CN103594150A - PET film insulation winding wire for transformer and production method - Google Patents
PET film insulation winding wire for transformer and production method Download PDFInfo
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- CN103594150A CN103594150A CN201310574544.4A CN201310574544A CN103594150A CN 103594150 A CN103594150 A CN 103594150A CN 201310574544 A CN201310574544 A CN 201310574544A CN 103594150 A CN103594150 A CN 103594150A
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- polyester film
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- pet polyester
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Abstract
The invention relates to a PET film insulation winding wire for a transformer and a production method, and belongs to the technical field of transformer winding wires. According to the technical scheme, a PET film (2) wraps an outer layer of a bare copper strap wire (1) and is made of polyethylene glycol terephthalate with the extrusion method, then two-way stretching is carried out to form the PET film (2), when the plastic elongation rate of the bare copper strap wire is 0.2%, the stress RP0n2 of the bare copper strap wire (1) is 240-260Mpa, the resistivity rate is smaller than 0.017241 omega mm<2>/m, and the elongation rate is higher than 18%. The insulation winding wire is produced, the positive pressure state is kept, an anti-static facility is provided, and internal gas is moist and clean. According to the PET film insulation winding wire and the production method, the PET film is prevented from absorbing dust, and high cleanness of the PET film is guaranteed. As a transformer coil runs in a non-oil-soaking environment, the clean production environment guarantees that an electromagnetic wire has the good anti-explosion performance and insulating performance. The PET film meets various chemical and physical property requirements in transformer use, and can be easily maintained and detected in the gas insulation transformer.
Description
Technical field
The present invention relates to PET polyester film insulated winding wire and production method for a kind of transformer, for making Transformer Winding, belong to Transformer Winding lead technology field.
Background technology
PET polyester film is called for short PET film, is to take PETG as raw material, adopts extrusion molding to make sheet, then the thin-film material of making through biaxial tension.Because PET polyester film has adsorptivity, in production process, easily adsorb impurity in process of production, affect properties of product.Gas transformer is high to the cleanliness factor requirement of the winding that insulate, and the yield strength of insulation winding is higher, and Short Circuit withstand impact capacity is just stronger, to the polyester film insulation heat dispersion of winding and the research and development of electric property, manufacture, improves extremely urgent.Because Transformer Winding coil moves in non-oil immersion environment, the winding wire that background technology is produced can not meet the requirement of Transformer Winding.
Summary of the invention
The object of the invention is to provide PET polyester film insulated winding wire and production method for a kind of transformer, during production, in subenvironment, keep barotropic state, add antistatic facility, guarantee that internal gas is moistening, clean, not contaminated, prevent PET polyester film absorption micronic dust, guarantee PET polyester film high-cleanness; Solve the problem existing in background technology.
Technical scheme of the present invention is:
PET polyester film insulated winding wire for a kind of transformer, PET polyester film is coated outer in bare copper flat wire, described PET polyester film is to take PETG as raw material, employing extrusion molding is made, through biaxial tension, become PET polyester film again, the stress R when plastic elongation rate of bare copper flat wire is 0.2%
p0.2for 240-260Mpa, and resistivity is less than 0.017241 Ω mm
2/ m, percentage elongation is greater than 18%.
Described bare copper flat wire, adopts the rear drawing process of first extruding to make, and has increased substantially the yield strength of conductor.
A production method for PET polyester film insulated winding wire for transformer, comprises following processing step: 1. use the method for the first rear drawing of extruding to produce bare copper flat wire, the stress R when plastic elongation rate of bare copper flat wire is 0.2%
p0.2reach 240-260Mpa, and resistivity is less than 0.017241 Ω mm
2/ m, percentage elongation is greater than 18%; 2. take PETG as raw material, adopt extrusion molding to make thicker sheet, thicker sheet is become to thinner PET polyester film through biaxial tension; 3. bare copper flat wire and PET polyester film enter confined space, carry out insulated winding wire production, this confined space keeps barotropic state, and keep non-moving air not circulate, be provided with antistatic facility, internal gas is moistening, clean, not contaminated, and dustfall content is less than 1 μ g/cm2, relative air humidity 60%-80%; 4. PET polyester film is coated outer in bare copper flat wire, produces PET polyester film insulated winding wire for transformer, carries out rolling on take-up reel, becomes finished product.
The invention has the beneficial effects as follows: the present invention prevents PET polyester film absorption micronic dust, guarantees PET polyester film high-cleanness, and because transformer coil moves in non-oil immersion environment, clean production environment has guaranteed that electromagnetic wire has good explosion-proof and insulating properties.Chemistry, physical property that PET polyester film meets in every transformer use require and are easy to maintenance test in gas-insulated transformer.
Accompanying drawing explanation
Fig. 1 is product cross section schematic diagram of the present invention;
In figure: 1, bare copper flat wire; 2, PET polyester film; 3, chamfering.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described.
PET polyester film insulated winding wire for a kind of transformer, PET polyester film 2 is coated in bare copper flat wire 1 skin, described PET polyester film is to take PETG as raw material, employing extrusion molding is made, through biaxial tension, become PET polyester film again, the stress R when plastic elongation rate of bare copper flat wire is 0.2%
p0.2for 240-260Mpa, and resistivity is less than 0.017241 Ω mm
2/ m, percentage elongation is greater than 18%.
Described bare copper flat wire, adopts the rear drawing process of first extruding to make, and has increased substantially the yield strength of conductor.
Execution mode more specifically:
1) according to PET polyester film insulated winding wire manufacturing requirements for transformer, determine the specification of insulated winding wire, use the mode of the first rear drawing of extruding to produce bare copper flat wire; Take PETG as raw material, adopt extrusion molding to make thicker sheet, thicker sheet is become to thinner PET polyester film through biaxial tension;
2) bare copper flat wire and PET polyester film enter confined space, carry out insulated winding wire production, and this confined space keeps barotropic state, be provided with antistatic facility, internal gas is moistening, clean, not contaminated, and dustfall content is less than 1 μ g/cm2, relative air humidity 60%-80%;
3) production scene is a seal cavity, in confined space, be full of clean moistening air, and keep non-moving air not circulate, when operating, producers must wear Special dustproof work clothes, after Airshower chamber, enter seal cavity, do not allow random discrepancy, guarantee positive pressure environment and the high cleanliness of production scene; Antistatic erection of equipment is in inside, and an earth connection, if having small dust or foreign matter all can be adsorbed by antistatic facility on PET polyester film; Thereby greatly improved the cleannes of PET polyester film insulation winding, guaranteed the performance of winding wire;
4) PET polyester film is coated outer in bare copper flat wire, produces PET polyester film insulated winding wire for transformer, carries out rolling on take-up reel, becomes finished product.
Claims (3)
1. PET polyester film insulated winding wire for a transformer, it is characterized in that: PET polyester film (2) is coated in bare copper flat wire (1) skin, described PET polyester film is to take PETG as raw material, employing extrusion molding is made, through biaxial tension, become PET polyester film again, the stress R when plastic elongation rate of bare copper flat wire is 0.2%
p0.2for 240-260Mpa, and resistivity is less than 0.017241 Ω mm
2/ m, percentage elongation is greater than 18%.
2. PET polyester film insulated winding wire for a kind of transformer according to claim 1, is characterized in that described bare copper flat wire, adopts the rear drawing process of first extruding to make.
3. a production method for PET polyester film insulated winding wire for transformer, is characterized in that comprising following processing step: 1. use the method for the first rear drawing of extruding to produce bare copper flat wire, stress R when bare copper flat wire plastic elongation rate is 0.2%
p0.2reach 240-260Mpa, and resistivity is less than 0.017241 Ω mm
2/ m, percentage elongation is greater than 18%; 2. take PETG as raw material, adopt extrusion molding to make thicker sheet, thicker sheet is become to thinner PET polyester film through biaxial tension; 3. bare copper flat wire and PET polyester film enter confined space, carry out insulated winding wire production, this confined space keeps barotropic state, and keep non-moving air not circulate, be provided with antistatic facility, internal gas is moistening, clean, not contaminated, and dustfall content is less than 1 μ g/cm2, relative air humidity 60%-80%; 4. PET polyester film is coated outer in bare copper flat wire, produces PET polyester film insulated winding wire for transformer, carries out rolling on take-up reel, becomes finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310574544.4A CN103594150B (en) | 2013-11-18 | 2013-11-18 | A kind of production method of transformer PET polyester film insulated winding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310574544.4A CN103594150B (en) | 2013-11-18 | 2013-11-18 | A kind of production method of transformer PET polyester film insulated winding wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103594150A true CN103594150A (en) | 2014-02-19 |
| CN103594150B CN103594150B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310574544.4A Active CN103594150B (en) | 2013-11-18 | 2013-11-18 | A kind of production method of transformer PET polyester film insulated winding wire |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003045239A (en) * | 2001-08-03 | 2003-02-14 | Hitachi Cable Ltd | Horizontal coil |
| CN101692355A (en) * | 2009-06-03 | 2010-04-07 | 无锡锡洲电磁线有限公司 | New paperless insulation self-adhesive acetal enamelled copper-silver alloy transposed semihard conductor |
| CN102915791A (en) * | 2012-11-01 | 2013-02-06 | 无锡统力电工有限公司 | Winding wire for SF6 gas insulated transformer |
-
2013
- 2013-11-18 CN CN201310574544.4A patent/CN103594150B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003045239A (en) * | 2001-08-03 | 2003-02-14 | Hitachi Cable Ltd | Horizontal coil |
| CN101692355A (en) * | 2009-06-03 | 2010-04-07 | 无锡锡洲电磁线有限公司 | New paperless insulation self-adhesive acetal enamelled copper-silver alloy transposed semihard conductor |
| CN102915791A (en) * | 2012-11-01 | 2013-02-06 | 无锡统力电工有限公司 | Winding wire for SF6 gas insulated transformer |
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| Publication number | Publication date |
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| CN103594150B (en) | 2016-03-23 |
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