CN108109811A - A kind of low-loss dry-type transformer - Google Patents

A kind of low-loss dry-type transformer Download PDF

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Publication number
CN108109811A
CN108109811A CN201810019457.5A CN201810019457A CN108109811A CN 108109811 A CN108109811 A CN 108109811A CN 201810019457 A CN201810019457 A CN 201810019457A CN 108109811 A CN108109811 A CN 108109811A
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CN
China
Prior art keywords
coil
low
cover body
type transformer
clamping piece
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Granted
Application number
CN201810019457.5A
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Chinese (zh)
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CN108109811B (en
Inventor
段现英
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Chenghe Electric Power Technology Group Co., Ltd
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Quzhou Feng Fan Science And Technology Co Ltd
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Priority to CN201810019457.5A priority Critical patent/CN108109811B/en
Publication of CN108109811A publication Critical patent/CN108109811A/en
Application granted granted Critical
Publication of CN108109811B publication Critical patent/CN108109811B/en
Active legal-status Critical Current
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    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields
    • 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
    • H01F27/02—Casings
    • 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
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling
    • 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
    • H01F27/08—Cooling; Ventilating
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • 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
    • H01F27/2876—Cooling
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • 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
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F2027/348—Preventing eddy currents

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Transformer Cooling (AREA)

Abstract

A kind of low-loss dry-type transformer, including iron core, coil, folder etc., coil includes low-voltage coil and high-tension coil, and iron core is by upper yoke, lower yoke, upper clamping piece, lower clamping piece, other screw rod, pulling plate composition are provided with multiple spills heat dissipation notches by corresponding to coil position on upper clamping piece；And get through coil inside vent passages using combed stay；Transformer is made to have further included the dust-proof cover body of external ventilation, cover body is divided into top plate, center section and bottom plate, cover body center section is provided with multiple air-intake windows, the air-intake window is provided with multistorey strainer mesh structure, automatic Dou Chen mechanisms are provided in multistorey strainer mesh structure, to realize reduction transformer loss, promotion transformer dust control by ventilation performance, effectively facilitate energy saving effect.

Description

A kind of low-loss dry-type transformer
Technical field
The invention belongs to field of electrical equipment, and in particular to a kind of low-loss dry type transformer structure body.
Background technology
Transformer is the device for changing alternating voltage using the principle of electromagnetic induction, due to being power equipment, transformer During operation, the electric energy loss in winding and iron core can generate heat, and transformer is caused to overheat, if heat dissipates away not in time, Trigger electric power system fault it will cause transformer insulated damage or even cause the security incidents such as fire.
Meanwhile when transformer iron core loss is excessive, transformer fever is serious, and vibrations are excessive, from transformer device structure, Core structure is fastened, reducing leakage field equally can reduce loss.
Existing dry-type transformer babinet relies primarily on fan and carries out forced air cooling, in order to maintain the circulation of air, it is necessary in cabinet Air inlet hole is opened up on body, external dust is easy to enter in cabinet by air inlet hole, and the in vivo electronic component of cabinet is caused brokenly It is bad；Meanwhile western China electric power resource is enriched and had and largely has more than needed, but west area dust storm content is higher, if only Simply using Air Filter or using in the prior art be used for general environment transformer-cabinet, substantial amounts of dust easily block into Air holes Air Filter, makes cool exterior air cannot be introduced into inside transformer case, and transformer will be damaged because temperature is excessively high, be made whole A equipment is stopped.
The content of the invention
To solve the above-mentioned problems, the present invention discloses a kind of low-loss dry-type transformer, the low-loss dry-type transformer, knot Structure is compact, core loss is low, and using the form of ventilating and cooling cover body, without oil immersion, ventilating and cooling cover body can take into account ventilation Heat dissipation and dust reduction capability are relatively suitable for dust storm compared with overall situation, automatically and efficiently reduce transformer temperature, improve transformer safety Property.
The technical problems to be solved by the invention are realized using following technical scheme：
A kind of low-loss dry-type transformer, includes iron core, coil, folder, cushion block, nail pressing, pedestal, and coil includes low Crimping circle and high-tension coil, iron core is by upper yoke, lower yoke, upper clamping piece, lower clamping piece, core through screw rod, pulling plate composition, wherein upper iron Yoke is sequentially connected upper clamping piece and upper cushion block, and lower yoke is sequentially connected lower clamping piece and lower cushion block, and core through screw rod is upper and lower through high-low pressure Folder, upper cushion block are pressed on by nail pressing on coil, and pulling plate is connected respectively with the upper yoke of iron core and lower yoke, and feature exists In：Coil position is corresponded on the upper clamping piece and is provided with multiple spill heat dissipation notches；It is dust-proof that transformer has further included external ventilation Cover body, cover body are divided into top plate, center section and bottom plate, and cover body center section is provided with multistorey strainer mesh structure, multistorey strainer mesh structure On be provided with automatic Dou Chen mechanisms.
The iron core and coil according to iron core, interior insulation cylinder, high-tension coil, external insulation cylinder, low-voltage coil order successively Arrangement, wherein being respectively fixed with interior combed stay and outer combed stay on the interior insulation cylinder and the external insulation cylinder.
Stay end is polished into nearly fillet.
The dust control by ventilation cover body top plate is arranged to humanoid, humanoid top plate include intermediate width portion, two inclined portion and Top rain cover portion.
Several exhausting holes are opened up in the width portion, high-power exhaust blower is equipped in hole, is set in two inclined portion There is solar energy receiving module, the rain cover portion is arranged at the width portion by the they sup-port being arranged in the width portion On, for preventing rainwater and dust from entering by exhausting hole inside cover body.
The dust control by ventilation cover body center section is arranged to four sides double-layer structure, wherein being both provided with multiple air inlets on each face Window, each air-intake window whole S-type construction in double layer structure.
The S types construction window middle and lower part port is provided outside shutter, and multistorey strainer mesh structure is provided in upper through-ports.
The multistorey strainer mesh be divided into it is outer, in, interior three layers of filter structure, the filter eye of outer leaching net layer is in cellular, Inner filter net layer Filter eye is in the lattice-shaped that intersects anyhow, and middle filter mesh layer is irregular net structure, middle filter mesh layer be filled in outer leaching net layer with it is interior Between filter mesh layer, and make outer leaching net layer and middle filter mesh layer and Inner filter net layer is welded into a whole structure.
Bottom corresponding with strainer corresponding portion is hollow knot in the internal layer cover body of the dust control by ventilation cover body center section Structure, the automatic Dou Chen mechanisms include an insulation wire body, and described insulation wire body one end is buckled in the screen surface, other end button It is located on the hole being opened on apparatus for fixing transformer.
The insulation wire body is divided into two parts by intermediate oblate fixed part, and wherein one side is divided into more separated time bodies, point Wire body quantity and air-intake window or strainer set quantity to correspond to, and one end that opposite side is connected with folder is an independent total wire body.
Oblate fixed part is attracted body for a pair of magnetic, wherein the fixed part being connected with more separated time bodies is metal material, and The fixed part being connected with total wire body is the ferrite material of coil winding.
Compared with prior art, the present invention it has the following advantages and advantages：
（1）Crosswise magnetic cut-off slot mouth is provided on pulling plate, can more separate leakage field than wall scroll shape notch, effectively reduce eddy-current loss；
（3）Iron core and coil are arranged in order according to the order of iron core, interior insulation cylinder, high-tension coil, external insulation cylinder, low-voltage coil, Interior combed stay and outer combed stay, and stay end are respectively fixed on wherein described interior insulation cylinder and the external insulation cylinder Nearly fillet is polished into, so set, further getting through the heat dissipation channel between coil case, while is provided on upper clamping piece multiple recessed Shape heat dissipation notch so that folder no longer influences iron-core coil longitudinally upper heat dissipation channel, and other venting practices is coordinated to imitate ventilation Fruit greatly promotes；
（4）Its top plate design of the dust-proof cover body of external ventilation is unique, and while stopping that external rainwater enters, air draft passage is smooth, Make exhaust effect good using stack effect, and can rationally utilize solar energy, and intermediate air inlet effect is good, meanwhile, in northwester Under husky larger environment, the influence of dust storm can be effectively reduced.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is transformer body structure diagram of the present invention；
Fig. 2 is transformer body top view of the present invention；
Fig. 3 is the dust-proof cover body schematic diagram of external ventilation of the present invention；
Fig. 4 is the dust-proof cover body center section schematic diagram of external ventilation of the present invention
Mark and corresponding parts title in attached drawing：
1- upper clamping pieces, 2 lower clamping pieces, 3 pulling plates, 4 coils, 41- high-tension coils, 42- low-voltage coils, 5 iron cores, 6 heat dissipation notches, 7 is logical The dust-proof cover body top plate of wind, 71 top rain cover portions, 72 supporting rods, 73 exhausting holes, 74 liang of inclined portion, among 8 dust control by ventilation cover bodies Part, 9 air-intake windows, 91 strainers, 92 lower through-ports, 93 hollow structures, 94 oblate fixed parts, 941 separated time bodies, 942 total wire bodies.
Specific embodiment
A kind of low-loss dry-type transformer includes iron core 5, coil 4, folder, cushion block, nail pressing, pedestal, coil Including low-voltage coil 41 and high-tension coil 42, iron core is by upper yoke, lower yoke, upper clamping piece 1, lower clamping piece 2, other screw rod, 3 groups of pulling plate Into wherein upper yoke is sequentially connected upper clamping piece 1 and upper cushion block, and lower yoke is sequentially connected lower clamping piece 2 and lower cushion block, and other screw rod passes through Be horizontally through upper and lower folder respectively, upper cushion block is pressed on by nail pressing on coil, pulling plate 3 respectively with the upper yoke of iron core and Lower yoke connects, and pulling plate 3 is the iron-core draw-board body being formed from steel, and is equipped with hole in iron-core draw-board body；Transformer further includes There is the dust-proof cover body of external ventilation, cover body is divided into top plate 7, center section 8 and bottom plate, and cover body center section 8 is provided with multiple air inlets Window 9, the air-intake window 9 are provided with multistorey strainer mesh structure 91, automatic Dou Chen mechanisms are provided in the multistorey strainer mesh structure.
Wherein pulling plate 3 is the iron-core draw-board body that is formed from steel, and iron-core draw-board body be equipped with along its length and across The slot hole of direction extension is spent, the long hole shape of both direction becomes crosswise, and the slot hole of crosswise can effectively separate leakage path, subtract Small eddy-current loss, while reduce the material cost of iron-core draw-board body.
Iron core 5 and coil 4 according to iron core 5, interior insulation cylinder, high-tension coil 41, external insulation cylinder, low-voltage coil 42 order according to Interior dressing stay and outer dressing stay, and dressing stay are respectively fixed in secondary arrangement, wherein interior insulation cylinder and external insulation cylinder End be nearly fillet.The configuration of dressing stay and insulating cylinder makes coil inside and outside be each formed with air passage, inside air passage cooperation External ventilation structure can be such that the temperature in transformer core and coil is effectively distributed.And stay end is set for nearly fillet, Its end wear can be reduced.
Transformer has further included the dust-proof cover body of external ventilation, and cover body is divided into top plate 7, center section 8 and bottom plate, and top plate is to set It is set to humanoid, humanoid top plate includes intermediate width portion, two inclined portion 74 and top rain cover portion 71, opens up in width portion several Exhausting hole 73 is equipped with high-power exhaust blower in hole, is provided with solar energy receiving module in two inclined portion 74, rain cover portion 71 passes through The support of supporting rod 72 being arranged in width portion is arranged in width portion, for preventing rainwater and dust from entering cover by exhausting hole Internal portion.Humanoid top plate is conducive to that rainwater is quickly arranged down to, prevented ponding, and can play gear of becalming to the center section 8 of lower section The protective effect of rain, the solar structure module set on top plate 7, can efficiently use solar energy, charge for accumulator, be cabinet Interior power supply for electrical equipment, energy conservation and environmental protection.
Cover body center section 8 is arranged to four sides double-layer structure, wherein being both provided with multiple air-intake windows, Mei Gejin on each face Air regulator mouth whole S-type construction, S type windows its underpart port 92 in double layer structure are provided outside shutter, upper through-ports Multistorey strainer mesh structure 91 is inside provided with, by the way that shutter, S types construct, multistorey strainer mesh structure can be effectively kept out under particular surroundings Sand and dust, dry-type transformer overall operation efficiency is high.
Wherein, multistorey strainer mesh 91 divide for it is outer, in, interior three layers of filter structure, the filter eye of outer leaching net layer is in cellular；Inner filter net Layer filter eye is in the lattice-shaped that intersects anyhow, and middle filter mesh layer is irregular net structure, middle filter mesh layer be filled in outer leaching net layer with Between Inner filter net layer, and make outer leaching net layer and middle filter mesh layer and Inner filter net layer is welded into a whole structure.
However, either power generation, power transformation or power distribution transformer is unattended transformer, the transformation of long-time service Device, because blocking a large amount of dusts in dustproof filter screen, ventilation effect substantially reduces, and transformer temperature is high, and loss is big.
Therefore, cover body center section 8 is arranged to double-layer structure, at this point, its in certain thickness internal layer cover body with The corresponding bottom corresponding portion of strainer is designed as hollow structure 93, and strainer 91 can accordingly be fixed integrally to the top of internal layer cover body Part, meanwhile, 91 surface of strainer is buckled in using wire body one end of insulating, the other end be located in the hole being opened on apparatus for fixing transformer On, thus ash of the absorption in screen surface is shaken off in vibrations when being run by transformer body, the slight vibrations with electric filter Dirt, and drop via hollow structure 93.Bottom position corresponding with hollow structure is provided with the collection ash of drawer-like in internal layer cover body Slot.
Insulation wire body is divided into two parts by intermediate oblate fixed part 94, and wherein one side is divided into more separated time bodies 941, Middle separated time body quantity and air-intake window or strainer set quantity to correspond to, and one end of opposite side folder connection is an independent total wire body 942。
Oblate fixed part 94 can be that a pair of magnetic is attracted body, and oblate fixed part 94 is placed at the in vivo branch of cover It supports on platform；The fixed part being wherein connected with more separated time bodies 941 is metal material, and the fixed part being connected with total wire body 942 For the ferrite material of coil winding, coil-end is connected to the power supply unit that solar energy is provided, electricity is provided for coil by power supply unit Stream, and magnetic, actuation metal, the connection of completion strainer and apparatus for fixing transformer are generated by hot-wire coil excitation ferrite.It is it is preferred that real Apply in example, in hot-wire coil circuit access such as time relay controller, with control the energization opportunity of hot-wire coil, energization when It is long, to complete the connection of insulation wire body.

Claims (10)

1. a kind of low-loss dry-type transformer, includes iron core, coil, folder, cushion block, nail pressing, pedestal, coil includes Low-voltage coil and high-tension coil, iron core are made of upper yoke, lower yoke, upper clamping piece, lower clamping piece, core through screw rod, pulling plate, wherein on Iron yoke is sequentially connected upper clamping piece and upper cushion block, and lower yoke is sequentially connected lower clamping piece and lower cushion block, core through screw rod through on high-low pressure, Lower clamping piece, upper cushion block are pressed on by nail pressing on coil, and pulling plate is connected respectively with the upper yoke of iron core and lower yoke, feature It is：Coil position is corresponded on the upper clamping piece and is provided with multiple spill heat dissipation notches；Transformer, which has further included external ventilation, to be prevented Dust hood body, cover body are divided into top plate, center section and bottom plate, and cover body center section is provided with multistorey strainer mesh structure, multistorey strainer mesh knot Automatic Dou Chen mechanisms are provided on structure.
2. low-loss dry-type transformer according to claim 1, it is characterised in that：The iron core and coil according to iron core, Interior insulation cylinder, high-tension coil, external insulation cylinder, the order of low-voltage coil are arranged in order, wherein the interior insulation cylinder and it is described it is outer absolutely Interior combed stay and outer combed stay are respectively fixed on edge cylinder, and stay end is polished into nearly fillet.
3. low-loss dry-type transformer according to claim 1, it is characterised in that：The dust control by ventilation cover body top plate is set To be humanoid, humanoid top plate includes intermediate width portion, two inclined portion and top rain cover portion.
4. low-loss dry-type transformer according to claim 3, it is characterised in that：Several exhausting are opened up in the width portion Hole is equipped with high-power exhaust blower in hole, is provided with solar energy receiving module in two inclined portion, the rain cover portion is by setting The they sup-port in the width portion is put to be arranged in the width portion, for prevent rainwater and dust by exhausting hole into Enter inside cover body.
5. low-loss dry-type transformer according to claim 1, it is characterised in that：The dust control by ventilation cover body center section Four sides double-layer structure is arranged to, wherein being both provided with multiple air-intake windows on each face, each air-intake window is in double layer structure Whole S-type construction.
6. low-loss dry-type transformer according to claim 5, it is characterised in that：The S types construction window middle and lower part leads to Mouth is provided outside shutter, and multistorey strainer mesh structure is provided in upper through-ports.
7. low-loss dry-type transformer according to claim 1, it is characterised in that：The multistorey strainer mesh be divided into it is outer, in, it is interior Three layers of filter structure, the filter eye of outer leaching net layer is in cellular, and Inner filter net layer filter eye is in the lattice-shaped intersected anyhow, and middle filter mesh layer is Irregular net structure, middle filter mesh layer are filled between outer leaching net layer and Inner filter net layer, and make outer leaching net layer and middle filter mesh layer And Inner filter net layer is welded into a whole structure.
8. low-loss dry-type transformer according to claim 5, it is characterised in that：The dust control by ventilation cover body center section Internal layer cover body in bottom corresponding with strainer corresponding portion be hollow structure, the automatic Dou Chen mechanisms include an insulated wire Body, described insulation wire body one end are buckled in the screen surface, and the other end be located on the hole being opened on apparatus for fixing transformer.
9. low-loss dry-type transformer according to claim 8, it is characterised in that：The insulation wire body passes through intermediate oblate Fixed part and be divided into two parts, wherein one side is divided into more separated time bodies, separated time body quantity and air-intake window or strainer and sets quantity Corresponding, one end that opposite side is connected with folder is an independent total wire body.
10. low-loss dry-type transformer according to claim 8, it is characterised in that：Oblate fixed part is inhaled for a pair of magnetic Zoarium, wherein the fixed part being connected with more separated time bodies is metal material, and the fixed part being connected with total wire body winds for coil Ferrite material.
CN201810019457.5A 2018-01-09 2018-01-09 Low-loss dry-type transformer Active CN108109811B (en)

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CN108109811B CN108109811B (en) 2020-04-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021058764A1 (en) * 2019-09-26 2021-04-01 Abb Power Grids Switzerland Ag Transformers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009171833A (en) * 2007-12-18 2009-07-30 Hitachi Ltd Switchgear
CN105390256A (en) * 2015-11-05 2016-03-09 苏州腾冉电气设备股份有限公司 Leakage transformer
CN106329335A (en) * 2016-11-14 2017-01-11 仲炳华 Dustproof electric cabinet
CN206340412U (en) * 2016-12-26 2017-07-18 重庆九能控股有限公司 A kind of environmental protection silent dry-type transformer
CN206575068U (en) * 2017-01-20 2017-10-20 国网安徽省电力公司太湖县供电公司 A kind of power engineering box-type substation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009171833A (en) * 2007-12-18 2009-07-30 Hitachi Ltd Switchgear
CN105390256A (en) * 2015-11-05 2016-03-09 苏州腾冉电气设备股份有限公司 Leakage transformer
CN106329335A (en) * 2016-11-14 2017-01-11 仲炳华 Dustproof electric cabinet
CN206340412U (en) * 2016-12-26 2017-07-18 重庆九能控股有限公司 A kind of environmental protection silent dry-type transformer
CN206575068U (en) * 2017-01-20 2017-10-20 国网安徽省电力公司太湖县供电公司 A kind of power engineering box-type substation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021058764A1 (en) * 2019-09-26 2021-04-01 Abb Power Grids Switzerland Ag Transformers
US11742128B2 (en) 2019-09-26 2023-08-29 Hitachi Energy Switzerland Ag Transformers

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Patentee after: Chenghe Electric Power Technology Group Co., Ltd

Address before: 325600 No. 238, wei16 Road, Yueqing Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province (within Zhilin Power Equipment Co., Ltd.)

Patentee before: Chenghe Electric Power Technology Co.,Ltd.

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