CN109473264A - A kind of oil-immersed transformer - Google Patents
A kind of oil-immersed transformer Download PDFInfo
- Publication number
- CN109473264A CN109473264A CN201811534098.3A CN201811534098A CN109473264A CN 109473264 A CN109473264 A CN 109473264A CN 201811534098 A CN201811534098 A CN 201811534098A CN 109473264 A CN109473264 A CN 109473264A
- Authority
- CN
- China
- Prior art keywords
- low
- clamping piece
- clamping
- voltage wire
- wire lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The present invention relates to a kind of oil-immersed transformers.A kind of oil-immersed transformer, including the lead fixed structure for being used to fix low-voltage wire lead row being arranged on upper clamping piece, the lead fixed structure includes that corresponding front-rear direction is arranged in low-voltage wire lead row two sides and is assemblied in two clamping units on low-voltage wire lead row by the fastening that fixed connection structure clamps, each clamping unit is respectively provided with the unidirectional clamping side with low-voltage wire lead row press cooperation in the longitudinal direction, each clamping unit, which also has, protrudes above the block boss of the unidirectional clamping side arrangement of the clamping unit in the direction towards two clamping unit relative inners, two block boss are corresponding to be arranged at left and right sides of low-voltage wire lead row, each block boss is respectively provided with for the stopping surface in the lateral direction with the cooperation of low-voltage wire lead row corresponding side block.The oil-immersed transformer solves the problems, such as that the bad bring transformer assembling of versatility is at high cost when low-voltage wire lead row is tight using lamination wood clamp in the prior art.
Description
Technical field
The present invention relates to a kind of oil-immersed transformers.
Background technique
Oil immersion-type distribution transformer is a kind of higher network voltage to be down to electrically setting for busbar voltage that user uses
It is standby, it is one of the important equipment in electrical power trans mission/distribution system.Authorization Notice No. is CN206711729U, authorized announcement date is
2017.12.05 Chinese utility model patent discloses a kind of transformer for wind-powered electricity generation low voltage lead structure, including fuel tank, iron core,
Coil, low-voltage copper bar, folder and wooden piece, low-voltage copper bar are low-voltage wire lead row, and coil covers on iron core, and folder is clamped in
Iron core both ends, low-voltage wire lead row is led to above iron core by coil and is fixed on folder by wooden piece, to keep insulation distance.On
It states wooden piece and fastens the lead fixed structure of the fixed low-voltage wire lead row of fastening bolt composition of wooden piece.
The existing wooden piece for fixing low-voltage wire lead row is mostly to be laminated wood, needs be laminated according to low-voltage wire lead row size
The slot passed through for the fastening bolt for connecting each lamination wood is opened up on wood.And for various sizes of low-voltage wire lead row, lamination wood
Slot position in structure is different, and it is bad to lead to be laminated the wooden versatility, needs to slot at transformer assembling scene, can reduce transformation
The assembly efficiency of device increases the assembly cost of transformer.
Summary of the invention
The purpose of the present invention is to provide a kind of oil-immersed transformers, low in oil-immersed transformer in the prior art to solve
The bad bring transformer assembling of versatility problem at high cost when voltage lead wires mining is tight with lamination wood clamp.
A kind of oil-immersed transformer of the invention adopts the following technical scheme that
A kind of oil-immersed transformer further includes folder including fuel tank, the iron core being arranged in fuel tank, the coil being wound around on iron core
It holds the upper clamping piece in iron core upper/lower terminal, lower clamping piece and the low pressure above iron core and vertically extended is led to by coil
Lead, oil-immersed transformer further include the lead fixed structure for being used to fix low-voltage wire lead row being arranged on upper clamping piece,
The thickness direction of low-voltage wire lead row is defined as front-rear direction, the width direction of low-voltage wire lead row is defined as left and right directions, institute
Stating lead fixed structure includes that corresponding front-rear direction is arranged in low-voltage wire lead row two sides and is clamped by fixed connection structure
Fasten two clamping units that are assemblied on low-voltage wire lead row, each clamping unit be respectively provided in the longitudinal direction with low-voltage wire lead row
The unidirectional clamping side of cooperation is pressed, each clamping unit, which also has, is protruding above this towards the direction of two clamping unit relative inners
The block boss of the unidirectional clamping side arrangement of clamping unit, two block boss are corresponding to be arranged at left and right sides of low-voltage wire lead row,
Each block boss is respectively provided with for the stopping surface in the lateral direction with the cooperation of low-voltage wire lead row corresponding side block.
The beneficial effects of the present invention are: being clamped in the longitudinal direction by unidirectional nip side in face of low-voltage wire lead row, block
Boss to low-voltage wire lead row block in the lateral direction, and by fixed connection structure by the fastening assembly of two clamping units in low pressure
On lead, so that low-voltage wire lead row is fixed on upper clamping piece.In addition, since two clamping units can be opposite before fastening assembly
It is mobile, therefore, in the fixation of low-voltage wire lead row on carrying out transformer, two clamping units can be directly taken, and draw according to low pressure
The distance between stopping surface in two clamping unit of width adjustment of line row, so that lead fixed structure be made to adapt to different in width
Low-voltage wire lead row grips, the lead fixed structure have versatility, do not need erecting yard carry out fluting or its
He processes, and solves when oil-immersed transformer mesolow lead is tight using lamination wood clamp in the prior art that versatility is bad brings
Transformer assembling problem at high cost.
It is processed for convenience of the design of clamping unit, clamping unit described in this programme is L-shaped clamping piece, the clamping piece
With the horizontal edge extended along the longitudinal direction and the vertical edge extended in left-right direction, the unidirectional clamping side is arranged in the vertical edge
On, the horizontal edge constitutes the block boss.
To further facilitate the processing of clamping piece, while guaranteeing the mechanical performance of clamping piece, clamping piece described in this programme
It is integrally formed by polyamide material.
It is adjusted for convenience according to relative position of the low-voltage wire lead row size to two clamping pieces, each clamping piece in this programme
Horizontal edge on be equipped with perforative horizontal edge mounting hole along the longitudinal direction, be respectively provided with and another folder on the vertical edge of each clamping piece
The corresponding vertical edge mounting hole of horizontal edge mounting hole on gripping member horizontal edge, the vertical edge mounting hole are the long hole extended in left-right direction,
The fixed connection structure includes that the vertical edge mounting hole, the horizontal edge mounting hole and correspondence are installed on the horizontal edge mounting hole
With the fastening bolt in the vertical edge mounting hole；Fastening bolt first can be installed on corresponding vertical edge mounting hole and horizontal edge mounting hole
Interior, then moving one of clamping piece is adapted to the distance of stopping surface on two clamping pieces with low-voltage wire lead row width, then will
Fastening bolt is fixed, facilitates the adjustment of two clamping piece relative positions.
For convenience of being fixedly connected for lead fixed structure and upper clamping piece, while simplifying lead fixed structure, this programme
Described in upper clamping piece be channel steel, reinforcing rib is fixed at the notch of channel steel, the reinforcing rib is equipped with and vertical edge mounting hole, horizontal edge
Mounting hole is corresponding to be passed through for the fastening bolt and then two clamping pieces is fixed on to the upper clamping piece mounting hole on upper clamping piece.
For the structural strength for guaranteeing clamping piece, the thickness of vertical edge described in this programme in the longitudinal direction is greater than the block
The thickness of boss in the longitudinal direction；Main function is played in clamping due to unidirectional nip side in face of low-voltage wire lead row, it erects
The structural strength that the thickness on side is greater than the thickness of horizontal edge to make the structural strength of vertical edge should be greater than horizontal edge, to guarantee clamping piece
The overall dimensions of clamping piece are minimized while structural strength, mitigate the weight of clamping piece.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the specific embodiment of oil-immersed transformer of the invention；
Fig. 2 is the state diagram of two clamping piece holding low-pressure leads in Fig. 1；
Fig. 3 is the main view of Fig. 2；
Fig. 4 is the top view of Fig. 3；
Fig. 5 is the structural schematic diagram of two clamping pieces in Fig. 2.
In figure: 1- iron core；2- upper clamping piece；3- copper bar；4- lead fixed structure；5- coil；6- clamping piece；7- reinforces
Muscle；8- unidirectionally clamps side；9- block boss；10- vertical edge mounting hole；11- horizontal edge mounting hole；12- stopping surface.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment of oil-immersed transformer of the invention, as shown in Figure 1, oil-immersed transformer includes fuel tank (in figure
Do not show), the iron core 1 being arranged in fuel tank and the coil 5 being wound around on iron core 1.Oil-immersed transformer further includes being clamped in iron
The upper clamping piece 2 of 1 upper/lower terminal of core, lower clamping piece and drawn by the low pressure vertically extended that coil 5 leads to 1 top of iron core
Line is arranged, and the low-voltage wire lead row in the present embodiment is copper bar 3.Lead fixed knot is fixed on the upper clamping piece 2 of oil-immersed transformer
Structure 4, copper bar 3 are clamped on lead fixed structure 4, to keep insulation distance.
As shown in Figures 2 to 5, lead fixed structure 4 includes two completely identical in structure clamping pieces 6, by copper bar 3
Thickness direction is defined as front-rear direction, and the width direction of copper bar 3 is defined as left and right directions, the corresponding front-rear direction of two clamping pieces 6
It is arranged in 3 two sides of copper bar.Clamping piece 6 in the present embodiment is L shape, and clamping piece 6 has the horizontal edge extended along the longitudinal direction and edge
The vertical edge that left and right directions extends, wherein having the unidirectional nip side with the press cooperation of copper bar 3 in the longitudinal direction on L-shaped vertical edge
Face 8；The horizontal edge of clamping piece 6 constitutes the unidirectional clamping side that the clamping piece 6 is protruded above towards the direction of two clamping pieces, 6 relative inner
The block boss 9 of 8 arrangements, two block boss 9 are corresponding to be arranged in 3 left and right sides of copper bar, and each block boss 9 is respectively provided with and copper bar
The stopping surface 12 of 3 corresponding side blocks cooperation.In addition, being equipped with perforative horizontal edge peace along the longitudinal direction on the horizontal edge of each clamping piece 6
Hole 11 is filled, is respectively provided on the vertical edge of each clamping piece 6 corresponding with the horizontal edge mounting hole 11 on another 6 horizontal edge of clamping piece perpendicular
Side mounting hole 10, wherein vertical edge mounting hole 10 is the long hole extended in left-right direction.Lead fixed structure 4 further includes by two folders
The fastening fastening bolt being assemblied on copper bar 3 and the nut being screwed in fastening bolt that gripping member 6 clamps.Clamping piece constitutes clamping
Unit, vertical edge mounting hole 10, horizontal edge mounting hole 11, fastening bolt and with fastening bolt cooperation nut composition be fixedly connected with knot
Structure.
In other embodiments, low-voltage wire lead row can also be the busbar of the other materials such as aluminium row；Clamping piece can also be for not
Regular shape need to only guarantee there is unidirectional clamping side and block boss on clamping piece；The horizontal edge and vertical edge of clamping piece
Can split settings, in use, vertical edge to be first fixed on to the suitable position of horizontal edge according to the size of copper bar, then again by two clamping pieces
Fastening is assemblied on copper bar；Fastening bolt can also be replaced by screw, can be set horizontal edge mounting hole to and screw fit at this time
Threaded hole；Or the side of horizontal edge mounting hole be adhesively fixed one with fastening bolt cooperation nut.
When carrying out the fixation of copper bar 3, two clamping pieces 6 are directly taken, two clamping pieces 6 are respectively corresponded and are placed on copper bar 3
Front and rear sides, keep the unidirectional clamping side 8 on two clamping pieces 6 staggered relatively；Then fastening bolt passes through corresponding vertical edge
Mounting hole 10 and horizontal edge mounting hole 11, make the stopping surface 12 of one of clamping piece 6 and a side contacts of 3 thickness direction of copper bar,
One side contacts of unidirectional clamping side 8 and 3 width direction of copper bar；Later, according to another mobile clamping piece 6 of the width of copper bar 3
Make the stopping surface 12 of another clamping piece 6 and another side contacts of 3 thickness direction of copper bar；Finally, nut driving is in fastening bolt
By the fastening assembly of two clamping pieces 6 on copper bar 3.
In other embodiments, vertical edge mounting hole and horizontal edge mounting hole can also be not provided on clamping piece, at this point, in two clampings
After the relative position of part determines, the fastening of two clamping pieces can be assembled on copper bar by band；Long hole on clamping piece can also be by
Spaced apart more than two circular holes replace in left-right direction, need to only select which circle on vertical edge according to the width of copper bar at this time
Hole and horizontal edge mounting hole are fixedly connected to just by fastening bolt, it should be noted that the distance between adjacent circular holes answer root
It is determined according to the width difference of common copper bar；When carrying out the fixation of copper bar, two clamping pieces first can also be individually positioned in low-voltage lead
Then the front and rear sides of row adjust the relative position between two clamping pieces, make the stopping surface and low-voltage wire lead row of two clamping pieces
Fastening bolt is passed through vertical edge mounting hole and horizontal edge mounting hole again later and two clamping pieces is fastened dress by the cooperation of left and right sides block
It fits on copper bar.
Copper bar 3 is clamped in the longitudinal direction by unidirectionally clamping side 8, block boss 9 to copper bar 3 in the lateral direction
Block, and assembled the fastening of two clamping pieces 6 on copper bar 3 by fixed connection structure, so that copper bar 3 is fixed on upper clamping piece 2
On.In addition, since two clamping pieces 6 can relatively move before being fixedly connected, when carrying out the fixation of copper bar 3, can directly take
With two clamping pieces 6, and according to the distance between two stopping surface 12 of the width adjustment of copper bar 3 L, it is fixedly clamped in two clamping pieces 6
After on copper bar 3, the space D of two unidirectional clamping sides 8 is equal to the thickness of copper bar 3, and lead fixed structure 4 is made to adapt to different rulers
Very little copper bar 3 grips, the lead fixed structure 4 have versatility, do not need erecting yard carry out fluting or its
He processes, and solves versatility bad bring transformation when copper bar is tight using lamination wood clamp in oil-immersed transformer in the prior art
The high problem of device assembly cost.
For convenience of being fixedly connected for lead fixed structure 4 and upper clamping piece 2, the upper clamping piece 2 in the present embodiment is channel steel, slot
Reinforcing rib 7 is welded at the notch of steel, reinforcing rib 7 is equipped with upper clamping piece corresponding with vertical edge mounting hole 10, horizontal edge mounting hole 11
Mounting hole.Before fastening bolt passes through vertical edge mounting hole 10, horizontal edge mounting hole 11 does not fasten, installed also cross upper clamping piece
Hole is fixed in fastening bolt after the adjustment of two clamping pieces, 6 position is suitable, then by nut driving.In this way, being fixedly connected with two folders
While gripping member 6, i.e., lead fixed structure 4 is fixed on upper clamping piece 2, not only eliminate in lead fixed structure 4 or
The special connection structure for being fixedly connected with lead fixed structure 4 with upper clamping piece 2 is set on upper clamping piece 2, and facilitates lead
Row's fixed structure 4 is fixedly connected with upper clamping piece 2.It should be noted that same lead fixed structure 4 or so in the present embodiment
The two sides in direction are fixedly connected with two reinforcing ribs 7 respectively, that is, need to weld two reinforcing ribs 7 on channel steel, and in each reinforcement
Upper clamping piece mounting hole corresponding with the vertical edge mounting hole 10 of same clamping piece 6, horizontal edge mounting hole 11 is opened up on muscle 7 respectively.
In addition, for convenience of the processing of clamping piece 6, while guaranteeing the mechanical performance of clamping piece 6, the clamping piece in the present embodiment
6 by polyurethane material integrated injection molding.For the weight for mitigating clamping piece 6, the clamping piece 6 in the present embodiment be exterior panel,
Interior tendon plank frame.The lead fixed structure 4 of oil-immersed transformer of the invention has the advantage that and is laminated the wooden phase
Than polyurethane material is unlikely to deform, and keeps the chuck(ing) capacity of clamping piece 6 stronger, mechanical performance is more preferable；It is versatile, two clamping pieces 6
Relative position can be adjusted according to the width of copper bar, be suitble to different capabilities oil immersion-type distribution transformer copper bar 3 folder
It fastens；Clamping piece 6 guarantees lead fixed structure 4 to the folder steady in a long-term of copper bar 3 using the polyamide material insoluble in oil
Hold fixation.
In other embodiments, the two sides of same lead fixed structure left and right directions can be with the fixed company of same reinforcing rib
Connect, at this time the width of reinforcing rib should be greater than or equal to clamping piece left and right directions size, to provide foot for lead fixed structure
Enough mounting surfaces；Clamping piece can also be fixed on reinforcing rib by way of being bonded or being clamped；It can also be in complete polyurethane sheet
On dig up a strip block and form L-shaped clamping piece；In the longitudinal direction, the thickness of vertical edge also can be equal to or be less than block it is convex
The thickness of platform.
Claims (6)
1. a kind of oil-immersed transformer further includes including fuel tank, the iron core being arranged in fuel tank, the coil being wound around on iron core
It is clamped in the upper clamping piece of iron core upper/lower terminal, lower clamping piece and is led to above iron core and vertically extended low by coil
Voltage lead wires row, oil-immersed transformer further include the lead fixed knot for being used to fix low-voltage wire lead row being arranged on upper clamping piece
Structure, characterized in that the thickness direction of low-voltage wire lead row is defined as front-rear direction, the width direction of low-voltage wire lead row is defined as
Left and right directions, the lead fixed structure include that corresponding front-rear direction is arranged in low-voltage wire lead row two sides and by being fixedly connected
The fastening of structural clamp is assemblied in two clamping units on low-voltage wire lead row, each clamping unit be respectively provided in the longitudinal direction with
The unidirectional clamping side of low-voltage wire lead row press cooperation, each clamping unit also have in the side towards two clamping unit relative inners
The block boss of the unidirectional clamping side arrangement of the clamping unit protruding upward, two block boss correspondence are arranged in low-voltage wire lead row
The left and right sides, each block boss are respectively provided with for the block in the lateral direction with the cooperation of low-voltage wire lead row corresponding side block
Face.
2. oil-immersed transformer according to claim 1, characterized in that the clamping unit is L-shaped clamping piece, described
Clamping piece has the horizontal edge extended along the longitudinal direction and the vertical edge extended in left-right direction, and the unidirectional clamping side is arranged in institute
It states on vertical edge, the horizontal edge constitutes the block boss.
3. oil-immersed transformer according to claim 2, characterized in that the clamping piece by polyamide material one at
Type.
4. oil-immersed transformer according to claim 2 or 3, characterized in that be equipped on the horizontal edge of each clamping piece along preceding
The perforative horizontal edge mounting hole of rear direction, is respectively provided on the vertical edge of each clamping piece and the horizontal edge on another clamping piece horizontal edge is pacified
The corresponding vertical edge mounting hole in hole is filled, the vertical edge mounting hole is the long hole extended in left-right direction, the fixed connection structure packet
The vertical edge mounting hole, the horizontal edge mounting hole and correspondence is included to be installed in the horizontal edge mounting hole and the vertical edge mounting hole
Fastening bolt.
5. oil-immersed transformer according to claim 4, characterized in that the upper clamping piece is channel steel, at the notch of channel steel
It is fixed with reinforcing rib, the reinforcing rib is equipped with corresponding so that the fastening bolt passes through with vertical edge mounting hole, horizontal edge mounting hole
And then two clamping pieces are fixed on to the upper clamping piece mounting hole on upper clamping piece.
6. oil-immersed transformer according to claim 2 or 3, characterized in that the thickness of the vertical edge in the longitudinal direction
Greater than the thickness of the block boss in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534098.3A CN109473264B (en) | 2018-12-14 | 2018-12-14 | Oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534098.3A CN109473264B (en) | 2018-12-14 | 2018-12-14 | Oil-immersed transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109473264A true CN109473264A (en) | 2019-03-15 |
| CN109473264B CN109473264B (en) | 2021-02-19 |
Family
ID=65675182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811534098.3A Active CN109473264B (en) | 2018-12-14 | 2018-12-14 | Oil-immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109473264B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110198020A (en) * | 2019-05-24 | 2019-09-03 | 国家电网有限公司 | Pipe bus-bar T-shaped connection gold utensil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203733591U (en) * | 2014-03-19 | 2014-07-23 | 中骏电气（泉州）有限公司 | Novel low-pressure foil coil winding oil-immersed transformer |
| CN104123883A (en) * | 2014-06-25 | 2014-10-29 | 国家电网公司 | Pluggable type pole and tower running number plate |
| CN206412642U (en) * | 2017-02-06 | 2017-08-15 | 广州市晟科电气科技有限公司 | It is a kind of to be used for the bracket of electric cabinet busbar |
-
2018
- 2018-12-14 CN CN201811534098.3A patent/CN109473264B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203733591U (en) * | 2014-03-19 | 2014-07-23 | 中骏电气（泉州）有限公司 | Novel low-pressure foil coil winding oil-immersed transformer |
| CN104123883A (en) * | 2014-06-25 | 2014-10-29 | 国家电网公司 | Pluggable type pole and tower running number plate |
| CN206412642U (en) * | 2017-02-06 | 2017-08-15 | 广州市晟科电气科技有限公司 | It is a kind of to be used for the bracket of electric cabinet busbar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110198020A (en) * | 2019-05-24 | 2019-09-03 | 国家电网有限公司 | Pipe bus-bar T-shaped connection gold utensil |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109473264B (en) | 2021-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109473264A (en) | A kind of oil-immersed transformer | |
| CN207425571U (en) | A kind of transformer core clamp assembly, transformer core and transformer | |
| CN201590307U (en) | Integral iron reactor core | |
| CN203351346U (en) | Transformer core for single-phase direct-current magnetic bias experiments | |
| CN205230750U (en) | Oil -immersed transformer's iron core | |
| CN212750579U (en) | Transformer silicon steel iron core clamp | |
| CN204215877U (en) | A kind of apparatus for fixing transformer | |
| CN212411815U (en) | Transformer body structure for enhancing short-circuit resistance of transformer | |
| CN210156873U (en) | Wedge-shaped strain clamp | |
| CN204992568U (en) | Low -voltage arc suppressing coil | |
| CN202871490U (en) | Iron core reactor and magnetic circuit clamping device thereof | |
| CN202333169U (en) | Energy-saving wire clamp for single-hole flat plate | |
| CN218525420U (en) | Reactor iron core and reactor device | |
| CN101477877B (en) | Electric transformer winding and iron core fixing device | |
| CN210925676U (en) | Double-sided square frame type fastener for assembling iron core reactor | |
| CN201352483Y (en) | Epoxy resin insulating series reactor | |
| CN213400816U (en) | Iron core lamination clamping structure | |
| CN114373610B (en) | Low-voltage series reactor | |
| CN207251367U (en) | Modified low voltage motor outgoing line busbar fixed structure | |
| CN210984485U (en) | Backing plate device between dry-type transformer stretching strap iron cores | |
| CN204632534U (en) | A kind of pulling plate structure of three-dimensional wound core dry type transformer core clamping and iron core thereof | |
| CN211319907U (en) | Transformer core clamp | |
| CN210272036U (en) | Transformer winding clamping device | |
| CN204257347U (en) | Dry-type transformer iron core clamping device | |
| CN215527958U (en) | Grounding device of electrical secondary equipment convenient to install |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |