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| Number | Title | Issue Date |
| 8081406 | Thyristor controlled series capacitor module A thyristor controlled series capacitor module including a capacitor connectable in series with a power line, a thyristor valve connected in parallel with the capacitor, a breaker connected in parallel with the thyristor valve, and an inductor. By providing a simpli... | 12/20/2011 |
| 7660084 | Electric energy storage device and method of charging and discharging the same Disclosed are an electric energy storage device having a good cycle characteristic and a temperature characteristic and a method of charging and discharging the electric energy storage device. The electric energy storage device including a capacitor and a secondary ... | 02/09/2010 |
| 7365451 | Power converter A power converter that can continue to operate after suffering a partial failure. The power converter includes multiple array transformers; normally-on switches connected respectively in series with the ends of each of the primary windings of the array transformers;... | 04/29/2008 |
| 7364084 | Integrated circuits with persistent data storage The circuitry introduced in this invention selectively slows down the functioning of an electronic circuit by maintaining a particular state for a prolonged period of time. This circuitry is used not only to achieve the desired effect in maintaining security from el... | 04/29/2008 |
| 7262581 | Power supply A rechargeable power supply including voltage protection means through voltage dependent disconnecting means. A rechargeable power supply comprises at least one rechargeable cell connectable to a power source, a Zener diode connected to the at least one cell, and a ... | 08/28/2007 |
| 7256978 | Gapped ground safety device A gapped ground safety device is provided to protect workers on de-energized underground distribution cable from ground faults or accidental energization. The device comprises a combination precision gap and an MOV surge arrester. ... | 08/14/2007 |
| 7126322 | Circuit to characterize matching of energy-storage components A circuit to characterize the matching of energy-storage components is provided. The circuit includes a linear resistor and a power source. The circuit is electrically connected to two serially connected energy-storage elements, for example, a pair of capacitors. Th... | 10/24/2006 |
| 7092229 | Electrical filter/protector, and methods of constructing and utilizing same A device for an electrical power system having a nonlinear load. The circuit is connected in series with the nonlinear load and is tuned to the third harmonic of the power source frequency. The circuit substantially eliminates the harmonic currents and neutral curre... | 08/15/2006 |
| 7084638 | Intermediate circuit capacitor short-circuit monitoring The electronic monitoring circuit for monitoring one of a group of series-connected capacitor units in an intermediate circuit in order to detect short-circuiting of one of the capacitor units includes a device for deriving a reference voltage (14) from an in... | 08/01/2006 |
| 7082022 | Circuit for diverting surges and transient impulses A circuit for attenuating a surge is disclosed that might include a conductor for receiving the surge, a capacitor, positioned along the conductor, for blocking the surge, and a gas tube having a first end coupled to the conductor and a second end coupled to a groun... | 07/25/2006 |
| 7054173 | Circuit with DC filter having a link fuse serially connected between a pair of capacitors A circuit that includes a filter and a DC bus is provided that reduces the potential for failure of a second capacitor of the filter in the event a first capacitor shorts. The filter is electrically connected across the DC bus and includes serially connected capacit... | 05/30/2006 |
| 6992875 | Electronic device including parts forming a voltage transformer An electronic device, in particular a control unit including an electromagnetic actuator, whose coil is at the same time part of a voltage transformer. The coil is connected through a switch to an operating voltage potential or to a reference potential. A capacitor ... | 01/31/2006 |
| 6963641 | Method and apparatus for providing variable attenuation to data signals in an XDSL frequency range An apparatus, system and method for providing variable attenuation to data signals in an xDSL frequency range are disclosed. An attenuation device has a resistive circuit coupled to a capacitive circuit that prevents telephone signals from being attenuated by the re... | 11/08/2005 |
| 6956458 | Arrester disconnector assembly having a capacitor A disconnector assembly is provided for an arrester. A non-conductive housing has first and second opposite ends separated by an internal chamber. A first electrical terminal is connected at the first end. A second electrical terminal is connected at the second end.... | 10/18/2005 |
| 6919695 | Overvoltage protection for hid lamp ballast The present invention relates to a device for operating a high-pressure discharge lamp, comprising a switched mode power supply circuit (SMPS) for supplying power to the high pressure discharge lamp from a supply voltage, the power supply circuit comprising a half b... | 07/19/2005 |
| 6912108 | Protective equipment for a series-capacitor installation A series-capacitor installation intended to be placed on a platform, insulated towards ground, for connection into a power line (L) for carrying a line current (IL) has a first and a second capacitor group (C1 and C2, respectively). The capacitor group... | 06/28/2005 |
| 6788166 | Harmonic wave distortion suppressor A harmonic wave distortion suppressor includes a main body, at least a connecting pin and a coating. The main body is made of a first material and covered with a second material for absorbing an instantaneous high voltage or sharp wave. The connecting pin is coupled... | 09/07/2004 |
| 6753792 | Distribution line capacitor monitoring and protection module A device comprising a fault detector and communications module. The communications module can transmit and receive information and data via a commercial two-way wireless system, which may include two-way paging technology. The inventive device is capable of measurin... | 06/22/2004 |
| 6567256 | Dual protective relay for power systems The relay obtains three-phase current signals from two power line sources thereof, typically two independent feeder lines. The two sets of signals are processed by a single processing means, which independently controls the circuit breakers associated wit... | 05/20/2003 |
| 6336059 | Reach-measurement method for distance relays and fault locators on series-compensated transmission lines using local information A reach-measurement method is used in connection with a series-compensated line of a power system. The series-compensated line includes an installed series capacitance having a bus side and a line side, and a non-linear protection device parallel to the i... | 01/01/2002 |
| 6223113 | Default modes of a transmission utilizing electro-hydraulic clutches In machines having electro-hydraulic transmission controls, it is desirable to ensure that in the event of an electrical malfunction or power failure the transmission responds appropriately. In the subject invention, a system is provided in a transmission... | 04/24/2001 |
| 6075378 | Electrical energy storage capacitor power supply capable of shorting out defective capacitors There is disclosed a power supply for storing electrical energy in capacitors connected in series, the power supply having a function of shorting out capacitors at fault. Shorting means are connected in parallel with the capacitors, respectively. If any o... | 06/13/2000 |
| 5519563 | Protection circuit for electric cells from overcharge and overdischarge using a plurality of detection units of a single chip type In a protection circuit for protecting a plurality of chargeable electric cells by detecting overdischarge and overcharge by detection circuits for respective electric cells to control a protection switch upon detection, the detection circuit is a single ... | 05/21/1996 |
| 5510942 | Series-capacitor compensation equipment This series-capacitor compensation equipment comprises a series-capacitor bank in series with a power line and an overvoltage protection circuit for the capacitor bank comprising the series combination of a surge arrester and electric bus structure connec... | 04/23/1996 |
| 5475272 | Power capacitor A power capacitor (30, 40) composed of a plurality of parallel-connected strings (36) of capacitor elements (33,43), wherein each string comprises a plurality of series-connected capacitor elements, said parallel strings are interconnected at their end po... | 12/12/1995 |
| 5392184 | Method and apparatus for relieving a capacitor of a controlled series compensator as a function of the load on its arrester A method and an apparatus for relieving a capacitor of a controlled series compensator as a function of the load on its arrester when high-current line faults occur. The current flowing through the arrester is used to determine its absorbed energy, from w... | 02/21/1995 |
| 5345161 | Power supply system for an electromagnetic riveting apparatus The power supply, useful with an electromagnetic force apparatus such as a riveter or a bolt inserter, includes two capacitor banks which are charged through charging doubler modules. Each charging doubler module includes an AC capacitor which is responsi... | 09/06/1994 |
| 5325259 | Overvoltage protection for series capacitor equipment An overvoltage protective device for a series capacitor (C) has a main spark gap and a first auxilary spark gap, arranged adjacent thereto, for ignition of the main spark gap. A second auxiliary spark gap is arranged in association with the first auxiliar... | 06/28/1994 |
| 5063340 | Capacitive power supply having charge equalization circuit A capacitive power supply having a charge equalization circuit. The charge equalization circuit is comprised of a shunt circuit connected in a parallel connection with capacitive elements of the capacitive power supply. Once a charging current is applied ... | 11/05/1991 |
| 5016135 | Power supply incorporating circuit breaker and fault detection circuit A power supply incorporating a fault detection circuit controlling a circuit breaker is described. The power supply is isolated from relatively large applied DC voltages. This isolation is provided by a coupling capacitor in each of the line leads. The tr... | 05/14/1991 |
| 4975796 | Reverse discharge diode capacitor A device which enables a self-healing capacitor with more than one group of sections in series to undergo repetitive clearing without generating the resulting potential differences between the series sections which causes additional failures. In one embod... | 12/04/1990 |
| 4956739 | Device for locating internal faults in a high-voltage capacitor battery A device to locate internal faults in a high-voltage capacitor battery that has a plurality of symmetrically parallel and series-coupled capacitor banks arranged in parallel branches coupled by shunt branches. The phase angles of the shunt currents flowin... | 09/11/1990 |
| 4926280 | Capacitor protection circuit for protecting storage capacitors in an electronic power supply A capacitor protection circuit for protecting bulk storage capacitors in a storage capacitor circuit in an electronic power supply. The capacitor protection circuit is operatively coupled to the storage capacitor circuit and comprises a first and second t... | 05/15/1990 |
| 4922364 | Series capacitor equipment Series capacitor equipment for distribution networks has a capacitor, voltage-dependent resistors as over-voltage protective means for the capacitor, a mechanical high-speed circuit-closer and a switch connected in parallel with the high-speed circuit-clo... | 05/01/1990 |
| 4890180 | Series capacitor equipment Series capacitor equipment is connected into an electric power transmission line (L) and has a capacitor bank with a first part (CO) series-connected with a second part (C1-Cn) with variable capacitance. For protection against overvoltages, a first spark ... | 12/26/1989 |
| 4860156 | Overvoltage protective circuit A trigger circuit for a spark gap chain with at least two series-connected spark gaps, of which at least one is provided with at least one trigger electrode, includes a resistor chain which is connected in parallel with the spark gap chain and comprises a... | 08/22/1989 |
| 4805063 | Fault detector for detecting faults in a DC capacitor circuit A fault detector for detecting faults in a DC capacitor circuit connected to the DC buses of an inverter circuit using semiconductor device for converting direct current into alternating current to suppress the voltage pulsation and comprising a plurality... | 02/14/1989 |
| 4750076 | Geometric arrangement for filter capacitors A geometric arrangement for filter capacitors used in high frequency power supplies such that a multiplicity of paralleled capacitors not only share the current but also provide optimum filtering. The terminals of each of the capacitors are connected by e... | 06/07/1988 |
| 4703385 | Protective circuit for series capacitor banks As overvoltage protection for a series capacitor (C1-C5) in a high-voltage network a voltage-dependent resistor (Z6), built up of metal oxide varistors, is arranged in parallel with the capacitor. In parallel with the resistor there is a spark gap means c... | 10/27/1987 |
| 4669031 | Light box for photographic use A photographic light box comprised of a housing having a side wall with a pair of opposed ends, one of the ends being larger than the other end and the side wall progressively increasing in cross section as the smaller of the two ends is approached. A pan... | 05/26/1987 |
