Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 201 - 250 out of 6,699

Document Document Title
WO/2012/116946A1
An inductor apparatus (2) includes an inductor winding (3), a core (4) defining a magnetic circuit (1) for a magnetic flux generated by a current flowing through the inductor winding (3), at least one permanent magnet (5) magnetically bi...  
WO/2012/103587A1
In a fault current limiter (FCL) of a saturated core type having at least one coil wound around a high permeability material, a method of suppressing the time derivative of the fault current at the zero current point, the method includin...  
WO/2012/089717A1
The invention relates to a transformer comprising at least one secondary (5) having windings (5.1, 5.2, 5.3), a pair of wound magnetic transducers (6.1, 6.4), one of the transducers (6.1) including one or more first conductive bars (10.1...  
WO/2012/072181A1
The invention relates to a tap changer for switching over between winding taps of a tap transformer without interruption, wherein two load branches are provided for each phase which is to be switched and each load branch has a vacuum swi...  
WO/2012/070761A1
The present invention relates to a tap position indicator, and more particularly, to a tap position indictor for directly receiving the specifications of an on-load tap changer (OLTC) from a worker working in the field, and for setting t...  
WO/2012/062408A1
The invention relates to an on-load tap changer for the uninterrupted changeover between two winding taps of a tap-changing transformer, wherein two load branches are provided such that the one load branch is electrically connected to th...  
WO/2012/016202A3
Fault Current Limiters (FCL) provide protection for upstream and/or downstream devices in electric power grids. Conventional FCL require the use of expensive conductors and liquid or gas cryogen handling. Disclosed embodiments describe F...  
WO/2012/055502A1
The invention relates to a tap changer for low-power switching between different winding taps of a step transformer. The general inventive concept consists in using a planetary stepping gear system that is further developed for use in a ...  
WO/2011/024179A8
A three-phase current limiter (30) for an alternating current system includes an AC magnetic circuit having at least one AC coil (35Rl, 35Sl, 35Tl) for each phase of a 3- phase AC supply wound on a saturable ferromagnetic core and config...  
WO/2012/041367A1
The invention relates to an arrangement for reducing the unidirectional flux fraction in the core of a transformer, comprising: - a compensation winding (3) that is magnetically coupled to the core (4) of the transformer, - a DC generato...  
WO/2012/038030A1
The invention relates to an energy store for an on-load tap changer. The general inventive concept consists in specifying an energy store for an on-load tap changer, in which a first gearwheel (2), which is in the form of a sun wheel, is...  
WO/2012/034653A1
The invention relates to a tap changer for switching among winding taps of a step transformer without interruption, wherein two load branches are provided for each phase to be switched and each load branch has a vacuum switching contact ...  
WO/2012/030428A1
A switch comprising a plurality of transformers and a path comprising a number of wires. Each of the plurality of transformers comprises a core and a control winding. The path is configured to connect the plurality of transformers to eac...  
WO/2012/022397A1
The invention relates to a tap changer for switching among winding taps of a step transformer without interruption, said step transformer having an oil-filled transformer tank, wherein the tap changer does not have a separate housing or ...  
WO/2012/022396A1
The invention relates to an on-load tap changer for switching among different winding taps of a step transformer without interruption. The general inventive concept lies in eliminating the previously static design of the on-load tap chan...  
WO/2012/019514A1
A high voltage direct current (HVDC) converter transformer and method for on-load tap change (OLTC) switch connection thereof, wherein said HVDC converter transformer comprises DC and AC sides; the AC side comprises an AC side main coil,...  
WO/2012/019663A1
The invention relates to a coil arrangement, in particular an alternating-current transformer, comprising two windings, which are wound around a leg, in particular around a middle leg, of a coil core, wherein outer legs of the coil core ...  
WO/2012/013237A1
A current limiter (10) comprising at least one core element (12), the or each core element (12) including a hard magnetic material, and at least one electrically conductive wire being wound around a portion of the respective core element...  
WO/2012/016202A2
Fault Current Limiters (FCL) provide protection for upstream and/or downstream devices in electric power grids. Conventional FCL require the use of expensive conductors and liquid or gas cryogen handling. Disclosed embodiments describe F...  
WO/2011/160743A1
The invention relates to a tap changer (10) for switching among at least two winding taps (12, 14) of a step transformer (16) without interruption, wherein a load branch having a path (18) comprising a series arrangement of at least one ...  
WO/2011/157316A1
The present invention relates to an on-load tap changer for switching among winding taps of a step transformer without interruption. The general inventive concept lies in connecting a first winding tap of a first main current branch to a...  
WO/2011/157317A1
The invention relates to a tap changer (10) for switching among at least two winding taps (12, 14) of a step transformer (16) without interruption. The tap changer (10) has a load branch having at least two parallel paths (18, 20), each ...  
WO/2011/157318A1
The invention relates to a tap changer (10) for switching among at least two winding taps (12, 14) of a step transformer (16) without interruption, comprising at least one mechanical switching element (MTF, TTF, 32) and at least one vacu...  
WO/2011/110951A3
An electromagnetic system consists of an electric circuit comprising two solenoids wired in series, one mounted either side and proximate to a toroid. Voltage is applied across the toroid and the solenoids in a specific sequence which al...  
WO/2011/152753A1
The invention relates to electrical engineering and can be used in reactors controlled by magnetization which are installed, for example, in an electrical circuit for reactive power compensation, for voltage stabilization, for parallel o...  
WO/2011/091256A3
A superconducting fault current-limiter is provided, including a superconducting element configured to resistively or inductively limit a fault current, and one or more variable-impedance shunts electrically coupled in parallel with the ...  
WO/2011/141081A2
The invention relates to an on-load tap changer for step transformers, which has one main current branch and one auxiliary current branch for each of the two winding taps to be switched. In each main current branch and auxiliary current ...  
WO/2011/141080A1
The invention relates to a switching arrangement for a tap changer, comprising a plurality of contact rods (3), which are arranged parallel to each other, at a distance from each other, and in a circular shape around a central longitudin...  
WO/2011/141076A2
The invention relates to an on-load tap changer for switching among winding taps of a step transformer without interruption. According to the invention, in each auxiliary current branch of the on-load tap changer, which operates with vac...  
WO/2011/134528A1
A selector switch arrangement (1) for a high voltage device comprising a cylindrical current collector (2) made of electrically conductive material and having a first (3) and a second end (4), a movable contact (5) arranged movable along...  
WO/2011/129717A1
The invention relates to electrical engineering and may be utilized in an electrical circuit for reactive power compensation, voltage stabilization, etc. The reactor comprises three upper and three lower vertical rods. Two-section windin...  
WO/2011/024179A3
A three-phase current limiter (30) for an alternating current system includes an AC magnetic circuit having at least one AC coil (35Rl, 35Sl, 35Tl) for each phase of a 3- phase AC supply wound on a saturable ferromagnetic core and config...  
WO/2011/110951A2
An electromagnetic system consists of an electric circuit comprising two solenoids wired in series, one mounted either side and proximate to a toroid. Voltage is applied across the toroid and the solenoids in a specific sequence which al...  
WO/2011/082528A1
A moving contact for an oil-immersed load switch comprises an upper contact plate (202), a lower contact plate (204), an upper leaf spring (302) and a lower leaf spring (304). The upper contact plate is opposite to the lower contact plat...  
WO/2011/076309A1
The invention relates to a step switch provided with a preselector and a polarity circuit, a separate polarisation resistance being respectively provided at the beginning and the end of the stepped winding. Optionally, the two polarisati...  
WO/2011/072460A1
An alternating-current stepped controllable paralleling single/three-phase reactor comprises a main reactor (1), a stepped reactor (2), a detection unit (3) and a central controller (4). The main reactor (1) is a single-phase or three-ph...  
WO/2011/073771A1
A polyphase transformer (1 ) comprising at least a first leg (2, 51 ) and a second leg (3, 52) of a magnetic material is described. The transformer comprises a single core with legs (2-4, 51-53) and yokes (27, 28, 54, 55). A primary wind...  
WO/2011/068044A1
A voltage transformer comprises: a primary winding (3) that receives an AC voltage; a plurality of secondary windings (4a, 4b) that have mutually different numbers of turns; and a voltage converter circuit (5) for converting AC voltages ...  
WO/2011/060779A1
The invention relates to a continuously adjustable transformer (200), comprising a transformer core (100), a primary winding (7), a one-layer contactable adjustment winding (30), an adjustment contact (22) that can be moved along the adj...  
WO/2011/042070A1
The invention relates to a tap changer which has two load arms which each have vacuum interrupters. According to the invention, an additional mechanical switching element is provided between the load arms and the common load discharge li...  
WO/2011/035394A1
A three phase fault current limiter (FCL 6) has three spaced apart input terminals (7) for electrically connecting to respective terminals (5) of a transformer (2). Three output terminals (8) electrically connect FCL (6) with a load circ...  
WO/2011/029251A1
A non-excitation cage-shaped voltage-regulation tap changer for a transformer. Each phase of the tap changer has two cage bodies. One of the cage bodies has annular fixed contacts (7-1) linked with main winding taps (K) and annular fixed...  
WO/2011/022906A1
A cage-style tap-changer without excitation for transformer includes up and down brackets (2, 3) and insulating poles (4) connected between them along peripheral direction. There are interval annular fixed contacts (7) on the axes of the...  
WO/2011/024180A1
A current limiting device (30, 40, 50, 60) comprising for each phase of an AC supply a closed magnetic core (31) of reduced volume and mass having first and second pairs of opposing limbs (32a, 32b; 33a, 33b), and at least one AC coil (3...  
WO/2011/024179A2
A three-phase current limiter (30) for an alternating current system includes an AC magnetic circuit having at least one AC coil (35Rl, 35Sl, 35Tl) for each phase of a 3- phase AC supply wound on a saturable ferromagnetic core and config...  
WO/2011/002829A1
An ignition apparatus includes a core, primary and secondary windings and a loop-shaped magnetic return path structure. The structure includes layers of wound strip steel or wound ferritic wire stacked in an outward fashion. The core is ...  
WO/2010/127759A1
The present invention relates to a method for quantitatively analyzing gases as a monitor for on-load tap changers. The general inventive concept lies in selecting particular characteristic gases allowing an indirect subsequent associati...  
WO/2010/122422A1
The present invention relates to providing electrical contact in a tap changer of a transformer. A tap changer with contacts is provided, which contacts contributes to a compensation of tolerances and wear. The tap changer comprises a cy...  
WO/2010/115485A1
The invention relates to an on-load tap changer comprising semiconductor switching elements for uninterrupted switching between fixed tap changer contacts which are electrically connected to winding taps of a tapped transformer. Each of ...  
WO/2010/094993A1
The invention relates to converter equipment for electric power generation by means of converting constant magnetic field into alternating current without mechanical moving parts. The technical result is the increase of efficiency- outpu...  

Matches 201 - 250 out of 6,699