CN109799370B - Dielectric loss test support - Google Patents
Dielectric loss test support Download PDFInfo
- Publication number
- CN109799370B CN109799370B CN201910113239.2A CN201910113239A CN109799370B CN 109799370 B CN109799370 B CN 109799370B CN 201910113239 A CN201910113239 A CN 201910113239A CN 109799370 B CN109799370 B CN 109799370B
- Authority
- CN
- China
- Prior art keywords
- insulating cylinder
- insulating
- rubber clamp
- test
- wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a dielectric loss test bracket, which comprises an insulating cylinder, wherein the front end of the insulating cylinder is provided with a fastener vertical to a tested equipment wire, the fastener is connected with a conductive plate fixedly connected on the inner wall of the insulating cylinder, the conductive plate is electrically connected with an insulating test wire, and the rear end of the insulating cylinder is provided with a clamping part for clamping the insulating test wire. The invention has the characteristics of reasonable design, simple structure, convenient use and the like, and achieves the technical effects of convenient assembly and disassembly functions and accurate test of dielectric loss.
Description
Technical Field
The invention relates to the field of electric power construction and maintenance, in particular to a dielectric loss test bracket.
Background
In recent years, with the great increase of power consumption of power consumers, the addition of novel energy power supply, the construction and application of extra-high voltage alternating current and direct current transmission lines, the status of a transformer substation in a power grid is improved to a new height, transformer substations of various voltage grades are constructed, and the types of primary electrical equipment in the transformer substation are increased; the high-voltage test of the electrical primary equipment is particularly important, and the dielectric loss test is an essential loop in a plurality of high-voltage test projects of the electrical equipment. Under the action of the electric field, a part of energy of the electrical equipment is converted into other forms of energy, usually heat energy, in the process of power transmission. Factors such as untight wire connection between electrical equipment, no transition of copper-aluminum contact, overlarge power transmission amount, overhigh outdoor temperature and the like are eliminated, equipment heating is caused by dielectric loss, the dielectric loss refers to the condition that the temperature of the electrical equipment is increased under the action of an electric field, an insulating material of the electrical equipment is heated and aged if the loss is large, and if the temperature of the dielectric is continuously increased, an insulating part of the electrical equipment is seriously melted and burnt, the insulating capacity is lost, breakdown is caused, and the normal operation of a transformer substation is influenced.
The magnitude of dielectric loss is an important index for measuring the insulation performance. Because the sample capacity is very small, the influence of the stray capacitance of the high-voltage lead and the sample on the measurement cannot be ignored. Fig. 1 is a wiring diagram for measuring the dielectric loss factor of the transformer. Stray capacitance Co exists between the high-voltage lead and a sample (end insulation and a support), and when the surface of the porcelain bushing is dirty and affected by tide, the stray current has an active component, so that a measurement result of the dielectric loss factor has a positive error. The dielectric loss factor tg δ 10 ° measured by a unit for a voltage transformer at 10 °, 45 ° and 90 ° high voltage lead angle a is tg δ 45: tg δ 90=4:2: 1. Obviously, in order to measure accurately, the stray capacitance between the high-voltage lead and the test sample should be reduced as much as possible, which is particularly important under the condition of poor weather conditions. The actual measurement result shows that when the included angle between the high-voltage lead and the test sample is 90 degrees, the stray capacitance is minimum, and the measurement result is closest to the actual dielectric loss factor tg delta. When a dielectric loss test is carried out, a right angle cannot be formed between a high-voltage lead in the dielectric loss test support and the voltage transformer, and the dielectric loss test support is not easy to disassemble.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dielectric loss test bracket which can realize the functions of convenient installation and disassembly and the precise test of dielectric loss.
In order to solve the technical problem, the insulation tube comprises an insulation tube, and is structurally characterized in that a conductive plate is arranged on the inner wall of the front end of the insulation tube, a fastener for fastening a tested equipment wire is arranged at the position, corresponding to the conductive plate, of the front end of the insulation tube, the fastener is perpendicular to the tested equipment wire, a clamping component for clamping an insulation test wire is arranged at the rear end of the insulation tube, and the insulation test wire is electrically connected with the conductive plate.
As a specific optimization scheme, the wall of the front end cylinder of the insulating cylinder is provided with symmetrically arranged slotted holes, the two slotted holes are far away from the position of the conducting plate and are positioned at the radial middle position of the insulating cylinder, and the radial distance of the slotted holes is greater than the outer diameter of the tested equipment wire.
As a specific optimization scheme, two through holes are formed in the wall of the insulating cylinder, nuts are embedded in the through holes, the fastening pieces are arranged in the nuts and are butterfly bolts, the butterfly bolts are coated with insulating materials, and one ends of the butterfly bolts extending into the insulating cylinder correspond to the tested equipment wires.
As a specific optimization scheme, the current-conducting plate comprises a connecting plate and a fixing plate, the connecting plate and the fixing plate are vertically connected, the fixing plate is fixedly installed on the inner wall of the insulating cylinder, a threaded hole matched with the butterfly bolt is formed in the fixing plate, a mounting hole is formed in the connecting plate along the axial direction of the insulating cylinder, and a current-conducting rod installed at the end part of the insulation test wire is electrically connected in the mounting hole.
As a specific optimization scheme, the clamping part comprises an upper rubber clamp and a lower rubber clamp which are arranged at the rear end of the insulating cylinder, a through hole for penetrating an insulation test wire is formed between the upper rubber clamp and the lower rubber clamp, and bolts for driving the upper rubber clamp and the lower rubber clamp to open and close are symmetrically arranged on the wall of the insulating cylinder.
Compared with the prior art, the invention has the following advantages:
the inner wall of the front end of an insulating cylinder is provided with a conductive plate, the front end of the insulating cylinder is provided with a fastener for fastening a tested equipment wire at a position corresponding to the conductive plate, the fastener is perpendicular to the tested equipment wire, the rear end of the insulating cylinder is provided with a clamping part for clamping an insulating test wire, and the insulating test wire is electrically connected with the conductive plate; the fastener and the tested equipment line are arranged at 90 degrees, meanwhile, the fastener is connected with the conductive plate, and the conductive plate is electrically connected with the conductive rod, so that the technical effect that the included angle between the high-voltage lead and the test article is 90 degrees can be realized, when the included angle between the high-voltage lead and the test article is 90 degrees, the stray capacitance is minimum, and the measurement result is closest to the actual dielectric loss factor tg delta; the fastener not only can be fixed the equipment line under test in the insulating cylinder, can also carry out vertical discharge to the equipment line under test, reduces experimental error.
Symmetrically arranged slotted holes are formed in the wall of the front end of the insulating cylinder, the two slotted holes are far away from the position of the current conducting plate and are located in the radial middle position of the insulating cylinder, and the radial distance of the slotted holes is larger than the outer diameter of the equipment wire to be detected; the setting of slotted hole can be convenient for observe whether the fastener will be fixed by the equipment line under test, and the installation and the dismantlement of the equipment line under test are convenient for to the external diameter that the aperture of slotted hole is greater than the equipment line under test.
The wall of the insulating cylinder is provided with two through holes, nuts are embedded in the through holes, the fastening pieces are arranged in the nuts, the fastening pieces are butterfly bolts, the heads of the butterfly bolts are coated with insulating materials, and one ends of the butterfly bolts extending into the insulating cylinder are arranged corresponding to the line of the equipment to be tested; the rotation of the butterfly bolt head of butterfly bolt can drive the tip of bolt and press to the inner wall of insulating cylinder on, the fixed position of being tested the equipment line realizes simultaneously that bolt and being tested the equipment line and become the ninety degree contained angle and reduce experimental error, and the cladding insulating material avoids tester's electric shock, and the nut avoids appearing connecting the emergence that appears becoming flexible.
The conducting plate comprises a connecting plate and a fixing plate, the connecting plate and the fixing plate are vertically connected, the fixing plate is fixedly arranged on the inner wall of the insulating cylinder, a threaded hole matched with the butterfly bolt is formed in the fixing plate, a mounting hole is formed in the connecting plate along the axial direction of the insulating cylinder, and a conducting rod mounted at the end part of the insulating test wire is electrically connected in the mounting hole; the fixed plate can fix the current conducting plate on the inner wall of an insulating cylinder, can transmit the electric current to the butterfly bolt simultaneously to when realizing that high-voltage lead wire and sample contained angle 90, stray capacitance is minimum, and the measuring result is the nearest actual dielectric loss factor tg delta, and the mounting hole that the connecting plate was seted up along axial direction is convenient for the installation and the dismantlement of conducting rod.
The clamping component comprises an upper rubber clamp and a lower rubber clamp which are arranged at the rear end of the insulating cylinder, a through hole for passing through an insulation test wire is formed between the upper rubber clamp and the lower rubber clamp, and bolts for driving the upper rubber clamp and the lower rubber clamp to open and close are symmetrically arranged on the wall of the insulating cylinder; go up the cooperation setting of rubber clamp and lower rubber clamp and can carry out the centre gripping to the conducting rod, be convenient for test in the conducting rod installation insulating cylinder, fastening bolt can make rubber clamp and lower rubber clamp realize pressing from both sides the clamp of conducting rod, avoids rocking of conducting rod to influence test result.
In conclusion, the invention has the characteristics of reasonable design, simple structure, convenient use and the like, and achieves the technical effects of convenient disassembly function and accurate test of dielectric loss.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a background illustration of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic top view of the structure of FIG. 2;
FIG. 4 is a schematic left side view of the structure of FIG. 2;
FIG. 5 is a schematic view of the use configuration of the present invention;
in the figure:
1-insulating cylinder, 2-butterfly bolt, 3-tested equipment wire, 4-nut, 5-conducting plate, 6-mounting hole, 7-upper rubber clamp, 8-lower rubber clamp, 9-slotted hole, 10-conducting rod and 11-insulating test wire.
Detailed Description
In the present invention, for convenience of description, the left-right direction with reference to fig. 2 is the front-rear direction of the present invention; referring to fig. 2-5, the dielectric loss test bracket comprises an insulating cylinder 1 with a length of 0.8 meter, 10kV is used in the dielectric loss test, the minimum safe distance of 10kV is 0.7 meter, 0.8 meter is used here, a conductive plate 5 is arranged on the inner wall of the front end of the insulating cylinder 1, the conductive plate 5 comprises a connecting plate and a fixing plate, the connecting plate and the fixing plate are vertically connected, the fixing plate is fixedly arranged on the inner wall of the insulating cylinder 1, a threaded hole matched with the butterfly bolt 2 is arranged on the fixing plate, a mounting hole 6 is arranged on the connecting plate along the axial direction of the insulating cylinder 1, a conductive rod 10 arranged at the end part of an insulating test lead 11 is electrically connected in the mounting hole 6, a fastener for fastening a tested equipment lead 3 is arranged at the position of the front end of the insulating cylinder 1 corresponding to the conductive plate 5, two through holes are arranged on the cylinder wall of the insulating cylinder 1, a, the fastener is butterfly bolt 2, and the cladding has insulating material on the butterfly bolt head, and butterfly bolt 2 extends to the inside one end of insulating cylinder 1 and corresponds the setting with equipment under test line 3. Butterfly bolt 2 sets up with 3 vertical settings of equipment line under test, the hold assembly that is used for centre gripping insulation test wire 11 is installed to the rear end of insulating cylinder 1, the hold assembly is including installing last rubber clamp 7 and lower rubber clamp 8 at 1 rear end of insulating cylinder, it is used for passing the through-hole of insulation test wire 11 to go up to constitute between rubber clamp 7 and the lower rubber clamp 8, the symmetry is installed on 1 section of thick bamboo wall of insulating cylinder and is used for driving the bolt that goes up rubber clamp 7 and lower rubber clamp 8 and open and shut, insulation test wire 11 is connected with current conducting plate 5 electricity.
The symmetrical slotted holes 9 are formed in the wall of the front end cylinder of the insulating cylinder 1, the two slotted holes 9 are far away from the position of the conducting plate 5 and located at the radial middle position of the insulating cylinder 1, the radial distance of the slotted holes 9 is larger than the outer diameter of the tested equipment wire 3, the axial length of the slotted holes 9 along the insulating cylinder 1 is smaller than the length of the fixing plate, the slotted holes 9 can be used for observing whether the tested equipment wire 3 is fastened by a stud of a butterfly bolt or not, the tested equipment wire 3 can directly enter the insulating cylinder 1 through the slotted holes 9 conveniently, the insulating cylinder 1 is made of epoxy resin, the insulating cylinder 1 made of epoxy resin can resist 50kV voltage, and meanwhile, the influence of stray current generated in the process of testing high voltage can be eliminated. The butterfly bolt 2 is made of brass material, and the nut 4 is made of beryllium bronze material; the conductive plate 5 is made of red copper material with good conductivity.
The fastening bolt comprises a butterfly bolt 2, a nut 4 is sleeved on the butterfly bolt 2, and a limiting hole adaptive to the nut 4 is formed in the insulating cylinder 1; meanwhile, the stud and the butterfly bolt head are connected with the insulating cylinder in a threaded manner, the butterfly bolt head and the stud are detachably mounted, the outer walls of the upper rubber clamp 7 and the lower rubber clamp 8 are provided with limiting covers, the end part of the stud extending into the insulating cylinder is provided with a limiting column, the limiting column is arranged in the limiting cover, the limiting column of the stud is firstly mounted in the limiting cover during mounting, then an upper rubber clamp 7 and a lower rubber clamp 8 are sequentially installed in the insulating cylinder, then the end part of the stud extending out of the insulating cylinder is provided with a butterfly bolt head, the butterfly bolt head is rotated to drive the stud to rotate, because of a limit column installed at the end part of the stud, therefore, the stud can not drive the upper rubber clamp 7 and the lower rubber clamp 8 to rotate, rise and fall, and only can drive the upper rubber clamp 7 and the lower rubber clamp 8 to move up and down, and finally, a mounting hole for mounting the conducting rod 10 is reserved.
When the invention is used, firstly, a conducting rod 10 is electrically connected with a core body of an insulation test wire, then the insulation test wire passes through a through hole formed by an upper rubber clamp 7 and a lower rubber clamp 8, an insulating cylinder 1 is rotated to ensure that a mounting hole 6 of a conducting plate 5 is in threaded connection with the conducting rod 10, a fastening bolt is rotated to tightly press the upper rubber clamp 7 and the lower rubber clamp 8 to fix the insulation test wire 11, a tester holds a bracket to ensure that the insulation test wire 11 is horizontally arranged with the insulating cylinder 1, the insulating cylinder 1 is provided with a tested equipment wire 3, a butterfly bolt 2 is screwed to fix the tested equipment wire 3 in the insulating cylinder 1, the butterfly bolt 2 is vertically arranged with the tested equipment wire 3, after the mounting process is finished, the insulation test wire 11 is electrically conducted, then high voltage electricity in the insulation test wire 11 is transmitted to the fastening bolt through transmission, and the right angle between a high voltage lead in a medium loss test bracket and a voltage transformer is realized, the stray capacitance is minimal and the measurement is closest to the actual dielectric loss factor tg δ.
Claims (1)
1. A dielectric loss test support comprises an insulating cylinder (1), and is characterized in that: the wall of the front end cylinder of the insulating cylinder (1) is provided with symmetrically arranged slotted holes (9), the two slotted holes (9) are far away from the position of the conducting plate (5) and are positioned at the radial middle position of the insulating cylinder (1), and the radial distance of the slotted holes (9) is greater than the outer diameter of the equipment wire (3) to be tested; the wall of the insulating cylinder (1) is provided with two through holes, nuts (4) are embedded in the through holes, fasteners are arranged in the nuts (4), the fasteners are butterfly bolts (2), insulating materials are coated on butterfly bolt heads, and one ends of the butterfly bolts (2) extending into the insulating cylinder (1) are arranged corresponding to the equipment wire (3) to be tested; the inner wall of the front end of the insulating cylinder (1) is provided with a conductive plate (5), the conductive plate (5) comprises a connecting plate and a fixed plate, the connecting plate and the fixed plate are vertically connected, the fixed plate is fixedly arranged on the inner wall of the insulating cylinder (1), the fixed plate is provided with a threaded hole matched with the butterfly bolt (2), the connecting plate is provided with a mounting hole (6) along the axial direction of the insulating cylinder (1), and the mounting hole (6) is electrically connected with a conductive rod (10) mounted at the end part of the insulating test lead (11); a fastener for fastening a tested equipment wire (3) is arranged at the position, corresponding to the current-conducting plate (5), of the front end of the insulating cylinder (1), the fastener is perpendicular to the tested equipment wire (3), a clamping component for clamping an insulating test wire (11) is installed at the rear end of the insulating cylinder (1), the clamping component comprises an upper rubber clamp (7) and a lower rubber clamp (8) which are installed at the rear end of the insulating cylinder (1), a through hole for penetrating through the insulating test wire (11) is formed between the upper rubber clamp (7) and the lower rubber clamp (8), and bolts for driving the upper rubber clamp (7) and the lower rubber clamp (8) to open and close are symmetrically installed on the cylinder wall of the insulating cylinder (1); the insulation test lead (11) is electrically connected with the conductive plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113239.2A CN109799370B (en) | 2019-02-14 | 2019-02-14 | Dielectric loss test support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910113239.2A CN109799370B (en) | 2019-02-14 | 2019-02-14 | Dielectric loss test support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109799370A CN109799370A (en) | 2019-05-24 |
| CN109799370B true CN109799370B (en) | 2021-04-06 |
Family
ID=66562104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910113239.2A Expired - Fee Related CN109799370B (en) | 2019-02-14 | 2019-02-14 | Dielectric loss test support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109799370B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111796170B (en) * | 2020-06-04 | 2023-04-07 | 一汽奔腾轿车有限公司 | Universal wire harness portable connector for durability test of electrical element |
| CN114252491A (en) * | 2021-12-07 | 2022-03-29 | 中国科学院海洋研究所 | Marine steel corrosion hydrogen permeation monitoring sensor and monitoring method in ocean tidal range area |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387670A (en) * | 2008-10-21 | 2009-03-18 | 华南理工大学 | Dielectric loss on-line measurement apparatus for power capacitor |
| CN101592689A (en) * | 2008-05-26 | 2009-12-02 | 福建省普华电子科技有限公司 | Frequency-conversion anti-jamming dielectric loss all-digital measuring instrument and measuring method thereof |
| CN201673211U (en) * | 2010-05-28 | 2010-12-15 | 长沙金艺电子科技有限公司 | High-voltage dielectric loss testing apparatus |
| CN204719219U (en) * | 2015-05-20 | 2015-10-21 | 国网山西省电力公司电力科学研究院 | Dielectric loss tester verification insulator rack for experiment |
| CN205374520U (en) * | 2016-01-06 | 2016-07-06 | 云南电网有限责任公司电力科学研究院 | Capacitive character mutual -inductor dielectric loss measures termination |
| CN106066427A (en) * | 2016-06-16 | 2016-11-02 | 国网辽宁省电力有限公司锦州供电公司 | The dielectric loss test instrument of low capacity test product and using method thereof |
| CN207424103U (en) * | 2017-10-12 | 2018-05-29 | 国网安徽省电力公司电力科学研究院 | A kind of oil loss tester of high automation |
| CN207472974U (en) * | 2017-12-05 | 2018-06-08 | 广东电网有限责任公司电力科学研究院 | A kind of device of GIS disc insulators dielectric loss test |
| CN108226654A (en) * | 2018-01-31 | 2018-06-29 | 深圳供电局有限公司 | Full-automatic dielectric loss measurement system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0418454A3 (en) * | 1989-09-21 | 1992-11-04 | Electro Scientific Industries, Inc. | Sliding contact test apparatus |
| US9086368B2 (en) * | 2011-02-24 | 2015-07-21 | International Business Machines Corporation | Non-destructive determination of the moisture content in an electronic circuit board using comparison of capacitance measurements acquired from test coupons, and design structure/process therefor |
| US9874603B2 (en) * | 2014-07-07 | 2018-01-23 | Avery Dennison Retail Information Services, Llc | System and method for capacitive coupling testing |
| CN108872649A (en) * | 2018-09-06 | 2018-11-23 | 国网山东省电力公司青州市供电公司 | A kind of cable determines phase auxiliary device |
-
2019
- 2019-02-14 CN CN201910113239.2A patent/CN109799370B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101592689A (en) * | 2008-05-26 | 2009-12-02 | 福建省普华电子科技有限公司 | Frequency-conversion anti-jamming dielectric loss all-digital measuring instrument and measuring method thereof |
| CN101387670A (en) * | 2008-10-21 | 2009-03-18 | 华南理工大学 | Dielectric loss on-line measurement apparatus for power capacitor |
| CN201673211U (en) * | 2010-05-28 | 2010-12-15 | 长沙金艺电子科技有限公司 | High-voltage dielectric loss testing apparatus |
| CN204719219U (en) * | 2015-05-20 | 2015-10-21 | 国网山西省电力公司电力科学研究院 | Dielectric loss tester verification insulator rack for experiment |
| CN205374520U (en) * | 2016-01-06 | 2016-07-06 | 云南电网有限责任公司电力科学研究院 | Capacitive character mutual -inductor dielectric loss measures termination |
| CN106066427A (en) * | 2016-06-16 | 2016-11-02 | 国网辽宁省电力有限公司锦州供电公司 | The dielectric loss test instrument of low capacity test product and using method thereof |
| CN207424103U (en) * | 2017-10-12 | 2018-05-29 | 国网安徽省电力公司电力科学研究院 | A kind of oil loss tester of high automation |
| CN207472974U (en) * | 2017-12-05 | 2018-06-08 | 广东电网有限责任公司电力科学研究院 | A kind of device of GIS disc insulators dielectric loss test |
| CN108226654A (en) * | 2018-01-31 | 2018-06-29 | 深圳供电局有限公司 | Full-automatic dielectric loss measurement system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109799370A (en) | 2019-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109799370B (en) | Dielectric loss test support | |
| CN202471902U (en) | 10 kv switch cabinet partial discharge detection testing system | |
| CN107390033B (en) | Composite insulating material frequency domain dielectric spectrum testing device | |
| CN114002561B (en) | Transformer bus copper bar insulating sleeve detection device and detection method | |
| CN106054044B (en) | Insulation test device for gas-filled cabinet | |
| CN202903958U (en) | An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer | |
| CN111610414A (en) | Combined type discharging generation device for simulating multiple kinds of discharging in transformer | |
| CN203101437U (en) | Electric field probe bracket for improving accuracy of monitoring power frequency electric field | |
| CN219016467U (en) | High tension switchgear insulating properties testing arrangement | |
| CN109541421B (en) | Corona aging test device for insulation sample | |
| CN113406392B (en) | Resistance measuring device and resistance measuring method in cable buffer layer ablation process | |
| CN201583598U (en) | High-voltage stator coil insulation dielectric loss test box | |
| CN206532896U (en) | A kind of bus tie and the switch cabinet combining structure using the connector | |
| CN210837426U (en) | Transformer core ground lead structure | |
| CN114545169A (en) | Switch cabinet internal discharge simulation system | |
| CN205982524U (en) | Aerify insulation test device for cabinet | |
| CN207851199U (en) | A kind of electrical-mechanical experimental test control device | |
| CN218727626U (en) | Insulator insulation effect detects uses auxiliary structure | |
| CN219874325U (en) | High-voltage bushing end screen grounding connection device | |
| CN219574272U (en) | Line fault checking instrument | |
| CN205404744U (en) | A electrode assembly for measuring composite insulator silicon rubber full skirt electrical strength | |
| CN219917912U (en) | Intelligent online temperature measurement contact box | |
| CN213750172U (en) | Pressure-resistant test device | |
| CN216645840U (en) | Long-acting contactor iron core service life test bench | |
| CN218940327U (en) | Mounting and fastening structure for internal element of high-voltage power distribution cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210406 Termination date: 20220214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |