| 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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| 10/26/1983 | EP0092205A2 Composite circuit breaker |
| 10/25/1983 | US4412266 AC Electrical device protective thermal relay |
| 10/25/1983 | US4412169 Circuit for detecting and indicating faults and operating anomalies in a system for recharging electric accumulators |
| 10/25/1983 | CA1155950A1 Digital control system for electric motors in power tools and the like |
| 10/18/1983 | US4410935 Current overload protection for inverter of uninterruptible power supply system |
| 10/18/1983 | US4410924 Motor protection control circuit |
| 10/11/1983 | US4409648 Apparatus for preventing phase control mechanism malfunction |
| 10/11/1983 | US4409636 Device for detecting faulty phases in a multi-phase electrical network |
| 10/11/1983 | US4409635 Electrical power system with fault tolerant control unit |
| 10/11/1983 | US4409542 Monitoring system for an LC filter circuit in an AC power network |
| 10/05/1983 | EP0090716A1 Clothes washer with a reduced-power motor for driving the drum |
| 10/05/1983 | EP0090412A2 Current-generating device, particularly for preserving volatile random access memories |
| 10/04/1983 | US4408246 Protective relay apparatus |
| 10/04/1983 | US4408244 Circuit safe against overload for varying the amount of power to an electric blower motor |
| 09/27/1983 | US4406979 Fail-safe system for pulse-controlled three-terminal d.c. motor |
| 09/20/1983 | US4405963 Capacitor apparatus with an individual discharge damping device for each capacitor unit |
| 09/20/1983 | CA1154087A1 High voltage converter apparatus having overvoltage protection circuits for thyristors |
| 09/20/1983 | CA1154056A1 Undervoltage release reset and lockout apparatus |
| 09/14/1983 | EP0088312A2 H-switch circuit with an overcurrent protection circuit |
| 09/13/1983 | US4404612 DC Solid state overload relay |
| 09/07/1983 | EP0087697A1 Multiple inverter |
| 09/07/1983 | EP0087424A1 Inverter connection with bridge for transforming direct current into single phase or multiphase alternating current. |
| 08/30/1983 | US4402030 Electrostatic voltage control circuit |
| 08/30/1983 | US4402028 Protective relay methods and apparatus |
| 08/30/1983 | US4401942 Monitoring system for a capacitor battery in an AC voltage network |
| 08/30/1983 | CA1153087A1 Automatic door control apparatus |
| 08/24/1983 | EP0086267A1 Electropneumatic door control |
| 08/23/1983 | US4400755 Overvoltage protection circuit |
| 08/23/1983 | US4400661 Voltage regulation and battery dissipation limiter circuit |
| 08/23/1983 | CA1152556A1 Protective device for current transformer |
| 08/17/1983 | EP0086119A1 Electric geared motor in particular for displacing movable elements of an automotive vehicle |
| 08/16/1983 | CA1152195A1 Anti-kickback power tool control |
| 08/10/1983 | EP0085202A1 Protection switch |
| 08/09/1983 | US4398231 Solid-state electronic brush speed sensing control |
| 08/09/1983 | US4398141 Static VAR generators |
| 08/04/1983 | WO1983002692A1 Remotely controlled valve |
| 08/02/1983 | CA1151279A1 Solid state trip unit for an electrical circuit breaker |
| 08/02/1983 | CA1151265A1 Compressor motor unit and a method of troubleshooting power supply circuits therefor |
| 08/02/1983 | CA1151240A1 Thyristor switch with transient protection and rf interference suppression |
| 07/27/1983 | EP0084245A1 Overcurrent limiter circuit for switching regulator power supplies |
| 07/27/1983 | EP0084191A1 Method of fault detection in a conductor of an interconnection network |
| 07/20/1983 | EP0083947A1 Process for monitoring a driven moving door or the like |
| 07/20/1983 | EP0083772A1 Protective relay apparatus |
| 07/19/1983 | US4394724 Propulsion motor control apparatus and method |
| 07/19/1983 | US4394614 Static VAR generators |
| 07/19/1983 | US4394607 Control systems for gates and the like including a motor overload monitoring circuit |
| 07/19/1983 | US4394605 Load drive control system |
| 07/19/1983 | CA1150350A1 Field coil fault detector for automotive alternator battery charging systems |
| 07/12/1983 | US4393442 Procedure and means for monitoring current data in a thyristor-controlled direct current drive |
| 07/12/1983 | US4393429 Superconductive coil system with protecting device |
| 07/12/1983 | US4393342 Door operation control apparatus |
| 07/12/1983 | CA1149871A1 Earth contact monitoring device for a polyphase three-phase filter circuit |
| 07/06/1983 | EP0083097A1 Protective relay for power system |
| 07/05/1983 | US4392173 Circuit for reducing voltage stress across a transformer |
| 06/29/1983 | EP0082493A2 Control circuit for short-circuit-proof output stages |
| 06/28/1983 | US4390871 Circuit for detecting reduction in power |
| 06/22/1983 | EP0082103A1 Method and arrangement for realising the detection of earth faults in an electric-energy distribution network |
| 06/22/1983 | EP0081864A1 Polarity guard circuit |
| 06/22/1983 | EP0081687A1 Switch arrangements for devices for parallel alternating current remote feeding |
| 06/21/1983 | CA1148634A1 Reversing mechanism for an automatic door opener |
| 06/14/1983 | US4388664 Apparatus for protecting vacuum interrupter type on-line tap changer |
| 06/07/1983 | CA1147839A1 Method for switching in a three-phase high voltage circuit |
| 06/07/1983 | CA1147779A1 Circuit breaker electrical closure control apparatus |
| 06/07/1983 | CA1147575A1 Method and apparatus for diagnosing overheating of an electric machine |
| 05/31/1983 | US4386398 Automatic door control apparatus |
| 05/31/1983 | CA1147445A1 System of protection against short circuits and fulminations |
| 05/31/1983 | CA1147384A1 Filter input protection |
| 05/24/1983 | US4385337 Circuit including an MOS transistor whose gate is protected from oxide rupture |
| 05/24/1983 | US4385271 Fault monitoring by detecting a polarity difference |
| 05/24/1983 | US4385241 A.C. Electricity power supply system and methods of and apparatus for load control thereon |
| 05/24/1983 | CA1147016A1 Overload safety device for a motor |
| 05/18/1983 | EP0078985A1 Internal voltage grading and transient voltage protection for power transformer windings |
| 05/17/1983 | US4384312 Line break protection for multispeed motor |
| 05/17/1983 | US4384248 Method and apparatus for detecting shortcircuit in arm of GTO inverter |
| 05/17/1983 | US4384246 Series-thyristor subsynchronous damper for power generators |
| 05/17/1983 | US4384241 Sewing machine drive |
| 05/11/1983 | EP0078517A2 Protective relay system and sampling synchronizing method therefor |
| 05/11/1983 | EP0022834B1 Improvement relating to voltage capacitive transformers |
| 05/10/1983 | US4383206 Door operation control apparatus |
| 05/04/1983 | EP0078183A2 Determining locations of faults in power transmission lines |
| 05/03/1983 | CA1145837A1 Ground fault trip mode network for static trip circuit breakers |
| 04/26/1983 | US4381531 Alternating current motor protection system |
| 04/26/1983 | CA1145394A1 Controlled current inverter system having semiconductor overvoltage protection |
| 04/26/1983 | CA1145392A1 Method and apparatus for a variable frequency inverter system having communication fault detection and correction capabilities |
| 04/19/1983 | US4380785 Solid state trip unit for an electrical circuit breaker |
| 04/14/1983 | WO1983001351A1 Voltage regulation and battery dissipation limiter circuit |
| 04/12/1983 | US4380045 Thyristor convertor failure detection device |
| 04/12/1983 | US4379986 Stall sensing circuit for shaded pole motors |
| 04/12/1983 | US4379985 Bipolar driver with illegal code detector |
| 04/06/1983 | EP0075931A2 Fail-safe system in a power regulation circuit for an automotive electronic circuit |
| 03/29/1983 | US4378586 Protective circuitry for semiconductor switches |
| 03/29/1983 | US4378580 Conduction limit protection arrangement for power transistor switch |
| 03/22/1983 | US4377837 Circuit interrupter with overtemperature trip device |
| 03/22/1983 | US4377835 Recovery protection device for a thyristor valve |
| 03/22/1983 | US4377834 Multiphase blocking circuitry for electrical power supply networks |
| 03/22/1983 | US4377784 Fault detection apparatus for rotor winding of rotary machine |
| 03/22/1983 | US4377731 Device for automatically interrupting the supply of electric power to a motor and its utilization |
| 03/22/1983 | CA1143430A1 Bipolar driver with illegal code detector |
| 03/17/1983 | WO1983000958A1 Inverter connection with bridge for transforming direct current into single phase or multiphase alternating current |
| 03/16/1983 | EP0074186A1 Current limiting device |