| 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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| 11/16/2010 | US7834664 Semiconductor device for detecting a phase of a clock |
| 11/10/2010 | CN101881793A Alternating current power failure detection method and warning circuit |
| 11/03/2010 | CN101877479A Method for comparing and judging phase of single-pole adaptive reclosure of electric transmission line |
| 11/03/2010 | CN101551640B PMU synchronized clock system added by dynamic compensation |
| 11/03/2010 | CN101551419B Method and system for detecting phase noise |
| 11/02/2010 | US7825649 Specific phase position detection |
| 10/27/2010 | CN101871971A Method for measuring frequency-phase characteristic of electrical network |
| 10/27/2010 | CN101871965A Method for detecting zero crossing time, frequency and phase difference of power sinusoidal signals |
| 10/26/2010 | US7821250 RF sensor clamp assembly |
| 10/21/2010 | US20100264903 Method and apparatus for determining peak phase error between clock signals |
| 10/20/2010 | CN201611380U 数字式频率特性测试仪 Digital frequency characteristics tester |
| 10/20/2010 | CN101865963A New quick detection method for relay protective device |
| 10/20/2010 | CN101865952A Method for realizing high-precision synchronous phasor measurement |
| 10/19/2010 | US7816927 Method and system for real time identification of voltage stability via identification of weakest lines and buses contributing to power system collapse |
| 10/19/2010 | US7816903 Single-phase 3-wire power line connection determination apparatus and connection determination method |
| 10/14/2010 | US20100262395 System and Method for Determining a Phase Conductor Supplying Power to a Device |
| 10/14/2010 | US20100262393 System and Method for Determining a Phase Conductor Supplying Power to a Device |
| 10/13/2010 | CN201608686U 一种变频器检测电机剩磁硬件电路 One kind of hardware circuit inverter detects motor remanence |
| 10/13/2010 | CN201607487U 高压电相位无线核定仪 Wireless high-voltage phase of the approved instrument |
| 10/13/2010 | CN201607486U 数字式频率特性测试仪 Digital frequency characteristics tester |
| 10/13/2010 | CN1997900B Method and device for detecting the wiring phase of an arbitrary unknown phase voltage relative to a reference phase voltage |
| 10/13/2010 | CN101043277B Pulse synchronized method and unit in receptivity test of mobile communication terminal |
| 10/12/2010 | US7812644 Digital frequency detector and digital phase locked loop using the digital frequency detector |
| 10/07/2010 | US20100253406 Apparatus and method for compensating for process, voltage, and temperature variation of the time delay of a digital delay line |
| 10/06/2010 | CN101854063A Device and method for detecting power phase in energy feedback device |
| 10/06/2010 | CN101852830A Jitter measuring apparatus |
| 10/05/2010 | US7808228 Long range phasing voltmeter |
| 09/23/2010 | US20100237852 Method for Determining the Phases in a Multi-Phase Electrical System and Device for The Implementation Thereof |
| 09/22/2010 | CN201589820U Simple and easy detection equipment for measuring three-phase alternating current phase sequence |
| 09/15/2010 | CN201583603U Switch cabinet electricity testing lightning arrester on-line monitoring device |
| 09/15/2010 | CN201583602U Low-voltage phase sequence phase meter |
| 09/15/2010 | CN201583601U High-low voltage comprehensive phase sequence and phase position instrument |
| 09/15/2010 | CN101833055A Method and system for testing low pressure increase of converter valve equipment |
| 09/15/2010 | CN101833051A Electrified tester for zinc oxide arrester |
| 09/15/2010 | CN101833037A Device and method for detecting input voltage phase of power unit of high voltage frequency converter |
| 09/15/2010 | CN101833036A Method for measuring instantaneous phase of alternating current |
| 09/15/2010 | CN101271134B Test method of electric power line voltage phase angle |
| 09/14/2010 | US7795926 Phase detector for half-rate bang-bang CDR circuit |
| 09/14/2010 | US7795925 Phase difference detector and phase difference detection method |
| 09/08/2010 | CN101825677A Fault phase selection method of four loop transmission lines on same tower based on phase-angle difference of circulation flow current |
| 09/07/2010 | US7792646 Measuring arrangement for registering chemical and/or physical, measured variables, as well as measuring device therefor |
| 09/02/2010 | WO2010098460A1 Phase determining device and frequency determining device |
| 09/01/2010 | CN201569702U Digital voltmeter |
| 09/01/2010 | CN201569691U Electric power quality monitoring and synchronous phasor monitoring device of power system |
| 09/01/2010 | CN1849517B Method and apparatus for measuring active, reactive power of system and module, impedance of electrical component |
| 08/31/2010 | US7786718 Time measurement of periodic signals |
| 08/26/2010 | US20100213925 Advanced real-time grid monitoring system and method |
| 08/25/2010 | CN101813725A Method for measuring phase difference of low-frequency signals |
| 08/12/2010 | US20100201402 Phase Error De-Glitching Circuit and Method of Operating |
| 08/12/2010 | US20100201350 Device for the detection quadrature signals |
| 08/12/2010 | US20100201343 Programable delay module testing device and methods thereof |
| 08/11/2010 | CN101799492A Arrester wireless on-line monitoring device |
| 08/10/2010 | US7772827 Measuring device, in particular, a vectorial network analyzer with phase regulation |
| 08/04/2010 | CN201540350U Hyper-high-frequency signal receiving device for detecting local discharge |
| 08/04/2010 | CN201540349U Ultra-high frequency signal sensor for partial discharge detection |
| 08/04/2010 | CN201540339U Capacitor inductor automatic tester |
| 08/04/2010 | CN101795078A Ultrasonic power driving power supply with novel topological structure |
| 07/28/2010 | CN201535802U 电动车无刷电机控制器相角、相序测定仪 Electric car brushless motor controller phase angle, phase sequence analyzer |
| 07/28/2010 | CN101789601A Real time digital system (RTDS) phase-locking synchronous element |
| 07/28/2010 | CN101788614A High and low voltage integrated phase-sequence phase meter and detection method thereof |
| 07/28/2010 | CN101788607A Low-voltage phase-sequence phasemeter and detection method thereof |
| 07/27/2010 | US7764759 Linear sample and hold phase detector for clocking circuits |
| 07/22/2010 | WO2010081725A2 Method and network analyser for measuring group runtime in a measuring object |
| 07/22/2010 | US20100182049 Digital Phase Detection |
| 07/20/2010 | US7761249 Utility meter having RF protection |
| 07/15/2010 | US20100176959 Air conditioner and reverse phase detection method thereof |
| 07/14/2010 | EP2207044A1 A signal phase difference measurement method, apparatus and system |
| 07/14/2010 | CN201527454U Semi-closed central-positioned nuclear phase handcart |
| 07/14/2010 | CN101776712A Phasing tester |
| 07/13/2010 | US7755397 Methods and apparatus for digital phase detection with improved frequency locking |
| 07/08/2010 | WO2010041163A3 Phase frequency to digital converter |
| 07/07/2010 | CN101769980A Testing method simulating power transmission debugging |
| 07/01/2010 | US20100164473 Meter phase identification |
| 06/30/2010 | CN101762768A Method for analyzing autotransformer differential protection CT circuit connection |
| 06/30/2010 | CN101762742A Sampling value correcting method based on fixed-frequency sampling sequence |
| 06/29/2010 | US7747400 VA metering in polyphase systems |
| 06/24/2010 | DE102004019142B4 Signal-Vervielfacher, insbesondere Signalverdoppler für Messsignale Signal multiplier particular signal duplicator for measuring signals |
| 06/23/2010 | CN101750562A Non-PMU measure point dynamic process estimation method based on flow equation sensitiveness analysis |
| 06/17/2010 | US20100153042 Measurement apparatus and program |
| 06/16/2010 | CN1764986B Circuit for use in frequency or phase detector |
| 06/16/2010 | CN101733540A Method for acquiring values of trigger angle and extinguishing angle in real time in alternating current resistor spot welding |
| 06/15/2010 | US7739098 System and method for providing distributed static timing analysis with merged results |
| 06/09/2010 | CN101726665A Three-phase potential detecting method of low-voltage carrier wave power line for communication |
| 06/09/2010 | CN101726664A Method, device and system for measuring signal phase difference |
| 06/03/2010 | US20100134092 Phase-difference-corresponding-value measurement device, gain imbalance measurement device, method, program, and recording medium |
| 06/02/2010 | CN201497776U Device for realizing power measurement based on resistance sampling by adopting linear photoelectric coupler |
| 06/02/2010 | CN101718817A Device and method for measuring voltage phase of high-voltage line in field intensity type non-contact way |
| 06/02/2010 | CN101718814A Method for measuring and calculating electrical quantities of safety and stability control device based on FPGA |
| 06/01/2010 | US7728576 Programmable multi-channel amplitude and phase shifting circuit |
| 05/19/2010 | CN201477157U Phase difference detecting and measuring device |
| 05/19/2010 | CN201477145U Monitoring system for power quality |
| 05/19/2010 | CN101710156A Power utilization quality detection circuit and detection method thereof |
| 05/12/2010 | CN201464575U Portable comprehensive test instrument for capacitor |
| 05/12/2010 | CN201464559U Voltage phase-angle measurement device for 25Hz track of railway |
| 05/12/2010 | CN201464558U Power supply phase detection device in energy feedback device |
| 05/12/2010 | CN1948980B Remote short circuit multi-phase detecting method and detecting device thereof |
| 05/06/2010 | WO2010048817A1 A signal phase difference measurement method, apparatus and system |
| 05/05/2010 | CN101701992A Electrified tester of digital wireless type zinc oxide arrester |
| 05/05/2010 | CN101701988A Integrated portable multichannel phase coherent signal analyzer |
| 05/05/2010 | CN101701987A Method for analyzing and recognizing phase of cable and device thereof |