CN112698074A - Adjustable current transformer secondary circuit short-circuit tool with insulating handle - Google Patents
Adjustable current transformer secondary circuit short-circuit tool with insulating handle Download PDFInfo
- Publication number
- CN112698074A CN112698074A CN202011439730.3A CN202011439730A CN112698074A CN 112698074 A CN112698074 A CN 112698074A CN 202011439730 A CN202011439730 A CN 202011439730A CN 112698074 A CN112698074 A CN 112698074A
- Authority
- CN
- China
- Prior art keywords
- short
- circuit
- current transformer
- sheath
- adjustable
- 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.)
- Pending
Links
Images
Landscapes
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
The invention provides an adjustable short circuit tool for a secondary circuit of a current transformer with an insulating handle, which comprises an operating handle and a conductive bar fixedly connected with the operating handle; connecting pieces are arranged on the conductive bars at equal intervals; an adjustable banana plug is arranged on the connecting piece. According to the adjustable current transformer secondary circuit short-circuit tool with the insulating handle, provided by the invention, a maintainer can install the banana plug on the connecting piece according to the condition of a terminal which needs to be short-connected actually, so that the short-circuit operation of different circuits can be well adapted, the problem of blockage during operation is avoided to a certain extent, and the operation of the maintainer is facilitated; in the realization process, the operating handle is handed to the maintainer, and the banana plug that will install is pegged graft and is gone into the terminal that needs the short circuit, because connecting piece, the inside connection structure of leading electrical drainage all are the conductor, and the outside is insulation system, when realizing the short circuit operation, has improved the security of maintenance operation.
Description
Technical Field
The invention relates to the field of maintenance of secondary circuits of current transformers, in particular to an adjustable short-circuit tool for a secondary circuit of a current transformer with an insulating handle.
Background
The current transformer is an important component in power generation, transformation, transmission, distribution and utilization systems of power systems, is a current conversion device, and can convert large current on a primary side into small current on a secondary side for a protection device and a measuring instrument to use. In operation, due to the reasons that the secondary wiring terminal joint is not tightly pressed, the quality of components such as a current terminal is poor, the installation process is poor, materials are oxidized and corroded, the secondary circuit of the current transformer is poor in contact and even is opened, so that the safe operation of equipment is affected, high voltage is induced on a secondary coil when the secondary circuit is opened, the peak value of the high voltage can reach thousands of volts or even tens of thousands of volts, and personal safety and equipment safety are seriously threatened.
At present, the defects of poor contact or open circuit and the like of a secondary circuit of a current transformer in operation are eliminated, and the current transformer has two processing modes of power failure and power failure, and has the following problems respectively:
the power failure processing mode needs to power off the interval equipment where the current transformer is located, so that the system operation and the user power supply reliability are reduced, and meanwhile, the workload of operation of operators is increased.
The processing mode that does not have a power failure then needs to use the experimental shorting stub of conventional current, disappears again after eliminating the overvoltage with the current transformer secondary circuit current terminal short circuit of fault point, however, because this shorting stub plug holds the position short and small, and must wear insulating gloves for the staff when considering the operation for personal safety, so very easily block the sight to lead to the adjacent operation current terminal of short circuit of mistake, moreover, this shorting stub is difficult to be held tightly, and man-machine work efficiency is very poor.
The invention patent with publication number CN104007357A discloses a short-circuit device for a secondary circuit of a current transformer, which comprises a fixed body, an insertion rod, an expansion rod, a sliding semicircular sleeve, a conducting strip and a knob; symmetrical holes are formed in the outer surface of the insertion rod, expansion strips are arranged in the holes, and protruding portions are arranged on the inner surfaces of the expansion strips; the expansion rod is arranged in the insertion rod in a sliding manner; the top end of the insertion rod is fixed in the fixing body; the sliding semicircular sleeve is in sliding contact with the outer surface of the insertion rod; the rotating shaft is fixed in the fixing body and positioned above the insertion rod, the middle position of the pressing strip is fixed on the rotating shaft, and two ends of the pressing strip are respectively contacted with the top end of the sliding semicircular sleeve and the top end of the expansion rod; the number of the inserting rods is two; the connecting shaft is vertically arranged in the fixed body, the connecting shaft is positioned between the two insertion rods, the middle position of the conducting strip is connected with the connecting shaft, and the knob is arranged at the top of the fixed body and connected with the connecting shaft. Although the scheme of the invention can stabilize the installation of the short-circuit device, the safety problem and the sight problem existing in the short-circuit work cannot be solved.
Disclosure of Invention
The invention provides an adjustable current transformer secondary circuit short-circuit tool with an insulating handle, aiming at overcoming the technical defects that in the current transformer secondary circuit short-circuit work, an operator has safety problems and the sight line is blocked during operation.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an adjustable short circuit tool for a secondary circuit of a current transformer with an insulating handle comprises an operating handle and a conductive bar fixedly connected with the operating handle; connecting pieces are arranged on the conductive bars at equal intervals; an adjustable banana plug is arranged on the connecting piece.
In the scheme, the maintainers install the banana plugs on the connecting pieces according to the conditions of terminals needing short circuit actually, so that the banana connectors can adapt to short circuit operation of different circuits well, the problem of blocking during operation is avoided to a certain extent, and the operation of the maintainers is facilitated; in the realization process, the operating handle is handed to the maintainer, and the banana plug that will install is pegged graft and is gone into the terminal that needs the short circuit, because connecting piece, the inside connection structure of leading electrical drainage all are the conductor, and the outside is insulation system, when realizing the short circuit operation, has improved the security of maintenance operation.
The operating handle is provided with an insulating sheath, and the insulating sheath is provided with anti-skidding threads.
In the above scheme, the operating handle is made of epoxy resin wrapped polyvinyl chloride insulating sheath materials, the length and the diameter of the handle can be customized, the requirement on human-machine efficacy is met, the anti-skidding threads are distributed at equal intervals, and the problem that a short connection tool is difficult to hold tightly is solved.
In the scheme, the conducting bar is arranged at the bottom end of the operating handle and is made of copper silver-plated material; a polyvinyl chloride insulating sheath is coated outside, and the withstand voltage is more than 1 kV; the thickness of the conductive bar can be customized according to the strength requirement of a use occasion, the width meets the installation requirement of the banana plug, and the length meets the requirement of four current terminals for short circuit simultaneously.
In the above scheme, operating handle, electrically conductive row adopt integrated structural design, and the whole injection moulding of outsourcing polyvinyl chloride insulating sheath material only exposes banana plug mounting hole and installs banana plug when being convenient for current transformer secondary circuit short circuit, has greatly reduced the risk of short circuit work.
Wherein the conductive bar is provided with connecting through holes at equal intervals; the connecting piece penetrates through the connecting through hole and is fixedly arranged on the conducting bar.
The connecting piece comprises a connecting sheath, a fixing sheath, a transition piece and a fixing piece; wherein:
the fixing sheath is arranged on the outer surface of the fixing piece and used for fixing the fixing piece;
one end of the connecting sheath is fixedly arranged on the surface of the fixed sheath, and a connecting surface is formed on the fixed sheath;
the transition piece is arranged on the connecting surface;
the conductive extension socket is connected into the connecting sheath and fixedly connected with one surface of the transition piece;
the other surface of the transition piece is fixedly connected with the surface of the fixing piece;
one end of the banana plug is inserted into the fixing sheath and connected with the fixing piece.
The banana connector comprises a fixing piece, a banana plug and a banana connector, wherein the banana connector is arranged on the inner surface of the fixing piece, the banana connector is connected with the fixing piece through a screw thread, and the banana connector is connected with the fixing piece through a screw thread.
And the transition piece and the fixing piece are both conductive structures.
The connecting sheath and the fixing sheath are both of a polyvinyl chloride insulating structure.
Wherein, the outer surface of the conducting bar is provided with an insulating sheath.
In the scheme, the banana plug is made of a copper silver-plated material, the diameter of the banana plug is matched with a secondary loop current terminal produced by domestic and foreign mainstream manufacturers, the banana plug can be reliably inserted into the current terminal jack, and the contact resistance of the banana plug and the current terminal jack after insertion meets the requirements of relevant standards.
In the scheme, the adjustable current transformer secondary circuit short-circuit tool with the insulating handle has the advantages of good insulation, convenience in gripping, short circuit insertion and incapability of blocking sight, can be matched with short circuit use of secondary circuit current terminals produced by mainstream manufacturers at home and abroad, can complete short circuit work of a current transformer secondary circuit in operation by inserting a banana plug into a current terminal jack needing short circuit, can achieve the aim of conveniently and quickly short-connecting a secondary circuit current terminal at a fault point of a current transformer side without power failure when the defect of poor contact or open circuit of the current transformer secondary circuit is eliminated, improves the working efficiency and safety of eliminating the defect, ensures that workers quickly eliminate the defect, and improves the reliability of system operation and user power supply.
The top of the fixed sheath is provided with an expansion hole, and the banana plug inserting end is inserted into the fixed piece through the expansion hole, so that the short-circuit tool is expanded.
Among the above-mentioned scheme, the terminal distance of needs short circuit is bigger, and when an instrument can not satisfy the demand, through with the banana plug grafting of an instrument in the extension hole of another instrument, with mounting fixed connection, alright in order to realize the simple extension of instrument, convenient operation makes the instrument more possess the suitability.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
according to the adjustable current transformer secondary circuit short-circuit tool with the insulating handle, provided by the invention, a maintainer can install the banana plug on the connecting piece according to the condition of a terminal which needs to be short-connected actually, so that the short-circuit operation of different circuits can be well adapted, the problem of blockage during operation is avoided to a certain extent, and the operation of the maintainer is facilitated; in the realization process, the operating handle is handed to the maintainer, and the banana plug that will install is pegged graft and is gone into the terminal that needs the short circuit, because connecting piece, the inside connection structure of leading electrical drainage all are the conductor, and the outside is insulation system, when realizing the short circuit operation, has improved the security of maintenance operation.
Drawings
FIG. 1 is a schematic view of the construction of the tool of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1A;
FIG. 3 is a structural mounting diagram of the banana plug shorting adjacent terminals;
FIG. 4 is a view of the structural installation of the banana plug with short circuits spaced one terminal apart;
FIG. 5 is a structural mounting view of a banana plug shorted together with two terminals apart;
wherein: 1. an operating handle; 2. a conductive bar; 3. a connecting member; 31. connecting a sheath; 32. fixing the sheath; 321. an expanding hole; 33. a transition piece; 34. a fixing member; 4. a banana plug.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 and 2, an adjustable short-circuit tool for a secondary circuit of a current transformer with an insulating handle comprises an operating handle 1 and a conducting bar 2 fixedly connected with the operating handle 1; connecting pieces 3 are arranged on the conductive bar 2 at equal intervals; an adjustable banana plug 4 is arranged on the connecting piece 3.
In the specific implementation process, a maintainer installs the banana plug 4 on the connecting piece 3 according to the condition of a terminal which needs to be short-circuited actually, so that the banana plug can adapt to the short-circuit operation of different circuits well, the problem of blocking during operation is avoided to a certain extent, and the operation of the maintainer is facilitated; in the realization process, operating handle 1 is handed to the maintainer, and the banana plug 4 that will install is pegged graft into the terminal that needs the short circuit, because connecting piece 3, the inside connection structure of leading electrical drainage 2 all are the conductor, and the outside is insulation system, when realizing the short circuit operation, has improved the security of maintenance operation.
More specifically, the operating handle 1 is provided with an insulating sheath.
In the specific implementation process, the operating handle 1 is made of epoxy resin wrapped polyvinyl chloride insulating sheath materials, the length and the diameter of the handle can be customized, the requirement on human-machine efficacy is met, the anti-skidding threads are distributed at equal intervals, and the problem that a short-circuit tool is difficult to hold tightly is solved.
In the specific implementation process, the conducting bar 2 is arranged at the bottom end of the operating handle and made of copper silver-plated material; a polyvinyl chloride insulating sheath is coated outside, and the withstand voltage is more than 1 kV; the thickness of the conductive bar 2 can be customized according to the strength requirement of a use occasion, the width meets the installation requirement of the banana plug 4, and the length meets the requirement of four current terminals for short circuit simultaneously.
In the specific implementation process, operating handle 1, lead 2 rows of electrical bar and adopt integrated structural design, the whole injection moulding of outsourcing polyvinyl chloride insulating sheath material, only expose banana plug 4 mounting holes and install banana plug 4 when being convenient for current transformer secondary circuit short circuit, greatly reduced the risk of short circuit work.
More specifically, the insulating sheath is provided with anti-skidding threads.
More specifically, the conductive bar 2 is provided with connecting through holes at equal intervals; the connecting piece 3 penetrates through the connecting through hole and is fixedly arranged on the conductive bar 2.
More specifically, the connecting piece 3 comprises a connecting sheath 31, a fixing sheath 32, a transition piece 33 and a fixing piece 34; wherein:
the fixing sheath 32 is arranged on the outer surface of the fixing piece 34 and is used for fixing the fixing piece 34;
one end of the connecting sheath 31 is fixedly arranged on the surface of the fixed sheath 32, and a connecting surface is formed on the fixed sheath 32;
the transition piece 33 is arranged on the connecting surface;
the conducting bar 2 is inserted into the connecting sheath 31 and fixedly connected with one surface of the transition piece 33;
the other surface of the transition piece 33 is fixedly connected with the surface of the fixing piece 34;
one end of the banana plug 4 is inserted into the fixing sheath 32 and connected with the fixing piece 34.
More specifically, the inner surface of the fixing member 34 and the connection end of the banana plug 4 are provided with mutually matched thread structures, and the banana plug 4 is in threaded connection with the fixing member 34.
More specifically, the transition piece 33 and the fixing piece 34 are both conductive structures.
More specifically, the connecting sheath 31 and the fixing sheath 32 are both of a polyvinyl chloride insulating structure.
More specifically, the outer surface of the conductive bar 2 is provided with an insulating sheath.
In the specific implementation process, the banana plug 4 is made of a copper silver-plated material, the diameter of the banana plug 4 is matched with a secondary loop current terminal produced by domestic and foreign mainstream manufacturers, the banana plug can be reliably inserted into a current terminal jack, and the contact resistance between the banana plug 4 and the current terminal jack after insertion meets the relevant standard requirements.
In the specific implementation process, the adjustable current transformer secondary circuit short-circuit tool with the insulating handle has the advantages of good insulation, convenience in gripping, short circuit insertion and no sight blockage, can be matched with the short circuit use of secondary circuit current terminals produced by mainstream manufacturers at home and abroad, can complete the short circuit work of the current transformer secondary circuit in operation by inserting the banana plug 4 into a current terminal jack to be short-connected, can achieve the aim of conveniently and quickly short-connecting the secondary circuit current terminal at a fault point of the current transformer without power failure when the contact failure or open circuit defect of the current transformer secondary circuit is eliminated, improves the working efficiency and safety for eliminating the defect, ensures that the defect is quickly eliminated by a worker, and improves the reliability of system operation and user power supply.
Example 2
More specifically, on the basis of embodiment 1, an expansion hole 321 is arranged at the top of the fixing sheath 32, and the insertion end of the banana plug 4 is inserted into the fixing member 34 through the expansion hole 321, so as to realize the expansion of the shorting tool.
In the specific implementation process, when the terminal distance that needs the short circuit is bigger, and a instrument can not satisfy the demand, through pegging graft the banana plug 4 of a instrument in the extension hole 321 of another instrument, with mounting 34 fixed connection, alright in order to realize the simple extension of instrument, convenient operation makes the instrument more possess the suitability.
Example 3
When the secondary loop current terminal of the current transformer needing to be short-circuited is an adjacent terminal, the short circuit of the terminal of the adjacent current terminal in operation can be realized by installing any two banana plugs 4 to the adjacent banana plug 4 installing holes of the conducting bar 2, as shown in fig. 3.
When the current terminal of the secondary loop of the current transformer needs to be short-circuited at a distance of one terminal, the short circuit of the current terminal in operation can be realized by installing any two banana plugs 4 to the banana plug 4 installing holes with the distance of two adjacent holes of the conductive bar 2, as shown in fig. 4.
When the current terminal of the secondary loop of the current transformer needs to be short-circuited at a distance of two terminals, the short circuit of the current terminal in operation can be realized by installing any two banana plugs 4 to the banana plug 4 installing holes with the adjacent hole distance of three times of the conductive bar 2, as shown in fig. 5.
When the secondary circuit of the current transformer is only provided with one N terminal, the short circuit of the secondary circuit of the two-phase current transformer to the N terminal in operation can be realized by installing three banana plugs 4 to 4 installing holes of the banana plugs.
When the secondary circuit of the current transformer is only provided with one N terminal, the short circuit of the secondary circuit of the three-phase current transformer to the N terminal in operation can be realized by installing four banana plugs 4 to 4 installation holes of the banana plugs.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An adjustable short circuit tool for a secondary circuit of a current transformer with an insulating handle is characterized by comprising an operating handle (1) and a conductive bar (2) fixedly connected with the operating handle (1); connecting pieces (3) are arranged on the conductive bar (2) at equal intervals; an adjustable banana plug (4) is arranged on the connecting piece (3).
2. The adjustable current transformer secondary circuit short-circuit tool with the insulating handle is characterized in that an insulating sheath is arranged on the operating handle (1).
3. The adjustable current transformer secondary circuit short-circuit tool with the insulating handle as claimed in claim 2, wherein the insulating sheath is provided with anti-skid threads.
4. The adjustable short-circuit tool for the secondary circuit of the current transformer with the insulated handle as claimed in claim 1, wherein the conductive bar (2) is provided with connecting through holes at equal intervals; the connecting piece (3) penetrates through the connecting through hole and is fixedly arranged on the conductive bar (2).
5. The adjustable current transformer secondary circuit short-circuiting tool with the insulating handle according to claim 1, wherein said connecting member (3) comprises a connecting sheath (31), a fixing sheath (32), a transition member (33), and a fixing member (34); wherein:
the fixing sheath (32) is arranged on the outer surface of the fixing piece (34) and is used for fixing the fixing piece (34);
one end of the connecting sheath (31) is fixedly arranged on the surface of the fixed sheath (32), and a connecting surface is formed on the fixed sheath (32);
the transition piece (33) is arranged on the connecting surface;
the conducting bar (2) is inserted into the connecting sheath (31) and is fixedly connected with one surface of the transition piece (33);
the other surface of the transition piece (33) is fixedly connected with the surface of the fixing piece (34);
one end of the banana plug (4) is inserted into the fixing sheath (32) and is connected with the fixing piece (34).
6. The adjustable current transformer secondary circuit short-circuit tool with the insulated handle as claimed in claim 5, wherein the inner surface of the fixing member (34) and the connection end of the banana plug (4) are provided with mutually matched thread structures, and the banana plug (4) is in threaded connection with the fixing member (34).
7. The adjustable current transformer secondary circuit short-circuit tool with the insulating handle as claimed in claim 5, wherein the transition piece (33) and the fixing piece (34) are both conductive structures.
8. The adjustable current transformer secondary circuit short-circuit tool with the insulating handle as claimed in claim 5, wherein the connecting sheath (31) and the fixing sheath (32) are both made of polyvinyl chloride insulating structure.
9. The adjustable short-circuit tool for the secondary circuit of the current transformer with the insulated handle as claimed in any one of claims 1 to 8, wherein an insulating sheath is arranged on the outer surface of the conductive bar (2).
10. The adjustable short-circuit tool for the secondary circuit of the current transformer with the insulated handle as claimed in claim 9, wherein an expansion hole (321) is formed in the top of the fixed sheath (32), and the insertion end of the banana plug (4) is inserted into the fixed member (34) through the expansion hole (321), so that the expansion of the short-circuit tool is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011439730.3A CN112698074A (en) | 2020-12-10 | 2020-12-10 | Adjustable current transformer secondary circuit short-circuit tool with insulating handle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011439730.3A CN112698074A (en) | 2020-12-10 | 2020-12-10 | Adjustable current transformer secondary circuit short-circuit tool with insulating handle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112698074A true CN112698074A (en) | 2021-04-23 |
Family
ID=75507718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011439730.3A Pending CN112698074A (en) | 2020-12-10 | 2020-12-10 | Adjustable current transformer secondary circuit short-circuit tool with insulating handle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112698074A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644468A (en) * | 2021-08-11 | 2021-11-12 | 上海康恒环境股份有限公司 | URTK type terminal strip short connector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991096A (en) * | 2015-08-03 | 2015-10-21 | 国家电网公司 | Short circuit plug-in for test |
| CN208125764U (en) * | 2018-04-18 | 2018-11-20 | 贵州电网有限责任公司 | A kind of adjustable short connector of relay protection current loop |
| CN208833811U (en) * | 2018-09-21 | 2019-05-07 | 湖北华电江陵发电有限公司 | A kind of short connecting current terminal device |
| CN112051516A (en) * | 2020-08-03 | 2020-12-08 | 广东电网有限责任公司 | Current transformer secondary circuit short circuit instrument |
-
2020
- 2020-12-10 CN CN202011439730.3A patent/CN112698074A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991096A (en) * | 2015-08-03 | 2015-10-21 | 国家电网公司 | Short circuit plug-in for test |
| CN208125764U (en) * | 2018-04-18 | 2018-11-20 | 贵州电网有限责任公司 | A kind of adjustable short connector of relay protection current loop |
| CN208833811U (en) * | 2018-09-21 | 2019-05-07 | 湖北华电江陵发电有限公司 | A kind of short connecting current terminal device |
| CN112051516A (en) * | 2020-08-03 | 2020-12-08 | 广东电网有限责任公司 | Current transformer secondary circuit short circuit instrument |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644468A (en) * | 2021-08-11 | 2021-11-12 | 上海康恒环境股份有限公司 | URTK type terminal strip short connector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112698074A (en) | Adjustable current transformer secondary circuit short-circuit tool with insulating handle | |
| CN112051516A (en) | Current transformer secondary circuit short circuit instrument | |
| CN103441384B (en) | A kind of socket and there is the connector of this socket | |
| CN106054044B (en) | Insulation test device for gas-filled cabinet | |
| CN218848284U (en) | Wire connector for circuit breaker characteristic test | |
| CN112630474A (en) | Integral type area insulating handle's current transformer secondary circuit short circuit instrument | |
| CN204142947U (en) | Secondary terminals shorting stub is used in mutual inductor test | |
| CN110994432A (en) | Tee bend module | |
| CN114545051A (en) | Electric energy meter assembly | |
| CN215732623U (en) | Current transformer secondary circuit short circuit tool with current display | |
| CN209979691U (en) | Drawer type switch cabinet test dedicated short-circuit connection device | |
| CN209461764U (en) | Changeover plug is used in a kind of measurement | |
| CN108565606A (en) | A kind of short circuit connector switch | |
| CN108471035B (en) | Electrical connection short connecting sheet capable of repeatedly using pins | |
| CN111929477A (en) | Aviation plug's switching on-line measuring interface arrangement | |
| CN219811667U (en) | Insulated wire piercing grounding wire device | |
| KR101485148B1 (en) | Connector for transmitting incoming line of special high voltage substation facilities | |
| CN219065554U (en) | Terminal strip short-circuit plug | |
| CN213877756U (en) | End screen protection grounding less-oil inverted current transformer | |
| CN219040985U (en) | Three-phase contact plug-in short-circuit device of handcart circuit breaker | |
| CN217954614U (en) | Direct-insertion type electrification detection device | |
| CN116819297A (en) | Electric power test rod of circuit breaker | |
| CN112086763B (en) | Joint assembly | |
| CN103337761B (en) | For the short-circuit device of current terminal short circuit | |
| CN220584329U (en) | Frock for withstand voltage test and withstand voltage test system |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210423 |