Class 323/341 - With motor driven tap switch

Subclass of Class 323 - Electricity: power supply or regulation systems
Definition: Subject matter wherein the means to select between the several
No. of patents: 36
Last issue date: 10/07/2008

Number	Title	Issue Date
7432697	Universal input device for a tap changer A control system providing a universal input for receiving a control signal for actuating tap-changing equipment. The system accommodates virtually any signal voltage level commonly used for control of the tap-changing equipment, modifies the received signal to a de...	10/07/2008
7323852	Sensing load tap changer (LTC) conditions A load tap changer (LTC) having a plurality of windings is coupled to one of the primary and secondary of a power transformer in order to regulate the output voltage of the transformer. The LTC includes a plurality of taps physically and electrically connected to an...	01/29/2008
7319309	Load tap change monitoring system and method A system and method for remotely monitoring load tap changes on utility-type equipment are disclosed. In one example embodiment, a sensor measures a voltage before a tap change and compares the measured voltage to a voltage after the tap change. From this informatio...	01/15/2008
7274547	Electrical power supply system and a permanent magnet generator for such a system An electrical power supply system including an engine driven permanent magnet generator (11) operable to produce a variable voltage and high frequency output which is converted by a series train AC/AC conversion circuit (14) into a fixed voltage and re...	09/25/2007
7023193	Elimination of potential transformer in ANSI Type A voltage regulator An ANSI Type A voltage regulator that eliminates the need for a potential transformer is disclosed. A control unit finds an output voltage by constantly monitoring the input voltage across the utility windings and the stored tap position. The value of the output vol...	04/04/2006
6944002	Automatic transfer switch and protection device An automatic transfer switch and protection device is provided. The device includes a contact, a drive assembly, and a controller. The contact is movable among a first position, a second position, and a third position. The drive assembly moves the contact among the ...	09/13/2005
6833518	Load tap changer with direct drive and brake A rotary tap changer is connected to a power source to control voltage supplied from the power source to a load. The rotary tap changer includes a motor having an output device, and a drive sprocket having a drive shaft positioned perpendicularly to a plane of rotat...	12/21/2004
6693247	Load tap changer with direct drive and brake A rotary tap changer is connected to a power source to control voltage supplied from the power source to a load. The rotary tap changer includes a motor having an output device, and a drive sprocket having a drive shaft positioned perpendicularly to a pla...	02/17/2004
6664771	Power regulation of electrical loads to provide reduction in power consumption A power regulation system is coupled to an AC power source outputting an input voltage. The system has a first transformer to receive the input voltage and generate a control voltage. The system also has a second transformer that has a primary coil and a ...	12/16/2003
6529858	Method of controlling step switches A method of controlling a step switch. From the measured values of current, voltage and phase angle at an electric drive motor during actuation of the step switch the individual picked-up active output is calculated. From the active output the correspondi...	03/04/2003
6486641	Power regulation of electrical loads to provide reduction in power consumption A power regulation system is coupled to an AC power source outputting an input voltage. The system has a first transformer to receive the input voltage and generate a control voltage. The system also has a second transformer that has a primary coil and a ...	11/26/2002
6396248	Versatile power flow transformers for compensating power flow in a transmission line A power flow transformer implements power flow control in a transmission line of an n-phase power transmission system, where each phase of the power transmission system has a transmission voltage. The transformer has n secondary windings, where each secon...	05/28/2002
6335613	Versatile power flow transformers for compensating power flow in a transmission line A shunt compensating power flow transformer implements power flow control in a transmission line of an n-phase power transmission system, where each phase of the power transmission system has a transmission voltage. The transformer has n primary windings,...	01/01/2002
6307283	Position signalling device for a motor drive A position indicator for step switches and tap selectors of transformers and the like has a contact array connected to the motor drive and connected by a plug to the plug of a connector which, in turn, is connected by plugs to the information-generating m...	10/23/2001
6124726	Method of monitoring a tap selector A tap selector for a power transformer switchable under load is monitored by detecting the effective values of current and voltage of the drive motor of the tap changer. The power is calculated and from that the instantaneous torque and the latter is comp...	09/26/2000
5952739	Remotely operated meter disconnect switch Multiple pairs of stationary and moveable contacts are toggled simultaneously between an open and closed position to disconnect or connect a meter from or to a line power source, by a reciprocating operator driven by low power clock motor. The operator is...	09/14/1999
5920467	Power converter for converting AC shore power to shipboard use A power converter for converting shore power voltage, phase, and frequency for shipboard use includes a variable inductance input transformer that can be connected to the shore power. The primary windings of the transformer have a plurality of taps, and a...	07/06/1999
5804953	Power converter for converting AC shore power to shipboard use A power converter for converting shore power voltage, phase, and frequency for shipboard use includes a variable inductance input transformer that can be connected to the shore power. The primary windings of the transformer have a plurality of taps, and a...	09/08/1998
5786552	Switching arrangement for load change-over switches of step switches and for selector switches The invention concerns a switching arrangement for load change-over switches of step switches and for selector switches, wherein two switching contacts movable in two directions are present. The first switching contact is in the form of a main switching c...	07/28/1998
5773970	Tap changer with tickler coil for arcless tap changing A tap changer in which a pair of selector contacts can be jointly movable or individually movable to engage stationary tap contacts of an array and one of the selector contacts is in series with a tickler coil and switchover resistor connected to one fixe...	06/30/1998
5642290	Expansion chassis for a voltage regulator controller A voltage regulator controller having integral expansion ports. The expansion ports are provided by way of an I/O expansion chassis which is electrically coupled to the controller's microprocessor....	06/24/1997
5528110	Apparatus for control of load power consumption An improved voltage reduction apparatus specifically designed to overcome implementation problems of a prior art voltage reduction apparatus. The present invention is designed to overcome the problem of magnetic field flux induced harmonic distortion and ...	06/18/1996
5523674	Step switch The invention relates to a load selector for step switches in step transformers with two movable selector contacts. A suitable vacuum switch is located downstream of the first movable selector contact to switch the load current and a suitable switch for s...	06/04/1996
5516992	Transformer tap changing and step switch assembly A cast-resin transformer has a transformer housing, a plurality of windings each having a plurality of taps, respective contacts connected to the taps and mounted on the housing in respective arrays which are all identical, and respective identical mounti...	05/14/1996
5477113	Apparatus for applying a variable voltage to an electric load An apparatus for applying a variable voltage to an electric load utilizes a transformer with several taps to provide different voltage levels for the load. The load is connected to alternate taps by a switching device, which is operated by a control devic...	12/19/1995
5107200	Load switch for a step transformer A switching system for a step transformer having at least two adjacent taps and a pair of terminals shiftable between the taps has a pair of fixed contacts normally connected to the terminals, a vacuum interrupter connected between the terminals and displ...	04/21/1992
5055766	Voltage regulator compensation in power distribution circuits An electronic device for compensating voltage fluctuations in an electrical power distribution circuit controls operation of a transformer of the type having a TCUL voltage regulator by automatically calculating the voltage bandwidth of the transformer ba...	10/08/1991
4591831	Position angle transducer for tap changing transformers A position angle transducer for voltage compensating tap changing transformers provides secondary tap number or tap position analog output signals which accurately reflect the secondary tap position even if a non-linear relationship obtains between the sh...	05/27/1986
4577146	Variable autotransformer having an indexed stepping brush An adjustable voltage transformer having a commutating surface formed of segments of electrical conductors upon which a contact brush is movable while in electrical engagement therewith. Means are provided to "step" the brush between segments, so that whe...	03/18/1986
4540934	Device for the fine adjustment of the output voltage of multi-phase regulating transformers A multi-phase regulating transformer is disclosed having a plurality of windings cooperating with stepping trolleys which are driven by a common driving member. To obtain fine adjustment of the output voltage, the trolleys are coupled to the driving membe...	09/10/1985
4388664	Apparatus for protecting vacuum interrupter type on-line tap changer An apparatus for protecting a vacuum interrupter type on-line tap changer in which a cross current flows between taps through a current limiting resistor for a predetermined time by shorting selected taps therebetween at the time of tap changing operation...	06/14/1983
4386333	Universal electrical connection apparatus Different line-cord sets connect an electrical device to different supply voltages, assuring that the supply voltage matches the device. Each line-cord set has a uniquely keyed socket and a wall plug. A device receptacle receives the line-cord's keyed soc...	05/31/1983
4384247	Under-load switching device particularly adapted for voltage regulation and balance An under-load switching device particularly adapted for use with a transformer having voltage taps for voltage regulation and for balancing the phase voltages in a multi-phase AC power system includes a pair of rotary tap selectors connected in parallel t...	05/17/1983
4336490	Voltage sensing apparatus for a voltage regulating transformer An automatic voltage regulating transformer is provided which incorporates a potential transformer electrically disposed across its series windings, and a set of sensing windings disposed across its shunt windings to provide a voltage sensing network whic...	06/22/1982
4309651	Wide range voltage regulator circuit A wide range voltage regulator circuit exhibiting minimum circuit impedance at maximum output voltage employs a pair of regulating windings in series having their movable contact controlled by a plurality of normally open and normally closed limit switche...	01/05/1982
4168461	Voltage regulator providing wide range of voltage regulation A voltage regulator to provide a wide range of regulation, especially useful with process control. The regulator is provided with an extra bushing connected to the exciting winding of the regulator. By this means two or more regulators may be connected wi...	09/18/1979

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Class 323/341 - With motor driven tap switch