| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 04/19/2011 | US7930117 Systems and methods for power swing and out-of-step detection using time stamped data |
| 04/19/2011 | US7928720 Power conversion efficiency measurement system and method |
| 04/19/2011 | US7928719 Zero current detector for a DC-DC converter |
| 04/14/2011 | WO2011043570A2 Method and apparatus for measuring the residual capacity of a lithium primary battery |
| 04/14/2011 | WO2011043311A1 Battery voltage measurement device |
| 04/14/2011 | WO2011042134A2 Method and device for determining an input voltage on a local network station of a power network |
| 04/14/2011 | US20110084690 Apparatus for measuring rf voltage from a quadrupole in a mass spectrometer |
| 04/14/2011 | US20110084689 Circuit, system and/or method for detecting an electrical connection between an electrical device and a power supply |
| 04/14/2011 | US20110084685 Power Saving for Hot Plug Detect |
| 04/14/2011 | DE202010016782U1 Spannungsanzeigevorrichtung Voltage display device |
| 04/14/2011 | DE102009048509A1 Verfahren und Vorrichtung zur Ermittlung einer Eingangsspannung an einer Ortsnetzstation eines Stromnetzes Method and apparatus for determining an input voltage at a local substation of a power network |
| 04/14/2011 | DE102005001180B4 Einpoliger Spannungsdetektor, insbesondere für oberirdische elektrische Leitung Single-pole voltage detector, in particular for overhead electrical line |
| 04/13/2011 | CN201797449U 直流电源供应器 DC Power Supply |
| 04/13/2011 | CN201797295U 剩余电流保护器 Residual current protective devices |
| 04/13/2011 | CN201797017U Storage battery protector |
| 04/13/2011 | CN201796127U Device for carrying out activation test of lithium battery |
| 04/13/2011 | CN201796108U Single-phase grounding fault positioning system for distribution network of electric power system |
| 04/13/2011 | CN201796102U Device for monitoring electric leakage of electric apparatus |
| 04/13/2011 | CN201796094U Return-to-zero instrument for counter of lightning arrester |
| 04/13/2011 | CN201796092U Online monitoring device for cable sheath ring current of 110kV and above |
| 04/13/2011 | CN201796084U Wireless electric quantity sensor |
| 04/13/2011 | CN201796083U Digital voltmeter |
| 04/13/2011 | CN201796082U Intelligent device for measuring current, voltage and power |
| 04/13/2011 | CN201796081U Operating cycles counter for over voltage protector |
| 04/13/2011 | CN201796080U 试电笔 Test pencil |
| 04/13/2011 | CN201796079U Novel high-voltage charged display locking device |
| 04/13/2011 | CN201796078U Laser bias current monitoring circuit with APC |
| 04/13/2011 | CN201796077U Laser device bias current monitoring circuit with APC (automatic phase control) function |
| 04/13/2011 | CN201796076U Superconductive strand critical current test sample holder |
| 04/13/2011 | CN201796075U Coil framework suit for current sensor |
| 04/13/2011 | CN1991949B Light emitting device |
| 04/13/2011 | CN102017380A Current detecting circuit and transformer current measuring system |
| 04/13/2011 | CN102017351A Fault detection for battery chargers |
| 04/13/2011 | CN102016609A Apparatus and method for active voltage compensation |
| 04/13/2011 | CN102016607A Method and apparatus for analyzing waveform signals of a power system |
| 04/13/2011 | CN102014558A LED load detection and power supply control circuit |
| 04/13/2011 | CN102014017A Signal detection circuit, method and system |
| 04/13/2011 | CN102013343A Integrated-type operator |
| 04/13/2011 | CN102013311A Pressure type current transformer |
| 04/13/2011 | CN102013225A High-speed and high-precision control proposal and control circuit for LED (light emitting diode) brightness and color |
| 04/13/2011 | CN102013197A Tester for detecting conductivity of object |
| 04/13/2011 | CN102012487A Charging detection method and detector of battery |
| 04/13/2011 | CN102012486A Voltage measuring tool special for storage battery |
| 04/13/2011 | CN102012485A Method for fast detecting cycle life of lead-acid accumulator |
| 04/13/2011 | CN102012471A Frequency converter output earth short circuit detection method and device |
| 04/13/2011 | CN102012467A Discrimination system for breakdown failures on mainline or branch line of power grid |
| 04/13/2011 | CN102012455A Zero-crossing detection circuit |
| 04/13/2011 | CN102012454A Zero passage detection method and device of counter electromotive force of permanent magnet direct current brushless Hall motor |
| 04/13/2011 | CN102012453A Current detection circuit |
| 04/13/2011 | CN102012452A Method, device and circuit for detecting alternating voltage |
| 04/13/2011 | CN102012451A Light-emitting diode-based insulator leakage current fiber sensor system |
| 04/13/2011 | CN102012450A Novel secondary pressure drop tester |
| 04/13/2011 | CN102012449A Wireless on-line monitoring system for zinc oxide lightning arrester of electric transmission line |
| 04/13/2011 | CN102012448A Rogowski current sensor |
| 04/13/2011 | CN102012447A Telescopic clip-on ammeter |
| 04/13/2011 | CN102012446A Current sensor, current measuring module and method for measuring current |
| 04/13/2011 | CN102012245A State detection device |
| 04/13/2011 | CN101650480B Method and device for analyzing iron concentration in liquid crystal panel |
| 04/13/2011 | CN101504436B Semi-wave DC detection method |
| 04/13/2011 | CN101430360B Error data identification method for secondary equipment in electric power supply system |
| 04/12/2011 | US7925459 Method and apparatus for determining an operating voltage for preventing photovoltaic cell reverse breakdown during power conversion |
| 04/12/2011 | US7923984 Universal, wireless, nano-optical voltmeters |
| 04/12/2011 | US7923983 Method and apparatus for measuring AC voltages |
| 04/12/2011 | CA2307240C Matchline sense circuit and method |
| 04/07/2011 | WO2011040411A1 Voltage monitoring apparatus |
| 04/07/2011 | US20110080197 Apparatus and methods for power quality measurement |
| 04/07/2011 | US20110080177 Ground fault circuit interrupter and method |
| 04/07/2011 | US20110080113 System and method for output flux measurement of a light emitting diode |
| 04/07/2011 | DE202009015870U1 Vorrichtung zur Ermittlung eines Zustands einer Elektrozaunanlage Means for determining a state of an electric fence |
| 04/07/2011 | DE102010037236A1 Vorrichtung zum Messen von elektrischem Strom mit erhöhter Festigkeit für den Einbau An apparatus for measuring electrical current with increased strength for the installation |
| 04/07/2011 | DE102009048174A1 Method for controlling threshold value of battery voltage of battery of e.g. hybrid vehicle, involves setting threshold value of battery voltage to actual battery voltage when cell voltage exceeds or falls below cell voltage threshold |
| 04/07/2011 | DE102009045310A1 Current measuring arrangement for use in current circuit of battery of motor vehicle, has shunts fixed between supply elements such that heat capacity of shunts and/or adjacent areas of elements serve as cooling body for power components |
| 04/07/2011 | DE102009044915A1 Ladevorrichtung zum Aufladen eines Akkupacks Charger for charging a battery pack |
| 04/07/2011 | DE102006044808B4 Halbleitervorrichtung Semiconductor device |
| 04/06/2011 | EP2304452A1 Electrical anomaly detection method and system |
| 04/06/2011 | EP1442309B1 Method and circuit for detecting a fault of semiconductor circuit elements and use thereof in electronic regulators of braking force and of dynamics movement of vehicles |
| 04/06/2011 | CN201789292U 供电线路 Power lines |
| 04/06/2011 | CN201788267U Battery charge and discharge parameter acquisition unit |
| 04/06/2011 | CN201788262U Online monitoring system for current of generator brushes |
| 04/06/2011 | CN201788250U Electric leakage monitoring device being capable of using in abnormal power failure |
| 04/06/2011 | CN201788245U Online monitor device for service life of arrester with gaps |
| 04/06/2011 | CN201788233U Electric energy quality harmonic and over-voltage on-line monitoring device |
| 04/06/2011 | CN201788230U Dual manganin current sampling circuit |
| 04/06/2011 | CN201788223U High-voltage photoelectric conversion current sensor structure |
| 04/06/2011 | CN201788222U AC-DC (alternating current-direct current) compatible isolated voltage sampling circuit |
| 04/06/2011 | CN201788221U Dual-use test pen for alternating-current circuit and direct-current circuit |
| 04/06/2011 | CN201788220U Annular fastening-type current safety detector |
| 04/06/2011 | CN201788219U Induction voltage-measuring sensor of high-voltage charged displaying device |
| 04/06/2011 | CN201788218U Portable altitude electroscope |
| 04/06/2011 | CN201788217U Direct-current electric meter |
| 04/06/2011 | CN201788216U Current measuring circuit for electric power system |
| 04/06/2011 | CN201786568U Low voltage ride-through monitoring system of double-fed wind generator set |
| 04/06/2011 | CN102005812A Method and device for judging alternating current power failure |
| 04/06/2011 | CN102005744A Method for forming differential current based on current slow attenuation of differential current zero crossing identification CT (computed tomography) |
| 04/06/2011 | CN102005738A Method for identifying healthy phase saturation based on current amplitude ratio and differential current harmonic wave |
| 04/06/2011 | CN102005726A Method for identifying magnetizing inrush current and external fault CT (current transformer) saturation based on waveform discontinuous characteristic |
| 04/06/2011 | CN102004686A Current measuring device and computer system thereof |
| 04/06/2011 | CN102004540A Laptop |
| 04/06/2011 | CN102004474A Detection and controller for aircraft integration test general interface |
| 04/06/2011 | CN102004453A Control system and semiconductor device used therein |