CN110911090A - Disaster protection device for special transformer and installation method thereof - Google Patents
Disaster protection device for special transformer and installation method thereof Download PDFInfo
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- CN110911090A CN110911090A CN201911210487.5A CN201911210487A CN110911090A CN 110911090 A CN110911090 A CN 110911090A CN 201911210487 A CN201911210487 A CN 201911210487A CN 110911090 A CN110911090 A CN 110911090A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000009434 installation Methods 0.000 title abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000003139 buffering effect Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 230000017525 heat dissipation Effects 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims 6
- 230000005494 condensation Effects 0.000 claims 3
- 238000009833 condensation Methods 0.000 claims 3
- 230000001012 protector Effects 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- H01F27/02—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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- 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
- H01F27/10—Liquid cooling
- H01F27/16—Water cooling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a disaster protection device for a special transformer and an installation method thereof, wherein the disaster protection device comprises a base, the top of the base is fixedly connected with a transformer box, the bottom of the inner cavity of the transformer box is provided with a transformer element, two sides of the top of the base are provided with stress buffering mechanisms, and each stress buffering mechanism comprises a vertical plate, a first spring, a second spring, a movable plate, a connecting plate, a rotating shaft seat and a transverse plate; through setting up atress buffer gear, can receive external impact when this device, the impact is through first spring, the second spring, the cooperation of fly leaf and even board, thereby with outside impact maximum reduction, thereby the mounted position of having solved partial transformer is lower, receive external impact easily, if the transformer receives the striking of great dynamics, damage internals easily, influence the transformer and normally work, and the transformer can produce a large amount of heats for a long time work, if can not in time dispel the heat can cause the problem of circuit short circuit.
Description
Technical Field
The invention belongs to the field of transformer protection, and particularly relates to a disaster protection device for a special transformer and an installation method thereof.
Background
Besides the transformation of AC voltage, the transformer can be used for various purposes, such as changing the frequency of a power supply, a power supply of a rectifying device, a power supply of an electric welding device, a power supply of an electric furnace or being used as a voltage transformer, a current transformer and the like, the transformers with special purposes are generally called special transformers, because the working conditions and the load conditions of the transformers are different from those of the ordinary transformers, the calculation cannot be carried out by using the calculation method of the ordinary transformers, because the transformers are usually placed in the open air, the installation positions of partial transformers are lower and are easy to be impacted by external force, if the transformers are impacted by larger force, the internal parts are easy to be damaged, and the normal work of the transformers is influenced, moreover, the transformer can generate a large amount of heat after long-time working, and if the heat cannot be dissipated in time, a circuit short circuit can be caused, so that great inconvenience is brought to a user.
Disclosure of Invention
The invention aims to provide a disaster protection device for a special transformer and an installation method thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a disaster protection device for a special transformer comprises a base, wherein a transformer box is fixedly connected to the top of the base, a transformer element is arranged at the bottom of an inner cavity of the transformer box, stress buffering mechanisms are respectively arranged at two sides of the top of the base and comprise a vertical plate, a first spring, a second spring, a movable plate, a connecting plate, a rotating shaft seat and a transverse plate, the first spring is fixedly connected to the top and the bottom of the inner side of the vertical plate, one end of the first spring, far away from the vertical plate, is fixedly connected with the transformer box, the second spring is fixedly connected to the inner side of the vertical plate, one end of the second spring, far away from the vertical plate, is fixedly connected with the movable plate, the top and the bottom of the movable plate are respectively rotatably connected with the connecting plate through rotating shafts, one end of the connecting plate, far away from the movable plate, one side fixedly connected with third spring that the second spring was kept away from to the fly leaf, one side and transformer case fixed connection that the fly leaf was kept away from to the third spring, the top of riser is rotated through the pivot and is connected with the diaphragm, the bottom of diaphragm and the top contact of transformer case.
Preferably, the inside heat dissipation mechanism of inner chamber fixedly connected with of base, inside heat dissipation mechanism includes water pump, condenser pipe and fan, the bottom fixed connection of water pump and base inner chamber, the play water piping connection of water pump has the condenser pipe, the one end that the water pump outlet pipe was kept away from to the condenser pipe runs through the right side of base and transformer box in proper order and extends to the top of transformer element, the one end that the condenser pipe is located the transformer box inner chamber runs through transformer box and base once more and extends to the inner chamber of base, the equal fixedly connected with fan in both sides at transformer box inner chamber top.
Preferably, the two sides of the top of the base are fixedly connected with connecting rods, and the tops of the connecting rods are movably connected with the bottoms of the vertical plates through rotating shafts.
Preferably, the top and the bottom of both sides of the transformer box are both provided with sliding grooves, inner cavities of the sliding grooves are connected with sliding blocks in a sliding mode, and the sliding blocks are fixedly connected with the rotating shaft seat.
Preferably, the top of the transformer box is fixedly connected with a supporting rod, and the top of the supporting rod is fixedly connected with a rain baffle.
Preferably, the two sides of the top of the transformer box are both provided with slide rails, the inner cavities of the slide rails are connected with pulleys in a sliding manner, and the pulleys are fixedly connected with the bottoms of the transverse plates.
The invention also provides an installation method of the disaster protection device for the special transformer, which comprises the following steps:
s1: the base is fixedly connected to the bottom of the transformer box, and after the transformer box is fixedly connected with the base, the two connecting rods are fixed to the two sides of the top of the base.
S2: the water pump is fixedly installed in the inner cavity of the base, the inner cavity of the base is filled with condensate, the water outlet pipe of the water pump is connected with the condenser pipe, two through holes are formed in the joint of the base and the transformer box, one end, far away from the water pump, of the condenser pipe is placed into the inner cavity of the transformer box through the first through hole, the end of the condenser pipe surrounds the top of the transformer element, and the condenser pipe is placed into the inner cavity of the base through the second through hole.
S3: and welding third springs on two sides of the transformer box, welding the movable plate on one end of the third spring far away from the transformer box, rotatably connecting the connecting plate and the movable plate through a rotating shaft, connecting one end of the connecting plate far away from the movable plate with a rotating shaft seat through the rotating shaft, and welding the rotating shaft seat with the sliding block.
S4: the bottom of the vertical plate is connected with the top of the connecting rod through the rotating shaft, the second spring is fixedly installed between the vertical plate and the movable plate, the first spring is fixedly installed between the first spring and the transformer box, the top of the vertical plate is movably installed on the transverse plate through the rotating shaft, the bottom of the transverse plate is fixedly connected with the pulley, and finally the fans are installed on two sides of the top of the inner cavity of the transformer box.
S5: the supporting rod is fixedly arranged at the top of the transformer box, the transverse plate does not need to slide normally, and then the rain baffle is fixedly arranged at the top of the supporting rod.
The invention has the technical effects and advantages that: compared with the prior art, the disaster protection device for the special transformer and the installation method thereof provided by the invention have the following advantages:
through setting up atress buffer gear, can be when this device receives external impact, the impact passes through first spring, the second spring, the cooperation of fly leaf and even board, thereby with outside impact maximum reduction, through setting up water pump and condenser pipe, the condensate of base inner chamber is drawn through the inlet tube in water pump work, the inside of rethread outlet pipe income condenser pipe makes air conditioning, the radiating effect of this device is increased, thereby the mounted position of having solved partial transformer is lower, receive external impact easily, if the transformer receives the striking of great dynamics, damage the internals easily, influence the normal work of transformer, and the long-time work of transformer can produce a large amount of heats, if can not in time dispel the heat can cause the problem of circuit short circuit.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a force-receiving buffer mechanism according to the present invention;
fig. 3 is a schematic structural diagram of an internal heat dissipation mechanism of the present invention:
FIG. 4 is an enlarged view of the structure of the region A in FIG. 1 according to the present invention:
fig. 5 is a schematic flow chart of the installation method of the present invention.
In the figure: 1. a base; 2. a transformer tank; 3. a transformer element; 4. a stress buffering mechanism; 41 riser plates; 42. a first spring; 43. a second spring; 44. a movable plate; 45. connecting plates; 46. a rotating shaft seat; 47. a transverse plate; 48. a third spring; 5. an internal heat dissipation mechanism; 51. a water pump; 52. a condenser tube; 53. a fan; 6. a connecting rod; 7. a chute; 8. a slider; 9. a support bar; 10. a rain shield; 11. a slide rail; 12. a pulley.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a disaster protection device for a special transformer as shown in figures 1-4, which comprises a base 1, wherein the top of the base 1 is fixedly connected with a transformer box 2, the bottom of the inner cavity of the transformer box 2 is provided with a transformer element 3, two sides of the top of the base 1 are respectively provided with a stress buffer mechanism 4, each stress buffer mechanism 4 comprises a vertical plate 41, a first spring 42, a second spring 43, a movable plate 44, a connecting plate 45, a rotating shaft seat 46 and a transverse plate 47, the top and the bottom of the inner side of each vertical plate 41 are respectively and fixedly connected with the first spring 42, one end of each first spring 42, far away from the corresponding vertical plate 41, is fixedly connected with the transformer box 2, the inner side of each vertical plate 41 is fixedly connected with the second spring 43, one end of each second spring 43, far away from the corresponding vertical plate 41, is fixedly connected with the movable plate 44, the top and the bottom, one end of link board 45, far away from movable plate 44, is connected with pivot seat 46 through the pivot rotation, pivot seat 46 and the contact of transformer case 2, one side fixedly connected with third spring 48 of second spring 43 is kept away from to movable plate 44, one side and transformer case 2 fixed connection that movable plate 44 was kept away from to third spring 48, the top of riser 41 is connected with diaphragm 47 through the pivot rotation, the bottom of diaphragm 47 and the top contact of transformer case 2.
Preferably, the inner cavity of the base 1 is fixedly connected with the internal heat dissipation mechanism 5, the internal heat dissipation mechanism 5 includes a water pump 51, a condenser pipe 52 and a fan 53, the water pump 51 is fixedly connected with the bottom of the inner cavity of the base 1, a water outlet pipe of the water pump 51 is connected with the condenser pipe 52, one end of the condenser pipe 52, which is far away from a water outlet pipe of the water pump 51, sequentially penetrates through the right sides of the base 1 and the transformer box 2 and extends to the top of the transformer element 3, one end of the condenser pipe 52, which is located in the inner cavity of the transformer box 2, penetrates through the transformer box 2 and the base 1 again and extends to the inner cavity of the base 1, and the fans 53 are.
Through adopting above-mentioned technical scheme, can work when producing high temperature for a long time at transformer element 3, carry out rapid cooling and scatter, avoid transformer element 3 to be in the high temperature state for a long time and cause the short circuit.
Preferably, both sides of the top of the base 1 are fixedly connected with a connecting rod 6, and the top of the connecting rod 6 is movably connected with the bottom of the vertical plate 41 through a rotating shaft.
Through adopting above-mentioned technical scheme, can increase a movable joint between riser 41 and base 1, directly hit riser 41 to cut off when avoiding receiving the striking.
Preferably, the top and the bottom of the two sides of the transformer box 2 are both provided with sliding grooves 7, the inner cavity of each sliding groove 7 is slidably connected with a sliding block 8, and each sliding block 8 is fixedly connected with the rotating shaft seat 46.
By adopting the above technical scheme, the third spring 48 can generate the largest elastic support, and the force bearing point can be adjusted according to different impact angles for buffering.
Preferably, a supporting rod 9 is fixedly connected to the top of the transformer tank 2, and a rain shield 10 is fixedly connected to the top of the supporting rod 9.
Through adopting above-mentioned technical scheme, can keep off the rain when raining.
Preferably, the two sides of the top of the transformer box 2 are both provided with slide rails 11, an inner cavity of each slide rail 11 is slidably connected with a pulley 12, and the pulley 12 is fixedly connected with the bottom of the transverse plate 47.
Through adopting above-mentioned technical scheme, can increase the sliding force when riser 41 first half receives the striking, and the rocking scope that causes when reducible riser 41 atress.
The invention also provides an installation method of the disaster protection device for the special transformer, which comprises the following steps:
s1: the base 1 is fixedly connected to the bottom of the transformer box 2, and after the transformer box 2 is fixedly connected with the base 1, the two connecting rods 6 are fixed to two sides of the top of the base 1.
S2: with water pump 51 fixed mounting in the inner chamber of base 1, fill the inner chamber of base 1 with the condensate, connect condenser pipe 52 at the outlet pipe part of water pump 51, beat two through-holes with the junction of base 1 and transformer case 2 again, put into the inner chamber of transformer case 2 through first through-hole with the one end that condenser pipe 52 kept away from water pump 51, encircle in the top of transformer component 3, put into the inner chamber of base 1 through the second through-hole with condenser pipe 52 again.
S3: the third springs 48 are welded on two sides of the transformer box 2, the movable plate 44 is welded on one end of the third springs 48 far away from the transformer box 2, the connecting plate 45 is rotatably connected with the movable plate 44 through a rotating shaft, one end of the connecting plate 45 far away from the movable plate 44 is connected with the rotating shaft seat 46 through the rotating shaft, and then the rotating shaft seat 46 is welded with the sliding block 8.
S4: the bottom of the vertical plate 41 is connected with the top of the connecting rod 6 through a rotating shaft, the second spring 43 is fixedly installed between the vertical plate 41 and the movable plate 44, the first spring 42 is fixedly installed between the first spring 42 and the transformer box 2, the top of the vertical plate 41 is movably installed on the transverse plate 47 through the rotating shaft, the bottom of the transverse plate 47 is fixedly connected with the pulley 12, and finally the fans 53 are installed on two sides of the top of the inner cavity of the transformer box 2.
S5: with bracing piece 9 fixed mounting at the top of transformer case 2, do not influence diaphragm 47 normal slip can, again with the top fixed mounting weather shield 10 of bracing piece 9.
The working principle is as follows: the device is arranged outdoors, when the device receives external force impact, the device is inwards extruded through the fixed connection of the vertical plate 41 and the first spring 42, then the movable plate 44 is extruded through the arrangement of the second spring 43, the movable plate 44 is rotationally connected with the connecting plate 45 through the rotating shaft to drive the rotating shaft seat 46 to expand outwards, the movable plate 44 extrudes the third spring 48 due to the movement of the rotating shaft seat 46, thereby the impact force is buffered to the maximum degree when the device receives the external force impact, when the transformer element 3 works for a long time and generates high temperature, a user opens the water pump 51 to work through the external controller, the water pump 51 sucks condensate in the inner cavity of the base 1, the condensate is discharged into the inner cavity of the condensing pipe 52 through the communication of the water pump 51 and the condensing pipe 52 to emit cold air, then opens the fan 53 to work through the external controller, the fan 53 blows the cold air to each corner of the inner cavity of the transformer box 2 to the maximum degree to, therefore, the problems that the installation positions of partial transformers are low, the partial transformers are easy to be impacted by external force, internal parts are easy to damage if the transformers are impacted by large force, the normal work of the transformers is influenced, the transformers can generate a large amount of heat when working for a long time, and a circuit is short-circuited if the heat cannot be dissipated timely are solved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a calamity protector for special type transformer, includes base (1), its characterized in that: the transformer box is characterized in that a transformer box (2) is fixedly connected to the top of the base (1), a transformer element (3) is arranged at the bottom of an inner cavity of the transformer box (2), stress buffering mechanisms (4) are arranged on two sides of the top of the base (1), each stress buffering mechanism (4) comprises a vertical plate (41), a first spring (42), a second spring (43), a movable plate (44), a connecting plate (45), a rotating shaft seat (46) and a transverse plate (47), the top and the bottom of the inner side of each vertical plate (41) are fixedly connected with the first spring (42), one end, far away from the vertical plate (41), of each first spring (42) is fixedly connected with the transformer box (2), the second spring (43) is fixedly connected to the inner side of each vertical plate (41), one end, far away from the vertical plate (41), of each second spring (43) is fixedly connected with the movable plate (44), the top and the bottom of each movable plate (44), even board (45) keep away from the one end of fly leaf (44) and rotate through the pivot and be connected with pivot seat (46), pivot seat (46) and transformer case (2) contact, one side fixedly connected with third spring (48) of second spring (43) are kept away from in fly leaf (44), one side and transformer case (2) fixed connection of fly leaf (44) are kept away from in third spring (48), the top of riser (41) is rotated through the pivot and is connected with diaphragm (47), the bottom of diaphragm (47) and the top contact of transformer case (2).
2. The disaster prevention device for the special transformer as claimed in claim 1, wherein: the utility model discloses an inner chamber fixedly connected with inside heat dissipation mechanism (5) of base (1), inside heat dissipation mechanism (5) include water pump (51), condenser pipe (52) and fan (53), the bottom fixed connection of water pump (51) and base (1) inner chamber, the water piping connection of water pump (51) has condenser pipe (52), the one end that water pump (51) outlet pipe was kept away from in condenser pipe (52) runs through the right side of base (1) and transformer case (2) in proper order and extends to the top of transformer component (3), the one end that condenser pipe (52) are located transformer case (2) inner chamber runs through transformer case (2) and base (1) once more and extends to the inner chamber of base (1), the equal fixedly connected with fan (53) in both sides at transformer case (2) inner chamber top.
3. The disaster prevention device for the special transformer as claimed in claim 1, wherein: the base is characterized in that connecting rods (6) are fixedly connected to the two sides of the top of the base (1), and the top of each connecting rod (6) is movably connected with the bottom of the corresponding vertical plate (41) through a rotating shaft.
4. The disaster prevention device for the special transformer as claimed in claim 1, wherein: the top and the bottom of transformer case (2) both sides have all been seted up spout (7), the inner chamber sliding connection of spout (7) has slider (8), slider (8) and pivot seat (46) fixed connection.
5. The disaster prevention device for the special transformer as claimed in claim 1, wherein: the top fixedly connected with bracing piece (9) of transformer case (2), the top fixedly connected with weather shield (10) of bracing piece (9).
6. The disaster prevention device for the special transformer as claimed in claim 1, wherein: slide rail (11) have all been seted up to the both sides at transformer case (2) top, the inner chamber sliding connection of slide rail (11) has pulley (12), the bottom fixed connection of pulley (12) and diaphragm (47).
7. A method of installing a disaster prevention device for a special transformer according to any one of claims 1 to 6, wherein: the method comprises the following steps:
s1: the base (1) is fixedly connected to the bottom of the transformer box (2), and after the transformer box (2) is fixedly connected with the base (1), the two connecting rods (6) are fixed to the two sides of the top of the base (1).
S2: the water pump (51) is fixedly installed in an inner cavity of the base (1), the inner cavity of the base (1) is filled with condensate, a condensation pipe (52) is connected to a water outlet pipe portion of the water pump (51), two through holes are punched at the joint of the base (1) and the transformer box (2), one end, far away from the water pump (51), of the condensation pipe (52) is placed into the inner cavity of the transformer box (2) through a first through hole and surrounds the top of the transformer element (3), and then the condensation pipe (52) is placed into the inner cavity of the base (1) through a second through hole.
S3: the third springs (48) are welded on two sides of the transformer box (2), the movable plate (44) is welded at one end, far away from the transformer box (2), of the third springs (48), the connecting plate (45) is rotatably connected with the movable plate (44) through a rotating shaft, one end, far away from the movable plate (44), of the connecting plate (45) is connected with the rotating shaft seat (46) through the rotating shaft, and then the rotating shaft seat (46) is welded with the sliding block (8).
S4: the bottom of a vertical plate (41) is connected with the top of a connecting rod (6) through a rotating shaft, a second spring (43) is fixedly installed between the vertical plate (41) and a movable plate (44), a first spring (42) is fixedly installed between the first spring (42) and a transformer box (2), the top of the vertical plate (41) is movably installed on a transverse plate (47) through the rotating shaft, the bottom of the transverse plate (47) is fixedly connected with a pulley (12), and finally a fan (53) is installed on two sides of the top of an inner cavity of the transformer box (2).
S5: the supporting rod (9) is fixedly arranged at the top of the transformer box (2), the transverse plate (47) is not influenced to normally slide, and then the rain baffle (10) is fixedly arranged at the top of the supporting rod (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210487.5A CN110911090A (en) | 2019-12-02 | 2019-12-02 | Disaster protection device for special transformer and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210487.5A CN110911090A (en) | 2019-12-02 | 2019-12-02 | Disaster protection device for special transformer and installation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110911090A true CN110911090A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911210487.5A Withdrawn CN110911090A (en) | 2019-12-02 | 2019-12-02 | Disaster protection device for special transformer and installation method thereof |
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| CN (1) | CN110911090A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284705A (en) * | 2021-06-02 | 2021-08-20 | 广东特变电气股份有限公司 | Photovoltaic wind-powered electricity generation duplex winding split dry-type transformer |
-
2019
- 2019-12-02 CN CN201911210487.5A patent/CN110911090A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284705A (en) * | 2021-06-02 | 2021-08-20 | 广东特变电气股份有限公司 | Photovoltaic wind-powered electricity generation duplex winding split dry-type transformer |
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Application publication date: 20200324 |