 20 on which the earthquake- This is because it has to be divided into parts.

At this time, if the frame 20 is divided into two parts, one of them will be referred to as a first frame 21 and the other will be referred to as a second frame 22.

If the frame 10 is not separated into two parts but is firmly joined to each other, the vibration of the base G is transmitted to the switchboard 10 as it is, so that the frame 10 is separated into two parts do.

At this time, one of them should be fixedly attached to the switchboard 10 and the other one to the base G, and the separated two parts will be referred to as a first frame 21 and a second frame 22, respectively.

The minimum condition that the first frame 21 and the second frame 22 should have is that there must be a portion facing each other in the up-and-down direction.

Although the frame 20 is shown as being similar to a box of a rigid material in FIG. 3, this is only one embodiment, and the shapes of the first frame 21 and the second frame 22 are not limited to the above- There is no particular limitation.

The first frame 21 and the second frame 22 may be formed so as to be opposed to each other in the horizontal direction in order to further include the horizontal buffer 40 to be described later.

That is, the minimum condition of the frame 20 of the present invention for installing the seismic buffering portion 30 is that the first frame 21 and the second frame 22 have a portion facing each other in the vertical direction, that is, Both of the first frame 21 and the second frame 22 have a flat plate of a rigid material horizontal to the base G. [

1 to 3, a portion of the flat plate horizontal to the base G as a ground in the first frame 21 is referred to as a first horizontal plate 211, And the flat plate portion horizontal to the base G will be referred to as a second horizontal plate 221. [

At this time, as shown in FIG. 1, an earthquake-proof buffering part 30 is installed at a position where the first horizontal board 211 and the second horizontal board 221 are vertically opposed to each other.

The earthquake-proof buffer 30 connects the first frame 21 and the second frame 22 so as to be mutually variable.

1, the vibration damping buffer 30 includes a coil spring 31 arranged vertically between the first horizontal board 211 and the second horizontal board 221, and a coil spring 31 And a variable joint 34 for connecting the first horizontal board 211 and the second horizontal board 221. [

The coil spring 31 is compressed by the load of the switchboard 10, which is received by the upper first horizontal plate 211.

The variable joint 34 is a member made of a rigid material, one end of which is fixedly coupled to the bottom surface of the first horizontal board 211, and the other end thereof is fixedly coupled to the upper surface of the second horizontal board 221. At this time, in order to couple one end of the variable joint 34 to the first horizontal plate 211, a bolt passing through from the bottom of the busbar 10 to the first horizontal plate 211 in a coaxial direction with the variable joint 34 is provided .

The variable joint 34 may be a steel chain 343 or a universal joint and may be any member that can be connected to the first frame 21 and the second frame 22 such that the first frame 21 and the second frame 22 are mutually variable. It is possible.

The variable joint 34 serves as a stopper for forcing the interval between the first frame 21 and the second frame 22 to be not more than a certain range. That is, if the variable joint 34 is composed of two threaded rods 341, 342 and a steel chain 343, the maximum length of the steel chain 343 that can be unfolded is the maximum length of the variable joint 34. Therefore, since the limit of the tensile deformation of the coil spring 31, which will be described later, is limited to the maximum length of the variable joint 34, it acts to suppress the occurrence of resonance of the coil spring 31.

The occurrence of resonance can cause damage that is less than that caused by direct transmission of a seismic wave. The condition under which resonance occurs is that the natural frequency of the structure itself coincides with the external operating frequency.

The resonance to be avoided in the present invention can be generated when the natural frequency of the coil spring itself and the operating frequency of the seismic wave coincide with each other.

As shown in FIG. 6, when the superposition of the waves occurs, the amplitude becomes larger as the sum of the amplitudes of the respective waves. When the resonance occurs on the same principle, the damage more than the operation frequency of the seismic wave itself .

In order to prevent such damage, the variable joint 34 is provided in the present invention so that the coil spring can not be expanded beyond a predetermined length. The width and position between the first frame 21 and the second frame 22 can be somewhat variable due to the variable joint 34 so that both the P wave and the S wave of the seismic wave can be absorbed by the coil spring 31 And the generation of resonance due to the tuning of the coil spring 31 and the seismic waves is suppressed by the role of the variable joint 34 as a stopper.

However, resonance occurrence can be prevented as much as possible if the means for controlling the resonance itself are combined together in that the variable joint 34 acts to suppress the resonance.

To this end, in the present invention, vibration damping means for changing the natural frequency of the coil spring 31 by pressing the outer peripheral surface of the coil spring 31 is provided.

The vibration damping means is preferably made in the form of an elastic band (32). Hereinafter, the vibration damping means of the present invention will be described as an elastic band 32.

The elastic band 32 compresses the vibration of the coil spring 31 by a method of pressing the outer peripheral surface of the coil spring 31 to change the natural frequency of the coil spring 31 and to function as a damper, .

Therefore, the elastic band 32 is formed of a material that can exert a strong elastic force so as to block the vibration of the coil spring 31. The thickness and the width of the elastic band 32 can be adjusted by adjusting the vibration absorbing capacity of the coil spring 31 to an appropriate level The vibration can be blocked.

The material, thickness and width of the elastic band 32 may vary depending on the load of the switchboard 10.

Further, by adjusting the height at which the elastic band 32 is coupled to the coil spring 31, the natural frequency of the coil spring 31 can be changed.

The elastic bands 32 provided on the plurality of the switchgears 10 may be coupled to the coil springs 31 so that the elastic bands 32 are coupled to the coil springs 31, The heights may be different from each other.

By varying the heights of the elastic bands 32 coupled to the plurality of coil springs 31 provided on one switchboard 10, the natural frequencies of the coil springs 31 are different from each other, The resonance effects of the elastic springs 31 can be canceled each other.

Meanwhile, in the present invention, there may be a portion where the first frame 21 and the second frame 22 are opposed to each other in the horizontal direction. At this time, in order to be opposed in the horizontal direction, plates each forming a vertical plane to the first frame 21 and the second frame 22 may be further provided. FIG. 3 shows a state in which the first frame 21 and the second frame 22 are further provided with vertical plates.

3, the vertical plate provided in the first frame 21 is referred to as a first vertical plate 212 and the vertical plate provided in the second frame 22 is referred to as a second vertical plate 222 .

In particular, as shown in FIG. 2, a horizontal buffer 40 connecting the first vertical plate 212 and the second vertical plate 222 may be provided.

The horizontal buffer 40 corresponds to a conventional spiral slit coupling or a helical buffer. Even if the horizontal buffer section 40 connecting the first vertical plate 212 and the second vertical plate 222 opposed to each other is eccentric or offset due to vibration of the earthquake, A force is applied so that the two vertical plates 222 are parallel to each other, thereby absorbing and attenuating the vibration of the earthquake.

Specifically, as shown in FIG. 2, the horizontal buffer 40 includes a machined spring 41 in which a slit is formed in a spiral shape in a cylindrical metal, a first shaft 41 which is coupled to both sides of the machined spring 41, (422) and a second shaft (423).

The first shaft 422 and the second shaft 423 are fixedly coupled to the first vertical plate 212 and the second vertical plate 222, respectively.

At this time, the force for returning the eccentricity is determined according to the position at which both ends of the machined spring 41 in which the slit is formed in the cylindrical metal are coupled to the first and second shafts 422, 423.

Both the first and second shafts 422 and 423 can be coupled to corresponding threads formed on the inner circumferential surface of both ends of the machined spring 41 by forming a thread on the outer circumferential surface. Accordingly, when the machine-springs 41 are screwed to the first and second shafts 422 and 423, the length of the machine-made spring 41 is adjusted according to the degree of tightening, so that the eccentric force generated by the earthquake vibration or the force Can vary.

In addition to the earthquake, it can be influenced by the wind in the case of the outdoor switchgear installed in the outdoors. Especially in the region where the windy region or the typhoon passes, the external force is received as much as the earthquake. The action of the buffer 40 may become important.

Therefore, it is necessary to adjust the length of the machine-made spring 41 as much as necessary according to the region. In order to easily adjust the length of the machine-operated spring 41, the first horizontal plate 211 It is preferable to form the hand hole H so that the coupling length of the machine-made spring 41 can be adjusted.

Meanwhile, the number of the seismic buffering part 30 and the horizontal buffering part 40 may be plural in the lower part of the single switchboard 10. At this time, there is no particular limitation on the installation position and the number of the seismic buffering part 30 and the horizontal buffering part 40, but it is possible to arrange them in the form of FIG. 3 or 4 as a possible embodiment. The mounting position and number of the seismic buffering part 30 and the horizontal buffering part 40 can be adjusted to an appropriate number according to the size, the load and the installation area of the switchboard 10.

1, a spring cap 36 may be provided at both ends of the coil spring 31 so as to prevent the side surface of the coil spring 31 from being separated from the seismic buffer 30 according to the present invention. The spring cap is provided between the frame 20 and the coil spring 31 so as to surround the end of the coil spring 31 to prevent the coil spring 31 from deviating in the lateral direction.

The spring cap 36 may be provided only at one end of the coil spring 31 or at both ends of the coil spring 31.

On the other hand, a neoprene dustproof pad 60 can be inserted between the frame 20 and the switchboard 10 or between the frame 20 and the base G as shown in FIG.

Seismic waves have a strong short - period component and long - term components tend to be weak. Therefore, when an earthquake is applied to a middle - low - rise structure where a natural period similar to an earthquake occurs, a resonance phenomenon occurs and the dynamic response of the structure is increased. This principle is also applied to the case of the switchboard 10.

Therefore, the neoprene vibration pad 60 can provide a vibration damping effect by blocking the dynamic response of the switchboard 10 and the base G due to its own dustproof capability. Such an action is caused by the action of the seismic buffer 30, The influence of the vibration of the transmission / reception section 10 on the transmission / reception section 10 can be further minimized.

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 inventions. It will be apparent to those of ordinary skill in the art.

G: Base H: Hand hole
10: Switchboard 20: Frame
21: first frame 22: second frame
30: earthquake-proof buffering portion 31: coil spring
32: elastic band 34: variable joint
36: spring cap 40: horizontal buffer
41: Machine springs 60: Neoprene vibration proof pads
211: first horizontal plate 212: first vertical plate
221: second horizontal plate 222: second vertical plate
321: support 341,342: threaded rod
343: steel chain 422: first shaft
423: Second shaft

Claims (8)

A power distribution unit and an enclosure in which water distribution equipment is installed;
A frame including a first frame fixedly attached to a bottom surface of a switchboard, a second frame fixedly attached to an upper surface of a foundation on which the power plant is placed and being variable with respect to the first frame,
A variable joint of a rigid material connecting the first frame and the second frame at vertically opposite positions, a coil spring elastically compressed between the first frame and the second frame due to the load of the switchboard, An anti-earthquake cushion comprising an anti-vibration means; , ≪ / RTI &
Wherein the vibration damping means is an elastic band for resonance period control for pressing the outer peripheral surface of the spring. The method according to claim 1,
Wherein the variable joint is disposed inside the coil spring and comprises two threaded rods respectively attached to the first and second frames and a steel chain or universal joint connecting between the threaded rods. delete The method according to claim 1,
Wherein the elastic band is formed with at least one support piece connecting the opposing points of the inner circumferential surface so that expansion of the elastic ring is suppressed. The method according to claim 1,
Wherein at least one of the plurality of earthquake-proof cushioning parts is different from the remaining earthquake-proof cushioning parts in that the height at which the elastic band is coupled to the coil spring is different from that of the remaining earthquake-proof cushioning part. The method according to claim 1,
Further comprising a vibration damping horizontal buffer disposed between points where the first frame and the second frame are horizontally opposed to each other. The method according to claim 6,
Wherein the horizontal buffer comprises two bolts adhered to the first frame and the second frame respectively and coupling nuts having holes formed on both sides of the bolts so that the intervals between the two bolts are variable, And a machine-made spring coupled to an outer circumferential surface of the bolt and the coupling nut. The method according to claim 1,
And a spring cap for separating the end portion of the coil spring is disposed between the coil spring and the first or second frame in the seismic buffer.
KR1020150055422A 2015-04-20 2015-04-20 earthquake-proof panel board KR101593148B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180063602A (en) * 2016-12-02 2018-06-12 주식회사 대경산전 Seismic switchgear equipped with shock absorber having crista structure
KR101937793B1 (en) 2017-01-20 2019-01-11 주식회사 일신전기 Earthquake-proof apparatus for power distributing equipment
KR101959200B1 (en) * 2018-06-07 2019-03-19 (주)세풍전기 Seismic Module for Switchboard
KR20200122185A (en) * 2019-04-17 2020-10-27 한화파워시스템 주식회사 Support assembly
KR102438325B1 (en) * 2021-09-24 2022-09-01 금강전기산업(주) support for solar structure with seismic function

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Publication number Priority date Publication date Assignee Title
KR101495094B1 (en) * 2014-07-01 2015-02-25 주식회사 일신전기 Earthquake-proof apparatus for power distributing equipment
KR101497144B1 (en) * 2014-05-26 2015-03-11 주식회사 라이트 제림 Aseismic constructing method and aseismic device of computation equipment on the access floor
KR101507871B1 (en) * 2014-10-29 2015-04-08 유림산전(주) Vibrating energy reducing type for earthquake resistant electrical panel board

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101497144B1 (en) * 2014-05-26 2015-03-11 주식회사 라이트 제림 Aseismic constructing method and aseismic device of computation equipment on the access floor
KR101495094B1 (en) * 2014-07-01 2015-02-25 주식회사 일신전기 Earthquake-proof apparatus for power distributing equipment
KR101507871B1 (en) * 2014-10-29 2015-04-08 유림산전(주) Vibrating energy reducing type for earthquake resistant electrical panel board

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180063602A (en) * 2016-12-02 2018-06-12 주식회사 대경산전 Seismic switchgear equipped with shock absorber having crista structure
KR101927712B1 (en) 2016-12-02 2018-12-11 (주)대경산전 Seismic switchgear equipped with shock absorber having crista structure
KR101937793B1 (en) 2017-01-20 2019-01-11 주식회사 일신전기 Earthquake-proof apparatus for power distributing equipment
KR101959200B1 (en) * 2018-06-07 2019-03-19 (주)세풍전기 Seismic Module for Switchboard
KR20200122185A (en) * 2019-04-17 2020-10-27 한화파워시스템 주식회사 Support assembly
KR102659633B1 (en) 2019-04-17 2024-04-22 한화파워시스템 주식회사 Support assembly
KR102438325B1 (en) * 2021-09-24 2022-09-01 금강전기산업(주) support for solar structure with seismic function

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