CN202600103U - Independent metal tip defect model for partial discharge test of gas insulated switchgear (GIS) - Google Patents
Independent metal tip defect model for partial discharge test of gas insulated switchgear (GIS) Download PDFInfo
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- CN202600103U CN202600103U CN 201220281988 CN201220281988U CN202600103U CN 202600103 U CN202600103 U CN 202600103U CN 201220281988 CN201220281988 CN 201220281988 CN 201220281988 U CN201220281988 U CN 201220281988U CN 202600103 U CN202600103 U CN 202600103U
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 33
- 239000002184 metal Substances 0.000 title claims abstract description 33
- 230000007547 defect Effects 0.000 title claims abstract description 25
- 238000009413 insulation Methods 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000005684 electric field Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 abstract 4
- 239000010959 steel Substances 0.000 abstract 4
- 239000007787 solid Substances 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 12
- 238000009826 distribution Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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Abstract
The utility model discloses an independent metal tip defect model for a partial discharge test of a GIS. The model comprises an upper polar plate, a lower polar plate, an insulation cylinder and a steel pin, wherein the upper polar plate, the lower polar plate and the insulation cylinder form a tank for storing high-pressure SF6 gas, the upper polar plate is fixed on the upper end face of the insulation cylinder, the lower polar plate is fixed on the lower end face of the insulation cylinder, and the upper polar plate and the lower polar plate are perpendicular to the central axis of the insulation cylinder; and the tail of the steel pin is fixed with the upper polar plate, the tip point of the steel pin faces vertically towards the lower polar plate, and the steel pin and the lower polar plate form a pin plate structure. According to the model, the high-pressure SF6 gas equivalent to the GIS entity can be born, electric field distortion caused by the metal tip defect in the solid GIS is simulated, and the model has the advantages that the starting voltage for discharge is low, the interval of the pin plate is adjustable, the discharge process is visualized, and the like.
Description
Technical field
The utility model relates to the high voltage power transmission and transforming technology, relates in particular to a kind of combined electrical apparatus partial-discharge test with independent metal tip defect model, and the electric field distortion in order to insulation defect in the simulation combined electrical apparatus causes produces local discharge signal.
Background technology
SF
6Gas insulated combined electrical equipment (is called for short combined electrical apparatus; Gas Insulated Switchgear/GIS) have that spatial volume is little, floor area is few, be not affected by the external environment, safe and reliable to operation, help advantages such as environmental protection, flexible configuration and maintenance are simple, the time between overhauls(TBO) is long, since coming out, just obtained widespread use.But, because GIS is large-scale all-closed combined structure, just need long servicing time in case break down, cause heavy losses.Therefore, before GIS breaks down, detect and judge that its built-in electrical insulation defect situation just seems particularly important.
The metal tip defective is one of insulation defect type the most common among the GIS; Be that GIS is in production, installation and maintenance process; Metal tip defectives such as the wedge angle that produces in the metal parts such as high-pressure conductor, shell and fastening structure, burr, metal tip defective can cause field intensity distortion in the GIS cavity, and then reduce the voltage tolerance level of GIS; Under the superpotential effect, the GIS insulation breakdown be possibly cause, enormous economic loss and bad social influence caused.
Field intensity distorted near the metal tip defective can cause defective, and produced local discharge signal.Through detecting discharge signal, and analyze its characteristic and help to carry out defect type identification among the GIS, location and hazard level evaluation work, avoid the generation of accident.
Be the local discharge signal that research metal tip defective produces, at present domestic and international research institution artificially is provided with the metal tip defective usually and carries out correlation test in the GIS entity.Yet; In the GIS entity, carry out partial discharge test relate to bleed, vacuumize, a series of test procedures such as defective installation, inflation; Test period is long, and has that trial voltage is high, occupied ground big, can't simulate the deficiencies such as dielectric breakdown test that metal tip causes.Therefore, be necessary design and make independently metal tip defect model, and require that it has that firing potential is low, needle plate is apart from scalable and realizes characteristics such as discharge process is visual.
The utility model content
Goal of the invention: in order to overcome the deficiency that exists in the prior art; The utility model provides a kind of combined electrical apparatus partial-discharge test with independent metal tip defect model; Can independently be used for metal tip partial discharge test (need not the GIS entity), have the test period short, occupied ground is little, firing potential is low, needle plate is apart from characteristics such as scalable and discharge process be visual.
Technical scheme: for solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
The combined electrical apparatus partial-discharge test comprises top crown, bottom crown, insulating concrete cylinder and draw point with independent metal tip defect model; Said top crown, bottom crown and insulating concrete cylinder constitute storage high pressure SF
6The tank body of gas, wherein top crown is fixed on the upper surface of insulating concrete cylinder, and bottom crown is fixed on the lower surface of insulating concrete cylinder, and top crown is all vertical with the axis of insulating concrete cylinder with bottom crown; The backshank and the top crown of said draw point are fixed, and the needle point of draw point is vertically towards bottom crown, and draw point and bottom crown constitute needle plate structure.
Preferably, this model also comprises Tiebar structure, and the two ends of said Tiebar structure are fixed with top crown and bottom crown respectively, and insulating concrete cylinder is pressed between top crown and the bottom crown.A kind of preferred structure of Tiebar structure does, it comprises pull bar and nut, and top crown is provided with through hole, and bottom crown is provided with threaded hole; The tail end of said pull bar is threaded with the threaded hole of bottom crown, after the head end of pull bar passes the through hole of top crown, is connected with nut thread.The preferred material of said pull bar is a nylon material, and this is because the hardness of nylon material is higher.The preferred number of said Tiebar structure is more than the quadruplet, evenly to be arranged in outside the insulating concrete cylinder.
In order to guarantee the sealing of tank body, between said top crown and the insulating concrete cylinder, seal through the O RunddichtringO respectively between bottom crown and the insulating concrete cylinder.
Preferably, said insulating concrete cylinder is a pmma material; Said top crown and bottom crown are aluminum alloy materials.
Preferably, this model also comprises copper rod, and said copper rod runs through top crown, and is electrically connected, seals through the O RunddichtringO through fixing the realization simultaneously of helicitic texture with top crown, and the end that copper rod stretches in the tank body is provided with the draw point fixed sturcture, such as helicitic texture.This structure can be regulated the spacing of needle plate structure under the bubble-tight condition of assurance, and when specifically regulating, the rotation copper rod is because helicitic texture changes its length that stretches in the body.
Preferably, said draw point is positioned on the axis of insulation pipe.
In the said structure, the draw point of use all need adopt through microscope and screen, so as to select that radius-of-curvature is little, the draw point of smooth surface, no burr, no bifurcated.
Beneficial effect: the combined electrical apparatus partial-discharge test that the utility model provides can be born the high pressure SF suitable with the GIS entity with independent metal tip defect model
6Gas, the caused electric field distortion of metal tip defective in the simulation GIS entity, through the Electric Field Distribution simulation analysis, the metal tip defective in this case and the GIS entity has equivalence; Because the firing potential of this case is low, and can under lower voltage, simulate the insulation breakdown process, greatly reduces the insulating requirements of test to equipment such as transformer, coupling capacitances, has reduced equipment size and floor area; Adopt the bright organic glass material of full impregnated insulating concrete cylinder, make discharge process can realize whole process supervision; In addition, can easily draw point be taken out after the test, be convenient to check the surface deterioration situation of test back draw point; Simultaneously, because the spacing of needle plate structure is adjustable, during test, can select different spacing of needle and plate as required, so that simulate dissimilar electric discharge phenomena.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of a kind of instantiation of the utility model;
Fig. 3 be among Fig. 2 A to cut-open view;
Fig. 4 is the microphoto of draw point;
Fig. 5 is near the electric-field intensity distribution comparison diagram of similar defective near electric-field intensity distribution of draw point and the GIS entity;
Embodiment
Below in conjunction with accompanying drawing the utility model is done explanation further.
As Fig. 1, Fig. 2, shown in Figure 3 for the combined electrical apparatus partial-discharge test with independent metal tip defect model, comprise that top crown 1, bottom crown 2, insulating concrete cylinder 3,6 overlap Tiebar structure, copper rod 6 and draw points 5; Said Tiebar structure comprises pull bar pull bar 4 and nut 8; Wherein top crown 1 is an aluminum alloy material with bottom crown 2, and insulating concrete cylinder 3 is the transparent organic glass material, and pull bar 4 is a nylon material; Said bottom crown 2 is provided with and charges and discharge gas passage 9, for the ease of to charging and discharging the management of gas, charges and discharge gas passage 9 and is provided with unidirectional reverse checkvalve.
Said top crown 1, bottom crown 2 and insulating concrete cylinder 3 constitute storage high pressure SF through Tiebar structure
6The tank body of gas, wherein top crown 1 is fixed on the upper surface of insulating concrete cylinder 3, and bottom crown 2 is fixed on the lower surface of insulating concrete cylinder 3, and top crown 1 is all vertical with the axis of insulating concrete cylinder 3 with bottom crown 2; Top crown 1 is provided with through hole, and bottom crown 2 is provided with threaded hole; The tail end of said pull bar 4 is threaded with the threaded hole of bottom crown 2, after the head end of pull bar 4 passes the through hole of top crown 1, is threaded with nut 8, and insulating concrete cylinder 3 is pressed between top crown 1 and the bottom crown 2; In order to guarantee the sealing of tank body, between top crown 1 and the insulating concrete cylinder 3, seal through an O RunddichtringO 7 respectively between bottom crown 2 and the insulating concrete cylinder 3; For the ease of the installation of an O RunddichtringO 7, with bottom crown 2 an O RunddichtringO 7 places are installed at top crown 1 and are provided with the groove of placing an O RunddichtringO 7.
Said copper rod 6 runs through top crown 1, and realizes simultaneously being electrically connected, seals through the 2nd O RunddichtringO 10 through helicitic texture is fixing with top crown 1, and the end that copper rod 6 stretches in the tank body is provided with draw point fixed sturcture (such as helicitic texture); Said draw point 5 is positioned on the axis of insulating concrete cylinder 3; And the backshank of draw point 5 is fixed on the draw point fixed sturcture and with copper rod 6 and realizes being electrically connected; The needle point of draw point 5 is vertically towards bottom crown 2, and draw point 5 constitutes needle plate structure with bottom crown 2, is used to produce the electric field distortion phenomenon; Through rotation copper rod 6, can guarantee to make the spacing of needle plate have controllability under the bubble-tight condition.
In this case, an O RunddichtringO 7 and the 2nd O RunddichtringO 10 adopt the rubber material, and all parts all require smooth surface, no burr, flawless.
Concrete, the diameter of top crown 1 and bottom crown 2 is 150mm in this case, thickness is 20mm; Insulating concrete cylinder 3 external diameters are that 120mm, internal diameter are 110mm, highly are 150mm; Top crown 1 all has the groove that the degree of depth is 6mm with intersection, the bottom crown 2 of insulating concrete cylinder 3 with the intersection of insulating concrete cylinder 3, is used to place an O RunddichtringO 7; The diameter of pull bar 4 is 8mm, and its degree of depth of inserting bottom crown 2 is 10mm; The diameter of copper rod 6 is 6mm, and its upper end uses the 2nd O RunddichtringO 10 and the combination of fine thread to seal with top crown 1 junction, is used to regulate the spacing of draw point 5 and bottom crown 2.
For the firing potential that makes needle plate structure low; And simulation needle plate disruptive discharge test under lower voltage; Through using microscope that draw point 5 is screened, require the radius-of-curvature of draw point 5 little and needle point is smooth, no burr, bifurcated when making up defect model.The microphoto of the draw point 5 that filters out is as shown in Figure 4, and wherein needle point equivalence radius-of-curvature is 39.95 μ m.
Instance to based on above-mentioned parameter makes an experiment, and find through test: when not adding draw point 5, the partial discharge inception voltage of tank body is greater than 80kV; After adding draw point 5, the shelf depreciation firing potential of tank body is 9kV, and voltage breakdown is 32kV.Show that after preferred, present embodiment can be carried out the GIS partial discharge test under lower trial voltage, can effectively reduce the insulating requirements of test to equipment such as transformer, coupling capacitances, reduces equipment size and floor area.
Shown in Figure 5 is near the Electric Field Distribution situation of draw point 5 needle points and the metal spine that reaches the same radius-of-curvature that is provided with among GIS Electric Field Distribution situation comparison diagram on every side of present embodiment, and wherein transverse axis is depicted as the distance from needle point, and the longitudinal axis is the value of electric field intensity.The needle plate of present embodiment distance is 4mm in the test, and applying voltage is 15.5kV, and the height of the metal spine among the GIS is 2mm (radius-of-curvature is identical with present embodiment draw point 5), and applying voltage is 128kV.Remove the difference of electric field intensity absolute value, both electric field intensity are with apart from the variable in distance property class of needle point seemingly, show that the said needle plate structure of present embodiment can effectively simulate the caused electric field distortion phenomenon of defective such as spine in the GIS entity.
The instance of this case through partial discharge test repeatedly, phenomenons such as gas leakage, discharge instability do not occurred.
The above only is the preferred implementation of the utility model; Be noted that for those skilled in the art; Under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (10)
1. the combined electrical apparatus partial-discharge test is with independent metal tip defect model, and it is characterized in that: this model comprises top crown, bottom crown, insulating concrete cylinder and draw point; Said top crown, bottom crown and insulating concrete cylinder constitute the tank body of storage high pressure SF6 gas, and wherein top crown is fixed on the upper surface of insulating concrete cylinder, and bottom crown is fixed on the lower surface of insulating concrete cylinder, and top crown is all vertical with the axis of insulating concrete cylinder with bottom crown; The backshank and the top crown of said draw point are fixed, and the needle point of draw point is vertically towards bottom crown, and draw point and bottom crown constitute needle plate structure.
2. combined electrical apparatus partial-discharge test according to claim 1 is with independent metal tip defect model; It is characterized in that: this model also comprises Tiebar structure; The two ends of said Tiebar structure are fixed with top crown and bottom crown respectively, and insulating concrete cylinder is pressed between top crown and the bottom crown.
3. combined electrical apparatus partial-discharge test according to claim 2 is with independent metal tip defect model, and it is characterized in that: said Tiebar structure comprises pull bar and nut, and top crown is provided with through hole, and bottom crown is provided with threaded hole; The tail end of said pull bar is threaded with the threaded hole of bottom crown, after the head end of pull bar passes the through hole of top crown, is connected with nut thread.
4. combined electrical apparatus partial-discharge test according to claim 3 is with independent metal tip defect model, and it is characterized in that: said pull bar is a nylon material.
5. combined electrical apparatus partial-discharge test according to claim 2 is with independent metal tip defect model, and it is characterized in that: the number of said Tiebar structure is more than the quadruplet, and evenly is arranged in outside the insulating concrete cylinder.
6. combined electrical apparatus partial-discharge according to claim 1 and 2 test is characterized in that with independent metal tip defect model: between said top crown and the insulating concrete cylinder, seal through the O RunddichtringO respectively between bottom crown and the insulating concrete cylinder.
7. combined electrical apparatus partial-discharge test according to claim 1 and 2 is with independent metal tip defect model, and it is characterized in that: said insulating concrete cylinder is a pmma material.
8. combined electrical apparatus partial-discharge test according to claim 1 and 2 is with independent metal tip defect model, and it is characterized in that: said top crown and bottom crown are aluminum alloy materials.
9. combined electrical apparatus partial-discharge test according to claim 1 and 2 is with independent metal tip defect model; It is characterized in that: this model also comprises copper rod; Said copper rod runs through top crown; And with top crown through helicitic texture fixing realize simultaneously being electrically connected, through the sealing of O RunddichtringO, copper rod stretches into the interior end of tank body and is provided with the draw point fixed sturcture.
10. combined electrical apparatus partial-discharge test according to claim 1 and 2 is with independent metal tip defect model, and it is characterized in that: said draw point is positioned on the axis of insulation pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220281988 CN202600103U (en) | 2012-06-14 | 2012-06-14 | Independent metal tip defect model for partial discharge test of gas insulated switchgear (GIS) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220281988 CN202600103U (en) | 2012-06-14 | 2012-06-14 | Independent metal tip defect model for partial discharge test of gas insulated switchgear (GIS) |
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| CN202600103U true CN202600103U (en) | 2012-12-12 |
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| CN 201220281988 Expired - Lifetime CN202600103U (en) | 2012-06-14 | 2012-06-14 | Independent metal tip defect model for partial discharge test of gas insulated switchgear (GIS) |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103439676A (en) * | 2013-08-08 | 2013-12-11 | 国家电网公司 | UHF sensor sensitivity detection method |
| CN103605051A (en) * | 2013-11-19 | 2014-02-26 | 国家电网公司 | Gas insulated metal tip defect device for partial discharge test under impact voltage |
| CN104049186A (en) * | 2014-06-04 | 2014-09-17 | 国家电网公司 | Adjustable needle plate defect model for high-voltage tests |
| CN104569766A (en) * | 2015-01-21 | 2015-04-29 | 国家电网公司 | GIS equipment high frequency partial discharge testing system |
| CN106918766A (en) * | 2017-04-06 | 2017-07-04 | 中国南方电网有限责任公司电网技术研究中心 | A kind of device of Simulated GlS inner housing spine |
| CN106990335A (en) * | 2017-03-23 | 2017-07-28 | 国家电网公司 | The test model of the sophisticated shelf depreciations of GIS under simulation slightly non-uniform field background |
| CN107688141A (en) * | 2017-10-20 | 2018-02-13 | 广东电网有限责任公司电力科学研究院 | The interface performance test system and method for a kind of composite insulator |
| CN109188113A (en) * | 2018-10-18 | 2019-01-11 | 华北电力大学 | The device and method of simulated environment test is carried out for simulating uniform ion flow field |
| CN110824313A (en) * | 2019-11-25 | 2020-02-21 | 深圳供电局有限公司 | Defect simulation structure of closed gas insulated switchgear |
| CN111751688A (en) * | 2020-06-17 | 2020-10-09 | 广东电网有限责任公司 | Partial discharge simulation device for adjusting gap of needle plate with electricity |
| CN114047414A (en) * | 2021-11-11 | 2022-02-15 | 国网上海市电力公司 | Be used for interior defect test simulation of GIS air chamber with convenient change structure |
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2012
- 2012-06-14 CN CN 201220281988 patent/CN202600103U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103439676B (en) * | 2013-08-08 | 2015-12-09 | 国家电网公司 | A kind of method that UHF sensor sensitivity detects |
| CN103439676A (en) * | 2013-08-08 | 2013-12-11 | 国家电网公司 | UHF sensor sensitivity detection method |
| CN103605051A (en) * | 2013-11-19 | 2014-02-26 | 国家电网公司 | Gas insulated metal tip defect device for partial discharge test under impact voltage |
| CN103605051B (en) * | 2013-11-19 | 2015-12-02 | 国家电网公司 | The partial discharge test most advanced and sophisticated defect device of gas-insulated metal under surge voltage |
| CN104049186A (en) * | 2014-06-04 | 2014-09-17 | 国家电网公司 | Adjustable needle plate defect model for high-voltage tests |
| CN104569766A (en) * | 2015-01-21 | 2015-04-29 | 国家电网公司 | GIS equipment high frequency partial discharge testing system |
| CN106990335A (en) * | 2017-03-23 | 2017-07-28 | 国家电网公司 | The test model of the sophisticated shelf depreciations of GIS under simulation slightly non-uniform field background |
| CN106918766B (en) * | 2017-04-06 | 2023-09-15 | 南方电网科学研究院有限责任公司 | Device for simulating spines of GIS inner shell |
| CN106918766A (en) * | 2017-04-06 | 2017-07-04 | 中国南方电网有限责任公司电网技术研究中心 | A kind of device of Simulated GlS inner housing spine |
| CN107688141A (en) * | 2017-10-20 | 2018-02-13 | 广东电网有限责任公司电力科学研究院 | The interface performance test system and method for a kind of composite insulator |
| CN107688141B (en) * | 2017-10-20 | 2023-12-29 | 广东电网有限责任公司电力科学研究院 | Interface of composite insulator Performance test system and method |
| CN109188113A (en) * | 2018-10-18 | 2019-01-11 | 华北电力大学 | The device and method of simulated environment test is carried out for simulating uniform ion flow field |
| CN110824313A (en) * | 2019-11-25 | 2020-02-21 | 深圳供电局有限公司 | Defect simulation structure of closed gas insulated switchgear |
| CN110824313B (en) * | 2019-11-25 | 2022-04-15 | 深圳供电局有限公司 | Defect simulation structure of closed gas insulated switchgear |
| CN111751688A (en) * | 2020-06-17 | 2020-10-09 | 广东电网有限责任公司 | Partial discharge simulation device for adjusting gap of needle plate with electricity |
| CN114047414A (en) * | 2021-11-11 | 2022-02-15 | 国网上海市电力公司 | Be used for interior defect test simulation of GIS air chamber with convenient change structure |
| CN114047414B (en) * | 2021-11-11 | 2024-04-02 | 国网上海市电力公司 | Be used for defect test simulation in GIS air chamber to use convenient change structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model |
Correction item: Patentee Correct: Electric Power Research Institute of Jiangsu electric power company|210029 Fenghuang West Street, Jiangsu, Nanjing 243, China|Jiangsu electric power company, national Power Grid Corp False: Jiangsu electric power test & Research Institute Co., Ltd.|210029 Fenghuang West Street, Jiangsu, Nanjing, 243|Jiangsu electric power company, national Power Grid Corp Number: 50 Page: The title page Volume: 28 |
|
| CU03 | Publication of corrected utility model |
Correction item: Patentee Correct: Electric Power Research Institute of Jiangsu electric power company|210029 Fenghuang West Street, Jiangsu, Nanjing 243, China|Jiangsu electric power company, national Power Grid Corp False: Jiangsu electric power test & Research Institute Co., Ltd.|210029 Fenghuang West Street, Jiangsu, Nanjing, 243|Jiangsu electric power company, national Power Grid Corp Number: 50 Volume: 28 |
|
| ERR | Gazette correction |
Free format text: CORRECT: PATENTEE; FROM: JIANGOU PROVINCIAL POWER TEST INST CO., LTD.:210029 NANJING, JIANGSU PROVINCE; JIANGSU ELECTRIC POWER COMPANY, STATE ELECTRIC NET CROP. TO: ELECTRIC POWER RESEARCH INSTITUTE OF JIANGSU ELECTRIC POWER COMPANY:210029 NANJING, JIANGSU PROVINCE; JIANGSU ELECTRIC POWER COMPANY, STATE ELECTRIC NET CROP. |
|
| RECT | Rectification | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |