CN112362975A - Transformer bushing test device - Google Patents
Transformer bushing test device Download PDFInfo
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- CN112362975A CN112362975A CN202011203482.2A CN202011203482A CN112362975A CN 112362975 A CN112362975 A CN 112362975A CN 202011203482 A CN202011203482 A CN 202011203482A CN 112362975 A CN112362975 A CN 112362975A
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- 238000012360 testing method Methods 0.000 title claims abstract description 120
- 230000010354 integration Effects 0.000 claims abstract description 18
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a transformer bushing test device, which comprises a plurality of first test cables, a plurality of second test cables and an integration component for connecting the first test cables and the second test cables, wherein one ends of the first test cables, which are far away from the integration component, are respectively connected with a dielectric loss instrument test contact, one ends of the second test cables, which are far away from the integration component, are respectively connected with a transformer bushing test point, and the integration component adjusts the connection of the first test cables and the second test cables. When the cable connector is used, a cable can be connected to a test point required to be connected with a transformer sleeve in advance, so that the connection between a first test cable and a second test cable can be adjusted by rotating the outer ring during testing; in the detection process, after the first test cable is connected with different second test cables to realize single installation, all required data can be measured, and the measurement efficiency is effectively improved.
Description
Technical Field
The invention relates to the technical field of transformer bushings, in particular to a transformer bushing test device.
Background
The transformer is an important link in the power transmission link, extra attention is needed in the using process, the sleeve of the transformer plays a role in protecting the transformer, but the long sleeve of the transformer is placed outdoors for a long time, and is exposed to the sun and rain, so that faults can occur frequently, the service life of the transformer is seriously influenced, and extra attention is needed in the actual work.
According to the regulations of preventive test regulations for power equipment, when a transformer with a capacitance of 3150kVA or more is overhauled or a winding and a bushing are necessary, the loss tangent value tan delta should be measured, if the dielectric loss value exceeds the standard, it means that the transformer may be affected with moisture, the insulation is aged, the oil quality is degraded, the oil sludge is attached to the insulation or the equipment insulation has serious defects, if the dielectric medium is seriously heated, the equipment has the danger of explosion and should be overhauled immediately, however in practice, for the tan delta measurement of large and medium-sized transformers, only the overall distributed defects can be found, because the loss increase caused by locally concentrated defects accounts for a small part of the total loss, that is, the loss increase caused by the bushing defects accounts for a small part of the total loss, therefore, to detect the insulation condition of the large-capacity transformer bushing, the dielectric loss tangent value and the dielectric loss value of the end screen to the ground of the bushing are measured separately.
When measuring transformer bushing through the loss appearance that is situated between at present, need link together transformer bushing's test contact with the loss appearance that is situated between through the cable according to appointed wiring route, but superhigh pressure transformer bushing is higher in the testing process of reality, lead to when measuring the data of difference, just need frequent the connection position of arranging the cable again of ascending a height of staff, the operation of ascending a height for a long time of staff not only has the problem of higher potential safety hazard, measure moreover and comparatively take time, it is very troublesome.
Disclosure of Invention
The invention aims to provide a transformer bushing test device, which aims to solve the technical problems that in the prior art, different data of a transformer bushing are measured, and a worker needs to frequently ascend to adjust the connecting position of a cable, so that high potential safety hazards exist and time is consumed.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
a transformer bushing test device comprises a plurality of first test cables, a plurality of second test cables and an integration component for connecting the first test cables and the second test cables;
one ends of the first test cables, which are far away from the integration component, are respectively connected with a dielectric loss instrument test contact, and one ends of the second test cables, which are far away from the integration component, are respectively connected with a transformer bushing test point; the integration component is used for adjusting the connection between the first test cable and the second test cable, respectively detecting the dielectric loss and the capacity of the main insulation of the transformer bushing, the dielectric loss and the capacity of the end screen to the ground through a dielectric loss instrument, and comparing the dielectric loss and the capacity of the main insulation and the end screen;
the integrated assembly comprises an inner shaft and a plurality of outer rings rotatably connected to the inner shaft, the inner shaft is further provided with a first cable connecting piece and a second cable connecting piece, the outer rings are connected with a first test cable through the first cable connecting piece, the outer rings are connected with a second test cable through the second cable connecting piece, and the outer rings rotate to enable the first cable connecting piece to be connected with or separated from the second cable connecting piece.
Optionally, the first cable connecting part includes a plurality of conductive rings connected to each of the first test cables, the conductive rings are sleeved on the inner shaft, the outer ring is provided with a conductive groove embedded with the conductive rings, and the conductive groove is electrically connected to the conductive groove through a contact copper sheet.
Optionally, the second cable connection member comprises a plurality of electrically conductive shafts connected to each of the second test cables, the plurality of electrically conductive shafts being disposed on the inner shaft and the plurality of electrically conductive shafts being disposed in an annular array about a central axis of the inner shaft; the conductive shaft is connected with a plurality of conductive rods, the conductive rods protrude out of the side wall of the inner shaft, and the conductive rods are arranged opposite to the outer ring; the outer ring is provided with a guide groove matched with the conductive rod, an arc-shaped conductive sheet matched with the guide groove is arranged in the guide groove, and the arc-shaped conductive sheet is electrically connected with the contact copper sheet.
Optionally, the end of the conductive rod is an arc-shaped structure attached to the arc-shaped conductive sheet.
Optionally, the first cable connector further comprises a first cable fixing member disposed at an end of the inner shaft; the first cable fixing piece comprises an embedded groove formed in the end of the inner shaft and a fixing cover plate screwed on the inner shaft through threads, and the fixing cover plate covers the embedded groove;
a plurality of mounting seats which are in one-to-one correspondence with and contact with the first test cables are arranged in the caulking groove, and the mounting seats are in one-to-one correspondence with and electrically connected with the conducting rings; the fixed cover plate is rotatably connected with an auxiliary fixed plate for the first test cable to penetrate through, and the fixed cover plate is screwed on the inner shaft through threads to drive one end of the first test cable to be embedded into the mounting seat and electrically connected with the conducting ring.
Optionally, the second cable connector further includes a second cable fixing member having the same structure as the first cable fixing member, and the second cable fixing member includes a plurality of mounting seats electrically connected to the conductive rod respectively.
Optionally, the positioning device further comprises a positioning assembly for positioning the outer ring, wherein the positioning assembly is located between the conductive groove and the guide groove, and comprises a positioning groove formed in the inner shaft, and the positioning groove is of an annular structure; a plurality of first arc-shaped positioning pieces are arranged in the positioning groove and are arranged in an annular array around the central axis of the inner shaft; the inboard of outer loop is provided with the second arc spacer with first arc spacer assorted, first arc spacer with the second arc spacer is crisscross the setting.
Compared with the prior art, the invention has the following beneficial effects:
when the cable connector is used, a cable can be connected to a test point required to be connected with a transformer sleeve in advance, so that the connection between a first test cable and a second test cable can be adjusted by rotating the outer ring during testing; in the detection process, after the first test cable is connected with different second test cables to realize single installation, all required data can be measured, and the measurement efficiency is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a second cable connecting member according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a positioning assembly according to an embodiment of the present invention;
fig. 4 is a partial structural diagram of a portion a in fig. 1.
The reference numerals in the drawings denote the following, respectively:
1-a first test cable; 2-a second test cable; 3-an integration component; 4-a first cable connector; 5-a second cable connector; 6-a first cable fixing; 7-a second cable fixture; 8-a positioning assembly;
301-inner shaft; 302-outer ring;
401-conductive ring; 402-a conductive slot; 403-contact copper sheet;
501-a conductive shaft; 502-a conductive rod; 503-a guide groove; 504-arc conductive sheet;
601-caulking groove; 602-securing a cover plate; 603-auxiliary fixing plate; 604-a mounting seat;
801-positioning grooves; 802-a first arc spacer; 803-second arc spacer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, the present invention provides a transformer bushing test apparatus, which includes a plurality of first test cables 1, a plurality of second test cables 2, and an integration component 3 for connecting the first test cables 1 and the second test cables 2.
One ends of the first test cables 1, which are far away from the integration component 3, are respectively connected with the dielectric loss instrument test contacts, and one ends of the second test cables 2, which are far away from the integration component 3, are respectively connected with the transformer bushing test points; the integration component 3 is used for adjusting the connection between the first test cable 1 and the second test cable 2, and detecting the dielectric loss and the capacity of the main insulation of the transformer bushing, the dielectric loss and the capacity of the end screen to the ground, and the dielectric loss and the capacity of the main insulation and the end screen to each other through a dielectric loss instrument.
Here, the first test cable 1 and the second test cable 2 are disposed opposite to each other, the first test cable 1 is disposed at least four, it comprises cables connected with a flange of a transformer bushing, cables connected with the input end of a test article, cables connected with the input end of a standard capacitor and cables connected with a conductive rod, at least four second testing cables 2 are arranged, it comprises a grounding wire, a cable connected with a small sleeve on the transformer sleeve and two cables connected with a conducting rod, further can complete all wiring connections once when in use, and furthermore, the dielectric loss and the capacity of the main insulation of the transformer bushing, the dielectric loss and the capacity of the end screen to the ground and the dielectric loss and the capacity of the main insulation and the end screen to the ground can be detected by changing the connection mode of the first test cable 1 and the second test cable 2 during measurement.
Can be higher avoiding transformer bushing mounted position, lead to every test a data, just possess and need the staff to ascend a height the operation and adjust the wiring position, it not only has great potential safety hazard, and is comparatively time-consuming moreover.
The integration component 3 comprises an inner shaft 301 and a plurality of outer rings 302 rotatably connected to the inner shaft 301, a first cable connecting piece 4 and a second cable connecting piece 5 are further arranged on the inner shaft 301, the outer rings 302 are connected with a first test cable 1 through the first cable connecting piece 4, the outer rings 302 are connected with a second test cable 2 through the second cable connecting piece 5, and the outer rings 302 rotate to enable the first cable connecting piece 4 to be connected with or separated from the second cable connecting piece 5.
The number of the outer rings 302 and the number of the second test cables 2 are set relatively, so that each outer ring 302 can control the connection state of one cable, and in the actual use process, a user can adjust the number of the outer rings 302 according to the actual use requirement of the user, so that the outer rings can be suitable for different detection modes, and the outer rings are wider in application range.
The first cable connecting member 4 includes a plurality of conductive rings 401 connected to each of the first test cables 1, the plurality of conductive rings 401 are sleeved on the inner shaft 301, a conductive groove 402 engaged with the conductive rings 401 is formed on the outer ring 302, and the conductive groove 402 is electrically connected to the conductive groove 402 through a contact copper sheet 403.
The conducting ring 401 also plays a limiting role, when the outer ring 302 rotates, the outer ring 302 can rotate at a specified position on the inner shaft 301 through the matching of the conducting ring 401 and the conducting groove 402, the contact copper sheet 403 mainly plays a role of power connection, and the conducting layer matched with the contact copper sheet 403 is arranged on the side wall of the conducting groove 402, so that the conducting ring 401 can always keep a contact state with the conducting groove 402 when the outer ring 302 rotates, and the electrical connection between the conducting ring 401 and the conducting groove 402 is realized.
As shown in fig. 1 and 2, the second cable connecting member 5 includes a plurality of conductive shafts 501 connected to each second test cable 2, the plurality of conductive shafts 501 are disposed on the inner shaft 301 and are arranged in an annular array with respect to a central axis of the inner shaft 301, the conductive shafts 501 are opposite to the second test cables 2, and one of the conductive shafts 501 is in an idle state, so that the first test cable 1 and the second test cable 2 can be maintained in a non-contact state according to requirements when in use.
The conductive shaft 501 is connected with a plurality of protruding inner shaft 301 side walls, the conductive rod 502 is arranged opposite to the outer ring 302, the outer ring 302 is provided with a guide groove 503 matched with the conductive rod 502, the guide groove 503 is internally provided with an arc conductive sheet 504 matched with the guide groove 503 and electrically connected with the contact copper sheet 403, the arc conductive sheet 504 has certain elasticity, and can be stably contacted with the conductive rod 502 by utilizing the elasticity when in use, the outer ring 302 rotates to drive the arc conductive sheet 504 to be electrically connected with one conductive rod 502, so that the first test cable 1 is electrically connected with one of the plurality of second test cables 2.
When using, rotate the motion that outer ring 302 can drive arc conducting strip 504, further can control to make arc conducting strip 504 contact with one of them conducting rod 502, and because arc conducting strip 504 is electric connection with contact copper sheet 403, and conducting ring 401 and conducting groove 402 are the state of keeping in contact all the time, consequently can be when using, control first test cable 1 and second test cable 2's being connected, thereby can be according to the demand of test, change the wiring mode to transformer bushing, can be more convenient during the test.
The end of the conducting rod 502 is an arc structure attached to the arc conducting strip 504, and the arc structure can fix the connection state of the conducting rod 502 and the arc conducting strip 504 when in use, so that the stability of the connection state can be effectively improved.
As shown in fig. 1 and 4, the first cable connecting member 4 further includes a first cable fixing member 6 disposed at an end of the inner shaft 301, the first cable fixing member 6 includes an insertion groove 601 formed at the end of the inner shaft 301, and a fixing cover plate 602 screwed to the inner shaft 301 through a screw, the fixing cover plate 602 covers the insertion groove 601, an auxiliary fixing plate 603 for the first test cable 1 to pass through is rotatably connected to the fixing cover plate 602, the auxiliary fixing plate 603 can rotate on the fixing cover plate 602, so that after the first test cable 1 is fixed to the auxiliary fixing plate 603, when the fixing cover plate 602 is screwed to the inner shaft 301 through a screw, the problem that the first test cables 1 are wound together due to the rotation of the fixing cover plate 602 can be avoided.
A plurality of mounting seats 604 in contact with and matching with the first test cable 1 are disposed in the caulking groove 601, each mounting seat 604 is electrically connected to one of the conductive rings 401, and the fixed cover plate 602 is screwed to the inner shaft 301 through a thread to drive one end of the first test cable 1 to be embedded in the mounting seat 604 and electrically connected to the conductive ring 401.
It should be noted that the first test cable 1 is preferably connected to the fixed cover 602 by a spring, so that when the end of the first test cable 1 is gradually inserted into the mounting seat, the first test cable 1 can be pressed by the force of the spring to realize a stable connection between the first test cable 1 and the mounting seat 604.
In order to further improve the stability of the connection between the mounting seat 604 and the first test cable 1, the terminal of the mounting seat 604 and the first test cable 1 may be connected by selecting an aviation socket and an aviation plug to be matched, and the fixed cover 602 assists the connection therebetween to further enhance the stability of the connection.
The second cable connecting member 5 further includes a second cable fixing member 7 having the same structure as the first cable fixing member 6, and each of the mounting seats 604 of the second cable fixing member 7 is electrically connected to one of the conductive rods 502.
As shown in fig. 1 and fig. 3, the positioning device further includes a positioning assembly 8 for positioning the outer ring 302, the positioning assembly 8 is located between the conductive groove 402 and the guide groove 503, and includes a positioning groove 801 opened on the inner shaft 301, and the positioning groove 801 is of an annular structure; a plurality of first arc-shaped positioning pieces 802 are arranged in the positioning groove 801, and the first arc-shaped positioning pieces 802 are arranged in an annular array around the central axis of the inner shaft 301; the inner side of the outer ring 302 is provided with a second arc-shaped positioning piece 803 matched with the first arc-shaped positioning piece 802, and the first arc-shaped positioning piece 802 and the second arc-shaped positioning piece 803 are arranged in a staggered manner, so that the outer ring 302 controls the first test cable 1 to be electrically connected with a plurality of second test cables 2.
In addition, the number of the first arc-shaped positioning pieces 802 and the second arc-shaped positioning pieces 803 is set according to the number of the conducting rods 502, that is, a position where the arc-shaped conducting piece 504 cannot contact with the conducting rods is reserved, so that the wiring measurement can be carried out according to the requirement during the use.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (7)
1. The transformer bushing test device is characterized by comprising a plurality of first test cables (1), a plurality of second test cables (2) and an integration component (3) for connecting the first test cables (1) and the second test cables (2);
one ends of the first test cables (1) far away from the integration component (3) are respectively connected with a dielectric loss instrument test contact, and one ends of the second test cables (2) far away from the integration component (3) are respectively connected with a transformer bushing test point; the integration component (3) is used for adjusting the connection between the first test cable (1) and the second test cable (2), and respectively detecting the dielectric loss and the capacity of the main insulation of the transformer bushing, the dielectric loss and the capacitance of the end screen to the ground through a dielectric loss instrument, and comparing the dielectric loss and the capacitance of the main insulation and the end screen;
the integrated assembly (3) comprises an inner shaft (301) and a plurality of outer rings (302) which are rotatably connected to the inner shaft (301), a first cable connecting piece (4) and a second cable connecting piece (5) are further arranged on the inner shaft (301), the outer rings (302) are connected with a first test cable (1) through the first cable connecting piece (4), the outer rings (302) are connected with a second test cable (2) through the second cable connecting piece (5), and the outer rings (302) rotate to enable the first cable connecting pieces (4) to be connected with or separated from the second cable connecting pieces (5).
2. The transformer bushing test device according to claim 1, wherein the first cable connecting member (4) comprises a plurality of conductive rings (401) connected to the first test cables (1), the plurality of conductive rings (401) are sleeved on the inner shaft (301), the outer ring (302) is provided with a conductive groove (402) embedded with the conductive rings (401), and the conductive groove (402) is electrically connected with the conductive groove (402) through a contact copper sheet (403).
3. A transformer bushing test apparatus according to claim 2, characterized in that said second cable connection member (5) comprises a plurality of electrically conductive shafts (501) connected to each of said second test cables (2), said plurality of electrically conductive shafts (501) being arranged on the inner shaft (301), and said plurality of electrically conductive shafts (501) being arranged in an annular array about the central axis of the inner shaft (301); a plurality of conductive rods (502) are connected to the conductive shaft (501), the conductive rods (502) protrude out of the side wall of the inner shaft (301), and the conductive rods (502) are arranged opposite to the outer ring (302); the outer ring (302) is provided with a guide groove (503) matched with the conductive rod (502), an arc-shaped conductive sheet (504) matched with the guide groove (503) is arranged in the guide groove (503), and the arc-shaped conductive sheet (504) is electrically connected with the contact copper sheet (403).
4. The transformer bushing test device according to claim 3, wherein the end of the conductive rod (502) is an arc-shaped structure attached to the arc-shaped conductive sheet (504).
5. A transformer bushing test device according to claim 2, characterized in that the first cable connection (4) further comprises a first cable fixture (6) arranged at one end of the inner shaft (301); the first cable fixing piece (6) comprises a caulking groove (601) formed in the end of the inner shaft (301) and a fixing cover plate (602) screwed to the inner shaft (301) through threads, and the fixing cover plate (602) is covered on the caulking groove (601);
a plurality of mounting seats (604) which are in one-to-one correspondence with and contact with the first test cables (1) are arranged in the caulking groove (601), and the mounting seats (604) are in one-to-one correspondence with and electrically connected with the conducting rings (401); the fixed cover plate (602) is rotatably connected with an auxiliary fixing plate (603) for the first test cable (1) to penetrate through, the fixed cover plate (602) is screwed on the inner shaft (301) through threads, and one end of the first test cable (1) is driven to be embedded into the mounting seat (604) and electrically connected with the conducting ring (401).
6. The transformer bushing test device according to claim 5, wherein the second cable connector (5) further comprises a second cable fixing member (7) having the same structure as the first cable fixing member (6), and the second cable fixing member (7) comprises a plurality of mounting seats electrically connected to the conductive rods (502).
7. The transformer bushing test device according to claim 2, further comprising a positioning assembly (8) for positioning the outer ring (302), wherein the positioning assembly (8) is located between the conductive groove (402) and the guide groove (503), and comprises a positioning groove (801) formed in the inner shaft (301), and the positioning groove (801) is of an annular structure; a plurality of first arc-shaped positioning pieces (802) are arranged in the positioning groove (801), and the first arc-shaped positioning pieces (802) are arranged in an annular array around the central axis of the inner shaft (301); the inboard of outer ring (302) is provided with second arc spacer (803) with first arc spacer (802) assorted, first arc spacer (802) with second arc spacer (803) are the setting of staggering.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011203482.2A CN112362975B (en) | 2020-11-02 | 2020-11-02 | Transformer bushing test device |
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| CN202011203482.2A CN112362975B (en) | 2020-11-02 | 2020-11-02 | Transformer bushing test device |
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| CN112362975A true CN112362975A (en) | 2021-02-12 |
| CN112362975B CN112362975B (en) | 2022-07-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117783952A (en) * | 2024-02-26 | 2024-03-29 | 四川天中星航空科技有限公司 | Comprehensive tester for cable characteristics of airplane |
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