| Patents for G01R 15 - Details of measuring arrangements of the types provided for in groups , or (13,411) |
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| 09/29/1999 | EP0944839A1 A current monitor system and a method for manufacturing it |
| 09/29/1999 | CN2341255Y Special zero current mutual-inductor for magnet-assisting ground detection |
| 09/29/1999 | CN1230258A Process for standardising intensity of optical sensors used for measuring periodically oscillating electric or magnetic field intensities |
| 09/29/1999 | CN1230257A Method and arrangement for optically detecting electrical variable |
| 09/28/1999 | US5959449 Process for the determination of electrical values without contacting |
| 09/28/1999 | US5959448 Optically isolated line voltage sensing circuit |
| 09/23/1999 | WO1999047938A1 Current measuring devices and method |
| 09/23/1999 | WO1999047936A1 Current sensor |
| 09/23/1999 | WO1999041616A3 Apparatus for fast measurements of current and power with scaleable wand-like sensor |
| 09/23/1999 | DE19811566A1 Potential-free electrical current measuring device e.g. for current measurement in electrical installation network |
| 09/23/1999 | CA2323511A1 Current measuring devices and method |
| 09/22/1999 | CN2339994Y 220 KV active optic-fiber current transformer |
| 09/22/1999 | CN1229475A Fiber optics apparatus and method for accurate current sensing |
| 09/22/1999 | CN1229474A Method, device and sensor for capacitive detecting of field and voltage and use thereof |
| 09/22/1999 | CN1229192A Voltage measurement instrument having transient overvoltage input protection |
| 09/21/1999 | CA2049685C High impedance voltage indicator having capacitive voltage divider |
| 09/16/1999 | WO1999046607A1 Apparatus for measuring high frequency currents |
| 09/16/1999 | DE19910360A1 Intelligent automated line circuit-breaker for overcurrent protection |
| 09/16/1999 | DE19808517A1 Einrichtung zur Strommessung Means for measuring current |
| 09/16/1999 | DE19805537A1 Electricity meter with measuring value detection and processing unit |
| 09/15/1999 | EP0815456B1 Electrical current sensor |
| 09/15/1999 | CN2338752Y Arrangment for measuring HY transmission current using electromagnetic induction current transformer |
| 09/14/1999 | US5953121 Magneto-optic current sensor having a mechanically stress-free λ/4 element |
| 09/14/1999 | US5952833 Programmable voltage divider and method for testing the impedance of a programmable element |
| 09/14/1999 | US5952820 Foreign voltage detector |
| 09/14/1999 | US5952819 Auto-zeroing current sensing element |
| 09/10/1999 | WO1999045405A1 Magnetic digital signal coupler |
| 09/10/1999 | WO1999045401A1 Device for measuring an electrical voltage or an electrical field using an electro-optical crystal with a tapered cross-section |
| 09/10/1999 | CA2320311A1 Magnetic digital signal coupler |
| 09/08/1999 | CN1227759A Wire breaking arc testing circuit for physiotherapeutic apparatus |
| 09/07/1999 | US5949231 Alternating current measuring device |
| 09/07/1999 | US5949230 Non-contact voltage probe apparatus |
| 09/02/1999 | WO1999044070A1 Device for measuring a current by means of a fibre-optic sagnac interferometer |
| 09/01/1999 | EP0855036A4 Ac current sensor |
| 09/01/1999 | CN2336364Y Electromagnetic unit for capacitance type voltage transformer |
| 08/31/1999 | US5945667 Method for temperature compensation of measuring signals of a fiber-optic sensor |
| 08/26/1999 | WO1999042845A1 Method and apparatus for monitoring ac circuits |
| 08/26/1999 | WO1999042844A1 Power monitoring apparatus |
| 08/26/1999 | DE19810781C1 Apparatus for measuring high voltage or electric or field using tapering electro-optical crystal |
| 08/25/1999 | EP0789840B1 Current/voltage transformer for the detection of the electron current in a scanning tunnelling-electron microscope |
| 08/25/1999 | CN1226760A Voltage converter for circuit breaker at high or mediate voltages |
| 08/24/1999 | US5943204 Electronic trip unit with dedicated override current sensor |
| 08/24/1999 | US5942701 Test probe for a measuring instrument and tester incorporating the test probe |
| 08/24/1999 | CA2064020C Fibre optic arrangement for measuring the strength of an electric current |
| 08/19/1999 | WO1999041618A1 Instrument for measuring alternating current |
| 08/19/1999 | WO1999041617A1 Method and device for measuring a magnetic field with the aid of the faraday effect |
| 08/19/1999 | WO1999041616A2 Apparatus for fast measurements of current and power with scaleable wand-like sensor |
| 08/19/1999 | DE19851551A1 Verfahren und Einrichtung zum Messen eines Magnetfeldes mit Hilfe des Faraday-Effektes Method and apparatus for measuring a magnetic field using the Faraday effect |
| 08/19/1999 | CA2320037A1 Method and device for measuring a magnetic field with the aid of the faraday effect |
| 08/18/1999 | CN2334089Y Antiresonant grounding voltage transformer |
| 08/17/1999 | US5939876 Measuring device for a metal-enclosed, gas-insulated high-voltage installation |
| 08/17/1999 | US5939711 Electro-optic voltage sensor head |
| 08/12/1999 | WO1999040446A1 Current measuring method, current sensor, and ic tester using the same current sensor |
| 08/11/1999 | EP0935141A2 Optical magnetic field sensor using magneto-optical element |
| 08/11/1999 | EP0934532A1 Self powered current sensor |
| 08/11/1999 | EP0646247B1 Terminal for connecting live conductors |
| 08/10/1999 | US5936421 Coaxial double-headed spring contact probe assembly and coaxial surface contact for engagement therewith |
| 08/10/1999 | US5936395 Electro optic voltage sensor with optic fiber |
| 08/10/1999 | US5935292 Annealing mold and retainer for making a fiber optic current sensor |
| 08/05/1999 | DE19802191A1 Optic current converter for current measurement |
| 08/04/1999 | EP0933641A2 Automatic power turn-on circuit for a battery-powered voltage measurement apparatus |
| 08/04/1999 | EP0933640A2 Power supply comprising a current sensor |
| 08/04/1999 | EP0933639A2 Insulating device for rogowski current measuring apparatus |
| 08/04/1999 | EP0932818A1 Apparatus with a retracing optical circuit for the measurement of physical quantities having high rejection of environmental noise |
| 08/03/1999 | US5933238 Optical current measurement device and method of manufacturing it |
| 08/03/1999 | US5933012 Device for sensing of electric discharges in a test object |
| 08/03/1999 | US5933003 Magnetoresistive wheatstone bridge with compensating current conductor for measuring an electric current |
| 07/29/1999 | DE19849250A1 Voltage testing unit for capacitive coupling of system parts at voltage across coupling electrode |
| 07/28/1999 | EP0931267A1 Method and device for measuring current |
| 07/28/1999 | CN2331066Y Zero sequence current mutual inductance |
| 07/28/1999 | CN1224501A Fiber optic current sensor with bend birefringence compensation |
| 07/27/1999 | US5927486 Rotary switch and tester assembly including click mechanism |
| 07/22/1999 | WO1999037006A1 Circuit interrupter having improved current sensing apparatus |
| 07/22/1999 | DE19819470A1 Non-potential measuring of currents by recording magnetic field |
| 07/21/1999 | EP0930507A1 Arrangement for measuring alternate current or direct current |
| 07/14/1999 | EP0929139A2 Electronic trip unit with dedicated override current sensor |
| 07/14/1999 | CN2329006Y 110 KV ceramic capacity subdivided optical fibre voltage mutual inductor |
| 07/14/1999 | CN2329005Y 110 KV non-subdivided optical fibre voltag mutual inductor |
| 07/14/1999 | CN2329004Y 110 KV passive optical fibre current mutual inductor insulation structure |
| 07/14/1999 | CN2329003Y 110千伏无源式光纤电流互感器 110 kilovolt passive fiber optic current transformer |
| 07/14/1999 | CN2329002Y General mutual inductor for ac voltage and current |
| 07/13/1999 | US5923162 Non-inductive lead path hall effect electrical current sensor |
| 07/13/1999 | US5923161 Graphical display device |
| 07/13/1999 | CA2162654C Method and apparatus for determining and selectively displaying valid measurement information |
| 07/13/1999 | CA2125395C Optical voltage and electric field sensor based on the pockels effect |
| 07/12/1999 | CA2258179A1 Electronic trip unit with dedicated override current sensor |
| 07/07/1999 | EP0927357A1 Sensor to measure electrical current intensity and/or voltage |
| 07/07/1999 | CN2328015Y Capacitor voltage mutual inductor with harmonic detection function |
| 07/06/1999 | US5920196 Rapid low voltage testing apparatus |
| 07/06/1999 | US5920189 Auto ranging current monitor with common mode correction |
| 07/06/1999 | US5920188 Voltage measurement instrument having transient overvoltage input protection |
| 07/01/1999 | DE19755673A1 Magnetoresistive sensor device, especially for non-contact rotary and linear position generator or magnetic field sensor |
| 06/29/1999 | US5918194 Integrated modular measurement system having configurable firmware architecture and modular mechanical parts |
| 06/29/1999 | US5917316 Measuring device for a metal-enclosed, gas-insulated high-voltage installation |
| 06/24/1999 | WO1999031520A1 A plant and a method in connection therewith |
| 06/23/1999 | CN1043818C Current sensor comprising magnetic circuit with air gap |
| 06/23/1999 | CN1043817C Method and apparatus for measuring voltage |
| 06/17/1999 | WO1999030203A1 Electro-optic voltage sensor head |
| 06/17/1999 | DE19755773A1 Measurement arrangement for time function of large electric current with short rise-time, especially for GTO thyristor |
| 06/16/1999 | EP0922961A2 Voltage measurement instrument having transient overvoltage input protection |