| Patents for G01R 25 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents (2,594) |
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| 03/12/2014 | CN103630765A Digitized intelligent phasing instrument device |
| 03/12/2014 | CN103630744A PMU phase angle detection method and system |
| 03/12/2014 | CN102590613B Method and device for measuring arrival time difference of radio-frequency signal |
| 03/12/2014 | CN102520246B Constant frequency phasor extraction method |
| 03/12/2014 | CN102157914B Half-wave rapid detection method for relay protection device |
| 03/11/2014 | US8669786 Clock phase shift detector |
| 03/06/2014 | US20140062457 Three-phase ac phase sequence detecting method and apparatus |
| 03/06/2014 | US20140062456 Identifying multi-phase devices in a time trace disaggregation process |
| 03/05/2014 | CN101923126B Automatic closed loop test method |
| 02/26/2014 | CN103604992A Wireless nuclear phase on-load correction protection method and system for secondary circuit of substation |
| 02/26/2014 | CN103604991A Device and method for measuring bus voltage phase of capacitor voltage transformer |
| 02/25/2014 | US8660848 Methods and systems for detection from and analysis of physical signals |
| 02/20/2014 | DE102012107446A1 Lastumschalter, Laststufenschalter und Verfahren zum Umschalten eines Laststufenschalters Load switch, load tap changer and method for switching a load tap changer |
| 02/19/2014 | EP2698920A1 Phase-locked loop |
| 02/19/2014 | CN103592515A Universal phase identifier |
| 02/19/2014 | CN103592511A Circuit for detecting alternating current power supply frequency |
| 02/19/2014 | CN103592500A Power grid synchronous signal real-time detection method and system based on reference frequency |
| 02/13/2014 | US20140043014 Phase-locked loop |
| 02/12/2014 | CN103575993A Sampled data processing method combining PMU dynamic data processing |
| 02/12/2014 | CN103575992A Alternating-current parameter measuring device |
| 02/12/2014 | CN103575991A Method for accurately measuring instantaneous phase of alternating current |
| 02/12/2014 | CN103575990A Method for digital measuring of instantaneous phase of alternating current |
| 02/12/2014 | CN103575989A Method for accurately measuring phase differences of alternating current |
| 02/12/2014 | CN103575988A Method for measuring phase difference of alternating current in digital mode |
| 02/12/2014 | CN103575980A System frequency measurement method and synchronous phasor measurement method and device |
| 02/12/2014 | CN103575956A Detection circuit and detection method |
| 02/12/2014 | CN102346211B Alternating-current (AC) real current detection apparatus and detection method thereof |
| 02/05/2014 | CN103558641A Well logging detector |
| 02/05/2014 | CN103558456A Method, system and device for testing magnetic pole code of permanent magnetic synchronous tractor |
| 02/05/2014 | CN103558455A Novel energized arrester tester and arrester detection method |
| 02/05/2014 | CN102197598B System and method for precision phase shift measurement |
| 01/29/2014 | CN103543335A Method for measuring synchronous phasor |
| 01/29/2014 | CN103543334A Phase difference measurement device and method based on FFT |
| 01/29/2014 | CN103543333A High-frequency signal phase difference measurement method and device |
| 01/28/2014 | US8638124 Clock phase shift detector |
| 01/28/2014 | US8638088 Load detection for switched-mode power converters |
| 01/22/2014 | CN103529296A Device and method for measuring phase spectrum of comb-shaped spectrum generator |
| 01/21/2014 | US8633033 Volumetric induction phase shift detection system for determining tissue water content properties |
| 01/15/2014 | CN203396937U Voltage-transformer secondary voltage detection system applied in power field |
| 01/15/2014 | CN203396841U Phase locking apparatus of a variable-ratio water-drawing energy-storage set control system |
| 01/15/2014 | CN103513105A 220V synchronous phasor measurement device on user side |
| 01/15/2014 | CN103513104A Dimming angle sensing circuit, dimming angle sensing method, and power supply device comprising the dimming angle sensing circuit |
| 01/08/2014 | EP2682767A2 Phase shifter with a reduced influence of errors |
| 01/08/2014 | CN203385789U Phase acquisition circuit for small-character ink jet printer |
| 01/08/2014 | CN103499780A Measurement method and device for phase angle during partial discharge of GIS (Gas Insulated Switchgear) |
| 01/08/2014 | CN103499742A Method for reducing influence on high-precision phase measurement due to signal amplitude change |
| 01/08/2014 | CN102590619B Method for detecting time synchronization capacity of real-time measurement equipment based on timing variable |
| 01/08/2014 | CN102466765B Power supply inverter and power supply phase detection circuit thereof |
| 01/08/2014 | CN102435848B Comparison device for verifying capacity of phase noise in Ka wave band |
| 01/08/2014 | CN102288821B Measuring method, measuring device, measuring procedure and carrier for phase difference of three-phase circuit |
| 01/08/2014 | CN102236069B Test system and test method |
| 01/07/2014 | US8626462 Phase identification system and method |
| 01/07/2014 | US8624629 Phase difference quantization circuit |
| 01/07/2014 | US8624578 Branch current monitor with configuration |
| 01/02/2014 | US20140002056 Systems and methods for measuring the frequency of signals generated by high frequency medical devices |
| 01/02/2014 | US20140001886 System and method to perform automatic phase reversal detection |
| 01/01/2014 | EP2680016A2 Systems and methods for measuring the frequency of signals generated by high frequency medical devices |
| 01/01/2014 | EP2678696A1 Machine systems including pre-power diagnostics |
| 01/01/2014 | CN203376393U Power angle measurement data acquisition card |
| 01/01/2014 | CN203376392U Relay protection on-load inspection intelligent phasor analysis meter |
| 01/01/2014 | CN103487650A Frequency measurement device of hydroelectric generating set |
| 01/01/2014 | CN102301247B Method for recognizing AC voltage phase, power module and power supply system |
| 12/29/2013 | CA2816774A1 Systems and methods for measuring the frequency of signals generated by high frequency medical devices |
| 12/27/2013 | WO2013189242A1 Protective circuit for high frequency heating device and high frequency heating device having same |
| 12/27/2013 | CA2875336A1 Electric power system waveform search |
| 12/25/2013 | CN103472302A Method for using one-phase photovoltaic grid-connected inverter to detect network voltage phase |
| 12/25/2013 | CN103472301A Method and system for extracting positive sequence component and negative sequence component of network voltage |
| 12/25/2013 | CN102195496B Phase angle measurement of dimming circuit for switching power supply |
| 12/18/2013 | CN203350361U Phase calibrating device for testing bench of electronic control monoblock pump |
| 12/18/2013 | CN103454553A Secondary side phase checking device of voltage transformer |
| 12/18/2013 | CN103454497A Phase difference measuring method based on improved windowing discrete Fourier transform |
| 12/18/2013 | CN103454496A Method for knock detection |
| 12/11/2013 | CN203332152U Protection box for railroad phase-sensitive track circuit |
| 12/11/2013 | CN102621382B Method for detecting frequency, phase and amplitude of electric signal in electric power system |
| 12/10/2013 | US8606429 System and method for controlling an electronic device fan |
| 12/10/2013 | US8604840 Frequency synthesizer noise reduction |
| 12/10/2013 | US8604835 Semiconductor apparatus |
| 12/10/2013 | US8604773 Receiving apparatus, test apparatus, receiving method, and test method |
| 12/05/2013 | US20130325376 Systems and methods for determining a power phase and/or a phase rotation |
| 12/05/2013 | US20130320959 Power Device Analyzer |
| 12/05/2013 | US20130320852 Phase difference detector, phase difference detection program, and plasma processing system using the phase difference detector |
| 12/03/2013 | US8600687 Signal analyzer for analyzing dynamic behavior of a target system |
| 12/03/2013 | US8598496 Method for testing the operation of a heating element used for an activated carbon filter |
| 11/28/2013 | US20130314072 Polarity detection circuit |
| 11/27/2013 | CN203310918U Phase detector based on micromechanical indirect thermoelectric power sensor |
| 11/27/2013 | CN203310917U TDC-based intelligent phase comparing device |
| 11/27/2013 | CN203310916U Phase detector based on micromechanical cantilever capacitive power sensor |
| 11/27/2013 | CN203310915U Phase detector based on micro mechanical direct thermoelectric power sensor |
| 11/27/2013 | CN203310914U Low frequency antenna array phase measurement apparatus based on GPS and phase detection chip |
| 11/27/2013 | CN102435844B Sinusoidal signal phasor calculating method being independent of frequency |
| 11/27/2013 | CN101852830B Jitter measuring apparatus |
| 11/20/2013 | CN203299274U High tension switchgear phase measurement circuit |
| 11/20/2013 | CN203299273U Phase-checking instrument of transformer |
| 11/20/2013 | CN103403562A Machine systems including pre-power diagnostics |
| 11/20/2013 | CN103399207A Secondary voltage phase checking device and phase checking system |
| 11/20/2013 | CN103399203A High-precision harmonic parameter estimation method based on composite iterative algorithm |
| 11/20/2013 | CN103399202A Phase locking method for control system of variable-speed pump storage group |
| 11/19/2013 | US8587290 Method, system and device of phase identification using a smart meter |
| 11/19/2013 | US8587289 Method for determining the offset of a periodic signal |
| 11/14/2013 | US20130304407 Channel integrity detection |