Insulating materials with formed holes

FIELD: electricity.

SUBSTANCE: improved electrically insulating tape (16) is offered which comprises the protective layer (20) and the electrically insulating layer (18) joined with the protective layer (20). At least, one of either the electrically insulating layer (18) or the protective layer (20) includes a set of formed apertures (26) to improve penetration of impregnating pitch into the insulating tape (16) during pitch impregnation.

EFFECT: invention provides optimum impregnation of the tape that improves the ability to resist to impact of voltage and premature breakdown and accident.

10 cl, 11 dwg

 



 

Same patents:

Communication cable // 2505874

FIELD: radio engineering, communication.

SUBSTANCE: in a communication cable, having at least two pairs of twisted, insulated current conductors, coated with an external insulation with an air space inside, the external insulator is made with fastening element in form of a strap and/or loop which enables to mount the cable directly to the bearing structure.

EFFECT: easy mounting of the cable due to addition of a dividing strap or loop, which serve as a fastening element, higher reliability of the cable owing to improved resistance thereof to crosstalk since the considerably longer distance between the current conductors coupled with the paired structure of the conductors and the twisting length are optimally selected, which provides more optimal protection of digital subscriber lines from external interference.

10 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: invention is related to assembly of twisted insulated electrical conductors parallel to each other, at that each electrical conductor is surrounded by insulating material and thermoplastic retention material; in this connection electrical conductors are wound forming a wound bundle and retention material is located so that it connects all insulated electrical conductors in the bundle and at the same time each electrical insulated conductor is connected at least with one adjoining electrical conductor; and thus part of insulating material of at least one electrical insulated conductor in the bundle is identified visually from outside of the assembly.

EFFECT: improving separation of electrical insulated conductors from each other.

12 cl, 5 dwg

Electric cable // 2424592

FIELD: electricity.

SUBSTANCE: electric cable includes current-conducting cords insulated with thermoplastics and sheath from thermoplastic elastomer, which is located on each cord and/or on all together; at that, cord insulation is made from oxygen-free-radiation-modified thermoplastic material through sheath, and sheath is made from thermoplastic elastomer soaked with non-saturated hydrocarbons. Saturation of insulation from thermoplastic material with non-saturated hydrocarbons also improves cable characteristics. Gap made between insulated cords in cable with common sheath increases its operating life.

EFFECT: longer operating life of cable at operation in contact with corrosive medium.

7 cl, 2 dwg

FIELD: power engineering.

SUBSTANCE: method is described for manufacturing of electric cable (10), comprising at least one core, which includes conductor (1) and insulating coating (2), which surrounds conductor, at the same time method includes the following stages: supply of polyolefine material, cross-linking system on silane basis and foam generation system, comprising at least one exothermic foaming agent in amount of at least 0.1% - 0.5% (wt) per total mass of polyolefine material; production of polyolefine material mixture, cross-linking system on silane basis and foam generation system; and extrusion of mixture to conductor (1) to make insulating coating (2). Also electric (10) is described, which comprises at least one core, which consists of conductor (1) and insulating coating (2), which surrounds mentioned conductor (1) and is in contact with it, at the same time insulating coat (2) mainly consists of a layer of foamed silane-linked polyolefine material, characterised with extent of foaming in the range from 3% to 40%.

EFFECT: increased flexibility of cable, improved mechanical characteristics and electric properties.

55 cl, 6 tbl, 6 ex

FIELD: electrical engineering including cable engineering; midget control cables for wire communication lines of small-size missiles and their manufacturing process.

SUBSTANCE: proposed midget control cable has two electrically insulated enameled copper conductors (current-carrying conductors), one strengthening complex thread of cross securing lea winding of three polyamide threads forming thread assembly, as well as seven strengthening complex threads placed on top of cross securing winding in parallel with copper conductors, and secondary securing winding of one complex strengthening thread; thread assembly is impregnated with water-repelling liquid. Proposed method for manufacturing midget control cable includes manufacture of thread assembly followed by finishing midget control cable for which purpose seven strengthening complex threads are arranged in parallel with thread assembly whereupon finished midget control wire is wound on take-in reel.

EFFECT: improved electrical and mechanical characteristics, ability of using cable immersed in water including sea water.

2 cl, 2 dwg

FIELD: electrical engineering including cable engineering; midget control cables for wire communication lines of small-size missiles and their manufacturing process.

SUBSTANCE: proposed midget control cable has two electrically insulated enameled copper conductors (current-carrying conductors), one strengthening complex thread of cross lea securing winding of three polyamide threads forming thread assembly, as well as four strengthening complex threads placed on top of cross securing winding in parallel with copper conductors, two-layer lea winding of two polyamide threads wound in opposite directions, and one complex thread. Proposed method for manufacturing midget control cable includes manufacture of thread assembly followed by finishing midget control cable for which purpose four strengthening complex threads are arranged in parallel with thread assembly and two-layer winding is placed overall.

EFFECT: improved electrical and mechanical characteristics, ability of using cable immersed in water including sea water.

2 cl, 3 dwg

Electric cable // 2309474

FIELD: cable engineering; feeding submersible power systems, primarily electric motors of submersible oil pumps.

SUBSTANCE: proposed oil-pump motor feeding cable designed for long-time service in boreholes at depths up to 3 000 m and stratal liquid temperatures of 80 to 210 °C has insulated current-carrying conductors and thermoelastolayer sheath disposed on each conductor and/or on all conductors; conductor insulation is made of acid-free radiation-modified high-density polyethylene and sheath, of thermoelastolayer. Such mechanical design of cable whose conductors are covered with air-tight insulation provides for radiation modification of high-density polyethylene dispensing with specific mechanical devices and attachments.

EFFECT: improved electrophysical and mechanical characteristics of insulation maintained even at high-speed cable lifting upon long-time service in boreholes; extended cable service life.

1 cl, 2 dwg, 1 tbl

Electric cable // 2303307

FIELD: cable engineering; feeding submersible power systems of oil-extracting pump motors.

SUBSTANCE: proposed cable designed for use at depth of up to 3000 m, stratal liquid temperature of 140 to 210 °C, gas factor over 300 m3/t, and pressure of up to 30 MPahas current-carrying conductors insulated by radiation-modified polyethylene, sheath, pad, and armor, as well as additional sheath made of thermoelastic plastic layer, 0.2 to 0.7 mm thick, that covers insulation of each current-carrying conductor, surface layer of double-layer insulation being plasma pre-treated.

EFFECT: enhanced service life of cable.

1 cl, 1 dwg

Electric cable // 2302678

FIELD: cable engineering; feeding submersible power systems, mainly submersible oil-extraction pump motors.

SUBSTANCE: proposed cable designed for trouble-free operation in depths of up to 3000 m at stratal liquid temperature of 140 to 160 °C and gas factor over 300 m3/t has current-carrying conductors covered with adhesive radiation-modified polyethylene layers, sheath, pad, and armor; common additional sheath is made of thermoplastic material, 0.1 - 1.0 mm thick on flat side and 1.0 - 1.5 mm, on lateral sides; it is disposed over three insulated conductors longitudinally placed in common plane and tightly fitted to one another through their plasma pre-treated insulation.

EFFECT: extended service life of cable.

1 cl, 1 dwg

Insulating sheath // 2270489

FIELD: electric insulation engineering; insulating sheaths possessing fire and heat resistance and screening effect.

SUBSTANCE: proposed insulating sheath characterized in high resistance to open flame, high temperatures up to 600 °C, acids, oil products, organic solvents, and microbiological impacts is made of threads having different composition and twisted together; one of threads is made of arimide fiber and functions as reinforcing warp, and other one is made in the form of metal thread, more than 0.018 and less than 0.020 mm thick, that functions as shielding component. Coated or non-coated metal wire is used as shielding component. Reinforcing warp can be made in the form of harness of at least two arimide threads twisted together or it may have a few pairs of arimide fiber threads and metal thread twisted together; these pairs are interwoven to form ribbon or cloth.

EFFECT: enhanced fire resistance and flexibility, reduced weight of insulating sheath.

5 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a heat-resistant wire or cable with improved operational properties designed for use in demanding or extreme conditions, for example in well drilling or field development, in industrial, military aerospace, naval fields, as well as in the motorcar, railway and public transport. Such cables can be subjected to extreme temperatures, corrosive substances or atmospheres or fire. The wire or cable comprises a conductor and a polymer sheath consisting of an internal and an external layer. One layer is tape made of polyetheretherketone (PEEK) and has thickness of 5-150 mcm. The second layer is fire-resistant and is made of a siloxane polymer or a polymer based on silicon dioxide as a polymer matrix. The PEEK tape can be combined with a mica layer or a layer which is polymer tape with mica particles.

EFFECT: invention increases fire-resistance of the sheath, its flexibility and resistance to mechanical stress, enables to obtain a wire or cable with a lower weight and diameter.

12 cl, 5 dwg

FIELD: physics; electricity.

SUBSTANCE: fibre glass layer contains out-of-wind fibre glass. It can be woven fibre glass fabric. The material is applied mainly for covering electric conductor, such as wire applicable for high-temperature environments and coils for high-voltage electric motors and generators.

EFFECT: possibility of production of thinner insulation material without deterioration of mechanical or electric properties.

19 cl, 3 tbl, 3 ex

FIELD: insulation materials.

SUBSTANCE: invention relates to electroinsulation materials for electric machine windings and aims at creating electroinsulation material possessing high heat resistance (155-180°C), high electrical and mechanical strengths, environmental safety, and which would retain its flexibility over a long storage period. Electroinsulation material according to invention contains mica paper layer, one or two substrate made of glass fabric or from glass fabric and polyester or polyimide film, and binder based on unsaturated nitrogen-containing polyester prepared by condensation of maleic anhydride and polyatomic acids with N-(β-hydroxyethyl)-1,2-amidophthalic acid, N-(β-hydroxyethyl)-1,2-amidoisomethyltetrahydrophtalic acid, N-(β-hydroxyethyl)-1,2-amidoendomethylene trahydrophtalic acid, or mixture thereof (39.6-40.9 wt parts), polymerizable diluent: oligoether acrylate (36.0-48.7 wt parts), and peroxide initiator (0.8-1.0 wt parts), oligoether acrylate including also target additives (2.4-14.0 wt parts), and optionally low-molecular weight epoxy acid as second binder (2.0-12.1 wt parts).

EFFECT: improved performance characteristics.

2 tbl, 13 ex

FIELD: electrical engineering; insulating materials for wires or commutators of electrical machines.

SUBSTANCE: proposed mica base insulating material has mica paper layer, backing of inorganic fiber (glass or basalt), and binders, such as betulinic and adipic acids having molecular mass of 10 000 to 15 000. Such binders of desired molecular mass can be easily produced.

EFFECT: enhanced mechanical strength, heat resistance, and flexibility; facilitated manufacture.

1 cl, 2 tbl, 11 ex

The invention relates to the field of electrical engineering and for the specifics insulation of the windings of electrical machines

The invention relates to the manufacture of mica paper and can be used in the manufacture of electrical insulating materials

The invention relates to electrical engineering, in particular to the insulation of electrical products

The invention relates to insulating materials and methods for their manufacture
Insulating material // 2084031
The invention relates to electrical engineering materials, namely, fire-resistant insulating materials intended primarily for the protection of cables, operating in high temperature conditions

FIELD: electrical engineering; insulating materials for wires or commutators of electrical machines.

SUBSTANCE: proposed mica base insulating material has mica paper layer, backing of inorganic fiber (glass or basalt), and binders, such as betulinic and adipic acids having molecular mass of 10 000 to 15 000. Such binders of desired molecular mass can be easily produced.

EFFECT: enhanced mechanical strength, heat resistance, and flexibility; facilitated manufacture.

1 cl, 2 tbl, 11 ex

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