| Patents for H02H 7 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions (32,726) |
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| 11/06/1979 | US4173774 Parallel AC electrical system with differential protection immune to high current through faults |
| 11/06/1979 | CA1065964A1 Digital logic control system for three-phase submersible pump motor |
| 10/30/1979 | USRE30134 Protection of polyphase equipment |
| 10/30/1979 | CA1065448A1 Compressor motor protector |
| 10/30/1979 | CA1065403A1 Power interruption safeguard apparatus |
| 10/23/1979 | CA1065042A1 Contactor device including arc suppression means |
| 10/16/1979 | US4171533 Low voltage protection circuit for induction motors |
| 10/16/1979 | US4171510 System for detecting output of controllable semiconductor device |
| 10/09/1979 | CA1063884A1 Device for indicating overheating in generators |
| 09/25/1979 | CA1063226A1 Multi-function solid state trip unit with trip indicating means |
| 09/25/1979 | CA1063225A1 Ground fault protective apparatus and method |
| 09/18/1979 | US4168514 Combination circuit breaker-lightning arrestor |
| 09/18/1979 | CA1062769A1 Field protector for synchronous machines |
| 09/11/1979 | CA1062332A1 Control circuit for a power switching element |
| 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 |
| 09/04/1979 | CA1061855A1 Transformer protective system |
| 08/28/1979 | US4165801 Static Leonard system |
| 08/28/1979 | CA1061406A1 Frequency converter, commutation short circuit protection |
| 08/28/1979 | CA1061403A1 Induction motor brake circuit |
| 08/21/1979 | CA1060981A1 Fail-safe circuit |
| 08/21/1979 | CA1060979A1 Method and apparatus for a power circuit breaker controller |
| 08/21/1979 | CA1060947A1 Discharge gap device |
| 08/14/1979 | US4164785 Multiphase to single phase and frequency converter system |
| 08/14/1979 | US4164773 Transfer trip circuit with pilot wire monitoring |
| 08/14/1979 | US4164705 Brushless exciter fault indicator system |
| 08/07/1979 | US4163999 Electronic output circuit for vacuum cleaners |
| 07/31/1979 | US4163270 Safety apparatus for use with a three-phase AC motor |
| 07/31/1979 | US4163227 Apparatus for monitoring arcing of brushes in a dynamoelectric machine |
| 07/31/1979 | CA1059629A1 Overtemperature protective circuit for switching devices |
| 07/24/1979 | US4162526 Failsafe primary power control apparatus for systems using computer controlled power sequencing |
| 07/17/1979 | US4161759 Protection circuit for a voltage regulator |
| 07/17/1979 | US4161681 Prime mover, method of operating such and circuit |
| 07/17/1979 | CA1058740A1 Static overcurrent relay |
| 07/17/1979 | CA1058694A1 Discharge gap device |
| 07/10/1979 | US4161027 Digital protection system for transmission lines and associated power equipment |
| 07/10/1979 | US4160908 Particulate enhancement for generator condition monitors |
| 07/10/1979 | CA1058281A1 Protective device for series capacitor |
| 06/19/1979 | US4158814 Automatic overload protection system |
| 06/19/1979 | CA1056910A1 Method and apparatus for detection of short-circuits |
| 06/19/1979 | CA1056909A1 Apparatus for localization of a line fault |
| 06/19/1979 | CA1056908A1 Method and apparatus for locating a fault on a line |
| 06/12/1979 | CA1056452A1 Gas turbine power plant control apparatus including a load control system |
| 06/12/1979 | CA1056448A1 Overload protection system for three-phase submersible pump motor |
| 06/05/1979 | US4157087 Peripheral nerve stimulator |
| 06/05/1979 | CA1056050A1 Over voltage protection circuit |
| 06/05/1979 | CA1056036A1 Door control circuit |
| 06/05/1979 | CA1056015A1 Method for locating a fault on a line |
| 06/05/1979 | CA1056012A1 Phase failure detection circuit for multiphase systems |
| 06/05/1979 | CA1056011A1 Apparatus for localization of a line fault |
| 06/05/1979 | CA1056010A1 Reverse voltage surge protection for high-voltage thyristors |
| 06/05/1979 | CA1056008A1 Fast operating overload switching circuit for universal motors |
| 05/29/1979 | US4156885 Automatic current overload protection circuit for electrostatic precipitator power supplies |
| 05/29/1979 | US4156846 Detection of arcing faults in generator windings |
| 05/22/1979 | US4156274 Inverter circuit |
| 05/22/1979 | US4156262 Overload-protection circuit for electric motors |
| 05/22/1979 | US4156172 Main field current transient control circuit for dynamoelectric machines |
| 05/16/1979 | EP0001831A2 Apparatus protected against electric current short circuits |
| 05/15/1979 | US4155107 Generator earth fault protection |
| 05/15/1979 | CA1054701A1 Protection means for objects included in electrical power supply networks |
| 05/15/1979 | CA1054669A1 Permanent magnet motor overload protection |
| 05/08/1979 | US4153921 Cooling by vaporization and condensation of fluids |
| 05/08/1979 | CA1054225A1 Phase sequence detector for three-phase ac power system |
| 05/08/1979 | CA1054221A1 Current regulation system for three-phase load |
| 05/08/1979 | CA1054218A1 Circuit arrangement for protecting thyristors |
| 05/08/1979 | CA1054217A1 Battery isolator |
| 05/01/1979 | US4152636 Fast de-excitation brushless exciter |
| 05/01/1979 | US4151712 Protective shutdown system for combined cycle plant having a dual liquid fuel system |
| 05/01/1979 | CA1053750A1 Interruption-free power supply |
| 04/24/1979 | US4151576 Transformer secondary disconnect and shorting switch |
| 04/24/1979 | US4151575 Motor protective device |
| 04/24/1979 | US4151519 Protective circuit for compass repeater amplifier systems |
| 04/24/1979 | US4151450 Protective means for feeder of machinery with DC-motor |
| 04/24/1979 | CA1053359A2 Protective relaying apparatus of the unblock type |
| 04/24/1979 | CA1053327A1 Holding circuit for static converter valves |
| 04/17/1979 | US4150325 Power conversion system having inversion fault detection and correction circuit |
| 04/17/1979 | CA1052703A1 Central station for power line access data system |
| 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 | US4148088 Electronic circuit breaker |
| 04/03/1979 | US4147964 Complementary latching disabling circuit |
| 03/27/1979 | US4146829 Battery dissipation limiter circuit |
| 03/27/1979 | US4146801 Apparatus for protecting power transistors in an h configuration power amplifier |
| 03/20/1979 | US4145728 Roller belt controls |
| 03/20/1979 | CA1051089A1 Inverter control circuit |
| 03/07/1979 | EP0001003A2 Apparatus and method for operating a dynamo-eletric machine |
| 03/06/1979 | US4142375 Control apparatus for air conditioning unit |
| 02/27/1979 | US4142151 Failed diode indicator |
| 02/27/1979 | CA1049610A1 Protection circuit for battery powered electronic devices |
| 02/20/1979 | US4139935 Over voltage protective device and circuits for insulated gate transistors |
| 02/13/1979 | US4139788 Test circuit for indication of deviation of source voltages from their set points |
| 02/13/1979 | US4139780 Multi-channel generator drive system |
| 02/13/1979 | CA1048600A1 Ground fault circuit interrupting module |
| 02/07/1979 | EP0000585A1 Automatic control system for processing signals from an overheat monitor of a dynamoelectric machine |
| 02/06/1979 | US4138706 Electrical power supply fault detecting system |
| 02/06/1979 | US4138630 Electric motor reversing control system |
| 01/23/1979 | US4136323 Miniature motor protector |
| 01/16/1979 | US4134698 Compact fail-safe buzzer |
| 01/16/1979 | CA1046577A1 Station protector with a three-electrode gas tube arrester |
| 01/09/1979 | US4134025 Electric switch arrangement for use as a current supply switching means for a bipolar electric load |