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Patent Searching and Data


Matches 101 - 150 out of 6,611

Document Document Title
WO/2014/173497A1
The invention is related to a coil assembly (22, 42, 72, 92) for a dry high-voltage transformer, comprising at least one coil with hollow cylindrical electrical winding (24, 44, 94) and with taps (104), wherein the coil is surrounded at ...  
WO/2013/163052A3
A system for heating a hydrocarbon resource in a subterranean formation having a wellbore extending therein is provided. The system includes a radio frequency (RF) source, an RF antenna to be positioned within the wellbore, and a transfo...  
WO/2014/167205A1
In order to allow adjustments in the voltage on the basis of the charge fluctuations, an MV/LV transformer (10) is combined with a second booster transformer (20), comprising a plurality of sockets (22, 24, 26) on the primary winding of ...  
WO/2014/161729A1
The invention relates to a method for performing a switching process in an on-load tap changer between winding taps of a tapped transformer. The switching process for an on-load tap changer is subdivided into a plurality of phases accord...  
WO/2014/153936A1
A self-adaptive load type distribution transformer comprises a distribution transformer body unit, an on-load capacity-adjusting and voltage-adjusting integrated unit, an associated equipment unit, and a comprehensive control unit. The d...  
WO/2014/016532A3
The present invention concerns an adjustment device intended to equip electrical networks, and more particularly a device (3) for dynamically adjusting the voltage of an electrical network (1) having a first voltage and an electrical net...  
WO/2014/129055A1
The purpose of the present invention is to ensure insulation distances among tap lead parts, and to decrease the height of a coil, so as to reduce the size of a transformer. In order to facilitate the connection of tap lead lines, a stra...  
WO/2014/103406A1
An electrical circuit forming unit is constituted by forming a steady-state electrical circuit by arranging a plurality of mutually adjoining contact members (11) capable of contacting with and separating from each other between a first ...  
WO/2014/078870A1
Techniques for improving performance of a transformer shared amongst a plurality of operating modes. In an aspect, first and second primary windings of a transformer are coupled to an AC ground voltage. Primary windings are mutually coup...  
WO/2014/056694A1
The invention relates to an on-load tap changer (1) with a tickler winding (4) and to a method for operating an on-load tap changer (1) with a tickler winding (4). The on-load tap changer (1) is used to transfer a load from one step cont...  
WO/2014/048650A1
The invention discloses an on-load tap changer having a preselector (20) for controlling a control transformer (T) without interruption. The preselector (20) has a plurality of contact bars (21, 23, 25). One of the contact bars (25) is m...  
WO/2014/047917A1
A single-phase electric furnace transformer is provided according to the basic principle of the invention, comprising: a single magnetic core, said magnetic core comprising two side columns and at least one main column; a main transforme...  
WO/2014/026805A1
The invention relates to a load transfer switch for an on-load tap changer for switching from a connected winding tap to a preselected winding tap of a tapped transformer. The load transfer switch comprises at least one resistance-free c...  
WO/2014/019858A1
The present invention relates to a step switch (1) according to the reactor switching principle for interruption-free load transfer by means of at least one load interrupter (4, 5). For a step switch (1) according to the reactor switchin...  
WO/2014/021773A1
The invention concerns a device comprising a controllable grounding transformer (1 ) arranged to compensate for a residual operating current in grounding of an alternating- current network having a power transformer (3). A primary windin...  
WO/2014/019828A1
The present invention relates to a step switch according to the reactor switching principle for interruption-free load transfer by means of vacuum interrupters in accordance with the preamble of claim 1. For a step switch according to th...  
WO/2014/016532A2
The present invention concerns an adjustment device intended to equip electrical networks, and more particularly a device for dynamically adjusting the voltage 3 of an electrical network having a first voltage 1 and an electrical network...  
WO/2013/179475A1
A transformer device, provided with: a primary coil (3), which receives an AV voltage; and a plurality of secondary coils (4a, 4b) having different numbers of windings, each of the secondary coils (4a, 4b) separately having first termina...  
WO/2013/170405A1
A changeover selector with a vacuum arc-extinguishing circuit comprises: a central shaft (601); a moving contact (603) driven by the central shaft to rotate; and a first fixed contact (604) and a second fixed contact (605) which are circ...  
WO/2013/170404A1
A switching structure of moving contacts and fixed contacts of a tap selector comprises an insulating switch base plate, at least two fixed contacts (101, 102, 103; 401.1, 401.2, …, 401.9), at least one rotary shaft (300; 405), and at ...  
WO/2013/167372A1
A secondary distribution network transformer for supplying power to the secondary distribution network is specified, having: - an active part with primary and secondary windings for transforming a primary medium voltage into a secondary ...  
WO/2013/160089A1
The invention relates to an on-load tap changer for switching between different winding taps of a tap-changing transformer without interruption. The aim of the invention is to provide an on-load tap changer with vacuum switching tubes, w...  
WO/2013/150811A1
The present invention enables an inductance value to be easily changed even when handling a large amount of high-frequency power. This variable inductor is equipped with: a first stationary section that is made of a conductor extending i...  
WO/2013/142919A1
Described herein are fault current limiters including an input terminal for electrically connecting to a power source that provides an AC load current, and an output terminal for electrically connecting with a load circuit that draws the...  
WO/2013/131663A1
The invention relates to an arrangement of an air-core inductor (10) and a changeover switch (12), in particular a changeover means or a load-stage changeover switch, wherein the air-core inductor (10) has windings (20). In the arrangeme...  
WO/2013/131664A1
The invention relates to a tap switch for voltage regulation with semiconductor switching elements on a regulating transformer having a regulating winding. The tap switch is of modular design, wherein each module comprises in each case a...  
WO/2013/127835A1
The invention relates to a voltage converting device comprising at least one transformer (12) which is provided for supplying an output voltage (Uout) on the basis of an input voltage (Uin), which comprises an input-side winding unit (30...  
WO/2013/124090A1
The invention relates to a stepping switch, which is provided with a preselector, for interruption-free control on a control transformer, wherein the control transformer has one or more main windings and a stepped winding, wherein the st...  
WO/2013/120642A1
The invention relates to a transformer with an on-load tap-changing device, wherein optionally the primary or secondary side can be regulated by means of the on-load tap-changing device, and wherein, on the side of the transformer to be ...  
WO/2012/126884A3
Voltage regulator (10), suitable for being connected in series between on the one hand an AC source (S) and on the other hand a load (C), comprising a magnetic circuit (2) comprising a first core (21) and a second core (22), at least one...  
WO/2013/100429A1
The present invention provides a fault current limiter which can reduce an abnormal current, such as a fault current, in a power system through the magnetic turn-off which increases the reactance of an electric circuit by changing the ma...  
WO/2012/126860A3
A controller for a transformer having a transformation ratio, wherein the transformer has an input configured to receive an AC power source and an output configured to provide an output voltage for a load system. The controller is config...  
WO/2013/082668A1
Described herein are fault current limiters including an input terminal for electrically connecting to a power source that provides a load current, and an output terminal for electrically connecting with a load circuit that draws the loa...  
WO/2013/080298A1
A transformer (50) is provided with: an iron core (10); a primary side winding (3) wound around the iron core (10); a secondary side winding (4) wound around the iron core (10) aligned with the primary side winding (3); and a differentia...  
WO/2012/104232A3
The invention relates to a stepping switch for voltage control, comprising semiconductor switch elements on a variable transformer having associated regulating windings. The stepping switch has a modular design, wherein each module compr...  
WO/2013/014251A3
The invention relates to a switching device (1) for bridging a fault current circuit breaker (21), a first input (2) being connected to a first output (4) by means of a first conductor (6) and a first switching-contact pair (7), and a se...  
WO/2013/018072A3
An impedance emulator device (5-8, 15) which is variable in a controlled manner comprises an inductor (L) connected between a first and a second terminal (2, T), an ordered array (5) of solid-state electronic switches (Ql, Q2), connected...  
WO/2013/048348A1
The tester and the procedure of testing to determine the quality of magnetic circuits is based on pulse excitation and hysteresis control of primary current. The magnetic characteristic of the tested transformer iron core is evaluated on...  
WO/2013/048908A1
A switchable transformer architecture is disclosed. The switchable transformer includes a primary winding, a secondary winding, and a tertiary winding, in which either the secondary winding or the tertiary winding establish a signal path...  
WO/2013/042685A1
Provided are an energy-storing mechanism having a forced supply mechanism and achieving a reduction in space, and an on-load tap changing device comprising the energy-storing mechanism. An energy-storing mechanism has a spring (26), a wi...  
WO/2013/030139A1
The invention relates to a dry-type transformer comprising a winding (101) with a tapping zone (110), the tapping zone (110) being the zone wherein at least two connections can be made, allowing to change the number of turns of the windi...  
WO/2013/030571A1
A fault current limiter (FCL) includes at least one magnetisable core member and at least one AC magnetomotive force source configured to generate a varying magnetic flux in at least a portion of the at least one magnetisable core member...  
WO/2013/029688A1
A current limiter (10) comprises at least one core element (12), the or each core element (12) include anisotropic magnetic material, and at least one electrically conductive wire (14) being wound to define a coil (16) enclosing a portio...  
WO/2012/028839A3
A transformer based voltage optimization apparatus (201) configured for use as a component of an electrical circuit that comprises a load (202) comprises a first transformer arrangement (203) specifically configured with means to transfo...  
WO/2013/025701A1
Tap covers and projections for an electrical device are provided. The tap projections have bosses or taps raised from a surface of the tap projection and encapsulated with a resin except for an outer surface of the bosses or taps. The ta...  
WO/2013/018107A1
An electrical energy transformation assembly (1 ) supplied by a power source (A) for appropriately supplying power to a load (L) that comprises a primary winding (2) connected to the power source (A) and electromagnetically coupled to a ...  
WO/2013/018108A1
An energy-saving device (1) inserted between a three-phase power supply (A) and a three-phase load (L), comprising a three-phase electrical transformer (10), each phase of which includes a transformation assembly (1 1) with a primary win...  
WO/2011/141081A3
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/2013/018072A2
An impedance emulator device (5-8, 15) which is variable in a controlled manner comprises an inductor (L) connected between a first and a second terminal (2, T), an ordered array (5) of solid-state electronic switches (Ql, Q2), connected...  
WO/2011/141076A3
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...  

Matches 101 - 150 out of 6,611