| Patents for H02H 1 - Details of emergency protective circuit arrangements (5,580) |
|---|
| 01/26/1983 | EP0020349B1 Supervision device with a passive optical detector for electrical arcs in a circuit-breaker |
| 01/18/1983 | US4369364 Monitoring device with an optical sensor for the detection of interference arcs in electrical systems |
| 01/11/1983 | US4368394 Computer-controlled switching device |
| 01/11/1983 | CA1139417A1 Power supply for circuit breaker static trip unit |
| 12/14/1982 | CA1137612A1 Electronic overcurrent detection and tripping circuit |
| 12/07/1982 | US4363066 Protective relay |
| 12/07/1982 | US4363064 Overcurrent protection system |
| 12/07/1982 | US4363062 Inductive voltage transformer and circuit therefor |
| 12/07/1982 | US4363061 Electric motor and transformer load sensing technique |
| 11/02/1982 | CA1134914A1 Fault indicator with external excitation means |
| 10/12/1982 | CA1133621A1 Inrush current restraint circuit for alternating power system switch |
| 10/06/1982 | EP0061649A1 Protective relay |
| 09/29/1982 | EP0061254A1 Apparatus for and methods of monitoring partial discharge in high voltage electrical equipment |
| 09/28/1982 | US4352138 Backup trip circuit for a circuit breaker |
| 09/08/1982 | EP0059416A1 Ground fault detecting device for use with a DC circuit |
| 09/07/1982 | US4348709 Electronic load protection circuit |
| 09/07/1982 | US4348708 Ground fault circuit interrupting device with improved coordination of electronic circuit operation |
| 09/07/1982 | CA1131296A1 Ground fault circuit interrupter |
| 08/18/1982 | EP0057948A2 Method of protecting electric networks in case of oscillations by means of a blocking device, and blocking device for carrying out this method |
| 08/17/1982 | US4345289 Ground fault circuit interrupting device with improved thyristor triggering |
| 08/11/1982 | EP0057498A1 Ground isolation monitoring apparatus having a protective circuit |
| 08/03/1982 | CA1128985A1 Relay protection with functional value switching |
| 07/27/1982 | US4342063 Memory circuit in a relay protection device |
| 07/06/1982 | US4338647 Circuit interrupter with digital trip unit and optically-coupled data input/output system |
| 06/09/1982 | EP0053229A1 Method and circuit for detecting and breaking disturbing electric arcs |
| 05/25/1982 | US4331999 Circuit interrupter with digital trip unit and power supply |
| 05/25/1982 | US4331996 Time delayed undervoltage relay |
| 05/18/1982 | CA1123943A1 Overcurrent relay |
| 05/11/1982 | US4329653 Circuit arrangement for storing the phase of an a-c voltage |
| 04/27/1982 | CA1122655A1 Directional relaying technique |
| 03/23/1982 | US4321647 Overcurrent relays |
| 03/23/1982 | US4321643 Ground monitoring system |
| 02/17/1982 | EP0046024A1 Earth leakage current breaker |
| 02/03/1982 | EP0045286A2 Electronic indicator of absorbed current, expressed as a percentage of a prefixed limit, the exceeding of which activates an acoustic alarm |
| 02/02/1982 | US4314301 Protective relaying devices |
| 01/26/1982 | US4313146 High impedance fault detection on power distribution circuits |
| 12/29/1981 | US4307775 Current monitoring control for electrically powered devices |
| 12/15/1981 | CA1114488A1 Bridge circuits for sensing currents in a three phase a.c. circuit |
| 12/09/1981 | EP0041469A1 Inductive voltage transformer |
| 11/25/1981 | EP0040471A1 Protective relaying system |
| 11/18/1981 | EP0040142A1 Measured current-dependent, by this current powered signal generator, and application to current relays |
| 10/20/1981 | US4296452 Multiphase fault protection circuitry with variable functional level detection |
| 10/20/1981 | US4296450 Discriminating circuit breaker protection system direct current power distribution systems |
| 10/14/1981 | EP0037751A1 Static tripping device for an electric circuit-breaking switch |
| 10/06/1981 | CA1110318A1 Arc detection and control apparatus |
| 09/30/1981 | EP0036417A1 Cut off device monitored by a computer. |
| 09/08/1981 | US4288743 Fault indicator operable from a remote excitation source through a uniformly distributed impedance cable |
| 09/08/1981 | CA1108765A1 Protective relaying system |
| 08/25/1981 | CA1107864A1 Power confidence system |
| 08/12/1981 | EP0033368A2 Method of protecting a D.C. converter against excessive voltages |
| 07/21/1981 | US4280059 Detecting power loss in free turbines |
| 06/30/1981 | CA1104243A1 Ground fault circuit interrupter module |
| 06/23/1981 | US4275429 Protective relay apparatus |
| 06/11/1981 | WO1981001632A1 Switching-typedistance relay apparatus |
| 06/02/1981 | US4271447 Power supply for circuit breaker static trip unit |
| 06/02/1981 | US4271444 Ground fault trip mode network for static trip circuit breakers |
| 05/19/1981 | US4268887 Protective system for power stage of IC amplifier |
| 05/12/1981 | CA1101065A1 Apparatus for sensing a high phase signal from a multi-phase ac load circuit |
| 04/16/1981 | WO1981001092A1 Cut off device monitored by a computer |
| 04/15/1981 | EP0026801A1 Method of and apparatus for transmitting information about flow of fault current in a faulty section of an electric power transmission system |
| 04/08/1981 | EP0026356A1 Circuit arrangement, especially for multiple-pole fault current protection switches |
| 04/08/1981 | EP0026355A1 Circuit arrangement for multiple-pole fault-current protection switches |
| 04/08/1981 | EP0026354A1 Circuit arrangement for multiple-pole fault current protection switches |
| 03/31/1981 | US4259659 Flasher apparatus for vehicles |
| 03/24/1981 | US4258403 Ground fault circuit interrupter |
| 02/17/1981 | US4251766 Method and apparatus for determining the direction of a fault on a power transmission line |
| 02/10/1981 | US4250532 Electronic overcurrent detection and tripping circuit |
| 02/03/1981 | US4249170 Annunciator |
| 01/20/1981 | US4246623 Protective relay device |
| 01/13/1981 | CA1093435A1 Metallurgical treatment using a glow discharge |
| 01/07/1981 | EP0020349A1 Supervision device with a passive optical detector for electrical arcs in a circuit-breaker. |
| 12/23/1980 | US4241369 Electrical power source for an electronic flash unit |
| 12/10/1980 | EP0019904A1 Overcurrent protective relais |
| 12/09/1980 | US4238696 Failsafe electrical circuitry |
| 12/02/1980 | CA1090912A1 Circuit breaker apparatus including asymmetrical fault detector |
| 11/04/1980 | CA1089073A1 Solid state inverse overcurrent relay |
| 10/14/1980 | US4228476 Protective relaying system |
| 10/14/1980 | CA1087677A1 Electrical protection circuits |
| 10/01/1980 | EP0015959A1 Protection arrangement against a solicitation by suppression of the encapsulation upon an accidentel arc discharge in switching devices encapsulated and insulated by pressure gas |
| 09/23/1980 | CA1086375A1 High speed fault diverter switch for gas-insulated systems |
| 09/09/1980 | CA1085449A1 Filter excitation circuitry |
| 09/03/1980 | EP0015226A2 Circuitry for memorizing the phase position of an alternating voltage |
| 09/02/1980 | CA1084995A1 Induction control circuit for current transformer |
| 08/20/1980 | EP0014537A2 Direction indicating apparatus for vehicles |
| 08/12/1980 | US4217620 Circuit for controlling induction in current transformers |
| 07/15/1980 | US4213165 Circuit breaker having an electronic fault sensing and trip initiating unit |
| 07/15/1980 | CA1081779A1 Overvoltage protection circuit using photoswitches |
| 07/10/1980 | WO1980001442A1 Supervision device with an optical detector for electrical arcs in a circuit-breaker |
| 06/24/1980 | CA1080126A1 Protective circuit for electroacoustic transducer |
| 04/22/1980 | US4199798 Phase balance monitoring system incorporating voltage and phase sequence monitoring |
| 04/01/1980 | US4196388 Apparatus for monitoring high alternating voltages |
| 04/01/1980 | CA1074853A1 Arrangement for limiting dynamic overvoltages |
| 03/18/1980 | US4194231 Dual voltage ground fault protector |
| 03/11/1980 | US4193070 Method and arrangement for controlling the electrical relationships of a current-intensive glow discharge |
| 03/04/1980 | US4191925 Power line protection circuit |
| 02/05/1980 | US4187523 Detecting a short circuit fault in a dynamo electric machine |
| 02/05/1980 | CA1071301A1 Over-current protective apparatus for a power circuit |
| 12/04/1979 | US4177492 Electrical protection circuits |
| 12/04/1979 | US4177404 Arc detector for glow discharges |
| 11/29/1979 | WO1979001033A1 Protection arrangement against a solicitation by suppression of the encapsulation upon an accidental arc discharge in switching devices encapsulated and insulated by pressure gas |