| Patents for G01R 15 - Details of measuring arrangements of the types provided for in groups , or (13,411) |
|---|
| 05/11/1994 | WO1994010579A1 Method and apparatus for measuring partial discharges in cables |
| 05/11/1994 | EP0596233A2 High voltage signals detection device |
| 05/11/1994 | CA2146991A1 Method and apparatus for measuring partial discharges in cables |
| 05/04/1994 | CN2164052Y Iron-core coil type pulsating current sensor |
| 05/03/1994 | US5309556 Method for using interactive computer graphics to control electronic instruments |
| 05/03/1994 | US5309086 Current measuring transducer operating on the compensation principle |
| 05/03/1994 | CA1329251C Optical fibre measuring device, gyrometer, central navigation and stabilizing system |
| 04/27/1994 | EP0594500A1 Current measuring device with a shunt |
| 04/26/1994 | US5307008 Current ratio device and toroidal core assembly therefor |
| 04/21/1994 | DE4234789A1 Digitales Multimeter Digital Multimeter |
| 04/20/1994 | EP0592576A1 Arrangement in a current detection circuit |
| 04/20/1994 | CN2162655Y Sounds numerical universal watt-hour meter |
| 04/19/1994 | US5304920 Optical current transformer |
| 04/13/1994 | CN1085320A Power frequency test voltage measurer |
| 04/13/1994 | CN1085316A Automatic range switching device for dynamic balancing machine |
| 04/12/1994 | CA1328483C Digital signal transmission/reception using differential polarization modulation/demodulation |
| 04/12/1994 | CA1328482C Electro-optical voltage measuring system incorporating a method and apparatus to derive the measured voltage waveform from two phase shifted electrical signals |
| 04/05/1994 | US5300917 Junction box having integrally formed shunt |
| 04/05/1994 | CA1328298C Fault indicator having electrostatically actuated indicator flag |
| 03/31/1994 | WO1994007149A1 Capacitive voltage dividing circuit for power measurement |
| 03/29/1994 | US5298857 Electrical energy meter with a precision integrator for current measurement |
| 03/23/1994 | EP0587708A1 Determination of induced change of polarization state of light |
| 03/23/1994 | CN1084278A DC current sensor |
| 03/22/1994 | US5296802 Current sensor using a resonance directional magnetometer |
| 03/22/1994 | CA1328009C Monitoring system for power lines and right-of-way using remotely piloted drone |
| 03/17/1994 | WO1994006025A1 Fiber optical quartz voltage sensor |
| 03/17/1994 | DE4230939A1 Circuitry changing or compensating electrical properties of current converter with magnetic field compensation - contains prim., sec. and measurement coils on core, Hall element in air gap feeding compensation current source controller |
| 03/16/1994 | EP0587491A1 Measuring appliance using Rogowski coil |
| 03/16/1994 | CN2159030Y Multifunction electronic loading box |
| 03/15/1994 | US5295207 Optical apparatus for measuring current in a grounded metal-clad installation |
| 03/15/1994 | US5295176 Method and apparatus for precisely measuring accelerating voltages applied to x-ray sources |
| 03/10/1994 | DE4229449A1 Faseroptischer Quarz-Spannungs-Sensor A fiber-optic quartz voltage sensor |
| 03/09/1994 | EP0586226A2 Optical voltage electric field sensor |
| 03/09/1994 | EP0586202A2 Voltage measuring apparatus |
| 03/09/1994 | CN1083593A Phase modulation/frequency modulation photoelectric isolation method and its circuit for signal collecting system |
| 03/08/1994 | US5293121 Isolated current monitoring circuit for measuring direct and high duty factor currents |
| 03/03/1994 | DE4229678A1 Prodn. method for current converter formed from Rogowski coil - involves bendable non-magnetic winding carrier for control of power switches |
| 03/02/1994 | EP0584448A1 Current measuring appliance for a length of cable |
| 03/02/1994 | EP0584447A1 Current measuring appliance for a length of cable |
| 03/02/1994 | CN2158088Y Testing meter for electric appliances |
| 02/23/1994 | EP0583993A1 Measuring appliance and method at earth level for high voltage air lines |
| 02/22/1994 | US5289121 Composite pickup coil for measurement of magnetic field components in a superconducting quantum interference device |
| 02/22/1994 | US5289115 Electronic watt-hour meter with selection of time base signals |
| 02/22/1994 | US5289114 Voltage detection apparatus using short pulse light source with narrow spectral band width |
| 02/22/1994 | US5287591 Carpet cleaning machine with convertible-use feature |
| 02/16/1994 | CN1082197A Multimeter |
| 02/15/1994 | US5287107 Optical isolation amplifier with sigma-delta modulation |
| 02/15/1994 | US5287062 Reference voltage measuring bridge for a device for monitoring and measuring the insulation of a DC voltage electrical mains system |
| 02/09/1994 | EP0581993A1 Circuit arrangement for the control of a load and the detection of line interruption |
| 02/08/1994 | CA2030938C Automatic function selecting multimeter |
| 02/08/1994 | CA2030937C Automatic function selecting multimeter |
| 02/02/1994 | EP0581556A2 Non-contact type probe and non-contact type voltage measuring apparatus |
| 02/02/1994 | EP0581426A2 Autoranging instrument having selectable range setting restrictions |
| 02/01/1994 | US5283517 Variable color digital multimeter |
| 01/27/1994 | DE4224190A1 Fibre=optic sensor for detecting electric current in conductor - uses linearly polarised light source, polarising fibre, coupler, quarter wave retarder, sensor fibre and evaluates interference |
| 01/26/1994 | EP0580473A1 Current transformer with feedback for direct currents, alternative currents or pulsed currents |
| 01/25/1994 | US5281912 Magneto-optic magnetic-field measuring apparatus for measuring a magnetic field intensity by measuring an angle of diffraction |
| 01/19/1994 | EP0579462A2 DC current sensor |
| 01/19/1994 | EP0513077B1 Integrated optics pockels cell voltage sensor |
| 01/19/1994 | EP0276280B1 Method for remotely detecting an electric field |
| 01/19/1994 | EP0274529B1 Liquid crystal display |
| 01/18/1994 | US5280404 Arc detection system |
| 01/18/1994 | US5280173 Electric and electromagnetic field sensing system including an optical transducer |
| 01/11/1994 | US5278499 Fiberoptic apparatus for measuring electromagnetic field intensity with an electro-optic sensor |
| 01/11/1994 | US5278493 Multimeter having a measurement range switch |
| 01/06/1994 | WO1994000770A1 Method and device for indicating the direction of rotation of a three-phase system |
| 01/06/1994 | WO1994000768A1 Optical current sensor |
| 01/06/1994 | CA2138276A1 Method and device for indicating the direction of rotation of a three-phase system |
| 01/05/1994 | DE4221385A1 Encapsulated contactless magnetoresistive AC and DC current sensor - has plug-in IC incorporating split current path and permanent magnet stabiliser giving linear, externally adjustable response |
| 01/04/1994 | US5276394 Compensated transformers |
| 12/29/1993 | EP0523048B1 Fibre optic arrangement for measuring the strength of an electric current |
| 12/29/1993 | CN2151468Y AC/DC Loader |
| 12/28/1993 | US5274577 System for linearizing a non-linear sensor output |
| 12/23/1993 | DE4215900C1 Difference current detection system for DC fault current - has three or more current conductors arranged symmetrical to centre of sum current transducer core |
| 12/22/1993 | EP0574468A1 Apparatus and methods for measuring magnetic fields and electric currents |
| 12/22/1993 | EP0483189B1 Fibre optic arrangement for measuring the strength of an electric current |
| 12/22/1993 | CN2150619Y Current transformer electronic compensator |
| 12/21/1993 | US5272460 Current and voltage transformer for a metal-encapsulated, gas-insulated high-voltage installation |
| 12/15/1993 | EP0238524B2 Current transformer for a static electricity counter |
| 12/15/1993 | CN2149631Y Precision voltage divider |
| 12/08/1993 | EP0573350A1 Rogowski coil |
| 12/08/1993 | EP0573156A1 Optical isolation amplifier with sigma-delta modulation |
| 12/08/1993 | CN1079304A AC current comparator |
| 12/07/1993 | CA1324896C Primary and secondary optical sensor device |
| 12/01/1993 | CN1079053A AC/dc current comparison instrument |
| 11/25/1993 | WO1993023915A1 Voltage measuring circuit |
| 11/25/1993 | WO1993023759A1 Method of discriminating discrimination ojbect, detector therefor and input circuit of the detector |
| 11/24/1993 | CN2147543Y Composite measurer for electric appliances |
| 11/24/1993 | CN2147542Y Scan digital display three-phase electric voltage (current) meter |
| 11/23/1993 | US5264786 Electrical device for measuring electrical parameters |
| 11/18/1993 | EP0570206A2 Arc detection system |
| 11/18/1993 | EP0569700A2 Optical fiber sensor |
| 11/03/1993 | EP0567488A1 Methods and apparatus for measurements dependent on the faraday effect |
| 11/02/1993 | US5258704 Electronic watthour meter |
| 10/26/1993 | US5256979 Method and apparatus for measuring an unknown voltage, and power meter employing the same |
| 10/26/1993 | US5256968 Measurement of high-frequency electrical signals by electro-optical effect |
| 10/26/1993 | US5256961 Method for measuring various measurable variables, and multimeter for performing the method |
| 10/26/1993 | US5256872 Device for measuring current by optic fiber and dual polarization analysis |
| 10/26/1993 | US5255428 Electrooptic polymer voltage sensor and method of manufacture thereof |
| 10/20/1993 | EP0565946A2 Current sensor with direct measurement |