CN113985077B - Electrical test wire clamp structure - Google Patents
Electrical test wire clamp structure Download PDFInfo
- Publication number
- CN113985077B CN113985077B CN202111260227.6A CN202111260227A CN113985077B CN 113985077 B CN113985077 B CN 113985077B CN 202111260227 A CN202111260227 A CN 202111260227A CN 113985077 B CN113985077 B CN 113985077B
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- China
- Prior art keywords
- clamping
- wire
- clamping piece
- conducting rod
- sleeve
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- 238000004804 winding Methods 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims description 15
- 239000011810 insulating material Substances 0.000 claims description 5
- 241000405070 Percophidae Species 0.000 claims description 4
- 210000002221 olecranon process Anatomy 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 235000014676 Phragmites communis Nutrition 0.000 claims description 2
- 206010014357 Electric shock Diseases 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Leads Or Probes (AREA)
Abstract
The invention discloses an electrical test wire clamp structure, which comprises: the seat cover is of a hollow tubular structure; the clamping part is arranged outside the seat sleeve and is provided with a compression assembly; detachable installs the conducting rod in the seat cover to and detachable connecting wire who connects on the conducting rod, connecting wire's tip is provided with connecting plug, wherein: further comprises: the wire winding assembly is used for accommodating the connecting wires, the wire winding assembly is connected with a miniature anti-leakage switch used for detecting whether the connecting wires leak electricity, the miniature anti-leakage switch is electrically connected with the connecting wires, and the conducting rod, the connecting wires, the miniature anti-leakage switch and the connecting plugs form an electric path. By implementing the electric test wire clamp structure, the safety risk of electric shock and short circuit in the use process can be reduced; the scratch to the clamping part to electrical equipment surface is reduced, the structure is simple, safe and reliable.
Description
Technical Field
The invention relates to the technical field of electrical tests, in particular to an electrical test wire clamp structure.
Background
In the prior art, the conventional wire clamp structure for the electrical test generally realizes electrical connection by utilizing the contact of the clamping part of the end part and equipment, and the prior electrical test wire clamp is unreasonable in structural design, so that loop short circuit among different terminals is easily caused in the installation process, and potential safety hazards of protection misoperation exist.
Meanwhile, the clamping parts of the electric test wire clamps are designed into saw-tooth shapes for ensuring good contact, and the conductive surfaces of the equipment are easy to scratch when the electric test wire clamps are connected to the conductive surfaces of the electrical equipment; in addition, the conventional electrical test wire clamp structure is inconvenient to store, and if the electric leakage condition is not easy to detect, certain damage can be caused.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an electric test wire clamp structure, which reduces the safety risks of electric shock and short circuit in the use process; the scratch to the clamping part to electrical equipment surface is reduced, the structure is simple, safe and reliable.
In order to solve the technical problem, the invention provides an electrical test wire clamp structure, which comprises: the seat cover is of a hollow tubular structure; the clamping part is arranged outside the seat sleeve and is provided with a compression assembly; detachable installs the conducting rod in the seat cover to and detachable connecting wire who connects on the conducting rod, connecting wire's tip is provided with connecting plug, wherein: further comprises: the wire winding assembly is used for accommodating the connecting wire, the wire winding assembly is connected with a miniature anti-leakage switch used for detecting whether the connecting wire leaks or not, the miniature anti-leakage switch is electrically connected with the connecting wire, and the conducting rod, the connecting wire, the miniature anti-leakage switch and the connecting plug form an electric path; an elastic piece is arranged in the seat sleeve, one end of the elastic piece is connected with the conductive rod, and the other end of the elastic piece is propped against the bottom of the seat sleeve; applying external force on the conducting rod, compressing the elastic piece, and pressing the conducting rod by the elastic piece to be tightly connected with external electrical equipment; the external force is removed, and the elastic piece and the conducting rod are reset; the clamping part comprises a first clamping piece and a second clamping piece which can clamp the electrical equipment, the first clamping piece and the second clamping piece form a clamping structure, and the end part of the clamping structure is of a olecranon type, a duckbill type or a bag type; the first clamping piece and the second clamping piece are respectively made of metal materials; the ends of the first clamping piece and the second clamping piece are respectively provided with a first insulating layer, and the other ends of the first clamping piece and the second clamping piece are respectively provided with a second insulating layer; two connecting columns are symmetrically arranged outside the seat sleeve, and two ends of the first clamping piece and the second clamping piece are respectively fastened on the connecting columns.
The coiling assembly comprises a coiling shell, a rotating shaft, a sleeve and a coiling reed; the coiling shell is a hollow cavity, the rotating shaft is arranged at the right center of the coiling shell, the sleeve is sleeved on the rotating shaft and penetrates through the outside of the coiling shell, and the coil spring sheet is arranged between the sleeve and the rotating shaft.
The pressing assembly is a pressing spring, the pressing spring penetrates through the first clamping piece and the second clamping piece respectively, and the end parts of the pressing spring are fastened on the first clamping piece and the second clamping piece respectively.
Wherein, connecting wire is the flexible wire, and connecting plug is hollow conductive copper tube structure, and connecting plug's surface cladding has the insulating layer.
Wherein, the seat cover is immersed with insulating paint or coated with insulating material.
The electric test wire clamp structure has the following beneficial effects: an electrical test wire clip structure comprising: the seat cover is of a hollow tubular structure; the clamping part is arranged outside the seat sleeve and is provided with a compression assembly; detachable installs the conducting rod in the seat cover to and detachable connecting wire who connects on the conducting rod, connecting wire's tip is provided with connecting plug, wherein: further comprises: the wire winding assembly is used for accommodating the connecting wires, the wire winding assembly is connected with a miniature anti-leakage switch used for detecting whether the connecting wires leak electricity, the miniature anti-leakage switch is electrically connected with the connecting wires, the conducting rod, the connecting wires, the miniature anti-leakage switch and the connecting plug form an electric path, and the safety risks of electric shock and short circuit in the use process are reduced; the scratch to the clamping part to electrical equipment surface is reduced, the structure is simple, safe and reliable.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electrical test wire clip according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the assembly of the seat cover, the clamping portion and the compressing assembly according to the embodiment of the present invention.
Fig. 3 is a schematic cross-sectional structure of the assembly of the seat cover, the conductive rod and the elastic member according to the embodiment of the present invention.
FIG. 4 is a schematic diagram showing an internal structure of a coil assembly according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1-4 show a first embodiment of the electrical test clip structure of the present invention.
The electrical test wire clamp structure in this embodiment includes: the seat cover 13, the seat cover 13 is a hollow tubular structure; a clamping part arranged outside the seat cover 13, wherein the clamping part comprises a first clamping piece 11 and a second clamping piece 12 which can clamp electric equipment, and the first clamping piece 11 and the second clamping piece 12 form a clamping structure. The clamping part is provided with a compression assembly 16; a detachable conductive rod 14 installed in the seat cover 13, and a detachable connection wire 19 connected to the conductive rod 14, wherein the end of the connection wire 19 is provided with a connection plug 20.
Further comprises: the wire winding assembly 17 for accommodating the connecting wire 19 is connected with the miniature anti-leakage switch 18 for detecting whether the connecting wire leaks or not, the miniature anti-leakage switch 18 is electrically connected with the connecting wire 19, and the conducting rod 14, the connecting wire 19, the miniature anti-leakage switch 18 and the connecting plug 20 form an electric path.
In specific implementation, the seat cover 13 is hollow and tubular, the first clamping piece 11 and the second clamping piece 12 are symmetrically arranged on the seat cover 13, and can move relative to the seat cover 13, and the electric equipment is clamped through interaction of the first clamping piece 11 and the second clamping piece 12. The first clamping member 11, the second clamping member 12 and the seat cover 13 are connected by the following structure.
Two connecting columns 131 are symmetrically arranged outside the seat cover 13, threads are arranged on the connecting columns 131, and two ends of the first clamping piece 11 and the second clamping piece 12 are respectively fastened on the connecting columns 131. The first clamping member 11 and the second clamping member 12 are movably disposed on the sleeve 13 by the interaction of the nut and the threads.
In particular, the two connecting posts 131 are integrally formed or assembled with the seat cover 13, for example: the two connecting posts 131 are symmetrically welded to the seat cover 13. In other embodiments, to better ensure insulating isolation of the clamping function, the sleeve 13 is impregnated with an insulating paint or with a coating of insulating material so as to isolate the electrically conductive path from the source from the electrical connection of the first clamping member 11 and the second clamping member 12.
Further, the jaw ends formed by the first clamping member 11 and the second clamping member 12 may be of a olecranon type, a duckbill type or a wrap-around type. Wherein: the olecranon type clamping part is convenient for adapting to the butt joint of the secondary terminal strip, the duckbill type clamping part is convenient for adapting to the butt joint of the plum blossom contact of the handcart type circuit breaker, and the bag type clamping part is convenient for adapting to the butt joint of the rectangular conductor.
In this embodiment, the combination of the first clamping member 11 and the second clamping member 12 is olecranon-shaped. The damage to the surface of the electrical equipment caused by the scratch of the clamping part and the quenching of the contact finger clamping spring due to the through flow is reduced.
The first clamping member 11 and the second clamping member 12 may be made of an insulating material or a metal material. Specifically, the first clamping member 11 and the second clamping member 12 are made of metal, and for better insulation, a first insulating layer 111 is provided at the head of the first clamping member 11 and the second clamping member 12, and a second insulating layer 112 is provided at the tail of the first clamping member 11 and the second clamping member 12; in other embodiments, the first clamping member 11 and the second clamping member 12 may be made of an insulating material.
Further, the pressing component 16 is a pressing spring, one end of the pressing spring is fixedly arranged at the upper end of the first clamping piece 11, the other end of the pressing spring is fixedly arranged at the upper end of the second clamping piece 12, and the pressing spring penetrates through the lower ends of the first clamping piece 11 and the second clamping piece 12 respectively. The pressing assembly 16 enables the first clamping member 11 and the second clamping member 12 to clamp the electrical apparatus while the first clamping member 11 and the second clamping member 12 return to the initial positions when the external force is removed.
In other embodiments, the compressing assembly 16 may also adopt two spiral springs, where two spiral springs are symmetrically disposed, one ends of the two spiral springs are respectively and fixedly disposed on the inner sides of the upper ends of the first clamping member 11 and the second clamping member 12, and the other ends of the two spiral springs are fixedly disposed on the seat cover 13, so that the clamping function of the clamping end portion is realized by the tensile force of the spiral springs. And the following steps: in other embodiments, the compressing assembly 16 may also use two spiral springs, where two spiral springs are symmetrically disposed, one ends of the two spiral springs are respectively and fixedly disposed on the outer sides of the upper ends of the first clamping member 11 and the second clamping member 12, and the other ends of the two spiral springs are fixedly disposed on the outer sides of the lower ends of the corresponding first clamping member 11 and second clamping member 12, so that the clamping function of the clamping end is achieved by the stretching force of the spiral springs.
Further, the conductive rod 14 is detachably installed in the seat cover 13, which is a cylindrical conductive metal that can move inside the seat cover 13. The tail end of the conducting rod 14 is welded with a connecting wire 19.
The elastic piece 15 is installed in the seat cover 13, one end of the elastic piece 15 is connected with the conducting rod 14, the other end of the elastic piece 15 is propped against the bottom of the seat cover, the elastic piece 15 in the embodiment is a spring, the lower end of the spring is connected with the seat cover 13, the upper end of the spring is connected with the conducting rod 14, the spring is a compression spring, a certain gap exists between rings of the compression spring, and when the spring is subjected to external load, the spring contracts and deforms to store deformation energy.
When an external force acts on the conducting rod 14 to enable the conducting rod to be in contact with electrical equipment, the spring is compressed, and meanwhile, the compression force of the spring acts on the conducting rod 14, so that the conducting rod 14 is tightly connected with the electrical equipment; when the external force is removed, the restoring force of the spring returns the conductive rod 14 to the original position.
Further, one end of the connecting wire 19 is detachably connected to the seat cover 13, the connecting wire 19 is electrically connected to the conductive rod 14, most of which is accommodated in the winding assembly 17, and the connecting wire 19 can be drawn out or rewound from the winding assembly 17 according to the requirement.
The miniature anti-leakage switch 18 is arranged in the coil winding assembly 17 or on the side edge, and is electrically connected with the connecting wire 19, and has the functions of: it is detected whether the connection wire 19 is leaking.
The tail end of the connecting wire 19 is electrically connected with the connecting plug 20, so that the conducting rod 14, the miniature anti-leakage switch 18, the connecting wire 19 and the connecting plug 20 form a complete electrical path. The electric path is independent of the clamping part structure formed by the seat cover, the clamping part and the pressing component.
The effect of this arrangement is: the clamp function and the electric connection function of the wire clamp are independently designed and do not interfere with each other, and the conductive loop is designed in a limited space, so that the safety risk of electric shock and short circuit in the use process is reduced.
Further, the winding assembly 17 includes a winding housing 171, a rotating shaft 172, a sleeve 173, and a coil spring blade 174; the wire winding casing 171 is a hollow cavity, and a wire outlet 1711 is provided at a side of the wire winding casing 171. The rotation shaft 172 is installed at the center of the winding housing 171, the sleeve 173 is sleeved on the rotation shaft 172 and penetrates the outside of the winding housing 171, and the coil spring sheet 174 is installed between the sleeve 173 and the rotation shaft 172. In particular, the coil spring sheet 174 is connected with the rotating shaft 172, and the connecting wire 19 can be coiled through interaction of the rotating shaft 172, the sleeve 173 and the coil spring sheet 174, so that the connecting wire 19 can be stored and stored conveniently.
Preferably, the connecting wires 19 are flexible wires, the connecting plug 20 is of a hollow conductive copper tube structure, and the outer surface of the connecting plug 20 is coated with an insulating layer. The effect of this arrangement is: the soft connecting wire can realize the effective buffering between wire and the end part of the clamp, and the condition that the end part of the clamp falls off due to careful wire pulling is prevented in the process of test.
It will be appreciated that: the connection wire 19 is detachably connected with the conductive rod 14 through the arrangement of the through wire winding assembly 17, so that the connection wire 19 is convenient to store and store; by providing the miniature anti-leakage switch 18, the danger of electric shock which may occur due to leakage is prevented.
The electric test wire clamp structure has the following beneficial effects:
the first conductive rod, the miniature anti-leakage switch, the connecting wire and the connecting plug form a complete electric path. The electric path is mutually independent of the clamping part structure formed by the seat cover, the clamping part and the pressing component, so that the clamping function and the electric connection function of the wire clamp are not mutually interfered, and the conductive loop is designed in a limited space, so that the safety risk of electric shock and short circuit in the use process is reduced.
And the end parts of the clamping jaws formed by the second clamping piece, the first clamping piece and the second clamping piece are olecranon-type, so that the scratch of the clamping part on the surface of the electrical equipment and the damage of the contact finger clamping spring due to quenching caused by through flow are reduced.
Thirdly, the seat cover, the conducting rod and the elastic piece are assembled, so that the conducting contact is ensured to be reliable, and meanwhile, buffering is provided when an external test wire is connected, and the wiring is more reliable and is not easy to fall off.
Fourthly, the arrangement of the winding assembly and the detachable connection structure for connecting the lead and the conducting rod are convenient for the storage and the storage of the connecting lead; through the arrangement of the miniature anti-leakage switch, the electric shock danger possibly caused by electric leakage is effectively prevented.
Fifth, the structure is simple, safe and reliable.
Claims (5)
1. An electrical test wire clamp structure, comprising:
the seat sleeve is of a hollow tubular structure;
the clamping part is arranged outside the seat cover, and a pressing assembly is arranged on the clamping part;
a detachable conductive rod arranged in the seat sleeve, and
the detachable connection is in connecting wire on the conducting rod, connecting plug is provided with to connecting wire's tip, wherein:
further comprises: the wire winding assembly is used for accommodating the connecting wire, a miniature anti-leakage switch used for detecting whether the connecting wire leaks is connected to the wire winding assembly, the miniature anti-leakage switch is electrically connected with the connecting wire, and the conducting rod, the connecting wire, the miniature anti-leakage switch and the connecting plug form an electric passage;
an elastic piece is arranged in the seat sleeve, one end of the elastic piece is connected with the conducting rod, and the other end of the elastic piece is propped against the bottom of the seat sleeve; applying external force on the conducting rod, compressing the elastic piece, and pressing the elastic piece against the conducting rod to be tightly connected with external electrical equipment; the external force is removed, and the elastic piece and the conducting rod are reset;
the clamping part comprises a first clamping piece and a second clamping piece which can clamp electric equipment, the first clamping piece and the second clamping piece form a clamping structure, the end part of the clamping structure is of a olecranon type, a duckbill type or a bag clamping type, and the first clamping piece and the second clamping piece are respectively made of metal materials; the ends of the first clamping piece and the second clamping piece are respectively provided with a first insulating layer, and the other ends of the first clamping piece and the second clamping piece are respectively provided with a second insulating layer; the outside symmetry of seat cover is equipped with two spliced poles, first clamping piece with the both ends of second clamping piece are fastened respectively on the spliced pole.
2. The electrical test clamp structure of claim 1, wherein the wire winding assembly comprises: the coiling shell, the rotating shaft, the sleeve and the coiling reed; the coiling shell is a hollow cavity, the rotating shaft is arranged at the center of the coiling shell, the sleeve is sleeved on the rotating shaft and penetrates through the outside of the coiling shell, and the coil spring sheet is arranged between the sleeve and the rotating shaft.
3. The electrical test clamp structure of claim 1, wherein the compression assembly is a compression spring that extends through the first and second clamps, respectively, and ends of the compression spring are secured to the first and second clamps, respectively.
4. The electrical test clamp structure of claim 1, wherein the connecting wires are flexible wires, the connecting plug is a hollow conductive copper tube structure, and an insulating layer is coated on the outer surface of the connecting plug.
5. The electrical test clip structure of claim 1, wherein the sleeve is impregnated with an insulating paint or coated with an insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111260227.6A CN113985077B (en) | 2021-10-28 | 2021-10-28 | Electrical test wire clamp structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111260227.6A CN113985077B (en) | 2021-10-28 | 2021-10-28 | Electrical test wire clamp structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113985077A CN113985077A (en) | 2022-01-28 |
| CN113985077B true CN113985077B (en) | 2024-01-02 |
Family
ID=79743053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111260227.6A Active CN113985077B (en) | 2021-10-28 | 2021-10-28 | Electrical test wire clamp structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113985077B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201192331Y (en) * | 2008-03-21 | 2009-02-11 | 杨晓峰 | Medical endoscope system anti-creep beaming powder line |
| CN204065171U (en) * | 2014-06-25 | 2014-12-31 | 国家电网公司 | A kind of telescopic electric test wire |
| CN104269670A (en) * | 2014-10-29 | 2015-01-07 | 国家电网公司 | Special jointing clamp for inserting hole type terminal strip test wire |
| CN105116180A (en) * | 2015-09-08 | 2015-12-02 | 国网山东省电力公司经济技术研究院 | Portable test shorting stub device |
| CN207742254U (en) * | 2017-12-05 | 2018-08-17 | 国网江西省电力有限公司上饶供电分公司 | A kind of absorption type breaker loop resistor testing tool |
| 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 |
| CN112014603A (en) * | 2020-09-04 | 2020-12-01 | 国网山东省电力公司莱芜供电公司 | Self-contained high-voltage test short-circuit wire device and using method thereof |
| CN112678622A (en) * | 2020-12-14 | 2021-04-20 | 国网山东省电力公司烟台供电公司 | Wire clamp of power storage battery internal resistance tester |
-
2021
- 2021-10-28 CN CN202111260227.6A patent/CN113985077B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201192331Y (en) * | 2008-03-21 | 2009-02-11 | 杨晓峰 | Medical endoscope system anti-creep beaming powder line |
| CN204065171U (en) * | 2014-06-25 | 2014-12-31 | 国家电网公司 | A kind of telescopic electric test wire |
| CN104269670A (en) * | 2014-10-29 | 2015-01-07 | 国家电网公司 | Special jointing clamp for inserting hole type terminal strip test wire |
| CN105116180A (en) * | 2015-09-08 | 2015-12-02 | 国网山东省电力公司经济技术研究院 | Portable test shorting stub device |
| CN207742254U (en) * | 2017-12-05 | 2018-08-17 | 国网江西省电力有限公司上饶供电分公司 | A kind of absorption type breaker loop resistor testing tool |
| 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 |
| CN112014603A (en) * | 2020-09-04 | 2020-12-01 | 国网山东省电力公司莱芜供电公司 | Self-contained high-voltage test short-circuit wire device and using method thereof |
| CN112678622A (en) * | 2020-12-14 | 2021-04-20 | 国网山东省电力公司烟台供电公司 | Wire clamp of power storage battery internal resistance tester |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113985077A (en) | 2022-01-28 |
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