CN109087779B - Permanent magnet on-load voltage-regulating tapping switch equipment of transformer - Google Patents
Permanent magnet on-load voltage-regulating tapping switch equipment of transformer Download PDFInfo
- Publication number
- CN109087779B CN109087779B CN201810791987.1A CN201810791987A CN109087779B CN 109087779 B CN109087779 B CN 109087779B CN 201810791987 A CN201810791987 A CN 201810791987A CN 109087779 B CN109087779 B CN 109087779B
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- voltage
- oil tank
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- cover plate
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 32
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 10
- 229920002943 EPDM rubber Polymers 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 4
- 239000004416 thermosoftening plastic Substances 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- 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
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
-
- 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
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- 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
- H01F27/40—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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
- H01F27/402—Association of measuring or protective means
- H01F2027/404—Protective devices specially adapted for fluid filled transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a permanent magnet on-load voltage-regulating tapping switch device of a transformer, which comprises a cover plate and an oil tank, wherein the oil tank is connected to the lower part of the cover plate, a lead terminal board is arranged at the bottom of the oil tank, a tapping switch body connected with the cover plate is arranged in the oil tank, a plurality of high-voltage bushings are connected to the upper part of the cover plate, high-voltage leads penetrate through the high-voltage bushings, and one ends of the high-voltage leads penetrating through the high-voltage bushings are connected with the lead terminal board; the wiring terminal on the tapping switch body is connected with the lead terminal board; the transformer is characterized in that the transformer is provided with a transformer box body, a coil, an iron core and a vacuum on-load voltage regulating tap switch, wherein the coil and the iron core are arranged on the transformer box body, the coil and the iron core are connected with the transformer, and the transformer is connected with the transformer.
Description
Technical Field
The invention is suitable for the field of electrical equipment, and particularly relates to permanent magnet on-load voltage-regulating tapping switch equipment of a transformer.
Background
In the running process of the distribution transformer, the output voltage of the transformer is fluctuated due to the time-period and seasonal changes of the power load, and the output voltage exceeds the normal use voltage range of the electrical equipment, so that the normal use and the service life of the electrical equipment are affected. The existing tap changers for regulating voltage of distribution transformers mostly adopt the no-load tap changers shown in fig. 9 and 10, the power supply of the transformers is required to be cut off during voltage regulation, manual voltage regulation is performed, power supply continuity is affected, and the defects of large workload, incapability of timely regulation and the like exist. The on-load voltage-regulating tapping switch can ensure that the voltage output is in a qualified range under the condition of continuous power failure, and improves the power supply quality and stability.
There are also on-load tap changers of distribution transformers produced by a plurality of manufacturers in China, and the on-load tap changers are various in form, but can only be applied to newly manufactured transformers, and the existing on-load distribution transformers cannot be modified.
Disclosure of Invention
Aiming at the defects, the invention provides the permanent magnet on-load voltage-regulating tapping switch equipment of the transformer, which can conveniently realize the transformation of the original transformer without changing the original transformer body, can realize the on-load voltage regulation of the distribution transformer by only adding the on-load voltage-regulating tapping switch part outside, and solves the defect that the original off-load voltage-regulating distribution transformer cannot regulate voltage in real time according to voltage change.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
The utility model provides a permanent magnetism on-load voltage regulation tapping switch equipment of transformer, includes the oil tank that is equipped with the oil medium, the bottom of oil tank is provided with locking mechanism, locking mechanism is interior to be locked and is installed sealing washer and lead terminal board, install the voltage regulation tapping switch who is connected with lead terminal board electricity in the oil tank, the oil tank top is provided with the apron, the vertical high-voltage bushing that installs of apron upper surface, wear to be equipped with high-voltage lead in the high-voltage bushing, high-voltage lead runs through apron and oil tank bottom in proper order and is connected with lead terminal board electricity, voltage regulation tapping switch is connected with lead terminal board electricity.
Preferably, the high-voltage sleeve and the lead terminal board are respectively provided with three, and the high-voltage sleeve and the lead terminal board are arranged in a one-to-one correspondence manner.
Preferably, the locking mechanism comprises a pressing plate and a first screw, one end of the first screw penetrates through the pressing plate and is connected to the bottom of the oil tank, a containing cavity is formed in the bottom of the pressing plate and the bottom of the oil tank, the lead terminal plate is arranged in the containing cavity, the sealing ring is arranged between the lead terminal plate and the bottom of the oil tank, and the first screw is adjusted to enable the pressing plate to be locked and fixed with the lead terminal plate.
Preferably, the lower surface of the cover plate is in threaded connection with four No. two screws, and the voltage-regulating tapping switch is connected to the lower surface of the cover plate through the four No. two screws; the upper portion of the cover plate is provided with a plurality of third screws for fixing the high-voltage sleeve, and the high-voltage sleeve is provided with a pressing block.
Preferably, a sealing strip is arranged at the joint of the cover plate and the oil tank, and the sealing strip is a thermoplastic ethylene propylene diene monomer rubber sealing strip.
Preferably, the sealing ring is O-shaped.
Preferably, a temperature sensor is arranged in the oil tank, the temperature sensor is connected with a display, and the density of oil in the oil tank is not more than 0.85kg/m 3.
Preferably, the cover plate is provided with a plurality of oil holes.
The beneficial effects are that: the invention does not damage the original transformer box body, the coil and the iron core, only takes down the original transformer box cover, changes the vacuum on-load voltage-regulating tapping switch with the structure of the invention, and can finish the improvement of on-load voltage regulation of the original transformer by connecting the transformer with the lead of the tapping switch, thereby being convenient and reliable to install and being finished on the power distribution site. The number of the existing non-excitation distribution transformers is huge, and the on-load voltage regulating function is urgently needed to be added in most of the using areas, so that the market prospect is very large.
Drawings
Fig. 1 is a front view of a vacuum load switch of the present invention.
Fig. 2 is a left side view of the vacuum load switch of the present invention.
Fig. 3 is a top view of the vacuum load switch of the present invention.
Fig. 4 is an enlarged partial view of the left side view a of the present invention.
Fig. 5 is a schematic view of the fuel tank of the present invention.
Fig. 6 is a schematic view of a cover plate of the present invention.
Fig. 7 is a front view of the transformer of the present invention after retrofitting.
Fig. 8 is a rear side perspective view of a transformer retrofit of the present invention.
Fig. 9 is a front view of the original transformer.
Fig. 10 is a side perspective view of the original transformer.
In the figure, 1, an oil tank, 2, a cover plate, 3, a high-voltage sleeve, 4, a high-voltage lead, 5, a sealing strip, 6, a voltage-regulating tapping switch, 7, a sealing ring, 8, a lead terminal plate, 9, a pressing plate, 11, a first bolt, 13, a second bolt, 12, a third bolt, 101, a transformer, 105, a low-voltage sleeve, 106, a low-voltage lead, 108 and a transformer coil.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples.
The invention relates to a permanent magnet on-load voltage-regulating tapping switch device of a transformer, which is shown in figures 1-8, and comprises an oil tank 1 filled with an oil medium, wherein a locking mechanism is arranged at the bottom of the oil tank 1, a sealing ring 7 and a lead terminal plate 8 are arranged in the locking mechanism in a locking manner, a voltage-regulating tapping switch 6 electrically connected with the lead terminal plate 8 is arranged in the oil tank 1, a cover plate 2 is arranged at the top of the oil tank 1, a high-voltage sleeve 3 is vertically arranged on the upper surface of the cover plate 2, a high-voltage lead 4 penetrates through the high-voltage sleeve 3 and sequentially penetrates through the cover plate 2 and the bottom of the oil tank 1, and is electrically connected with the lead terminal plate 8, and the voltage-regulating tapping switch 6 is electrically connected with the lead terminal plate 8.
The permanent magnet on-load voltage-regulating tapping switch equipment of the transformer changes the non-load distribution transformer 101 shown in fig. 9 and 10 into the transformer with no power failure, ensures the voltage output within a qualified range, and improves the quality and stability of power supply. The invention removes the transformer cover plate on the original no-load distribution transformer, hangs the iron core, installs the permanent magnet load voltage-regulating tapping switch on the upper part, keeps the low-voltage sleeve 106 and the low-voltage lead 105 unchanged, and leads the high-voltage tap line to the lead terminal board 8 at the bottom of the voltage-regulating tapping switch 6, thus realizing the refitting. In order to replace the existing load-free voltage regulating switch with different sizes with the load-free voltage regulating switch shown in fig. 7 and 8, the bottom plate of the oil tank 1 is designed according to the original transformer size which is modified as required, and the sizes of the cover plate 2 and the oil tank 1 are ensured to be matched with the transformer body. The on-load voltage-regulating tapping switch comprises a cover plate 2 and an oil tank 1 which is connected to the bottom of the cover plate 2 and is filled with oil medium, wherein a locking mechanism at the bottom of the oil tank 1 is used for locking a lead terminal plate 8 and simultaneously compacting an O-shaped sealing ring 7. The cover plate 2 is provided with the high-voltage sleeve 3, the high-voltage sleeve 3 is used for penetrating the high-voltage lead 4, the high-voltage lead 4 penetrates through the cover plate 2 and the oil tank 1 and then is electrically connected with the lead terminal plate 8, the high-voltage sleeve 3 and the lead terminal plate 8 are respectively provided with three, and the high-voltage sleeve 3 and the lead terminal plate 8 are arranged in an up-down one-to-one correspondence mode. The terminals of the tap changer 6 are also connected to a lead terminal plate 8. The sealing ring 7 is arranged at the position where the high-voltage lead 4 penetrates through the oil tank 1. The voltage regulating tapping switch 6 adopts a 'JVSZT' permanent magnet vacuum on-load voltage regulating tapping switch of an epoch electric group, the voltage fluctuation is small during voltage regulating switching, the normal use of electric equipment is not affected, and the vacuum arc extinguishing structure is adopted during the contact switching of the tapping switch, the performance is reliable, and the transformer oil is not polluted.
As a further optimization, the locking mechanism comprises a pressing plate 9 for bearing the lead terminal plate 8, a first screw rod 11 for connecting the pressing plate 9 with the oil tank 1, one end of the first screw rod 11 penetrates through the pressing plate 9 and is connected to the bottom of the oil tank 1, a containing cavity is formed in the bottoms of the pressing plate 9 and the oil tank 1, the lead terminal plate 8 is arranged in the containing cavity, the sealing ring 7 is arranged between the lead terminal plate 8 and the bottom of the oil tank 1, and the first screw rod 11 is adjusted to enable the pressing plate 9 to lock and fix the lead terminal plate 8, and meanwhile the sealing ring 7 is pressed tightly.
As further optimization, the lower surface of the cover plate 2 is in threaded connection with four No. two screws 13, and the voltage-regulating tapping switch 6 is hoisted on the lower surface of the cover plate 2 through the four No. two screws 13; the upper portion of the cover plate 2 is provided with a plurality of third screw rods 12 for fixing the high-voltage bushings 3, three third screw rods 12 are arranged around each high-voltage bushing 3, and the high-voltage bushings 3 are further provided with special pressing blocks for fixing the high-voltage bushings 3.
As further optimization, the joint of the cover plate 2 and the oil tank 1 is provided with a sealing strip 5, the sealing strip is a thermoplastic ethylene propylene diene monomer rubber sealing strip, and the thermoplastic ethylene propylene diene monomer rubber sealing strip has the advantages of seepage prevention, leakage prevention, corrosion resistance, aging resistance, high and low temperature resistance and the like, and meets the requirements of the invention.
As a further optimization, a temperature sensor is arranged in the oil tank 1, the temperature sensor is connected with a display, and the density of oil in the oil tank 1 is not more than 0.85kg/m 3. The temperature sensor is used for detecting the temperature of oil in the oil tank 1 during working, the accident is avoided through the reaction temperature of the display screen, and meanwhile, the density of the oil is controlled to be not more than 0.85kg/m 3, so that produced water or other magazines can be naturally precipitated, and the working environment of the voltage-regulating tapping switch 6 is not influenced.
As a further optimization, the cover plate is provided with a plurality of oil filling holes for supplementing the oil medium.
The invention is characterized in that the invention can be used on a newly manufactured transformer, can be installed on a used unloaded distribution transformer, has simple installation process, can be operated on site of the transformer, and can be adapted only by changing the size of the bottom plate of the oil tank 1 according to the model of the transformer for the transformer without the model.
Finally, it should be noted that the invention is not limited to the above embodiments, but that many variants are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present invention.
Claims (6)
1. The utility model provides a permanent magnetism on-load voltage regulation tapping switch equipment of transformer which characterized in that: the oil tank comprises an oil tank (1) filled with an oil medium, a locking mechanism is arranged at the bottom of the oil tank (1), a sealing ring (7) and a lead terminal board (8) are installed in the locking mechanism in a locking mode, a voltage-regulating tapping switch (6) electrically connected with the lead terminal board (8) is installed in the oil tank (1), a cover plate (2) is arranged at the top of the oil tank (1), a high-voltage sleeve (3) is vertically installed on the upper surface of the cover plate (2), a high-voltage lead (4) is arranged in the high-voltage sleeve (3) in a penetrating mode, and the high-voltage lead (4) sequentially penetrates through the cover plate (2) and the bottom of the oil tank (1) and is electrically connected with the lead terminal board (8), and the voltage-regulating tapping switch (6) is electrically connected with the lead terminal board (8);
The locking mechanism comprises a pressing plate (9) and a first screw rod (11), one end of the first screw rod (11) penetrates through the pressing plate (9) and is connected to the bottom of the oil tank (1), a containing cavity is formed in the bottoms of the pressing plate (9) and the oil tank (1), the lead terminal plate (8) is arranged in the containing cavity, the sealing ring is arranged between the lead terminal plate (8) and the bottom of the oil tank (1), and the first screw rod (11) is adjusted to enable the pressing plate (9) to lock and fix the lead terminal plate (8);
The lower surface of the cover plate (2) is in threaded connection with four No. two screws (13), and the voltage-regulating tapping switch (6) is connected to the lower surface of the cover plate (2) through the four No. two screws (13); the upper portion of the cover plate (2) is provided with a plurality of third screw rods (12) to fix the high-voltage sleeve (3), and the high-voltage sleeve (3) is provided with a pressing block.
2. The permanent magnet on-load tap changer of a transformer of claim 1, wherein: the high-voltage bushing (3) and the lead terminal board (8) are respectively provided with three, and the high-voltage bushing (3) and the lead terminal board (8) are arranged in one-to-one correspondence.
3. The permanent magnet on-load tap changer of a transformer of claim 1, wherein: the sealing strip (5) is arranged at the joint of the cover plate (2) and the oil tank (1), and the sealing strip is a thermoplastic ethylene propylene diene monomer rubber sealing strip.
4. The permanent magnet on-load tap changer of a transformer of claim 1, wherein: the sealing ring is O-shaped.
5. The permanent magnet on-load tap changer of a transformer of claim 1, wherein: the oil tank (1) is internally provided with a temperature sensor, the temperature sensor is connected with a display, and the density of oil in the oil tank (1) is not more than 0.85kg/m 3.
6. The permanent magnet on-load tap changer of a transformer of claim 1, wherein: a plurality of oil holes are formed in the cover plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810791987.1A CN109087779B (en) | 2018-07-18 | 2018-07-18 | Permanent magnet on-load voltage-regulating tapping switch equipment of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810791987.1A CN109087779B (en) | 2018-07-18 | 2018-07-18 | Permanent magnet on-load voltage-regulating tapping switch equipment of transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109087779A CN109087779A (en) | 2018-12-25 |
| CN109087779B true CN109087779B (en) | 2024-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810791987.1A Active CN109087779B (en) | 2018-07-18 | 2018-07-18 | Permanent magnet on-load voltage-regulating tapping switch equipment of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109087779B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208690049U (en) * | 2018-07-18 | 2019-04-02 | 浙江纪元电气科技股份有限公司 | A kind of permanent magnetism on-load tap changer equipment of transformer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09162041A (en) * | 1995-12-05 | 1997-06-20 | Toshiba Corp | Gas-insulated transformer |
| CN100511947C (en) * | 2004-07-23 | 2009-07-08 | 东北农业大学 | Contactless on-load automatic regulating distribution transformer |
| CN101118803B (en) * | 2007-07-18 | 2010-11-17 | 李春光 | Distributing transformator electronic type loaded automatic wide region voltage regulating device |
| CN203659610U (en) * | 2014-01-22 | 2014-06-18 | 特变电工沈阳变压器集团有限公司 | External structure of detachable load switch |
| CN105405595A (en) * | 2015-11-18 | 2016-03-16 | 胡盛堂 | High-efficiency and energy-saving amorphous alloy transformer employing dry-type bushings led out for completely eradicating leakage |
| CN206134467U (en) * | 2016-06-28 | 2017-04-26 | 陕西四方华能电气设备有限公司 | Automatic on -load voltage regulation distribution transformer structure of broad width |
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2018
- 2018-07-18 CN CN201810791987.1A patent/CN109087779B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208690049U (en) * | 2018-07-18 | 2019-04-02 | 浙江纪元电气科技股份有限公司 | A kind of permanent magnetism on-load tap changer equipment of transformer |
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Effective date of registration: 20200813 Address after: No.39 Jiangbin Road, Jiangshan City, Quzhou City, Zhejiang Province Applicant after: Qiu Chenchen Address before: 324100 intersection Village intersection No. 198-4 of Qinghu Town, Jiangshan City, Quzhou, Zhejiang Applicant before: ZHEJIANG SINOERA ELECTRONICS TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20201127 Address after: No.2 Longshan Road, Qinghu street, Jiangshan City, Quzhou City, Zhejiang Province Applicant after: Juyuan intelligent electric (Zhejiang) Co.,Ltd. Address before: No.39 Jiangbin Road, Jiangshan City, Quzhou City, Zhejiang Province Applicant before: Qiu Chenchen |
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