CN113964707A - Extension method of box-type GIS busbar barrel - Google Patents

Extension method of box-type GIS busbar barrel Download PDF

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Publication number
CN113964707A
CN113964707A CN202111216331.5A CN202111216331A CN113964707A CN 113964707 A CN113964707 A CN 113964707A CN 202111216331 A CN202111216331 A CN 202111216331A CN 113964707 A CN113964707 A CN 113964707A
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CN
China
Prior art keywords
bus bar
newly
original
bus
gis
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Pending
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CN202111216331.5A
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Chinese (zh)
Inventor
刘奎
李阳
刘辉
王少军
钱国
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Shanghai Baoye Group Corp Ltd
Shanghai Baoye Metallurgy Engineering Co Ltd
Original Assignee
Shanghai Baoye Group Corp Ltd
Shanghai Baoye Metallurgy Engineering Co Ltd
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Application filed by Shanghai Baoye Group Corp Ltd, Shanghai Baoye Metallurgy Engineering Co Ltd filed Critical Shanghai Baoye Group Corp Ltd
Priority to CN202111216331.5A priority Critical patent/CN113964707A/en
Publication of CN113964707A publication Critical patent/CN113964707A/en
Pending legal-status Critical Current

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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
    • H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/005—Electrical connection between switchgear cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0358—Connections to in or out conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/055—Features relating to the gas

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

The invention provides an extension method of a box-type GIS bus tube, which comprises the following steps: SF in corresponding gas chamber in original bus tube on GIS interval to be expanded6Recovering the gas; splicing a newly-added bus tube at one end of the original bus tube close to the gas chamber; replacing the adsorbent in the adsorbent gas chamber on the original bus tube, and sealing the adsorbent chamber after the replacement is finished; injecting SF into corresponding gas chambers on the expanded GIS interval6A gas. The invention improves the operation efficiency, greatly shortens the splicing time of the bus tube, simultaneously improves the safety factor of operating personnel during working, particularly can restore the time of power consumption in production in advance, and ensures the expansionThe constructed GIS can normally operate at intervals, and considerable economic benefits are created.

Description

Extension method of box-type GIS busbar barrel
Technical Field
The invention relates to the technical field of power system equipment installation, in particular to an extension method of a box-type GIS bus tube.
Background
In recent years, along with the continuous increase of power grid load, the existing GIS (gas insulated switchgear) needs to be upgraded and modified, the 220kV full three-phase box type GIS expanded bus tube is used for expanding the GIS interval in the existing operation, the online modification is realized, the power needs to be cut off before the modification, part of users cannot use power, various air chambers exist in the GIS interval, if the gas leakage can be caused if the gas leakage is not properly processed, the safety of workers is influenced, therefore, the safe risk of carrying out the butt joint operation of the bus tube on line is large, uncertain factors are more, the butt joint time cannot be overlong, and the influence on normal production power utilization is avoided, and the larger economic loss is caused.
Disclosure of Invention
In view of the above, the invention provides an extension method of a box-type GIS bus tube, and aims to solve the problems that in the prior art, the butt joint efficiency of the GIS bus tube is low and potential safety hazards are easily generated.
The invention provides an extension method of a box-type GIS bus tube, which comprises the following steps:
step 1, recovering SF6 gas in corresponding gas chambers in an original bus tube on a GIS interval to be expanded;
step 2, splicing a newly-added bus bar barrel at one end, close to each gas chamber, of each two adjacent original bus bar barrels, so that the newly-added bus bar barrel is positioned between the two original bus bar barrels;
step 3, replacing the adsorbent in the adsorbent air chambers on the original bus-bar barrels at two sides, and sealing the adsorbent chambers after the replacement is finished;
and 4, injecting SF6 gas into the corresponding gas chamber of the newly added bus bar barrel on the expanded GIS interval.
Further, in the extension method of the box-divided GIS bus bar, in the step 2, splicing the newly added bus bar comprises the following steps:
constraining the corrugated pipe on the newly-added bus tube to a preset position, and meanwhile, placing a conducting rod in the newly-added bus tube;
hoisting the newly-added bus bar barrel to the butt joint part of the original bus bar barrels positioned at two sides, and installing a sealing piece on the flange surface of the newly-added bus bar barrel when the newly-added bus bar barrel is close to the original bus bar barrels at two sides in the horizontal direction;
and butting the conducting rod in the newly-added bus tube with the contact in the original bus tube, and fixing the butting surface of the newly-added bus tube and the original bus tube.
Further, in the extension method of the box-divided GIS bus tube, when the conducting rod in the newly added bus tube is butted with the contacts in the original bus tubes at two sides, the flange surfaces of the newly added bus tube and the original bus tubes at two sides are kept opposite.
Furthermore, in the extension method of the box-divided GIS bus tube, the corrugated pipe on the newly added bus tube is restrained to a preset position, and meanwhile, the inner wall and the flange of the newly added bus tube are cleaned.
Further, in the extension method of the box-divided GIS bus bar, in the step 2, when the extension of the full three-phase box-divided GIS bus bar is carried out, the newly added bus bar is spliced between the original bus bars on two sides from the phase A to the phase C.
Furthermore, in the extension method of the box-divided GIS bus-bar, in the step 3, when the adsorbent is replaced, the empty leakage time of the adsorbent is ensured to be less than or equal to 30 minutes.
Further, in the method for expanding the box-divided type GIS bus-bar, in the step 4, before SF6 gas is injected into the corresponding gas chamber of the newly added bus-bar at the expanded GIS interval, the gas chamber needs to be vacuumized.
Further, in the extension method of the box-divided GIS bus tube, in the step 2, when the current conduction cannot be ensured between the joint surfaces of the basin-type insulator and the flange in the newly added bus tube and the original bus tube, the original bus tube and the flange spliced by the newly added bus tube are connected by using a jumper wire, so that a good electrical path is ensured.
Further, in the extension method of the box-divided type GIS bus-bar, after the step 4, the method further includes:
and 5, detecting the leakage of the splicing points between the newly-added bus tube and the original bus tubes on the two sides, and carrying out micro-water analysis on the filled SF6 gas.
Further, in the extension method of the box-divided GIS bus-bar, the step 5 is followed by:
and 6, debugging the newly added bus bar barrel and the original bus bar barrels on the two sides so that the expanded GIS interval can normally run.
According to the method for expanding the box-divided GIS bus tube, the SF in the corresponding gas chamber in the original bus tube is subjected to expansion before the newly added bus tube is spliced6Gas is recovered, and SF is injected into the corresponding gas chamber again after the adsorbent in the original bus tube is replaced after the splicing of the newly added bus tube is finished6The process arrangement is reasonable, the working efficiency is improved, the splicing time of the bus tube is greatly shortened, the safety factor of operating personnel during working is improved, especially, the time for production and power utilization can be recovered in advance, the normal operation of the expanded GIS interval is ensured, and considerable economic benefits are created.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic flow chart of a method for expanding a box-type GIS bus bar according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a newly added bus bar in the extension method of the box-type GIS bus bar according to the embodiment of the present invention;
fig. 3 is a floor layout after the extension of the box-type GIS bus bar according to the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, the method for expanding the box-type GIS bus bar according to the embodiment of the invention comprises the following steps:
step S1, SF in the corresponding gas chamber in the original bus bar barrel on the GIS interval to be expanded6And (4) recovering the gas.
Specifically, because the bus bar barrel on the GIS interval is provided with a plurality of gas chambers, such as a breaker gas chamber, a disconnecting switch gas chamber and the like, each gas chamber is filled with SF6Insulating gas, when the bus bar barrel is expanded and installed, the seal cover of the isolating switch air chamber at the connecting part of the original GIS interval and the newly added bus bar barrel needs to be opened for splicing, and since SF6 gas belongs to asphyxiating gas and meanwhile, since the decomposition product generated under the action of electric arc for a long time has strong corrosivity and toxicity, the environment and the human body are harmed if the decomposition product is not properly treated, the SF is needed to be spliced before the newly added bus bar barrel is spliced6Gas is recycled, and in order to avoid the deformation and damage of the gas-isolating insulator between adjacent gas chambers caused by overlarge pressure difference in the gas recycling process, SF in the corresponding gas chamber is required to be recycled6The gas pressure drops to a reasonable range.
Obviously, before step S1, construction preparation needs to be madeFor example, the following steps may be referred to: firstly, confirming the power failure range and time; second, transacting the construction procedure; thirdly, all parts and accessories required by cleaning construction are counted to ensure no omission, for example: sealing rings, adsorbents, bolts, alcohol, and the like; preparing the implements and necessary safety devices required for the construction, e.g. SF6Air charging and discharging device, lever block, common tool and insulated railing.
Referring to fig. 2 and 3, in step S2, a new bus bar drum is spliced to two adjacent original bus bar drums at an end close to the respective gas chamber c, so that the new bus bar drum is located between the two original bus bar drums. In fig. 3, the middle section of each phase is a newly added bus bar cylinder a, the two ends of the newly added bus bar cylinder a are original bus bar cylinders b, the structures of the original bus bar cylinders and the newly added bus bar cylinders are the same, and the basin-type insulators positioned at the communication positions of the adjacent air chambers in each section of bus bar cylinder are used as separation points of the air chambers.
When the method is specifically implemented, the new bus tube splicing step comprises the following substeps:
and a substep S21, constraining the corrugated tube on the newly added bus tube to a preset position, and simultaneously placing the conducting rod in the newly added bus tube.
Particularly, before the concatenation, need open the closing cap of the original generating line section of thick bamboo of newly-increased generating line section of thick bamboo and both sides, adopt 2 restraints of restraint mechanism to put in place bellows 1 on the newly-increased generating line section of thick bamboo to insert in the original generating line section of thick bamboo b at both ends, simultaneously, will newly-increased the flange 3 and the inner wall sanitization of a generating line section of thick bamboo a, and will fix the conducting rod 4 of clean up in a newly-increased generating line section of thick bamboo temporarily.
And a substep S22, lifting the newly added bus bar barrel to the butt joint part of the original bus bar barrels positioned at two sides, and installing a sealing element on the flange surface of the newly added bus bar barrel when the newly added bus bar barrel is close to the original bus bar barrels positioned at two sides in the horizontal direction.
Particularly, can adopt the lifting means steadily to hang newly-increased bus section of thick bamboo and remove to the butt joint position of the original bus section of thick bamboo of both sides, when newly-increased bus section of thick bamboo is close to the flange face of bellows and the flange face of the original bus section of thick bamboo of one side apart from 300 in the horizontal direction and add 400mm, all scribble sealed glue and install O type circle on the flange face at this newly-increased bus section of thick bamboo both ends to realize subsequent sealed operation, do like this, can prevent in the concatenation operation process, make the conducting rod touch sealed glue, lead to sealed glue to drop.
And a substep S23, butting the conducting rod in the newly added bus tube with the contacts in the original bus tubes at two sides, and fixing the butting surfaces of the newly added bus tube and the original bus tubes at two sides.
Specifically, when the conducting rod in the newly-added bus tube is butted with the contacts in the original bus tube on two sides, the flange surfaces of the original bus tube and the newly-added bus tube are opposite to each other. More specifically, the operating personnel holds up the conducting rod through the one end of newly-increased generating line section of thick bamboo, makes the conducting rod just to the plum blossom contact in the original generating line section of thick bamboo, and the slow butt joint finishes the back, carries out the bolt fastening with the flange end of the one end that has the bellows with newly-increased generating line section of thick bamboo and original generating line section of thick bamboo to make the torsion of bolt reach the specified value. Furthermore, the expansion and contraction amplitude of the corrugated pipe can be adjusted through a restraint mechanism sleeved on the corrugated pipe on the newly added bus tube, so that the adjustment of the gap between every two adjacent GIS intervals 5 is realized.
After the substep S23 is completed, that is, after the original bus bar barrel and the newly added bus bar barrel on both sides are spliced, when the current conduction cannot be ensured between the newly added bus bar barrel and the joint surface of the basin-type insulator and the flange in the original bus bar barrel, the original bus bar barrel and the flange after the newly added bus bar barrel are spliced are connected by using a jumper wire, so as to ensure a good electrical path. Certainly, when the junction surface of the basin-type insulator with the metal grounding connection and the flange can ensure the electrical conduction, no jumper connection is additionally made between the flange pieces.
Referring to fig. 3, in step S2, when the full three-phase box-type GIS bus bars are spliced, the newly added bus bars are spliced between the original bus bars on both sides from the phase a to the phase C, so as to avoid mutual interference between the bus bars in each phase in the installation space during the extension of the bus bars.
And step S3, replacing the adsorbent in the adsorbent air chambers on the original bus-bar barrels at two sides, and sealing the adsorbent chambers after the replacement is finished.
Specifically, on the bus bar barrel, an adsorbent chamber is communicated with the breaker air chamber and the disconnector air chamber, so that the SF in the breaker air chamber and the disconnector air chamber is adsorbed by the adsorbent filled in the adsorbent chamber6And (3) drying the gas micro water to ensure the insulating property, opening the cover plate of the adsorbent air chamber when the adsorbent is replaced, taking out the original adsorbent, cleaning the adsorbent tank body, replacing the new adsorbent, smearing sealant on the flange surface of the adsorbent air chamber, and installing an O-shaped ring and then sealing the cover.
Furthermore, when the adsorbent is replaced, the air leakage time of the adsorbent is ensured to be less than or equal to 30 minutes.
Step S4, injecting SF into the corresponding gas chamber of the newly added bus bar barrel on the GIS interval after the expansion6A gas.
Specifically, SF is injected into a gas chamber of a newly added bus bar barrel on the GIS interval after the expansion6Before the gas is generated, the gas needs to be vacuumized. May use SF6The gas charging and discharging device carries out vacuum treatment.
In practice, SF is used6Before the gas charging and discharging device carries out vacuum treatment, whether the action of an electromagnetic valve of the gas charging and discharging device is reliable or not should be checked, and the phenomenon that vacuum pump oil is sucked to a GIS air chamber due to accidental power failure is prevented. During vacuum treatment, marking the vacuum state of each air chamber, and recording the numerical value of the vacuum degree in each time period; during the vacuum pumping, after the vacuum degree reaches 133.3Pa, the vacuum pumping is continued for 30 minutes to 1 hour, and then the next procedure can be carried out to fill SF6A gas. Filling SF6 gas within 2h after the final vacuum pressure value is finished; the inflation pressure should not be too high, so that the pointer of the pressure gauge should not shake and rise slowly, and the liquid gas should be prevented from being filled into the GIS. In addition, the air charging pipeline needs to be cleaned and vacuumized before air charging, and further, if the air charging is carried out at a low ambient temperature, a mode of heating the air cylinder outside the body (such as a heating blanket and hot water) can be adopted to accelerate the air charging speed.
After step S4, it may further includeStep S5, leak detection is carried out on the splicing points between the newly-added bus tube and the original bus tubes on the two sides, and the filled SF is detected6The gas was subjected to micro-water analysis.
Specifically, after the inflation is finished, all the connecting points and all the sealing flanges are wrapped by clean film paper, the wrapping time is 24 hours, and after 24 hours, all the connecting points and the seams of the sealing flanges are checked one by using a special leak detector to determine whether leakage points exist. For filled SF6The water content of the gas is measured, and the water content of the breaker gas chamber is generally ensured to be 150ppm, and the water content of other gas chambers is allowed to be 500 ppm. After the micro-water test is finished, the air chamber with air loss in the test is supplemented with air to the original pressure value.
After the step 5, a step S6 may be further included, in which the newly added bus bar and the original bus bars on both sides are debugged, so that the expanded GIS interval can operate normally.
Particularly, after the newly-added bus tube is installed, loop resistance, insulation resistance, bus voltage resistance and operation interlocking test need to be carried out on the bus tube, and the test standard meets the production requirement. Meanwhile, because the original bus bar barrel cannot be powered off, the test needs to be selectively carried out on the original bus bar barrel according to actual conditions.
It can be clearly seen from the above that, in the extension method of the box-type GIS bus bar provided in this embodiment, before the newly added bus bar is spliced, SF in the corresponding gas chamber in the original bus bar is added6Gas is recovered, and SF is injected into the corresponding gas chamber again after the adsorbent in the original bus tube is replaced after the splicing of the newly added bus tube is finished6The process arrangement is reasonable, the working efficiency is improved, the splicing time of the bus tube is greatly shortened, the safety factor of operating personnel during working is improved, especially, the rapid recovery of production power utilization is facilitated, the normal operation of the expanded GIS interval is ensured, and considerable economic benefits are created.
In summary, the extension method of the box-type GIS bus-bar barrel provided in the embodiment of the invention specifies the operation method of the operator by determining the sequence of each process and the control key point, improves the installation work efficiency and quality, greatly shortens the splicing time of the bus-bar barrel, can restore the production and power utilization time in advance, reduces the construction cost, and creates considerable economic benefits.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. The method for expanding the box-type GIS bus tube is characterized by comprising the following steps of:
step 1, SF in corresponding gas chambers in original bus bars on GIS intervals to be expanded6Recovering the gas;
step 2, splicing a newly-added bus bar barrel at one end, close to each gas chamber, of each two adjacent original bus bar barrels, so that the newly-added bus bar barrel is positioned between the two original bus bar barrels;
step 3, replacing the adsorbent in the adsorbent air chambers on the original bus-bar barrels at two sides, and sealing the adsorbent chambers after the replacement is finished;
step 4, injecting SF into the corresponding gas chamber of the newly added bus bar barrel on the GIS interval after the expansion6A gas.
2. The extension method of the box-type GIS bus bar barrel of claim 1, wherein the step 2 of splicing the newly added bus bar barrel comprises the following steps:
constraining the corrugated pipe on the newly-added bus tube to a preset position, and meanwhile, placing a conducting rod in the newly-added bus tube;
hoisting the newly-added bus bar barrel to the butt joint part of the original bus bar barrels positioned at two sides, and installing a sealing piece on the flange surface of the newly-added bus bar barrel when the newly-added bus bar barrel is close to the original bus bar barrels at two sides in the horizontal direction;
and butting the conducting rod in the newly-added bus tube with the contacts in the original bus tubes on two sides, and fixing the butting surfaces of the newly-added bus tube and the original bus tubes on two sides.
3. The method for expanding a box-type GIS bus bar according to claim 2, wherein when the conducting rod in the newly added bus bar is butted with the contact in the original bus bar at two sides, the flange surfaces of the original bus bar and the newly added bus bar are kept opposite.
4. The method for expanding a box-type GIS bus bar according to claim 2, wherein the bellows on the newly added bus bar is restrained to a predetermined position while the inner wall and the flange of the newly added bus bar are cleaned.
5. The method for expanding a box-type GIS bus bar according to claim 1, wherein in step 2, when the full three-phase box-type GIS bus bar is expanded, the newly added bus bar is spliced between the original bus bars on both sides from phase A to phase C.
6. The method for expanding the box-type GIS bus bar according to claim 1, wherein in step 3, the time for the adsorbent to leak out is ensured to be less than or equal to 30 minutes when the adsorbent is replaced.
7. The method for expanding a box-type GIS bus bar according to claim 1, wherein in step 4, SF is injected into the corresponding gas chamber of the newly added bus bar on the GIS interval after expansion6Before the gas is generated, the gas needs to be vacuumized.
8. The method for expanding a box-type GIS bus bar according to claim 1, wherein in the step 2, when current conduction cannot be guaranteed between the joint surfaces of the flanges and the basin-type insulator in the newly added bus bar and the original bus bar, the original bus bar and the flanges after splicing the newly added bus bar are connected by using a jumper wire to guarantee a good electrical path.
9. The method for expanding a box-type GIS bus-bar according to claim 1, characterized in that after the step 4, the method further comprises:
step 5, detecting the splicing points between the newly-added bus tube and the original bus tubes on the two sides, and filling SF6The gas was subjected to micro-water analysis.
10. The method for expanding a box-type GIS bus bar according to claim 9, wherein the step 5 is followed by further comprising:
and 6, debugging the newly added bus bar barrel and the original bus bar barrels on the two sides so that the expanded GIS interval can normally run.
CN202111216331.5A 2021-10-19 2021-10-19 Extension method of box-type GIS busbar barrel Pending CN113964707A (en)

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Application Number Priority Date Filing Date Title
CN202111216331.5A CN113964707A (en) 2021-10-19 2021-10-19 Extension method of box-type GIS busbar barrel

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Application Number Priority Date Filing Date Title
CN202111216331.5A CN113964707A (en) 2021-10-19 2021-10-19 Extension method of box-type GIS busbar barrel

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004229413A (en) * 2003-01-23 2004-08-12 Nissin Electric Co Ltd Conductor connector of gas insulated switchgear
CN101582568A (en) * 2009-06-24 2009-11-18 河南平高电气股份有限公司 Butting unit for GIS equipment and method thereof
CN201438615U (en) * 2009-06-24 2010-04-14 河南平高电气股份有限公司 Butting device for GIS equipment
CN102957104A (en) * 2011-08-18 2013-03-06 河南省电力公司郑州供电公司 Improved method of transformer and GIS (gas insulated switchgear) power distribution device flexible connection structure
CN107895900A (en) * 2017-09-19 2018-04-10 国家电网公司 Gate framework sedimentation breaker method processing HGIS equipment leakage defect methods

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004229413A (en) * 2003-01-23 2004-08-12 Nissin Electric Co Ltd Conductor connector of gas insulated switchgear
CN101582568A (en) * 2009-06-24 2009-11-18 河南平高电气股份有限公司 Butting unit for GIS equipment and method thereof
CN201438615U (en) * 2009-06-24 2010-04-14 河南平高电气股份有限公司 Butting device for GIS equipment
CN102957104A (en) * 2011-08-18 2013-03-06 河南省电力公司郑州供电公司 Improved method of transformer and GIS (gas insulated switchgear) power distribution device flexible connection structure
CN107895900A (en) * 2017-09-19 2018-04-10 国家电网公司 Gate framework sedimentation breaker method processing HGIS equipment leakage defect methods

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