Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850)
11/1998
11/04/1998EP0874998A1 Optical measuring method and device for measuring a magnetic alternating field with an expanded measuring range and good linearity
11/04/1998EP0739489B1 Measuring process for measuring chargeable electrical consumption from an electrical network and electronic electricity meter
11/04/1998CN2296535Y Safety reliable inductive test pencil
11/04/1998CN2296534Y Reliable inductive test pencil
11/04/1998CN1198033A Charge and discharge coatrol circuit
11/03/1998US5832414 Generator protection system and method of compensating for errors in phasor estimation due to oscillations in discrete Fourier transform
11/03/1998US5832413 Generator protection system and method for phasor estimation and frequency tracking during frequency ramping
11/03/1998US5831427 Voltage measuring device for a source with unknown resistance
11/03/1998US5831426 Magnetic current sensor
11/03/1998US5831425 Bus bar structure for electrical junction box
11/03/1998US5831424 Isolated current sensor
11/03/1998US5831302 Voltage reference circuit
10/1998
10/29/1998WO1998048525A2 An arrangement in a subscriber line interface circuit
10/29/1998WO1998048287A1 Device with wide pass band for measuring electric current intensity in a conductor
10/29/1998DE19717811A1 Monitoring circuit for at least one supply voltage
10/29/1998CA2288907A1 An arrangement in a subscriber line interface circuit
10/28/1998EP0873583A2 Digital current differential system
10/28/1998CN2296013Y Centralized digit wattmeter
10/28/1998CN2296012Y Assembled high pressure tester
10/27/1998US5828983 Method and apparatus for processing a sampled waveform
10/27/1998US5828576 Power monitor apparatus and method with object oriented structure
10/27/1998US5828308 Current sensing circuit formed in narrow area and having sensing electrode on major surface of semiconductor substrate
10/27/1998US5828240 Differential cross coupled peak detector
10/27/1998US5828209 Voltage reference arrangement, a voltameter, a battery voltage detection arrangement, and a wireless communication device
10/27/1998US5828201 Method for maintaining the charge capacity of traction battery modules of a hybrid electric vehicle
10/21/1998EP0872790A2 Power supply voltage detection device
10/21/1998EP0775348B1 Method of detecting signals by means of fuzzy-logic classification
10/21/1998CN2295222Y All-weather test pencil
10/21/1998CN2295221Y Light-beam digital double-display fitting type electric meter
10/20/1998US5825656 Apparatus and method for power disturbance analysis by display of power quality information
10/20/1998US5825190 Method and apparatus for measuring a transfer impedance of shielded devices and common mode currents in shieldings
10/20/1998US5825174 Device for measuring the voltage of a voltage source
10/20/1998US5825153 Current measuring apparatus
10/14/1998EP0871036A2 Front-end architecture for a measurement instrument
10/14/1998EP0745245A4 Fast responding method and apparatus for three phase a/c voltage sensing
10/14/1998CN2294476Y Secondary loop multipurpose tester
10/13/1998US5821869 Fault indicator for use with load-break connector
10/08/1998DE19712535A1 Effective value measurement of digital signals e.g. for AGC
10/07/1998EP0869368A2 Method and apparatus for digital sampling of electrical waveform
10/07/1998CN1195108A Phase difference type magnetic modulating dc current measuring circuit and detecting method thereof
10/06/1998US5819204 Apparatus and method for power disturbance analysis and selective disturbance storage deletion based on quality factor
10/06/1998US5819203 Apparatus and method for power disturbance analysis and storage
10/06/1998US5818781 For use in a computer system
10/06/1998US5818267 Input detector
10/06/1998US5818243 Meter for measuring a current
10/06/1998US5818238 Apparatus for measuring current and other parameters of an electornic device in response to an applied voltage
10/01/1998WO1998043100A2 Current and voltage sensing
10/01/1998DE19729464C1 Circuit for output stage for analogue electric variables I & V as proportional voltage
10/01/1998DE19726998C1 Digital signal processing for determining electric characteristic quantity or magnitude in AC networks
09/1998
09/30/1998EP0867743A2 Optical fiber modulator having an optical fiber having poled portion serving as an electrooptic element and method for making same
09/30/1998EP0866975A1 Electro-optic voltage sensor
09/30/1998CN1194379A Short circuit detector
09/29/1998US5815357 Device for monitoring a polyphase system connected to a load
09/29/1998US5815027 Circuit configuration for detecting a load current of a power semiconductor component with a source-side load
09/29/1998US5814997 Single-pole voltage detector, in particular for overhead electrical lines
09/29/1998US5814994 Of an internal combustion engine
09/24/1998WO1998042074A1 Evaluation of a pulse-width modulation signal
09/24/1998DE19744651A1 Test device for measuring supply current of semiconductor device
09/24/1998DE19716477A1 Verfahren und Einrichtung zur Messung einer elektrischen Spannung Method and device for measuring an electric voltage
09/24/1998DE19711990A1 Hochspannungsanlage mit einer Vorrichtung zur Übertragung von Signalen High-voltage system having a device for transmitting signals
09/24/1998DE19710742A1 Summation current transformer arrangement e.g. for fault-current and difference current circuit-breakers
09/24/1998DE19709594A1 Determining load on electric induction motor
09/23/1998EP0866557A1 Solid state relay
09/23/1998EP0866556A1 Short circuit protection circuit
09/23/1998EP0866339A1 Method and circuit to regulate a motor
09/22/1998US5811964 Method and device for measuring an electrical alternating quanity with temperature compensation
09/22/1998US5811809 Nuclear event detector and threshold detector circuit therefor
09/19/1998CA2231219A1 Short circuit protection circuit
09/17/1998WO1998040753A2 High voltage installation with a device for transmitting signals
09/17/1998DE19710558A1 Auswertung eines Puls-Weiten-Modulations-Signals Evaluation of a pulse-width modulation signal
09/17/1998DE19710298A1 System for measuring current in coil, especially in transformer or storage inductance
09/16/1998EP0864889A2 Automatic current selection for single fiber splicing
09/16/1998CN1193386A Shunt assembly for current measurement
09/16/1998CN1193114A On-line detection method for function of operational amplifier
09/16/1998CN1193113A AC. current value linear signal sensor
09/15/1998US5809045 Method of detecting faults on a power transmission line system
09/15/1998US5808462 Apparatus for detecting the amplitude and phase of an a.c. signal
09/15/1998US5808415 Apparatus for sensing RF current delivered to a plasma with two inductive loops
09/11/1998WO1998039662A1 Method and device for measuring an electrical voltage
09/09/1998EP0863611A1 A short-circuit detecting device
09/09/1998EP0863596A1 Apparatus for waveform disturbance monitoring for an electric power system
09/09/1998EP0862744A1 Concatenated magneto-optic field sensors
09/08/1998US5804995 Monitoring circuit for a supply voltage
09/08/1998US5804993 Detecting circuit
09/08/1998US5804979 In a conductor
09/08/1998US5804894 Low voltage battery pack monitoring circuit with adjustable set points
09/04/1998CA2230735A1 Apparatus for waveform disturbance monitoring for an electric power system
09/02/1998EP0862060A2 RMS converter using digital filtering
09/02/1998EP0861523A1 Cmos comparator
09/02/1998EP0861514A1 Jamming detection device for electrical drives
09/02/1998EP0861468A1 Automatic voltage detection in multiple voltage applications
09/02/1998EP0861442A2 Current measurement in turbogenerators
09/02/1998EP0645060B1 Device for signal shaping and for reference mark recognition
09/01/1998US5801952 Apparatus and method for power disturbance analysis and storage of unique impulses
09/01/1998US5801552 Voltage detector circuit
08/1998
08/26/1998EP0859961A1 Current sensor assemblies
08/25/1998US5798933 High precision relative digital voltage measurement
08/25/1998US5798725 Comparator for an analog to digital converter
08/20/1998WO1998036283A1 Current sensor with self-oscillating generator circuit
08/20/1998WO1998036282A1 Current detector working in accordance with the compensation principle
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