| Patents for H02H 3 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection (33,031) |
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| 01/20/1987 | US4638242 Method and device for measuring insulation deterioration of electric line |
| 01/13/1987 | US4636909 Digital impedance relay |
| 01/13/1987 | US4636907 Arcless circuit interrupter |
| 01/13/1987 | CA1216627A1 Circuit for synchronizing a switching power supply to a load clock |
| 01/08/1987 | DE3528641A1 High-voltage DC voltage source |
| 01/07/1987 | EP0207881A1 Method of generating a tripping signal in dependence upon the magnitude and the duration of an overcurrent |
| 01/07/1987 | EP0207880A1 Method of generating a tripping signal in dependence upon the magnitude and the duration of an overcurrent |
| 01/07/1987 | EP0207802A2 Ground fault receptacle with compact component arrangement |
| 01/07/1987 | EP0207086A1 Circuit for monitoring the electric current supply of a consumer. |
| 01/07/1987 | EP0110929B1 Sectionaliser |
| 01/06/1987 | US4635044 Failed fuse detector and detecting method for rotating electrical equipment |
| 01/06/1987 | US4634981 Method for testing a circuit breaker using a three terminal current transformer |
| 01/06/1987 | US4634936 Intrinsically safe miner's lamp |
| 01/06/1987 | CA1216322A1 Fault protection system for power supplies that use ferro-resonant transformers |
| 12/30/1986 | US4633358 H-switch circuit with an overcurrent protection circuit |
| 12/30/1986 | US4633241 Method of automated in-place SCR testing |
| 12/30/1986 | EP0206505A1 An overcurrent protective circuit for modulated-conductivity type MOSFET |
| 12/24/1986 | CN85201312U Mechanical interlocking contactor |
| 12/24/1986 | CN85104696A Improved circuit breaker panels with alarm system |
| 12/23/1986 | US4631625 Microprocessor controlled circuit breaker trip unit |
| 12/23/1986 | US4631624 Time delay undervoltage release |
| 12/23/1986 | US4631623 DC power control circuit with status reporting and protection against overloads and short circuits |
| 12/23/1986 | US4631622 Multiple static trip circuit breaker coordination |
| 12/23/1986 | US4631474 High or low-side state relay with current limiting and operational testing |
| 12/17/1986 | EP0204978A1 Shutdown control means for an electric power supply |
| 12/17/1986 | EP0204723A1 Auto-reset circuit breaker. |
| 12/17/1986 | CN86101390A Protective relaying apparatus for providing fault-resistance correction |
| 12/17/1986 | CN85104728A Method of antijamming for direct-current recirculating loops |
| 12/16/1986 | US4630161 Protection technique for exposed conductor |
| 12/16/1986 | US4629915 Frequency discrimination circuit |
| 12/16/1986 | CA1215459A1 Trip signal generator for a circuit interrupter |
| 12/10/1986 | CN86103901A Rms calculation circuit for digital circuit interrupters |
| 12/10/1986 | CN85104421A A singal generator for indicating fault in an a.c. network |
| 12/09/1986 | US4628396 High voltage disconnect/reconnect switching device |
| 12/03/1986 | EP0203472A1 Method for obtaining a backup function for a digital distance relay and relay to carry out the method |
| 12/03/1986 | EP0203419A1 Primary switching power supply |
| 12/03/1986 | EP0203366A1 Control device for electromagnetic commutators |
| 12/02/1986 | US4626953 Doubly overload-protected power distribution system |
| 12/02/1986 | US4626952 Protection apparatus for a transistor inverter |
| 11/26/1986 | EP0203029A1 Method of producing a tripping signal in dependence upon the amplitude and the duration of an overcurrent |
| 11/26/1986 | EP0202767A2 Symmetrical fault current detector |
| 11/26/1986 | EP0202756A1 Protection apparatus |
| 11/25/1986 | US4625283 Method and apparatus for digitally measuring alternating current |
| 11/25/1986 | CA1214539A1 Control circuit for a circuit interrupter |
| 11/25/1986 | CA1214538A1 Protective relay apparatus and method for providing single-pole tripping |
| 11/20/1986 | WO1986006889A1 A ground fault circuit interrupter with an additional current-sensing element |
| 11/20/1986 | EP0202096A1 Residual current detector |
| 11/18/1986 | US4623967 Computer-controlled switching apparatus |
| 11/18/1986 | US4623949 In a power system network |
| 11/12/1986 | EP0200946A1 Protective device for a user connected to the power supply line of an electrical power system |
| 11/12/1986 | CN86103419A Overcurrent protective circuit for modulated conductivity type mos fet |
| 11/06/1986 | WO1986006563A1 Fault-current protection switch for a.c. and d.c. fault currents without energy storage |
| 11/06/1986 | WO1986006562A1 Electronic overcurrent relay |
| 11/05/1986 | CN86102390A Control arrangements for electromagnetic switches |
| 11/04/1986 | CA1213665A1 Shock hazard protection system |
| 10/28/1986 | CA1213322A1 Power-off detection circuit for an electronic apparatus |
| 10/23/1986 | WO1986006223A1 Electronic fuse |
| 10/23/1986 | WO1986006222A1 Fault current protection circuit breaker |
| 10/22/1986 | EP0198694A1 Clutch control system for a continuously variable transmission |
| 10/22/1986 | EP0198684A2 Relays |
| 10/22/1986 | CN85204331U Disconnector for electric appliance in case of current leakage |
| 10/21/1986 | US4618907 Desensitized ground fault interrupter |
| 10/21/1986 | US4618906 Hybrid solid state/mechanical switch with failure protection |
| 10/21/1986 | US4618780 Power-off detection circuit for an electronic apparatus |
| 10/21/1986 | CA1213029A1 Ground fault circuit interrupter |
| 10/21/1986 | CA1212990A1 Intrinsically safe miner's lamp |
| 10/15/1986 | EP0197707A2 Electronic circuit breaker |
| 10/14/1986 | US4617636 Protection of electrical power supply systems |
| 10/14/1986 | US4617501 Control and safety system for electrically powered submersible tools and lights |
| 10/14/1986 | CA1212752A1 Phase synchronization and control circuit |
| 10/09/1986 | WO1986005932A1 Method and circuit for dissipating stored inductive energy |
| 10/08/1986 | EP0196802A2 Method and apparatus for controlling the operation of a DC load |
| 10/08/1986 | CN85103964A Motor protection method |
| 10/07/1986 | US4616324 Digital overcurrent tripping arrangement |
| 10/07/1986 | US4616207 Electric fuse holder having a Hall-effect current sensor |
| 10/07/1986 | CA1212411A1 Lightning arrester with leakage current detection |
| 10/01/1986 | EP0196066A2 Protective relay |
| 09/24/1986 | EP0195693A1 Static circuit interrupter with sampling and blocking of the last peak value of the signal |
| 09/23/1986 | US4613873 Printer with supply voltage control circuit |
| 09/23/1986 | US4613807 Low-noise system for measuring frequency in multiphase power transmission systems |
| 09/23/1986 | CA1211789A1 Electronic circuit breaker |
| 09/17/1986 | EP0194755A1 Method and apparatus for detection of AC power failure conditions |
| 09/16/1986 | US4612595 DC power control system |
| 09/16/1986 | US4612594 Protective relay system and sampling synchronizing method therefor |
| 09/10/1986 | EP0194176A1 Static numerical circuit interrupter with an inverse time-tripping function |
| 09/09/1986 | US4611174 Device for generating an AC ramp for checking the tripping current of a circuit-breaker |
| 09/09/1986 | US4611154 Method and apparatus for controlling the operation of a DC load |
| 09/09/1986 | CA1211199A1 Overcurrent protection device |
| 09/03/1986 | EP0193449A1 Static numerical circuit interrupter with optional functions |
| 09/03/1986 | EP0193448A1 Static circuit interrupter with a numerical treatment chain in parallel with an analogous treatment chain |
| 09/03/1986 | EP0193447A1 Static numerical circuit interrupter having a calibration circuit |
| 09/03/1986 | EP0193395A2 Universal fault circuit interrupter |
| 09/02/1986 | US4609865 Grounding system test apparatus |
| 09/02/1986 | CA1210846A1 Selective solid state trip unit associated with a limiting circuit-breaker |
| 09/02/1986 | CA1210814A1 Apparatus for detecting ground fault in variable- voltage variable-frequency power system |
| 09/02/1986 | CA1210798A1 Pipe thawing apparatus |
| 08/27/1986 | CN85204183U Automatic protecting device in overvoltage or undervoltage case for compressor of refrigerator |
| 08/27/1986 | CN85109150A Transmission lines protective systems |
| 08/26/1986 | US4608648 For power line systems |
| 08/26/1986 | US4608619 Ground fault voltage limiting for a locomotive electric traction motor |