CA1190620A - Bushing mounting device - Google Patents
Bushing mounting deviceInfo
- Publication number
- CA1190620A CA1190620A CA000399206A CA399206A CA1190620A CA 1190620 A CA1190620 A CA 1190620A CA 000399206 A CA000399206 A CA 000399206A CA 399206 A CA399206 A CA 399206A CA 1190620 A CA1190620 A CA 1190620A
- Authority
- CA
- Canada
- Prior art keywords
- bushing
- dampers
- flange
- seat
- mounting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/265—Fastening of insulators to support
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B5/00—Non-enclosed substations; Substations with enclosed and non-enclosed equipment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B5/00—Non-enclosed substations; Substations with enclosed and non-enclosed equipment
- H02B5/06—Non-enclosed substations; Substations with enclosed and non-enclosed equipment gas-insulated
Abstract
ABSTRACT OF THE DISCLOSURE
A bushing mounting device for use with large ceramic bushings used with high voltage equipment is provided with vibr-ation dampers so as to have an aseismatic effect. The vibration dampers are friction dampers including a number of cup springs disposed on either side of the bushing mounting flange.
A bushing mounting device for use with large ceramic bushings used with high voltage equipment is provided with vibr-ation dampers so as to have an aseismatic effect. The vibration dampers are friction dampers including a number of cup springs disposed on either side of the bushing mounting flange.
Description
2~-~
:1. BACI~G~OUND OE~` TEIE INVE.N~`ION
This invention relates to devices for mounting a bushing of the type used with the lead wire portion of a power trans~ormer or tank -type switching device, and more particularly to a device for mounting a large bushing on high voltage electrical equipment, e.g. of the 400 KV class and above.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is an explanatory diagram showing a bush-ing mounted on electrical equipment;
Fig. 2 is a sectional view showing one example of a conven-tional bushing mounting devicei Fig. 3 is an e~planatory diagram for describing the operation of the device shown in Fig. 2;
Fig. 4 is a view, partly in cross section, of a bushing mounting part, showing one embodiment of this invention;
Fig. 5 is a sectional view, similar to Fig. 4, showing another embodiment of the invention; and Fig. 6 is an explanatory dia~ram illustratlng the operation of the devices of Figs. 4 and 5.
In the case where high voltage electrical equip-ment is used in an environment where damage due to airborne pollutants such as salt and dust is high, bushings are used ~5 which have long porcelain tubes with the surface leakage distances increased, so that the electrical equipment can withstand the environment. ~hen such equipment is employed 1 :in a re~ion havincJ Ere(Iuent earthquakes, for example in Japan, it is designed with emphasis on aseismatic strenc~-th.
When the bushing installed on the electrical equipment encounters an earthquake, the amplification of the earth-quake, as experienced by the bushing, is affected by the position of the installation, the foundation and tank portions of the equipment, and sometimes the bushing is vibrated more than expected. The natural frequency of the bushing is determined by the weight distribution and rigid ity of various parts of the equipmen-t. When the natural frequency of the bushing appro~imates or equals the pre-vailing frequency of the earthqua]~es, then a resonant phenomenon is developed such that the vibrations are amplified to a very ~arge magni.tude. Such amplified vibrations may exceed the breaking strength of the bushing, resulting in the breaking of the latter.
It is generally said that the greater part of the prevailing frequency of an earthquake ranges from one to ten hert2. Bushin~s mounted on electrical equipment of 220 KV
or higher classifications may have a natural freqency less than -ten hertz. Thus, the bushings of these classifications should have a sufficient dynamic aseismatic strength.
The bushings should be desiyned taking in-to con-sideration the biggest earthquake which may occur in the future instead of the greatest earthquake which has previously occured. A bushing with a small porcelain tube is high in natural frequency~ and thus no resonant phenomenon is developed.
~9o~
:l In general, the vibration oE the largest earth-quake will no-t exceed the breaking stress of a porcelain tube having a height of up to 3 to ~ m. As the height of the porcelain tube increases, the diameter is also increased and the weight is increased proportiona-tely. Accordingly, the mechanical stress occurring upon vibration is increased.
~specially in the case of bushing which is resistive against damage due to salt, and which is used with electrical equip-ment of the 500 KV classification, the height of the upper porcelain tube may be 6 to 8 m, and the natural frequency is on the order of 3 to 5 Hz. Therefore, during an earth-quake, the vibration may exceed the breaking stress of the procelain tube, with the aid of the resonant phenomenon.
In a bushing for electrical equipment of the UHV (1000 KV) classification, the porcelain tube is as long as about 12 m.
Thus, this bushing is more li.l~ely to be damaged in the event of an earthquake.
A bushing is mounted on a mounting seat installed on the equipment as shown in Fig. 1. More specifically, the mounting flange 3 of a bushing 2 is fixedly secured to a bushing mounting seat 1 of the equipment.
When the electrical equipment encounters an earth-qua~e, the vibration of the ground surface is amplified through the foundation and tank portions of the electrical equipment, as a result of which the amplitude of the vibra-tion is increased several t~mes. Accordingly, stress developed in the porcelain tube may exceed the breaking --3~
j~
L s-tress, thus damaginc3 the bushing. In order to increase the aseismatic streng-th oE the bushing, a variety of devices have been proposed in which the vibration is greatly damped at the mounting portion to thereby decrease the accelera-tion response thereof.
One example of such a device is shown in Fig. 2.
The operating range of an oil damper 5, having coil compres-sion springs 4 arranged at equal, intervals on the circular periphery of a mounting part, is limited by a mounting guide 6, so that the oil damper 5 is not activated before the stress developed in the porcelain tube e~ceedS the breaking stress. That is, the damper operates only when a great vibration occurs, to decrease the shock of the vibra-tion, i.e. the accelera-tion response of the bushing, to thereby increase the aseismatic strength.
In the operation of the device shown in Fig. 2, the displacement of the bushing is as indicated by the dotted line 2' in Fig. 3; that is, the displacement takes place with the periphery oE the mounting flange 3 as the fulcrum. In this case, the amount of displacement oE the oil damper 3 having the coil springs is large, and the amount of compression of the coil springs 4 is also largei that is, the compression strength varies greatly with the ampli-tude. Therefore, depending on the magnitude of the amplitude, the stress developed in the porcelain tube may exceed the breaking stress thereofO Thus, -this structure is not always securable against s-trong earthquakes. When the phase of :L the busllin~3 is i.nverted by a v:i.brat.ion largc in amp:Litude, -~he mounting flanc3e 3 of the bushing 2 may collide with -the mounting guide 6, -thus generating an i~pact s-tress.
This is another drawback of tne conventional device.
U.S. patent 4,267,400, commonly assigned, dis-closes another type of damped bushing struc-ture somewhat similar to that just discussed above, but wherein a resil-ien-t buffer, a bellows seal and dish springs are also used to advantage. However, this device, like prior devices, contains only one set of springs so that the displacement of the bushing is limited as above.
SU~lMARY OF THE INVENTION
An ob~ect of this invention is to eliminate the above-descri.bed drawbacks accompanying a conventional bush-ing mounting device. A speciEic feature of a bushing mounting device of the invention resides in that :Eric-tion dampers made up of a number of stac~ed annular springs such as cup springs or ring-shaped springs are installed on both sides of a bushi.ng flange or bushirlc3 mounting seat.
~5-1 DETAILED DES.C~IPT~ON OF TH~ P~EFERR~D EM~ODIMENTS
This inventIon ~111 be described with reference to the embodiments thereof shown in Figs~ 4 and 5. As shown in Figs. 4 and 5, frIction dampers 10, 11 and 12 are arranged on the lo~er and upper surfaces of a mounting flange 3 for a ~ushing 2. The frict1on dampers 10, 11 and 12 are formed by stacking annular springs such as ring-shaped or cup sprin~s, and are di~posed at equal intervals in a circle and secured to a mountIng seat 13 with bolts and nuts 14. The space between the bushing mounting flange
:1. BACI~G~OUND OE~` TEIE INVE.N~`ION
This invention relates to devices for mounting a bushing of the type used with the lead wire portion of a power trans~ormer or tank -type switching device, and more particularly to a device for mounting a large bushing on high voltage electrical equipment, e.g. of the 400 KV class and above.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is an explanatory diagram showing a bush-ing mounted on electrical equipment;
Fig. 2 is a sectional view showing one example of a conven-tional bushing mounting devicei Fig. 3 is an e~planatory diagram for describing the operation of the device shown in Fig. 2;
Fig. 4 is a view, partly in cross section, of a bushing mounting part, showing one embodiment of this invention;
Fig. 5 is a sectional view, similar to Fig. 4, showing another embodiment of the invention; and Fig. 6 is an explanatory dia~ram illustratlng the operation of the devices of Figs. 4 and 5.
In the case where high voltage electrical equip-ment is used in an environment where damage due to airborne pollutants such as salt and dust is high, bushings are used ~5 which have long porcelain tubes with the surface leakage distances increased, so that the electrical equipment can withstand the environment. ~hen such equipment is employed 1 :in a re~ion havincJ Ere(Iuent earthquakes, for example in Japan, it is designed with emphasis on aseismatic strenc~-th.
When the bushing installed on the electrical equipment encounters an earthquake, the amplification of the earth-quake, as experienced by the bushing, is affected by the position of the installation, the foundation and tank portions of the equipment, and sometimes the bushing is vibrated more than expected. The natural frequency of the bushing is determined by the weight distribution and rigid ity of various parts of the equipmen-t. When the natural frequency of the bushing appro~imates or equals the pre-vailing frequency of the earthqua]~es, then a resonant phenomenon is developed such that the vibrations are amplified to a very ~arge magni.tude. Such amplified vibrations may exceed the breaking strength of the bushing, resulting in the breaking of the latter.
It is generally said that the greater part of the prevailing frequency of an earthquake ranges from one to ten hert2. Bushin~s mounted on electrical equipment of 220 KV
or higher classifications may have a natural freqency less than -ten hertz. Thus, the bushings of these classifications should have a sufficient dynamic aseismatic strength.
The bushings should be desiyned taking in-to con-sideration the biggest earthquake which may occur in the future instead of the greatest earthquake which has previously occured. A bushing with a small porcelain tube is high in natural frequency~ and thus no resonant phenomenon is developed.
~9o~
:l In general, the vibration oE the largest earth-quake will no-t exceed the breaking stress of a porcelain tube having a height of up to 3 to ~ m. As the height of the porcelain tube increases, the diameter is also increased and the weight is increased proportiona-tely. Accordingly, the mechanical stress occurring upon vibration is increased.
~specially in the case of bushing which is resistive against damage due to salt, and which is used with electrical equip-ment of the 500 KV classification, the height of the upper porcelain tube may be 6 to 8 m, and the natural frequency is on the order of 3 to 5 Hz. Therefore, during an earth-quake, the vibration may exceed the breaking stress of the procelain tube, with the aid of the resonant phenomenon.
In a bushing for electrical equipment of the UHV (1000 KV) classification, the porcelain tube is as long as about 12 m.
Thus, this bushing is more li.l~ely to be damaged in the event of an earthquake.
A bushing is mounted on a mounting seat installed on the equipment as shown in Fig. 1. More specifically, the mounting flange 3 of a bushing 2 is fixedly secured to a bushing mounting seat 1 of the equipment.
When the electrical equipment encounters an earth-qua~e, the vibration of the ground surface is amplified through the foundation and tank portions of the electrical equipment, as a result of which the amplitude of the vibra-tion is increased several t~mes. Accordingly, stress developed in the porcelain tube may exceed the breaking --3~
j~
L s-tress, thus damaginc3 the bushing. In order to increase the aseismatic streng-th oE the bushing, a variety of devices have been proposed in which the vibration is greatly damped at the mounting portion to thereby decrease the accelera-tion response thereof.
One example of such a device is shown in Fig. 2.
The operating range of an oil damper 5, having coil compres-sion springs 4 arranged at equal, intervals on the circular periphery of a mounting part, is limited by a mounting guide 6, so that the oil damper 5 is not activated before the stress developed in the porcelain tube e~ceedS the breaking stress. That is, the damper operates only when a great vibration occurs, to decrease the shock of the vibra-tion, i.e. the accelera-tion response of the bushing, to thereby increase the aseismatic strength.
In the operation of the device shown in Fig. 2, the displacement of the bushing is as indicated by the dotted line 2' in Fig. 3; that is, the displacement takes place with the periphery oE the mounting flange 3 as the fulcrum. In this case, the amount of displacement oE the oil damper 3 having the coil springs is large, and the amount of compression of the coil springs 4 is also largei that is, the compression strength varies greatly with the ampli-tude. Therefore, depending on the magnitude of the amplitude, the stress developed in the porcelain tube may exceed the breaking stress thereofO Thus, -this structure is not always securable against s-trong earthquakes. When the phase of :L the busllin~3 is i.nverted by a v:i.brat.ion largc in amp:Litude, -~he mounting flanc3e 3 of the bushing 2 may collide with -the mounting guide 6, -thus generating an i~pact s-tress.
This is another drawback of tne conventional device.
U.S. patent 4,267,400, commonly assigned, dis-closes another type of damped bushing struc-ture somewhat similar to that just discussed above, but wherein a resil-ien-t buffer, a bellows seal and dish springs are also used to advantage. However, this device, like prior devices, contains only one set of springs so that the displacement of the bushing is limited as above.
SU~lMARY OF THE INVENTION
An ob~ect of this invention is to eliminate the above-descri.bed drawbacks accompanying a conventional bush-ing mounting device. A speciEic feature of a bushing mounting device of the invention resides in that :Eric-tion dampers made up of a number of stac~ed annular springs such as cup springs or ring-shaped springs are installed on both sides of a bushi.ng flange or bushirlc3 mounting seat.
~5-1 DETAILED DES.C~IPT~ON OF TH~ P~EFERR~D EM~ODIMENTS
This inventIon ~111 be described with reference to the embodiments thereof shown in Figs~ 4 and 5. As shown in Figs. 4 and 5, frIction dampers 10, 11 and 12 are arranged on the lo~er and upper surfaces of a mounting flange 3 for a ~ushing 2. The frict1on dampers 10, 11 and 12 are formed by stacking annular springs such as ring-shaped or cup sprin~s, and are di~posed at equal intervals in a circle and secured to a mountIng seat 13 with bolts and nuts 14. The space between the bushing mounting flange
3 and the moun-ting seat 13 is sealed with a bellows lS.
The bushing 2 is mounted as described above~ When electrical equipment having this mounting structure exper-iences an earth~ua~e/ the displacement of the bushing mount-ing part is as indicated by the dotted line 2" in Fig. 6,which is an explanatory diagram of the operation of the bushing mounting device. That is, ~he displacement of the bushing is vibration a~out the center of the mounting flange, and the vertical motion is damped by the friction dampers 10, 11 and 12 arranged on the periphery of the mounting flange. Thus, a damping effect can ~e o~tained even in a low level vibration range~ and the shock imparted to the bushing end can be reduced to a lo~ value.
The damping factors of bushings of 500 KV or UH~
~1000 KV~ classificat~ons are, in general, on the order of 5 to 7 %, and the acceler~tion responses of the ends thereof are on the order of seven ~o fifteen times~ Therefore~ when ~6 2~
1. a great earthqu~ke ta~es place, the stre~s in the porcelain tube may e~ceed the breakage stress value thereo~, Porcelain tubes of the UllV ~10~0 KV~ classification are 1~ to 12 m in diameter, and with respect -to aseismatic strength, in a region where earthquakes occur Erequently, for instance in Japan, a study has indicaied that the bushings can withs-tand earthquakes if the acceleration response of the bushing ends ;s decreased to about five times. Therefore, in the case of UHV bushings, by provi.ding friction dampers having a damping factor of about 10 ~, electrî.cal equipment whi.ch can withstand the largest earthquake can be o~tained, Another em~odiment of this invention is as shown in Fig. 5. In this embodiment~ friction dampers lla and 12a are arranged on the upper and lower surfaces of a ~ushing lS mounting seat 13a, respectively, and are coupled to a bush-ing mounting flange 3. The space between -the bushi.ng mount-ing flange 3 and the bushing mounting seat .13a is sealed with.a bellows 15a set outside the friction dampers.
Th.erefore, the friction dampers, in this ca~e, can be in-corpora-ted into the interior of the casing of the electrical equipment. It will be readily understood that the vibration damping effect of the device of Fig. 4 is completely equal to that of the device of Fig. 5.
The bushing 2 is mounted as described above~ When electrical equipment having this mounting structure exper-iences an earth~ua~e/ the displacement of the bushing mount-ing part is as indicated by the dotted line 2" in Fig. 6,which is an explanatory diagram of the operation of the bushing mounting device. That is, ~he displacement of the bushing is vibration a~out the center of the mounting flange, and the vertical motion is damped by the friction dampers 10, 11 and 12 arranged on the periphery of the mounting flange. Thus, a damping effect can ~e o~tained even in a low level vibration range~ and the shock imparted to the bushing end can be reduced to a lo~ value.
The damping factors of bushings of 500 KV or UH~
~1000 KV~ classificat~ons are, in general, on the order of 5 to 7 %, and the acceler~tion responses of the ends thereof are on the order of seven ~o fifteen times~ Therefore~ when ~6 2~
1. a great earthqu~ke ta~es place, the stre~s in the porcelain tube may e~ceed the breakage stress value thereo~, Porcelain tubes of the UllV ~10~0 KV~ classification are 1~ to 12 m in diameter, and with respect -to aseismatic strength, in a region where earthquakes occur Erequently, for instance in Japan, a study has indicaied that the bushings can withs-tand earthquakes if the acceleration response of the bushing ends ;s decreased to about five times. Therefore, in the case of UHV bushings, by provi.ding friction dampers having a damping factor of about 10 ~, electrî.cal equipment whi.ch can withstand the largest earthquake can be o~tained, Another em~odiment of this invention is as shown in Fig. 5. In this embodiment~ friction dampers lla and 12a are arranged on the upper and lower surfaces of a ~ushing lS mounting seat 13a, respectively, and are coupled to a bush-ing mounting flange 3. The space between -the bushi.ng mount-ing flange 3 and the bushing mounting seat .13a is sealed with.a bellows 15a set outside the friction dampers.
Th.erefore, the friction dampers, in this ca~e, can be in-corpora-ted into the interior of the casing of the electrical equipment. It will be readily understood that the vibration damping effect of the device of Fig. 4 is completely equal to that of the device of Fig. 5.
Claims (6)
1. A bushing mounting device, comprising:
a flange for mounting a bushing, said flange being located at a lower end of a procelain tube of said bushing;
a mounting seat, said seat being connected to said flange via a plurality of dampers, said dampers being disposed on both sides of said mounting flange; and sealing means disposed between said flange and said seat, said sealing means comprising a flexible bellows attached to said flange and said seat at either end thereof and being disposed radially inward of said dampers.
a flange for mounting a bushing, said flange being located at a lower end of a procelain tube of said bushing;
a mounting seat, said seat being connected to said flange via a plurality of dampers, said dampers being disposed on both sides of said mounting flange; and sealing means disposed between said flange and said seat, said sealing means comprising a flexible bellows attached to said flange and said seat at either end thereof and being disposed radially inward of said dampers.
2. A bushing mounting device as claimed in claim 1, said dampers comprising friction dampers including a plur-ality of cup springs.
3. A bushing mounting device as claimed in claim 1, said dampers being arranged at equal intervals about the periphery of both sides of said flange, said dampers com-prising springs, and bolts extending upwardly through said springs from said seat.
4. A bushing mounting device, comprising:
a flange for mounting a bushing, said flange being located at a lower end of a porcelain tube of said bushing;
4. A bushing mounting device, comprising:
a flange for mounting a bushing, said flange being located at a lower end of a porcelain tube of said bushing;
Claim 4 cont.
a mounting seat, said seat being connected to said flange via a plurality of dampers, said dampers being disposed on both sides of said mounting seat; and sealing means disposed between said flange and said seat, said sealing means comprising a flexible bellows attached to said flange and said seat at either end thereof and being disposed radially outward of said dampers.
a mounting seat, said seat being connected to said flange via a plurality of dampers, said dampers being disposed on both sides of said mounting seat; and sealing means disposed between said flange and said seat, said sealing means comprising a flexible bellows attached to said flange and said seat at either end thereof and being disposed radially outward of said dampers.
5. A bushing mounting device as claimed in claim 4, said dampers comprising friction dampers including a plur-ality of cup springs.
6. A bushing mounting device as claimed in claim 4, said dampers being arranged at equal intervals about the periphery of either side of said seat, and bolts extending downwardly through said springs from said flange.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56046860A JPS57160107A (en) | 1981-03-27 | 1981-03-27 | Bushing attaching device |
| JP46860/81 | 1981-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1190620A true CA1190620A (en) | 1985-07-16 |
Family
ID=12759086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000399206A Expired CA1190620A (en) | 1981-03-27 | 1982-03-23 | Bushing mounting device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS57160107A (en) |
| CA (1) | CA1190620A (en) |
| DE (1) | DE3211089A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525643A (en) * | 2017-09-25 | 2017-12-29 | 南方电网科学研究院有限责任公司 | Ultrahigh voltage direct current wall bushing shock test device and test method |
| US9893506B2 (en) | 2012-09-24 | 2018-02-13 | Siemens Aktiengesellschaft | Damping arrangement for an oscillatably mounted electrical energy transmission device |
| US10277020B2 (en) | 2017-04-27 | 2019-04-30 | Siemens Aktiengesellschaft | Leadthrough device and building with a leadthrough device |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE437742B (en) * | 1983-08-04 | 1985-03-11 | Asea Ab | ELECTRIC HIGH VOLTAGE THROUGH |
| JP4497795B2 (en) * | 2002-06-28 | 2010-07-07 | 株式会社ブリヂストン | Seismic pads, insulator mounting structure, and transformer equipment |
| CN105406374B (en) * | 2015-11-27 | 2018-02-09 | 同济大学 | A kind of Anti-seismic transformer station pillar equipment connecting device of adjustable mounting position |
| CN106786032B (en) * | 2016-11-29 | 2018-07-03 | 同济大学 | A kind of vibration control apparatus for converter valve |
| CN106684727B (en) * | 2016-11-29 | 2018-07-03 | 同济大学 | A kind of structure for being used to control converter valve tower vibrations |
| CN109066533A (en) * | 2018-08-09 | 2018-12-21 | 中国电力工程顾问集团西南电力设计院有限公司 | Valve hall ± 800kV cannula structure |
| CN112928608B (en) * | 2021-03-25 | 2022-02-15 | 中南大学 | Corrugated sliding friction energy consumption telescopic pipe bus for transformer substation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3856242A (en) * | 1973-03-29 | 1974-12-24 | Gen Electric | Mounting apparatus for a surge voltage arrester |
| JPS55109317A (en) * | 1979-02-16 | 1980-08-22 | Mitsubishi Electric Corp | Bushing |
| JPS601723B2 (en) * | 1979-06-28 | 1985-01-17 | 三菱電機株式会社 | butsing |
-
1981
- 1981-03-27 JP JP56046860A patent/JPS57160107A/en active Pending
-
1982
- 1982-03-23 CA CA000399206A patent/CA1190620A/en not_active Expired
- 1982-03-25 DE DE19823211089 patent/DE3211089A1/en not_active Ceased
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9893506B2 (en) | 2012-09-24 | 2018-02-13 | Siemens Aktiengesellschaft | Damping arrangement for an oscillatably mounted electrical energy transmission device |
| US10277020B2 (en) | 2017-04-27 | 2019-04-30 | Siemens Aktiengesellschaft | Leadthrough device and building with a leadthrough device |
| CN107525643A (en) * | 2017-09-25 | 2017-12-29 | 南方电网科学研究院有限责任公司 | Ultrahigh voltage direct current wall bushing shock test device and test method |
| CN107525643B (en) * | 2017-09-25 | 2024-02-13 | 南方电网科学研究院有限责任公司 | Extra-high voltage direct current wall bushing earthquake-resistant test device and test method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57160107A (en) | 1982-10-02 |
| DE3211089A1 (en) | 1982-10-21 |
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