| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 361058000 | Impedance insertion | 33 |
| 20080232014 | Electric fault current limiter having superconducting elements inside a cryogenic vessel and bushings for connecting an external circuit - Electric fault current limiter has superconducting elements inside a cryogenic vessel and bushings for connecting an external circuit. The electric fault current limiter ( | 09-25-2008 |
| 20080247106 | Reduction of Inrush Current Due to Voltage Sags - Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage ( | 10-09-2008 |
| 20080266732 | TRIP INDICATOR MEMBER, AND LIMITER AND ELECTRICAL SWITCHING APPARATUS INCLUDING A PLURALITY OF TRIP INDICATOR MEMBERS - A limiter includes three current limiters. Each current limiter includes a first end disposed proximate a first housing surface and electrically connected to a corresponding first terminal, a second end disposed proximate a second housing surface and electrically connected to a corresponding second terminal, an elongated body disposed between the ends, and a plunger. Two plungers define a straight line and a third plunger is offset from the straight line. Three indicator members each include a first end, an indicator disposed therefrom, and an opposite second end, which is engaged by a corresponding plunger. The indicator is disposable through a corresponding housing opening. Three springs bias corresponding indicator members away from the second housing surface. The housing carries two indicator members in a first orientation and a third indicator member in a different second orientation. The indicators are positioned in a straight line and are disposable through corresponding housing openings. | 10-30-2008 |
| 20090009918 | High-voltage X-ray generator - A power supply for a device which has a load, comprising a first resonant generator and a second resonant generator, coupled in parallel, each generator having a phase output. The power supply further comprises a control circuit coupled to the first and second generators controlling the first and second phase outputs, wherein the first phase output and the second phase output are summed to provide a variable power supply to the load. | 01-08-2009 |
| 20090021875 | FAULT CURRENT LIMITERS (FCL) WITH THE CORES SATURATED BY SUPERCONDUCTING COILS - A current limiting device ( | 01-22-2009 |
| 20090067108 | CLOSING RESISTOR FOR HIGH-VOLTAGE CIRCUIT BREAKERS - A closing resistor arrangement for a high-voltage circuit breaker has a large number of resistor elements and a large number of cooling elements, the cooling elements being arranged in series with one another and being connected electrically in series with one another. The resistor elements, which electrically connect the electrical cooling elements to one another, are arranged between in each case two cooling elements which are arranged in series. | 03-12-2009 |
| 20090109585 | SERIES SURGE SUPPRESSION STRUCTURE - A series surge suppression structure mainly comprises: a circuit board, a ground line and a plurality of galvanization circuits being disposed thereon, a multilayer surge absorption unit being disposed in series on the ground line and the plurality of galvanization circuits; wherein each surge absorption unit is constituted by a pair of chokes with a layered surge absorption element connected in parallel between one end of either choke and the ground line; a power connection terminal, positioned on one side of the circuit board and electrically connected to a final end of the multilayer surge absorption unit; and a protection terminal, positioned on another side of the circuit board and electrically connected to a final end at another side of the multilayer surge absorption unit; whereby, the protection terminal can be used to connect with a communication circuit or an electric facility and the power connection terminal is used for connecting with an external wire so as to form a multilayer surge absorption protection by means of series connection. Meanwhile, a derivative module may be conveniently manufactured to allow multiple modules to be connected together and expand to use as a three-phase multilayer surge absorption protection thereby expanding a use range to attain to the surge substantially suppressing effect. | 04-30-2009 |
| 20090207542 | VOLTAGE SURGE PROTECTION DEVICE AND ELECTRONIC CIRCUIT COMPRISING ONE SUCH A DEVICE - The voltage surge protection device comprises at least one input designed to be connected to an electric power supply system, at least one output designed to be connected to an electric circuit to be protected, and voltage surge limiting means connected between the inputs and outputs to protect said electric circuit against voltage surges able to be applied on the inputs. The voltage surge limiting means comprise bidirectional series electronic limiting means comprising at least two inputs/outputs connected in series with at least one of said inputs, and which are turned on when a low voltage drop occurs when a circulating current is lower than a current limiting value, and limiting said circulating current by increasing a voltage drop between said inputs/outputs. | 08-20-2009 |
| 20090231767 | Electronic device with electricity leakage protection - An electronic device with electricity leakage protection includes a ground wire, a system ground unit, and a protective element connected electrically at one end to the ground wire and at another end to the system ground unit. The protective element limits flow of electrical current through the ground wire into the system ground unit. | 09-17-2009 |
| 20090262477 | SHORT-CIRCUIT CURRENT LIMITER - In order to provide a power semiconductor module for power distribution and transmission, having a power semiconductor circuit which is connected via connecting lines to an energy storage device, which limits the current amplitudes that occur in the electrical fault and effectively protects the power electronics, it is proposed that the connecting lines have a weak point which breaks when the current load is above a threshold value, with the connecting lines furthermore having a resistance which is connected in parallel with the weak point. | 10-22-2009 |
| 20090296298 | Active Current Surge Limiters - Active current surge limiters ( | 12-03-2009 |
| 20090303646 | CONTROLLING APPRATUS AND CONTROLLING METHOD FOR SIGNAL OUTPUTING CIRCUIT AND VIDEO SYSTEM - The invention discloses a controlling apparatus for a signal outputting circuit in an electronic system. The controlling apparatus includes a detecting circuit, a switch, and a controlling circuit. The detecting circuit is used for detecting whether the electronic system has an abnormal condition. The switch is electrically connected between a signal receiving terminal and the signal outputting circuit. The controlling circuit is electrically connected between the detecting circuit and the switch. Once the detecting circuit detects that the electronic system has the abnormal condition, the controlling circuit sets the switch into a high-impedance state. | 12-10-2009 |
| 20090323240 | DEVICE FOR SUPPRESSING HIGH FREQUENCY CURRENT OR/AND VOLTAGE COMPONENTS - The subject of the invention is a device for suppressing high frequency current or/and voltage components, applicable in protecting electrical equipment, especially against the effects of overvoltage in electrical power networks and stations. The inventive device is characterised in that it contains a series impedance element which is at least one magnetic core reactor ( | 12-31-2009 |
| 20100103574 | Transient blocking unit having an enhancement mode device in the primary current path - A transient blocking unit (TBU) is a circuit having series-connected transistors that normally conduct current, but automatically switch to a high-impedance current blocking state in response to an over-current condition. Here enhancement mode devices are used in the primary TBU current path, as opposed to the conventional use of depletion mode devices in this context. This approach provides two main advantages. The first advantage is that the dependence of TBU parameters on poorly controlled depletion mode device parameters can be reduced or eliminated. The second advantage is that such TBUs can provide over-voltage protection in addition to over-current protection. | 04-29-2010 |
| 20100149706 | REMOVABLE AND SHORT-CIRCUIT-AVOIDABLE LITHIUM BATTERY MODULE - A removable and short-circuit-avoidable lithium battery module mainly makes use of a protective device mounted between a control circuit and any two cells. Wherein, the protective device includes a base plate and a conductive surface connecting with the cell, an output tab connecting with the control circuit, and a protective unit mounted on the conductive surface and the output tab. Whereby, the conductive surface and the output tab have larger areas to respectively link the cell and the control circuit. While connecting with electricity, the cell and the control circuit would be more accurately connected. Moreover, the protective unit would become disconnected while the cell and the control circuit are fell and collided, so as to prevent the cell and the control circuit from the inaccurate connection and destruction. The present invention also facilitates to swiftly replace the protective device while it is damaged and to contribute a convenient utility. | 06-17-2010 |
| 20100149707 | Parallel Connected HTS Utility Device and Method of Using Same - A method of controlling fault currents within a utility power grid is provided. The method may include coupling a superconducting electrical path between a first and a second node within the utility power grid and coupling a non-superconducting electrical path between the first and second nodes within the utility power grid. The superconducting electrical path and the non-superconducting electrical path may be electrically connected in parallel. The superconducting electrical path may have a lower series impedance, when operated below a critical current level, than the non-superconducting electrical path. The superconducting electrical path may have a higher series impedance, when operated at or above the critical current level, than the non-superconductor electrical path. | 06-17-2010 |
| 20100165526 | APPARATUS, SYSTEM, AND METHOD TO PREVENT SMOKE IN A POWER SUPPLY POWERED BY A CURRENT LIMITED SOURCE - A positive temperature coefficient device is configured in parallel with a bypass switch and implemented at an input to a switching regulation stage of a switching power supply. A monitoring module determines that a voltage across the regulation switch in the switching power supply is below a predefined threshold voltage for greater than a predefined threshold time period. A control module controls operation of the bypass switch. The control module opens the bypass switch in response to the monitoring module determining that the voltage across the regulation switch is below the predefined threshold voltage for greater than the predefined threshold time period such that substantially all of the current entering the switching regulation stage passes through the PTC device. By causing substantially all of the current to pass through the PTC device, the device will enter a high impedance state thereby preventing smoke and smell from occurring. | 07-01-2010 |
| 20110013327 | Smart link coupled to power line - A smart link in a power delivery system includes an insulator, which electrically isolates a power line, and a switchable conductance placed in parallel with the insulator. The switchable conductance includes switchgear for sourcing, sinking, and/or dispatching real and/or reactive power on the power line to dynamically in response to dynamic loading, transient voltages and/or currents, and phase conditions or other conditions on the power line. | 01-20-2011 |
| 20110116198 | CONDUCTOR ARRANGEMENT FOR A RESISTIVE SWITCHING ELEMENT HAVING AT LEAST TWO COMPOSITE CONDUCTORS MADE FROM SUPERCONDUCTING CONDUCTOR BANDS - A conductor arrangement for a resistive switching element, has at least first and second conductor connections disposed in a mutual plane adjacent to each other and insulated against each other. The composite conductors each have two conductor parts extending parallel, and forming a bifilar construction. The conductor parts are constructed from at least one superconducting conductor band. The composite conductors are formed into a coil winding, wherein the windings thereof substantially extend in the manner of a spiral, and are insulated against each other by a spacer. | 05-19-2011 |
| 20110194220 | ESD Protection Integrated at System Level - An electronic system including an assembly with a protection clamp for discharging a portion of the incoming pulse, the un-discharged residual pulse ( | 08-11-2011 |
| 20120057262 | Low Voltage Transmitter with High Output Voltage - A transmitter comprises a protection circuit; a first termination resistor having a first end coupled to a first voltage source, and a second end coupled to the protection circuit; a second termination resistor having a first end coupled to the first voltage source, and a second end coupled to the protection circuit, wherein the second end of the first termination resistor and the second end of the second termination resistor form a differential output pair; a current switch coupled to the protection circuit; a current source coupled to the current switch; and a pre-driver circuit coupled to the current switch, for controlling the current switch, making the differential output pair generate an output current. Wherein, the pre-driver circuit receives a second voltage source, and the first voltage source is higher than the second voltage source. | 03-08-2012 |
| 20120063042 | Active Current Surge Limiters - Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal. | 03-15-2012 |
| 20120063043 | Active Current Surge Limiters - Active current surge limiters and methods of use are disclosed. One exemplary system, among others, comprises a current limiter, including an interface configured to be connected between a power supply and a load; a disturbance sensor, configured to monitor the power supply for a disturbance during operation of the load; and an activator, configured to receive a control signal from the disturbance sensor and to activate the current limiter based on the control signal. | 03-15-2012 |
| 20120154966 | FAULT CURRENT LIMITERS (FCL) WITH THE CORES SATURATED BY NON-SUPERCONDUCTING COILS - A current limiting device ( | 06-21-2012 |
| 20120268851 | SEMICONDUCTOR DEVICE - The invention provides a low cost semiconductor device with which it is possible to easily select IGBT soft shutdown characteristics appropriate to a system. | 10-25-2012 |
| 20130286522 | TECHNIQUES FOR DETECTING REMOVAL OF A CONNECTOR - A system that detects electrical disconnection of one connector from another connector includes a detection circuitry and a protection circuitry. The detection circuitry detects that a plug connector has been electrically disconnected from a corresponding receptacle connector. In response to the detection, the detection circuitry sends a signal to the protection circuitry. In response to the signal, the protection circuitry lowers or terminates power being supplied to a host device via one of the contacts of the plug connector. This helps to prevent shocks/shorts that may be caused by accidental disconnection of the plug connector. | 10-31-2013 |
| 20130301174 | Series Type Surge Suppressor and Clamping Circuit - Various embodiments relate to a degrade-resistant surge suppressor that detects and suppresses surge events. The surge suppressor includes a high impedance high pass filter, one or more series inductors, and one or more capacitor banks. The capacitor bank may include a bridge rectifier circuit having two diodes and two SCRs (Silicon-Controlled Rectifiers), or a diode bridge rectifier fed by a TRIAC (Node for Alternating Current). The surge suppressor may further include a secondary trigger device to ensure proper attenuation of surge events. | 11-14-2013 |
| 20130342943 | INPUT PROTECTION CIRCUIT - In an input protection circuit, one end of a resistive element of a protection circuit is connected to an intermediate impedance point of a terminating device, which is connected between a pair of external terminals of a low amplitude differential interface circuit. The other end of the resistive element is connected to an anode terminal of a diode element. A cathode terminal of the diode element is connected to a reference potential terminal. As a result, even when one of external terminals of a low-breakdown voltage circuit is erroneously in contact with a signal terminal (i.e., a bus terminal which is always pulled up via a high resistance resistor) of the socket to be pulled up to a high voltage, the elements forming the circuit are greatly protected from deterioration and damages at low costs, while maintaining the quality of transmission signals. | 12-26-2013 |
| 20140118871 | SURFACE MOUNTABLE OVER-CURRENT PROTECTION DEVICE - A surface mountable over-current protection device having upper and lower surfaces comprises a PTC device, first and second electrodes, and first and second circuits. The PTC device comprises a PTC material layer and first and second conductive layers. The PTC material layer is disposed between the conductive layers and comprises crystalline polymer and conductive filler dispersed therein. The first electrode comprises a pair of first metal foils, whereas the second electrode comprises a pair of second metal foils. The first circuit connects the first electrode and conductive layer, and has a first planar line extending horizontally. The second circuit connects the second electrode and conductive layer, and has a second planar line extending horizontally. At least one of the planar lines has a thermal resistance sufficient to mitigate heat dissipation by which the over-current protection device undergoes a test at 25° C. and 8 amperes can trip within 60 seconds. | 05-01-2014 |
| 20140240879 | High Voltage Electronic Switches for Controlling Direct Current Arcs in High Voltage Direct Current Systems and Methods of Operating the Same - High voltage direct current systems are provided including one or more outlets and an electronic current limiter circuit associated with the one or more outlets. The electronic current limiter circuit is configured to limit current inrush when a connector is plugged into and/or unplugged from the one or more outlets when a direct current bus associated with the one or more outlets is energized so as not to damage the connector; and/or isolate direct current faults and/or excess current draw in a load connected to the one or more outlets so as to protect the system from shutdown. | 08-28-2014 |
| 20140301004 | LOW-, MEDIUM-, OR HIGH-VOLTAGE SWITCHGEAR - A low-, medium-, or high-voltage voltage switchgear with a circuit breaker or circuit breakers is disclosed which can switch electrical equipment. To protect the switchgear, and the cirucuit breakers in the switchgear against so called spot welding under vacuum atmosphere, such as during a closing operation of a switchgear used, for example, for switching capacitive or inductive equipment or inductive or capacitive current network an inrush current limiter is placed electrically in line or in series with the current path of the circuit breaker. | 10-09-2014 |
| 20150333506 | FAULT CURRENT LIMITER - This specification relates to fault current limiter (FCL). More particularly, to solve problems of protecting and designing current limiting impedance in a protective coordination system, as limitations of the related art, the fault current limiter may measure heat capacity of a current limiting impedance unit by detecting fault current flowing to the current limiting impedance unit and limiting the fault current flowing to the current limiting impedance unit according to the measured heat capacity, which may result in preventing the current limiting impedance unit from being damaged due to the fault current, preventing an extended accident due to the damaged current limiting impedance unit and enabling a stabilized system and line protection. | 11-19-2015 |
| 20160049785 | PROTECTIVE CIRCUIT FOR A SIGNAL OUTPUT STAGE - A protective circuit for protecting an output stage in the event of faulty contacting of the electrical connections, wherein the output stage includes a driver unit and has an analog or digital signal output is provided. Accordingly, in order to protect the output stage from a faulty connection in a simple and economical manner, the protective circuit comprises a first transistor circuit, which is connected in series between the output stage and the signal output, and a second transistor circuit, which is connected in series between the negative supply connection and the signal output. The second transistor circuit is connected to the base of the first transistor circuit in order to influence the first transistor circuit in such a way that the first transistor circuit becomes highly resistive in the event of a fault. | 02-18-2016 |
