摘要:
A multilayer insulating wire having two or more extrusion covering insulating layers formed on a conductor directly or through a layer, or formed outside a conductor or a multi-conductor wire constituted by bundling a plurality of insulated conductors. At least one of the insulating layers is formed of an intimate mixture of 100 parts by weight of a polyether sulfone resin and 10 to 100 parts by weight of an inorganic filler. A transformer produced by using such multilayer insulated wires are also disclosed. The transformer has a heat resistance of at least the F-grade (155 DEG C) conforming to the IEC 950 Standards, and excellent electric characteristics even at high frequencies. The transformer does not lose the electric characteristics even at high frequencies, and is not affected by heat.
摘要:
An electrical wire comprises an elongate electrical conductor, an inorganic arc-control layer surrounding the conductor, an insulating layer which surrounds the arc-control layer and comprises an aromatic polymer, and a secondary tracking control layer surrounding the insulating layer, the secondary tracking control layer having a comparative tracking index of at least 300V. The wire exhibits good electrical and mechanical properties characteristic of highly aromatic polymers together with good resistance to dry arcing and wet tracking.
摘要:
A composition comprising (a1) a polyether polyol, (a2) a polyolefine polyol and (a3) a polyester polyol obtainable by epoxidation of an unsaturated fatty acid ester and subsequent ring-opening reaction with a compound containing active hydrogen, can be used for the preparation of PUR foam which distinguishes by low-temperature flexibility and low dielectric loss and is suitable for filling the gap between the condenser core and the outer composite or porcelain insulator in the manufacture of resin impregnated paper (RIP) bushings.
摘要:
The invention relates to an insulated conductor comprising an elongate conductor provided with an insulating layer which comprises a polymeric material. Said polymeric material has a crystallinity of at least 25% and includes a repeat unit of general formula (I) wherein t1 and w1 independently represent 0 or 1 and v1 represents 0,1 or 2. The insulating layer has a thickness in the range 2µm - 300µm.
摘要:
An insulated conductor and method for making it are disclosed. The insulated conductor includes an elongate conductor and a multi-layer insulation system. The multi-layer insulation system has a first insulating layer including an aromatic thermoplastic material overlying the elongate conductor and a second insulating layer including a perfluoropolymer adjacent the first insulating layer. The first and second insulating layers are each applied to a thickness such that the multi-layer insulation system exhibits a scrape abrasion resistance that is significantly greater than sum of the scrape abrasion resistance of the first and second insulating layers individually at that thickness.
摘要:
An electrical submersible pumping system includes a pump assembly and a motor assembly. The motor assembly includes a plurality of stator coils and each of the plurality of stator coils comprises magnet wire. The magnet wire has an insulator surrounding a conductor and the insulator is manufactured from a polyether ether ketone film. In another aspect, the preferred embodiments provide a method for manufacturing a motor assembly for use in an electrical submersible pumping system. The method includes steps of preparing magnet wire having an electrical conductor and a polyether ether ketone film insulator.