CN109030885B - Transformer high voltage pile test electrode and transformer - Google Patents
Transformer high voltage pile test electrode and transformer Download PDFInfo
- Publication number
- CN109030885B CN109030885B CN201810841455.4A CN201810841455A CN109030885B CN 109030885 B CN109030885 B CN 109030885B CN 201810841455 A CN201810841455 A CN 201810841455A CN 109030885 B CN109030885 B CN 109030885B
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- pile head
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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
- G01R1/06—Measuring leads; Measuring probes
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- 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
- G01R31/62—Testing of transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention provides a high-voltage pile head testing electrode of a transformer and the transformer, which relate to the field of power accessories and comprise the following components: the test device comprises a test rod and an insulating sheath, wherein one end of the test rod is connected with a high-voltage pile head line board, the other end of the test rod is a free end, the free end is used for being connected with an electrical test instrument, and insulating layers are arranged outside the high-voltage pile head line board and outside the joint of the test rod and the high-voltage pile head line board; an insulating sheath is sleeved outside the free end of the test rod. The insulating layer is arranged outside the high-voltage pile head line board and outside the junction of the test rod and the high-voltage pile head line board, only the free end of the test rod is exposed, and only the free end is exposed by taking down the insulating tape wound outside the high-voltage pile head line board during testing, and the insulating sheath is not required to be arranged outside the high-voltage pile head line board after testing, and only the insulating sheath is required to be sleeved on the free end, so that the labor capacity of workers can be reduced, the working efficiency of the workers can be improved, and the operation risk can be reduced.
Description
Technical Field
The invention relates to the field of power accessories, in particular to a high-voltage pile head testing electrode of a transformer and the transformer.
Background
Eighteen anti-accident measures of the national grid company provide that: the outgoing line pile heads of the transformer 35kv and below are required to be fully sealed and insulated by insulating adhesive tapes so as to realize insulation treatment on the pile heads, thereby preventing short circuit faults in the near area of the transformer.
However, the transformer needs to be subjected to electrical test such as direct current resistance test and insulation resistance test at regular intervals, insulation coating on the pile head needs to be removed when the transformer is subjected to electrical test, and a test clamp of an electrical test instrument clamps a high-voltage pile head line board to carry out electrical test; after the test is finished, the fire working procedure is required to be handled, the high-voltage pile head is subjected to full-sealing insulating coating, namely, the high-voltage pile head is wound round by adopting an insulating adhesive tape so as to be isolated from the outside, and the fire is required to be processed when the high-voltage pile head is subjected to full-sealing insulating coating. The transformer is subjected to regular electrical test by technicians, so that the transformer has large workload and low working efficiency, and certain safety risks can be generated in the fire-starting treatment.
Disclosure of Invention
The invention aims to provide a high-voltage pile head testing electrode of a transformer and the transformer, which are used for solving the problems of large workload, low working efficiency and large operation risk when working personnel perform regular electrical test on the transformer in the prior art.
The invention provides a high-voltage pile head test electrode of a transformer, which comprises the following components: the test device comprises a test rod and an insulating sheath, wherein one end of the test rod is connected with a high-voltage pile head line board, the other end of the test rod is a free end, the free end is used for being connected with an electrical test instrument, and insulating layers are arranged outside the high-voltage pile head line board and outside the joint of the test rod and the high-voltage pile head line board;
the free end of the test rod is sleeved with the insulating sheath.
The test rod is provided with external threads at one end far away from the free end, a screw hole is formed in the high-voltage pile head line board, and the test rod penetrates through the screw hole to be in threaded connection with the high-voltage pile head line board;
the port of the insulating sheath is provided with internal threads matched with the external threads.
Specifically, the high-voltage pile head testing electrode of the transformer further comprises a first fixing piece, and a screw hole is formed in the first fixing piece;
The high-voltage pile head line board is connected with a drainage board, the drainage board is provided with a mounting hole, the test rod sequentially penetrates through the screw hole of the high-voltage pile head line board and the mounting hole, and is in threaded connection with the first fixing piece, so that the high-voltage pile head line board is tightly attached to the drainage board.
Further, the high-voltage pile head testing electrode of the transformer further comprises an insulating tube, the insulating tube is sleeved outside the testing rod, and one end of the insulating tube is in threaded connection with the testing rod and is abutted to the first fixing piece;
The insulating tube is gone up and is kept away from the one end of first mounting is equipped with the external screw thread, insulating sheath be provided with the external screw thread assorted internal screw thread of insulating tube.
Specifically, the one end that the test rod is kept away from the free end is provided with the second mounting, the second mounting with the test rod is connected.
Further, one side, close to the transformer high-voltage pile head line board, of the first fixing piece and the second fixing piece is provided with a conducting layer respectively.
Further, the conductive layer is conductive paste arranged on the first fixing piece and the second fixing piece.
Compared with the prior art, the high-voltage pile head testing electrode for the transformer has the following advantages:
When a technician regularly performs electrical test such as direct current resistance test and insulation resistance test on the transformer, the insulation sheath is taken down from the test rod, and the test clamp of the electrical test instrument is clamped at the free end of the test rod.
Insulating layers are arranged outside the high-voltage pile head line board and outside the connection part of the test rod and the high-voltage pile head line board, namely, insulating tapes are wound, only the free end of the test rod is exposed, and after the electric test is finished, an insulating sheath is sleeved outside the free end, so that the fully-sealed insulating coating of the pile head is realized; when the electric test instrument is used for testing the transformer, the insulating sheath is directly taken down to expose the free end, and the electric test instrument is connected with the free end of the test rod so as to realize the test of the transformer. Because the insulating adhesive tape wound outside the high-voltage pile head line board is not required to be taken down during testing, only the insulating sheath is required to be taken down, and the live fire insulation treatment is not required to be carried out outside the high-voltage pile head line board after testing, and only the insulating sheath is required to be sleeved on the free end, the labor capacity of workers can be reduced, the working efficiency of the workers is improved, and the operation risk is reduced.
The invention also provides a transformer, which comprises a transformer body, a transformer high-voltage sleeve, a transformer high-voltage pile head line board and the transformer high-voltage pile head test electrode, wherein one end of the transformer high-voltage sleeve is connected with the transformer body, the other end of the transformer high-voltage sleeve is connected with the transformer high-voltage pile head line board, and one end of the test rod, which is far away from the free end, is connected with the transformer high-voltage pile head line board.
The advantages of the transformer and the transformer high-voltage pile head test electrode are the same as those of the transformer high-voltage pile head test electrode in the prior art, and the transformer high-voltage pile head test electrode is not described in detail herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a testing electrode for a high-voltage pile head of a transformer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of connection between a test rod and a first fixing member in a testing electrode of a high-voltage pile head of a transformer according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of an insulating tube in a testing electrode of a high-voltage pile head of a transformer according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of an insulating sheath in a high-voltage pile head test electrode of a transformer according to an embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a transformer according to an embodiment of the present invention.
Reference numerals:
1-a test rod; 11-a second fixing member; 12-free end; 2-a first fixing member; 3-insulating tube; 4-an insulating sheath; 5-high-voltage pile head line board; 51-an insulating layer; 6-drainage plates; 7-a high-voltage bushing of the transformer; 8-transformer body.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
In the description of the present invention, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like are used, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a testing electrode for a high-voltage pile head of a transformer according to an embodiment of the present invention; fig. 5 is a schematic structural diagram of a transformer according to an embodiment of the present invention.
As shown in fig. 1 and 5, the high-voltage pile head testing electrode for a transformer provided in this embodiment includes: the test rod 1 and the insulating sheath 4, one end of the test rod 1 is connected with the high-voltage pile head line board 5, the other end is a free end 12, the free end 12 is used for being connected with an electrical test instrument, and insulating layers 51 are arranged outside the high-voltage pile head line board 5 and outside the joint of the test rod 1 and the high-voltage pile head line board 5; the free end 12 of the test rod 1 is sleeved with an insulating sheath 4.
Compared with the prior art, the transformer high-voltage pile head test electrode provided by the embodiment has the following advantages:
when a technician regularly performs electrical test such as direct current resistance test and insulation resistance test on the transformer, the insulation sheath 4 is taken down from the test rod 1, and the test clamp of the electrical test instrument is clamped at the free end 12 of the test rod 1, and the test rod 1 is connected with the high-voltage pile head line board 5, so that the electrical test instrument is connected with the high-voltage pile head line board 5 to perform electrical test on the transformer.
An insulating layer 51 is arranged outside the high-voltage pile head line board 5 and outside the connection part of the test rod 1 and the high-voltage pile head line board 5, namely, an insulating adhesive tape is wound, only the free end 12 of the test rod 1 is exposed, and after the electric test is finished, the insulating sheath 4 is sleeved outside the free end 12, so that the fully-sealed insulating coating of the pile head is realized; when the electric test instrument is used for testing the transformer, the insulating sheath 4 is directly taken down to expose the free end 12, and the electric test instrument is connected with the free end 12 of the test rod 1 so as to realize the test of the transformer. Because the insulating adhesive tape wound outside the high-voltage pile head line board 5 is not required to be taken down during testing, only the insulating sheath 4 is required to be taken down, and the live fire insulating treatment is not required to be performed outside the high-voltage pile head line board 5 after testing, and only the insulating sheath 4 is required to be sleeved on the free end 12, the labor capacity of workers can be saved, the working efficiency of the workers can be improved, and the operation risk can be reduced.
Fig. 2 is a schematic structural diagram of connection between a test rod and a first fixing member in a testing electrode of a high-voltage pile head of a transformer according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of an insulating sheath in a testing electrode of a high-voltage pile head of a transformer according to an embodiment of the present invention.
In order to enable the test rod 1 to be firmly connected with the high-voltage pile head line board 5 and the insulating sheath 4, and facilitate the insulating sheath 4 to be taken down from the test rod 1 so as to expose the free end 12, and facilitate the connection of the test rod 1 with an electrical test instrument, in the high-voltage pile head test electrode of the transformer provided by the embodiment, as shown in fig. 2 and fig. 4-5, an external thread is arranged at one end of the test rod 1 far away from the free end 12, a screw hole is arranged on the high-voltage pile head line board 5, and the test rod 1 is penetrated through the screw hole and is in threaded connection with the high-voltage pile head line board 5; the port of the insulating sheath 4 is provided with an internal thread matching the external thread.
The test rod 1 is connected with the high-voltage pile head line board 5 through threads, and the insulating sheath 4 is connected with the test rod 1 through threads, so that the test rod 1 can be firmly connected with the high-voltage pile head line board 5 and the insulating sheath 4, and the insulating sheath 4 can be conveniently taken down and installed from the test rod 1.
Winding insulating tapes on one end of the test rod 1 far away from the free end 12 and the outside of the high-voltage pile head line board 5, and exposing only the free end 12 of the test rod 1; the free end 12 is sleeved with an insulating sheath 4, so that the test rod 1 and the high-voltage pile head line board 5 are subjected to full-sealing insulation treatment; when the transformer is electrically tested, only the insulating sheath 4 is required to be unscrewed from the free end 12, so that compared with the prior art, a great amount of time and labor can be saved, the working efficiency is improved, and the labor intensity of workers is reduced.
Specifically, in order to firmly connect the high-voltage pile head line board 5 with the drainage board 6, so as to achieve better power transmission, in the high-voltage pile head test electrode for the transformer provided in this embodiment, as shown in fig. 1 and fig. 5, the high-voltage pile head test electrode for the transformer further includes a first fixing piece 2, and a screw hole is formed in the first fixing piece 2; the high-pressure pile head line board 5 is connected with a drainage board 6, the drainage board 6 is provided with a mounting hole, the test rod 1 sequentially penetrates through a screw hole and the mounting hole of the high-pressure pile head line board 5 and is in threaded connection with the first fixing piece 2, so that the high-pressure pile head line board 5 is tightly attached to the drainage board 6.
The first fixing member 2 may be a nut.
The first fixing piece 2 is arranged on the test rod 1 in a penetrating mode and is positioned between the drainage plate 6 and the free end 12, the high-voltage pile head line plate 5 and the first fixing piece 2 are connected in a threaded mode through the test rod 1 respectively, so that the drainage plate 6 is extruded towards the high-voltage pile head line plate 5 until the drainage plate 6 is tightly attached to the high-voltage pile head line plate 5, drainage lines are connected to the drainage plate 6, and therefore the current of the transformer is well conveyed out.
Fig. 3 is a schematic structural diagram of an insulating tube in a testing electrode of a high-voltage pile head of a transformer according to an embodiment of the present invention.
Further, in order to further improve the quality of the fully sealed insulation treatment of the high-voltage pile head of the transformer so as to prevent short circuit faults in the near region of the transformer, in the testing electrode of the high-voltage pile head of the transformer, as shown in fig. 1-3, the testing electrode of the high-voltage pile head of the transformer further comprises an insulation tube 3, the insulation tube 3 is sleeved outside the testing rod 1, and one end of the insulation tube 3 is in threaded connection with the testing rod 1 and is abutted against the first fixing piece 2; the insulating tube 3 is provided with external threads at one end far away from the first fixing part 2, and the insulating sheath 4 is provided with internal threads matched with the external threads of the insulating tube 3.
One end that insulating tube 3 is close to first mounting 2 sets up the internal thread that matches with external screw thread on the test rod 1 to make threaded connection between insulating tube 3 and the test rod 1, not only convenient to detach, connection stability is better moreover.
Insulating adhesive tapes are wound on the outer part of the high-voltage pile head line board 5, the outer part of the joint of the test rod 1 and the high-voltage pile head and the outer part of the connection of the insulating tube 3 and the test rod 1, the insulating sheath 4 is in threaded connection with one end of the insulating tube 3, which is far away from the first fixing piece 2, so that the transformer high-voltage pile head line board 5, one end of the test rod 1, which is far away from the free end 12, and the first fixing piece 2 are all coated by the insulating adhesive tapes, and the free end 12 of the test rod 1 is coated by the insulating sheath 4, thereby further improving the quality of the fully-sealed insulating treatment of the transformer high-voltage pile head.
Further, in order to further improve the connection stability of the high-voltage pile head line board 5 and the drainage board 6, so as to achieve better power transmission, in the high-voltage pile head test electrode for the transformer provided in this embodiment, as shown in fig. 1 and fig. 5, one end of the test rod 1, which is far away from the free end 12, is provided with a second fixing piece 11, and the second fixing piece 11 is connected with the test rod 1.
The second fixing piece 11 can be integrally formed with the test rod 1, and can also be connected in a welding, bonding, screwing mode and the like.
The one end of the test rod 1, which is close to the high-voltage pile head line board 5, is connected with the second fixing piece 11, and the one end of the test rod 1, which is close to the drainage board 6, is connected with the first fixing piece 2, the second fixing piece 11 clamps the high-voltage pile head line board 5 and the drainage board 6 together, and the first fixing piece 2 is made to be close to the drainage board 6 by rotating the first fixing piece 2 so as to drive the drainage board 6 to be tightly attached to the high-voltage pile head line board 5, so that the current of the transformer is well conveyed.
Further, in order to reduce the contact resistance between the high-voltage pile head line board 5 and the second fixing member 11 and the contact resistance between the drainage board 6 and the first fixing member 2 as much as possible, thereby ensuring the accuracy of the electrical test data of the transformer, in the high-voltage pile head test electrode for the transformer provided in this embodiment, as shown in fig. 1 and 5, the side, close to the high-voltage pile head line board 5, of the first fixing member 2 and the second fixing member 11 is respectively provided with a conductive layer.
By arranging the conductive layer on the first fixing piece 2 and the second fixing piece 11, which are close to one side of the high-voltage pile head line board 5 of the transformer, the problem that the contact resistance of the first fixing piece 2, the second fixing piece 11 and the high-voltage pile head line board 5 is overlarge can be solved, and the accuracy of the electrical test data of the transformer is ensured.
Specifically, in order to reduce the contact resistance between the high-voltage pile head line board 5 and the second fixing piece 11 and the contact resistance between the drainage board 6 and the first fixing piece 2 as much as possible, so as to ensure the accuracy of the electrical test data of the transformer, the conductive layer is conductive paste arranged on the first fixing piece 2 and the second fixing piece 11, and the conductive paste is coated on one surface, close to the high-voltage pile head line board 5, of the first fixing piece 2 and the second fixing piece 11.
Furthermore, in order to ensure the quality of the fully sealed insulation treatment of the high-voltage pile head line board 5 of the transformer, when the transformer is tested regularly by using the electrical test instrument, the worker does not need to detach the insulating tape wound on the high-voltage pile head one by one, so that the workload of the worker is smaller, the working efficiency is higher, the operation risk is smaller, the transformer can comprise a transformer body 8, a transformer high-voltage sleeve 7, the transformer high-voltage pile head line board 5 and the transformer high-voltage pile head test electrode provided by the embodiment, one end of the transformer high-voltage sleeve 7 is connected with the transformer body 8, the other end is connected with the transformer high-voltage pile head line board 5, and one end of the test rod 1 far away from the free end 12 is connected with the transformer high-voltage pile head line board 5.
An insulating layer 51 is arranged outside the high-voltage pile head line board 5 and outside the connection part of the test rod 1 and the high-voltage pile head line board 5, namely, an insulating adhesive tape is wound, only the free end 12 of the test rod 1 is exposed, and after the electric test is finished, the insulating sheath 4 is sleeved outside the free end 12, so that the fully-sealed insulating coating of the pile head is realized; when the electric test instrument is used for testing the transformer, the insulating sheath 4 is directly taken down to expose the free end 12, and the electric test instrument is connected with the free end 12 of the test rod 1 so as to realize the test of the transformer.
Because the insulating adhesive tape wound outside the high-voltage pile head line board 5 is not required to be taken down during testing, only the insulating sheath 4 is required to be taken down, and the live fire insulating treatment is not required to be performed outside the high-voltage pile head line board 5 after testing, and only the insulating sheath 4 is required to be sleeved on the free end 12, the labor capacity of workers can be saved, the working efficiency of the workers can be improved, and the operation risk can be reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810841455.4A CN109030885B (en) | 2018-07-26 | 2018-07-26 | Transformer high voltage pile test electrode and transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810841455.4A CN109030885B (en) | 2018-07-26 | 2018-07-26 | Transformer high voltage pile test electrode and transformer |
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| Publication Number | Publication Date |
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| CN109030885A CN109030885A (en) | 2018-12-18 |
| CN109030885B true CN109030885B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810841455.4A Active CN109030885B (en) | 2018-07-26 | 2018-07-26 | Transformer high voltage pile test electrode and transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DK3528266T3 (en) | 2018-02-15 | 2021-01-04 | Abb Power Grids Switzerland Ag | INSULATION OF NON-LIQUID SUBMITTED TRANSFORMERS |
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| JP2008216161A (en) * | 2007-03-07 | 2008-09-18 | Tokyo Electric Power Co Inc:The | High voltage terminal block for substation test |
| CN204270821U (en) * | 2014-12-16 | 2015-04-15 | 天津天保电力有限公司 | A 35kV Transformer High Voltage Bushing Lead Wire Structure |
| CN204375549U (en) * | 2014-12-30 | 2015-06-03 | 国家电网公司 | The transformer high-voltage bushing of water proof and dust proof |
| CN204925181U (en) * | 2015-09-21 | 2015-12-30 | 国网江西省电力公司南昌供电分公司 | T type cable head convenient to high -voltage testing |
| CN107947101A (en) * | 2017-11-29 | 2018-04-20 | 国家电网公司 | Elbow-type cable terminal extension rod |
| CN208476977U (en) * | 2018-07-26 | 2019-02-05 | 国网青海省电力公司海东供电公司 | Transformer high voltage pile head test electrode and transformer |
-
2018
- 2018-07-26 CN CN201810841455.4A patent/CN109030885B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008216161A (en) * | 2007-03-07 | 2008-09-18 | Tokyo Electric Power Co Inc:The | High voltage terminal block for substation test |
| CN204270821U (en) * | 2014-12-16 | 2015-04-15 | 天津天保电力有限公司 | A 35kV Transformer High Voltage Bushing Lead Wire Structure |
| CN204375549U (en) * | 2014-12-30 | 2015-06-03 | 国家电网公司 | The transformer high-voltage bushing of water proof and dust proof |
| CN204925181U (en) * | 2015-09-21 | 2015-12-30 | 国网江西省电力公司南昌供电分公司 | T type cable head convenient to high -voltage testing |
| CN107947101A (en) * | 2017-11-29 | 2018-04-20 | 国家电网公司 | Elbow-type cable terminal extension rod |
| CN208476977U (en) * | 2018-07-26 | 2019-02-05 | 国网青海省电力公司海东供电公司 | Transformer high voltage pile head test electrode and transformer |
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| Publication number | Publication date |
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| CN109030885A (en) | 2018-12-18 |
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