CN107425309B - Electrical test clamp for wiring at ground operation high place - Google Patents
Electrical test clamp for wiring at ground operation high place Download PDFInfo
- Publication number
- CN107425309B CN107425309B CN201710161598.6A CN201710161598A CN107425309B CN 107425309 B CN107425309 B CN 107425309B CN 201710161598 A CN201710161598 A CN 201710161598A CN 107425309 B CN107425309 B CN 107425309B
- Authority
- CN
- China
- Prior art keywords
- wire
- test
- rod
- tiger
- insulating rod
- 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
- 241000282376 Panthera tigris Species 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000012212 insulator Substances 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
- H01R11/22—End pieces terminating in a spring clip
- H01R11/24—End pieces terminating in a spring clip with gripping jaws, e.g. crocodile clip
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/20—Connectors or connections adapted for particular applications for testing or measuring purposes
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Measuring Leads Or Probes (AREA)
Abstract
The invention provides the electric test fixture for the ground operation high wiring, which has the advantages of simple connection, simple operation, convenient use, high operation efficiency, good safety, easy disassembly and easy assembly; the technical scheme adopted is as follows: the insulating rod is of a hollow telescopic rod structure, a plurality of sections of telescopic rod units are connected together in an embedded mode, a connector is movably arranged at the upper end of the insulating rod, the connector is inserted at the top of the insulating rod and can rotate 360 degrees around the axial direction of the insulating rod, the steering rod and the connector are arranged in parallel, the steering rod and the connector are fixed together through bolts, and the tiger chuck is fixedly arranged at the top of the steering rod; the upper end of acting as go-between is fixed in the through wires hole, and the lower extreme is located the lower part of insulator spindle, and is provided with the stay wire ring, and the tooth interlock of tiger chuck is on the electric wire through pulling the stay wire ring, and tiger chuck and steering column fixed point are connected with the test wire, and the lower extreme of test wire is connected on the test box on ground, and the test wire is through tooth interlock electric wire with the high-voltage electricity leading-in test box on ground.
Description
Technical Field
The invention relates to an electric test fixture for wiring at a ground operation height, belonging to the technical field of high-voltage test auxiliary tools.
Background
The power equipment often needs to carry out some necessary inspections and experiments, and some electrical equipment installed at high places need the testers to climb to the wiring of high places when carrying out experiments, climb up and climb down many times like this, bring a lot of difficulty for test work, can not guarantee the safety of testers moreover. When the transformer substation is inspected for one time, the transformer substation can relate to a plurality of tests such as loop resistance, current rising, insulation inspection and the like of equipment such as a breaker, a disconnecting switch and the like. The existing wire clamps for electric tests are all ground operations, and when high-altitude equipment (such as a transformer, a circuit breaker and a disconnecting switch) is to be measured, the high-altitude equipment is often climbed to the equipment to be connected by means of an insulating arm car or manpower. In actual operation, there are places where the insulated boom car or the manpower climbing cannot reach, for example, when the equipment in the station is too dense to cause insufficient space for the insulated boom car or the personnel to operate, which directly affects the measurement work and complicates the measurement work; in addition, when the wiring is required to be changed in the test process, the insulating arm trolley is required to be reused, or high-altitude operators are required to carry enough wiring, so that the operation inefficiency is caused, the risk factors of the high-altitude operation are increased, and a plurality of potential safety hazards exist.
Disclosure of Invention
The invention overcomes the defects existing in the prior art and provides the electric test fixture for the ground operation high wiring, which has the advantages of simple connection, simple operation, convenient use, high operation efficiency, good safety, easy disassembly and easy assembly.
In order to solve the technical problems, the invention adopts the following technical scheme: the electric test fixture for the ground operation high-place wiring comprises an insulating rod, a steering rod and a tiger chuck, wherein the insulating rod is of a hollow telescopic rod structure, a plurality of telescopic rod units are connected together in an embedded mode, a joint is movably arranged at the upper end of the insulating rod, the joint is sleeved at the top of the insulating rod and can rotate 360 degrees around the axial direction of the insulating rod, the steering rod and the joint are arranged in parallel, the steering rod and the joint are fixed together through bolts, and the tiger chuck is fixedly arranged at the top of the steering rod;
the tiger chuck has the structure that: the wire clamping device comprises a left clamping piece, a right clamping piece and a torsion spring, wherein the left clamping piece and the right clamping piece are arranged in a cross hinge manner, the torsion spring for resetting is arranged at a hinge position, serrated teeth are arranged on the inner sides of the upper parts of the hinge positions of the left clamping piece and the right clamping piece and are used for occluding wires, two movable ends are arranged at the lower parts of the hinge positions of the left clamping piece and the right clamping piece, one movable end is fixed on a steering rod through a locking bolt, and a threading hole for fixing a pull wire is formed in the other end;
the upper end of acting as go-between is fixed in the through wires hole, and the lower extreme is located the lower part of insulator spindle, and is provided with the stay wire ring, and the tooth interlock of tiger chuck is on the electric wire through pulling the stay wire ring, tiger chuck and steering column fixed part are connected with the test wire, the lower extreme of test wire is connected on the test box on ground, the test wire is through tooth interlock electric wire with the one end of electrical equipment connecting piece lead into in the test box on ground.
The steering rod is provided with a wire passing hole corresponding to the threading hole, a wire passing hole wheel is arranged at the outlet of the wire passing hole, and the stay wire passes through the wire passing hole and extends to the lower part of the insulating rod through the wire passing hole wheel.
Be provided with a plurality of rings of crossing the line on the insulator spindle, be used for cross-under stay wire and test line in crossing the line ring, and cross-under stay wire and test line cross-over line ring be located the both sides of insulator spindle respectively.
The middle part of the insulating rod is provided with a wire passing wheel, the fixed end of the wire passing wheel is fixed on the insulating rod in an inserting way, and the wire passing wheel is used for transitional stay wire.
Compared with the prior art, the invention has the following beneficial effects: the clamping head is driven by the stay wire, so that an operator can easily control the opening and closing of the clamping head on the ground, and the clamping head is very practical in electric power overhaul production work as a high-voltage test clamp. The staff can carry out the clamp of test wire on ground and connect, and this instrument convenient to use, dismantlement are simple, the transmission is stable firm, can effectively improve high-voltage test's operational safety and work efficiency.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
In the figure: the wire guide device comprises an insulating rod 1, a steering rod 2, a tiger chuck 3, a left clamp 31, a right clamp 32, a torsion spring 33, teeth 34, a threading hole 35, a connector 4, a pull wire 5, a wire loop 6, a test wire 7, a test box 8, a wire passing hole 9, a wire passing hole wheel 10, a wire passing circular ring 11 and a wire passing wheel 12.
Detailed Description
As shown in fig. 1, the electric test fixture for ground operation high-altitude wiring comprises an insulating rod 1, a steering rod 2 and a tiger chuck 3, wherein the insulating rod 1 is of a hollow telescopic rod structure, a plurality of telescopic rod units are connected together in an embedded mode, a joint 4 is movably arranged at the upper end of the insulating rod 1, the joint 4 is sleeved at the top of the insulating rod 1 and can rotate around the insulating rod 1 by 360 degrees in the axial direction, the steering rod 2 and the joint 4 are arranged in parallel, the steering rod 2 and the joint 4 are fixed together through bolts, and the tiger chuck 3 is fixedly arranged at the top of the steering rod 2;
the tiger chuck 3 has the structure that: the wire clamping device comprises a left clamping piece 31, a right clamping piece 32 and a torsion spring 33, wherein the left clamping piece 31 and the right clamping piece 32 are arranged in a cross hinged manner, the torsion spring 33 for resetting is arranged at the hinged position, serrated teeth 34 are arranged on the inner side of the upper part of the hinged position of the left clamping piece 31 and the right clamping piece 32 and are used for clamping wires, two movable ends are arranged at the lower part of the hinged position of the left clamping piece 31 and the right clamping piece 32, one movable end is fixed on a steering rod 2 through a locking bolt, and a threading hole 35 used for fixing a wire 5 is formed in the other end;
the upper end of the stay wire 5 is fixed in the threading hole 35, the lower end is located at the lower portion of the insulating rod 1, a stay wire ring 6 is arranged, teeth 34 of the tiger chuck 3 are meshed on an electric wire by pulling the stay wire ring 6, a test wire 7 is connected to the fixed position of the tiger chuck 3 and the steering rod 2, the lower end of the test wire 7 is connected to a test box 8 on the ground, and one end of an electrical equipment connecting piece is led into the test box on the ground by the test wire 7 through the teeth 34 meshed with the electric wire.
The steering rod 2 is provided with a wire passing hole 9 corresponding to the threading hole 35, a wire passing hole wheel 10 is arranged at the outlet of the wire passing hole 9, and the stay wire 5 passes through the wire passing hole 9 and extends to the lower part of the insulating rod 1 through the wire passing hole wheel 10.
Be provided with a plurality of wire rings 11 that cross on the insulator spindle 1, be used for cross-under to act as go-between 5 and test line 7 in the wire rings 11, and cross-under is acted as go-between 5 and the wire rings 11 that cross-under is passed as go-between 7 are located the both sides of insulator spindle 1 respectively.
The middle part of the insulating rod 1 is provided with a wire passing wheel 12, the fixed end of the wire passing wheel 12 is fixed on the insulating rod 1 in a penetrating way, and the wire passing wheel 12 is used for winding the wire 5.
The wire passing hole wheel 10 is arranged in the fixture, and can smoothly pass through the wire 5 without falling off, and the wire fixing button is screwed by a jackscrew and is used for fixing one end of the wire 5.
The steering fixing head is rotationally fixed on the steering rod, so that the direction of the tiger chuck can be changed. The wire passing wheel is fixed on the insulating rod in a threaded manner, can pass through a pull wire and cannot be pulled out. The thread-passing ring is fixed on the insulating rod in a threaded manner and can be pulled by a pull wire. One end of the stay wire is fixed tightly by a stay wire fixing button after being pulled through a handle of the wire ring wire passing wheel wire passing hole wheel tiger head clamp.
The connector is rotary, so that the upper end of the insulating rod is connected with the lower half part of the steering rod, and the installation and removal functions are achieved.
The insulating rod is a hollow rod, multiple sections of embedded connection are adopted, and the length of the insulating rod can be adjusted according to the height of the equipment. The locking bolt can be connected with the test line and is connected with the tiger head clamp, and is locked at the same time.
The tool is provided with two sets, one set is connected with one end of the tested equipment, and the other set is connected with the other end of the equipment or the grounding body.
The application method of the invention comprises the following steps:
1. firstly, connecting the tiger head wire clamp with a steering rod, unscrewing a screwing screw to penetrate into a test wire, inserting one end of the tiger head wire clamp into the head of the steering rod, and fastening.
2. The other end of the steering rod and the head of the insulating rod are screwed tightly.
3. The wire passing wheel and the wire passing ring are arranged at the proper positions of the insulating rod.
4. The stay wire is screwed by a screwing screw through the wire passing ring, the wire passing wheel, the wire passing hole wheel and the other handle of the tiger chuck.
5. And adjusting the clamp and the steering rod according to the angle and the direction of the test wiring, and fixing the clamp and the steering rod tightly.
6. And pulling the telescopic rod according to the height of the test equipment, and tightening the telescopic rod.
7. The other end of the wire is connected.
8. The tiger head clamp is opened by tightening the stay wire and placed at the joint of the equipment, the stay wire is loosened, and the tiger head clamp clamps the tested equipment.
9. And the other clamp for high-level test is connected in a similar way.
10. After the test is completed, the procedure is reversed and the tool can be retracted.
11. The manufacturing key points of the high-altitude test clamp are as follows:
(1) The mechanical strength and the insulating strength of the insulating rod can bear the whole device without breaking, the insulating strength ensures the potential isolation between the top and the bottom of the insulating rod isolating device, and the insulating rod is made of high-strength composite glass fiber reinforced plastic.
(2) The strength of the spring structure in the chuck, because the loop resistance wire clamp requires high clamping tightness of the wire clamp, the spring force and strength are required to meet the requirements.
(3) Alloy materials are required for clamping the clamping head to ensure that the contact resistance between the clamping head and the breaker and the isolating knife switch clamp is very small.
(4) The current wire requires a rough current wire for test, and can withstand a large current.
(5) The wire is an inelastic insulated rough fishing wire.
The clamping head is driven by the stay wire, so that an operator can easily control the opening and closing of the clamping head on the ground, and the clamping head is very practical in electric power overhaul production work as a high-voltage test clamp. The staff can carry out the clamp of test wire on ground and connect, and this instrument convenient to use, dismantlement are simple, the transmission is stable firm, can effectively improve high-voltage test's operational safety and work efficiency.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (1)
1. The electric test clamp for the ground operation high-altitude wiring is characterized by comprising an insulating rod (1), a steering rod (2) and a tiger chuck (3), wherein the insulating rod (1) is of a hollow telescopic rod structure, a plurality of telescopic rod units are connected together in an embedded mode, a connector (4) is movably arranged at the upper end of the insulating rod (1), the connector (4) is sleeved at the top of the insulating rod (1) and can rotate 360 degrees around the axial direction of the insulating rod (1), the steering rod (2) and the connector (4) are arranged in parallel, the steering rod (2) and the connector (4) are fixed together through bolts, and the tiger chuck (3) is fixedly arranged at the top of the steering rod (2);
the tiger chuck (3) has the structure that: the wire clamping device comprises a left clamping piece (31), a right clamping piece (32) and a torsion spring (33), wherein the left clamping piece (31) and the right clamping piece (32) are arranged in a cross hinged mode, the torsion spring (33) used for resetting is arranged at a hinged position, serrated teeth (34) are arranged on the inner side of the upper portion of the hinged position of the left clamping piece (31) and the right clamping piece (32) and used for occluding wires, two movable ends are arranged at the lower portion of the hinged position of the left clamping piece (31) and the lower portion of the right clamping piece (32), one movable end is fixed on a steering rod (2) through a locking bolt, and a threading hole (35) used for fixing a stay wire (5) is formed in the other end portion of the torsional spring;
the upper end of the stay wire (5) is fixed in the threading hole (35), the lower end of the stay wire is positioned at the lower part of the insulating rod (1), a stay wire ring (6) is arranged, teeth (34) of the tiger clamp (3) are meshed on the electric wire by pulling the stay wire ring (6), a test wire (7) is connected to the fixed part of the tiger clamp (3) and the steering rod (2), the lower end of the test wire (7) is connected to a test box (8) on the ground, and one end of an electrical equipment connecting piece is led into the test box on the ground by the test wire (7) through the teeth (34) meshed with the electric wire;
a wire passing hole (9) is formed in the steering rod (2) corresponding to the threading hole (35), a wire passing hole wheel (10) is arranged at the outlet of the wire passing hole (9), and the stay wire (5) passes through the wire passing hole (9) and extends to the lower part of the insulating rod (1) through the wire passing hole wheel (10);
a plurality of wire passing circular rings (11) are arranged on the insulating rod (1), the wire passing circular rings (11) are internally used for being connected with the stay wire (5) and the test wire (7) in a penetrating way, and the wire passing circular rings (11) connected with the stay wire (5) and the test wire (7) in a penetrating way are respectively positioned at two sides of the insulating rod (1);
a wire passing wheel (12) is arranged in the middle of the insulating rod (1), the fixed end of the wire passing wheel (12) is fixedly inserted on the insulating rod (1), and the wire passing wheel (12) is used for transiting a stay wire (5);
the application method of the electric test clamp for the ground operation high-place wiring comprises the following steps:
1. firstly, connecting a tiger head wire clamp with a steering rod, unscrewing a screwing screw to penetrate into a test wire, inserting one end of the tiger head wire clamp into the head of the steering rod, and fastening;
2. the other end of the steering rod and the head of the insulating rod are screwed tightly;
3. installing a wire passing wheel and a wire passing ring at a proper position of an insulating rod;
4. the stay wire passes through the wire passing ring, the wire passing wheel, the wire passing hole wheel and the other handle of the tiger chuck and is screwed by a screwing screw;
5. according to the angle and direction of the test wiring, adjusting the clamp and the steering rod, and fixing tightly;
6. pulling the telescopic rod according to the height of the test equipment, and tightening the telescopic rod;
7. the other end of the connecting wire;
8. the tiger head clamp is opened by tightening the stay wire and is placed at the joint of the equipment, the stay wire is loosened, and the tiger head clamp clamps the tested equipment;
9. connecting the other clamp for high-level test in the same way;
10. after the test is completed, the procedure is reversed and the tool can be retracted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710161598.6A CN107425309B (en) | 2017-03-17 | 2017-03-17 | Electrical test clamp for wiring at ground operation high place |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710161598.6A CN107425309B (en) | 2017-03-17 | 2017-03-17 | Electrical test clamp for wiring at ground operation high place |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107425309A CN107425309A (en) | 2017-12-01 |
| CN107425309B true CN107425309B (en) | 2024-03-15 |
Family
ID=60423807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710161598.6A Active CN107425309B (en) | 2017-03-17 | 2017-03-17 | Electrical test clamp for wiring at ground operation high place |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107425309B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239408A (en) * | 2018-08-23 | 2019-01-18 | 国网天津市电力公司 | A kind of multipurpose flash test pincers |
| CN109580994A (en) * | 2018-11-27 | 2019-04-05 | 国家电网有限公司 | A kind of test wire jointer with voltage monitored and assist storage function |
| CN109901036A (en) * | 2019-04-03 | 2019-06-18 | 云南电力技术有限责任公司 | A kind of lead regulating device for high potential test for electric equipment |
| CN114088988A (en) * | 2021-10-15 | 2022-02-25 | 国网辽宁省电力有限公司朝阳供电公司 | Portable high-altitude equipment measuring combination device and using method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203422399U (en) * | 2013-08-12 | 2014-02-05 | 国家电网公司 | High-altitude test clamp for high-voltage tests |
| CN203422397U (en) * | 2013-07-31 | 2014-02-05 | 国家电网公司 | Lead wire joint fixing grounding tool for high voltage test |
| CN106054033A (en) * | 2016-05-19 | 2016-10-26 | 天津送变电工程公司 | Withstand voltage test wire telescopic insulating support and safe test method |
| CN206789732U (en) * | 2017-03-17 | 2017-12-22 | 国家电网公司 | A kind of electric test fixture of terrestrial operation eminence wiring |
-
2017
- 2017-03-17 CN CN201710161598.6A patent/CN107425309B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203422397U (en) * | 2013-07-31 | 2014-02-05 | 国家电网公司 | Lead wire joint fixing grounding tool for high voltage test |
| CN203422399U (en) * | 2013-08-12 | 2014-02-05 | 国家电网公司 | High-altitude test clamp for high-voltage tests |
| CN106054033A (en) * | 2016-05-19 | 2016-10-26 | 天津送变电工程公司 | Withstand voltage test wire telescopic insulating support and safe test method |
| CN206789732U (en) * | 2017-03-17 | 2017-12-22 | 国家电网公司 | A kind of electric test fixture of terrestrial operation eminence wiring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107425309A (en) | 2017-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107425309B (en) | Electrical test clamp for wiring at ground operation high place | |
| CN203422399U (en) | High-altitude test clamp for high-voltage tests | |
| CN202454746U (en) | High-altitude wiring pliers with built-in wire | |
| CN203385761U (en) | Wiring clamp for loop resistor measuring and overpressure resistant test | |
| CN102411068A (en) | Multifunctional wiring operating lever used for test of high-altitude electrical equipment | |
| CN202126444U (en) | Multifunctional wiring operation rod for tests of high-altitude electric equipment | |
| CN201548642U (en) | Junction pole for high voltage test | |
| CN106443085B (en) | Telescopic high-altitude wiring device | |
| CN203732572U (en) | Telescopic high-altitude wire clamp | |
| CN102944705A (en) | Tool for alternating current-direct current high voltage holding test | |
| CN115047299A (en) | Transmission line insulator detection device based on unmanned aerial vehicle | |
| CN206789732U (en) | A kind of electric test fixture of terrestrial operation eminence wiring | |
| CN204103354U (en) | Charged for replacement 110kV-2200kV strain insulator string special tool utensil | |
| CN114551092A (en) | Special discharging device for power capacitor | |
| CN215910264U (en) | Transformer bushing bending test device | |
| CN210006950U (en) | Portable wire clamp for testing current transformer in high-voltage switch cabinet | |
| CN105301298B (en) | Separated time fixture for power transformer automatic detection | |
| CN106940402A (en) | For high-power transformer and the special testing tool of bulky switch D.C. resistance | |
| CN112636029A (en) | High-voltage cable butt-joint box grounding wire with clamping rods and use method | |
| CN219625532U (en) | Special insulating support of large-scale transformer test | |
| CN104020325A (en) | High-voltage test shielding cover for 10kV ring main unit | |
| CN110620345A (en) | 10kV middle-placed switch cabinet bus grounding rod | |
| CN216958793U (en) | Discharging rod for power capacitor | |
| CN203502442U (en) | High-voltage test auxiliary device used for 10kV oxide lightning arrester | |
| CN217306763U (en) | A insulating fixing device of fastener for transformer detects |
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 |