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WO/2009/104971A1 |
The present invention relates to a device for connecting and breaking DC power comprising an input DC power (DC-In) arranged to be connected to a circuit board (1) and to the collector port (C) of an insulated gate bipolar transistor (IG...
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WO/2009/094151A1 |
A method and apparatus for testing an AFCI device. In one embodiment, the method comprises the steps of providing an AFCI device to be tested and a load, wherein the AFCI device and the load form an electrical circuit, applying AC power ...
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WO/2009/090143A1 |
Electronic protection unit comprising a control unit and a main and auxiliary power supply stage to supply electrical power to said control unit. The auxiliary power supply stage comprises electronic means suitable to generate an auxilia...
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WO/2009/089994A1 |
In IEC technology, circuit breakers and residual current devices are used which have isolating contacts that interrupt the electric circuit in the event of excess current and a short-circuit current or a residual current. The aim of the ...
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WO/2009/089995A1 |
A residual current device (10) is equipped with an additionally functionality so that an electric circuit in which the residual current device is switched is also protected from arcs. The residual current device comprises appropriate mea...
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WO/2009/081258A1 |
A method of detecting arcing conditions includes sensing current and HF signals therefrom; bandpass filtering the HF signals and providing filtered signals; detecting peak signals and envelopes from the filtered signals; counting occurre...
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WO/2009/076769A1 |
A method and system for protecting an electrical power transmission network comprising the steps of: measuring a voltage and a current at a first location in the network other than at a generator in the network; determining positive and ...
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WO/2009/056084A1 |
The invention relates to a lifting magnet (11), comprising an emergency power source (121) effective during a mains power failure, said emergency power source having a plurality of high-performance capacitors (12), preferably double-laye...
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WO/2009/043766A1 |
The invention relates to a power switch having an electronic overcurrent protection trigger, which receives the power supply thereof from the power supply network monitored by the power switch, comprising a current sensor, a rectifier, a...
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WO/2009/027373A2 |
The application discloses methods how to arithmetically calculate a corrected effective value from a real effective value of a secondary current of an iron-cored current transformer when magnetization of the iron core reaches the saturat...
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WO/2008/049436A9 |
Device and method for detecting a loose electrical connection, particularly a loose connection in an electric installation. The device comprising a microprocessor (29); and at least one detection means being provided for detecting a high...
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WO/2009/019586A2 |
An arc fault circuit interrupter includes line and load terminals, separable contacts in series between the terminals, a neutral conductor, and an operating mechanism opening and closing the contacts and tripping open the contacts in res...
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WO/2009/019581A2 |
A circuit interrupter includes separable contacts, a neutral conductor, an operating mechanism structured to open and close the separable contacts, and a plurality of current sensors structured to sense at least current flowing through t...
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WO/2009/015664A2 |
The invention relates to a polarity-reversal tolerance circuit for matching the polarity of electrical voltages, in particular of electrical DC voltages, at least having four field-effect transistors (V1P, V2P, V1N, V2N), which are arran...
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WO/2009/008994A1 |
A combination expandable outlet and surge protector apparatus includes a plurality of outlet plugs which are separately moveable and are protected by a water impervious sheathing attached to each plug and at least one surge protector cir...
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WO/2008/155065A2 |
The invention relates to a device (1) for operating an electronic circuit on a high-voltage potential. Said device comprises a diode array (3) which is arranged in a high-voltage line (2) such that a current running through the high-volt...
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WO/2008/153578A1 |
The present invention comprises MEMS enabled apparatus for the detection of arc- faults and the elimination of arc-flash conditions. The apparatus comprises an arc- flash detection component and a current limiting component. The current ...
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WO/2008/148727A1 |
The invention concerns a voltage measurement device (34) for connection to a primary voltage dividing element provided between ground and an electrically conducting element in a system for controlling an electrical process as well as suc...
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WO/2008/148793A1 |
The invention concerns a method, device and computer program product for providing increased reliability in the processing of digital signals. The device includes means (20) for performing analog measurement of a received signal (S) inte...
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WO/2008/145694A1 |
The invention relates to a method for correcting a secondary current path (i2(t)) of a current converter (10) disturbed by saturation, wherein measurement values (i(n)) of the secondary current path (i2(t)) of the current converter (10) ...
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WO/2008/146040A1 |
A system for identifying a risk of fire in a mains segment. The system comprises at least two monitors for measuring at least one of current and voltage at points in the segment. Each monitor is provided with a transmitter for transmitti...
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WO/2008/138557A1 |
The invention relates to a power switch configured for the purposes of preventing accidental arcs in a low-voltage switchgear. The invention provides the power switch with an overcurrent evaluation means responding to an accidental arc p...
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WO/2008/132058A1 |
The invention relates to a drive unit (11) for a circuit breaker (10). The drive unit comprises a control unit (17) for controlling opening and closing operations of the circuit breaker. The drive unit is characterised in that it compris...
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WO/2008/113423A1 |
In order to detect and evaluate current changes as a result of electric arcs, a sensor signal (di/dt) that is differentiated by time (t) and has a sensor-dependent frequency bandwidth (fgo1 - fgu) is produced, the upper limit frequency (...
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WO/2008/104510A1 |
A surge arrester comprises a varistor arrangement, wherein the varistor arrangement has a plurality of varistor modules (3a, 3b, 3c, 3d, 12a, 12b, 12c, 12d). Between the varistor modules (3a, 3b, 3c, 3d, 12a, 12b, 12c, 12d) electrically ...
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WO/2008/104848A1 |
An arc fault circuit interrupter (2) includes separable contacts (4), a neutral conductor (27), an operating mechanism (6) structured to open and close the separable contacts, at least one current sensor (8,50,52) structured to sense cur...
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WO/2008/104849A1 |
An arc fault circuit interrupter includes separable contacts, an operating mechanism, a current sensor sensing current flowing through the contacts and outputting a sensed current, and a processor determining and storing peak values of t...
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WO/2008/106136A1 |
A method and apparatus for mitigating dynamic overvoltage (DOV) in an AC network. A distribution and power transformer has its primary connected to the high voltage bus of the network and its secondary connected to a switching device. Up...
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WO/2008/103342A1 |
The present invention is directed to a protective relay for providing protective control to a power system carrying three-phase power. The protective relay performs a faulted phase detection method wherein signal values representative of...
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WO/2008/087275A2 |
The invention relates to an electrically insulated current measuring device comprising a signal inlet connected to an electrical shunt (40), an output signal outlet (SO), and electrically insulated signal transfer means receiving the inp...
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WO/2008/069870A1 |
A voltage suppression device for suppressing voltage surges in an electrical circuit, comprised of a voltage sensitive element having a predetermined voltage rating, the voltage sensitive element increasing in temperature as voltage appl...
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WO/2008/069988A2 |
A method and apparatus to improve the security and dependability of high impedance fault (HIF) detection by removing prior to the detection devices one or more of a predetermined number of harmonics of the power line frequency. In one em...
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WO/2008/069979A1 |
A fault detection system is disclosed that connects to an electrical power line and detects high impedance faults. The system includes high impedance fault detection system or systems that are operable to detect a high impedance fault fr...
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WO/2008/054806A2 |
In accordance with one aspect the present disclosure is directed toward a method for detecting arc faults on a power line. The method may include monitoring power signals associated with a power line and filtering the power signals to pr...
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WO/2008/040988A1 |
A coupler that aids in the detection of partial discharge events in a vessel. The coupler comprises a housing for a detector which extends through a wall of the vessel. The housing is sealably connectable to a vessel and is at least part...
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WO/2008/034400A1 |
The invention relates to a method for producing a fault signal (F), which indicates a fault in the secondary circuit (for example 32a, 35a) of a current transformer (for example 31a, 34a), which interacts with a local differential protec...
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WO/2008/024966A1 |
A system for exposing a target material to small particles. The system includes an exposure chamber that receives the target material. A stream of charged particles is directed via an inlet into the exposure chamber toward the target mat...
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WO/2008/013614A2 |
Certain exemplary embodiments comprise a method, which can comprise automatically generating an output signal responsive to an input signal. The input signal can be indicative of an arc fault. The output signal can be configured to cause...
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WO/2007/136362A2 |
An electronic apparatus externally detects open protector contacts inside of a compressor. The compressor includes a compressor motor having a run winding and a start winding. The compressor motor also includes internal protector contact...
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WO/2007/135162A1 |
This invention relates to a method of detecting faults on an electrical power line (7) and a sensor (5) for use in such a method. Preferably, the sensor is a line-mounted sensor (5). The method comprises the initial step of determining a...
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WO/2007/128421A1 |
The invention relates to a manually operated circuit breaker for motor protection and/or line protection. Such circuit breakers can be extended in modular fashion by replaceable additional modules being plugged on. The essence of the inv...
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WO/2007/129213A1 |
A circuit breaker includes a first lug and second and third acoustic lugs electrically connected to a power circuit. Separable contacts are electrically connected in series between the first lug and the second acoustic lug. An operating ...
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WO/2007/130185A1 |
Certain exemplary embodiments can comprise an arc fault detection circuit. The arc fault detection circuit can comprise a zero crossing analysis sub-system comprising a counter configured to determine, for a first waveform, a count of di...
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WO/2007/125410A2 |
An arc fault circuit breaker includes a housing, separable contacts mounted within the housing, an operating mechanism structured to open the separable contacts when actuated, and a trip assembly including an arc fault trip mechanism str...
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WO/2007/122228A1 |
The invention relates to an electric protection device for a switchgear and includes an arc eliminator (1 ) and a surge arrester (2) connected in parallel with the arc eliminator (1 ). The invention also relates to a switchgear or a dist...
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WO/2007/122296A1 |
The invention relates to a system for controlling a power (6), water (18) or gas (17) supply in emergency and energy saving situations. The system comprises one or more detectors (2, 8, 14, 15, 16) for indicating various service conditio...
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WO/2007/124165A2 |
A system is provided for enabling the communication between a handheld device 26 and a circuit breaker (18a, 18b, 18c). The system comprises an electronic circuit breaker (18a, 18b, 18c) including an RFID component (54) having an RFID mo...
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WO/2007/123835A2 |
Certain exemplary embodiments comprise a method, which can comprise configuring a system to compare an electrical value and a selected pre-stored threshold value of a plurality of pre-stored threshold values. The method can comprise conf...
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WO/2007/116221A1 |
This invention relates to a residual current device which is able to safely and reliably operate when a line voltage is present (voltage dependent mode) and when the line voltage is not present or falls below a predetermined threshold le...
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WO/2007/118047A2 |
Static neutralization of a charged object is provided by applying an alternating voltage having a complex waveform, hereinafter referred to as a "multi-frequency voltage", to an ionizing electrode in an ionizing cell. When the multi-freq...
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