| Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609) |
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| 08/09/2000 | CN1262158A Arc voltage method and system for sensing perforation state of plasma welding's molten bath |
| 08/09/2000 | CN1055338C Compensation method for increasing metering precision of electronic watt-hour meter |
| 08/03/2000 | WO2000045183A2 Electrical energy meter |
| 08/01/2000 | US6097182 Electrical energy meter for 3-wire delta service |
| 07/25/2000 | US6094622 System and method for automatically determining the electrical energy service type to which an energy meter is connected |
| 07/19/2000 | EP1020279A1 Power consumption display device for machine |
| 07/19/2000 | EP1019882A1 Automatic meter reading data communication system |
| 07/19/2000 | EP1019737A2 Method and apparatus for electrical power measurement |
| 07/19/2000 | CN1054688C Integrated pulse counter |
| 07/18/2000 | US6091237 Three-phrase clamp-type power meter |
| 07/18/2000 | CA2130433C Electrical energy meter and methods therefor |
| 07/13/2000 | WO2000040977A1 Revenue meter having precision time clock |
| 07/13/2000 | WO2000040976A1 Utility metering system having waveform capture for power quality monitoring |
| 07/13/2000 | CA2358606A1 Revenue meter having precision time clock |
| 07/12/2000 | EP1018022A2 Energy meter with power quality monitoring and diagnostic systems |
| 07/06/2000 | WO2000020822A3 High linearity, low offset interface for hall effect devices |
| 07/05/2000 | EP1015897A1 Utility meter providing an interface between a digital network and home electronics |
| 07/05/2000 | EP0928423B1 Electrical power measuring device and method |
| 07/04/2000 | US6084394 Electronic measuring device using a correction factor to compensate for measuring errors |
| 06/28/2000 | EP1012608A4 Electronic revenue meter with automatic service sensing |
| 06/28/2000 | EP1012608A1 Electronic revenue meter with automatic service sensing |
| 06/28/2000 | CN1053965C Method and apparatus for displaying measured electric energy by electronic mode |
| 06/27/2000 | US6081204 Automated communication of electricity meter data |
| 06/21/2000 | EP1010015A2 Measuring system for measuring the power and/or the power factor at at least one measuring point in an alternating voltage network |
| 06/20/2000 | US6078870 Electricity meter with multiplexers for monitoring measurement channels |
| 06/08/2000 | WO2000033230A1 System and method for frequency compensation in an energy meter |
| 06/06/2000 | CA2040282C Method and apparatus for digitally measuring electrical energy consumption |
| 05/31/2000 | EP1004883A1 Wide-band high-frequency signal power detecting element and power detector using the same |
| 05/30/2000 | CA2180538C Measuring process for measuring chargeable electrical consumption from an electrical network and electronic electricity meter |
| 05/30/2000 | CA2172762C Load loss standard for calibrating power loss measurement systems |
| 05/23/2000 | CA2142947C Apparatus and method for reading utility meters |
| 05/18/2000 | DE19954348A1 Electrical power measuring system for radio communications device, uses digital filter network for simultaneous frequency band limitation and signal mixing |
| 05/16/2000 | US6064192 Revenue meter with integral current transformer |
| 05/11/2000 | DE19849580A1 Measuring available effective power or source reflection factor at reference impedance of signal generator involves measuring three or more load reflection factors and respective effective powers delivered by signal generator |
| 05/10/2000 | CN1052305C Wide band flat power detector and its power indicating signal producing method |
| 05/03/2000 | CN1052073C Current measuring circuit comprising mutually couples transformer and integration circuit |
| 05/02/2000 | US6058354 Electricity meter to measure electrical physical magnitudes which are parameters or functions of measured voltages and/or currents |
| 04/26/2000 | EP0995124A1 Device for monitoring one or more consumption meters |
| 04/20/2000 | DE19844419A1 Determining phase angle between two signals, e.g. for digital metering |
| 04/13/2000 | WO2000020822A2 High linearity, low offset interface for hall effect devices |
| 04/13/2000 | CA2345647A1 High linearity, low offset interface for hall effect devices |
| 04/12/2000 | CN1051373C Distribution transformer high voltage metering apparatus |
| 04/06/2000 | DE19842241A1 Elektrizitätszähler und Eingangsbaustein für einen Elektrizitätszähler Electricity metering and input component for an electricity meter |
| 03/23/2000 | WO2000016109A1 Electricity meter and an input module for an electricity meter |
| 03/23/2000 | DE19844288A1 Effective AC power measurement method |
| 03/21/2000 | US6040690 Electricity measurement using two conductors |
| 03/15/2000 | EP0985152A1 Commodity consumption meter |
| 03/14/2000 | US6037763 Electricity measurement apparatus using hall effect sensor having rectified bias current |
| 03/09/2000 | DE19838411A1 Method to identify faults of electric operating device; uses active power, distorting and displacement wattless powers, unsymmetrical actual and differential powers |
| 03/02/2000 | DE19838029A1 Coaxial high frequency power measurement head for calorimetric measurement of high frequency power; uses Bragg grating or Fabry-Perot resonator as absorber |
| 02/29/2000 | US6031369 Electricity meter having circuitry for selecting the conditioning of a power signal according to the polarity of an A.C. mains signal |
| 02/23/2000 | EP0981053A1 Programmable monitoring device for electric consumption |
| 02/23/2000 | EP0980530A1 Measurement of microwave radiation |
| 02/23/2000 | EP0980529A1 Apparatus for the measurement of microwave radiation |
| 02/15/2000 | US6026355 Solid state watt-hour meter using GMR sensor |
| 02/15/2000 | CA2021092C Electronic watthour meter |
| 02/14/2000 | CA2685426A1 Reduced cost automatic meter reading system and method using locally communicating utility meters |
| 02/14/2000 | CA2685207A1 Reduced cost automatic meter reading system and method using locally communicating utility meters |
| 02/14/2000 | CA2685205A1 Reduced cost automatic meter reading system and method using locally communicating utility meters |
| 02/08/2000 | US6023160 Electrical metering system having an electrical meter and an external current sensor |
| 02/01/2000 | US6020734 Electrical utility meter with event-triggered window for highest demands logging |
| 01/27/2000 | WO2000004392A1 An electrical supply measurement and management system |
| 01/26/2000 | CN2360856Y Watt-hour meter pulse converter |
| 01/26/2000 | CN1242836A Electronic revenue meter with automatic service sensing |
| 01/25/2000 | US6017147 Calorimetric wattmeter for testing microwave ovens |
| 01/25/2000 | CA2155539C Remote automatic meter reading apparatus |
| 01/20/2000 | WO2000003262A2 Improvements relating to electrical power measurement |
| 01/19/2000 | EP0972364A1 Power detection circuit |
| 01/11/2000 | US6014021 Electricity meter using fuzzy logic circuit |
| 01/06/2000 | WO2000000935A1 Electronic electricity meter |
| 01/06/2000 | CA2301700A1 Electronic electricity meter |
| 01/05/2000 | EP0969286A2 An apparatus for the determination of electrical power and a method of testing or calibrating a plurality of such apparatus |
| 12/30/1999 | DE19827345A1 Deriving effective power of electrical loads for power management |
| 12/29/1999 | WO1999067653A1 Layered current sensor |
| 12/28/1999 | US6008643 Offset reduction and separation of hall and piezoresistive voltages through current injection |
| 12/28/1999 | US6008635 Electricity meter |
| 12/23/1999 | DE19826906A1 Determining cos phi from amplitude ratio of apparent power |
| 12/21/1999 | US6006212 Time-of-use and demand metering in conditions of power outage with a mobile node |
| 12/21/1999 | US6005384 Methods and apparatus for oscillator compensation in an electrical energy meter |
| 12/16/1999 | DE19924550A1 Method for continual measurement, analysis and evaluation of multichannel current and voltage signals |
| 12/08/1999 | CN2352966Y D/A double displaying electric power meter |
| 12/08/1999 | CN1237710A Multiloop detector and divided current converter for said detector |
| 12/02/1999 | WO1999062177A1 Method for deriving or calibrating a frequency of a clock signal |
| 12/02/1999 | WO1999061926A1 Wide-band high-frequency signal power detecting element and power detector using the same |
| 12/01/1999 | EP0961411A1 Procedure for deriving a clock frequency |
| 12/01/1999 | EP0961124A2 Multicircuit type instrument and split type current transformer for measuring various electric power quantities |
| 12/01/1999 | EP0961123A1 Method and apparatus for the continuous detection, analysis and evaluation of current and voltage signals |
| 12/01/1999 | EP0961122A1 Electricity meter with a base-meter comprising a microcomputer, which is equipped with one or a number of interchangeable meter-modules |
| 11/30/1999 | US5995022 Method and apparatus for executing a command in a plurality of electrical metering devices |
| 11/25/1999 | WO1999060415A1 Apparatus and method for detecting tampering in a multiphase meter |
| 11/18/1999 | WO1999058987A1 Method for transmitting and storing value and value store electric power meter using the same |
| 11/18/1999 | CA2332113A1 Method for transmitting and storing value and value store electric power meter using the same |
| 11/03/1999 | CN1234120A Energy meter with power quality monitoring and diagnostic system |
| 11/03/1999 | CN1234119A Method and apparatus for oscillator compensation in electrical eneryg meter |
| 11/02/1999 | US5978741 Vacuum fixture |
| 10/28/1999 | DE19816462A1 Digital electricity meter |
| 10/19/1999 | CA2018259C Input circuit for an electrical energy meter |
| 10/14/1999 | DE19910902A1 Measurement value detection and indicating system produces graphic indication of summation distribution function CDF of measurements of peak-average output ratio of digital modulated RF signal and ideal |
| 10/07/1999 | DE19814228A1 Method to determine real-time power consumption for individual users in heat and power co-operative and to display tariff |
| 10/06/1999 | CN1230688A Electric power calculating device |