CN107957537A - Transformer voltage-withstand test frock - Google Patents
Transformer voltage-withstand test frock Download PDFInfo
- Publication number
- CN107957537A CN107957537A CN201711406925.6A CN201711406925A CN107957537A CN 107957537 A CN107957537 A CN 107957537A CN 201711406925 A CN201711406925 A CN 201711406925A CN 107957537 A CN107957537 A CN 107957537A
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- Prior art keywords
- plate
- transformer
- withstand test
- detection
- test frock
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- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 24
- 230000009466 transformation Effects 0.000 claims description 3
- 238000000844 transformation Methods 0.000 claims description 2
- 238000000105 evaporative light scattering detection Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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
- G01R31/12—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
- 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
- G01R1/067—Measuring probes
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a kind of transformer voltage-withstand test frock, including base, the supporting rack being connected on base, it is connected to holding down assembly on supporting rack and the monitor station being connected on base, monitor station includes the positioning plate being fixed on base and is connected to the detection plate above positioning plate and being vertically movable by elastic component, the detect tank of multiple placement transformers is provided with detection plate, the bottom of detect tank is provided with several detection holes passed through for the stitch of transformer, the metal probe for detecting transformer resistance to pressure is provided with positioning plate, the detection hole of metal probe and transformer corresponds, voltage-withstand test of the present invention by elastic component connected positioning plate and detection plate into line transformer, multiple transformers can be once assembled at the same time carries out voltage-withstand test, it is simple in structure, it is easy to operate, work efficiency is high, it is adapted to mass detection.
Description
Technical field
The invention belongs to frock field, and in particular to transformer voltage-withstand test frock.
Background technology
At present, existing transformer can only test a transformer every time when carrying out voltage-withstand test, and a transformer is surveyed
Trying the time needs 3 minutes, the testing time is longer and dress to change transformer operating relatively time-consuming so that work testing efficiency is extremely low, therefore
It cannot meet the large-scale detection in enterprise's production, meanwhile, when the prior art carries out voltage-withstand test to transformer, easily produce
Cause detection inaccuracy or the situation of damage transformer because installation is not in place.
The content of the invention
The technical problems to be solved by the invention are just to provide a kind of transformer that batch voltage-withstand test is carried out to transformer
Voltage-withstand test frock.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：Transformer voltage-withstand test frock, including bottom
Seat, the supporting rack being connected on base, be connected to holding down assembly on supporting rack and the monitor station being connected on base, detects
Platform includes the positioning plate being fixed on base and is connected to the detection plate above positioning plate and being vertically movable by elastic component,
The detect tank of multiple placement transformers is provided with detection plate, the bottom of detect tank is provided with several and is worn for the stitch of transformer
The detection hole crossed, the metal probe for detecting transformer resistance to pressure, the inspection of metal probe and transformer are provided with positioning plate
Gaging hole corresponds.
Further, elastic component is spring, and positioning column is socketed with spring, restriction detection plate is provided with the top of positioning column
The stop nut of height.
Further, the bottom plate of detect tank is metallic plate.
Further, positioning plate is transparent positioning plate.
Further, supporting rack includes two vertical support columns being connected on base and is connected between two support columns
Support plate, the adjustment hole of the strip for adjusting the height that holds down assembly is provided with support plate.
Further, hold down assembly including fixing fixed plate on the supporting plate by locking member, being connected under fixed plate
The spacing ring of side, the push rod hinged with fixed plate top and the hinged interlocking lever of push rod, pulled by interlocking lever and erected in spacing ring
Compression bar that translation is moved and the pressing plate for being connected horizontally on compression bar bottom, compression bar are hinged with interlocking lever.
Further, it is equipped with the adjusting bolt being threadedly coupled with compression bar on pressing plate, the head of adjusting bolt and pressing plate
Bottom surface offsets.
Further, locking member includes locking nut and the clamping screw through adjustment hole, and position is provided with clamping screw
Anti-skid washer between locking nut and support plate.
Further, push rod includes articulated section and is less than the pushing part of 180 degree with articulated section angle.
Further, insulation sleeve is enclosed with pushing part.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, when no external pressure pulls down detection plate, bottom surface and the elastic component of detection plate offset, and keep balance；Detection
The detect tank of multiple placement transformers is provided with plate, the bottom of detect tank is provided with what several were passed through for the stitch of transformer
Detection hole, to adapt to the detection of the transformer of the stitch of different numbers, can both detect the transformer more than stitch quantity, can also
The few transformer of stitch quantity is detected, is more widely applied, meanwhile, transformer pin will not be caused to damage, positioning more may be used
Lean on；It is provided with the metal probe for detecting transformer resistance to pressure on positioning plate, the detection hole of metal probe and transformer is one by one
Corresponding, when without the voltage-withstand test of transformer, metal probe in the gap between positioning plate and detection plate, is prevented all the time
Only staff gets an electric shock when installing transformer, while detection plate forms metal probe and protects, and prevents external force bending metal from visiting
Pin, extends the service life of frock, and the voltage-withstand test by the frock into line transformer, can once assemble multiple transformations at the same time
Device carries out voltage-withstand test, simple in structure, easy to operate, and work efficiency is high, is adapted to mass detection.
2nd, elastic component is spring, and the top of spring and the bottom surface of detection plate offset, the bottom of spring and the top surface of positioning plate
Offset；During so that no external pressure pulling down detection plate, top surface and the stop nut of detection plate offset, bottom surface and spring phase
Support, keep balance, the stop nut at the top of positioning column can effectively limit the height of test board, positioning plate is arranged to transparent
, easy to observe base inside conductor connection, circuit damage is found in time.
3rd, the adjustment hole of two strips for adjusting the in the vertical direction height that holds down assembly is provided with support plate so that
Hold down assembly the height that can be adjusted on vertical direction, to adapt to the compression of the transformer to different model, different height.
4th, push rod is held along hinge joint rotating push-rod so that push rod rotates 180 degree, and push rod above hinge joint by becoming
Below hinge joint, push rod drives interlocking lever to move down, and interlocking lever promotes compression bar vertically to be moved down in spacing ring,
Compression bar band dynamic pressure plate compresses transformer to transformer direction, easy to operate laborsaving.
If after the 5th, having adjusted the height of fixed plate on the supporting plate, find the distance between pressing plate and test board and change to be measured
There is trickle gap between the size that depressor needs, can be by rotating the adjusting bolt being threadedly coupled with compression bar, to the height of pressing plate
Degree carries out small-scale adjusting.
6th, when fixed plate is adjusted to suitable height, the screw rod of clamping screw is extremely locked through fixed plate and adjustment hole
The head of bolt offsets with fixed plate, and anti-skid washer is then worn on the screw rod through adjustment hole and nut tighten admittedly
It is fixed so that fixed plate is fixedly secured on the supporting plate.
7th, push rod includes articulated section and is less than the pushing part of 180 degree with articulated section angle, and insulation is enclosed with pushing part
Set, pushing part and articulated section are in the angle less than 180 degree so that compression bar is when pulling down or pulling up pressing plate, pushing part
All the time tilting state is in, operates pushing part easy to staff, the insulation sleeve wrapped up on pushing part can effectively prevent work people
The electric shock accidents that member occurs by electric leakage in operation, it is safer.
Compared with prior art, pressure-resistant survey of the present invention by elastic component connected positioning plate and detection plate into line transformer
Examination, can once assemble multiple transformers at the same time and carry out voltage-withstand test, simple in structure, and easy to operate, work efficiency is high, be adapted to big
Batch detection.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and detailed description：
Fig. 1 is the stereogram A of transformer voltage-withstand test frock of the present invention；
Fig. 2 is the stereogram B of transformer voltage-withstand test frock of the present invention；
Fig. 3 is the stereogram C of transformer voltage-withstand test frock of the present invention；
Fig. 4 is the front view of transformer voltage-withstand test frock of the present invention；
Fig. 5 is the side view of transformer voltage-withstand test frock of the present invention.
Wherein：1st, base；2nd, supporting rack；21st, support column；22nd, support plate；221st, adjustment hole；3rd, hold down assembly；31st, lock
Tight part；311st, locking nut；312nd, clamping screw；313rd, anti-skid washer；32nd, fixed plate；33rd, spacing ring；34th, push rod；341、
Articulated section；342nd, pushing part；3421st, insulation sleeve；35th, interlocking lever；36th, compression bar；37th, pressing plate；371st, adjusting bolt；4th, detect
Platform；41st, positioning plate；411st, metal probe；42nd, detection plate；421st, detect tank；422nd, detection hole；43rd, spring；431st, positioning column；
432nd, stop nut.
Embodiment
The embodiment of transformer voltage-withstand test frock of the present invention is described further referring to figs. 1 to Fig. 5.
Transformer voltage-withstand test frock, including base 1, be connected on base 1 supporting rack 2, be connected on supporting rack 2
Hold down assembly 3 and the monitor station 4 that is connected on base 1, and monitor station 4 includes the transparent positioning plate 41 being fixed on base 1
And the detection plate 42 above positioning plate 41 and being vertically movable is connected to by elastic component, elastic component is distributed in detection plate 42
Four corners, while carrying out stablizing support to detection plate 42 so that when detection plate 42 moves down, elastic component stress everywhere is more
Uniformly, the service life of elastic component is extended, elastic component is spring 43, and positioning column 431 is socketed with spring 43, positioning column 431
Screw top is connected with the stop nut 432 for limiting 42 height of detection plate, and the top and the bottom surface of detection plate 42 of spring 43 offset,
The bottom of spring 43 and the top surface of positioning plate 41 offset；During so that no external pressure pulling down detection plate 42, detection plate 42
Top surface offset with stop nut 432, bottom surface offsets with spring 43, keep balance；Ten are provided with detection plate 42 and is placed and is become
The detect tank 421 of depressor, five detect tanks 421 are a row, and detect tank 421 is square, and the bottom of detect tank 421 is provided with some
The detection hole 422 that a stitch for transformer passes through, to adapt to the detection of the transformer of the stitch of different numbers, can both detect
Transformer more than stitch quantity, can also detect the few transformer of stitch quantity, be more widely applied, meanwhile, will not be to transformation
Device stitch causes to damage, and positioning is relatively reliable；The metal probe for detecting transformer resistance to pressure is provided with positioning plate 41
411, metal probe 411 and the detection hole 422 of transformer correspond, and when without the voltage-withstand test of transformer, metal is visited
Pin 411 in the gap between positioning plate 41 and detection plate 42, prevents staff from getting an electric shock when installing transformer, together all the time
When detection plate 42 to metal probe 411 formed protect, prevent external force bending metal probe 411, extend the service life of frock, gold
Belong to probe 411 to be electrically connected with the connecting pole on base 1 by conducting wire, the bottom plate of detect tank 421 is metallic plate.
Supporting rack 2 includes two vertical support columns 21 being connected on base 1 and is connected between two support columns 21
Support plate 22, support column 21 is plate-like, and two support columns 21 are parallel, the both sides of support plate 22 and the top phase of support column 21
Company, support plate 22 and support column 21 are vertical and support plate 22 and base 1 are vertical, and two adjusting compression groups are provided with support plate 22
The adjustment hole 221 of the strip of 3 in the vertical direction height of part so that holding down assembly 3 can adjust height on vertical direction,
To adapt to the compression of the transformer to different model, different height.
Hold down assembly 3 fixed plates 32 for including being fixed in support plate 22 by locking member 31, be connected under fixed plate 32
The spacing ring 33 of side, pull with push rod 34 hinged above fixed plate 32, the interlocking lever 35 hinged with push rod 34, by interlocking lever 35
The compression bar 36 of vertical shift and the pressing plate 37 of 36 bottom of compression bar is connected horizontally in spacing ring 33, compression bar 36 and interlocking lever 35
It is hinged.
Locking member 31 includes locking nut 311 and the clamping screw 312 through adjustment hole 221, is set on clamping screw 312
There is the anti-skid washer 313 between locking nut 311 and support plate 22；, will when fixed plate 32, which is adjusted, arrives suitable height
The screw rod of clamping screw 312 offsets through fixed plate 32 and adjustment hole 221 to the head of clamping screw 312 and fixed plate 32, so
It is then passed through wearing anti-skid washer 313 on the screw rod of adjustment hole 221 afterwards and nut carries out tightening fixation, it is equal in the corner of fixed plate 32
Installation locking part 31, the screw rod of two clamping screws 312 on same vertical curve are located in same adjustment hole 221 so that
Fixed plate 32 is fixedly secured in support plate 22.
Push rod 34 includes articulated section 341 and is less than the pushing part 342 of 180 degree, pushing part 342 with 341 angle of articulated section
On be enclosed with insulation sleeve 3421, pushing part 342 and articulated section 341 are in the angle less than 180 degree so that compression bar 36 is pulling down
Or when pulling up pressing plate 37, pushing part 342 is in tilting state all the time, pushing part 342, pushing part are operated easy to staff
The electric shock accidents that the insulation sleeve 3421 wrapped up on 342 can effectively prevent staff from occurring in operation by electric leakage, more pacifies
Entirely.
It is provided with respectively obliquely upward and the upper positioning protrusion of obliquely downward protrusion and lower positioning protrusion, pushes away in fixed plate 32
Bar 34 and upper positioning protrusion are hinged, and spacing ring 33 is fixed on lower positioning protrusion, and spacing ring 33 is in hollow cylindric, spacing ring
33 central shaft is vertical, and reinforcing rib is connected between upper positioning protrusion and lower positioning protrusion；Interlocking lever 35 includes left semi-ring and the right side
Semi-ring, left semi-ring and right semi-ring are combined into the cavity that can accommodate positioning protrusion, the top of interlocking lever 35 and the bending part of push rod 34
Divide and be hinged, lower part and compression bar 36 are hinged.
Pressing plate 37 is located at the surface of detection plate 42, and the adjusting bolt being threadedly coupled with compression bar 36 is equipped with pressing plate 37
371, the head and the bottom surface of pressing plate 37 of adjusting bolt 371 offset；If after having adjusted height of the fixed plate 32 in support plate 22,
It was found that having trickle gap between the size that the distance between pressing plate 37 and test board are needed with transformer to be measured, rotation can be passed through
The adjusting bolt 371 being threadedly coupled with compression bar 36, is adjusted the height of pressing plate 37, and the top of pressing plate 37 is provided with and adjusts
The adjusting nut that bolt 371 coordinates so that pressing plate 37 is always kept in a fixed state with adjusting bolt 371.
Testing procedure is as follows,
The first step, the adjusting of distance between pressing plate 37 and test board is carried out according to transformer：
First, when fixed plate 32, which is adjusted, arrives suitable height, the screw rod of clamping screw 312 through fixed plate 32 and is adjusted
Knothole 221 to the head of clamping screw 312 and fixed plate 32 offsets, and is then worn on the screw rod through adjustment hole 221 anti-skidding
Packing ring 313 and nut carry out tightening fixation, and the height of pressing plate 37 is adjusted on a large scale；
Then, the adjusting bolt 371 being threadedly coupled with compression bar 36 is rotated, small range adjusting is carried out to the height of pressing plate 37,
So that degree of regulation higher, the height of pressing plate 37 is more accurately bonded transformer.
Second step, Hi-pot Tester is connected with the connecting pole on base 1.
3rd step, transformer is placed into detect tank 421, the stitch insertion detection hole 422 of transformer.
4th step, holds the pushing part 342 of push rod 34, along hinge joint rotating push-rod 34 so that and push rod 34 rotates 180 degree,
Articulated section 341 becomes to be vertically positioned at below hinge joint by being vertically positioned above hinge joint, and push rod 34 drives interlocking lever 35 to moving down
Dynamic, interlocking lever 35 promotes compression bar 36 vertically to be moved down in spacing ring 33, and compression bar 36 is with dynamic pressure plate 37 to transformer direction
Transformer is compressed, transformer pulls down detection plate 42, and 42 stress of detection plate is unbalance, is moved downward to the stitch and gold of transformer
Belong to probe 411 to be in contact.
5th step, opens Hi-pot Tester, into the voltage-withstand test of line transformer.
6th step, so that 34 opposite direction of push rod rotates 180 degree after the completion of test, pressing plate 37 moves up, removes and detected
Complete transformer, detection plate 42 are recovered to top surface and stop nut 432 to offset under the action of spring 43.
Voltage-withstand test by the frock into line transformer, can once assemble multiple transformers at the same time and carry out pressure-resistant survey
Examination, simple in structure, easy to operate, work efficiency is high, is adapted to mass detection.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. transformer voltage-withstand test frock, it is characterised in that：Including base, the supporting rack being connected on base, it is connected to support
Holding down assembly on frame and the monitor station being connected on base, the monitor station include being fixed on positioning plate on base and
The detection plate above positioning plate and being vertically movable is connected to by elastic component, multiple placement transformations are provided with the detection plate
The detect tank of device, the bottom of detect tank are provided with several detection holes passed through for the stitch of transformer, are set on the positioning plate
It is equipped with the detection hole one-to-one corresponding of the metal probe for detecting transformer resistance to pressure, metal probe and transformer.
2. transformer voltage-withstand test frock according to claim 1, it is characterised in that：The elastic component is spring, spring
Positioning column is inside socketed with, the stop nut for limiting detection plate height is provided with the top of positioning column.
3. transformer voltage-withstand test frock according to claim 2, it is characterised in that：The bottom plate of the detect tank is metal
Plate.
4. transformer voltage-withstand test frock according to claim 3, it is characterised in that：The positioning plate is transparent positioning
Plate.
5. transformer voltage-withstand test frock according to any one of claims 1 to 4, it is characterised in that：Support frame as described above bag
Two vertical support columns being connected on base and the support plate being connected between two support columns are included, is set in the support plate
Have adjusting hold down assembly height strip adjustment hole.
6. transformer voltage-withstand test frock according to claim 5, it is characterised in that：It is described to hold down assembly including passing through lock
Tight part fixes fixed plate on the supporting plate, is connected to below fixed plate spacing ring, with push rod hinged above fixed plate, with
The hinged interlocking lever of push rod, pulled the compression bar of vertical shift in spacing ring by interlocking lever and be connected horizontally on compression bar bottom
Pressing plate, compression bar are hinged with interlocking lever.
7. transformer voltage-withstand test frock according to claim 6, it is characterised in that：It is equipped with the pressing plate and compression bar
The adjusting bolt of threaded connection, the head of the adjusting bolt and the bottom surface of pressing plate offset.
8. transformer voltage-withstand test frock according to claim 6, it is characterised in that：The locking member includes locking nut
With the clamping screw through adjustment hole, the non-slip mat being provided with the clamping screw between locking nut and support plate
Circle.
9. transformer voltage-withstand test frock according to claim 6, it is characterised in that：The push rod include articulated section and
It is less than the pushing part of 180 degree with the angle of articulated section.
10. transformer voltage-withstand test frock according to claim 9, it is characterised in that：It is enclosed with the pushing part absolutely
Edge set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711406925.6A CN107957537B (en) | 2017-12-22 | 2017-12-22 | Withstand voltage test fixture of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711406925.6A CN107957537B (en) | 2017-12-22 | 2017-12-22 | Withstand voltage test fixture of transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107957537A true CN107957537A (en) | 2018-04-24 |
| CN107957537B CN107957537B (en) | 2024-07-09 |
Family
ID=61956821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711406925.6A Active CN107957537B (en) | 2017-12-22 | 2017-12-22 | Withstand voltage test fixture of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107957537B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110244158A (en) * | 2019-06-06 | 2019-09-17 | 浙江八达电子仪表有限公司 | A kind of II type concentrator remote communication module batch detecting device and its detection method |
| CN111001582A (en) * | 2019-12-05 | 2020-04-14 | 东莞市善易机械科技有限公司 | Full-automatic comprehensive testing machine for transformer |
| CN112161875A (en) * | 2020-09-29 | 2021-01-01 | 康盛变压器(江苏)有限公司 | Component voltage withstand test tool for combined transformer and use method thereof |
| CN113484708A (en) * | 2021-09-08 | 2021-10-08 | 中国电子科技集团公司第九研究所 | High-efficiency voltage-withstanding testing device for circulator/isolator |
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