CN102707103B - Deformation test lead wire of anti-interference type transformer winding and testing device formed by same - Google Patents
Deformation test lead wire of anti-interference type transformer winding and testing device formed by same Download PDFInfo
- Publication number
- CN102707103B CN102707103B CN201210143590.4A CN201210143590A CN102707103B CN 102707103 B CN102707103 B CN 102707103B CN 201210143590 A CN201210143590 A CN 201210143590A CN 102707103 B CN102707103 B CN 102707103B
- Authority
- CN
- China
- Prior art keywords
- signal cable
- hole
- screw
- test lead
- transformer winding
- 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.)
- Active
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a deformation test lead wire of an anti-interference type transformer winding, comprising a signal cable, a copper braiding belt which is used as a grounding wire, an upper connecting piece and a lower connecting piece, wherein the upper end of the copper braiding belt is connected with a shielding layer at the upper part of the signal cable through the upper connecting piece; the lower end of the copper braiding belt is connected with the lower part of the signal cable through the lower connecting piece, so that parts of the copper braiding belt and the signal cable, which are located between the upper connecting piece and the lower connecting piece, are parallel and are arranged on the outer wall face of an electric transformer sleeve at an interval in a testing process. The invention further discloses a testing device formed by the test lead wire. The copper braiding belt is used as the grounding wire so that a resistance and an inductance of a test loop can be effectively reduced; the signal cable and the copper braiding belt are parallel and are arranged on the outer wall face of the sleeve at an interval, so that a capacitance between the measuring lead wire and the sleeve is a constant value, the influences of the test lead wire on a test result are effectively reduced, the accuracy of the test result is improved and the test data can be repeatedly used.
Description
Technical field
The present invention relates to power equipment technical field of measurement and test, particularly a kind of anti-interference type deformation of transformer winding test lead, also relates to the proving installation being comprised of above-mentioned test lead.
Background technology
Power transformer belongs to a kind of concrete form of transformer, the power equipment of the voltage and current that it is is another system by electromagnetic induction by the alternating voltage of a system and current conversion, it is mainly comprised of unshakable in one's determination and cover two or more windings thereon.
Power transformer is one of most important equipment in electric system, can its reliability is directly connected to whole electric system safely, effectively, operation economically.Power transformer is in the process that install at operational process and the scene that is transported to, winding in power transformer may be subject to mechanical force external force or electrodynamic effect and cause winding to produce distortion, these distortion show with forms such as bird caging, bulge or displacements conventionally, what is more, when deformation comparison is serious, understand the generation that directly affect the serviceability of power transformer and directly cause sudden accident; In addition, after local deformation occurs winding, even without damaging immediately, also may leave serious potential faults.Therefore, must carry out deformation test to Transformer Winding, judge the state of winding according to test result, deformation test has become the important checkup item of transformer state.
At present, along with the development of winding deformation diagnostic techniques, frequency response analysis (abbreviation method of frequency response method) has become the main method that is widely used in carrying out deformation of transformer winding analysis both at home and abroad gradually, as shown in Figure 1, the proving installation that existing frequency response analysis is used comprises the jointing clamp for being clamped in power transformer sleeve pipe 3 tops, winding deformation tester and lead-in wire, wherein, lead-in wire is comprised of cable 30 and ground wire 40, one end of cable 30 connects jointing clamp 31, its other end is used BNC connector to connect winding deformation tester 32, and one end of ground wire 40 is connected with the screen layer of cable 30, the other end is connected on the casing of power transformer as earth point, in order to improve as much as possible the accuracy of winding deformation test, the external shielding layer of cable needs ground connection, external undesired signal can be imported the earth by this layer, avoiding interference signal enters inner conductor and disturbs and reduce the loss of signal transmission simultaneously, improve the antijamming capability of measuring cable.
The test philosophy of method of frequency response method is: the frequency response characteristic of test Transformer Winding, carries out winding deformation analysis by the consistance that compares crest, trough frequency.The advantage of this kind of method is simple to operate, easy to implement.But, the defect of the method is: (1) owing at present the test of deformation of transformer winding being unified to definite working specification, different manufacturers can be variant in the mode of connection when testing, the difference of the distance difference of difference in length, ground wire and the sleeve pipe comprising and the ground wire quantity of using etc., also have earth point loose contact, all can cause the variation of resistance R; (2) in test process, earth point for ground wire does not clearly stipulate, therefore in the situation that not requiring, if guarantee the reliability of ground connection, ground wire is normally by certain bolt on power transformer or earthing bar ground connection, when this has just caused different operating personnel to test, the selection of butted line mode and earth point is different, and measuring earth point difference twice will cause the variation of capacitor C, and the coiling of ground wire will cause the variation of inductance L.And the change of above-mentioned arbitrary parameter (comprising resistance R, capacitor C and inductance L) all will cause the variation of Transformer Winding frequency response curve, not only can not guarantee the accuracy of test data, and because the test data of front and back test process gained is inconsistent, test data cannot be reused, thereby affected the repeatability of test data.
Summary of the invention
First object of the present invention be to provide a kind of simple in structure, be easy to make, anti-interference type deformation of transformer winding test lead easy and simple to handle, the corresponding structure of each parameter that may affect test data on measuring on lead-in wire is improved, not only improve the accuracy of test data, and made test data reusable.
Second object of the present invention is to provide the proving installation being comprised of above-mentioned test lead.
First object of the present invention realizes by following technical measures: a kind of anti-interference type deformation of transformer winding test lead, it is characterized in that comprising signal cable, as the copper braid over braid of ground wire, upper connector and lower web member, the upper end of described copper braid over braid is connected with the screen layer on described signal cable top by upper connector, the lower end of described copper braid over braid is connected with the bottom of described signal cable by lower web member, so that when test copper braid over braid and the partial parallel of described signal cable between upper connector and lower web member and be all interval in the outside wall surface of power transformer sleeve pipe.
The present invention adopts copper braid over braid as ground wire, and the inductance value of himself and resistance value are little, therefore can effectively reduce resistance and the inductance of test loop; Signal cable is parallel with copper braid over braid and be interval in the outside wall surface of sleeve pipe, the electric capacity that can keep the present invention to measure between lead-in wire and sleeve pipe is definite value, can effectively reduce the impact of test lead on test result, improve the accuracy of deformation of transformer winding test result, and make test data reusable.
As one embodiment of the present invention, described upper connector is mainly by insulcrete, derby and set screw composition, described derby is fixed on the plate face of insulcrete, the edge of described insulcrete stretches out the edge of derby, the joint face of described derby and insulcrete has mounting hole, on described mounting hole, downward-extension connects described derby and insulcrete, the joint area of described signal cable is arranged in described mounting hole, the side of described derby has positioning screw hole, this positioning screw hole is communicated with described mounting hole, described set screw is arranged in positioning screw hole and stretches in mounting hole and fixed and pressed closer on signal cable by nut through copper braid over braid upper end, copper braid over braid is pressed between the positioning screw hole peritreme of nut and derby.Insulcrete can prevent that derby from contacting with the equal pressure cap at bushing shell for transformer top.
In order to strengthen the connection reliability of upper connector, as a modification of the present invention, in the side of described derby, also have the reinforcing screw relative with described positioning screw hole, described reinforcing screw is communicated with described mounting hole, reinforces screw and is arranged in described positioning screw hole and stretches in mounting hole and locate with the common clamping signal cable of set screw.
Derby of the present invention for being threaded, also can adopt other existing connected mode with insulcrete.
As one embodiment of the present invention, described lower web member is mainly by forming for the chuck, fixture and the link that are clamped on casing flange bolt, described fixture has the dop for clamping respectively copper braid over braid and signal cable, described chuck, fixture and link are made by conductive material, and described chuck and fixture are fixedly connected by link.
Chuck of the present invention comprises bearing, thimble and screw mandrel, described bearing is crotch type, by mobile jib, formed with two poles that are connected with mobile jib, between described pole, form opening, the end of one of them pole has threaded hole, described screw mandrel extends in the opening of described bearing through the threaded hole on pole, this end is inserting end, the pole face that another pole is positioned at described bearing opening is provided with the cuspidated thimble of tool, the end face of the inserting end of described screw mandrel relative with the tip of described thimble so that on casing flange the head of bolt be clamped between screw mandrel and thimble.
For the ease of rotary screw, to regulate the size of clamp port, as a modification of the present invention, the present invention also comprises hand lever, and described MLP Manual Lever Position one end outside bearing opening is provided with through hole, and described hand lever is through fixing after through hole.
Fixture of the present invention comprises fixed dam, the first wiring pressing plate, the second wiring pressing plate and regulating part, described regulating part adopts and regulates double-screw bolt and setting nut, described fixed dam and wiring pressing plate all vertically arrange, correspondingly on the plate face of described fixed dam and wiring pressing plate have two threaded holes, described adjusting double-screw bolt is from being fixed in the second wiring pressing plate through after described threaded hole successively outside to inside, and be positioned on outside one end setting nut is installed at adjusting double-screw bolt, so that signal cable is clamped in the dop that is described clamping signal cable between two wiring pressing plates, and make copper braid over braid be clamped in the dop that is described clamping copper braid over braid between first wiring pressing plate and fixed dam.
Link of the present invention comprises joint pin, regulates double-screw bolt and adjusting bolt, one end of described joint pin is fixed in described the second wiring pressing plate, the other end as the inner of joint pin along in the described mobile jib of being axially fixed at of described bearing mobile jib, the inner of described joint pin has laterally to be run through and interior threaded pilot hole, on described mobile jib, have threaded hole, described threaded hole is communicated with pilot hole, and described adjusting double-screw bolt passes described threaded hole and is fixed in pilot hole.
As the preferred embodiment of the present invention, the width of described copper braid over braid is 20～30mm, both can reduce self high-frequency inductor, does not affect again the convenience of use.
Second object of the present invention realizes by following technical measures: a kind of proving installation being comprised of above-mentioned test lead, it is characterized in that comprising test lead, for clamping jointing clamp and the deformation of transformer winding tester at power transformer sleeve pipe top, wherein, the jaw of described jointing clamp connects the upper end of described signal cable, the lower end of described signal cable connects described deformation of transformer winding tester, and described lower web member is connected with bolt on casing flange, form test loop.
As a kind of way of recommendation of the present invention, described signal cable is connected by BNC connector with described deformation of transformer winding tester.
Compared with prior art, the present invention has following significant effect:
(1) the present invention adopts copper braid over braid as ground wire, and the inductance value of himself and resistance value are little, therefore can effectively reduce resistance and the inductance of test loop; Signal cable is parallel with copper braid over braid and be interval in the outside wall surface of sleeve pipe, the electric capacity that can keep the present invention to measure between lead-in wire and sleeve pipe is definite value, can effectively reduce the impact of test lead on test result, improve the accuracy of deformation of transformer winding test result, and make test data reusable.
(2) the present invention adopts lower web member to make lead-in wire to cause sleeve bottom flange along sleeve surface, to keep the electric capacity of measuring between lead-in wire and sleeve pipe substantially to immobilize, and lower web member be provided with for the fixed dam of fixed signal cable with for first, second wiring pressing plate of fixed copper braid over braid, make signal cable in good order.
(3) the insulcrete of upper connector has insulating effect, can prevent that cable splice from contacting with the grading shield at sleeve pipe top.
(4) the present invention improves each structure that may affect test result on measurement lead-in wire, meets the requirement of deformation of transformer winding specifications of surveys completely.
Of the present invention simple in structure, be easy to make, easy and simple to handle, practical, be specially adapted to the occasion of winding deformation of power transformer test.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Structural representation when Fig. 1 is existing Winding in Power Transformer test;
Fig. 2 is the structural representation of the present invention while testing;
Fig. 3 is longitudinal cross-sectional schematic of upper connector of the present invention;
Fig. 4 is the perspective view of web member under the present invention;
Fig. 5 is the sectional structure schematic diagram of lower web member.
Embodiment
As shown in Figure 2-5, be a kind of anti-interference type deformation of transformer winding of the present invention test lead, comprise signal cable 1, the copper braid over braid 2 as ground wire, upper connector 50 and lower web member 51, the width of copper braid over braid 2 is 20mm.The upper end of copper braid over braid 2 is connected with the screen layer on signal cable 1 top by upper connector, the lower end of copper braid over braid 2 is connected with the bottom of signal cable 1 by lower web member, so that partial parallel between upper connector and lower web member of copper braid over braid 2 and signal cable 1 and be all interval in the outside wall surface of power transformer sleeve pipe 3 while testing.
Referring to Fig. 3, upper connector 50 is mainly comprised of insulcrete 4, derby 5 and set screw 6, derby 5 is threaded connection on the plate face that is fixed on insulcrete 4, the edge of insulcrete 4 stretches out the edge of derby 5, and insulcrete 4 can prevent that derby 5 from contacting with the equal pressure cap at bushing shell for transformer 3 tops.Derby 5 has mounting hole with the joint face of insulcrete 4, on mounting hole, downward-extension connects derby 5 and insulcrete 4, the joint area 7 of signal cable 1 is arranged in mounting hole, the side of derby 5 has positioning screw hole, this positioning screw hole is communicated with mounting hole, set screw 6 is arranged in positioning screw hole and stretches in mounting hole and fixed and pressed closer on signal cable 1 by nut 8 through copper braid over braid 2 upper ends, copper braid over braid 2 is pressed between nut 8 and the positioning screw hole peritreme of derby 5, in the side of derby 5, also have the reinforcing screw relative with positioning screw hole, reinforcing screw is communicated with mounting hole, reinforcing screw 9 is arranged in reinforcing screw and stretches in mounting hole and locate with the common clamping signal cable 1 of set screw 6.
Referring to Fig. 4,5, lower web member 51 is main by forming for the chuck, fixture and the link that are clamped on casing flange bolt 16, fixture has the dop for clamping respectively copper braid over braid and signal cable, chuck, fixture and link are made by conductive material, and chuck and fixture are fixedly connected by link.In the present embodiment, chuck comprises bearing, thimble 11, screw mandrel 12 and hand lever 17, bearing is crotch type, by mobile jib 13 and two poles 14 that are connected with mobile jib 13, 15 compositions, pole 14, between 15, form opening, the end of one of them pole 15 has threaded hole, screw mandrel 12 extends in the opening of bearing through the threaded hole on pole 15, this end is inserting end, the pole face that another pole 14 is positioned at bearing opening is provided with the cuspidated thimble 11 of tool, the tip of the end face of the inserting end of screw mandrel 12 and thimble 11 relative so that on casing flange the head of bolt 16 be clamped between screw mandrel 12 and thimble 11.One end that hand lever 17 is positioned at outside bearing opening is provided with through hole, and hand lever 17 is through fixing after through hole.
Fixture comprises fixed dam 18, the first wiring pressing plate 19, the second wiring pressing plate 20 and regulating part, regulating part adopts and regulates double-screw bolt 21 and setting nut 22, fixed dam 18 all vertically arranges with wiring pressing plate, correspondingly on the plate face of fixed dam 18 and wiring pressing plate have two threaded holes, regulate double-screw bolt 21 from being fixed in the second wiring pressing plate 20 through after threaded hole successively outside to inside, and setting nut 22 is installed regulating double-screw bolt 21 to be positioned on outside one end, so that signal cable 1 is clamped in two wiring pressing plates 19, between 20, be the dop of clamping signal cable 1, and make copper braid over braid 2 be clamped in the dop that is clamping copper braid over braid 2 between first wiring pressing plate 19 and fixed dam 18.
Link comprises joint pin 23, regulates double-screw bolt 24 and adjusting bolt 25, one end of joint pin 23 is fixed in the second wiring pressing plate 20, the other end is as the inner being axially fixed in mobile jib along bearing mobile jib of joint pin 23, the inner of joint pin 23 has laterally to be run through and interior threaded pilot hole, on mobile jib, have threaded hole, threaded hole is communicated with pilot hole, regulates double-screw bolt 24 through threaded hole and is fixed in pilot hole.
Referring to Fig. 2, a kind of proving installation being formed by above-mentioned test lead, comprise test lead, for clamping the jointing clamp 25 and deformation of transformer winding tester 26 at power transformer sleeve pipe 3 tops, wherein, the jaw of jointing clamp 25 connects the upper end of signal cable 1, the lower end of signal cable 1 is by BNC connector connection transformer winding deformation tester 26, and lower web member is connected with bolt on casing flange 16, forms test loop.
Embodiments of the present invention are not limited to this, according to foregoing of the present invention, according to ordinary skill knowledge and the customary means of this area, do not departing under the above-mentioned basic fundamental thought of the present invention prerequisite, upper connector of the present invention, lower web member also have other embodiment; And the width of copper braid over braid can also select the each numerical value in 20～30mm except 20mm, therefore the present invention can also make modification, replacement or the change of other various ways, within all dropping on rights protection scope of the present invention.
Claims (9)
1. an anti-interference type deformation of transformer winding test lead, it is characterized in that: comprise signal cable, the copper braid over braid as ground wire, upper connector and lower web member, the upper end of described copper braid over braid is connected with the screen layer on described signal cable top by upper connector, the lower end of described copper braid over braid is connected with the bottom of described signal cable by lower web member, so that partial parallel between upper connector and lower web member of copper braid over braid and described signal cable and be all interval in the outside wall surface of power transformer sleeve pipe while testing, described upper connector is mainly by insulcrete, derby and set screw composition, described derby is fixed on the plate face of insulcrete, the edge of described insulcrete stretches out the edge of derby, the joint face of described derby and insulcrete has mounting hole, on described mounting hole, downward-extension connects described derby and insulcrete, the joint area of described signal cable is arranged in described mounting hole, the side of described derby has positioning screw hole, this positioning screw hole is communicated with described mounting hole, described set screw is arranged in positioning screw hole and stretches in mounting hole and fixed and pressed closer on signal cable by nut through copper braid over braid upper end, copper braid over braid is pressed between the positioning screw hole peritreme of nut and derby.
2. anti-interference type deformation of transformer winding test lead according to claim 1, it is characterized in that: in the side of described derby, also have the reinforcing screw relative with described positioning screw hole, described reinforcing screw is communicated with described mounting hole, reinforces screw and is arranged in described positioning screw hole and stretches in mounting hole and the common clamping signal cable of set screw.
3. anti-interference type deformation of transformer winding test lead according to claim 2, it is characterized in that: described lower web member is mainly by forming for the chuck, fixture and the link that are clamped on casing flange bolt, described fixture has the dop for clamping respectively copper braid over braid and signal cable, described chuck, fixture and link are made by conductive material, and described chuck and fixture are fixedly connected by link.
4. anti-interference type deformation of transformer winding test lead according to claim 3, it is characterized in that: described chuck comprises bearing, thimble and screw mandrel, described bearing is crotch type, by mobile jib, formed with two poles that are connected with mobile jib, between described pole, form opening, the end of one of them pole has threaded hole, described screw mandrel extends one end in the opening of described bearing inserting end as screw mandrel through the threaded hole on pole, the pole face that another pole is positioned at described bearing opening is provided with the cuspidated thimble of tool, the end face of the inserting end of described screw mandrel relative with the tip of described thimble so that on casing flange the head of bolt be clamped between screw mandrel and thimble.
5. anti-interference type deformation of transformer winding test lead according to claim 4, is characterized in that: described test lead also comprises hand lever, and described MLP Manual Lever Position one end outside bearing opening is provided with through hole, and described hand lever is through fixing after through hole.
6. anti-interference type deformation of transformer winding test lead according to claim 5, it is characterized in that: described fixture comprises fixed dam, the first wiring pressing plate, the second wiring pressing plate and regulating part, described regulating part adopts and regulates double-screw bolt and setting nut, described fixed dam and wiring pressing plate all vertically arrange, correspondingly on the plate face of described fixed dam and wiring pressing plate have two threaded holes, described adjusting double-screw bolt is from being fixed in the second wiring pressing plate through after described threaded hole successively outside to inside, and be positioned on outside one end setting nut is installed at adjusting double-screw bolt, so that signal cable is clamped in the dop that is described clamping signal cable between two wiring pressing plates, and make copper braid over braid be clamped in the dop that is described clamping copper braid over braid between first wiring pressing plate and fixed dam.
7. anti-interference type deformation of transformer winding test lead according to claim 6, it is characterized in that: described link comprises joint pin, regulate double-screw bolt and adjusting bolt, one end of described joint pin is fixed in described the second wiring pressing plate, the other end as the inner of joint pin along in the described mobile jib of being axially fixed at of described bearing mobile jib, the inner of described joint pin has laterally to be run through and interior threaded pilot hole, on described mobile jib, have threaded hole, described threaded hole is communicated with pilot hole, described adjusting double-screw bolt passes described threaded hole and is fixed in pilot hole.
8. anti-interference type deformation of transformer winding test lead according to claim 7, is characterized in that: the width of described copper braid over braid is 20～30mm.
9. the proving installation being formed by test lead described in claim 1, it is characterized in that: comprise test lead, jointing clamp and deformation of transformer winding tester for grip sleeve top end, wherein, the jaw of described jointing clamp connects the upper end of described signal cable, the lower end of described signal cable connects described deformation of transformer winding tester, and described lower web member is connected with bolt on casing flange, form test loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210143590.4A CN102707103B (en) | 2012-05-10 | 2012-05-10 | Deformation test lead wire of anti-interference type transformer winding and testing device formed by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210143590.4A CN102707103B (en) | 2012-05-10 | 2012-05-10 | Deformation test lead wire of anti-interference type transformer winding and testing device formed by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102707103A CN102707103A (en) | 2012-10-03 |
| CN102707103B true CN102707103B (en) | 2014-04-16 |
Family
ID=46900039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210143590.4A Active CN102707103B (en) | 2012-05-10 | 2012-05-10 | Deformation test lead wire of anti-interference type transformer winding and testing device formed by same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102707103B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511166B (en) * | 2018-03-27 | 2020-06-19 | 山东电力设备有限公司 | Connecting device for detecting deformation of transformer winding |
| CN109856432B (en) * | 2019-03-29 | 2023-11-24 | 国网上海市电力公司 | High-voltage lead supporting device for GIS voltage-resistant partial discharge test |
| CN112397291B (en) * | 2019-08-16 | 2022-08-23 | 国网江苏省电力有限公司南京供电分公司 | Transformer low-voltage bushing drainage wire clamp |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6369582B2 (en) * | 2000-05-04 | 2002-04-09 | Georgia Tech Research Corporation | System and method for off-line impulse frequency response analysis test |
| CN101701995B (en) * | 2009-11-12 | 2011-11-16 | 重庆大学 | Impulse response analytical test apparatus and method for detecting deformation of transformer winding |
| CN202649256U (en) * | 2012-05-10 | 2013-01-02 | 广东电网公司电力科学研究院 | Anti-interference transformer winding deformation test lead wire and test device composed thereof |
-
2012
- 2012-05-10 CN CN201210143590.4A patent/CN102707103B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102707103A (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103048635B (en) | Anti-interference performance evaluation method for high voltage cable partial discharge on-line monitoring device | |
| CN101615497A (en) | The integral connecting structure of transformer and current sensor | |
| CN102707103B (en) | Deformation test lead wire of anti-interference type transformer winding and testing device formed by same | |
| CN112067946A (en) | Cable sheath fault monitoring device and method for broadcasting synchronous signals by multiple Rogowski coils | |
| CN106443376A (en) | Partial discharge positioning system for switch cabinet comprising multiple TEV sensors | |
| CN202649256U (en) | Anti-interference transformer winding deformation test lead wire and test device composed thereof | |
| CN105510659B (en) | A kind of electric energy meter part | |
| CN113985223A (en) | Multi-parameter intelligent identification system of high-voltage dry-type sleeve and application | |
| Heizmann et al. | On-site partial discharge measurements on premoulded cross-bonding joints of 170 kV XLPE and EPR cables | |
| CN106384896B (en) | A kind of electric meter earthing or grounding means | |
| EP2482090A1 (en) | System for measuring partial discharges in power lines | |
| CN107561368B (en) | Measurement system and measurement method for broadband impedance characteristics of large-scale power equipment | |
| CN203572868U (en) | System used for measuring interference voltage of intelligent assembly of transformer station GIS | |
| CN117607522A (en) | Can not dismantle high-voltage bushing end screen current sampling device and monitoring system of check-up | |
| CN202150345U (en) | High-voltage high-precision current transformer | |
| CN203365519U (en) | Sampling device for high-voltage bushing electrified detection test | |
| CN203216999U (en) | Capacitive equipment dielectric loss live line measurement sampling device | |
| CN115792335A (en) | Magnetic field coupling method and device for bypass current of cable grounding wire | |
| CN202916306U (en) | Broadband current test caliper device | |
| CN204479620U (en) | Eliminate the anti-interference clamp specially of surface current | |
| CN103954889A (en) | Capacitive type device insulation parameter electrification testing method based on pincerlike current sensors | |
| CN204313786U (en) | Deformation of transformer winding test Special connecting device | |
| CN203350337U (en) | Current sensor | |
| CN113567807A (en) | Method for detecting current abnormity of power cable metal sheath layer | |
| WO2008096298A2 (en) | A method for detecting signals produced by partial electric discharges |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee after: BEIJING SHENGTAI SHISHI ELECTRICAL TECHNOLOGY Co.,Ltd. Patentee after: Electric Power Research Institute of Guangdong Power Grid Co.,Ltd. Address before: 510080, No. 8, Qi Gang, Dongfeng East Road, Guangzhou, Guangdong Co-patentee before: BEIJING SHENGTAI SHISHI ELECTRICAL TECHNOLOGY Co.,Ltd. Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID Corp. |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200409 Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee after: Electric Power Research Institute of Guangdong Power Grid Co.,Ltd. Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee before: BEIJING SHENGTAI SHISHI ELECTRICAL TECHNOLOGY Co.,Ltd. Patentee before: Electric Power Research Institute of Guangdong Power Grid Co.,Ltd. |
|
| TR01 | Transfer of patent right |