CN112051516A - Current transformer secondary circuit short circuit instrument - Google Patents
Current transformer secondary circuit short circuit instrument Download PDFInfo
- Publication number
- CN112051516A CN112051516A CN202010768346.1A CN202010768346A CN112051516A CN 112051516 A CN112051516 A CN 112051516A CN 202010768346 A CN202010768346 A CN 202010768346A CN 112051516 A CN112051516 A CN 112051516A
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- Prior art keywords
- handle
- current transformer
- short
- circuit
- secondary circuit
- Prior art date
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- Pending
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- 241000234295 Musa Species 0.000 claims abstract description 38
- 235000018290 Musa x paradisiaca Nutrition 0.000 claims abstract description 38
- 230000007704 transition Effects 0.000 claims abstract description 29
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 8
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 206010014357 Electric shock Diseases 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a short circuit tool for a secondary circuit of a current transformer, which comprises a handle, an expansion sleeve, an expansion round hole, a banana plug, a transition piece, a telescopic lead and a sheath, wherein the extension sleeve is arranged on the handle; wherein: the expansion sleeve is arranged at the bottom end of the handle; the expansion round hole is formed in the top end of the expansion sleeve; the banana plug is arranged at the bottom end of the extension sleeve; the transition piece is embedded in the handle and is communicated with the side wall of the expansion sleeve; the telescopic lead is fixed at the bottom end of the handle and is welded and communicated with the transition piece; the sheath is arranged outside the handle, the transition piece and the telescopic lead. The insulating design and the anti-skidding design of the handle ensure the use safety; the ingenious design of the extension sleeve brings good expansibility; the banana plug is selected, so that the high efficiency of short circuit work is ensured; the telescopic lead can meet the requirements of short circuit work of current terminals at different distances and is more portable.
Description
Technical Field
The invention relates to the field of current transformer secondary circuit maintenance, in particular to a current transformer secondary circuit short-circuit tool.
Background
The current transformers in the transformer substation are numerous, and secondary currents of the current transformers need to be collected by devices such as relay protection, safety, measurement and metering. In operation, due to poor quality of components such as a current terminal and the like, poor installation process, oxidation corrosion of materials and the like, poor contact of a secondary circuit of the current transformer can be caused, even an open circuit defect is caused, so that a series of adverse consequences such as false operation rejection of a relay protection and self-installation device, inaccurate data acquisition of a measurement and metering device and the like are caused, and furthermore, an open circuit fault point of the secondary circuit of the current transformer can generate overvoltage, so that the safety of equipment and adjacent workers is endangered.
The defects of poor contact or open circuit and the like of a secondary circuit of a current transformer in operation are eliminated by two processing modes of power failure and power outage at present, but certain problems exist 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, so that a user urgently needs a short-circuit tool for a secondary circuit of a current transformer.
Disclosure of Invention
The invention provides a short-circuit tool for a secondary circuit of a current transformer, which aims to solve the safety problem of operators in short-circuit work and the sight problem during operation.
The primary objective of the present invention is to solve the above technical problems, and the technical solution of the present invention is as follows:
a short circuit tool for a secondary circuit of a current transformer comprises a tool body, wherein the tool body comprises a handle, an expansion sleeve, an expansion round hole, a banana plug, a transition piece, a telescopic lead and a sheath; wherein:
the expansion sleeve is arranged at the bottom end of the handle; the expansion round hole is formed in the top end of the expansion sleeve; the banana plug is arranged at the bottom end of the extension sleeve; the transition piece is embedded in the handle and is communicated with the side wall of the expansion sleeve; the telescopic lead is fixed at the bottom end of the handle and is welded and communicated with the transition piece; the sheath is arranged outside the handle, the transition piece and the telescopic lead.
In the scheme, the handle is convenient to hold tightly for use, and the insulating design is adopted, so that the safety of short circuit work is improved; the expansion sleeve can realize the combined use of a plurality of short-circuit tools; the expanding round hole is convenient for inserting banana plugs of other same short-circuit tools; the banana plug has good contact, which is beneficial to short circuit; the transition piece is used as a connecting medium of the banana plug and the telescopic lead; the telescopic lead can meet the short circuit work of a current terminal at a short distance or a long distance and is convenient to store and store in daily life; the sheath realizes the insulating function, protects operating personnel's personal safety.
Preferably, the handle is integrally injection moulded.
In the above scheme, not only make this short circuit instrument simple structure, convenient to use, make things convenient for operating personnel to carry moreover.
Preferably, the handle is provided with anti-skid threads distributed at equal intervals.
In the above scheme, the setting of anti-skidding screw thread makes the handle have anti-skidding function, has solved the difficult problem of holding tightly of short circuit instrument.
Preferably, the handle is an epoxy handle.
In the scheme, the cured epoxy resin is an excellent insulating material with high dielectric property, surface leakage resistance and electric arc resistance, and is used for manufacturing the handle, so that the electric shock risk is greatly reduced.
Preferably, the outer diameter of the expanded round hole is the same as the outer diameter of the banana plug.
In the scheme, the banana plugs of other same short-circuit tools can be conveniently inserted into the extension sleeve through the extension round holes, so that combined use is realized, and the extension short-circuit work of the secondary circuit of the two-phase or three-phase current transformer on the N terminal in operation is completed.
Preferably, the banana plug is a copper silver-plated banana plug.
In the scheme, the copper silver-plated banana plug is good in performance and strong in corrosion resistance.
Preferably, the transition piece is a transition copper piece.
In the above scheme, the transition copper piece has good electric conductivity and serves as a banana plug and a flexible lead intermediate medium.
Preferably, the telescopic conductor is twisted into a spiral shape by a plurality of strands of soft copper wires.
Among the above-mentioned scheme, wire after the transposition not only pliability and reliability improve greatly, have flexible characteristic moreover, can satisfy the short circuit work of far and near current terminal apart from to do benefit to accomodating and depositing of instrument.
Preferably, the sheath is a polyvinyl chloride insulating sheath.
Among the above-mentioned scheme, polyvinyl chloride has better electrical insulation performance and chemical stability for make insulating sheath, can prevent that handle, transition piece and flexible wire from exposing, greatly reduced the risk of short circuit work.
When the current transformer secondary circuit short circuit device works, an operator holds the two handles by hands, and inserts the banana plugs into current terminal jacks needing short circuit respectively, so that the short circuit work of the current transformer secondary circuit in operation can be completed; after the defect is eliminated, an operator holds the two handles and pulls out the banana plug at the bottom end of the banana plug, and then the normal operation of the secondary circuit of the current transformer can be recovered.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the insulating design and the anti-skidding design of the handle ensure the use safety; the ingenious design of the extension sleeve brings good expansibility; the banana plug is selected, so that the high efficiency of short circuit work is ensured; the telescopic lead can meet the requirements of short circuit work of current terminals at different distances and is more portable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a side view of the present invention;
FIG. 5 is an oblique view of the present invention;
FIG. 6 is a schematic view of the telescoping lead of the present invention;
wherein reference numerals in the figures denote: 1, a handle; 2, expanding the sleeve; 3 expanding the circular hole; 4, banana plug; 5 a transition piece; 6, telescoping a lead; 7 sheath.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
As shown in fig. 1 to 5, the short circuit tool for the secondary circuit of the current transformer comprises a tool body, wherein the tool body comprises a handle 1, an expansion sleeve 2, an expansion round hole 3, a banana plug 4, a transition piece 5, a telescopic lead 6 and a sheath 7; wherein: the expansion sleeve 2 is arranged at the bottom end of the handle 1; the expansion round hole 3 is arranged at the top end of the expansion sleeve 2; the banana plug 4 is arranged at the bottom end of the expansion sleeve 2; the transition piece 5 is embedded in the handle 1 and is communicated with the side wall of the expansion sleeve 2; the telescopic lead 6 is fixed at the bottom end of the handle 1 and is welded and communicated with the transition piece 5; the sheath 7 is disposed outside the handle 1, the transition piece 5 and the telescopic wire 6.
In the scheme, the handle 1 is convenient to hold tightly for use, and the insulating design is adopted, so that the safety of short circuit work is improved; the expansion sleeve 2 can realize the combined use of a plurality of short-circuit tools; the expanding round hole 3 is convenient for inserting banana plugs 4 of other same short-circuit tools; the banana plug 4 is good in contact and beneficial to short circuit; the transition piece 5 is used as a connecting medium of the banana plug 4 and the telescopic lead 6; the telescopic lead 6 can meet the short circuit work of a current terminal at a short distance or a long distance and is convenient to store and store in daily life; the sheath 7 realizes the insulating function, protects the personal safety of operating personnel.
In particular, the handle 1 is integrally injection molded.
In the above scheme, not only make this short circuit instrument simple structure, convenient to use, make things convenient for operating personnel to carry moreover.
Specifically, the handle 1 is provided with anti-skid threads distributed at equal intervals.
In the above scheme, the setting of anti-skidding screw thread makes handle 1 have anti-skidding function, has solved the difficult problem that the short circuit instrument is difficult for holding tightly.
Specifically, the handle 1 is an epoxy resin handle.
In the scheme, the cured epoxy resin is an excellent insulating material with high dielectric property, surface leakage resistance and electric arc resistance, and is used for manufacturing the handle 1, so that the electric shock risk is greatly reduced.
Specifically, the outer diameter of the expanded round hole 3 is the same as the outer diameter of the banana plug 4.
In the above scheme, the expanding round hole 3 is convenient for the banana plug 4 of other same short circuit tools to insert into the expanding sleeve 2, so that the combined use is realized, and the expanding short circuit work of the secondary circuit of the two-phase or three-phase current transformer on the N terminal in the operation is completed.
Specifically, the banana plug 4 is a copper silver-plated banana plug.
In the scheme, the copper silver-plated banana plug is good in performance and strong in corrosion resistance.
In particular, the transition piece 5 is a transition copper piece.
In the above scheme, the transition copper part has good conductivity and serves as an intermediate medium between the banana plug 4 and the telescopic lead 6.
As shown in fig. 6, specifically, the telescopic conductor 6 is twisted into a spiral shape by several strands of soft copper wires.
Among the above-mentioned scheme, wire after the transposition not only pliability and reliability improve greatly, have flexible characteristic moreover, can satisfy the short circuit work of far and near current terminal apart from to do benefit to accomodating and depositing of instrument.
Specifically, the sheath 7 is a polyvinyl chloride insulating sheath.
Among the above-mentioned scheme, polyvinyl chloride has better electric insulating property and chemical stability for make insulating sheath, can prevent that handle 1, transition piece 5 and flexible wire 6 from exposing, greatly reduced the risk of short circuit work.
When the current transformer secondary circuit short-circuit device works, an operator can hold the two handles 1 by hands, and insert the banana plugs 4 into current terminal jacks needing short-circuit respectively, so that the short-circuit work of the current transformer secondary circuit in operation can be completed; after the defect is eliminated, an operator holds the two handles 1 and pulls out the banana plug 4 at the bottom end of the banana plug, and then the normal operation of the secondary circuit of the current transformer can be recovered.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
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 (9)
1. A short circuit tool for a secondary circuit of a current transformer is characterized by comprising a handle (1), an extension sleeve (2), an extension round hole (3), a banana plug (4), a transition piece (5), a telescopic lead (6) and a sheath (7); wherein:
the expansion sleeve (2) is arranged at the bottom end of the handle (1);
the expansion round hole (3) is arranged at the top end of the expansion sleeve (2);
the banana plug (4) is arranged at the bottom end of the extension sleeve (2);
the transition piece (5) is embedded in the handle (1) and is communicated with the side wall of the expansion sleeve (2);
the telescopic lead (6) is fixed at the bottom end of the handle (1) and is welded and communicated with the transition piece (5);
the sheath is arranged outside the handle (1), the transition piece (5) and the telescopic lead (6).
2. The short-circuiting tool for the secondary circuit of a current transformer according to claim 1, wherein said handle (1) is integrally injection-molded.
3. The current transformer secondary circuit short-circuit tool is characterized in that the handle (1) is provided with anti-skid threads distributed at equal intervals.
4. The current transformer secondary circuit shorting tool according to claim 1, wherein the handle (1) is an epoxy resin handle.
5. The short-circuiting tool for the secondary circuit of a current transformer according to claim 1, wherein the outside diameter of said expanding circular hole (3) is the same as the outside diameter of the banana plug (4).
6. The short-circuit tool for the secondary circuit of the current transformer is characterized in that the banana plug (4) is a copper silver-plated banana plug.
7. The short-circuit tool for the secondary circuit of the current transformer as claimed in claim 1, wherein the transition piece (5) is a transition copper piece.
8. The short-circuit tool for the secondary circuit of the current transformer as claimed in claim 1, wherein the telescopic conductor (6) is twisted into a spiral shape by a plurality of strands of soft copper wires.
9. The short-circuiting tool for the secondary circuit of current transformer according to claim 1, wherein said sheath (7) is a polyvinyl chloride insulating sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010768346.1A CN112051516A (en) | 2020-08-03 | 2020-08-03 | Current transformer secondary circuit short circuit instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010768346.1A CN112051516A (en) | 2020-08-03 | 2020-08-03 | Current transformer secondary circuit short circuit instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112051516A true CN112051516A (en) | 2020-12-08 |
Family
ID=73602214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010768346.1A Pending CN112051516A (en) | 2020-08-03 | 2020-08-03 | Current transformer secondary circuit short circuit instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112051516A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630474A (en) * | 2020-12-10 | 2021-04-09 | 广东电网有限责任公司中山供电局 | Integral type area insulating handle's current transformer secondary circuit short circuit instrument |
| CN112698074A (en) * | 2020-12-10 | 2021-04-23 | 广东电网有限责任公司中山供电局 | Adjustable current transformer secondary circuit short-circuit tool with insulating handle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60189210A (en) * | 1984-03-08 | 1985-09-26 | Toshiba Corp | Current transformer |
| CN201075416Y (en) * | 2007-07-12 | 2008-06-18 | 上海三意楼宇实业有限公司 | Short inserting structure for electronic line board |
| CN203367704U (en) * | 2013-06-18 | 2013-12-25 | 国家电网公司 | Current short-circuit wiring device for terminal strip in relay protection screen |
| CN203491485U (en) * | 2013-08-30 | 2014-03-19 | 国家电网公司 | Secondary circuit wiring terminal strip short-circuiting plug for power plant or transformer station |
| CN104007357A (en) * | 2014-05-22 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Current transformer secondary loop short-circuit device |
| CN105004890A (en) * | 2015-06-29 | 2015-10-28 | 国网山东省电力公司淄博供电公司 | Fault detection device operating low-voltage current transformer |
| CN204732645U (en) * | 2015-06-18 | 2015-10-28 | 国网山东夏津县供电公司 | Secondary loop of mutual inductor short-circuit plug |
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| CN208570997U (en) * | 2017-10-23 | 2019-03-01 | 深圳供电局有限公司 | A kind of four end electric current secondary loop shorting stubs |
| CN208767581U (en) * | 2018-11-12 | 2019-04-19 | 中国大唐集团科学技术研究院有限公司华中分公司 | A kind of portable short-circuit device |
| 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 |
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2020
- 2020-08-03 CN CN202010768346.1A patent/CN112051516A/en active Pending
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| JPS60189210A (en) * | 1984-03-08 | 1985-09-26 | Toshiba Corp | Current transformer |
| CN201075416Y (en) * | 2007-07-12 | 2008-06-18 | 上海三意楼宇实业有限公司 | Short inserting structure for electronic line board |
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| CN208767581U (en) * | 2018-11-12 | 2019-04-19 | 中国大唐集团科学技术研究院有限公司华中分公司 | A kind of portable short-circuit device |
| CN210401466U (en) * | 2019-06-12 | 2020-04-24 | 国网山东省电力公司嘉祥县供电公司 | Secondary loop current short circuit device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630474A (en) * | 2020-12-10 | 2021-04-09 | 广东电网有限责任公司中山供电局 | Integral type area insulating handle's current transformer secondary circuit short circuit instrument |
| CN112698074A (en) * | 2020-12-10 | 2021-04-23 | 广东电网有限责任公司中山供电局 | Adjustable current transformer secondary circuit short-circuit tool with insulating handle |
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Application publication date: 20201208 |