摘要:
A nonwoven web of poly(phenylene-1,3,4-oxadiazole) and polymetaphenylene isopthalamide. was found to have greater retention of tensile strength than kraft paper after immersion in oil at high temperature, making it useful as an insulation material for transformers.
摘要:
Provided herein are dielectric fluids comprising at least one estolide compound of formula: in which n is an integer equal to or greater than 0; m is an integer equal to or greater than 1; R1, independently for each occurrence, is selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; R2 is selected from hydrogen and optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R3 and R4, independently for each occurrence, are selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched. Also provided herein are uses of dielectric fluids and electrical devices such as transformers that comprise a dielectric fluid comprising at least one estolide compound.
摘要:
A gas monitoring apparatus and system that provides for reliable and accurate monitoring of gaseous hydrogen and other compounds in dielectric oil. The apparatus provides an environment for and is used in conjunction with metal oxide semiconductor sensors. Apparatus for creating a fluid-tight environment for the metal oxide semiconductor and a heating manifold are detailed.
摘要:
In a stationary induction apparatus, an inter-partial-coil insulating plate and a plurality of inter-partial-coil spacer insulators form a refrigerant flow path in conjunction with each other. A space having an inter-partial-coil insulation dimension for withstanding an abnormal voltage is formed between a pair of partial coils. The inter-partial-coil insulating plate and the inter-partial-coil spacer insulators support both the pair of partial coils at an insulated state so as to maintain the inter-partial-coil insulation dimension. The insulators are arranged so as to be overlapped with each other in the direction in which mutually adjacent partial coils are opposed to each other.
摘要:
An induction device for association with high voltage electric transmission systems having at least one core frame and at least one winding arranged around said core frame. The induction device has at least one magnetic core leg arranged in said core frame. The core frame includes a stack of core segments of a magnetic material being cooled by cooling medium, arranged in compression in the core frame, core gaps being arranged to separate the core segments, and a plurality of spacers, arranged in the core gaps between the core segments, with a cross section of hexagonal shape, having an upper and a lower end-face being in contact with the core segments. The spacers in at least one of the core gaps are arranged densely packed so as to form a compact filling in the core gap.
摘要:
An electric transformer comprising: a magnetic core; at least one coil assembly which is positioned around a portion of the magnetic core and comprises a plurality of windings; a structure adapted for applying a clamping force on the magnetic core and/or the windings; and a cooling circuit adapted for conveying cooling fluid directly inside the coil assembly.
摘要:
A transformer is disclosed that includes a housing having a core-winding assembly positioned therein that is immersed in a dielectric transformer fluid contained within the housing. A cooling system is provided to cool the dielectric transformer fluid contained within the housing and includes a closed-loop fluid path having a quantity of dielectric cooling fluid that is circulated there through and that is maintained separate from the dielectric transformer fluid. A liquid-to-liquid heat exchanger is positioned along the closed-loop fluid path and within the housing so as to be immersed within the dielectric transformer fluid, with the liquid-to-liquid heat exchanger cooling the dielectric transformer fluid based on a liquid-to-liquid transfer of heat energy between the dielectric cooling fluid and the dielectric transformer fluid. The cooling system also includes a heat dissipation system positioned remotely from the liquid-to-liquid heat exchanger to cool the dielectric cooling fluid circulating through the closed-loop fluid path.
摘要:
An induction device for association with high voltage electric transmission systems having at least one core frame and at least one winding arranged around said core frame. The induction device has at least one magnetic core leg arranged in said core frame. The core frame includes a stack of core segments of a magnetic material being cooled by cooling medium, arranged in compression in the core frame, core gaps being arranged to separate the core segments, and a plurality of spacers, arranged in the core gaps between the core segments, with a cross section of hexagonal shape, having an upper and a lower end-face being in contact with the core segments. The spacers in at least one of the core gaps are arranged densely packed so as to form a compact filling in the core gap.
摘要:
A transformer device includes an iron core, a plurality of stacked coils, wound onto the iron core, a plurality of base members arranged between the plurality of coils adjacent in a stacking direction, a plurality of flow channel member groups provided for each of the coils, each provided at a corresponding base member, and forming a flow channel directed to a flow of an insulating liquid between the corresponding base member and a corresponding coil, and an obstruction member arranged to obstruct the flow of the insulating liquid such that at least one of the flow channels formed by the plurality of flow channel member groups differs in the flow volume of the insulating liquid from another of the flow channels, and to obstruct the flow of the insulating liquid at a region not overlapping with the iron core in the flowing direction of the insulating liquid, among the flow channels.
摘要:
An oil cooling system, which may be employed for transformers feeding traction electric motors and for oil in a high viscosity condition, includes a first heat exchanger between a heat generating source to cooling oil that is connected by delivery and return ducts to a second heat exchanger cooling the oil by transmitting the heat absorbed at the first heat exchanger to an environment having a lower temperature than the cooling oil. The oil cooling system also includes devices flowing the cooling oil from the first to the second heat exchanger and vice versa, and devices monitoring oil flow in the circuit, for example by indicating operating conditions of the cooling system and/or by performing safety operations when the heat generating source becomes overheated.