CN2574066Y - In-situ mutual inductor checking device - Google Patents
In-situ mutual inductor checking device Download PDFInfo
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- CN2574066Y CN2574066Y CN 02279384 CN02279384U CN2574066Y CN 2574066 Y CN2574066 Y CN 2574066Y CN 02279384 CN02279384 CN 02279384 CN 02279384 U CN02279384 U CN 02279384U CN 2574066 Y CN2574066 Y CN 2574066Y
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- mutual inductor
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Abstract
The utility model relates to a mutual inductor site check device, which is composed of a square frame with a wheel, a standard mutual inductor square box body, a square check meter box body, a square load box body and a square voltage regulating power source box body. The mutual inductor site check device can exactly and quickly check a current mutual inductor from 75 A to 600A of primary current of the exact stage of 0.2 stage or under 0.2 stage on site. The utility model has the advantages of small volume and convenient transportation, and is compact integration with the functions of a mutual inductor, a check meter, a load box and a voltage regulator. The mutual inductor site check device reduces the workload of primary and secondary wiring of the standard current mutual inductor, and the transformation ratio of the standard mutual inductor can be switched by a switch simultaneously. The voltage regulator has two kinds of regulating mode of coarse regulation and fine regulation, and voltage regulation speed and regulation fineness can be organically bonded. The mutual inductor site check device can protect circuits for complete operation, and people can be at ease. The mutual inductor site check device has load extended function, and can enhance the check speed on site. The utility model does not need to be disassembled the integration for check, and can realize single component check by simple disassembly.
Description
Technical field
The utility model relates to a kind of mutual inductor on site calibration equipment that is used for the verification of electric system mutual inductor on site.
Background technology
In mutual inductor on site verification work, standard mutual inductor separates with tester and operator's console, and the workload that standard mutual inductor once reaches secondary connection is big, and causes wiring error, inefficiency easily; And existing monoblock type transducer check device all is to serve the test experience chamber, and voltage regulation of electric power sources partly uses is two pressure regulators, and the big difficult of whole device volume can't satisfy the needs of field-checking.
Summary of the invention
The purpose of this utility model provides a kind of all-in-one-piece mutual inductor on site calibration equipment, and its volume handling operation is convenient, and wiring is simple to operate easily, is convenient to censorship, can finish mutual inductor on site verification work accurately and quickly.
Concrete scheme of the present utility model is: be made up of stage body 1, band current lifting device standard mutual inductor 2, tester 3, load box 4, voltage controller power source 5, stage body 1 is the square framework of belt wheel, other four separate equipment all are square box, the panel two ends of standard mutual inductor square box 2, tester square box 3 and load box square body 4 all are useful on the activity handle 6 that proposes casing, and above-mentioned four square box are fixed in the square framework 1 of belt wheel compactly by the screw on the panel; Have two tested mutual inductor secondary terminal K1 and K2, two external voltage controller power sources to import terminal S1 and S2, an on-the-spot ground connection terminal G on the frame of stage body 1 end face, the side of stage body 1 has one to be convenient to the Side door that wiring is used; No-load voltage ratio change-over switch KG4, polarity terminal L, the low nonpolar terminal L1 of primary current and the nonpolar terminal L2 of higher primary current are arranged on standard mutual inductor square box 2 panels; There are little LPT T, liquid crystal display S, computer interconnection to connect D and operation push-button on tester square box 3 panels; Secondary load selector switch KG5 is arranged on load box square body 4 panels; Power switch KG0, supply socket P, interior accent investigation mission outside the city or town switch KG1, coarse adjustment fine tuning switch KG2 and pressure regulator handle B are arranged on voltage controller power source case square body 5 panels; Standard mutual inductor current terminal contact T0 and tested transformer current terminal TX, difference stream terminal K and D, reference voltage terminal a and x, ground connection terminal G1 are arranged on the side of tester square box 3; The input supply socket P of voltage controller power source case square body 5 connects the 220V power supply, two output terminals of voltage controller power source case square body 5 are received a secondary input end of standard mutual inductor square box 2, the difference stream terminal K of the secondary two output termination tester square box 3 of standard mutual inductor square box 2 and standard mutual inductor current terminal contact T0 are as the input of tester, the difference that tested mutual inductor secondary terminal K1 connects on tester square box 3 sides on the stage body 1 end face frame flows the input of terminal K as tester, tested mutual inductor secondary terminal K2 connects the input end of load box square body 4, and the output of load box square body 4 meets tested transformer current terminal TX on the tester square box 3 as the input of tester.
Above-mentioned mutual inductor on site calibration equipment, its standard mutual inductor square box 2 is by forming from up-flow standard mutual inductor CT and no-load voltage ratio change-over switch KG4, no-load voltage ratio change-over switch KG4 is the multidigit toggle switch, one secondary input end of standard mutual inductor square box 2 promptly from up-flow standard mutual inductor CT from up-flow input end V1 and V2, terminal three an ends output from up-flow standard mutual inductor CT meets polarity terminal L one time, low nonpolar terminal L1 of primary current and the nonpolar terminal L2 of higher primary current, export first termination difference stream terminal K from up-flow standard mutual inductor CT secondary, export other multiterminal from up-flow standard mutual inductor CT secondary and connect many grades of no-load voltage ratio change-over switch KG4, the public termination standard mutual inductor current terminal contact T0 of no-load voltage ratio change-over switch KG4.
Above-mentioned mutual inductor on site calibration equipment, a polarity terminal L on its standard mutual inductor square box 2, the low nonpolar terminal L1 of primary current or the nonpolar terminal L2 of higher primary current can cut up with a hay cutter 7 external tested straight-through current transformers by current knife.
Above-mentioned mutual inductor on site calibration equipment, its voltage regulation of electric power sources case square body 5 is by supply socket P, power switch KG0, limit switch KG3, coarse adjustment fine tuning switch KG2, combined floodgate pilot relay J1, combined floodgate pilot relay normally opened contact J1-1, combined floodgate pilot relay normally closed contact J1-2, coarse adjustment pilot relay J2, coarse adjustment pilot relay normally opened contact J2-1, the double-throw contact J2-2 of coarse adjustment pilot relay, fine tuning pilot relay J3, fine tuning pilot relay normally closed contact J3-1, pressure regulator TYQ, isolation transformer PT, interior investigation mission outside the city or town switch KG1 of accent and pressure regulator handle B form, limit switch KG3 is installed in pressure regulator TYQ zero-bit position, its moving contact mechanical effect limit switch KG3 closure when pressure regulator TYQ returns zero, power switch KG0 exports an end and holds by importing A to pressure regulator TYQ through combined floodgate pilot relay normally opened contact J1-1, and receive pressure regulator TYQ input X end through combined floodgate pilot relay J1 again through limit switch KG3 and combined floodgate pilot relay normally closed contact J1-2, and through coarse adjustment position that coarse adjustment pilot relay normally opened contact J2-1 receives coarse adjustment fine tuning switch KG2, the power switch KG0 output other end directly is connected to pressure regulator TYQ input X end, and the fine tuning position of receiving coarse adjustment fine tuning switch KG2 through fine tuning pilot relay J3, and through the coarse adjustment position that fine tuning pilot relay normally closed contact J3-1 and coarse adjustment pilot relay J2 receive coarse adjustment fine tuning switch K62, the input end of combined floodgate pilot relay J1 and pressure regulator TYQ input A end short circuit; The input end of the output termination isolation transformer PT of pressure regulator TYQ, the output of isolation transformer PT has three ends, wherein two ends a2 and a1 transfer the interior positioning NJa of investigation mission outside the city or town switch KG1 in the double-throw contact of coarse adjustment pilot relay J2-2 is connected to, and transfer the interior positioning NJx of investigation mission outside the city or town switch KG1 in other end x is connected to; The interior outer positioning Wja of investigation mission outside the city or town switch KG1 and the WJx of transferring is connected to external voltage controller power source input terminal S1 and S2 on square framework 1 frame of belt wheel.
Adopt such scheme; the primary current of 0.2 grade of on-site proving accurately and quickly and following accuracy rating is the current transformer of 7 5A～600A; its volume handling operation is convenient; collect mutual inductor, tester, Burden box, pressure regulator in the one of compactness; reduced standard current transformer once with the workload of secondary connection; pass through the no-load voltage ratio of switch switching standards mutual inductor simultaneously; pressure regulator has coarse adjustment and two kinds of regulative modes of fine tuning; pressure regulation speed and adjusting fineness organically combine; protection circuit complete operation is relieved, has improved the speed of test at the scene.Both can dismantle whole censorship, but single-piece censorship behind the disassembled simply again.
Description of drawings
Fig. 1 is the stereoscopic device figure of the utility model most preferred embodiment;
Fig. 2 is the utility model circuit theory diagrams;
Fig. 3 is current transformer measuring principle figure;
Fig. 4 is the voltage measuring transformer schematic diagram.
Among Fig. 1, all devices in this device all has independence, earlier band current lifting device standard mutual inductor square box 2, tester square box 3, load box square body 4 is placed on the position of oneself one by one, tighten four dog screws separately then, for decorating and fixing with setting up escutcheon 8 again, tighten four screws on both sides, open the side door of stage body 1, the stage body line is pressed label and standard mutual inductor square box 2, tester square box 3, binding post on load box square body 4 and voltage controller power source case square body 5 and tester square box 3 sides shuts side door to joining.For convenient carrying protection operating surface device, can also add case lid 9 above the escutcheon 8.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified:
When this device uses at the scene, straight-through current transformer can be placed on the primary current cutter hand hay cutter 7, corresponding the joining of K1, K2 (polarity can not connect instead) of secondary terminal K1 on the square framework 1 end face frame of belt wheel and K2 and tested current transformer, non-straight-through current transformer, primary connection adopts big current lead, and secondary connection is the same; According to the primary current size of tested current transformer, the positions of selecting current knife hand hay cutter 7 to place, be fixed on " L " and " L1 (75A～200A) " or be fixed on " L " and " L2 (250A～600A) " binding post on; And no-load voltage ratio change-over switch KG4 on standard mutual inductor case 2 panels placed tested current transformer primary current position, secondary load selector switch KG5 places tested current transformer secondary load position on load box 4 panels, and the external 0.06 Ω lead of load box 4 is taken into account; In on voltage controller power source case 5 panels, transfer investigation mission outside the city or town K switch G1 to place " interior accent ", coarse adjustment fine tuning K switch G2 to place " coarse adjustment ".Plug in, open power switch on the pressure regulator, this moment, the liquid crystal display of tester had demonstration, and tester should be arranged under this functional status of measuring current transformer error, begins to measure, and slowly regulates pressure regulator, measures each point tolerance of tested current transformer according to this.It is not enough fineness to occur during test, then pressure regulator is returned zero earlier, then coarse adjustment fine tuning K switch G2 is placed " fine tuning ".Use " interior accent " enough to testing general current transformer, but when the primary circuit capacity is big when once big current lead is longer, the capacity of inner pressure regulator just may be not enough, the dial gauge of tester might rise less than 120%, place " investigation mission outside the city or town " with interior accent investigation mission outside the city or town K switch G1 this moment, and external jumbo pressure regulator and current lifting device provide primary current on external voltage controller power source input terminal S1 and S2.
In Fig. 2, voltage controller power source circuit in the voltage controller power source case square body 5 also has zero position protection function and load expanded function except that voltage regulation function, when power switch KG0 closure, if pressure regulator TYQ is in zero-bit, limit switch KG3 closure then, the pilot relay J1 that closes a floodgate the on the one hand then relay self-locking of switching on, combined floodgate pilot relay normally opened contact J1-1 adhesive, combined floodgate pilot relay normally closed contact J1-2 disconnect, and make pressure regulator TYQ energized; When coarse adjustment fine tuning switch KG2 placed " coarse adjustment " position, coarse adjustment pilot relay J2 switched on, the double-throw contact J2-2 coarse adjustment contacting of coarse adjustment pilot relay normally opened contact J2-1 adhesive, coarse adjustment pilot relay on the other hand; When coarse adjustment fine tuning switch KG2 places " fine tuning " position, fine tuning pilot relay J3 energising, fine tuning pilot relay normally closed contact J3-1 disconnects, coarse adjustment pilot relay J2 dead electricity, coarse adjustment pilot relay normally opened contact J2-1 disconnects the double-throw contact J2-2 fine tuning contacting of self-locking, coarse adjustment pilot relay.If pressure regulator TYQ is just not closed at zero-bit limit switch KG3, it is the input of pressure regulator non-transformer that the pilot relay J1 that then closes a floodgate can't switch on, and this has just played protective effect.When interior accent investigation mission outside the city or town K switch G1 places " interior accent ", positioning Nja and NJx in then connecting, when placing " investigation mission outside the city or town ", external voltage controller power source is imported terminal S1 and S2 on square framework 1 frame of connection belt wheel, is used for external high capacity pressure regulator, so that the expansion load capacity.
Fig. 3 is current transformer measuring principle figure, Fig. 4 is the voltage measuring transformer schematic diagram, utilize this device can also do the voltage transformer error test, only need the tester in this device 3 is used separately: the side door of this device is opened, the stage body line that tester square box 3 sides is met tester difference stream terminal K and D disconnects, the function setting of tester changes voltage measuring transformer into, presses the wiring of voltage transformer (VT) calibrating circuit and gets final product.
Claims (4)
1, a kind of mutual inductor on site calibration equipment, form by stage body (1), band current lifting device standard mutual inductor (2), tester (3), load box (4), voltage controller power source (5), it is characterized in that: stage body (1) is the square framework of belt wheel, other four separate equipment all are square box, the panel two ends of standard mutual inductor square box (2), tester square box (3) and load box square body (4) all are useful on the activity handle (6) that proposes casing, and above-mentioned four square box are fixed in the square framework of belt wheel (1) compactly by the screw on the panel; Have two tested mutual inductor secondary terminal K1 and K2, two external voltage controller power sources to import terminal S1 and S2, an on-the-spot ground connection terminal G on the frame of stage body (1) end face, the side of stage body (1) has one to be convenient to the Side door that wiring is used; No-load voltage ratio change-over switch KG4, polarity terminal L, the low nonpolar terminal L1 of primary current and the nonpolar terminal L2 of higher primary current are arranged on standard mutual inductor square box (2) panel; On tester square box (3) panel little LPT T, liquid crystal display S, computer interconnection interface D and operation push-button are arranged; On load box square body (4) panel secondary load selector switch KG5 is arranged; Power switch KG0, supply socket P, interior accent investigation mission outside the city or town switch KG1, coarse adjustment fine tuning switch KG2 and pressure regulator handle B are arranged on voltage controller power source case square body (5) panel; Standard mutual inductor current terminal contact T0 and tested transformer current terminal TX, difference stream terminal K and D, reference voltage terminal a and x, ground connection terminal G1 are arranged on the side of tester square box (3); The input supply socket P of voltage controller power source case square body (5) connects the 220V power supply, two output terminals of voltage controller power source case square body (5) are received a secondary input end of standard mutual inductor square box (2), the difference stream terminal K of the secondary two output termination tester square box (3) of standard mutual inductor square box (2) and standard mutual inductor current terminal contact T0 are as the input of tester, the difference that tested mutual inductor secondary terminal K1 connects on tester square box (3) side on stage body (1) the end face frame flows the input of terminal K as tester, tested mutual inductor secondary terminal K2 connects the input end of load box square body (4), and the output of load box square body (4) meets tested transformer current terminal TX on the tester square box (3) as the input of tester.
2, mutual inductor on site calibration equipment according to claim 1, it is characterized in that: its standard mutual inductor square box (2) is by forming from up-flow standard mutual inductor CT and no-load voltage ratio change-over switch KG4, no-load voltage ratio change-over switch KG4 is the multidigit toggle switch, one secondary input end of standard mutual inductor square box (2) promptly from up-flow standard mutual inductor CT from up-flow input end V1 and V2, terminal three an ends output from up-flow standard mutual inductor CT meets polarity terminal L one time, low nonpolar terminal L1 of primary current and the nonpolar terminal L2 of higher primary current, export public termination difference stream terminal K from up-flow standard mutual inductor CT secondary, export other multiterminal from up-flow standard mutual inductor CT secondary and connect many grades of no-load voltage ratio change-over switch KG4, the public termination standard mutual inductor current terminal contact T0 of no-load voltage ratio change-over switch KG4.
3, mutual inductor on site calibration equipment according to claim 1 and 2 is characterized in that: a polarity terminal L on its standard mutual inductor square box (2), the low nonpolar terminal L1 of primary current or the nonpolar terminal L2 of higher primary current can cut up with a hay cutter (7) external tested straight-through current transformer by current knife.
4, mutual inductor on site calibration equipment according to claim 1 and 2, it is characterized in that: its voltage regulation of electric power sources case square body (5) is by supply socket P, power switch KG0, limit switch KG3, coarse adjustment fine tuning switch KG2, combined floodgate pilot relay J1, combined floodgate pilot relay normally opened contact J1-1, combined floodgate pilot relay normally closed contact J1-2, coarse adjustment pilot relay J2, coarse adjustment pilot relay normally opened contact J2-1, the double-throw contact J2-2 of coarse adjustment pilot relay, fine tuning pilot relay J3, fine tuning pilot relay normally closed contact J3-1, pressure regulator TYQ, isolation transformer PT, interior investigation mission outside the city or town switch KG1 of accent and pressure regulator handle B form, limit switch KG3 is installed in pressure regulator TYQ zero-bit position, its moving contact mechanical effect limit switch KG3 closure when pressure regulator TYQ returns zero, power switch KG0 exports an end and is connected to pressure regulator TYQ input A end through combined floodgate pilot relay normally opened contact J1-1, and receive pressure regulator TYQ input X end through combined floodgate pilot relay J1 again through limit switch KG3 and combined floodgate pilot relay normally closed contact J1-2, and through coarse adjustment position that coarse adjustment pilot relay normally opened contact J2-1 receives coarse adjustment fine tuning switch KG2, the power switch KG0 output other end directly is connected to pressure regulator TYQ input X end, and the fine tuning position of receiving coarse adjustment fine tuning switch KG2 through fine tuning pilot relay J3, and through the coarse adjustment position that fine tuning pilot relay normally closed contact J3-1 and coarse adjustment pilot relay J2 receive coarse adjustment fine tuning switch KG2, the input end of combined floodgate pilot relay J1 and pressure regulator TYQ input A end short circuit; The output termination of pressure regulator TYQ is isolated the input end of mutual inductance PT, the output of isolation transformer PT has three ends, wherein two ends a2 and a1 transfer the interior positioning Nja of investigation mission outside the city or town switch KG1 in the double-throw contact of coarse adjustment pilot relay J2-2 is connected to, and transfer the interior positioning NJx of investigation mission outside the city or town switch KG1 in other end x is connected to; The interior outer positioning Wja of investigation mission outside the city or town switch KG1 and the WJx of transferring is connected to external voltage controller power source input terminal S1 and S2 on the square framework of belt wheel (1) frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02279384 CN2574066Y (en) | 2002-09-28 | 2002-09-28 | In-situ mutual inductor checking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02279384 CN2574066Y (en) | 2002-09-28 | 2002-09-28 | In-situ mutual inductor checking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2574066Y true CN2574066Y (en) | 2003-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02279384 Expired - Lifetime CN2574066Y (en) | 2002-09-28 | 2002-09-28 | In-situ mutual inductor checking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2574066Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950010A (en) * | 2010-08-25 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Full-automatic measuring device of load tank |
| CN102253355A (en) * | 2011-05-31 | 2011-11-23 | 上海思南电力通信有限公司 | System and method for inspecting small-signal output type unconventional mutual inductor |
| CN102749607A (en) * | 2012-07-03 | 2012-10-24 | 辽宁省电力有限公司营口供电公司 | Test platform for electronic current transformer |
| CN101782638B (en) * | 2009-01-16 | 2013-06-26 | 国网电力科学研究院武汉南瑞有限责任公司 | Calibration device and method capable of measuring multiple current transformers once |
| CN103208772A (en) * | 2013-03-29 | 2013-07-17 | 国家电网公司 | High-voltage transformer test protection device with multi-protection function |
| CN105929354A (en) * | 2016-06-29 | 2016-09-07 | 国家电网公司 | Automatic calibrating device and method for large current transformer |
| CN105974352A (en) * | 2016-06-20 | 2016-09-28 | 国网天津市电力公司 | Ultra-high voltage current transformer error field test monitoring method |
| CN111693925A (en) * | 2020-07-20 | 2020-09-22 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Current transformer detection operation platform and multi-position top-speed current transformer calibration system |
| CN112068062A (en) * | 2020-09-10 | 2020-12-11 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Mutual inductor calibration system and calibration method |
| CN112710978A (en) * | 2020-11-30 | 2021-04-27 | 国网北京市电力公司 | Detection system of anti-direct current transformer |
-
2002
- 2002-09-28 CN CN 02279384 patent/CN2574066Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782638B (en) * | 2009-01-16 | 2013-06-26 | 国网电力科学研究院武汉南瑞有限责任公司 | Calibration device and method capable of measuring multiple current transformers once |
| CN101950010B (en) * | 2010-08-25 | 2013-03-06 | 国网电力科学研究院武汉南瑞有限责任公司 | Full-automatic measuring device of load tank |
| CN101950010A (en) * | 2010-08-25 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Full-automatic measuring device of load tank |
| CN102253355B (en) * | 2011-05-31 | 2014-03-26 | 上海电力通信有限公司 | System and method for inspecting small-signal output type unconventional mutual inductor |
| CN102253355A (en) * | 2011-05-31 | 2011-11-23 | 上海思南电力通信有限公司 | System and method for inspecting small-signal output type unconventional mutual inductor |
| CN102749607A (en) * | 2012-07-03 | 2012-10-24 | 辽宁省电力有限公司营口供电公司 | Test platform for electronic current transformer |
| CN103208772A (en) * | 2013-03-29 | 2013-07-17 | 国家电网公司 | High-voltage transformer test protection device with multi-protection function |
| CN105974352A (en) * | 2016-06-20 | 2016-09-28 | 国网天津市电力公司 | Ultra-high voltage current transformer error field test monitoring method |
| CN105929354A (en) * | 2016-06-29 | 2016-09-07 | 国家电网公司 | Automatic calibrating device and method for large current transformer |
| CN105929354B (en) * | 2016-06-29 | 2018-10-16 | 国家电网公司 | Great current mutual inductor automatic calibrator and method |
| CN111693925A (en) * | 2020-07-20 | 2020-09-22 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Current transformer detection operation platform and multi-position top-speed current transformer calibration system |
| CN112068062A (en) * | 2020-09-10 | 2020-12-11 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Mutual inductor calibration system and calibration method |
| CN112068062B (en) * | 2020-09-10 | 2023-01-03 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Mutual inductor calibration system and calibration method |
| CN112710978A (en) * | 2020-11-30 | 2021-04-27 | 国网北京市电力公司 | Detection system of anti-direct current transformer |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE WU Free format text: FORMER OWNER: WUHAN HUADIAN GUODIAN HIGH VOLTAGE SCIENCE + TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20090821 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CU03 | Correction of utility model patent gazette |
Correction item: Termination of patent right Correct: Rescind the termination notice False: Patent right to terminate Number: 48 Volume: 21 |
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| ERR | Gazette correction |
Free format text: CORRECT: CESSATION OF PATENT RIGHT; FROM: CESSATION OF PATENT RIGHT DUE TO NON-PAYMENT OF THE ANNUAL FEE TO: CANCEL TERMINATION OF NOTICE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20090821 Address after: Luoyu Road, Hubei province Wuhan city Hongshan District No. 143, zip code: 430074 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: Luoyu Road, Hubei province Wuhan city Hongshan District No. 143, zip code: 430074 Patentee before: Wuhan Huadian High Voltage Science & Technology Development Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120928 Granted publication date: 20030917 |