| Patents for G01R 15 - Details of measuring arrangements of the types provided for in groups , or (13,411) |
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| 08/25/1998 | US5799116 Electromagnetic wave-to-optical signal converting and modulating device and a communication system using the same |
| 08/25/1998 | CA2083216C Electrical energy meter with a precision integrator for current measurement |
| 08/20/1998 | WO1998036283A1 Current sensor with self-oscillating generator circuit |
| 08/20/1998 | WO1998036282A1 Current detector working in accordance with the compensation principle |
| 08/20/1998 | WO1998036281A1 Current sensor using the compensation principle |
| 08/20/1998 | DE19705768A1 Stromsensor nach dem Kompensationsprinzip Current sensor according to the compensation principle |
| 08/19/1998 | CN2288493Y Indoor/outdoor dry voltage transformer |
| 08/13/1998 | DE19802831A1 Appliance for measuring alternating current which saturate the current transformer core using secondary currents up to saturation point |
| 08/12/1998 | CN2287726Y Grip type DC current meter |
| 08/12/1998 | CN1190189A Large current measurement range expanding method for digital multimeter |
| 08/11/1998 | US5793196 Current transformer for measuring differential-mode and common-mode current |
| 08/06/1998 | DE19703616A1 Sensor for a turbo generator |
| 08/05/1998 | EP0856737A1 Magneto optical current sensor |
| 08/04/1998 | US5789914 Onboard digital locomotive horsepower multimeter |
| 07/29/1998 | EP0855036A1 Ac current sensor |
| 07/29/1998 | CN1188894A Differential pressure divided-flow detection circuit and appliedd circuit |
| 07/23/1998 | DE19701324A1 Switching circuit for measuring low frequency AC current |
| 07/22/1998 | EP0854354A1 Method for temperature compensation of signals measured by fibre-optic sensors |
| 07/22/1998 | EP0853765A1 Verdet constant temperature-compensated current sensor |
| 07/16/1998 | WO1998030915A1 Ceramic fiber optic current sensor |
| 07/15/1998 | CN2286315Y Multi-phase mounting rectification system AC ammeter |
| 07/14/1998 | US5781003 Electric field sensor |
| 07/14/1998 | US5780847 Verdet constant temperature-compensated current sensor |
| 07/14/1998 | US5780845 Optical current transformer |
| 07/01/1998 | EP0851442A2 Lead-in insulator |
| 07/01/1998 | CN2285508Y Step fixing type current transformer |
| 06/24/1998 | EP0849600A1 Optical current transformer |
| 06/24/1998 | EP0848824A1 Voltmeter suitable for medium/high-voltage installations, with a surface wave device |
| 06/17/1998 | EP0848395A2 Current-meter transformer provided with a current divider |
| 06/17/1998 | CN2284443Y Current transformer |
| 06/17/1998 | CN1184938A Circuit arrangement for isolated voltage and/or current measurement |
| 06/16/1998 | US5768462 For modifying optical signals propagated through the fiber |
| 06/16/1998 | US5767688 For detecting a voltage of a sample |
| 06/16/1998 | US5767684 Method and apparatus for measuring partial discharges in cables |
| 06/16/1998 | US5767667 For measuring the flow of line current |
| 06/16/1998 | CA2104978C Optical voltage-electric field sensor |
| 06/09/1998 | US5764123 Transformer with reduced signal rise time |
| 06/09/1998 | US5764046 Optical method and device for measuring an alternating electrical current with temperature compensation |
| 06/04/1998 | DE19650078A1 Sensor element for determining magnetic field or current |
| 06/04/1998 | DE19648230A1 Capacitive alternating voltage divider |
| 06/03/1998 | EP0845846A1 Device for fault detection and measurement on electrical power lines |
| 06/03/1998 | EP0845678A2 Voltage insulated voltage and/or current measuring circuit |
| 06/03/1998 | EP0845107A1 Measurement system for electric disturbances in a high-voltage switchboard plant |
| 06/03/1998 | EP0771421B1 Voltage transformer for metal-clad electric switchgear |
| 06/03/1998 | EP0757796B1 Device for connecting a voltage display apparatus to a sensor |
| 06/03/1998 | CN1183561A Integral compensation fibre-optic current sensor |
| 05/27/1998 | EP0843824A1 Method of testing a connection which includes a conductor in an integrated circuit |
| 05/27/1998 | EP0783701B1 Optical interferometric current sensor and a method for measuring an electrical current |
| 05/20/1998 | EP0779988B1 Process and device for measuring an alternating electric current with temperature compensation |
| 05/20/1998 | EP0776477B1 Method and device for the measurement of electric currents in at least two measurement ranges |
| 05/20/1998 | EP0641444B1 Optical voltage and electric field sensor based on the pockels effect |
| 05/20/1998 | DE19639948C1 Optische Meßvorrichtung für elektrische Felder/Spannungen mit planarem Aufbau und optimierter Kleinsignalempfindlichkeit und insbesondere linearer Kennlinie An optical measuring device for electric fields / voltages with a planar structure and optimized small-signal sensitivity and in particular linear characteristic |
| 05/19/1998 | US5754041 Device for measuring voltage/current characteristics with means to prevent output transients during changes in settings |
| 05/14/1998 | WO1998020658A2 Non-invasive powerline communications system |
| 05/14/1998 | WO1998020468A1 Modular core, self-powered powerline sensor |
| 05/14/1998 | DE19703300C1 Voltage divider for medium voltage apparatus |
| 05/13/1998 | CN1181813A Radio-interrogatable current transformer using surface wave tech. for high-voltage installations |
| 05/13/1998 | CN1181503A Rogovski coil |
| 05/12/1998 | US5751284 Current signal correction process and device |
| 05/12/1998 | US5751143 Opto-electronic system for the acquisition of signals indicating the presence of a voltage and its phase |
| 05/12/1998 | US5750669 Nuclease-stable antiviral agents which can suppress synthesis of antigens and gene expression of proteins |
| 05/12/1998 | CA2047378C Optical magnetic-field sensor |
| 05/07/1998 | WO1998019195A1 High voltage insulator |
| 05/06/1998 | CN2280914Y Anti-interference sensor |
| 05/06/1998 | CN2280913Y Digital Universal meter with speech prompting alarming function |
| 05/05/1998 | US5748392 Optical voltage sensor, group of optical parts and method of manufacturing same |
| 04/30/1998 | WO1998017976A1 Apparatus with a retracing optical circuit for the measurement of physical quantities having high rejection of environmental noise |
| 04/30/1998 | WO1998007165A3 Magnetic current sensor |
| 04/29/1998 | EP0838686A2 Self-powered axial current sensor |
| 04/29/1998 | CN2280346Y Current mutual-inductor |
| 04/29/1998 | CN2280345Y End-buried type mutual-inductor |
| 04/28/1998 | US5745233 Voltage detecting circuit |
| 04/28/1998 | CA2130093C Method and apparatus for measuring voltage |
| 04/23/1998 | WO1998016841A1 A device for monitoring partial discharges in an electric high-voltage apparatus or high-voltage equipment |
| 04/23/1998 | WO1998016839A1 Method and device for measuring current |
| 04/23/1998 | DE19701221C1 Method of temperature compensation of measurement signals of fibre optical sensors |
| 04/22/1998 | EP0836710A1 Shunt assembly for current measurement |
| 04/22/1998 | EP0783703A4 Fault sensor device with radio transceiver |
| 04/21/1998 | US5742157 Optical fiber magnetic-field sensor |
| 04/21/1998 | CA2049832C Optical magnetic-field sensor and method of producing the same |
| 04/16/1998 | DE19642472A1 Current sensor based on compensation principle |
| 04/15/1998 | CN1179212A Electrical current sensor |
| 04/09/1998 | DE19639944A1 Optische Meßvorrichtung für elektrische Felder/Spannungen mit verringerter Temperaturabhängigkeit An optical measuring device for electric fields / voltages with reduced temperature dependence |
| 04/08/1998 | EP0834745A2 Rogowski coil |
| 04/08/1998 | EP0834078A1 High voltage measuring device |
| 04/08/1998 | EP0767916B1 High-impedance electro-optic transducer |
| 04/07/1998 | US5737082 Method of electro-optical measurement for vector components of electric fields and an apparatus thereof |
| 04/07/1998 | US5736846 AC current sensor |
| 04/07/1998 | US5736737 Device for sensing electrical current flowing through a conductor |
| 04/02/1998 | WO1998013698A1 Optical measuring device for electrical fields/voltages with planar structure |
| 04/02/1998 | WO1998013697A1 Optical measuring device for electrical fields/voltages with reduced temperature-dependence |
| 04/02/1998 | WO1998013696A1 Circuit arrangement for measuring current in an electric conductor to control electronically controllable tripping devices |
| 04/02/1998 | DE19641186A1 Schaltungsanordnung zur Strommessung eines Stromleiters zur Ansteuerung von elektrisch steuerbaren Auslöseeinrichtungen Circuitry for measuring current a conductor for the control of electrically controllable release mechanisms |
| 04/01/1998 | CN2277557Y Current transformer avoiding or indicating fraudulent use of electricity |
| 03/31/1998 | US5734264 Device for measuring electric current, including a sensor sensitive to magnetic flux and intended in particular for electrically propelled vehicles |
| 03/31/1998 | US5734263 Apparatus for measuring a voltage |
| 03/31/1998 | CA2021712C Optical current transformer |
| 03/26/1998 | WO1998012567A1 Optical measuring device operating according to the pockels effect principle for electrical field strength/voltage measurement with minimum temperature-dependence |
| 03/26/1998 | WO1998012565A1 Sensor to measure electrical current intensity and/or voltage |
| 03/26/1998 | DE19717496C1 System for magneto=optical current e.g. direct current (DC) measurements, with at least one light source |