Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 901 - 950 out of 12,865

Document Document Title
WO/2012/021681A3
An apparatus and method for providing an intrinsically safe (IS) thermistor detector circuit for process gas chromatography is disclosed. The IS thermistor detector circuit includes a thermistor, a reference resistor connected to the the...  
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/2012/012426A3
A continuous grounding system for use in an alternating current system including a transformer is disclosed. The system includes a switch assembly connected between a transformer neutral of a transformer and a ground, the switch assembly...  
WO/2012/035430A3
A thermal foldback circuit protects a lamp circuit component from overheating by limiting power to the lamp in response to an over-temperature condition. The amount of limiting is adjusted based at least in part on an input from an exter...  
WO/2012/030963A3
Methods and apparatus to clamp overvoltages for inductive power transfer systems are described. An example overvoltage protection circuit has a first terminal (130) configured to receive an alternating current signal for conversion to a ...  
WO/2012/050610A1
A connector assembly (10) with integrated protection circuitry including a plug subassemby (12) and a sensor connector subassembly (14).The sensor connector subassembly is selectively connectable to the plug subassembly. A circuit board ...  
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/2012/045610A1
The invention relates to a surge protection device (5). The surge protection device (5) has an arrester (1). The arrester (1) should produce an equalization between different potentials and arrest a surge current during use. A sensor (2)...  
WO/2012/045795A1
Described herein are arrangements and methods for achieving intrinsic safety for a radio transmission module. One aspect provides an apparatus for transmitting signals in an explosion-hazardous area with intrinsic safety, including: a ra...  
WO/2012/037770A1
A new method for protecting thyristors in a direct-current converter valve from discontinuous currents is provided. During the normal working process of the direct-current converter valve, a thyristor is triggered normally when the volta...  
WO/2011/124605A3
A method for the operational control of an inverter (4) designed for DC/AC voltage conversion that has at least one direct-voltage input (2, 3) and that can be connected to a power supply grid via at least one alternating-voltage output ...  
WO/2012/030765A1
High voltage direct current systems are provided including one or more outlets (115) and an electronic current limiter circuit associated with the one or more outlets. The electronic current limiter circuit is configured to limit current...  
WO/2012/030963A2
Methods and apparatus to clamp overvoltages for inductive power transfer systems are described. An example overvoltage protection circuit has a first terminal (130) configured to receive an alternating current signal for conversion to a ...  
WO/2012/028575A1
The invention relates to a circuit for limiting current, having a thermal resistor disposed in a current path to a consumer, and having a switch for bypassing the thermal resistor. The invention further relates to a corresponding method ...  
WO/2012/003113A3
A grounding switch is described which operates properly even in the presence of negative voltages on a signal line. The grounding switch uses isolated field effect transistors that have their substrates tied to different voltages. The is...  
WO/2011/143320A3
A surge suppressor device includes a first housing defining a first cavity, input and output conductors disposed in the first cavity of the first housing, a capacitor connected in series with the input conductor and the output conductor,...  
WO/2012/024014A1
In some embodiments, an electrical device can include: (a) an electrical power input configured to receive an input electrical power signal, the input electrical power signal includes a reference power line signal; (b) a power supply con...  
WO/2012/023524A1
A magnetizing inrush current suppression device (6) that suppresses magnetizing inrush current in a three-phase, concurrently operating circuit breaker (2) that opens and closes a connection between a power source bus (1) and a modified ...  
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/2012/013046A1
The present invention provides a mobile terminal, which includes: a charging port, a Power Management Unit (PMU), a battery and an anti-surge protective circuit for charging set between said charging port and said PMU. Said anti-surge pr...  
WO/2012/013165A1
The apparatus represents a controlled current source (1) that is connected in-between a transformer neutral point (3) and the earth potential. It works not only as a compensator of ground fault currents and higher harmonics of fault curr...  
WO/2012/013166A1
The apparatus represents a controlled current source (1) that is connected in-between phase conductors of the transformer (3) of the distribution system and the earth potential. It works not only as a compensator of ground fault currents...  
WO/2011/095375A3
The invention relates to a circuit assembly for de-excitation of an excitation coil (E) of a synchronous machine in case of an error having a control circuit (1) for controlling a current flow through the excitation coil (E), wherein a p...  
WO/2012/012426A2
A continuous grounding system for use in an alternating current system including a transformer is disclosed. The system includes a switch assembly connected between a transformer neutral of a transformer and a ground, the switch assembly...  
WO/2012/003113A2
A grounding switch is described which operates properly even in the presence of negative voltages on a signal line. The grounding switch uses isolated field effect transistors that have their substrates tied to different voltages. The is...  
WO/2012/003114A1
Apparatus and methods for providing transient electrical event protection are disclosed. In one embodiment, an apparatus (10) comprises a detection and timing circuit (21), a current amplification circuit (22), and a clamping circuit (23...  
WO/2011/160116A1
A fault current limiter (406) that maximizes transient stability by minimizing the power swing experienced by the generator during a fault condition is disclose. A superconducting fault current limiter (SCFCL) (407) is used, whereby the ...  
WO/2011/159893A1
Several embodiments of a novel technique for limiting transmission of fault current are disclosed. Current power distribution systems typically have an impedance, or reactor; on the output of the network equipment to limit current In the...  
WO/2011/139459A3
An overvoltage protection circuit (10) may include a reference voltage generator (22), a trigger circuit (44), and a clamping device (32). The reference voltage generator (22) is for providing a reference voltage that is relatively const...  
WO/2011/119723A3
An Ethernet surge protector can be mounted externally and/or internally to a wall of a building. The Ethernet surge protection device may include a housing, a threaded port, and a surge filter. The housing may define a space along an axi...  
WO/2011/150828A1
A lightning protection circuit includes a lightning protection unit (1) and an interface (2) which are electrically connected with each other. The lightning protection unit (1) includes an internal connected terminal block (11), three pi...  
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/2011/150985A1
The invention concerns a method and a system for online ferroresonance detection in a high voltage electrical distribution network. The method includes: -Overflux detection (23),which acts as the start element, overflux being set if the ...  
WO/2011/056057A3
The invention relates to an apparatus for monitoring the power consumed by users connected to a distribution transformer, formed by: current intensity and voltage meters connected to each power supply line of each user; a processor conne...  
WO/2011/146402A1
Provided is a system, a tool and a method for communicating with a faulted circuit indicator (FCI), the faulted circuit indicator including a detection circuit for monitoring an electrical conductor of a power system. The system includes...  
WO/2011/141695A1
An electronic power conditioner circuit for use in an I EC 61 158 Fieldbus network comprising a series element, a capacitor and a resistor formed as a gyrator circuit, and a biasing circuit, in which said biasing circuit supplies a contr...  
WO/2011/143374A1
An overvoltage protection circuit includes a voltage clamping device having a predefined voltage threshold at which it starts conducting to prevent an overvoltage condition. A switch is operable to control a flow of current from a power ...  
WO/2011/143320A2
A surge suppressor device includes a first housing defining a first cavity, input and output conductors disposed in the first cavity of the first housing, a capacitor connected in series with the input conductor and the output conductor,...  
WO/2011/139459A2
An overvoltage protection circuit (10) may include a reference voltage generator (22), a trigger circuit (44), and a clamping device (32). The reference voltage generator (22) is for providing a reference voltage that is relatively const...  
WO/2011/139269A1
A converter module for a variable speed drive having a semiconductor device for precharge is described. The precharge circuit includes switching modules, one switching module with a first semiconductor switch connected in parallel or ser...  
WO/2011/139204A1
A victim unit (310, 410) connectable to a surge protective device (300, 400a) via an alternating current system or a direct current system, the victim unit (310) comprises at least one victim unit sensor (313a, 314a, 315) adapted to meas...  
WO/2011/135094A1
A voltage clamp circuit (7) is described for reflecting a voltage at an input node (N1). The voltage clamp circuit (7) comprises a circuit (9) for providing at least two currents (lmir, lref) at its output terminals (OUT1, OUT2). It furt...  
WO/2011/137261A1
Various disclosed aspects provide for protecting components (e.g., integrated circuits) from spurious electrical overvoltage events, such as electrostatic discharge. Embedded components with voltage switchable dielectric materials may pr...  
WO/2011/130905A1
A pulse current sensor and a lightning protection cabinet with surge wave recording composed of the sensor are provided. The pulse current sensor(17) includes a pair of semi-circular magnetic cores(22) which are installed oppositely, air...  
WO/2011/090827A3
An electrostatic discharge (ESD) protection clamp (21, 21', 70, 700) for protecting associated devices or circuits (24), comprises a bipolar transistors (21, 21', 70, 700) in which doping of facing base (75) and collector (86) regions is...  
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/2011/124605A2
A method for the operational control of an inverter (4) designed for DC/AC voltage conversion that has at least one direct-voltage input (2, 3) and that can be connected to a power supply grid via at least one alternating-voltage output ...  
WO/2011/124767A1
The object of the invention is a transformer circuit arrangement comprising a first protection unit (116) integrated to a secondary circuit (104) of a transformer (100) in serial connection to at least one capacitive element (112) to pro...  
WO/2011/116488A1
The invention relates to a method and apparatus for suppressing an inrush current of a three-phase transformer (15) connected to a three-phase power supply via a triple- pole circuit breaker (20), the transformer (15) being connected and...  
WO/2011/119723A2
An Ethernet surge protector can be mounted externally and/or internally to a wall of a building. The Ethernet surge protection device may include a housing, a threaded port, and a surge filter. The housing may define a space along an axi...  

Matches 901 - 950 out of 12,865