Entries |
Document | Title | Date |
20080211484 | FLEXIBLE CURRENT TRANSFORMER ASSEMBLY - A current transformer assembly includes at least one Rogowski coil having a first closeable loop with an electrically conductive coil member and a first pair of terminals. An integrator unit has respectively a cable connected across the first pair of terminals of a respective Rogowski coil. Each respective Rogowski coil provides an output voltage received by the integrator assembly caused by when a respective electrical conductor on a phase of a multiphase circuit is arranged within an opening of the closeable first loop of the respective Rogowski coil, and provides an output signal proportional to a current in a conductor arranged in an opening of a Rogowski coil. At least one of the Rogowski coils includes an inline calibration unit for fast calibration and recalibration when retrofitting a monitor module that monitors a value of the current in one or more conductors. | 09-04-2008 |
20080231257 | Method and apparatus for measuring the voltage of a power source - Various concepts and techniques are disclosed for measuring the voltage of a power source. An apparatus includes a voltage metering circuit and a transformer having a first winding coupled to the voltage metering circuit and a second winding for coupling to a power source. | 09-25-2008 |
20080303512 | Isolating Transformer - Electrical power supply for electronic circuits arranged in a high voltage environment, which supply includes an isolating device interconnecting the low voltage side (secondary side) and the high voltage side (primary side) and including a primary side magnetic circuit ( | 12-11-2008 |
20080315864 | Out-Of-Line Measurement of a Current Flowing Through a Load - A load measuring circuit including a cable including first and second conductors and a shielding. The conductors are connected by a first end thereof to a load, the shielding is not connected to a ground at the end, and the conductors are connected to a generator by the second end thereof. A transformer includes a first winding connected to a conductor on the second end of the cable, a second winding is connected between a ground and the shielding on the second end of the cable, and a third winding is connected to a current measuring member. | 12-25-2008 |
20090039870 | ELECTRICAL MEASURING INSTRUMENT HAVING DETACHABLE CURRENT CLAMP - A current clamp meter having a current meter body and a detachable current clamp. The current meter body and the current clamp are configured so that the current clamp is detachable from the current meter body and the meter is operable with the current clamp either attached to the current meter body or detached from the current meter body. | 02-12-2009 |
20090058399 | CLAMP JAW ASSEMBLY - A method of manufacturing a clamp jaw assembly for a clamp meter is provided. The method includes providing a clamp jaw core and a shield having a channel. The method further includes positioning the clamp jaw core within the channel of the shield such that the shield surrounds a portion of the clamp jaw core. The method also includes enclosing the clamp jaw core and the shield within a clamp jaw housing. | 03-05-2009 |
20090072813 | Intelligent Electronic Device Having Circuitry for Reducing the Burden on Current Transformers - An intelligent electronic device (IED), e.g., an electrical power meter, having circuitry for reducing the burden placed on at least one current sensor of the device resulting in a highly accurate measurement by the at least one current sensor is provided. The circuitry of the present disclosure reduces the burden on the current sensor while providing amplification, e.g., gain control, to the input signal. The circuitry includes at least one current sensor outputting a signal to an operational amplifier (op amp) having a controlled variable feedback resistance. By employing an operational amplifier in the circuitry, the output of the current sensor will be at a near zero volts condition at all times thus reducing the burden on the current sensor. | 03-19-2009 |
20090115403 | Split core status indicator - The size of a status indicator for monitoring a current in a power cable is reduced by integrating a bobbin for the secondary winding with a current transformer core and integrating a circuit board including output terminals with a current transformer assembly. | 05-07-2009 |
20090219009 | Current Measurement Device - A current measurement device is disclosed that is configured to measure electrical current, both AC and DC, in a primary conductor that is electrically insulated from the current measuring device. Unlike known current measuring devices, the current measuring device in accordance with the present invention does not utilize a Hall effect device and is more accurate and less expensive than current measuring devices employing such Hall effect devices. The current measuring device in accordance with the present invention includes a transformer with a saturable magnetic core formed with a central aperture and a current measuring circuit. In one embodiment of the invention, the transformer is provided with a secondary winding and no primary winding. The electrical conductor, i.e. primary conductor, in which electrical current is to be measured is disposed in the central aperture of the magnetic core and thus acts as a primary winding having a single turn. The current measuring device includes a current source that is connected to the secondary winding of the transformer in a direction opposite the flow of electrical current in the primary conductor. The current source is driven by a voltage ramp generator. When the magnetic flux in the transformer core generated by way of the secondary winding is equal and opposite the magnetic flux generated as a result of the electrical current flowing in the primary conductor, the voltage of the voltage ramp generator at that point provides a signal representative of the DC or AC electrical current flowing in the primary conductor. | 09-03-2009 |
20090289618 | ZERO-PHASE CURRENT DETECTING APPARATUS - In a zero-phase current detecting apparatus, a feedback loop is made up of a pulse generating unit, a current detecting unit, a peak detecting unit, an adding unit, and a current regulating unit. The adding unit outputs a difference between a target value and a peak value detected by the peak detecting unit. A zero-phase current is detected based on the difference output from the adding unit as a result of regulation of the peak value so as to be the target value in the adding unit. | 11-26-2009 |
20100007336 | System for Accurately Detecting Electricity Theft - There is disclosed a method of monitoring an electrical network of the type having a feeder line connected to a plurality of distribution transformers, each distribution transformer being in turn coupled to a load which may be provided with a customer meter. The method includes the steps of recording an accumulated in-phase current at each of the distribution transformers over a time period and recording for the same time period an accumulated in-phase current at the feeder line. The sum of the accumulated in-phase currents recorded at the distribution transformers are then compared to the accumulated in-phase current recorded at the feeder line. The method may also include the steps of recording accumulated in-phase currents at the customer meters and comparing their sum with the accumulated in-phase current measured at the distribution transformers coupled to the customer meters. The method may further include a method of automatically detecting the configuration of the network to determine on which phase the customer meters are connected to, and to which distribution transformer said customer meters are connected to, and further, where on the network, relative to a plurality of feeder meters, each of the distribution transformers are connected. | 01-14-2010 |
20100013460 | Rogowski Sensor and Method for Measuring a Current - A Rogowski sensor is provided for measuring a current of an electrical conductor. The sensor has a Rogowski coil, which has an electrical winding resistor, and an integration device which is connected to the Rogowski coil and is intended to generate an output signal which is proportional to the electrical current to be measured by the Rogowski sensor. The integration device is formed by the winding resistor of the Rogowski coil and a capacitance which is connected to the two winding connections of the Rogowski coil, and for the output signal from the integration device to be formed by the voltage applied to the capacitance. | 01-21-2010 |
20100033165 | MEASURING INDUCED CURRENTS ON A CAN BUS - A device for measuring currents induced in a CAN bus harness. In some embodiments, the device includes a first termination node, a second termination node, a current separator, a detection circuit, and a power source circuit. The current separator circuit has an RF transformer connected to the first termination node and separates a common mode RF current and a differential mode RF current of an RF current signal. The detection circuit is connected to the current separator circuit and receives at least one of the common mode RF current and the differential mode RF current from the separator circuit. The detection circuit also converts the common mode RF current and differential mode RF current to an non-RF output signal. The power source circuit provides power to the detection circuit. | 02-11-2010 |
20100045263 | CURRENT MEASUREMENT DEVICE WITH ELECTRICAL ISOLATION, ELECTRONIC TRIP UNIT, AND CIRCUIT BREAKER COMPRISING ONE SUCH DEVICE - The current measurement device with electrical isolation comprises an input signal connected to an electrical shunt, an output of an output signal, and signal transfer means with electrical isolation receiving the input signal and supplying said output signal. The transfer means comprise at least one signal transformer having at least one primary winding to receive a primary signal representative of said input signal, switching means to switch the input signal and supply the latter to said primary winding, and electrically isolated control means of the switching means comprising a control input receiving control signals during switching periods. A trip unit and an electrical circuit breaker comprises one such current measurement device and a processing unit processing electrical protection functions. | 02-25-2010 |
20100060261 | MEASUREMENT SIGNAL COUPLING DEVICE WITH ELECTRICAL ISOLATION AND ELECTRICAL EQUIPMENT UNIT COMPRISING ONE SUCH DEVICE - The coupling device with electrical isolation comprises at least one input signal, an output of an output signal representative of said input signal, and signal transfer means with electrical isolation receiving the input signal and supplying said output signal. The transfer means comprise at least one signal transformer having at least one primary winding to receive a primary signal representative of said input signal, switching means to switch the input signal and supply the latter to said primary winding, and electrically isolated control means of the switching means comprising a control input receiving control signals during switching periods. The electrical switchgear unit comprises one such coupling device connected to measuring resistors and to a processing unit processing electrical protection functions. | 03-11-2010 |
20100085036 | Overhead Communicating Device - A power line monitoring device is mounted to a power line. The device includes circuitry for monitoring the power line and communicating information regarding the power line. A ground reference point of the circuitry is electrically coupled to the power line. Therefore, the monitoring device, including its circuitry, has substantially the same voltage potential as the power line. Accordingly, there is a substantially equalized or uniform electric field around the device. The substantially equal voltage potential and electric field allow communications with the monitoring device to have reduced noise and interference, as compared to other devices that have different voltage potentials than their corresponding power lines. A pad of semi-conductive material may be disposed between the power line and the electrical conductors to slow a rate of change of the voltage potential of the device circuitry when mounting the device to the power line, thereby minimizing risk of corona discharge. | 04-08-2010 |
20100123454 | REVOLVABLE CLAMP METER - The clamp meter contains a revolving member configured between the meter's body member and jaw member. The revolving member is composed of a first base and a second base located on the interfacing sides of the body member and the jaw member, respectively. The first base and the second base are revolvably joined together by an axle extended axially from the body member into the jaw member via the first and second bases' aligned axle holes. The first base has at least a roller ball elastically embedded in a concave and exposed towards the second base. The roller ball would roll into one of a number of notches of the second base as the base and jaw members are rotated relative to each other, thereby creating a number of preset configurations of the included angle between the body and jaw members. | 05-20-2010 |
20100156393 | CURRENT SENSOR HAVING COIL MOUNTED TO CURRENT CARRYING BUS AND RELATED SYSTEM - A current sensor includes a coil for sensing current in a current carrying bus, and a mount for mounting the coil to the current carrying bus at a distance from the bus. A system including the current sensor includes similar structure. | 06-24-2010 |
20100207603 | AMMETER WITH IMPROVED CURRENT SENSING - An ammeter is provided with a plurality of individual wound coils interconnected in a generally U-shaped array to measure the magnitude of current in a conductor extending through a sensing region inside the U-shape. Additional pairs of position-sensing coils determine the position of the conductor relative to the sensing region and provide outputs to circuitry which permits the magnitude measurement to be displayed only if the conductor extends through the sensing region. | 08-19-2010 |
20100253322 | Non-intrusive electric alternating current sensor - A method and a current sensor for measuring current in a conductor are provided. The current sensor has a flexible coil having a first end and a second end and a mounting ring. The flexible coil is wrapped within the mounting ring to form a closed loop. The mounting ring has a first hole and a second hole drilled tangentially to an inner diameter of the mounting ring. The first end of the flexible coil extends through the first hole of the mounting ring and the second end of the flexible coil extends through the second hole of the mounting ring. The mounting ring has a channel therethrough that provides an access point so that the mounting ring can be easily flexed open or closed. | 10-07-2010 |
20100259247 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTOR, CURRENT DETECTOR AND VOLTAGE DETECTOR - A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction. | 10-14-2010 |
20100264906 | Apparatus and Methods Thereof for Power Consumption Measurement at Circuit Breaker Points - Apparatus and methods are provided for the measurement of power consumption at points of interest, such as circuit breakers, machines, and the like. Accordingly, means are provided for measurement of power consumption for each electrical sub-network that is controlled by a circuit breaker. Each apparatus is enabled to communicate its respective data, in an environment of a plurality of such apparatuses, to a management unit which is enabled to provide finer granularity power consumption profiles. Challenges of measuring relatively low supply currents, wireless operation in an environment of a large number of apparatuses, and self-powering are addressed. | 10-21-2010 |
20100271007 | DIAGNOSING DEVICE OF SIGNAL STATUS IN MEASUREMENT AND CONTROL BY MEASURING MEANS AND CONTROL MEANS - This aims to provide a diagnosing device for detecting the measurements of an electric current, a voltage and a resistance by a temperature/moisture or pressure sensor or a signal state in control means, precisely with a simple circuit constitution, for diagnosing the soundness of a circuit while simplifying a power source circuit, to suppress the cost more than the conventional circuit having no diagnosing function, and for diagnosing the signal status in the measurement or control by a measuring means or a control means. An alternating voltage generating means containing a pulse-wave voltage and an alternating current is connected with the primary side of a transformer, and a driven member such as the measuring means for any of varying electric current, voltage and resistance is connected with the secondary side. The change in the primary-side current, which is caused with the electric power fed through an insulating transformer by the action of the driven member connected with the secondary side, is measured so that the signal status in the measuring or control means is diagnosed according to the measurement result. | 10-28-2010 |
20100295540 | BRANCH POWER MONITORING SYSTEM - A power monitoring system that reduces the need for external power calculation devices while simplifying the configuration of power meters. | 11-25-2010 |
20100308797 | POWER SENSOR - A power sensor is disclosed for a current carrying conductor. In at least one embodiment, the sensor includes at least one ferromagnetic core, a secondary winding, and at least one of connecting elements for a load or a load. The secondary winding is designed as an injection molded part on an insulating layer that is injection molded onto the ferromagnetic core. | 12-09-2010 |
20100321003 | METER-MOUNTED EXTENDER - A method of designing a meter-mounted extender with a transformer is disclosed, wherein losses from primary and secondary windings are equalized for a given secondary load. | 12-23-2010 |
20100327852 | TEST APPARATUS - The present invention relates to a test apparatus for a broadband telecommunication network. The apparatus comprises an electrical DC power source having a first and a second electrical connection. The test apparatus further comprises a first electrical circuit comprising a first and a second electrical circuit input and a first and a second electrical circuit output. The first and second electrical circuit input are electrically connected to the first and the second electrical connection of the electrical DC power source respectively. Additionally electrical connection is established from the first electrical circuit input to the first electrical circuit output via a first inductor having a first inductance and electrical connection is established from the second electrical circuit input to the second electrical circuit output via a second inductor having a second inductance. A first impedance is transformer coupled to the first inductor. A first test apparatus outlet is electrically connected to the first electrical circuit outlet and a second test apparatus outlet is electrically connected to the second electrical circuit outlet. The first test apparatus outlet and the second test apparatus outlet are adapted for establishing electrical contact to a device to be tested. | 12-30-2010 |
20110006755 | HIGH SENSITIVITY DIFFERENTIAL CURRENT TRANSFORMER FOR INSULATION HEALTH MONITORING - A current transformer is provided. The current transformer comprises an inner magnetic core having a central opening, an outer sense core circumscribing the inner magnetic core, at least one pair of conductors extending through the central opening and positioned symmetrically with respect to a center point of the inner magnetic core, and one or more coils disposed on the inner magnetic core, the outer sense core, or both, in a magnetically balanced configuration relative to a magnetic neutral axis of the inner magnetic core. | 01-13-2011 |
20110012589 | CLAMP-ON MULTIMETERS INCLUDING A ROGOWSKI COIL FOR MEASURING ALTERNATING CURRENT IN A CONDUCTOR - A clamp-on multimeter measures alternating current flow in an electrical conductor. The multimeter includes a display, a housing including the display, a first sensor, a second sensor, a processor and an integrator. The first sensor has a magnetizable material core and inductively senses the alternating current. The first sensor includes a first clamp portion fixed to the housing and a second clamp portion pivotally coupled to the first clamp portion. The second sensor includes a Rogowski coil that has a non-magnetic core and inductively senses the alternating current. The processor receives an input signal in a first voltage range and sends an output signal to the digital display. The integrator scales a signal from the second sensor in a second voltage range to the first voltage range. The housing includes the processor, the integrator, and a selector configured to select the input signal to the processor from one of the first sensor and the integrator. | 01-20-2011 |
20110025303 | Phasor Estimation During Current Transformer Saturation - A method, device and computer program product for determining at least one property of a current (I | 02-03-2011 |
20110068773 | MANIPULATION ASSEMBLY FOR ONLINE ELECTRICAL SYSTEM TEST PROBE INSTALLATION - An apparatus for online partial discharge testing includes a split-core radio-frequency current transformer sensor, an actuation subassembly, and a biasing member. The current transformer sensor has a first portion, a second portion, and a sensor hinge operably engaged between the first portion and the second portion. The actuation subassembly includes an elongate first member secured to the first portion of the current transformer sensor, a second member secured to the second portion of the current transformer sensor and configured to be movable relative to the first member, and a third member engaged with the second member and configured to be movable relative to the first member. The biasing member is configured to pivotally bias the first portion and the second portion of the current transformer sensor toward each other relative to the sensor hinge, with the biasing member secured relative to the first member. | 03-24-2011 |
20110074397 | MONITORING SYSTEM AND CURRENT TRANSFORMERS FOR PARTIAL DISCHARGE DETECTION - A high frequency current transformer (HFCT) sensor for detecting partial discharges produced by a component is disclosed. The HFCT sensor includes at least one electrically conductive pattern formed on a substrate, where the substrate comprises multiple segmented regions connected by intermediate regions for folding along multiple fold lines between the segmented regions to form the HFCT sensor. A system for monitoring at least one component of an aircraft wiring system is also disclosed. The monitoring system includes at least one of the HFCT sensors for detecting partial discharges produced by the aircraft wiring system component. The monitoring system further includes a data acquisition system configured to monitoring signals from the HFCT sensor(s). | 03-31-2011 |
20110089933 | COMBINED ELECTRICAL MEASUREMENT DEVICE - A combined measurement device for measuring current and/or voltage of an electrical conductor, comprising a supporting body, a current sensor housed inside the supporting body, and a voltage sensor located at least partially inside the supporting body. A shielding is positioned around the current sensor. The current sensor and the voltage sensor are mutually arranged so as the shielding shields at least partially both the current sensor and the voltage sensor against external electric field disturbances. | 04-21-2011 |
20110101960 | CLAMP JAW ASSEMBLY - A clamp jaw assembly for a clamp meter is provided. The clamp jaw assembly comprises a housing containing a clamp jaw core disposed within a shield. The housing, shield, and core of the clamp jaw assembly are configured to provide an extended creepage and clearance path from an exterior of the housing to a surface of the core. | 05-05-2011 |
20110156697 | COMPACT, TWO STAGE, ZERO FLUX ELECTRONICALLY COMPENSATED CURRENT OR VOLTAGE TRANSDUCER EMPLOYING DUAL MAGNETIC CORES HAVING SUBSTANTIALLY DISSIMILAR MAGNETIC CHARACTERISTICS - A device for sensing electrical current or voltage in an electrical distribution system using an actively compensated current ratio transformer that includes a first magnetic core having a first permeability and a second magnetic core having a second permeability higher than the first permeability. A primary winding having P turns is coupled with the first and second magnetic cores, a measurement winding having M turns is coupled with the first and second magnetic cores so that current in the primary winding induces current in the measurement winding, and a sense winding having S turns is coupled with the second magnetic core. An amplifier coupled to the sense winding receives a voltage developed across the sense winding and produces a compensation current in response to the received voltage. The amplifier has an output coupled to the sense winding to feed the compensation current through the sense winding to reduce the voltage developed across the sense winding voltage to substantially zero. A burden resistor is coupled to the measurement winding and the sense winding for receiving the sum of the current induced in the measurement winding and the compensation current. | 06-30-2011 |
20110156698 | PHASE CANCELING CURRENT TRANSDUCER - A phase canceling current transducer for a power meter includes an error correction unit including a memory for storing error correction factors. A data processing device of the error correction unit adjusts the output of the transducer to correct for phase and ratio errors produced by the transducer current transformer or to cause the transducer's output to mimic the output of another current transducer. | 06-30-2011 |
20110163738 | CURRENT DETECTION CIRCUIT AND TRANSFORMER CURRENT MEASURING SYSTEM - A current detection circuit and a transformer current measurement system are offered, in which when elements and circuit, which cannot operate originally unless a transformer with small excitation inductance is used, are connected to a primary side of the transformer, even if the transformer, whose excitation inductance is large, is used, transformer current (primary current and secondary current) can be measured without deteriorating operations of the elements and circuit. | 07-07-2011 |
20110204879 | CONSTRUCTION SYSTEM FOR AN ELECTRICAL CURRENT AND/OR VOLTAGE SENSOR - A construction system for a current and/or voltage sensor ( | 08-25-2011 |
20110241654 | METHOD AND APPARATUS FOR DYNAMIC SIGNAL SWITCHING OF A MERGING UNIT IN AN ELECTRICAL POWER SYSTEM - A method and an apparatus for dynamic signal switching with multiple measurement sources, for a merging unit in an electrical power system, said merging unit receiving at least two input signals from at least one current transformer measuring the same physical primary quantity. The method comprises a step of outputting from said merging unit, in a real-time mode, a digitized output stream of sampled values with the truest representation of the physical primary quantity, based on the actual values of the input signals. | 10-06-2011 |
20110260711 | Method and device for determining a direct current and resistance welding device - The invention relates to a method and a device for determining a direct current (i(t)) flowing in a conductor ( | 10-27-2011 |
20120019233 | CURRENT SENSOR CONSISTING OF A CABLE FOR ATTACHMENT IN THE FORM OF A LOOP - The sensor comprises a cable ( | 01-26-2012 |
20120062211 | COMPACT ELECTRICAL POWER METER - An electrical power meter for monitoring electrical power supplied to a load comprises a meter case, a plurality of current transformers within the meter case for sensing the electrical current in a plurality of line conductors of a power distribution system, and a plurality of pairs of terminals on the meter case for connecting the meter to the line conductors. The terminals of each pair are located on opposite sides of one of the current transformers, and a current transformer bus bar connects the two terminals and extends through one of the current transformers. A plurality of guides adjacent selected pairs of the terminals position lugs connecting line conductors to the selected pairs of terminals. | 03-15-2012 |
20120086435 | MANIPULATION ASSEMBLY FOR ONLINE ELECTRICAL SYSTEM TEST PROBE INSTALLATION - An apparatus for online partial discharge testing includes a split-core radio-frequency current transformer sensor, an actuation subassembly, and a biasing member. The current transformer sensor has a first portion, a second portion, and a sensor hinge operably engaged between the first portion and the second portion. The actuation subassembly includes an elongate first member secured to the first portion of the current transformer sensor, a second member secured to the second portion of the current transformer sensor and configured to be movable relative to the first member, and a third member engaged with the second member and configured to translate along a length of the first member. The biasing member is configured to pivotally bias the first portion and the second portion of the current transformer sensor toward each other relative to the sensor hinge, with the biasing member secured relative to the first member. | 04-12-2012 |
20120105052 | METHOD FOR MEASURING THE CURRENT LEVEL OF AN ALTERNATING CURRENT - A method for measuring a current level of an alternating current uses a current transformer having a measurement winding and a test winding. The resistance of the test winding is measured, the temperature of the test winding and therefore of the measurement winding is determined therefrom, and a value for a current level measured on the measurement winding is corrected using that temperature. | 05-03-2012 |
20120139527 | MIXED MODE FLUXGATE CURRENT TRANSDUCER - Electrical current transducer comprising a measuring circuit ( | 06-07-2012 |
20120212213 | NON-INVASIVE ENERGY CONSUMPTION MONITORING - Devices, methods, and systems for non-invasive energy consumption monitoring are described herein. One or more device embodiments include a transformer configured to couple the device to a circuit conductor that is coupled to an additional device, a detection module configured to detect a change in a power signal over the circuit conductor, and a transmission module configured to transmit a unique signal associated with the additional device over the circuit conductor if the change in the power signal meets or exceeds a particular threshold. | 08-23-2012 |
20120268106 | SMART CURRENT TRANSFORMERS - According to one aspect, embodiments of the invention provide a current monitoring device comprising a current transformer configured to be removeably coupled to a power line and to generate a reference signal having a level related to a current level of the power line, a sensor circuit connected to the current transformer and configured to be removeably coupled to a communications bus and to convert the reference signal to a digital reference signal and provide a signal indicative of the current level to the communication bus, and a housing containing the sensor circuit and the current transformer. | 10-25-2012 |
20130002236 | DEVICE FOR MEASURING THE ELECTRIC CURRENT FLOWING IN AN ELECTRIC APPARATUS, SAID DEVICE ENABLING POWER MEASUREMENT, AND AN ELECTRIC APPARATUS COMPRISING SAME - A device for measuring an electric quantity such as electric current flowing in an electric equipment unit, which device is in a case fitted on a mounting support, and having pass-through holes and terminals separated by insulating material, their number corresponding to the number of phases of the equipment unit, the holesto permit a conductor to pass therethrough, to be electrically connected to strips of terminals of the equipment unit the opposite end to electric contact strips of a load-side or line-side apparatus from the equipment unit and, for at least one terminal of the device, a magnetic core at least partially surrounding such terminal with an air-gap around which a secondary measuring coil is wound between two end portions of the magnetic core which define the air-gap, the coil(s) delivering a signal representative of the current flowing in the apparatus. | 01-03-2013 |
20130027024 | CURRENT SENSOR ARRANGEMENT - A current sensor comprising a primary conductor for conducting a current that is to be measured, at least two magnetic field probes for measuring magnetic fields, and a magnetic core, which has a closed ring structure having three or more corners that encloses the primary conductor, wherein each magnetic field probe is arranged on the magnetic core or in recesses in the magnetic core. | 01-31-2013 |
20130076342 | ELECTRICAL METERING AND SWITCHING EQUIPMENT - An electrical service equipment provides electrical service to a building or other similar venue. The equipment includes a cabinet with two portions structured to hold a meter pan and a switch, respectively. The switch is preferably an HCP switch. The portion holding the meter pan includes a subassembly including two horizontal plates and a plurality of buses passing through the plate and adapted to provide connection to the current and voltage transformers of the meter pan. | 03-28-2013 |
20130082690 | MEASURING ARRANGEMENT FOR DETECTING ALTERNATING CURRENTS - The invention relates to a measurement arrangement for connection to an energy and power meter and for connection to a Rogowski coil for detecting of alternating currents of a conductor being metered. The measurement arrangement has an integrator circuit to create a voltage signal proportional to the detected alternating current and a voltage/current converter to create an output current that is proportional to the voltage signal created by the integrator circuit. Furthermore, the invention relates to a measurement system that has an above-described measurement arrangement and a Rogowski coil for detecting of alternating currents of a conductor being metered. | 04-04-2013 |
20130141079 | SUBSTRATE AND METHOD FOR MANUFACTURING THE SAME, AND PROBE CARD - Disclosed herein are a substrate and a method for manfuacturing the same, and a probe card employing the substrate as a space transformer, the substrate including: a substrate body; a key forming groove formed in one surface of the substrate body; and an alignment key formed on the key forming groove. | 06-06-2013 |
20130154616 | Rogowski Coil Assembly - A Rogowski coil assembly ( | 06-20-2013 |
20130162242 | DC & AC CURRENT DETECTION CIRCUIT - A circuit for detecting a DC current in a conductor (L | 06-27-2013 |
20130187636 | Energy Harvest Split Core Design Elements for Ease of Installation, High Performance, and Long Term Reliability - A power distribution monitoring system is provided that can include a number of features. The system can include a plurality of power line sensing devices configured to attach to individual conductors on a power grid distribution network. In some embodiments, the power line sensors can include a split-core transformer. In some embodiments, a power line sensing device is disposed on each conductor of a three-phase network. The sensing devices can be configured to measure and monitor, among other things, current and electric-field on the conductors. Methods of installing, sealing, and protecting the split-core transformers of the power line sensors are also discussed. | 07-25-2013 |
20130187637 | Distribution Line Clamp Force Using DC Bias on Coil - A power distribution monitoring system is provided that can include a number of features. The system can include a plurality of monitoring devices configured to attach to individual conductors on a power grid distribution network. In some embodiments, a monitoring device is disposed on each conductor of a three-phase network and utilizes a split-core transformer to harvest energy from the conductors. The monitoring devices can be configured to harvest energy from the AC power grid and apply a DC bias to core halves of the split-core transformer to maintain a positive magnetic force between the core halves. Methods of installing and using the monitoring devices are also provided. | 07-25-2013 |
20130229171 | COMPACT, TWO STAGE, ZERO FLUX ELECTRONICALLY COMPENSATED CURRENT OR VOLTAGE TRANSDUCER EMPLOYING DUAL MAGNETIC CORES HAVING SUBSTANTIALLY DISSIMILAR MAGNETIC CHARACTERISTICS - A device for sensing electrical current or voltage in an electrical distribution system using an actively compensated current ratio transformer that includes a first magnetic core having a first permeability and a second magnetic core having a second permeability higher than the first permeability. A primary winding having P turns is coupled with the first and second magnetic cores, a measurement winding having M turns is coupled with the first and second magnetic cores so that current in the primary winding induces current in the measurement winding, and a sense winding having S turns is coupled with the second magnetic core. An amplifier coupled to the sense winding receives a voltage developed across the sense winding and produces a compensation current in response to the received voltage. The amplifier has an output coupled to the sense winding to feed the compensation current through the sense winding to reduce the voltage developed across the sense winding voltage to substantially zero. A burden resistor is coupled to the measurement winding and the sense winding for receiving the sum of the current induced in the measurement winding and the compensation current. | 09-05-2013 |
20130257412 | LOW-COST ROGOWSKI COIL SENSORS - In various embodiments, a low-cost Rogowski coil sensor including a coil wound around a flexible carrier is provided with a reliable parallel-entry closure mechanism. | 10-03-2013 |
20130278243 | CURRENT MONITOR AND ELECTRIC POWER QUALITY COMPENSATION SYSTEM - It's disclosed a current monitor and an electric power quality compensation system. The current monitor includes: an internal monitor module configured to output a measurement of current for characterizing a real-time electric power quality of an external power network based on a received detection current, wherein an external detection module is used to detect a current of the external power network and output a first level detection current; and an isolation and transfer module including an input side and an output side electrically isolated from each other, wherein the input side is configured to be connected with the external detection module, and the output side is configured to be connected with the internal monitor module, the isolation and transfer module receives the first level detection current and outputs a second level detection current to the internal monitor module. | 10-24-2013 |
20130285644 | CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTOR, CURRENT DETECTOR AND VOLTAGE DETECTOR - A current and voltage detection printed board includes a board formed with a penetration hole; a first pattern wire formed at a periphery of the penetration hole; a second pattern wire formed at the periphery of the penetration hole; a plurality of first through holes that penetrate the board between the first and second pattern wires; a third pattern wire formed at the periphery of the penetration hole; a fourth pattern wire formed at the periphery of the penetration hole; and a plurality of second through holes that penetrate the board between the third and fourth pattern wires. | 10-31-2013 |
20130285645 | Apparatus and Methods Thereof for Power Consumption Measurement at Circuit Breaker Points - Apparatus and methods are provided for the measurement of power consumption at points of interest, such as circuit breakers, machines, and the like. Accordingly, means are provided for measurement of power consumption for each electrical sub-network that is controlled by a circuit breaker. Each apparatus is enabled to communicate its respective data, in an environment of a plurality of such apparatuses, to a management unit which is enabled to provide finer granularity power consumption profiles. Challenges of measuring relatively low supply currents, wireless operation in an environment of a large number of apparatuses, and self-powering are addressed. | 10-31-2013 |
20130320961 | CURRENT SENSING DEVICES AND METHODS - A low-cost and high-precision current sensing device and methods for use and manufacturing. In one embodiment, the current sensing apparatus comprises a Rogowski-type coil which is manufactured in segments so as to facilitate the manufacturing process. In an exemplary embodiment, the current sensing apparatus segments are asymmetric in shape and/or composition (e.g., bobbin shape, size, and/or winding configuration) so as to account for asymmetries in the magnetic field distribution around a bus bar, or to accommodate its shape in a more compact form factor, and/or to improve the immunity to the effects of an external magnetic field. Methods of manufacturing and using the aforementioned current sensing apparatus are also disclosed. | 12-05-2013 |
20130328548 | Method And Device For AC/DC Sensitive Current Measurement - The invention relates to a method and a device ( | 12-12-2013 |
20130335061 | Systems and Methods for Monitoring Underground Power Lines - A system for monitoring power in accordance with the present disclosure has a transformer monitoring device that interfaces with two electrical conductors electrically connected to a transformer at a location on a power grid and to measure a first current and a second current through the first electrical conductor and the second electrical conductor, respectively. Further, the transformer monitoring device measures a first voltage and a second voltage associated with the first electrical conductor and the second electrical conductor, respectively, and the transformer monitoring device comprises two separate and distinct current measuring devices integral therewith. Additionally, the system comprises logic that calculates values indicative of power corresponding to the transformer based upon the first current and the first voltage and the second current and the second voltage. | 12-19-2013 |
20140015516 | AN AC CURRENT OR VOLTAGE SENSOR - A current sensing device ( | 01-16-2014 |
20140021939 | CURRENT-MEASURING DEVICE - The invention relates to a current measuring device for detecting a current flowing through a power line, said device comprising: a magnetic loop for receiving the power line; an excitation device designed to magnetise the magnetic loop by means of a periodic signal; a first current sensor designed to detect an exciting current flowing in the excitation device on the basis of the periodic signal and/or the current to be detected; and a determination device that determines a shift of the detected exciting current on the current axis, said shift being caused by the current, and, as a result, deduces the intensity of the current to be detected. The invention also relates to a solar inverter and to a method for detecting a current. | 01-23-2014 |
20140028289 | VOLTAGE SENSING IN ISOLATED CONVERTERS - A system for sensing voltage in an isolated converter includes an input circuit isolated from an output circuit using a first transformer, the first transformer having a primary coil and a secondary coil, wherein the output circuit includes an output inductor and an output capacitor, and wherein the input circuit includes a power source that provides power to the output circuit through the first transformer; a feedback winding coupled to the output inductor to form a second transformer; and a monitor circuit that calculates a voltage across the output capacitor using a voltage across the feedback winding, a voltage across the primary coil of the first transformer, a turns ratio of the first transformer, and a turns ratio of the second transformer in order to provide feedback to control the input circuit. | 01-30-2014 |
20140049250 | On The Enhancements of Planar Based RF Sensor Technology - A radio frequency sensor system includes a printed circuit board (PCB). The PCB includes a first exterior layer, a second exterior layer, a first interior layer, a second interior layer, and an inner perimeter that defines an aperture through the PCB. The PCB also includes a first loop. The first loop includes a first plurality of sensor pads coupled to a first plurality of vias by a first plurality of traces. The first plurality of sensor pads is arranged on the inner perimeter. The PCB also includes a second loop. The second loop includes a second plurality of sensor pads coupled to a second plurality of vias by a second plurality of traces. The second plurality of sensor pads is arranged on the inner perimeter. A core ring is embedded within the first interior layer proximal to the first plurality of sensor pads, the first plurality of vias, and the first plurality of traces. A center conductor, for carrying RF current, extends through the aperture. The first and second loops generate an electrical signal based on the first and second plurality of sensor pads, the first and second plurality of vias, the first and second plurality of traces, and the core ring. | 02-20-2014 |
20140103905 | ENERGY MONITORING DEVICE - A device and method are provided for monitoring voltage and current in a continuous conductor. A current sensor is configured to sense current in the continuous conductor. A voltage sense conductor is provided and a guided path is configured to bring the voltage sense conductor into contact with the continuous conductor at a pre-determined orientation. A communication interface is configured to receive information about a common reference voltage from a source, the source being external to the device. A voltage measuring circuit is configured to estimate voltage between a voltage sensed by the voltage sense conductor and the common reference voltage using the information about a common reference voltage. | 04-17-2014 |
20140111190 | CURRENT DETECTION DEVICE AND ELECTRICITY METER - A device including: a conductor through which a current to be measured flows; multiple coils arranged around the conductor; a first magnetic body provided to face one of end surfaces of each of the multiple coils and configured to magnetically short-circuit the multiple coils; and a second magnetic body provided to face another one of the end surfaces of each of the multiple coils, configured to magnetically short-circuit the multiple coils, and including through-holes through which coil wires from the multiple coils are passed, respectively, the through-holes being provided at positions facing the other end surfaces of the multiple coils, respectively. | 04-24-2014 |
20140125321 | Sensors - A current sensor comprises a first component comprising plural coils. Each coil comprises one or more turns printed on at least one planar surface of a respective substrate, and the planes of the coils are parallel to one another and are perpendicular to a longitudinal axis of the first component. A second component comprises soft magnetic material and has first and second planar faces that are at opposite ends of the first component and are arranged perpendicularly to and are intersected by the longitudinal axis of the first component. | 05-08-2014 |
20140167740 | SYSTEM AND METHOD FOR VOLTAGE AND CURRENT SENSING - A current sensor is disclosed. The current sensor includes a Rogowski coil disposed on a flexible printed circuit board with at least one active lead passing through the Rogowski coil. | 06-19-2014 |
20140176123 | CURRENT SENSOR - A current sensor includes: a core formed by U-shaped flat plates made of a magnetic body and stacked together; a flat plate-like conductor which is inserted on an interior side of a U-groove of the core and through which a current to be measured flows; a detection element which is arranged on the side of an opening of the U-groove in such a way that a detecting direction extends in a spacing direction of the opening, and which detects a strength of a magnetic field; a housing which supports the core, the conductor and the detection element; and a pair of spacing direction supporting portions which are provided at positions along the spacing direction on both sides of the detection element, in an opening-side end of the core, and which abut on the housing. | 06-26-2014 |
20140232376 | CURRENT SENSOR - A current sensor includes: a core having a groove where a conductor through which a current flows is inserted, with a direction of plate width aligned with a direction of depth of the groove; and a detector element arranged more closely to an opening of the groove than the conductor, with a direction of detection laid along a direction of a space of the groove, and detecting strength of a magnetic field. The core has a U-shaped portion whose surface facing the conductor is parallel to a surface defining the plate width, and narrow-width portions whose groove width and core width along the direction of the space gradually expands and gradually narrows, respectively, from both ends on the side of the opening of the U-shaped portion toward the side of the opening. Boundary portions between the U-shaped portion and the narrow-width portions are provided at a position facing the conductor. | 08-21-2014 |
20140320111 | CURRENT SENSOR BASED ON A ROGOWSKI COIL - A current sensor based on a Rogowski coil characterised in that it comprises a polygonal cross-section tube obtained from of one or more parts of rigid PCB, wherein the windings that form the Rogowski coil are located on the portions of rigid PCB which form the flat faces of said polygonal cross-section tube and wherein said one or more parts of rigid PCB are joined together by means of flexible zones which can bend in the form of an I, said polygonal cross-section tube being designed so that, during its use, the conductor whose current is required to be measured is situated along the tube's longitudinal axis. | 10-30-2014 |
20140320112 | CURRENT DETECTING DEVICE - A current detecting device includes an exciting coil ( | 10-30-2014 |
20140333292 | Self-Shielded Di/Dt Transformer for a Meter - A sensor includes a core, first and second windings, an integrating amplifier circuit and a DC balancing circuit. The first and second windings are wrapped around the core. The integrating amplifier circuit has a first input coupled to the first winding, and an output operably coupled to the second winding. The DC balancing circuit is operably coupled between the output of the integrating amplifier circuit and the first input of the integrating amplifier circuit. | 11-13-2014 |
20140333293 | CURRENT SENSOR - A current sensor includes: a magneto electric conversion element; and a magnetic field concentrating core applying a magnetic field caused by a measurement object current to the magneto electric conversion element. A planar shape of the magnetic field concentrating core perpendicular to a current flowing direction is a ring shape with a gap. The magneto electric conversion element is arranged in the gap. A part of a conductor for flowing the current is surrounded by the magnetic field concentrating core. The magnetic field concentrating core includes two first magnetic members and at least one second magnetic member, which are stacked alternately in the current flowing direction. Parts of the two first magnetic members adjacent to each other via the one second magnetic member are opposed to each other through a clearance or an insulator. | 11-13-2014 |
20140347037 | Apparatus for Mounting an Overhead Monitoring Device - An apparatus is provided for securing to and collecting power from an electrical conductor, including a current transformer comprising a core and an electrical winding that receives an induced current from magnetic flux generated according to alternating current present on the electrical conductor, and a clamping mechanism that attaches the apparatus to the electrical conductor. According to various aspects, apparatus may include a housing that encloses circuitry for monitoring conditions of the electrical conductor, where the circuitry includes one or more sensors, and wireless communications circuitry. | 11-27-2014 |
20140375304 | Pre-Settable Current Sensing Apparatus, System, and/or Method - The present invention relates to electromechanical device status monitoring and equipment protection applications for industrial automation, HVAC, and other implementations; and, more particularly, to the use of current sensing devices to detect loss-of-flow conditions. Presently described embodiments can comprise simplified, compact current sensing devices that can be economical to build, inventory, distribute, and purchase. Present embodiments can easily be calibrated and/or set by hand prior to installation, and they can be configured for automatically offering proof-of-flow detection based, at least in part, on the initially provided setting. | 12-25-2014 |
20150008903 | CURRENT SENSING DEVICE, AND METHOD OF MANUFACTURING THE SAME - A current sensing device and method of manufacturing a sensing device are disclosed. The current sensing device can include at least two current sensors, implemented in an openable ring-shaped support, and wherein the at least two current sensors can be arranged in a chain-like arrangement on the ring-shaped support, and wherein the at least two current sensors are electrically connected in series. | 01-08-2015 |
20150015244 | TEMPERATURE COMPENSATED CURRENT MEASUREMENT - A temperature compensated current measurement device comprises a Rogowski coil having a terminating impedance arranged to adjust the attenuation of the coil to balance changes in coil sensitivity so that the output voltage indicative of measured current remains substantially unchanged, the terminating impedance having different values above and below a threshold frequency. | 01-15-2015 |
20150084617 | Current Transducer For Measuring An Electrical Current - The present invention concerns current transducers for measuring a current flowing through a cable. The current transducers have a ferromagnetic core providing a substantially ring-shaped portion and at least two legs. The ring-shaped portion has one air gap or two air gaps. A magnetic field sensor is placed in or at each of the air gap(s). The ring-shaped portion forms a magnetic circuit that encloses the cable and guides the magnetic field generated by current to the air gap(s). Each leg extends from the center of the associated magnetic field sensor in a direction that runs perpendicularly to the longitudinal axis of the cable and has a certain length. The length of the legs is designed so long that at least two magnetic paths are formed which guide a component of an external magnetic field which extends in the direction of the legs around the magnetic field sensor(s). | 03-26-2015 |
20150102803 | CURRENT MONITORING DEVICE - According to one aspect, embodiments of the invention provide a current monitoring device comprising a current transformer configured to be removeably coupled to a power line and to generate a reference signal having a level related to a current level of the power line, a sensor circuit connected to the current transformer and configured to convert the reference signal to a measurement signal, a flexible cable having a first end and a second end, the first end coupled to the sensor circuit, and a connection portion coupled to the second end of the flexible cable and configured to be removeably coupled to a communications bus, wherein the sensor circuit is further configured to provide the measurement signal to the communication bus via the flexible cable and the connection portion. | 04-16-2015 |
20150108966 | ELECTRICAL CURRENT MEASURING APPARATUS AND METHOD - An apparatus for electrical current measurement. The apparatus may include a power input such as a current transformer that can be magnetically coupled to a line being measured. The apparatus may also include an energy harvesting circuit to parasitically harvest energy from the current transformer and an energy metering circuit to measure the current on the line. A controller can control the switching of a dynamic switch between an energy harvesting mode and an energy metering mode. The apparatus may also include a wireless transceiver. A plurality of these apparatuses may be combined into a network of devices to relay information from multiple current meters to a data concentrator and ultimately the Internet. | 04-23-2015 |
20150293157 | SYSTEMS AND METHODS FOR REDUCING ATTENUATION IN CURRENT TRANSDUCERS - A device includes a first axial ring, a first radial ring disposed below the first axial ring and a second radial ring disposed below the first axial ring. The first radial ring and the second radial ring are spaced apart in a radial direction. The device also includes an electrically non-conductive isolating ring disposed between the first axial ring and the first radial ring and a current sensor disposed between the first radial ring and the second radial ring. Further, the device includes a second axial ring disposed below the first radial ring, the second radial ring, and the current sensor. The first axial ring, the first radial ring, the second radial ring, and the second axial ring form a magnetic shield and an electrically conductive shell around the current sensor. The isolating ring disrupts the electrical continuity of the electrically conductive shell. | 10-15-2015 |
20150301087 | Differential current measuring module - A differential current measuring module is composed of a housing that encases a current transformer core and a printed circuit board, the current transformer core surrounding a line duct of the housing and having at least one secondary winding. The differential current measuring module is characterized in that in the line duct, at least one primary conductor is led out on a top side of the housing to be connected to an external electrical feed line and whose other end protrudes out of a bottom side of the housing and is provided with a solder terminal. The principle idea is based on continuing the electrical line to be monitored, in sections, as a primary conductor in the effective area of the current transformer core so as to advantageously arrive at a differential current measuring device whose integration is constructionally simple and which offers an uncomplicated connecting option. | 10-22-2015 |
20150309079 | POWER LINE MONITORING APPARATUS AND METHOD - Devices and methods for measuring an electrical characteristic, in particular, for measuring current are provided. The devices can use a pair of MEMS optical modulators as opposed to the more conventional coil and associated oil insulation arrangement. | 10-29-2015 |
20150309081 | SYSTEMS, APPARATUS, AND METHODS FOR ENERGY MONITORING - An apparatus for energy auditing can include a sensor portion on a circuit substrate, the sensor portion defining a first opening, an integrated inductor on the sensor portion, the integrated inductor being formed proximal to the first opening or a hall sensor located on the sensor portion proximal to the first opening, and an electronic circuit on a body portion of the circuit substrate electrically coupled to the integrated inductor and configured to wirelessly transmit information to a wireless receiver. | 10-29-2015 |
20150331020 | SYSTEM AND METHOD FOR VOLTAGE AND CURRENT SENSING - A current sensor includes a Rogowski coil disposed on a flexible printed circuit board with at least one active lead passing through the Rogowski coil. | 11-19-2015 |
20150338443 | TERMINAL BLOCK HAVING INTEGRATED CURRENT TRANSFORMERS - A terminal block for a power device includes a casing and a power cord. The terminal block is configured to be secured within the casing and to secure the power cord. The terminal block includes a body configured to fit within the casing of the power device. The body has at least one recess formed therein. The terminal block further includes at least one current transformer sized to fit within the at least one recess of the body. | 11-26-2015 |
20150346240 | ISOLATED AND SELF-CALIBRATING VOLTAGE MEASUREMENT SENSOR - According to one aspect, embodiments described herein provide a sensor comprising a housing configured to be coupled around a portion of the transmission line, at least one probe capacitor configured to encircle the portion of the transmission line with the housing coupled around the portion of the transmission line, a measurement capacitor configured to encircle the portion of the transmission line with the housing coupled around the portion of the transmission line, a capacitance acquisition system, and a voltage measurement system, wherein the capacitance acquisition system is configured to determine a first value related to capacitance of the at least one probe capacitor, and based on the first value, determine a second value related to capacitance of the measurement capacitor, and wherein the voltage measurement system is configured to receive a signal providing the second value and calculate a third value related to a voltage level of the transmission line. | 12-03-2015 |
20150362528 | VOLTAGE SAMPLING SYSTEM - A voltage sampling system is provided. The voltage sampling system includes a voltage sampling device, two optic-fiber transmission lines and a control device. The voltage sampling device includes a voltage-dividing resistor module, a common mode rejection circuit and an analog-to-digital converter. The voltage-dividing resistor module generates a first and a second divided voltages according to a voltage source. The common mode rejection circuit receives the first and the second divided voltages to perform a common-mode noise rejecting process to generate an output voltage. The analog-to-digital converter converts the output voltage to generate a digital data signal. The two optic-fiber transmission lines transmit the digital data signal and a clock signal respectively. The control device receives the digital data signal from the analog-to-digital converter and the clock signal to perform a digital data processing. | 12-17-2015 |
20150362531 | Edison Base Fuse Meter for Power Metering - An Edison base fuse meter includes a female Edison base connector, a male Edison base connecter, a socket extender, and two current transformer wires. The socket extender is physically connected in between the female Edison base connector and the male Edison base connector. The socket extender includes at least two wires that electrically connect the terminals of the female Edison base connector and the male Edison base connector. The socket extender includes a current transformer that surrounds one or more wires of the at least two wires so that a transformer current is induced in the current transformer in response to a current in the one or more wires. The two current transformer wires are electrically connected to each end of the current transformer. The two current transformer wires are used for externally measuring the transformer current induced in the current transformer. | 12-17-2015 |
20150369846 | PROCESSOR DEVICE FOR PROCESSING SIGNALS IN AN ELECTRICAL INSTALLATION - A signal processor device comprising: first input means intended to be connected, via a measurement sensor, to a high-voltage signal of an electrical installation; and processor means for analyzing the signal measured by said sensor; the device further comprising:
| 12-24-2015 |
20150369848 | Method for Operation of a Self-Powered Power Sensor (SPPS) Having a Reservoir Capacitor - Methods of operation of a self-powered power sensor (SPPS) are provided for the measurement of the likes of current, power, power factor, and other parameters related to the power consumption, at points of interest, such as circuit breakers, machines, and the like. Each SPPS is enabled to communicate its respective data, in an environment of a plurality of such apparatuses, to a management unit which may further process the data sent thereto, as well as communicate back to the SPPS for the purpose of synchronization of, for example, clocks of the SPPS and the management unit. | 12-24-2015 |
20160003873 | Method and Apparatus for Detecting and Compensating Measurement Errors Due to Transformer Saturation in a Meter - A current measurement circuit includes an integrator, first and second transformers, and a current measurement unit. The first transformer includes a first winding about a magnetic core. The magnetic core has an opening through which a current to be measured passes. The first winding is configured to generate a first current based on a first flux in the magnetic core. The second transformer includes second and third windings. The second winding is coupled to receive the first current from the first winding. The second winding has a terminal coupled to the third winding. The third winding is coupled to a first input of the integrator circuit. The output of the integrator circuit is operably coupled to provide an error current to the second transformer. The current measurement unit measures the current through the second winding of the second transformer. | 01-07-2016 |
20160011247 | METERING CIRCUIT APPARATUS AND METHOD FOR IMPLEMENTING METERING | 01-14-2016 |
20160025778 | MEASURING APPARATUS AND MEASURING METHOD - A measuring apparatus has a physical amount transformer that transforms a physical amount into a current, a measuring circuit that measures an output current of the physical amount transformer, a power supply circuit that inputs an output of the measuring circuit, a circuit switching unit that switches between a first state and a second state, the first state constituting a circuit inputting the output of the measuring circuit into the power supply circuit, the second state constituting a circuit directly inputting the output of the measuring circuit into the physical amount transformer, and a switching controller driven by the power supply circuit to control the circuit switching unit. | 01-28-2016 |
20160041204 | SENSOR DEVICES AND METHODS FOR USE IN SENSING CURRENT THROUGH A CONDUCTOR - A sensor device for use in detecting current in a conductor is provided. The sensor includes a non-magnetic substrate defining an aperture structured to receive a conductor therein, a coil comprising a plurality of turns wound about at least a portion of the substrate, and a housing for enclosing the substrate and coil. The housing includes a dielectric material having a dielectric constant and positioned adjacent to the coil and at least partially within the aperture such that the dielectric material is disposed between the coil and the conductor when the conductor is received through the aperture and at least one spacer coupled to the aperture to facilitate maintaining a position of the coil relative to the conductor, wherein each of the spacers is positioned offset from the dielectric material such that each of the spacers does not radially extend between the coil and the conductor. | 02-11-2016 |
20160054359 | CURRENT MEASUREMENT DEVICE AND CURRENT CALCULATION METHOD - This current measurement device includes a conductor, a first terminal block, a pair of detection coils and a current calculator. A magnetic field, proportional to the magnitude of a conducted to-be-measured current, is generated around the conductor. The first terminal block has a placement surface on which the conductor is disposed. The pair of detection coils has the configuration, connected in series and in opposite polarities, and disposed on the placement surface of the first terminal block such that the conductor is between the pair of detection coils, and each coil is spaced from the conductor by an insulating distance. The detection coils output an inductive voltage signal produced by the magnetic field generated by the conductor and an external magnetic field which is magnetic noise. A current calculator calculates the value of the to-be-measured current on the basis of the inductive voltage signals from the pair of detection coils. | 02-25-2016 |
20160054360 | CURRENT MEASUREMENT APPARATUS, DEVICE-BEHAVIOR DETECTION SYSTEM, CURRENT MEASUREMENT METHOD, AND PROGRAM - The current measurement apparatus measures the current flowing through a power cable that connects electrical equipment to an AC power source that supplies power to the electrical equipment. Said current measurement apparatus is provided with the following: a sensor that sandwiches the power cable and detects the common mode current flowing therein; a determiner that acquires current information indicating change in the detected common mode current; and a transmitter that transmits the acquired current information to a control apparatus that detects the operating state of the electrical equipment. | 02-25-2016 |
20160061862 | POWER EXTRACTION FOR A MEDIUM VOLTAGE SENSOR USING A CAPACITIVE VOLTAGE DIVIDER - A sensor unit coupled to a first wire of a power line for measuring power-related parameters of the power line. The sensor unit contains a first capacitor and makes voltage measurements relative to another wire, to which the sensor unit is coupled by a second capacitor. The captors form a voltage divider such that the sensor unit may measure a voltage in a range much lower than the voltage on the power line. Additionally, the capacitive voltage divider yields a voltage that can be used to power the sensor unit, including by charging an energy storage device. The sensor unit may also supply power to other nearby devices, such as other devices that form a mesh sensor network. | 03-03-2016 |
20160069933 | POWER METER WITH AUTOMATIC CONFIGURATION - A power monitoring system includes a plurality of current sensors suitable to sense respective changing electrical current within a respective conductor to a respective load and a conductor sensing a respective voltage potential provided to the respective load. A power monitors determines a type of circuit based upon a signal from at least one of the current sensors and a signal from the conductor, wherein the type of circuit includes at least one of a single phase circuit, a two phase circuit, and a three phase circuit. The power meter configures a set of registers corresponding to the determined type of circuit in a manner such that the configuring is different based upon each of the single phase circuit, two phase circuit, and three phase circuit suitable to provide data corresponding to the determined type of circuit. | 03-10-2016 |
20160069934 | Distribution Line Clamp Force Using DC Bias on Coil - A power distribution monitoring system is provided that can include a number of features. The system can include a plurality of monitoring devices configured to attach to individual conductors on a power grid distribution network. In some embodiments, a monitoring device is disposed on each conductor of a three-phase network and utilizes a split-core transformer to harvest energy from the conductors. The monitoring devices can be configured to harvest energy from the AC power grid and apply a DC bias to core halves of the split-core transformer to maintain a positive magnetic force between the core halves. Methods of installing and using the monitoring devices are also provided. | 03-10-2016 |
20160077133 | ROGOWSKI COIL AND CURRENT MEASUREMENT SENSOR INCLUDING THE SAME - There is provided a current measurement sensor including: a rogowski coil having a winding coil disposed on an outer circumference part of a coaxial coil; a body case to which one end and the other end of the rogowski coil are coupled, so that the rogowski coil forms a loop; and a coupling member coupling the rogowski coil to the body case, wherein the coupling member includes: a coil coupling member having one side coupled to the rogowski coil and the other side coupled to the body case, and a case coupling member coupled to the body case and covering a coupling part between the coil coupling member and the body case. | 03-17-2016 |
20160084879 | CLAMP METER AND CLAMP PROBE - The present application relates to a clamp meter and a clamp probe that can be matched for use with the clamp meter. The clamp meter comprises a main meter body having an interfacing connector and one or more clamp probes, wherein each of the clamp probes is detachably connectable to the interfacing connector of the main meter body. Each of the clamp probes has a converting unit that converts a signal measured by the clamp probe to an output measurement signal within a predetermined measurement range of the main meter body, and each of the clamp probes has an identity indicator readable by the main meter body. As the clamp meter according to the present application can be matched with a plurality of clamp probes having different measurement ranges, a user only needs to purchase one main meter body and one or more clamp probes of different models to meet various measuring needs. This can enhance the flexibility and extendibility of the usage of a clamp meter, as well as reduce the user's financial burden. | 03-24-2016 |
20160091533 | DETECTOR FOR OVERHEAD NETWORK AND OVERHEAD NETWORK COMPRISING SUCH A DETECTOR - This detector ( | 03-31-2016 |
20160091535 | WIRELESS ROGOWSKI COIL SYSTEM - A Rogowski coil in a sensor unit has voltage induced by a conductor surrounded by the Rogowski coil. The voltage is integrated to represent current which is converted to digital data representing current in the conductor and sent wirelessly to a multimeter. The sensor unit may receive control signals from the multimeter. A plurality of sensor units may be networked and controlled by a remote control apparatus. | 03-31-2016 |
20160097794 | CURRENT SENSING INDUCTIVE DEVICES WITH INTEGRATED BUS BAR - A low-cost and high-precision current sensing device and methods for use and manufacturing. In one embodiment, the current sensing apparatus comprises a Rogowski-type coil which is manufactured in segments so as to facilitate the manufacturing process. In an exemplary embodiment, the current sensing apparatus segments comprise a number of bobbin elements that are wound and subsequently formed into complex geometric shapes such as torus-like shapes. In an alternative embodiment, bonded windings are utilized which allow the segments to be formed without a bobbin or former. In yet another alternative embodiment, the aforementioned current sensing devices are stacked in groups of two or more. Methods of manufacturing and using the aforementioned current sensing apparatus are also disclosed. | 04-07-2016 |
20160116504 | PCB ROGOWSKI COIL - Disclosed is a PCB Rogowski coil, comprising two groups of first cons and second coils which are connected in series and have opposite winding directions, wherein the first coil and the second coil respectively contain a plurality of wire turns. One wire turn of the first coil comprises an inlet wire, a winding wire and an outlet wire. The winding wires of each wire turn of the first coil are arranged in parallel with each other. The winding wires are respectively arranged on both the upper surface and the lower surface of a PCB board, with the inlet wire passes through a via hole on the PCB board and is connected to the winding wire. The winding wire then passes through another via hole and is connected to the outlet wire. The outlet wire is finally connected to the inlet wire of the next wire turn of the first coil. Similarly, one wire turn of the second coil comprises an inlet wire, a winding wire and an outlet wire. The the winding wires of each wire turn of the second coil are arranged in parallel with each other, with the winding wires respectively arranged on both the upper surface and the lower surface of the PCB board. The inlet wire is connected to the winding wire. The winding wire then passes through a via hole on the PCB board and is connected to the outlet wire after being led out from another via hole. The outlet wire is finally connected to the inlet wire of the next wire turn of the second coil. The interference of an external magnetic field is therefore markedly eliminated, and the anti-external interference capability of a Rogowski coil is improved. | 04-28-2016 |
20160116505 | ENERGY HARVEST SPLIT CORE DESIGN ELEMENTS FOR EASE OF INSTALLATION, HIGH PERFORMANCE, AND LONG TERM RELIABILITY - A power distribution monitoring system is provided that can include a number of features. The system can include a plurality of power line sensing devices configured to attach to individual conductors on a power grid distribution network. In some embodiments, the power line sensors can include a split-core transformer. In some embodiments, a power line sensing device is disposed on each conductor of a three-phase network. The sensing devices can be configured to measure and monitor, among other things, current and electric-field on the conductors. Methods of installing, sealing, and protecting the split-core transformers of the power line sensors are also discussed. | 04-28-2016 |
20160118724 | COMPACT ELECTRICAL CONNECTION SYSTEM - An electrical connection system ( | 04-28-2016 |
20160124024 | SELF-CORRECTING CURRENT TRANSFORMER SYSTEM - A self-correcting current transformer | 05-05-2016 |
20160124025 | CURRENT SENSOR ARRANGEMENT WITH MEASURING COILS - The invention relates to a current sensor arrangement having a measuring inductance ( | 05-05-2016 |
20160131504 | Power Monitoring Systems and Methods - A power monitoring system of the present disclosure has a power monitoring device that couples to at least one conductor of a transformer and collect data indicative of power usage corresponding to the at least one conductor. Additionally, the power monitoring system may have a protective cover that may comprise a top plate having an arch-shaped back edge adapted to abut and conform with an outside surface of a transformer, a face plate integral with and extending from the top plate and mirroring the outside surface of the transformer, and a bottom plate integral with and extending from the face plate and having an arch-shaped back edge adapted to reasonably abut and conform with the outside surface of the transformer. | 05-12-2016 |
20160131682 | CURRENT SENSOR ARRANGEMENT - The invention relates to a current sensor arrangement comprising a measuring inductor, said measuring inductor having the following features: a first planar measuring coil ( | 05-12-2016 |
20160146857 | APPARATUS FOR DETECTING AC COMPONENTS IN A DC CIRCUIT AND USE OF THE APPARATUS - A device for detecting alternating-current components i | 05-26-2016 |
20160154026 | ELECTRICAL CURRENT TRANSDUCER WITH ELECTROSTATIC SHIELD | 06-02-2016 |
20160154027 | ELECTRICAL CURRENT TRANSDUCER | 06-02-2016 |
20160154028 | ELECTRONIC DEVICE FOR MEASURING A DIFFERENTIAL CURRENT IN AN ELECTRIC LINE | 06-02-2016 |
20160161530 | CURRENT SENSING CIRCUIT - A current sensing circuit includes: a current sensing transformer including a primary coil connected to an input terminal of a converter and a secondary coil; a first current path connected to the secondary coil, including a first resistor, and configured to allow a forward current induced in the secondary coil to flow therethrough; and a second current path connected to the secondary coil, including a second resistor, and configured to allow a reverse current induced in the secondary coil to flow therethrough, wherein the first current path further includes at least one voltage drop element disposed between the secondary coil and the first resistor. | 06-09-2016 |
20160202294 | HYBRID CLOSED-LOOP/OPEN-LOOP MAGNETIC CURRENT SENSOR | 07-14-2016 |
20160202306 | DEVICE FOR DETECTING OPEN PHASE OF CONNECTION LINE OF STANDBY TRANSFORMER IN NUCLEAR POWER PLANT BY USING ROGOWSKI COIL | 07-14-2016 |
20170234909 | SLIDE CLOSURE CURRENT TESTER | 08-17-2017 |
20180024169 | FULL WAVE RECTIFIED ISOLATED CURRENT SENSOR | 01-25-2018 |
20190146008 | SPLIT CORE CURRENT SENSOR | 05-16-2019 |
20190146014 | Current Measurement Circuit | 05-16-2019 |