CN112213524A - Experimental termination of multi-functional transformer of 110kV and above transformer suspension type - Google Patents
Experimental termination of multi-functional transformer of 110kV and above transformer suspension type Download PDFInfo
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- CN112213524A CN112213524A CN202010747261.5A CN202010747261A CN112213524A CN 112213524 A CN112213524 A CN 112213524A CN 202010747261 A CN202010747261 A CN 202010747261A CN 112213524 A CN112213524 A CN 112213524A
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- 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
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Abstract
The invention relates to a wiring device for testing a suspended multifunctional transformer of a transformer with the voltage of 110kV or more, which comprises a testing part connected with a high-voltage side sleeve of the transformer and an insulating rod with the height adjustable, wherein the insulating rod is connected with the testing part, the height adjustable insulating rod is connected with the testing part, the testing part comprises a current conducting plate with a right opening of Contraband type and a voltage conducting plate with a left opening of Contraband type, the upper end of the voltage conducting plate is embedded into the current conducting plate, the upper end of the voltage conducting plate embedded into the current conducting plate is wrapped by an insulating layer, the upper end of the current conducting plate is provided with an insulated fixed end fixedly connected with the voltage conducting plate and a current terminal capable of being connected with the circuit, the side surface of the voltage conducting plate is provided with a voltage terminal capable. The invention solves the problem that a tester needs to climb back and forth when testing the electrical performance of the transformer, and avoids the accident potential of falling from high altitude.
Description
Technical Field
The invention relates to the field of electrical preventive tests of transformers, in particular to a wiring device for a suspension type multifunctional transformer test of a transformer with the voltage of 110kV or more.
Background
At present, the electrical performance test items of the transformer with the voltage class of 110kV and above include direct current resistance, insulation resistance, dielectric loss test and the like, and the test is usually performed by clamping a lead clamp of a test instrument on a high-voltage side sleeve of the transformer, as shown in fig. 1, but the clamping mode has the following problems: 1. the contact area between the test clamp and the high-voltage side sleeve of the transformer is small, so that the problems of large test current and easy heating of the test clamp can be caused, and the test data is inaccurate; 2. the test clamp is easy to fall off due to improper manual operation of the test clamp, and the force points are repeatedly searched by testers, so that the labor intensity of the testers is increased, and the working efficiency is reduced; 3. the voltage test clamp and the current test clamp are easy to slide when contacting with a smooth transformer bushing, and if the positions of the voltage test clamp and the current test clamp are close, inaccurate test data and large deviation can be caused. To a problem of (a). In addition, because transformer high-voltage side sleeve pipe highly reaches more than 3 meters, the tester need take the bucket arm car or climb to the transformer high-voltage side with the help of the cat ladder and correspond the position wiring during the experiment on transformer body, and the climbing sleeve pipe makes the tester have the accident hidden danger that the high altitude falls, and the climbing that makes a round trip consumes a large amount of physical powers of tester, has increased the experimental degree of difficulty and test time. Therefore, the development of a device which completely relieves the experimenter from the work of wiring on the high-voltage side bushing of the transformer by means of auxiliary tools such as a crane or a ladder stand is a problem which needs to be solved by the experimenter in the field at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the wiring device for the test of the suspended multifunctional transformer of the transformer with the voltage of 110kV or more, which solves the problem that testing personnel need to climb back and forth when the electrical performance of the transformer is tested, and avoids the accident potential of falling from high altitude.
The technical purpose of the invention is realized by the following technical scheme:
a wiring device for testing a suspension type multifunctional transformer of a transformer with 110kV and above comprises a testing part connected with a high-voltage side sleeve of the transformer and an insulating rod connected with the testing part and capable of adjusting height, wherein the testing part comprises a current conducting plate with a right opening of Contraband type and a left opening of Contraband type, the upper end of the current conducting plate is embedded into a voltage conducting plate in the current conducting plate, the upper end of the voltage conducting plate embedded into the current conducting plate is completely wrapped by an insulating layer, the upper end of the current conducting plate is provided with an insulated fixed end fixedly connected with the voltage conducting plate and a current terminal capable of being connected with a test current wire, the side surface of the voltage conducting plate is provided with a voltage terminal capable of being connected with a test voltage wire, the top end of the insulating rod is provided with a conductive pressing part which is screwed into the voltage conducting plate and clamps the high-voltage side sleeve of the transformer, the transformer high-voltage side sleeve is clamped, the contact surfaces of the current conducting plate and the voltage conducting plate and the transformer high-voltage side sleeve are increased, and meanwhile, the insulating layer is arranged between the current conducting plate and the voltage conducting plate, so that the current conducting plate and the voltage conducting plate are effectively insulated and isolated, the test current line and the test voltage line are ensured not to be on the same horizontal plane, and the accuracy of test data is ensured.
In one embodiment, the current conducting plate is a current copper plate, and the voltage conducting plate is a voltage copper plate.
In one embodiment, the compression part comprises a conductive screw rod connected with the insulating rod and screwed into the voltage copper plate and a copper cap positioned at the top of the screw rod and close to the lower end of the current copper plate, the screw rod is screwed into the voltage copper plate by rotating the insulating rod, and the copper cap is close to the lower end of the current copper plate to clamp the high-voltage side sleeve of the transformer.
In one embodiment, a positioning bolt hole is formed in the side face of the copper cap, and a positioning bolt matched with the positioning bolt hole locks the copper cap at the top end of the screw rod to prevent the copper cap from falling off in the use process.
In one embodiment, the insulating rod is formed by connecting a plurality of insulating rod units, and the insulating rod units which can be connected according to the height of the high-voltage side sleeve of the transformer form the insulating rod.
In one embodiment, the lower end of the voltage copper plate is provided with a connectable auxiliary rod adjacent to the insulating rod, so that the clamping of the transformer high-voltage side bushing is controlled conveniently.
In one embodiment, the insulating rod unit is a hollow round rod made of epoxy resin, the length of the hollow round rod is 1.5m, the thickness of a tube wall is 2.5mm, and the diameter of the hollow round rod is phi 40.
In one embodiment, the transverse length of the voltage copper plate is 80mm, the longitudinal length of the voltage copper plate is 100mm, the thickness of the voltage copper plate is 5mm, and the width of the voltage copper plate is 40 mm.
In one embodiment, the transverse length of the current copper plate is 80mm, and the longitudinal length of the current copper plate is 10 mm.
In one embodiment, the thickness of the current copper plate is 5mm, and the width of the copper plate is 40 mm.
The invention has the following beneficial effects:
the testing device is provided with the current conducting plate and the voltage conducting plate which are mutually embedded, so that the contact surface between the testing device and a high-voltage side sleeve of the transformer is increased, the heating and even burning of a lead caused by poor contact and overlarge current are avoided, the insulating layer is arranged between the current conducting plate and the voltage conducting plate, the current conducting plate and the voltage conducting plate are effectively insulated and isolated, the testing current wire and the testing voltage wire are not on the same horizontal plane, and the accuracy of testing data is ensured;
secondly, the transformer high-voltage side bushing is simple in structure, easy to install and convenient to carry, and a proper insulating rod can be selected according to the height of the transformer high-voltage side bushing;
thirdly, the tester can use the invention on the ground or a transformer platform, so that the operation of the tester by means of an overhead working truck and a herringbone ladder is reduced, the labor intensity and the safety risk of the tester are reduced, the testing time is shortened, and the overhauling efficiency is improved;
and fourthly, the use of the overhead working truck can be reduced by testers, and the maintenance cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a test clamp clamping a high-voltage side bushing of a transformer;
FIG. 2 is a schematic of the present invention;
FIG. 3 is an enlarged schematic view at A of FIG. 2;
FIG. 4 is a schematic view of the back of FIG. 3;
FIG. 5 is a side schematic view of FIG. 3;
FIG. 6 is a schematic view of the insulating rod and the pressing part of the present invention;
fig. 7 is a schematic diagram of a large transformer test wiring applying the invention.
In the figure: 1-transformer high-voltage side bushing, 2-test clamp, 21-test voltage wire, 22-test current wire, 3-current copper plate, 31-current terminal, 32-fixed end, 4-voltage copper plate, 41-voltage terminal, 42-insulating layer, 5-insulating rod, 51-screw rod, 52-copper cap and 521-positioning bolt.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
It should be noted that all the directional terms such as "upper" and "lower" referred to herein are used with respect to the view of the drawings, and are only for convenience of description, and should not be construed as limiting the technical solution.
As shown in fig. 1, in a conventional transformer electrical performance test, a test clamp 2 is generally clamped on a transformer high-voltage side sleeve 1, a test voltage wire 21 and a test current wire 22 are respectively and electrically connected with corresponding test instruments, but the connection mode has many defects, and a tester needs to take a bucket arm vehicle or climb to a corresponding position of the transformer high-voltage side on a transformer body for wiring, so that the climbing sleeve causes the tester to have accident potential of high-altitude falling, the climbing is performed back and forth, a large amount of physical strength of the tester is consumed, and the test difficulty and the test time are increased.
As shown in fig. 2-7, a wiring device for testing a suspended multifunctional transformer of 110kV and above, comprising a testing part connected with a high-voltage side sleeve 1 of the transformer and an insulating rod 5 with adjustable height connected with the testing part, wherein the insulating rod 5 is formed by connecting a plurality of insulating rod units, the insulating rod 5 is formed by connecting the insulating rod units which can be connected according to the height of the high-voltage side sleeve 1 of the transformer, the testing part comprises a current copper plate 3 with a right opening 'Contraband' and a voltage copper plate 4 with a left opening 'Contraband' and the upper end of which is embedded in the current copper plate 3, the upper end of the voltage copper plate 4 embedded in the current copper plate 3 is completely wrapped by an insulating layer 42, the upper end of the current copper plate 3 is provided with an insulated fixing end 32 fixedly connected with the voltage copper plate 4 and a current terminal 31 which can be connected with a test current wire 22, the side of the voltage copper plate 4 is provided, the top end of the insulating rod 5 is provided with a conductive screw 51 screwed into the voltage copper plate 4 and a copper cap 52 positioned at the top of the screw 51 and close to the lower end of the current copper plate 3, the screw 51 is screwed into the voltage copper plate 4 by rotating the insulating rod 5, and the copper cap 52 is close to the lower end of the current copper plate 3 to clamp the high-voltage side sleeve 1 of the transformer.
Preferably, the side of the copper cap 52 is provided with a positioning pin hole, and the positioning pin 521 matched with the positioning pin hole locks the copper cap 52 at the top end of the screw 51, so as to prevent the copper cap 52 from falling off in the using process.
In this embodiment, the insulating rod unit is a hollow round rod made of epoxy resin, the length is 1.5m, the thickness of the tube wall is 2.5mm, and the diameter is phi 40.
In the present embodiment, the voltage copper plate 4 has a lateral length of 80mm and a longitudinal length of 100mm, and the voltage copper plate 4 has a copper plate thickness of 5mm and a copper plate width of 40 mm.
In the present embodiment, the transverse length of the current copper plate 3 is 80mm, the longitudinal length thereof is 10mm, the thickness of the current copper plate 3 is 5mm, and the width thereof is 40 mm.
Preferably, the lower end of the voltage copper plate 4 is provided with a connectable auxiliary rod (not shown in the drawings) adjacent to the insulating rod 5, so as to facilitate the clamping of the invention on the high-voltage side bushing 1 of the transformer.
The implementation principle of the invention is as follows:
during the test, a tester connects the voltage wire and the current wire to the voltage terminal 41 on the side of the voltage copper plate 4 and the current terminal 31 on the upper end of the current copper plate 3 respectively, the length of the hollow insulating rod 5 is adjusted to the position of the transformer high-voltage side sleeve 1, the hollow insulating rod 5 is rotated to drive the screw rod 51 to move up and down in the voltage copper plate 4, so that the lower ends of the copper cap 52 and the current copper plate 3 move to firmly clamp the transformer high-voltage side sleeve 1, the voltage terminal 41 and the current terminal 31 are respectively connected with the voltage terminal and the current terminal 31 of the test instrument, the tester can be thoroughly released from the work of carrying out the wiring on the transformer high-voltage side sleeve 1 by auxiliary tools such as a crane or a ladder stand, the contact surfaces of the current copper plate 3 and the voltage copper plate 4 and the transformer high-voltage side sleeve 1 are increased, and the insulating layer 42 is arranged between the current copper, the two are effectively insulated and isolated, the current line and the voltage line are not on the same horizontal plane, and the accuracy of test data is ensured.
The invention also has the function of the insulation resistance test short-circuit wire, when the insulation resistance test is to be carried out, the current and voltage wires are untied, the three-phase (A, B, C) connection is carried out by other wires through the voltage terminal 41, the hollow insulating rod 5 is rotated to drive the screw rod 51 to move up and down in the voltage copper plate 4, so that the lower ends of the copper cap 52 and the current copper plate 3 move to firmly clamp the high-voltage side sleeve 1 of the transformer, and a tester does not need to carry out the insulation resistance test by auxiliary tools such as a crane or a ladder stand.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A wiring device for testing a suspension type multifunctional transformer of a transformer with the voltage of 110kV or more, it is characterized by comprising a testing part connected with a high-voltage side sleeve (1) of the transformer and an insulating rod (5) which is connected with the testing part and can adjust the height, the testing part comprises a current conducting plate with a right opening of 'Contraband' type and a voltage conducting plate with a left opening of 'Contraband' type, the upper end of the voltage conducting plate embedded in the current conducting plate is completely wrapped by an insulating layer (42), the upper end of the current conducting plate is provided with an insulating fixed end (32) fixedly connected with the voltage conducting plate and a current terminal (31) capable of being connected with a test current wire (22), the side of the voltage conducting plate is provided with a voltage terminal (41) which can be connected with a test voltage wire (21), the top end of the insulating rod (5) is provided with a conductive pressing part which is screwed into the voltage conductive plate and clamps the transformer high-voltage side sleeve (1) with the current conductive plate.
2. The test wiring device for 110kV and above transformer-suspended multifunctional transformers, according to claim 1, wherein the current conducting plate is a current copper plate (3) and the voltage conducting plate is a voltage copper plate (4).
3. The test wiring device for the 110kV and above transformer-suspended multifunctional transformer according to claim 2, wherein the compression part comprises a conductive screw (51) connected with the insulating rod (5) and screwed into the voltage copper plate (4) and a copper cap (52) positioned on the top of the screw (51) and close to the lower end of the current copper plate (3).
4. The test wiring device for the suspended multifunctional transformer of 110kV and above transformers as claimed in claim 3, wherein a positioning pin hole is formed in the side surface of the copper cap (52), and a positioning pin (521) matched with the positioning pin hole locks the copper cap (52) at the top end of the screw rod (51).
5. 110kV and above transformer-suspended multifunctional transformer test wiring device according to any one of claims 1-4, wherein the insulation rod (5) is formed by connecting a plurality of insulation rod units.
6. The test wiring device for the 110kV and above transformer-suspended multifunctional transformer as claimed in claim 5, wherein the lower end of the voltage copper plate (4) is provided with a connectable auxiliary rod adjacent to the insulating rod (5).
7. The test wiring device for the suspended multifunctional transformer of 110kV and above transformers according to claim 5, wherein the insulation rod units are hollow round rods made of epoxy resin, the length of each hollow round rod is 1.5m, the thickness of a tube wall is 2.5mm, and the diameter of each hollow round rod is phi 40.
8. The test wiring device for the 110kV and above transformer-suspended multifunctional transformer according to claim 2, wherein the transverse length of the voltage copper plate (4) is 80mm, the longitudinal length of the voltage copper plate is 100mm, the thickness of the voltage copper plate (4) is 5mm, and the width of the voltage copper plate is 40 mm.
9. The test wiring device for 110kV and above transformer-suspended multifunctional transformers according to claim 8, wherein the copper current plate (3) has a transverse length of 80mm and a longitudinal length of 10 mm.
10. The test wiring device for 110kV and above transformer-suspended multifunctional transformers according to claim 9, wherein the thickness of the copper plate of the current copper plate (3) is 5mm, and the width of the copper plate is 40 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747261.5A CN112213524A (en) | 2020-07-29 | 2020-07-29 | Experimental termination of multi-functional transformer of 110kV and above transformer suspension type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010747261.5A CN112213524A (en) | 2020-07-29 | 2020-07-29 | Experimental termination of multi-functional transformer of 110kV and above transformer suspension type |
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| Publication Number | Publication Date |
|---|---|
| CN112213524A true CN112213524A (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010747261.5A Pending CN112213524A (en) | 2020-07-29 | 2020-07-29 | Experimental termination of multi-functional transformer of 110kV and above transformer suspension type |
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| CN (1) | CN112213524A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137256A (en) * | 2021-11-11 | 2022-03-04 | 国网辽宁省电力有限公司本溪供电公司 | Multifunctional wiring conversion device for high-voltage test of power transformation equipment and operation method thereof |
| CN117790141A (en) * | 2024-02-26 | 2024-03-29 | 扬州市银建电气有限公司 | Multifunctional voltage test transformer and control method thereof |
-
2020
- 2020-07-29 CN CN202010747261.5A patent/CN112213524A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114137256A (en) * | 2021-11-11 | 2022-03-04 | 国网辽宁省电力有限公司本溪供电公司 | Multifunctional wiring conversion device for high-voltage test of power transformation equipment and operation method thereof |
| CN117790141A (en) * | 2024-02-26 | 2024-03-29 | 扬州市银建电气有限公司 | Multifunctional voltage test transformer and control method thereof |
| CN117790141B (en) * | 2024-02-26 | 2024-05-03 | 扬州市银建电气有限公司 | Multifunctional transformer voltage test device and control method thereof |
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