EP1952407A1 - Mica-reinforced insulation - Google Patents
Mica-reinforced insulationInfo
- Publication number
- EP1952407A1 EP1952407A1 EP06793986A EP06793986A EP1952407A1 EP 1952407 A1 EP1952407 A1 EP 1952407A1 EP 06793986 A EP06793986 A EP 06793986A EP 06793986 A EP06793986 A EP 06793986A EP 1952407 A1 EP1952407 A1 EP 1952407A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mica
- tube
- insulating tube
- carrier
- hose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
Definitions
- the invention relates to a mica-reinforced insulating tube for the isolation of electrical contact connections.
- Electrical contact connections of electrical equipment, eg. B between coils of electrical machines or transformers are to be insulated against each other and against ground potential, in particular at rated voltages of more than 1 kV. This is followed, in particular for electrical equipment in the rated voltage range from 1 KV insulation of the contact connections by manual wrapping with Glim- merb skilledn.
- JP 1160339 A2 discloses a microfluidic tube which has a plurality of layers, wherein the inner layer consists of strips containing mica and is followed by a resin coating which is surrounded by a heat-shrinkable tube.
- the object of the invention to provide for contact connections in particular for electrical equipment with rated voltages above 1 KV insulation, which are easy to manufacture and have low wall thicknesses. Furthermore, the insulation should be flexible, so that corresponding contact connections can also be isolated with sufficient electrical strength.
- the solution of the problem is also achieved by a method for producing a mica reinforced insulating hose characterized by the following steps: - A carrier hose is expanded by compressed air and / or a mandrel to a desired inner diameter, - a mica tape is located around in this state
- Braided carrier hose - The overlap and / or the number of layers of mica tape is adjustable.
- This mica reinforced insulation according to the invention is characterized by a layered structure which, according to the invention, is characterized by a carrier tube and mica materials located thereon.
- a mica bandage By means of single-layer or multi-layer layers of a mica bandage with adjustable overlapping, the electrical strength or the partial discharge resistance can be adapted to the respective voltage requirements. These are the rated voltage stresses as well as the expected over-voltage effects in inverter operation of electrical machines or due to overvoltages due to network anomalies, e.g. Lightning strike or traveling wave effects on electrical wires and cables.
- the layered construction can be carried out, for example, by braiding a fabric tube, which is braided, knitted or embroidered, with a coating of mica tape. Furthermore, continuous one-piece hoses with a coating of PU, acrylate or silicone with a mica tape can also be wrapped around in order to obtain a mica reinforced insulating hose for the insulation of electrical contact connections.
- Mica is an inorganic insulating material and has comparatively very good electrical insulation and heat properties. In addition, a very good creepage and puncture resistance.
- the electricity constant ⁇ r is between 5 and 8.
- a mica tape has small pieces of mica, which are glued with a binder and pressed under the action of heat.
- the density of mica pieces directly affects the electrical insulation properties.
- this porous mica tape on an accelerator, which thereby favors the curing of the impregnating resin in the carrier tube.
- mica reinforced insulating hose is provided with a mechanical protection of a fiber braid, which may be a glass or plastic fiber.
- the inventive mica-reinforced insulating tube is produced in a preferred embodiment by the following steps: by compressed air and / or by a mandrel, the carrier tube is brought to the desired inner diameter, and in this state surrounded by a mica tape.
- these two or three operations, producing the carrier tube with subsequent rewinding of the mica tape and possibly applying a mechanical see protective tube or protective braid can be performed by a device or a work process.
- the mica content increases the electrical strength and the partial discharge resistance of the insulation even with a small wall thickness than unreinforced lacquered or extruded insulating hoses.
- the mechanical strength and flexibility over conventional rolled mica tape rolls or tubes is e.g. significantly increased by the tissue reinforcement of the carrier tube. This also prevents a shift of the layers of mica tape, especially in the assembly of other parts, so that the electrical resistance of the electrical equipment can be guaranteed.
- contacts in the rated voltage range above 1 kV can also be made resistant to partial discharges in a simple manner.
- these hoses, which are now formed, are pushed over the respective location to be insulated in the case of the respective electrical equipment, such as electrical machines, converters, or transformers, without having to fear that the existing layers of the insulation will change their position.
- the insulation is thus applied before the final shaping of the contact connection and withstands the mechanical stresses in this shaping.
- the figure shows a section of an inventive insulation tube 1, the base of which forms a braided glass tube which is designed as a carrier tube 2.
- This braided glass tube 2 is surrounded by a jacket 3, for example, LSR (liquid silicone rubber).
- This jacket 3 is constructed, for example, from liquid silicone rubber.
- This arrangement is now surrounded by a mica tape 4, which results in a mica layer defined layer thickness by a predetermined number of layers and / or a predetermined overlap of the individual layers.
- the respective glimmer bands 4 advantageously have a respectively defined layer thickness and / or layer width.
- a PET (poly-ethylene terrevalate) fiber braid 5 is suitable.
- the preparation takes place in a correspondingly designed device, which can apply the individual layers defined.
- the manufacturing steps are performed in a device.
- knitted or knitted carrier hose 2 made of glass or synthetic fibers is brought to the desired inner diameter, for example by compressed air.
- the carrier hose 2 can also be applied to a correspondingly dimensioned mandrel.
- the carrier tube 2 is provided before the next step with a jacket 3 made of PU, acrylate or silicone.
- the mica tape 4 is porous and advantageously contains an accelerator, in order thereby to favor the hardening of a potion resin in the carrier hose 2.
- the mica portion of the carrier hose 2 is varied in sections and thus adjusted in a predeterminable manner.
- a mechanical protection of the glim- merbandumsponnene carrier hose 2 is provided with a fiber mesh 5 made of glass or plastic fibers in an advantageous manner.
- the mica content increases the electrical strength and the partial charge resistance of the insulating tube 1 with respect to painted or extruded relatively low wall thickness.
- the mechanical strength and flexibility over conventional rolled mica tape rolls or tubes is among other things by the fabric reinforcement of the carrier tube 2 compared to other insulating tubes significantly increased.
- the inventive mica reinforced insulating tube 1 has at least one of a mica tape 4 braided carrier hose 2.
- a sheath 3 and / or a fiber braid 5 are provided.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005055290A DE102005055290B3 (en) | 2005-11-21 | 2005-11-21 | Mica-strengthened insulating tubing for electrical contact connections and electrical machine and production processes has fiber textile tube with mica layer or multi-layer |
PCT/EP2006/067141 WO2007057251A1 (en) | 2005-11-21 | 2006-10-06 | Mica-reinforced insulation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1952407A1 true EP1952407A1 (en) | 2008-08-06 |
EP1952407B1 EP1952407B1 (en) | 2009-02-25 |
Family
ID=37492452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06793986A Not-in-force EP1952407B1 (en) | 2005-11-21 | 2006-10-06 | Mica-reinforced insulation |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080286505A1 (en) |
EP (1) | EP1952407B1 (en) |
CN (1) | CN101313369B (en) |
AT (1) | ATE424029T1 (en) |
BR (1) | BRPI0618803B1 (en) |
DE (2) | DE102005055290B3 (en) |
WO (1) | WO2007057251A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2824801A1 (en) | 2013-07-12 | 2015-01-14 | Siemens Aktiengesellschaft | Method for the production of a dynamo-electric rotational machine and dynamo-electric rotational machine |
EP2874280A1 (en) | 2013-11-14 | 2015-05-20 | Siemens Aktiengesellschaft | Groove closure mass, groove closure and method for producing a groove closure |
US10354779B2 (en) * | 2017-03-31 | 2019-07-16 | Radix Wire & Cable, Llc | Free air fire alarm cable |
WO2020180554A1 (en) * | 2019-03-01 | 2020-09-10 | Milwaukee Electric Tool Corporation | Power tool and battery pack for use with the same |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2772696A (en) * | 1953-04-21 | 1956-12-04 | Westinghouse Electric Corp | Flexible resin bonded mica members |
US3823255A (en) * | 1972-04-20 | 1974-07-09 | Cyprus Mines Corp | Flame and radiation resistant cable |
US4607851A (en) * | 1977-11-30 | 1986-08-26 | Metex Corporation | Method of making composite wire mesh seal |
FR2573910B1 (en) * | 1984-11-29 | 1987-06-19 | Habia Cable | FLEXIBLE FIRE RESISTANT INSULATION COATING FOR ELECTRICAL CONDUITS, WIRES AND CABLES |
DE3514879A1 (en) * | 1985-04-04 | 1986-10-09 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | METHOD FOR REDUCING WATER VAPOR DIFFUSION IN A MULTIPLE LAYER PLASTIC COMPOSITE INSULATOR |
JPS62154505A (en) * | 1985-12-26 | 1987-07-09 | アクソン・カーブル・エス・アー | Fire resistant flexible insulating covering for pipe, wire, cable and optical fiber |
JPH01160339A (en) * | 1987-12-17 | 1989-06-23 | Toshiba Corp | Manufacture of insulated coil for rotary electric machine |
US5144739A (en) * | 1991-06-26 | 1992-09-08 | General Electric Company | Method of establishing a leakage current path for a commutator |
DE4244298C2 (en) * | 1992-12-28 | 2003-02-27 | Alstom | Electrical tape and process for its manufacture |
DE4434825A1 (en) * | 1994-09-29 | 1996-05-23 | Tissu Rothrist Ag | Flat composite material |
-
2005
- 2005-11-21 DE DE102005055290A patent/DE102005055290B3/en not_active Expired - Fee Related
-
2006
- 2006-10-06 WO PCT/EP2006/067141 patent/WO2007057251A1/en active Application Filing
- 2006-10-06 EP EP06793986A patent/EP1952407B1/en not_active Not-in-force
- 2006-10-06 US US12/094,382 patent/US20080286505A1/en not_active Abandoned
- 2006-10-06 BR BRPI0618803-6A patent/BRPI0618803B1/en not_active IP Right Cessation
- 2006-10-06 AT AT06793986T patent/ATE424029T1/en not_active IP Right Cessation
- 2006-10-06 CN CN2006800432831A patent/CN101313369B/en not_active Expired - Fee Related
- 2006-10-06 DE DE502006002980T patent/DE502006002980D1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007057251A1 * |
Also Published As
Publication number | Publication date |
---|---|
BRPI0618803A2 (en) | 2011-09-13 |
US20080286505A1 (en) | 2008-11-20 |
WO2007057251A1 (en) | 2007-05-24 |
BRPI0618803B1 (en) | 2018-01-23 |
CN101313369B (en) | 2011-11-23 |
ATE424029T1 (en) | 2009-03-15 |
EP1952407B1 (en) | 2009-02-25 |
DE102005055290B3 (en) | 2007-05-03 |
CN101313369A (en) | 2008-11-26 |
DE502006002980D1 (en) | 2009-04-09 |
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