| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 06/03/2009 | CN101446601A Method for determining a voltage level across an electric circuit of a powertrain |
| 06/03/2009 | CN101446600A Optical fiber current sensing device used for monitoring subway stray current |
| 06/02/2009 | US7541799 Method and device for measuring a current flowing in an electrical conductor |
| 06/02/2009 | US7541798 Semiconductor test apparatus and performance board |
| 06/02/2009 | US7541773 Battery-powered tool capable of detecting discharged battery pack |
| 05/28/2009 | WO2009067271A1 Voltage source measurement unit with minimized common mode errors |
| 05/28/2009 | WO2009065837A1 Analog input module for automatism equipment |
| 05/28/2009 | WO2009065294A1 Auto-metering unit for power distribution transformer |
| 05/28/2009 | US20090138221 Magnetic winding and method of making same |
| 05/28/2009 | US20090134913 Signal comparison circuit |
| 05/28/2009 | US20090134856 Method of optimum current blanking time implementation in current sense circuit |
| 05/28/2009 | US20090133743 Method of manufacturing electrode substrate, electrode substrate, photoelectric conversion element, and dye-sensitized solar cell |
| 05/28/2009 | DE102008051414A1 Strommessung mit geschalteten Kondensatoren Current measurement with switched capacitors |
| 05/27/2009 | EP2063279A1 Voltage detecting device for battery modules |
| 05/27/2009 | EP1949114B1 Method for measuring a motor current |
| 05/27/2009 | EP1886153A4 Bi-directional mos current sense circuit |
| 05/27/2009 | CN201248035Y Receiver capable of linear indication of strong and weak electrical levels |
| 05/27/2009 | CN201247969Y Charger |
| 05/27/2009 | CN201247562Y Electronic photo frame capable of indicating battery electric quantity through LED |
| 05/27/2009 | CN201247401Y Apparatus for collecting and processing signal of subway stray current optical fiber sensing system |
| 05/27/2009 | CN201247303Y Current sensor for on-line monitoring cable local discharge |
| 05/27/2009 | CN201247300Y Non-contact DC/AC leakage current tester |
| 05/27/2009 | CN201247298Y Automatic recognizing instrument for relay protection differential vector |
| 05/27/2009 | CN201247294Y Synthesis on-line automatization monitoring system for transformer substation |
| 05/27/2009 | CN201247282Y Multifunctional test pencil |
| 05/27/2009 | CN201247281Y Electrified detector for simple metal object |
| 05/27/2009 | CN201247280Y Automatic friction electrostatic voltage tester |
| 05/27/2009 | CN201247279Y Device for measuring grounding voltage of power distribution network overhead line |
| 05/27/2009 | CN201247278Y On-line monitoring device for grounding current of transformer iron core |
| 05/27/2009 | CN201247277Y Converting device for measuring current, voltage and power parameter |
| 05/27/2009 | CN201247276Y Intelligent power utilization metering monitoring instrument |
| 05/27/2009 | CN201247275Y Dc potential difference meter employing slide wire disk |
| 05/27/2009 | CN201247274Y Potential difference meter employing slide wire disk |
| 05/27/2009 | CN201247150Y Portable test device for governor of hydraulic turbine |
| 05/27/2009 | CN101442218A Electric power system relay protection and two-way power supply method for control equipment |
| 05/27/2009 | CN101441251A Battery charge/discharge current detection apparatus |
| 05/27/2009 | CN101441230A Method and apparatus for implementing voltage detection |
| 05/27/2009 | CN101441229A Electrifying information measuring device |
| 05/27/2009 | CN100492895C Feedback control system and method |
| 05/27/2009 | CN100492797C Waveform sine principle based transformer excitation flow recognition method |
| 05/27/2009 | CN100492025C Optical current sensor based on microelectronic mechanical system, making and detecting method thereof |
| 05/27/2009 | CN100492023C An eddy-current screen filter and its design method |
| 05/27/2009 | CN100492022C An air pressure filter, its design method and application |
| 05/26/2009 | US7538584 Sense amplifier |
| 05/26/2009 | CA2280378C Arrangements to detect and respond to disturbances in electrical power systems |
| 05/22/2009 | WO2009064440A2 Three-phase detection module |
| 05/21/2009 | US20090132188 Battery charge/discharge current detection apparatus |
| 05/21/2009 | US20090132187 Systems and methods for analysis and design of radiating and scattering objects |
| 05/21/2009 | US20090128132 Current measurement |
| 05/21/2009 | US20090128131 Detector |
| 05/21/2009 | US20090128129 Current sensor having magnetic gap |
| 05/21/2009 | US20090128122 Apparatus for measuring the electrical energy delivered to a rail traction unit by a high voltage line |
| 05/20/2009 | EP2060748A1 Device for detecting a breakage in a turbomachine shaft |
| 05/20/2009 | EP2059823A2 Sensor, method and system of monitoring transmission lines |
| 05/20/2009 | EP1099119B1 Signalling system |
| 05/20/2009 | DE102007054395A1 Anordnung zur Messung eines elektrischen Stromes Arrangement for measuring an electric current |
| 05/20/2009 | CN201242565Y 多功能组合验电器 Multifunction electroscope |
| 05/20/2009 | CN201242564Y Apparatus for detecting operating parameter of vibration mechanical electric appliance |
| 05/20/2009 | CN201242563Y Thunderbolt transient impact current sensor |
| 05/20/2009 | CN201242562Y Circuit for transferring same current into voltage of linear space and logarithm space |
| 05/20/2009 | CN201242561Y Apparatus for detecting power supply current |
| 05/20/2009 | CN201242560Y Device for testing edge voltage value |
| 05/20/2009 | CN201239720Y Automatic battery detecting and sorting apparatus |
| 05/20/2009 | CN101438174A Input by-pass circuit for a current probe |
| 05/20/2009 | CN101436356A Apparatus and method for measuring gyro moment |
| 05/20/2009 | CN101435844A Fan failure detection circuit and detection method thereof |
| 05/20/2009 | CN101435834A Modular assembled electrical energy meter |
| 05/20/2009 | CN100490553C Mobile terminal standing detection method, circuit and apparatus thereof |
| 05/20/2009 | CN100489555C Universal electric power mutual-inductor verification device |
| 05/20/2009 | CN100489542C Electric current tester |
| 05/20/2009 | CN100489400C Gas appliance circuit capable of automatically prompting for power shortage |
| 05/19/2009 | US7535292 Optimized uplink efficiencies for transmission of satellite data |
| 05/19/2009 | US7535263 Comparator feedback peak detector |
| 05/19/2009 | US7535262 High voltage level shifting by capacitive coupling |
| 05/19/2009 | CA2548593C Fluid detection apparatus and kit, and method of installation thereof |
| 05/14/2009 | WO2009060361A2 Current integrator with wide dynamic range |
| 05/14/2009 | US20090125257 Compressor sensor module |
| 05/14/2009 | US20090125255 Methods and apparatus for measuring voltage and voltage phase angle on bpl line |
| 05/14/2009 | US20090121739 Ac detecting apparatus for detecting operating states of ac power supply |
| 05/14/2009 | US20090121726 Test apparatus and measurement apparatus |
| 05/14/2009 | US20090121723 Electrostatic discharge device testing system and method |
| 05/14/2009 | US20090121703 Load current sensing technique |
| 05/14/2009 | DE102007052963A1 Verfahren zur Kurzschlusserkennung in einem elektrischen Stromnetz A method for short-circuit detection in an electrical network |
| 05/13/2009 | EP2058936A1 Current control type power conversion device |
| 05/13/2009 | EP2058832A2 Circuit breaker, trip assembly, bimetal compensation circuit and method including compensation for bimetal temperature coefficient |
| 05/13/2009 | CN201238118Y Energy-saving apparatus for electric appliance stand-by |
| 05/13/2009 | CN201237747Y Wire harness type electric current controller |
| 05/13/2009 | CN201237635Y Battery voltage detector and mobile terminal with the same |
| 05/13/2009 | CN201237622Y On-line monitoring device for three-phase arrester in cabinet |
| 05/13/2009 | CN201237619Y Combined voltage test pencil |
| 05/13/2009 | CN201237618Y Phase voltage detection circuit for three-phase three-wire system electric network |
| 05/13/2009 | CN201237615Y Sensor for high-voltage live display device |
| 05/13/2009 | CN101432631A Bi-directional current sensing by monitoring VS voltage in a half or full bridge circuit |
| 05/13/2009 | CN101431708A Terminal and method for recognizing headphone type |
| 05/13/2009 | CN101431298A Switching arrangement for operating electrical load, and having load current measurement function |
| 05/13/2009 | CN101431212A Abnormality detection method for gas laser oscillator and gas laser oscillator for implementing the method |
| 05/13/2009 | CN101430367A Multi-cell voltage secure data encoding in hybrid vehicles |
| 05/13/2009 | CN101430360A Error data identification method for secondary equipment in electric power supply system |
| 05/13/2009 | CN101430349A Novel method for measuring resistive current of gapless metal-oxide lighting arrester |
| 05/13/2009 | CN101430348A State detection apparatus and state detection method |