Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 21 - Arrangements for measuring electric power or power factor
Patents for G01R 21 - Arrangements for measuring electric power or power factor (6,609)
09/1998
09/17/1998DE19709670A1 Electricity meter
09/09/1998EP0862746A1 Electronic metering device including automatic service sensing
09/09/1998CN2290941Y Intelligence integratly metering lighting distributing box
08/1998
08/25/1998CA2083216C Electrical energy meter with a precision integrator for current measurement
08/18/1998CA2083308C Power factor matching in an ac power meter
08/12/1998EP0857978A2 Programmable electrical energy meter and methods therefor
08/05/1998CN1189754A Mobile station having drift-free pulsed power detection method and apparatus
07/1998
07/29/1998CN1188895A Measuring equipment for electricity meter
07/28/1998US5786683 Electric supply control
07/23/1998WO1998018013A3 Energy meter with power quality monitoring and diagnostic systems
07/23/1998CA2228025A1 Electronic unit for measuring electric energy
07/22/1998EP0854365A2 Numerical comparator
07/15/1998EP0853364A2 Method for measuring a single electrical power load in electrical distribution networks
07/14/1998US5781425 Method and device for control of a converter installation
06/1998
06/24/1998EP0848825A1 Electricity meter
06/24/1998CN1185838A Electronic metering device with automatic service sensor
06/24/1998CN1185584A Detection circuit for maximum power point
06/17/1998EP0848258A1 Measuring appliance for electricity meter
06/17/1998EP0787304A4 Numerical comparator
06/17/1998CN1184939A Real-time calibration microwave radiometer
06/16/1998US5768148 Man machine interface for power management control systems
06/09/1998US5764523 Electronic watt-hour meter
06/09/1998US5764044 Process for producing time dependent waveforms of positive and negative symmetrical sequence components of a power system's voltages or currents
06/03/1998EP0799443A4 System power consumption tracking and reporting
06/03/1998CN1183860A Energy management and building automation system
05/1998
05/20/1998EP0843420A2 Mobile station having drift-free pulsed power detection method and apparatus
05/19/1998US5754421 Power monitoring
05/13/1998EP0840896A1 Electricity meter
05/12/1998USRE35793 Measuring and monitoring system
05/12/1998US5749654 Calorimetric wattmeter for testing microwave ovens
05/05/1998US5747985 Optical-electronic demand meter using optical metering outfit
04/1998
04/30/1998WO1998018013A2 Energy meter with power quality monitoring and diagnostic systems
04/30/1998WO1998018012A2 Electrical energy meter oscillator compensation
04/29/1998EP0627083B1 Method and apparatus for electronic meter testing
04/28/1998US5745114 Graphical display for an energy management device
04/28/1998US5745063 Arrangement for the summation of products of signals
04/28/1998US5745016 Method for improving power measurement implemented with a directional coupler at low power levels
04/28/1998CA2130093C Method and apparatus for measuring voltage
04/21/1998US5742512 Electronic electricity meters
04/21/1998US5742153 Power supply for an electronic circuit that measures ac power line signals
04/07/1998US5737730 Measuring process for measuring chargeable electrical consumption from an electrical network and electronic electricity meter
04/07/1998US5737231 Metering unit with enhanced DMA transfer
04/07/1998US5736848 Analog-to-digital measurement and calibration system for electrical energy
04/07/1998US5736847 Power meter for determining parameters of muliphase power lines
04/02/1998WO1998013699A1 Electrical power measuring device and method
04/02/1998DE19639410A1 Meßeinrichtung für elektrische Leistung Measuring device for electrical power
03/1998
03/25/1998CN1177128A Method for checking and calibrating three phase electric power instrument
03/19/1998WO1998011447A1 Current measurement methods and apparatus employing second harmonic scaling
03/12/1998WO1998010394A1 Automatic meter reading data communication system
03/12/1998WO1998010299A1 Electronic electric meter for networked meter reading
03/10/1998US5726901 System for reporting computer energy consumption
03/10/1998US5726566 Apparatus for measuring an RF parameter
02/1998
02/10/1998US5717478 Photovoltaic module with liquid crystal display indicator
02/10/1998US5717327 Current sensor
02/10/1998US5717325 Multiprocessing transient event detector for use in a nonintrusive electrical load monitoring system
02/05/1998WO1998004926A1 Sigma-delta multiplier circuit for power measurement equipment
02/05/1998DE19630605A1 Multiplikationsschaltung für Leistungs-Meßgerät Multiplication circuit for power meter
02/03/1998US5715390 Method and apparatus for providing upgrades in electricity meters
01/1998
01/28/1998CN2273420Y Digital instrument for measuring lower-middle-frequency power
01/13/1998US5708590 Method and apparatus for real time recursive parameter energy management system
01/07/1998EP0815457A1 Electricity meter
01/07/1998EP0653070B1 High speed power analyzer
01/06/1998US5706204 Apparatus for triggering alarms and waveform capture in an electric power system
12/1997
12/23/1997US5701253 Isolated current shunt transducer
12/17/1997CN1036751C Modulated dither signal
12/16/1997US5699276 Utility meter providing an interface between a digital network and home electronics
12/09/1997US5696695 System for rate-related control of electrical loads
12/09/1997US5696441 Linear alternating current interface for electronic meters
12/02/1997US5694607 System power consumption tracking and reporting
12/02/1997US5694103 Laminated figure 8 power meter core
11/1997
11/25/1997US5691634 Wye service power meter
11/20/1997DE19720214A1 Output maximum point detection circuit having output detection unit
11/13/1997WO1997042511A1 Method and apparatus for measuring of electrical power and use thereof
11/13/1997DE19606927A1 Electronic energy meter with two analogue-digital converters
11/05/1997EP0804739A1 Electricity measurement apparatus and method
11/04/1997US5684710 System for measuring electrical power interruptions
10/1997
10/29/1997EP0803741A1 Method and apparatus for electronic testing of electricity meters
10/29/1997EP0803732A2 Laminated figure 8 power meter core
10/29/1997CN1163436A Arithmetic and logic unit
10/29/1997CN1163406A Integrated pulse counter
10/23/1997WO1997039363A1 Apparatus for the measurement of electrical energy consumption
10/22/1997EP0801836A2 Energy management and building automation system
10/15/1997CN2264916Y Sensor of intelligent watt-hour meter
10/15/1997CN1162120A Method for synchronously metering three-phase/single-phase fundamental electrical energy and harmonic electrical energy and electric meter thereof
10/09/1997WO1997037418A1 Method and device for determining short-circuit power in an electric power network
10/08/1997EP0799443A1 System power consumption tracking and reporting
10/07/1997US5675754 For an ac load control device
10/02/1997DE19613735A1 Generation of signal proportional to active power in AC circuit
10/02/1997DE19613732A1 Generation of signal proportional to reactive power in AC circuit
09/1997
09/30/1997US5673196 Vector electricity meters and associated vector electricity metering methods
09/17/1997EP0795948A1 System for utility demand monitoring and control
09/16/1997US5668538 Modular electricity meter arrangement having remotely controllable switch
09/03/1997EP0793107A2 Apparatus for triggering alarms and waveform capture in an electric power system
09/03/1997EP0793106A2 Arithmetic unit
09/03/1997EP0793104A2 Electrical system monitoring apparatus with programmable custom display
09/02/1997US5663638 Calorimetric RF power meter with dynamic zeroing and constant temperature and power dissipation in the calorimetric bridge
08/1997
08/28/1997CA2198660A1 Apparatus for triggering alarms and waveform capture in an electronic power system
08/26/1997US5661658 Electrical system monitoring apparatus with programmable custom display
08/20/1997EP0790503A1 Radiofrequency power measuring device
08/19/1997US5659242 Apparatus for comparing two waveforms in real time
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