EP1952407B1 - Isolation renforcée en mica - Google Patents

Isolation renforcée en mica Download PDF

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Publication number
EP1952407B1
EP1952407B1 EP06793986A EP06793986A EP1952407B1 EP 1952407 B1 EP1952407 B1 EP 1952407B1 EP 06793986 A EP06793986 A EP 06793986A EP 06793986 A EP06793986 A EP 06793986A EP 1952407 B1 EP1952407 B1 EP 1952407B1
Authority
EP
European Patent Office
Prior art keywords
mica
sleeve
electrical
insulation
mount
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.)
Not-in-force
Application number
EP06793986A
Other languages
German (de)
English (en)
Other versions
EP1952407A1 (fr
Inventor
Bernhard Klaussner
Willi Lutz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1952407A1 publication Critical patent/EP1952407A1/fr
Application granted granted Critical
Publication of EP1952407B1 publication Critical patent/EP1952407B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 e.g. between coils of electrical machines or transformers, in particular at rated voltages of more than 1 kV, it is possible to sufficiently insulate them against each other and against ground potential. This is followed, in particular for electrical equipment in the nominal voltage range from 1 KV insulation of the contact connections by manual wrapping with mica tapes.
  • the manual wrapping can also be done only after the final shaping of the contact connections.
  • a mica-containing tube which has a plurality of layers, wherein the inner layer consists of mica-containing strips 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.
  • a mica reinforced insulating for the isolation of electrical contact connections with a carrier tube having a single or multi-layer surrounding him mica tape, wherein the carrier tube is made of fabric, wherein the fabric is braided or knitted or lace and wherein the Fabric is constructed of glass or synthetic fibers.
  • a mica reinforced insulating for the isolation of electrical contact connection with a carrier tube having a single or multi-layer surrounding him mica tape, said the carrier tube is a closed one-piece tube having a jacket made of PU, acrylate or silicone.
  • This inventive mica reinforced insulation is characterized by a layered structure, which is characterized according to the invention by a carrier tube and mica materials located thereon.
  • a carrier tube By means of single or multilayer 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 both the rated voltage stresses as well as the expected overvoltage 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 laceed, with a coating of mica tape. Furthermore, also continuous so one-piece hoses with a coating of PU, acrylate or silicone with a mica tape are spun around to obtain a mica reinforced insulating tube for the isolation of electrical contact connections.
  • Mica is an inorganic insulating material and has comparatively very good electrical insulation and thermal properties. In addition, a very good creepage and dielectric strength.
  • 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 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 of the carrier tube is brought to the desired inner diameter, and wound in this state with a mica tape.
  • these two or three operations, producing the carrier tube with subsequent rewinding of the mica tape and possibly applying a mechanical 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 in 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 portion of an insulation tube 1 according to the invention, 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 of, for example, LSR (L iquid- S ilicon- R ubber).
  • This jacket 3 is constructed, for example, of 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 mica tapes 4 advantageously have a respectively defined layer thickness and / or layer width.
  • a PET ( P oly- E thylen- T errespalat) -fibre 5 is suitable.
  • interlaced knitted or bobbin carrier tube 2 made of glass or synthetic fibers, e.g. brought by compressed air to the desired inner diameter.
  • the carrier hose 2 can also be applied to a correspondingly sized mandrel.
  • the support tube 2 is provided with a jacket 3 made of PU, acrylate or silicone before the next method step.
  • the mica tape 4 is porous and advantageously contains an accelerator, to thereby promote the curing of a impregnating resin in the carrier tube 2.
  • the amount of mica of the carrier hose 2 is varied in sections and thus adjusted in a predeterminable manner.
  • the mica tape-braided carrier hose 2 is advantageously provided with a fiber braid 5 made of glass or plastic fibers.
  • the mica content increases the electrical strength and the partial charge resistance of the insulating tube 1 with respect to painted or extruded relatively small wall thickness.
  • 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.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Insulating Bodies (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (10)

  1. Tube (1) souple, isolant, renforcé par du mica pour isoler des liaisons de contact électriques, comprenant un tube souple de support, qui a une bande (4) de mica l'entourant suivant une couche ou plusieurs couches, le tube souple de support étant en tissu, le tissu étant tressé ou tricoté ou en dentelle et le tissu étant constitué de verre ou de fibres en matière plastique.
  2. Tube (1) souple, isolant, renforcé par du mica pour isoler des liaisons de contact électriques, comprenant un tube (2) souple de support, qui a une bande (4) de mica l'entourant suivant une couche ou plusieurs couches, le tube (2) souple de support étant un tube souple, fermé, d'un seul tenant, qui a une gaine (3) en PU, en acrylate ou en silicone.
  3. Tube (1) souple, isolant, renforcé par du mica suivant l'une des revendications précédentes,
    caractérisé en ce qu'il y a comme protection mécanique une tresse (5) supplémentaire en fibre de verre ou de matière plastique ou un tube souple.
  4. Procédé de fabrication d'un tube (1) souple, isolant, renforcé par du mica suivant l'une des revendications précédentes,
    caractérisé par les stades suivants :
    - on met un tube (2) de support à un diamètre intérieur souhaité en l'élargissant par de l'air comprimé et/ou par un mandrin,
    - on guipe au moins une bande (4) de mica autour du tube (2) souple de support se trouvant en cet état,
    - le chevauchement et/ou le nombre des couches de la bande (4) de mica sur le tube (2) de support étant réglé.
  5. Procédé de fabrication d'un tube (1) souple, isolant, renforcé par du mica suivant la revendication 4,
    caractérisé en ce que l'on dépose comme protection mécanique sur le tube (2) souple de support guipé par de la bande (4) de mica, supplémentairement, une tresse (5) de fibre de verre ou de matière plastique.
  6. Procédé de fabrication d'un tube (1) souple, isolant, renforcé par du mica suivant la revendication 5,
    caractérisé en ce que l'on imprègne la tresse (5) de fibres de silicone ou de matières analogues.
  7. Utilisation d'un tube (1) souple, isolant suivant l'une des revendications précédentes pour l'isolation renforcée par du mica de contact des composants d'équipements électriques.
  8. Utilisation d'un tube (1) souple, isolant, suivant la revendication 7 pour la mise en contact des composants dans des équipements électriques ayant une tension nominale supérieure à 1kv.
  9. Utilisation d'un isolant renforcé par du mica suivant la revendication 8, dans lequel les équipements électriques sont des changeurs de fréquence, des transformateurs ou des moteurs électriques.
  10. Procédé de production d'un moteur électrique par les stades suivantes :
    - mise en paquet des paquets de tôle de stator et de rotor,
    - insertion des bobines dans le rotor et/ou dans le stator,
    - formation des liaisons de commutation entre des bobines et, le cas échéant, un convertisseur de fréquence, un tube (1) souple, isolant, renforcé par du mica suivant l'une des revendications précédentes étant tiré sur les liaisons de commutation.
EP06793986A 2005-11-21 2006-10-06 Isolation renforcée en mica Not-in-force EP1952407B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005055290A DE102005055290B3 (de) 2005-11-21 2005-11-21 Glimmerverstärkter Isolierschlauch
PCT/EP2006/067141 WO2007057251A1 (fr) 2005-11-21 2006-10-06 Isolation renforcée en mica

Publications (2)

Publication Number Publication Date
EP1952407A1 EP1952407A1 (fr) 2008-08-06
EP1952407B1 true EP1952407B1 (fr) 2009-02-25

Family

ID=37492452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06793986A Not-in-force EP1952407B1 (fr) 2005-11-21 2006-10-06 Isolation renforcée en mica

Country Status (7)

Country Link
US (1) US20080286505A1 (fr)
EP (1) EP1952407B1 (fr)
CN (1) CN101313369B (fr)
AT (1) ATE424029T1 (fr)
BR (1) BRPI0618803B1 (fr)
DE (2) DE102005055290B3 (fr)
WO (1) WO2007057251A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2824801A1 (fr) 2013-07-12 2015-01-14 Siemens Aktiengesellschaft Procédé de fabrication d'une machine rotative dynamoélectrique et machine rotative dynamoélectrique
EP2874280A1 (fr) 2013-11-14 2015-05-20 Siemens Aktiengesellschaft Masse de fermeture à encoche, fermeture à encoche et procédé de fabrication d'une fermeture à encoche
US10354779B2 (en) * 2017-03-31 2019-07-16 Radix Wire & Cable, Llc Free air fire alarm cable
EP3931887A4 (fr) * 2019-03-01 2023-08-30 Milwaukee Electric Tool Corporation Outil électrique et bloc-batterie pour utilisation avec celui-ci

Family Cites Families (10)

* Cited by examiner, † Cited by third party
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 (fr) * 1984-11-29 1987-06-19 Habia Cable Revetement isolant souple resistant au feu pour conduites, fils et cables electriques
DE3514879A1 (de) * 1985-04-04 1986-10-09 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Verfahren zur herabsetzung der wasserdampfdiffusion in einem aus mehreren schichten bestehenden kunststoff-verbundisolator
JPS62154505A (ja) * 1985-12-26 1987-07-09 アクソン・カーブル・エス・アー 管、電線、電気ケ−ブル及び光フアイバ用耐火性可撓性絶縁被覆
JPH01160339A (ja) * 1987-12-17 1989-06-23 Toshiba Corp 回転電機の絶縁コイルの製造方法
US5144739A (en) * 1991-06-26 1992-09-08 General Electric Company Method of establishing a leakage current path for a commutator
DE4244298C2 (de) * 1992-12-28 2003-02-27 Alstom Isolierband und Verfahren zu seiner Herstellung
DE4434825A1 (de) * 1994-09-29 1996-05-23 Tissu Rothrist Ag Verbundwerkstoff in Flachform

Also Published As

Publication number Publication date
DE502006002980D1 (de) 2009-04-09
CN101313369A (zh) 2008-11-26
BRPI0618803A2 (pt) 2011-09-13
DE102005055290B3 (de) 2007-05-03
CN101313369B (zh) 2011-11-23
EP1952407A1 (fr) 2008-08-06
US20080286505A1 (en) 2008-11-20
BRPI0618803B1 (pt) 2018-01-23
ATE424029T1 (de) 2009-03-15
WO2007057251A1 (fr) 2007-05-24

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