Class / Patent application number | Description | Number of patent applications / Date published |
336058000 | Liquid insulating medium | 32 |
20080197955 | Hermetically Sealed Electrical Apparatus - An electric apparatus, preferably a transformer, is hermetically sealed and filled with a dielectric liquid. Devices for recording heat-related volume variations of the dielectric liquid are contained in the apparatus. Volume variations are compensated with the aid of a gas cushion, which is thermally uncoupled from the dielectric liquid. The largest part of the gas cushion is arranged in a container separated from the dielectric liquid expansion tank. All the components of volume compensating devices are constructed in such a way that the operation of used monitoring devices, in particular, also the protection against Buchholz relais waves is maintained. The invention makes it possible to hermetically seal the transformer, thereby substantially reducing the aging of the dielectric liquid and the cellulose-based insulating material of the apparatus. Furthermore, the inventive device makes it possible to avoid the use of air-dehumidifiers and respective conduits. | 08-21-2008 |
20080218300 | Transformer - The invention relates to a transformer ( | 09-11-2008 |
20090121818 | AIR CORE INDUCTOR INCLUDING A FLUX INHIBITING MEMBER - An air core inductor includes an inductor member formed in a plurality of coils. The inductor member includes a first end portion, a second end portion and a hollow core portion. The air core inductor also includes at least one stray flux inhibiting member provided on one of the first and second end portions of the inductor member. The stray flux inhibiting member blocks stray magnetic flux emanating from the air core inductor. | 05-14-2009 |
20100097167 | VEGETABLE OIL BASED DIELECTRIC COOLANT - In one aspect, the present invention provides a dielectric fluid for use in electrical equipment comprising a vegetable oil or vegetable oil blend. In another aspect the invention provides devices for generating and distributing electrical energy that incorporate a dielectric fluid comprising a vegetable oil or vegetable oil blend. Methods of retrofilling electrical equipment with vegetable oil based dielectric fluids also are provided. | 04-22-2010 |
20110037551 | Oil Filled Transformer With Spacers and Spacers for Separating and Supporting Stacked Windings - An oil filled high power transformer for high voltages with coils. The transformer including a number of stacked layers of, in the main concentric, insulated conductors forming transformer coils. The winding layers are separated by spacers. One or more spacers are provided with at least one integrated electrical discharge barrier extending off the central body of the spacer in the vicinity of the area where the spacer is in contact with a winding. Breakdown along spacer and alongside the spacer-oil interface is reduced getting improved breakdown strength of the oil filled transformer. | 02-17-2011 |
20110090034 | OIL IMMERSED ELECTRICAL APPARATUS - An oil immersed electrical apparatus such as an oil immersed transformer that can detect copper sulfide precipitated on coil insulating paper is provided. In the oil immersed transformer in which a coil with its surface covered by insulating paper is arranged in a container filled with insulating oil, a detection member is prepared by providing two electrodes on a surface of a plate-like pressboard formed of cellulose, which is a same material as that of the insulating paper, this detection member is arranged in contact with the insulating oil, and generation of copper sulfide is detected from reduction in a surface resistance between the electrodes. The temperature of the detection member is set higher than the temperature of the coil so that copper sulfide is generated thereon prior to generation of copper sulfide on a coil unit. | 04-21-2011 |
20110140820 | HYPER-COOLED LIQUID-FILLED TRANSFORMER - 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. | 06-16-2011 |
20110267161 | METHOD AND APPARATUS FOR COOLING AN ANNULAR INDUCTOR - An inductor cooling method and apparatus is provided, where the inductor comprises both a substantially annular core and an aperture therethrough. The aperture is circumferentially surrounded by the substantially annular core. A container holds a substantially non-conductive coolant and the inductor is immersed in the coolant. Optional spacers hold the inductor away from the container to allow room for coolant circulation. | 11-03-2011 |
20120092110 | OIL TRANSFORMER INSULATION MODULE - An exemplary oil transformer insulation module includes at least a first flat layer and a second layer adjacent and substantially and parallel to the first layer. The first and second layers include planar first insulation material and are connected to and spaced apart from a third corrugated layer that is arranged between the first and second layers. The third layer includes planar second insulation material, has lateral edges, and is corrugated such that all the cavities formed by the corrugated form can be flooded with a liquid via the lateral edges. | 04-19-2012 |
20120119862 | MICROBIAL OILS WITH LOWERED POUR POINTS, DIELECTRIC FLUIDS PRODUCED THEREFROM, AND RELATED METHODS - Methods and compositions for the production of dielectric fluids from lipids produced by microorganisms are provided, including oil-bearing microorganisms and methods of low cost cultivation of such microorganisms. Microalgal cells containing exogenous genes encoding, for example, a sucrose transporter, a sucrose invertase, a fructokinase, a polysaccharide-degrading enzyme, a lipid pathway modification enzyme, a fatty acyl-ACP thioesterase, a desaturase, a fatty acyl-CoA/aldehyde reductase, and/or an acyl carrier protein are useful in manufacturing dielectric fluids. | 05-17-2012 |
20120126924 | UNDERWATER POWER CONNECTOR SYSTEM AND USE THEREOF - An underwater power connection system ( | 05-24-2012 |
20120139679 | ADDITIVE FOR DIELECTRIC FLUID - A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact with the paper material. | 06-07-2012 |
20120139680 | MEDIUM / HIGH VOLTAGE INDUCTOR APPARATUS AND METHOD OF USE THEREOF - The invention comprises an inductor configured for filtering medium and/or high voltage power. The inductor includes an inductor core formed of a plurality of coated magnetic particles, each of a majority of the coated magnetic particles including: a magnetic particle core and a non-magnetic coating about a corresponding magnetic particle core. The inductor optionally includes: (1) a main inductor spacer separating a first turn of a winding from a terminal turn of the winding and (2) a segmenting spacer separating two consecutive turns of the winding about said core. The inductor is configured to convert power into an output current, such as power of at least one thousand five hundred volts with an input current of at least fifty amperes. | 06-07-2012 |
20120139681 | ELECTRICAL EQUIPMENT CONTAINING ERUCIC ACID DIELECTRIC OIL - The present invention relates to a composition suitable for use in electrical equipment containing a dielectric fluid including an oil component, the oil component including one or both of crambe oil and high erucic acid rapeseed oil and one or both of esterified crambe oil and esterified high erucic acid rapeseed oil. | 06-07-2012 |
20120242442 | WINDING ARRANGEMENT FOR AN INDUCTIVE COMPONENT - The scope of the invention is a winding arrangement for an inductive component that consists at least of a core ( | 09-27-2012 |
20120249275 | Insulation for Power Transformers - A power transformer is provided that includes a first transformer component, a second transformer component, and a composite structure positioned between the first transformer component and the second transformer component. The composite structure includes a first composite fiber having at least one base fiber, a sheath of binder material, and nanoclay particles, and a second composite fiber, having at least one base fiber, bound to the first composite fiber by at least a portion of the sheath. | 10-04-2012 |
20130113588 | ADDITIVE FOR DIELECTRIC FLUID - A dielectric fluid comprising hydrocarbon liquid admixed with an ester-based compound, wherein the ester-based compound is present in an effective amount to impart breakdown inhibiting properties to a paper insulation material when the dielectric fluid is in contact with the paper material. | 05-09-2013 |
20130162381 | OIL IMMERSED STEREO WOUND-CORE AMORPHOUS ALLOY TRANSFORMER - An oil immersed stereo wound-core amorphous alloy transformer, comprising an iron core, a high-low voltage winding, leads and a tank. The core comprises three single frames made of amorphous alloy strips by winding and are identical in structure, and the single frames have a rectangular shape; the vertical sides of every two adjacent frames fit together fixedly to form a core pillar, and the horizontal sides of the single frame form iron yokes; the cross sections of the core pillars have an approximately circular or polygonal shape; the transformer further comprises a clamp, comprising a quasi-triangular upper and lower clamp, and posts, the lower clamp is provide with three food pads; the iron yokes in the lower portion of the iron core are located on the foot pads, and the high-low voltage winding is wound on the core pillars; | 06-27-2013 |
20130278369 | SEALED INDUCTOR CONNECTION USING LITZ WIRE - An inductor comprises a ferromagnetic core, a litz wire conductor encircling the ferromagnetic core, a housing, a bobbin, a conductive pin, and a seal assembly. The housing encloses the ferromagnetic core and the litz wire conductor. The conductive pin is conductively attached to the litz wire conductor, and extends therefrom to form an external electrical contact. The bobbin supports the litz wire conductor and positions the conductive pin in alignment with an aperture in the housing which is sealed against fluid egress by the seal assembly. | 10-24-2013 |
20130285781 | NANO DIELECTRIC FLUIDS - A system is provided. The system includes about 99.9 Wt % to about 95 Wt % of an insulating liquid, and about 0.1 Wt % to about 5 Wt % of insulating, inorganic, non-magnetic nanoparticles. Another aspect of the invention includes an electrical apparatus. The electrical apparatus includes an insulation system that comprises a dielectric fluid having about 99.9 Wt % to about 95 Wt % of an insulating liquid, and about 0.1 Wt % to about 5 Wt % of insulating, inorganic, non-magnetic nanoparticles. | 10-31-2013 |
20130300525 | IMMERSION COOLED INDUCTOR APPARATUS - An immersion cooled inductor includes an inductor at least partially submerged in cooling liquid and a localized boiling feature operable to instigate boiling of the cooling liquid prior to oversaturation. | 11-14-2013 |
20140159843 | IMMERSION COOLED INDUCTOR APPARATUS - An immersion cooled inductor includes an inductor at least partially submerged in cooling liquid and a localized boiling feature operable to instigate boiling of the cooling liquid prior to oversaturation. | 06-12-2014 |
20140184371 | INSULATING MATERIAL CONTAINING POLY(PHENYLENE-1,3,4-OXADIAZOLE) - 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. | 07-03-2014 |
20140191834 | INDUCTOR APPARATUS AND METHOD OF MANUFACTURE THEREOF - The invention comprises an electrical apparatus and method of manufacture. The apparatus includes a substantially annular inductor comprising an inductor core composed of at least a distributed gap material. The distributed gap material includes particles of alternating layers of magnetic and non-magnetic materials separated by a gap material. The particles comprise an average layer thickness of less than about one hundred micrometers, where a majority of said layered particles comprise an average cross sectional size of less than about one millimeter. The inductor is cooled using at least one of: a thermally conductive potting material, a liquid coolant in direct contact with the inductor, a cooling line through the potting material or liquid coolant, and a chill coil in a container about the potting material and/or the liquid coolant. | 07-10-2014 |
20140327506 | OIL TRANSFORMER - An oil transformer includes a transformer vessel, a transformer core mounted in the vessel, at least one upright hollow cylindrical transformer coil including at least one axial cooling channel arranged around a limb of the transformer core, and an oil chamber arranged at an axial front side of the transformer coil. At least one first opening leading from the inner chamber to the belonging front side of the transformer coil is provided, and at least one second opening is provided within the surrounding boundaries of the oil chamber. The oil chamber is an under-pressure chamber, wherein the at least one first opening is an inlet port and the at least one second opening is an outlet port. | 11-06-2014 |
20140354387 | OIL TRANSFORMER INSULATION MODULE - An exemplary oil transformer insulation module includes at least a first flat layer and a second layer adjacent and substantially and parallel to the first layer. The first and second layers include planar first insulation material and are connected to and spaced apart from a third corrugated layer that is arranged between the first and second layers. The third layer includes planar second insulation material, has lateral edges, and is corrugated such that all the cavities formed by the corrugated form can be flooded with a liquid via the lateral edges. | 12-04-2014 |
20150015355 | OIL-FILLED TRANSFORMER SWITCHING FRAME - An oil-filled transformer switching frame is disclosed which includes at least one longitudinal channel element that is essentially formed by a wall that is curved in a U-shaped manner, for receiving in its inner region stranded conductors of an oil tank of an oil transformer. The wall of the channel element can include a first layer of mechanically strong, planar insulating material and a second layer of mechanically strong, planar insulating material that is adjacent to and fundamentally parallel to said first layer, the first layer and the second layer being connected to and spaced apart by a third layer of a mechanically strong, corrugated insulating material having hollow spaces that can be flooded with a fluid by way of lateral edges. | 01-15-2015 |
20150325358 | Expansion radiator for a hermetically closed electrical transformer - An expansion radiator for a hermetically closed electrical transformer or a throttle. A heat exchange fluid is delivered to the radiator via an inflow, passed through an expansion shaft cavity formed by an expansion shaft and an associated cover part, and then drained off via an outflow. A flow guiding part which steers a flow direction of the heat exchange fluid is arranged in a mouth region between the inflow and the expansion shaft cavity. | 11-12-2015 |
20150357109 | REACTOR PROVIDED WITH A COOLER - A reactor provided with a cooler, comprising: a coil, a core formed of a soft magnetic material, the core covers an inside of the coil and an outer periphery of the coil; the cooler being arranged on both sides of the core, the core and the cooler being pressed in a stacking direction of the core and the cooler; a thickness of the core in the stacking direction being smaller than a length of a height of a surface of the core that faces the stacking direction; and the thickness of the core in the stacking direction being smaller than a length of a width of the surface of the core that faces the stacking direction. | 12-10-2015 |
20160107795 | TANK FOR ELECTRICAL EQUIPMENT - A tank for electrical equipment such as power transformers and shunt reactors has integral stiffeners for reinforcing the tank during overpressure conditions, such as during an arc fault. The stiffeners are formed of a material that is more ductile than the material to which the stiffeners are attached, such as the tank walls and cover. The tank with integral stiffeners allows for expansion of the internal volume of the tank during overpressure conditions, thus, increasing the flexibility of the tank and mitigating the risk of tank rupture. | 04-21-2016 |
20160148744 | Electrical Power Component Containing An Insulating Fluid And A Condenser Core - An electrical power component, such as a bushing. The power component includes a housing, a condenser core arranged in the housing and including an electrical insulation, a space formed between the condenser core and the housing, an expansion vessel positioned adjacent and in open communication with the space between the condenser core and the housing, and an electrically insulating fluid, such as oil, contained in the space between the condenser core and the. The power component further includes one or more filler elements having a higher density and lower thermal expansion coefficient than the fluid, and the one or more filler elements are movably arranged in the expansion vessel. | 05-26-2016 |
20160254085 | COOLING METHOD FOR PLANAR ELECTRICAL POWER TRANSFORMER | 09-01-2016 |