CN105826052A - Low-voltage coil and high-voltage coil for dry-type transformer - Google Patents
Low-voltage coil and high-voltage coil for dry-type transformer Download PDFInfo
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- CN105826052A CN105826052A CN201610402092.5A CN201610402092A CN105826052A CN 105826052 A CN105826052 A CN 105826052A CN 201610402092 A CN201610402092 A CN 201610402092A CN 105826052 A CN105826052 A CN 105826052A
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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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
- H01F27/28—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
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- Coils Of Transformers For General Uses (AREA)
Abstract
The invention belongs to the technical field of transformers, and particularly relates to a low-voltage coil for a dry-type transformer. The low-voltage coil comprises a low-voltage coil framework, an enameled wire which is closely wound on the low-voltage coil framework, an enameled wire insulating layer for isolating the enameled wire, a low-voltage insulating bushing, a low-voltage wire outlet line and a low-voltage coil insulating layer wrapping the low-voltage coil framework, the enameled wire and the enameled wire insulating layer. The low-voltage coil is characterized in that a clamping element is arranged outside the low-voltage coil insulating layer. The invention further discloses a high-voltage coil. The low-voltage coil and the high-voltage coil have the following main advantages of being simple in structure, easy to manufacture, high in manufactured finished product qualified rate, low in operation noise, high in overload capacity and easy to repair and maintain.
Description
Technical field
The invention belongs to transformer technology field, especially relate to a kind of low-voltage coil for dry-type transformer and high-tension coil.
Background technology
Dry-type transformer is widely used in the places such as local lighting, skyscraper, airport, harbour CNC plant equipment, and dry-type transformer refers to iron core and winding is not immersed in the transformator in insulating oil, and its type of cooling is divided into natural air cooling and forces air to cool down.Along with the fast development of power industry, especially intelligent grid, the use demand of dry-type transformer increases day by day.
In prior art, dry-type transformer is placed insulating barrier between low-voltage coil and high-tension coil and is realized the isolation of two coils, but insulant is the most aging after overload uses, and have impact on the life-span of transformator.On the other hand, in prior art, when having gap between low-voltage coil and high-tension coil, generally use cushion block, this cushion block that transformator can be made to produce vibrations noise；Not only causing sound pollution, vibrations also can make both intervals increase, affect the performance of transformator.
Summary of the invention
In order to solve the problems referred to above, it is an object of the invention to disclose a kind of low-voltage coil for dry-type transformer and high-tension coil, it realizes by the following technical solutions.
A kind of low-voltage coil for dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, by low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding get up low-voltage coil insulating barrier；nullIt is characterized in that，Also there is outside low-voltage coil insulating barrier the first catch element、Second catch element、3rd catch element and the 4th catch element are constituted，Low-voltage coil insulating barrier is by semi-cylindrical the first sweep being sequentially connected with、Cuboid the first straight portion、Semi-cylindrical the second sweep、Cuboid the second straight portion is constituted，First sweep、First straight portion、Second sweep、Second straight portion forms the column structure being sealed，There is inside column chamber unshakable in one's determination，First catch element is positioned at outside the first sweep，First catch element is by the first connector、First locking member is constituted，One end of first connector is connected to the outer surface of the first sweep，The other end of the first connector is connected on the first locking member，First connector is extended to the plane at the lower surface place of the first sweep by the plane at the upper surface place of the first sweep；Second catch element is positioned at outside the first straight portion, second catch element is made up of the second connector, the second locking member, one end of second connector is connected to the outer surface of the first straight portion, the other end of the second connector is connected on the second locking member, and the second connector is extended to the plane at the lower surface place of the first straight portion by the plane at the upper surface place of the first straight portion；3rd catch element is positioned at outside the second sweep, 3rd catch element is made up of the 3rd connector the 32, the 3rd locking member, one end of 3rd connector is connected to the outer surface of the second sweep, the other end of the 3rd connector is connected on the 3rd locking member, and the 3rd connector is extended to the plane at the lower surface place of the second sweep by the plane at the upper surface place of the second sweep；4th catch element is positioned at outside the second straight portion, 4th catch element is made up of the 4th connector, the 4th locking member, one end of 4th connector is connected to the outer surface of the second straight portion, the other end of the 4th connector is connected on the 4th locking member, and the 4th connector is extended to the plane at the lower surface place of the second straight portion by the plane at the upper surface place of the second straight portion；First connector, the second connector, the 3rd connector, the 4th connector are all rectangular shapes, and the first locking member, the second locking member, the 3rd locking member, the 4th locking member are all the cylinder body shapes of truncated part cylinder；nullIn the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the first catch element and the axis of symmetry of the 3rd catch element are in a straight line and the center of mistake low-voltage coil，The axis of symmetry of the second catch element and the axis of symmetry of the 4th catch element in a straight line and cross low-voltage coil center，The axis of symmetry of the first catch element and the axis of symmetry of the second catch element are perpendicular，First locking member and the first connector connection，The width of the first connector is less than the diameter of a circle at the first locking member place，Second locking member and the second connector connection，The width of the second connector is less than the diameter of a circle at the second locking member place，3rd locking member and the 3rd connector connection，The width of the 3rd connector is less than the diameter of a circle at the 3rd locking member place，4th locking member and the 4th connector connection，The width of the 4th connector is less than the diameter of a circle at the 4th locking member place.
A kind of low-voltage coil for dry-type transformer described above, it is characterised in that described first catch element, the second catch element, the 3rd catch element, the material of the 4th catch element can be all high-temperature resistance plastice or pottery.
Further, a kind of low-voltage coil for dry-type transformer described above, it is characterised in that described high-temperature resistance plastice is politef or organosilane crosslinked polyethylene.
A kind of high-tension coil for dry-type transformer, include high voltage ring skeleton, close be wound on high voltage ring skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, high-tension insulating bushing, high-voltage terminal row, by high voltage ring skeleton, enamel-covered wire, magnet wire insulation layer cladding get up high-voltage coil insulation layer；It is characterized in that, described high-voltage coil insulation layer is by semi-cylindrical the 3rd sweep being sequentially connected with, cuboid the 3rd straight portion, semi-cylindrical the 4th sweep, cuboid the 4th straight portion is constituted, 3rd sweep, 3rd straight portion, 4th sweep, 4th straight portion forms the column structure being sealed, there is inside column appearance low-voltage coil chamber, inside 3rd sweep, there is the first buckling groove, the opening of the first buckling groove is positioned at the inner surface of the 3rd sweep, first buckling groove is extended to the plane at the lower surface place of the 3rd sweep by the plane at the upper surface place of the 3rd sweep；Having the second buckling groove inside 3rd straight portion, the opening of the second buckling groove is positioned at the inner surface of the 3rd straight portion, and the second buckling groove is extended to the plane at the lower surface place of the 3rd straight portion by the plane at the upper surface place of the 3rd straight portion；Having the 3rd buckling groove inside 4th sweep, the opening of the 3rd buckling groove is positioned at the inner surface of the 4th sweep, and the 3rd buckling groove is extended to the plane at the lower surface place of the 4th sweep by the plane at the upper surface place of the 4th sweep；4th straight partial interior has the 4th buckling groove, and the opening of the 4th buckling groove is positioned at the inner surface of the 4th straight portion, and the 4th buckling groove is extended to the plane at the lower surface place of the 4th straight portion by the plane at the upper surface place of the 4th straight portion；First buckling groove, the second buckling groove, the 3rd buckling groove, the 4th buckling groove are all the cylinder body shapes of truncated part cylinder；In the orthographic projection of the plane of any one axis perpendicular with high-tension coil: the axis of symmetry of the first buckling groove and the axis of symmetry of the 3rd buckling groove are in a straight line and the center of mistake high-tension coil, the axis of symmetry of the second buckling groove and the axis of symmetry of the 4th buckling groove in a straight line and cross high-tension coil center, the axis of symmetry of the first buckling groove and the axis of symmetry of the second buckling groove are perpendicular；The diameter of a circle at the first locking member place is less than the diameter of a circle at the first buckling groove place, the diameter of a circle at the second locking member place is less than the diameter of a circle at the second buckling groove place, the diameter of a circle at the 3rd locking member place is less than the diameter of a circle at the 3rd buckling groove place, and the diameter of a circle at the 4th locking member place is less than the diameter of a circle at the 4th buckling groove place.
The present invention has a following main beneficial effect: simple in construction, easily fabricated, manufacture that product qualified rate is high, running noises is low, overload capacity by force, for ease of maintenaince with maintenance.
Accompanying drawing explanation
Fig. 1 is the perspective view of the low-voltage coil of embodiment 1 of the present invention.
Fig. 2 is the top view that Fig. 1 amplifies.
Fig. 3 is the perspective view of the high-tension coil of embodiment 2 of the present invention.
Fig. 4 is the top view that Fig. 3 amplifies.
Fig. 5 is the perspective view of the combination of the low-voltage coil in embodiment 1,2, high-tension coil.
Fig. 6 is the top view of Fig. 5.
Fig. 7 is the perspective view of the low-voltage coil of embodiment 3 of the present invention.
Fig. 8 is the perspective view of the low-voltage coil of embodiment 4 of the present invention.
Fig. 9 is the perspective view of the low-voltage coil of embodiment 5 of the present invention.
Figure 10 is the perspective view of the low-voltage coil of embodiment 6 of the present invention.
Figure 11 is the perspective view of the low-voltage coil of embodiment 7 of the present invention.
Figure 12 is the perspective view of the low-voltage coil of embodiment 8 of the present invention.
Detailed description of the invention
Embodiment 1
Ask for an interview Fig. 1 and Fig. 2, a kind of low-voltage coil for dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, by low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding get up low-voltage coil insulating barrier；nullIt is characterized in that，Also there is outside low-voltage coil insulating barrier the first catch element、Second catch element、3rd catch element and the 4th catch element are constituted，Low-voltage coil insulating barrier is by semi-cylindrical the first sweep 1 being sequentially connected with、Cuboid the first straight portion 2、Semi-cylindrical the second sweep 3、Cuboid the second straight portion 4 is constituted，First sweep、First straight portion、Second sweep、Second straight portion forms the column structure being sealed，There is inside column chamber 5 unshakable in one's determination，First catch element is positioned at outside the first sweep，First catch element is by the first connector 12、First locking member 11 is constituted，One end of first connector is connected to the outer surface of the first sweep，The other end of the first connector is connected on the first locking member，First connector is extended to the plane at the lower surface place of the first sweep by the plane at the upper surface place of the first sweep；Second catch element is positioned at outside the first straight portion, second catch element is made up of second connector the 22, second locking member 21, one end of second connector is connected to the outer surface of the first straight portion, the other end of the second connector is connected on the second locking member, and the second connector is extended to the plane at the lower surface place of the first straight portion by the plane at the upper surface place of the first straight portion；3rd catch element is positioned at outside the second sweep, 3rd catch element is made up of the 3rd connector the 32, the 3rd locking member 31, one end of 3rd connector is connected to the outer surface of the second sweep, the other end of the 3rd connector is connected on the 3rd locking member, and the 3rd connector is extended to the plane at the lower surface place of the second sweep by the plane at the upper surface place of the second sweep；4th catch element is positioned at outside the second straight portion, 4th catch element is made up of the 4th connector the 42, the 4th locking member 41, one end of 4th connector is connected to the outer surface of the second straight portion, the other end of the 4th connector is connected on the 4th locking member, and the 4th connector is extended to the plane at the lower surface place of the second straight portion by the plane at the upper surface place of the second straight portion；First connector, the second connector, the 3rd connector, the 4th connector are all rectangular shapes, and the first locking member, the second locking member, the 3rd locking member, the 4th locking member are all the cylinder body shapes of truncated part cylinder；nullIn the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the first catch element and the axis of symmetry of the 3rd catch element are in a straight line and the center of mistake low-voltage coil，The axis of symmetry of the second catch element and the axis of symmetry of the 4th catch element in a straight line and cross low-voltage coil center，The axis of symmetry of the first catch element and the axis of symmetry of the second catch element are perpendicular，First locking member and the first connector connection，The width of the first connector is less than the diameter of a circle at the first locking member place，Second locking member and the second connector connection，The width of the second connector is less than the diameter of a circle at the second locking member place，3rd locking member and the 3rd connector connection，The width of the 3rd connector is less than the diameter of a circle at the 3rd locking member place，4th locking member and the 4th connector connection，The width of the 4th connector is less than the diameter of a circle at the 4th locking member place.
Embodiment 2
Ask for an interview Fig. 3 and Fig. 4, a kind of high-tension coil for dry-type transformer, include high voltage ring skeleton, close be wound on high voltage ring skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, high-tension insulating bushing, high-voltage terminal row, by high voltage ring skeleton, enamel-covered wire, magnet wire insulation layer cladding get up high-voltage coil insulation layer；It is characterized in that, described high-voltage coil insulation layer is by semi-cylindrical the 3rd sweep 6 being sequentially connected with, cuboid the 3rd straight portion 7, semi-cylindrical the 4th sweep 8, cuboid the 4th straight portion 9 is constituted, 3rd sweep, 3rd straight portion, 4th sweep, 4th straight portion forms the column structure being sealed, there is inside column appearance low-voltage coil chamber 101, there is inside 3rd sweep the first buckling groove 61, the opening of the first buckling groove is positioned at the inner surface of the 3rd sweep, first buckling groove is extended to the plane at the lower surface place of the 3rd sweep by the plane at the upper surface place of the 3rd sweep；Having the second buckling groove 71 inside 3rd straight portion, the opening of the second buckling groove is positioned at the inner surface of the 3rd straight portion, and the second buckling groove is extended to the plane at the lower surface place of the 3rd straight portion by the plane at the upper surface place of the 3rd straight portion；Having the 3rd buckling groove 81 inside 4th sweep, the opening of the 3rd buckling groove is positioned at the inner surface of the 4th sweep, and the 3rd buckling groove is extended to the plane at the lower surface place of the 4th sweep by the plane at the upper surface place of the 4th sweep；4th straight partial interior has the 4th buckling groove 91, and the opening of the 4th buckling groove is positioned at the inner surface of the 4th straight portion, and the 4th buckling groove is extended to the plane at the lower surface place of the 4th straight portion by the plane at the upper surface place of the 4th straight portion；First buckling groove, the second buckling groove, the 3rd buckling groove, the 4th buckling groove are all the cylinder body shapes of truncated part cylinder；In the orthographic projection of the plane of any one axis perpendicular with high-tension coil: the axis of symmetry of the first buckling groove and the axis of symmetry of the 3rd buckling groove are in a straight line and the center of mistake high-tension coil, the axis of symmetry of the second buckling groove and the axis of symmetry of the 4th buckling groove in a straight line and cross high-tension coil center, the axis of symmetry of the first buckling groove and the axis of symmetry of the second buckling groove are perpendicular.
A kind of high-tension coil for dry-type transformer described above, it is characterised in that the first buckling groove, the second buckling groove, the 3rd buckling groove, the curved portion of cross section of the 4th buckling groove are all the circular arcs of more than 2/3.
In Fig. 5 and Fig. 6, the diameter of a circle at the first locking member place is less than the diameter of a circle at the first buckling groove place, the diameter of a circle at the second locking member place is less than the diameter of a circle at the second buckling groove place, the diameter of a circle at the 3rd locking member place is less than the diameter of a circle at the 3rd buckling groove place, and the diameter of a circle at the 4th locking member place is less than the diameter of a circle at the 4th buckling groove place；
When assembled state, the first locking member is entirely located in the first buckling groove, and the first connector at least has a part not in the first buckling groove, and the first sweep and the 3rd sweep are discontiguous；Second locking member is entirely located in the second buckling groove, and the second connector at least has a part not in the second buckling groove, and the first straight portion is discontiguous with the 3rd straight portion；3rd locking member is entirely located in the 3rd buckling groove, and the 3rd connector at least has a part not in the 3rd buckling groove, and the second sweep and the 4th sweep are discontiguous；4th locking member is entirely located in the 4th buckling groove, and the 4th connector at least has a part not in the 4th buckling groove, and the first straight portion is discontiguous with the 3rd straight portion；Cooling duct 102 is formed between low-voltage coil and high-tension coil.
Embodiment 3
Ask for an interview Fig. 7, and with reference to Fig. 1 and Fig. 2, a kind of high-tension coil for dry-type transformer, substantially with embodiment 1, difference is low-voltage coil insulating barrier, there is not the second catch element and the 4th catch element outside low-voltage coil insulating barrier.
Embodiment 4
Ask for an interview Fig. 8, and with reference to Fig. 1 and Fig. 2, a kind of low-voltage coil for dry-type transformer, substantially with embodiment 1, difference is low-voltage coil insulating barrier, there is not the first catch element and the 3rd catch element outside low-voltage coil insulating barrier.
Embodiment 5
Ask for an interview Fig. 9, and with reference to Fig. 1 and Fig. 2, a kind of low-voltage coil for dry-type transformer, substantially with embodiment 1, difference is low-voltage coil insulating barrier, there is not the first catch element outside low-voltage coil insulating barrier.
Embodiment 6
Ask for an interview Figure 10, and with reference to Fig. 1 and Fig. 2, a kind of low-voltage coil for dry-type transformer, substantially with embodiment 1, difference is low-voltage coil insulating barrier, there is not the second catch element outside low-voltage coil insulating barrier.
Embodiment 3 to embodiment 6, hence it is evident that decrease the quantity of catch element, certainly decrease the consumption of material, make cost lower.
Embodiment 7
Ask for an interview Figure 11, and with reference to Fig. 1 and Fig. 2, a kind of low-voltage coil for dry-type transformer, basic with embodiment 1, difference is low-voltage coil insulating barrier, first connector is not the plane that the plane at the upper surface place from the first sweep extends to the lower surface place of the first sweep, but the plane from the upper surface place of the first sweep extends below more than the plane at lower surface place of the first sweep；Second connector is not the plane that the plane at the upper surface place from the first straight portion extends to the lower surface place of the first straight portion, but the plane from the upper surface place of the first straight portion extends below more than the plane at lower surface place of the first straight portion；3rd connector is not the plane that the plane at the upper surface place from the second sweep extends to the lower surface place of the second sweep, but the plane from the upper surface place of the second sweep extends below more than the plane at lower surface place of the second sweep；4th connector is not the plane that the plane at the upper surface place from the second straight portion extends to the lower surface place of the second straight portion, but the plane from the upper surface place of the second straight portion extends below more than the plane at lower surface place of the second straight portion.
This embodiment equally reduces the material consumption of catch element.
Embodiment 8
Ask for an interview Figure 12, and with reference to Fig. 1 and Fig. 2, a kind of low-voltage coil for dry-type transformer, basic with embodiment 1, difference is low-voltage coil insulating barrier, first catch element, the second catch element, the 3rd catch element, the 4th catch element are all segmentation structure, and this embodiment can reduce the material consumption of catch element further.
A kind of low-voltage coil for dry-type transformer in embodiment 1,3-8, when it has the first catch element, the second catch element, the 3rd catch element, four catch element, can be all segmentation structure, and each catch element is at least divided into two sections.
Embodiment 3-8 catch element quantity/and or material consumption reduce in the case of, being relatively fixed of high-tension coil and low-voltage coil can be reached equally, before high-tension coil is inserted in low-voltage coil, inwall at buckling groove coats viscose glue, or, or outside locking member, coat viscose glue simultaneously, and high-tension coil can be made to be firmly fixed with low-voltage coil, transformator can significantly reduce running noises when running；Simultaneously as be formed with cooling duct between low-voltage coil and high-tension coil, thus can the operating heat of evanescence of heat rapidly, from cooling duct, be even blown into cooling media, the overlond running ability of transformator can be significantly increased；The catch element of the low-voltage coil in the present invention can be integrally formed when low-voltage coil solidifies；The buckling groove of low-voltage coil also can be integrally formed when high-tension coil solidifies.
In the present invention, the first catch element, the second catch element, the 3rd catch element, the material of the 4th catch element can be all high-temperature resistance plastice or pottery.
Further, high-temperature resistance plastice described above is politef or organosilane crosslinked polyethylene.
In the present invention, first catch element, the second catch element, the 3rd catch element, the material of the 4th catch element, by weight, all can be made up of following material: high density polyethylene (HDPE): 50-70 part, magnesium hydroxide: 15-30 part, polymethyl siloxane: 5-10 part, politef: 10-15 part, nano silicon: 20-30 part, maleic anhydride grafted polyethylene: 3-5 part, epoxy resin: 20-40 part, Muscovitum: 10-20 part；Or by weight, all can be made up of following material: high density polyethylene (HDPE): 60 parts, magnesium hydroxide: 20 parts, polymethyl siloxane: 7 parts, politef: 12 parts, nano silicon: 25 parts, maleic anhydride grafted polyethylene: 4 parts, epoxy resin: 30 parts, Muscovitum: 15 parts, reach optimization formula；Or by weight, all can be made up of following material: high density polyethylene (HDPE): 50 parts, magnesium hydroxide: 15 parts, polymethyl siloxane: 5 parts, politef: 10 parts, nano silicon: 20 parts, maleic anhydride grafted polyethylene: 3 parts, epoxy resin: 20 parts, Muscovitum: 10 parts, reach suboptimum formula；Or by weight, all can be made up of following material: high density polyethylene (HDPE): 70 parts, magnesium hydroxide: 30 parts, polymethyl siloxane: 10 parts, politef: 15 parts, nano silicon: 30 parts, maleic anhydride grafted polyethylene: 5 parts, epoxy resin: 40 parts, Muscovitum: 20 parts, reach more excellent formula；There is heat-proof aging, proof voltage performance that the catch element of above-mentioned material can reach more excellent.
Take the catch element material of any of the above-described formula, be pressed into 10mm thickness, respectively take 50, the sample of 10cm × 5cm, keep 245 DEG C of experimental temperatures, continuous 24 hours × 30 days, through test, after test, (1) sample is 2.5% without eyesight visible crack, the area contraction maximum of (2) sample, (3) elongation at break changing value is 5.6% to the maximum, (4) to each sample along length aspect doubling, do not rupture, (5) proof voltage breakdown value: minimum 42131 volts；For optimum formula, after test, (1) sample is without eyesight visible crack, (2) the area contraction maximum of sample is 1.39%, (3) elongation at break changing value is 3.31% to the maximum, (4) to each sample along length aspect doubling, do not rupture, (5) proof voltage breakdown value: minimum 45387 volts；Formula for suboptimum, after test, (1) sample is without eyesight visible crack, (2) the area contraction maximum of sample is 1.65%, (3) elongation at break changing value is 3.75% to the maximum, (4) to each sample along length aspect doubling, do not rupture, (5) proof voltage breakdown value: minimum 44122 volts；For preferably formula, after test, (1) sample is without eyesight visible crack, (2) the area contraction maximum of sample is 2.12%, (3) elongation at break changing value is 4.29% to the maximum, (4) to each sample along length aspect doubling, do not rupture, (5) proof voltage breakdown value: minimum 43580 volts.
While test, having taken catch element material is crosslinked polyethylene, test by above-mentioned condition equally, after test, (1) every sample has eyesight visible crack, and the area contraction maximum of (2) sample is 17.66%, (3) elongation at break changing value is 16.34% to the maximum, (4) to each sample along length aspect doubling, 39 rupture, (5) proof voltage breakdown value: minimum 18453 volts.
Therefore, the catch element material in the present invention has reached the impacts of performance such as preferable heat-proof aging, proof voltage.
The present invention have simple in construction, easily fabricated, manufacture that product qualified rate is high, running noises is low, overload capacity by force, for ease of maintenaince with maintenance.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (10)
1. for the low-voltage coil of dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, low-voltage coil insulating barrier that low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding are got up；nullIt is characterized in that，Also there is outside low-voltage coil insulating barrier the first catch element、Second catch element、3rd catch element and the 4th catch element are constituted，Low-voltage coil insulating barrier is by semi-cylindrical the first sweep being sequentially connected with、Cuboid the first straight portion、Semi-cylindrical the second sweep、Cuboid the second straight portion is constituted，First sweep、First straight portion、Second sweep、Second straight portion forms the column structure being sealed，There is inside column chamber unshakable in one's determination，First catch element is positioned at outside the first sweep，First catch element is by the first connector、First locking member is constituted，One end of first connector is connected to the outer surface of the first sweep，The other end of the first connector is connected on the first locking member，First connector is extended to the plane at the lower surface place of the first sweep by the plane at the upper surface place of the first sweep；Second catch element is positioned at outside the first straight portion, second catch element is made up of the second connector, the second locking member, one end of second connector is connected to the outer surface of the first straight portion, the other end of the second connector is connected on the second locking member, and the second connector is extended to the plane at the lower surface place of the first straight portion by the plane at the upper surface place of the first straight portion；3rd catch element is positioned at outside the second sweep, 3rd catch element is made up of the 3rd connector, the 3rd locking member, one end of 3rd connector is connected to the outer surface of the second sweep, the other end of the 3rd connector is connected on the 3rd locking member, and the 3rd connector is extended to the plane at the lower surface place of the second sweep by the plane at the upper surface place of the second sweep；4th catch element is positioned at outside the second straight portion, 4th catch element is made up of the 4th connector, the 4th locking member, one end of 4th connector is connected to the outer surface of the second straight portion, the other end of the 4th connector is connected on the 4th locking member, and the 4th connector is extended to the plane at the lower surface place of the second straight portion by the plane at the upper surface place of the second straight portion；First connector, the second connector, the 3rd connector, the 4th connector are all rectangular shapes, and the first locking member, the second locking member, the 3rd locking member, the 4th locking member are all the cylinder body shapes of truncated part cylinder；nullIn the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the first catch element and the axis of symmetry of the 3rd catch element are in a straight line and the center of mistake low-voltage coil，The axis of symmetry of the second catch element and the axis of symmetry of the 4th catch element in a straight line and cross low-voltage coil center，The axis of symmetry of the first catch element and the axis of symmetry of the second catch element are perpendicular，First locking member and the first connector connection，The width of the first connector is less than the diameter of a circle at the first locking member place，Second locking member and the second connector connection，The width of the second connector is less than the diameter of a circle at the second locking member place，3rd locking member and the 3rd connector connection，The width of the 3rd connector is less than the diameter of a circle at the 3rd locking member place，4th locking member and the 4th connector connection，The width of the 4th connector is less than the diameter of a circle at the 4th locking member place；Described first catch element, the second catch element, the 3rd catch element and the 4th catch element are all segmentation structure, and each catch element is at least divided into two sections.
2. for the low-voltage coil of dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, low-voltage coil insulating barrier that low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding are got up；It is characterized in that, described low-voltage coil is by low-voltage coil insulating barrier and the first catch element outside being positioned at low-voltage coil insulating barrier, second catch element, 3rd catch element and the 4th catch element are constituted, low-voltage coil insulating barrier is by semi-cylindrical the first sweep being sequentially connected with, cuboid the first straight portion, semi-cylindrical the second sweep, cuboid the second straight portion is constituted, first sweep, first straight portion, second sweep, second straight portion forms the column structure being sealed, there is inside column chamber unshakable in one's determination, first catch element is positioned at outside the first sweep, first catch element is by the first connector, first locking member is constituted, one end of first connector is connected to the outer surface of the first sweep, the other end of the first connector is connected on the first locking member；Second catch element is positioned at outside the first straight portion, and the second catch element is made up of the second connector, the second locking member, and one end of the second connector is connected to the outer surface of the first straight portion, and the other end of the second connector is connected on the second locking member；3rd catch element is positioned at outside the second sweep, and the 3rd catch element is made up of the 3rd connector, the 3rd locking member, and one end of the 3rd connector is connected to the outer surface of the second sweep, and the other end of the 3rd connector is connected on the 3rd locking member；4th catch element is positioned at outside the second straight portion, and the 4th catch element is made up of the 4th connector, the 4th locking member, and one end of the 4th connector is connected to the outer surface of the second straight portion, and the other end of the 4th connector is connected on the 4th locking member；First connector, the second connector, the 3rd connector, the 4th connector are all rectangular shapes, and the first locking member, the second locking member, the 3rd locking member, the 4th locking member are all the cylinder body shapes of truncated part cylinder；First connector is that the plane at the upper surface place from the first sweep extends below more than the plane at lower surface place of the first sweep；Second connector is that the plane at the upper surface place from the first straight portion extends below more than the plane at lower surface place of the first straight portion；3rd connector is that the plane at the upper surface place from the second sweep extends below more than the plane at lower surface place of the second sweep；4th connector is that the plane at the upper surface place from the second straight portion extends below more than the plane at lower surface place of the second straight portion；nullIn the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the first catch element and the axis of symmetry of the 3rd catch element are in a straight line and the center of mistake low-voltage coil，The axis of symmetry of the second catch element and the axis of symmetry of the 4th catch element in a straight line and cross low-voltage coil center，The axis of symmetry of the first catch element and the axis of symmetry of the second catch element are perpendicular，First locking member and the first connector connection，The width of the first connector is less than the diameter of a circle at the first locking member place，Second locking member and the second connector connection，The width of the second connector is less than the diameter of a circle at the second locking member place，3rd locking member and the 3rd connector connection，The width of the 3rd connector is less than the diameter of a circle at the 3rd locking member place，4th locking member and the 4th connector connection，The width of the 4th connector is less than the diameter of a circle at the 4th locking member place；Described first catch element, the second catch element, the 3rd catch element and the 4th catch element are all segmentation structure, and each catch element is at least divided into two sections.
3. for the high-tension coil of dry-type transformer, include high voltage ring skeleton, close be wound on high voltage ring skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, high-tension insulating bushing, high-voltage terminal row, high-voltage coil insulation layer that high voltage ring skeleton, enamel-covered wire, magnet wire insulation layer cladding are got up；It is characterized in that, described high-voltage coil insulation layer is by semi-cylindrical the 3rd sweep being sequentially connected with, cuboid the 3rd straight portion, semi-cylindrical the 4th sweep, cuboid the 4th straight portion is constituted, 3rd sweep, 3rd straight portion, 4th sweep, 4th straight portion forms the column structure being sealed, there is inside column appearance low-voltage coil chamber, inside 3rd sweep, there is the first buckling groove, the opening of the first buckling groove is positioned at the inner surface of the 3rd sweep, first buckling groove is extended to the plane at the lower surface place of the 3rd sweep by the plane at the upper surface place of the 3rd sweep；Having the second buckling groove inside 3rd straight portion, the opening of the second buckling groove is positioned at the inner surface of the 3rd straight portion, and the second buckling groove is extended to the plane at the lower surface place of the 3rd straight portion by the plane at the upper surface place of the 3rd straight portion；Having the 3rd buckling groove inside 4th sweep, the opening of the 3rd buckling groove is positioned at the inner surface of the 4th sweep, and the 3rd buckling groove is extended to the plane at the lower surface place of the 4th sweep by the plane at the upper surface place of the 4th sweep；4th straight partial interior has the 4th buckling groove, and the opening of the 4th buckling groove is positioned at the inner surface of the 4th straight portion, and the 4th buckling groove is extended to the plane at the lower surface place of the 4th straight portion by the plane at the upper surface place of the 4th straight portion；First buckling groove, the second buckling groove, the 3rd buckling groove, the 4th buckling groove are all the cylinder body shapes of truncated part cylinder；In the orthographic projection of the plane of any one axis perpendicular with high-tension coil: the axis of symmetry of the first buckling groove and the axis of symmetry of the 3rd buckling groove are in a straight line and the center of mistake high-tension coil, the axis of symmetry of the second buckling groove and the axis of symmetry of the 4th buckling groove in a straight line and cross high-tension coil center, the axis of symmetry of the first buckling groove and the axis of symmetry of the second buckling groove are perpendicular；The diameter of a circle at the first locking member place is less than the diameter of a circle at the first buckling groove place, the diameter of a circle at the second locking member place is less than the diameter of a circle at the second buckling groove place, the diameter of a circle at the 3rd locking member place is less than the diameter of a circle at the 3rd buckling groove place, and the diameter of a circle at the 4th locking member place is less than the diameter of a circle at the 4th buckling groove place；Described first buckling groove, the second buckling groove, the 3rd buckling groove, the curved portion of cross section of the 4th buckling groove are all the circular arcs of more than 2/3.
4. for the low-voltage coil of dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, low-voltage coil insulating barrier that low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding are got up；nullIt is characterized in that，Described low-voltage coil is by low-voltage coil insulating barrier and the first catch element outside being positioned at low-voltage coil insulating barrier、3rd catch element is constituted，Low-voltage coil insulating barrier is by semi-cylindrical the first sweep being sequentially connected with、Cuboid the first straight portion、Semi-cylindrical the second sweep、Cuboid the second straight portion is constituted，First sweep、First straight portion、Second sweep、Second straight portion forms the column structure being sealed，There is inside column chamber unshakable in one's determination，First catch element is positioned at outside the first sweep，First catch element is by the first connector、First locking member is constituted，One end of first connector is connected to the outer surface of the first sweep，The other end of the first connector is connected on the first locking member，First connector is extended to the plane at the lower surface place of the first sweep by the plane at the upper surface place of the first sweep；3rd catch element is positioned at outside the second sweep, 3rd catch element is made up of the 3rd connector, the 3rd locking member, one end of 3rd connector is connected to the outer surface of the second sweep, the other end of the 3rd connector is connected on the 3rd locking member, and the 3rd connector is extended to the plane at the lower surface place of the second sweep by the plane at the upper surface place of the second sweep；First connector, the 3rd connector both of which are rectangular shapes, and the first locking member, the 3rd locking member both of which are the cylinder body shapes of truncated part cylinder；In the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the first catch element and the axis of symmetry of the 3rd catch element are in a straight line and the center of mistake low-voltage coil, first locking member and the first connector connection, the width of the first connector is less than the diameter of a circle at the first locking member place, 3rd locking member and the 3rd connector connection, the width of the 3rd connector is less than the diameter of a circle at the 3rd locking member place.
5. for the low-voltage coil of dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, low-voltage coil insulating barrier that low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding are got up；nullIt is characterized in that，Described low-voltage coil is by low-voltage coil insulating barrier and the second catch element outside being positioned at low-voltage coil insulating barrier、4th catch element is constituted，Low-voltage coil insulating barrier is by semi-cylindrical the first sweep being sequentially connected with、Cuboid the first straight portion、Semi-cylindrical the second sweep、Cuboid the second straight portion is constituted，First sweep、First straight portion、Second sweep、Second straight portion forms the column structure being sealed，There is inside column chamber unshakable in one's determination，Second catch element is positioned at outside the first straight portion，Second catch element is by the second connector、Second locking member is constituted，One end of second connector is connected to the outer surface of the first straight portion，The other end of the second connector is connected on the second locking member，Second connector is extended to the plane at the lower surface place of the first straight portion by the plane at the upper surface place of the first straight portion；4th catch element is positioned at outside the second straight portion, 4th catch element is made up of the 4th connector, the 4th locking member, one end of 4th connector is connected to the outer surface of the second straight portion, the other end of the 4th connector is connected on the 4th locking member, and the 4th connector is extended to the plane at the lower surface place of the second straight portion by the plane at the upper surface place of the second straight portion；Second connector, the 4th connector both of which are rectangular shapes, and the second locking member, the 4th locking member both of which are the cylinder body shapes of truncated part cylinder；In the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the second catch element and the axis of symmetry of the 4th catch element are in a straight line and the center of mistake low-voltage coil, second locking member and the second connector connection, the width of the second connector is less than the diameter of a circle at the second locking member place, 4th locking member and the 4th connector connection, the width of the 4th connector is less than the diameter of a circle at the 4th locking member place.
6. for the low-voltage coil of dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, low-voltage coil insulating barrier that low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding are got up；nullIt is characterized in that，Described low-voltage coil is by low-voltage coil insulating barrier and the second catch element outside being positioned at low-voltage coil insulating barrier、3rd catch element and the 4th catch element are constituted，Low-voltage coil body is by semi-cylindrical the first sweep being sequentially connected with、Cuboid the first straight portion、Semi-cylindrical the second sweep、Cuboid the second straight portion is constituted，First sweep、First straight portion、Second sweep、Second straight portion forms the column structure being sealed，There is inside column chamber unshakable in one's determination，Second catch element is positioned at outside the first straight portion，Second catch element is by the second connector、Second locking member is constituted，One end of second connector is connected to the outer surface of the first straight portion，The other end of the second connector is connected on the second locking member，Second connector is extended to the plane at the lower surface place of the first straight portion by the plane at the upper surface place of the first straight portion；3rd catch element is positioned at outside the second sweep, 3rd catch element is made up of the 3rd connector, the 3rd locking member, one end of 3rd connector is connected to the outer surface of the second sweep, the other end of the 3rd connector is connected on the 3rd locking member, and the 3rd connector is extended to the plane at the lower surface place of the second sweep by the plane at the upper surface place of the second sweep；4th catch element is positioned at outside the second straight portion, 4th catch element is made up of the 4th connector, the 4th locking member, one end of 4th connector is connected to the outer surface of the second straight portion, the other end of the 4th connector is connected on the 4th locking member, and the 4th connector is extended to the plane at the lower surface place of the second straight portion by the plane at the upper surface place of the second straight portion；Second connector, the 3rd connector, the 4th connector three are rectangular shapes, and the second locking member, the 3rd locking member, the 4th locking member three are the cylinder body shapes of truncated part cylinder；In the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the second catch element and the axis of symmetry of the 4th catch element are in a straight line and the center of mistake low-voltage coil, second locking member and the second connector connection, the width of the second connector is less than the diameter of a circle at the second locking member place, 3rd locking member and the 3rd connector connection, the width of the 3rd connector is less than the diameter of a circle at the 3rd locking member place, 4th locking member and the 4th connector connection, the width of the 4th connector is less than the diameter of a circle at the 4th locking member place.
7. for the low-voltage coil of dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, low-voltage coil insulating barrier that low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding are got up；nullIt is characterized in that，Described low-voltage coil is by low-voltage coil insulating barrier and the first catch element outside being positioned at low-voltage coil insulating barrier、3rd catch element and the 4th catch element are constituted，Low-voltage coil body is by semi-cylindrical the first sweep being sequentially connected with、Cuboid the first straight portion、Semi-cylindrical the second sweep、Cuboid the second straight portion is constituted，First sweep、First straight portion、Second sweep、Second straight portion forms the column structure being sealed，There is inside column chamber unshakable in one's determination，First catch element is positioned at outside the first sweep，First catch element is by the first connector、First locking member is constituted，One end of first connector is connected to the outer surface of the first sweep，The other end of the first connector is connected on the first locking member，First connector is extended to the plane at the lower surface place of the first sweep by the plane at the upper surface place of the first sweep；3rd catch element is positioned at outside the second sweep, 3rd catch element is made up of the 3rd connector, the 3rd locking member, one end of 3rd connector is connected to the outer surface of the second sweep, the other end of the 3rd connector is connected on the 3rd locking member, and the 3rd connector is extended to the plane at the lower surface place of the second sweep by the plane at the upper surface place of the second sweep；4th catch element is positioned at outside the second straight portion, 4th catch element is made up of the 4th connector, the 4th locking member, one end of 4th connector is connected to the outer surface of the second straight portion, the other end of the 4th connector is connected on the 4th locking member, and the 4th connector is extended to the plane at the lower surface place of the second straight portion by the plane at the upper surface place of the second straight portion；First connector, the 3rd connector, the 4th connector three are rectangular shapes, and the first locking member, the 3rd locking member, the 4th locking member three are the cylinder body shapes of truncated part cylinder；In the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the first catch element and the axis of symmetry of the 3rd catch element are in a straight line and the center of mistake low-voltage coil, the axis of symmetry of the 4th catch element crosses the center of low-voltage coil, the axis of symmetry of the first catch element and the axis of symmetry of the 4th catch element are perpendicular, first locking member and the first connector connection, the width of the first connector is less than the diameter of a circle at the first locking member place, 3rd locking member and the 3rd connector connection, the width of the 3rd connector is less than the diameter of a circle at the 3rd locking member place, 4th locking member and the 4th connector connection, the width of the 4th connector is less than the diameter of a circle at the 4th locking member place.
8. for the low-voltage coil of dry-type transformer, include low-voltage coil skeleton, close be wound on low-voltage coil skeleton enamel-covered wire, the magnet wire insulation layer that enamel-covered wire is kept apart, low-voltage insulation sleeve pipe, low-pressure line-outgoing row, low-voltage coil insulating barrier that low-voltage coil skeleton, enamel-covered wire, magnet wire insulation layer cladding are got up；nullIt is characterized in that，Described low-voltage coil is by low-voltage coil insulating barrier and the first catch element outside being positioned at low-voltage coil insulating barrier、Second catch element、3rd catch element and the 4th catch element are constituted，Low-voltage coil body is by semi-cylindrical the first sweep being sequentially connected with、Cuboid the first straight portion、Semi-cylindrical the second sweep、Cuboid the second straight portion is constituted，First sweep、First straight portion、Second sweep、Second straight portion forms the column structure being sealed，There is inside column chamber unshakable in one's determination，First catch element is positioned at outside the first sweep，First catch element is by the first connector、First locking member is constituted，One end of first connector is connected to the outer surface of the first sweep，The other end of the first connector is connected on the first locking member，First connector is that the plane at the upper surface place from the first sweep extends below more than the plane at lower surface place of the first sweep；Second catch element is positioned at outside the first straight portion, second catch element is made up of the second connector, the second locking member, one end of second connector is connected to the outer surface of the first straight portion, the other end of the second connector is connected on the second locking member, and the second connector is that the plane at the upper surface place from the first straight portion extends below more than the plane at lower surface place of the first straight portion；3rd catch element is positioned at outside the second sweep, 3rd catch element is made up of the 3rd connector, the 3rd locking member, one end of 3rd connector is connected to the outer surface of the second sweep, the other end of the 3rd connector is connected on the 3rd locking member, and the 3rd connector is that the plane at the upper surface place from the second sweep extends below more than the plane at lower surface place of the second sweep；4th catch element is positioned at outside the second straight portion, 4th catch element is made up of the 4th connector, the 4th locking member, one end of 4th connector is connected to the outer surface of the second straight portion, the other end of the 4th connector is connected on the 4th locking member, and the 4th connector is that the plane at the upper surface place from the second straight portion extends below more than the plane at lower surface place of the second straight portion；First connector, the second connector, the 3rd connector, the 4th connector are all rectangular shapes, and the first locking member, the second locking member, the 3rd locking member, the 4th locking member are all the cylinder body shapes of truncated part cylinder；nullIn the orthographic projection of the plane of any one axis perpendicular with low-voltage coil: the axis of symmetry of the first catch element and the axis of symmetry of the 3rd catch element are in a straight line and the center of mistake low-voltage coil，The axis of symmetry of the second catch element and the axis of symmetry of the 4th catch element in a straight line and cross low-voltage coil center，The axis of symmetry of the first catch element and the axis of symmetry of the second catch element are perpendicular，First locking member and the first connector connection，The width of the first connector is less than the diameter of a circle at the first locking member place，Second locking member and the second connector connection，The width of the second connector is less than the diameter of a circle at the second locking member place，3rd locking member and the 3rd connector connection，The width of the 3rd connector is less than the diameter of a circle at the 3rd locking member place，4th locking member and the 4th connector connection，The width of the 4th connector is less than the diameter of a circle at the 4th locking member place；Described first catch element, the second catch element, the 3rd catch element, the 4th catch element are all segmentation structure and are the most at least divided into two sections.
9. according to a kind of low-voltage coil for dry-type transformer described in claim 1 or claim 2, claim 4 to claim 8 any one, it is characterised in that described first catch element, the second catch element, the 3rd catch element, the material of the 4th catch element are all high-temperature resistance plastice or pottery.
10. according to a kind of low-voltage coil for dry-type transformer described in claim 1 or claim 2, claim 4 to claim 8 any one, it is characterised in that described first catch element, the second catch element, the 3rd catch element, the material of the 4th catch element are all politef or organosilane crosslinked polyethylene.
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| CN201610402092.5A CN105826052A (en) | 2016-06-09 | 2016-06-09 | Low-voltage coil and high-voltage coil for dry-type transformer |
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| CN201610402092.5A CN105826052A (en) | 2016-06-09 | 2016-06-09 | Low-voltage coil and high-voltage coil for dry-type transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112562991A (en) * | 2020-11-04 | 2021-03-26 | 广东电网有限责任公司 | Heat radiator for dry-type transformer coil |
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| CN201616329U (en) * | 2009-12-18 | 2010-10-27 | 中电电气集团有限公司 | Transformer body |
| CN201838442U (en) * | 2010-10-09 | 2011-05-18 | 德州天宇汽车电子有限公司 | Double-skeleton epoxy potting transformer |
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| CN2426636Y (en) * | 2000-06-15 | 2001-04-11 | 济南第二变压器厂 | Open ventilating dry type power transformer |
| CN101521095A (en) * | 2008-11-20 | 2009-09-02 | 武汉长江通信产业集团股份有限公司 | High frequency switching mode power supply transformer |
| CN101819864A (en) * | 2009-02-26 | 2010-09-01 | 三星电机株式会社 | Transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112562991A (en) * | 2020-11-04 | 2021-03-26 | 广东电网有限责任公司 | Heat radiator for dry-type transformer coil |
| CN112562991B (en) * | 2020-11-04 | 2022-03-04 | 广东电网有限责任公司 | Heat radiator for dry-type transformer coil |
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Application publication date: 20160803 |