| 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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| 10/04/1979 | WO1979000768A1 Circuit breaker having an electronic fault sensing and trip initiating unit |
| 10/03/1979 | EP0004286A2 Fault current protection interruptor |
| 09/25/1979 | CA1063228A1 Circuit breaker including undervoltage release mechanism and control circuit |
| 09/25/1979 | CA1063227A1 Protective relay circuits |
| 09/25/1979 | CA1063226A1 Multi-function solid state trip unit with trip indicating means |
| 09/25/1979 | CA1063225A1 Ground fault protective apparatus and method |
| 09/25/1979 | CA1063224A1 Ground fault circuit interrupter utilizing a single transformer |
| 09/25/1979 | CA1063223A1 Ground fault circuit interrupting device with grounded neutral detection |
| 09/25/1979 | CA1063222A1 Current differential fault detection circuit |
| 09/25/1979 | CA1063219A1 Ground-fault protective scheme for multiple-source electric distribution system |
| 09/25/1979 | CA1063180A1 Power supply for magnetron |
| 09/25/1979 | CA1063174A1 Method and apparatus for locating a fault on a line |
| 09/18/1979 | US4168514 Combination circuit breaker-lightning arrestor |
| 09/06/1979 | WO1979000657A1 Process and device for detecting the position of a fault in an electric connection |
| 09/04/1979 | CA1061861A1 Protection system and method for high voltage direct current transmission system |
| 08/28/1979 | CA1061444A1 Compressed gas filled circuit breaker |
| 08/14/1979 | US4164773 Transfer trip circuit with pilot wire monitoring |
| 08/14/1979 | US4164771 Wireless emergency power interrupting system for multibranch circuits |
| 08/07/1979 | CA1060087A1 Two pole ground fault circuit interrupter with improved rectified supply and transient suppression for a trip circuit |
| 07/31/1979 | US4163269 Ground fault and fire detector system |
| 07/31/1979 | CA1059609A1 Static overcurrent relays |
| 07/31/1979 | CA1059608A1 Static overcurrent relay |
| 07/31/1979 | CA1059607A1 Ground fault circuit interrupting device and differential current sensor therefor |
| 07/31/1979 | CA1059606A1 Ground fault circuit interrupter and electronic module therefor |
| 07/24/1979 | US4162526 Failsafe primary power control apparatus for systems using computer controlled power sequencing |
| 07/17/1979 | US4161761 Proportional ground current relay |
| 07/17/1979 | CA1058741A1 Timing circuit for electronic undervoltage detecting device and latch |
| 07/17/1979 | CA1058739A1 Portable ground fault circuit interrupter |
| 07/17/1979 | CA1058738A1 Performance of current transformers during transients |
| 07/10/1979 | US4161027 Digital protection system for transmission lines and associated power equipment |
| 07/10/1979 | US4161011 Ground distance relay employing phase comparator measurement |
| 07/10/1979 | US4161009 Automatic crowbar and arc quenching system |
| 07/10/1979 | CA1058291A1 Protective relay device |
| 07/10/1979 | CA1058257A1 Multi-pole ground fault circuit breaker |
| 07/03/1979 | US4160282 Overcurrent protection apparatus |
| 06/26/1979 | US4159514 Signal loss detector for three phase circuit |
| 06/26/1979 | US4159501 Method and apparatus for indicating the leakage resistance in an electrical system |
| 06/26/1979 | US4159499 Ground fault detection and protection circuit |
| 06/19/1979 | CA1056916A1 Ground-fault detection system |
| 06/19/1979 | CA1056910A1 Method and apparatus for detection of short-circuits |
| 06/13/1979 | EP0002225A1 Earth-leak circuit breaker reacting upon earth leak AC, portions of earth leak DC, as well as smooth earth leak DC |
| 06/12/1979 | CA1056508A1 Function generator |
| 06/12/1979 | CA1056448A1 Overload protection system for three-phase submersible pump motor |
| 06/05/1979 | US4157522 Electrical melting fuse combined with a Peltier element |
| 06/05/1979 | US4157520 Magnetic flux shifting ground fault trip indicator |
| 06/05/1979 | US4157496 Circuit for testing protection devices |
| 06/05/1979 | CA1056012A1 Phase failure detection circuit for multiphase systems |
| 05/29/1979 | US4156885 Automatic current overload protection circuit for electrostatic precipitator power supplies |
| 05/29/1979 | US4156884 Ground fault protection system for industrial power circuits |
| 05/29/1979 | CA1055595A1 Circuit breaker with solid state passive overcurrent sensing device |
| 05/22/1979 | US4156280 Utility monitor for detecting and storing power line disturbances |
| 05/22/1979 | US4156263 Hazardous voltage protector for telephone line |
| 05/22/1979 | US4156262 Overload-protection circuit for electric motors |
| 05/22/1979 | US4155427 Elevator system |
| 05/22/1979 | CA1055142A1 Zener diode effect long acceleration module |
| 05/08/1979 | US4153924 Inrush current restraint circuit for alternating power system switch |
| 05/02/1979 | EP0001722A2 Fast high voltage on-off switch with possibility of voltage regulation, load- and self- protection |
| 05/01/1979 | US4152744 Solid state tripping circuit |
| 05/01/1979 | US4152656 Apparatus for monitoring an AC variable |
| 05/01/1979 | US4152576 Low voltage welding circuit with non-conductive ground connector |
| 04/24/1979 | US4151460 High resistance ground fault detector and locator for polyphase electrical systems |
| 04/24/1979 | CA1053298A1 Magnetic flux shifting ground fault trip indicator |
| 04/17/1979 | US4150411 Ground fault circuit interrupter utilizing a single transformer |
| 04/17/1979 | US4150339 Temperature insensitive DC voltage detection and protection circuit |
| 04/10/1979 | US4149210 Electrical apparatus including interlocking circuit for short-time delay and long-time delay tripping |
| 04/10/1979 | US4149208 Method of and apparatus for ground fault protection of generators connected in parallel |
| 04/03/1979 | US4148089 Voltage surge protector |
| 04/03/1979 | US4148088 Electronic circuit breaker |
| 04/03/1979 | US4148087 Distance relay for electric power transmission lines |
| 04/03/1979 | US4148024 Capacitively coupled indicator for a submersible fuse |
| 03/27/1979 | US4146913 Symmetrical component sequence filter |
| 03/22/1979 | WO1979000127A1 Defect current protection switch,reacting to double biased direct defect currents |
| 03/20/1979 | CA1051092A1 Indicating apparatus |
| 03/13/1979 | US4144551 Power interrupter device for an electrical distribution system |
| 03/08/1979 | WO1979000105A1 Protective circuit-breaker operated by leakage current |
| 03/07/1979 | EP0001003A2 Apparatus and method for operating a dynamo-eletric machine |
| 03/06/1979 | US4143410 Electric power system control utilizing low level signals and miniature gage wiring |
| 03/06/1979 | CA1050101A2 Line surge protection device for telephone lines |
| 02/27/1979 | CA1049610A1 Protection circuit for battery powered electronic devices |
| 02/20/1979 | CA1049131A1 Active impedance multiplier |
| 02/20/1979 | CA1049097A1 Cross-field ground fault sensor |
| 02/13/1979 | US4139878 Apparatus for sensing a high phase signal from a multi-phase AC load circuit |
| 02/13/1979 | CA1048604A1 Ground fault circuit interrupter |
| 02/07/1979 | EP0000585A1 Automatic control system for processing signals from an overheat monitor of a dynamoelectric machine |
| 02/06/1979 | US4138707 Ground fault protective systems with predetection neutralization of reactive currents |
| 02/06/1979 | US4138705 Over-power safety device for motor driven system |
| 02/06/1979 | CA1048136A1 Ground fault receptacle |
| 01/30/1979 | US4137557 Automatic cut-out device |
| 01/30/1979 | US4137556 Protection circuit for a data transmission system |
| 01/16/1979 | US4135223 Electronic protection circuit |
| 01/16/1979 | US4135222 Fault current protection switch |
| 01/16/1979 | US4135129 Ground fault circuit interruptor test apparatus |
| 01/16/1979 | CA1046623A1 Sequential resetting circuit interrupter |
| 01/09/1979 | US4133413 Elevator safety device |
| 01/09/1979 | CA1046157A1 Ground fault interrupter with improved means for grounded neutral detection |
| 01/02/1979 | US4132085 Control apparatus including an electronic timer |
| 12/26/1978 | US4131929 Bridge circuits for sensing currents in a three-phase A.C. circuit |
| 12/19/1978 | US4130851 Directional relays |
| 12/19/1978 | US4130850 High speed fault diverter switch for gas-insulated systems |
| 12/19/1978 | CA1044795A1 Sensing amplifier and trip circuit particularly for ground fault circuit interrupter |