摘要:
A hardenable epoxy resin composition which is suitable for the production of an electrical insulation with improved thermal ageing properties, wherein said hardenable epoxy resin composition comprises an epoxy resin, a hardener, an inorganic filler composition, and a coupling agent for improving the bonding between the polymer matrix and the filler, and optionally further additives, characterized in that, (i) the filler composition comprises silica and aluminum trihydride (ATH) at a ratio of silica:ATH from 10:1 to 1:10; (ii) the average particle size distribution of the silica is within the range of from 100 µm - 0.5 µm; (iii) the average particle size distribution of ATH is below 10 µm, preferably within the range of from 10.0 µm - 0.5 µm; and (iv) the filler composition is present in an amount within the range of 20-80% by weight, calculated to the total weight of the insulating composition, and wherein (v) the coupling agent is present preferably within the range 20 of 0.1% - 10% by weight, calculated to the total weight of the insulating composition, the use of the composition for the production of an electrical insulation, and electrical articles containing such an electrical insulation system.
摘要:
Polymer concrete electrical insulation system comprising a hardened epoxy resin composition filled with an electrically non-conductive inorganic filler composition, wherein said polymer concrete electrical insulation system optionally may contain further additives, and wherein (a) the epoxy resin composition is based on a cycloaliphatic epoxy resin; (b) the inorganic filler composition is present within the range of about 76 % by weight to about 86 % by weight, calculated to the total weight of the polymer concrete electrical insulation system; (c) the inorganic filler composition comprises a uniform mixture of (i) an inorganic filler with an average grain size within the range of 1 micron (µm) to 100 micron (µm) [component c(i)], and (ii) an inorganic filler with an average grain size within the range of 0.1 mm (100 micron) to 2 mm [component c(ii)]; wherein (d) the inorganic filler with an average grain size within the range of 1 micron (µm) to 100 micron (µm) [component c(i)] is present in an amount within the range of 22 % to 42 %, calculated to the total weight of the polymer concrete electrical insulation system; and (e) the inorganic filler with an average grain size within the range of 0.1 mm to 2 mm [component c(ii)] is present within the range of 41 % to 61 % by weight, calculated to the total weight of the polymer concrete electrical insulation system; and method of producing said electrical insulation system.
摘要:
The high-voltage outdoor bushing comprises a conductor (2) extended along an axis (1 ), a condenser core (3) and an electrically insulating polymeric weather protection housing (7) moulded on the condenser core (3). The condenser core (3) contains an electrically insulating tape (4) which is wound in spiral form around the conductor (2), capacitance grading insertions (5) arranged between successive windings of the tape (4) and a cured polymeric insulating matrix embedding the wound tape (4) and the capacitive grading insertions (5). A moisture diffusion barrier is incorporated inside the condenser core (3) prior to moulding the weather protection housing (7). Such a bushing is distinguished by an excellent storage and operation stability under hot and wet weather conditions.
摘要:
The invention relates to an electric insulation material (3) - formed by a porous fibrous matrix that is impregnated with an impregnation medium (2) containing filler particles (1 ) having higher thermal conductivity than the impregnation medium and having at least one dimension smaller than 1 µm, preferably having at least one dimension smaller than 100 nm, the fibrous matrix (4) being at least partly penetrated by such filler particles (1 ) of the impregnation medium (2).
摘要:
The high-voltage outdoor bushing comprises a conductor (2) extended along an axis (1 ), a condenser core (3) and an electrically insulating polymeric weather protection housing (7) moulded on the condenser core (3). The condenser core (3) contains an electrically insulating tape (4) which is wound in spiral form around the conductor (2), capacitance grading insertions (5) arranged between successive windings of the tape (4) and a cured polymeric insulating matrix embedding the wound tape (4) and the capacitive grading insertions (5). A moisture diffusion barrier is incorporated inside the condenser core (3) prior to moulding the weather protection housing (7). Such a bushing is distinguished by an excellent storage and operation stability under hot and wet weather conditions.
摘要:
Polymer concrete electrical insulation system comprising a hardened epoxy resin composition filled with an electrically non-conductive inorganic filler composition, wherein said polymer concrete electrical insulation system optionally may contain further additives, and wherein (a) the epoxy resin composition is based on a cycloaliphatic epoxy resin; (b) the inorganic filler composition is present within the range of about 76 % by weight to about 86 % by weight, calculated to the total weight of the polymer concrete electrical insulation system; (c) the inorganic filler composition comprises a uniform mixture of (i) an inorganic filler with an average grain size within the range of 1 micron (µm) to 100 micron (µm) [component c(i)], and (ii) an inorganic filler with an average grain size within the range of 0.1 mm (100 micron) to 2 mm [component c(ii)]; wherein (d) the inorganic filler with an average grain size within the range of 1 micron (µm) to 100 micron (µm) [component c(i)] is present in an amount within the range of 22 % to 42 %, calculated to the total weight of the polymer concrete electrical insulation system; and (e) the inorganic filler with an average grain size within the range of 0.1 mm to 2 mm [component c(ii)] is present within the range of 41 % to 61 % by weight, calculated to the total weight of the polymer concrete electrical insulation system; and method of producing said electrical insulation system.
摘要:
The high-voltage bushing (1) has a conductor (2) and a core (3) surrounding the conductor (2), wherein the core (3) comprises a sheet-like spacer(4), which spacer (4) is impregnated with an electrically insulating matrix material (6). It is characterized in that the spacer (4) has a multitude of holes (9) that are fillable with the matrix material (6). Preferably, the spacer (4) is net-shaped or meshed. It can be a net of fibers. The bushing (1) can be a fine-graded bushing (1) with equalizing plates (5) within the core. As a matrix material (6), a particle-filled resin (6) can be used.
摘要:
A bushing with a duct (6) for accommodating a conductor rod which is surrounded by an electrical field grading insulation (5) comprises a core (1) with a cylindrical shell (2) encapsulating the grading insulation (5) and a f lange (3) surrounding the said shell (2) and carrying through holes (8) distributed over its circumference for allowing the bushing to be attached to a wall (4) by bolts (12). The shell (2) and the flange (3) are in one piece and consist of an insulating matrix material, e.g., a plastic material mixed with an anorganic filier material. The through holes (8) are surrounded by essentially ring-shaped metal inserts (9) each forming an annular surface flush with the surface of the flange (3) which is in contact with the head of the bolt (12) and takes up the force exerted by the latter on the flange (3). A test tap (13) comprises a contact pin (14) which is electrically conductively connected to the outermost layer of the grading insulation (5) and surrounded by a contact ring (15) connected to every second metal insert (9) by connection wires (17) for grounding the contact pin (14) via the contact ring (15) when the test tap (13) is not in use and covered by a metal cap. The core (1) is produced by filling a mould with the liquid matrix material after components of the grading insulation (5) and other parts have been fixed in the same.
摘要:
The bushing (1) has a conductor (2) and a core (3) surrounding the conductor (2). The core (3) comprises a sheet-like spacer (4), wherein the spacer (4) contains filler particles (14). The bushing (1) can be a resin- impregnated graded bushing (1) impregnated with an electrically insulating matrix material (6). The spacer (4) may comprise paper, in particular creped paper. The filler particles (14) are preferably electrically insulating or semiconductive particles. An increased thermal conductivity of the core (3) can be achieved.
摘要:
The high-voltage bushing (1) has a conductor (2) and a core (3) surrounding the conductor (2), wherein the core (3) comprises a sheet-like spacer(4), which spacer (4) is impregnated with an electrically insulating matrix material (6). It is characterized in that the spacer (4) has a multitude of holes (9) that are fillable with the matrix material (6). Preferably, the spacer (4) is net-shaped or meshed. It can be a net of fibers. The bushing (1) can be a fine-graded bushing (1) with equalizing plates (5) within the core. As a matrix material (6), a particle-filled resin (6) can be used.