| Patents for G01R 15 - Details of measuring arrangements of the types provided for in groups , or (13,411) |
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| 11/10/1987 | US4706016 Surge detector having distributed line inductance pickup |
| 11/04/1987 | EP0244248A2 Electro-optic sampler |
| 11/04/1987 | EP0243630A1 Arrangement for the contactless measuring of an electric current in a conductor |
| 11/03/1987 | USH371 Optical fiber interferometer |
| 11/03/1987 | US4704575 Hall-effect current clamp |
| 10/28/1987 | EP0242625A1 Measuring device associating a measured value to a measured unit, and measuring probe therefor |
| 10/28/1987 | EP0242560A1 Arrangement for the contactless measuring of an electric current in a conductor |
| 10/27/1987 | US4702553 Fiber-optical sensor for detecting electric arc-discharges |
| 10/22/1987 | WO1987006352A1 Multimeter |
| 10/22/1987 | DE3705468A1 Circuit arrangement for detecting and measuring the output current of an isolating transformer (flyback converter) |
| 10/21/1987 | EP0242250A2 Opto-electronic device to detect a physical quantity at a distance |
| 10/21/1987 | EP0241835A2 Circuit for driving a multiple-element display |
| 10/15/1987 | DE3611689A1 Recording tester having an upstream-connected measurement converter |
| 10/14/1987 | EP0241332A2 Opto-electronic device to detect a physical quantity at a distance |
| 10/14/1987 | EP0240959A1 Clamp-on measuring device |
| 10/13/1987 | US4700131 In a three phase ac line |
| 10/13/1987 | US4700123 Power distribution systems and means for control thereof |
| 10/13/1987 | US4700064 Temperature varying optical measurement device |
| 10/08/1987 | DE3610742A1 Supporting insulator |
| 10/07/1987 | EP0239691A2 Potentiometer for a voltage-measuring instrument |
| 10/06/1987 | US4698497 Direct current magneto-optic current transformer |
| 09/30/1987 | EP0238748A2 Travelling wave sampler |
| 09/30/1987 | EP0238524A1 Current transformer for a static electricity counter. |
| 09/24/1987 | WO1987005692A2 Remote opto-electronic detection device and method for the detection of physical magnitudes |
| 09/24/1987 | WO1987005691A2 Remote opto-electronic detection device for detecting a physical magnitude |
| 09/23/1987 | EP0237652A1 AC current sensing circuit |
| 09/22/1987 | US4695803 HID lamp ballast tester |
| 09/16/1987 | CN86104307A Voltage divider for voltage measuring instruments |
| 09/15/1987 | US4694243 Optical measurement using polarized and unpolarized light |
| 09/08/1987 | US4692693 Apparatus for measuring low currents with high dynamics |
| 09/02/1987 | EP0233988A1 Current converter for measuring current flowing in an electric conductor |
| 08/25/1987 | US4689752 System and apparatus for monitoring and control of a bulk electric power delivery system |
| 08/25/1987 | US4689546 Internal armature current monitoring in large three-phase generator |
| 08/19/1987 | CN87100638A Measuring transformer for measuring current flowing in electrical conductor |
| 08/12/1987 | EP0231909A2 RF antenna for transmission line sensor |
| 08/12/1987 | EP0231410A1 Method and circuit for measuring and displaying a physical quantity |
| 08/04/1987 | US4684886 Automatic equalizer |
| 08/04/1987 | US4684827 Circuit arrangement for detecting a current in power supply devices |
| 07/30/1987 | DE3601934A1 Permanently monitored capacitor bushing arrangement for large transformers in three-phase networks (grids, mains power supplies) |
| 07/28/1987 | US4683513 Dual current transformer current sensing method and sensor |
| 07/28/1987 | US4683421 Drift compensation technique for a magneto-optic current sensor |
| 07/21/1987 | US4682101 Current transformer for direct and alternating current |
| 07/08/1987 | EP0228012A1 Internal armature current monitoring in large three-phase generator |
| 07/08/1987 | EP0227773A1 Digital information transmission system and method |
| 07/08/1987 | EP0227729A1 Coherent optical receivers |
| 07/08/1987 | EP0227669A1 Remote sensor with compensation for lead resistance |
| 07/08/1987 | CN86108255A Internal armature current monitoring in large three-phase generator |
| 07/07/1987 | US4679245 Radio receiver |
| 07/07/1987 | CA1223931A1 Non-magnetic core current sensor |
| 07/01/1987 | EP0227498A1 Centralized measuring device for electric installations |
| 06/30/1987 | US4677536 AC Current sensing circuit |
| 06/25/1987 | DE3544542A1 Method and device for detecting surge voltages |
| 06/24/1987 | EP0226476A1 Voltage-measuring device for a shielded high-voltage installation |
| 06/23/1987 | US4675255 Clamp on, for display or measuring device |
| 06/19/1987 | DE3544508A1 Combined transducer for measuring current and voltage simultaneously on pipe-sheathed conductors |
| 06/17/1987 | CN86203080U Logic tester |
| 06/10/1987 | CN86203593U Small-size large-capacity high frequency attenuator |
| 05/27/1987 | EP0223507A2 Transmission line sensor apparatus |
| 05/27/1987 | DE3541274A1 Current measuring device for a static converter |
| 05/26/1987 | US4668085 For responding to a magnetic field |
| 05/21/1987 | DE3540988A1 Circuit for measurement conversion with direct-current isolation |
| 05/06/1987 | EP0220287A1 Ac-dc transfer standard temperature sensor reversal error compensation circuit |
| 05/05/1987 | US4663586 Device with automatic compensation of an ac attenuator |
| 04/22/1987 | EP0218893A2 Process and device for remotely measuring and controlling the operational condition of a high-voltage apparatus |
| 04/22/1987 | EP0218737A1 Device for driving a cross-coil instrument |
| 04/21/1987 | US4659910 AC-DC transfer standard temperature sensor reversal error compensation circuit |
| 04/21/1987 | CA1220820A1 Metering system for measuring parameters of high ac electric energy flowing in an electric conductor |
| 04/16/1987 | DE3619423A1 Current transformer arrangement for a solid-state electricity meter |
| 04/15/1987 | EP0218225A2 Transmission line mounted sensor module |
| 04/15/1987 | EP0218224A2 Tool for mounting a sensor module on a live power transmission line |
| 04/15/1987 | EP0218223A2 Hinge clamp for securing a sensor module on a power transmission line |
| 04/15/1987 | EP0218222A2 Apparatus for data transmission from multiple sources on a single channel |
| 04/15/1987 | EP0218221A2 Apparatus for measuring the potential of a transmission conductor |
| 04/15/1987 | EP0218220A2 Apparatus for measuring and calculating fourier components of a power line parameter |
| 04/15/1987 | CN86107201A Voltage measuring device of a high voltage metalclad installation |
| 04/14/1987 | CA1220525A1 Electronic circuitry with self-calibrating feedback for use with an optical current sensor |
| 04/09/1987 | DE3536020A1 Circuit for changing or linearising a transfer characteristic and method carried out accordingly |
| 04/08/1987 | EP0217147A1 Circuit arrangement for feeding signals to a rotating magnet measuring unit |
| 04/08/1987 | CN85107432A Method for measuring on-line d.c. current and on-line galvanometer |
| 04/07/1987 | US4656554 Shunt arrangement with power overload protection by a voltage responsive bidirectional switch |
| 04/01/1987 | EP0216037A1 Device for measuring the transient potential of the case of a metal encapsulated, gas-insulated high tension plant |
| 03/26/1987 | WO1987001812A1 Current transformer for a static electricity counter |
| 03/24/1987 | CA1219636A1 Data acquisition system for the computer control of aluminum smelters |
| 03/18/1987 | EP0214532A2 Terminal clamp |
| 03/18/1987 | EP0214523A2 Device for digitalizing measured signals |
| 03/18/1987 | CN85106483A Differential amplifiers with junction field effect transistor resistance |
| 03/17/1987 | US4650971 Energization indicator and method for heat trace cable and the like |
| 03/12/1987 | DE3622127A1 Circuit arrangement of a logarithmic amplifier, preferably for measuring a photocurrent |
| 03/10/1987 | US4649336 Automatic, self sustaining probe for measuring the work function |
| 03/05/1987 | DE3527021C1 Remote voltage tester |
| 03/04/1987 | EP0212931A1 Improvements relating to air ionizers |
| 03/04/1987 | EP0212156A2 Measuring circuit arrangement for an electrical sensor |
| 03/03/1987 | US4647795 Travelling wave sampler |
| 02/26/1987 | DE3532524A1 Device for measuring the transient potential of the encapsulation of a metal-encapsulated, gas-insulated high-voltage installation |
| 02/24/1987 | CA1218452A1 Multiprobe measuring instrument |
| 02/17/1987 | US4644153 Optical sensing equipment |
| 02/17/1987 | CA1218108A1 Surge arrester equipped for monitoring functions and method of use |
| 02/10/1987 | CA1217817A Measurement device for use in high-voltage gas- insulated switch gears |
| 02/04/1987 | EP0210716A1 Drift compensation technique for a magneto-optic current sensor |
| 01/28/1987 | EP0209769A1 Testing arrangement for an electrical signal-processing unit |