| 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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| 06/19/1987 | DE3543948A1 Arrangement for detecting fault currents |
| 06/18/1987 | WO1987003548A1 Adaptive switching circuit |
| 06/17/1987 | CN86203923U Selective leakage detecting relay |
| 06/17/1987 | CN86202663U Safety electric source device |
| 06/16/1987 | US4674002 Directional comparison blocking system |
| 06/16/1987 | US4673928 Fuse cap warning light |
| 06/11/1987 | DE3604118A1 Personenschutzschaltung fuer elektrische geraete Personal Protective circuit for electrical equipment at |
| 06/10/1987 | EP0225092A2 Circuit arrangement for protecting a CRT and associated circuitry from damage due to arcing |
| 06/10/1987 | EP0225007A2 Improved control circuit for a circuit interrupter |
| 06/10/1987 | EP0225006A2 Improved current-sensing arrangement and method for a circuit-interrupter control circuit |
| 06/10/1987 | EP0224749A1 Digital fault locator |
| 06/10/1987 | EP0224557A1 A ground fault circuit interrupter with an additional current-sensing element |
| 06/10/1987 | CN86106879A Automatic ground fault protection for an electric power system |
| 06/09/1987 | US4672524 Overcurrent and overvoltage protected transistor inverter |
| 06/09/1987 | US4672523 Protective device for a load connected to a power supply line of an electric power system |
| 06/09/1987 | US4672501 Circuit breaker and protective relay unit |
| 06/09/1987 | US4672500 Protective device for electrostatic sprayer equipment |
| 06/04/1987 | WO1987003429A1 Apparatus and method for protecting an electrical circuit |
| 06/03/1987 | EP0224089A1 Information data output device for electric-power systems |
| 06/02/1987 | US4670830 Method and apparatus for the protection of converter equipment with GTO thyristors against short circuit |
| 06/02/1987 | US4670811 Differential-type protective relay |
| 06/02/1987 | US4670742 Monitoring system for the trigger circuit of an electrical power switch |
| 05/27/1987 | EP0223128A1 Resistance to ground checker |
| 05/27/1987 | DE3541273A1 Converter having a control and regulating device |
| 05/27/1987 | CN86107740A Signal conditioning circuit for electronic trip circuit interrupters |
| 05/27/1987 | CN86106405A Information data output arrangements for electric power system |
| 05/20/1987 | EP0222688A2 Device for remote-controlled modification of tripping values of a switchgear and procedure for converting a switchgear |
| 05/19/1987 | US4667262 Device for detecting a ground fault in the rotor winding of an electric machine |
| 05/14/1987 | DE3540296A1 Arrangement for damping capacitive fault currents |
| 05/13/1987 | EP0221775A1 Testable voted logic power circuit and method of testing the same |
| 05/13/1987 | EP0221185A1 Electronic overcurrent relay |
| 05/13/1987 | CN86202874U Automatic monitoring safety socket |
| 05/12/1987 | US4665459 Method and circuit for dissipating stored inductive energy |
| 05/07/1987 | WO1987002836A1 Intertripping system |
| 05/07/1987 | WO1987002835A1 Device and method of protecting circuits against changes in operating conditions |
| 05/07/1987 | DE3539265A1 Control circuit |
| 05/06/1987 | EP0220831A2 Styryloxy resins and polymerization process |
| 05/06/1987 | EP0220408A1 Self-monitoring fault current breaker |
| 05/06/1987 | EP0220215A1 Fault-current protection switch for a.c. and d.c. fault currents without energy storage |
| 05/05/1987 | US4663691 Safety mechanism for electrical power line |
| 05/05/1987 | US4663690 Residual differential device equipped with a surveillance system for the electronic power supply |
| 05/05/1987 | US4663537 Protective circuit |
| 04/29/1987 | EP0219790A1 Transformer protection system |
| 04/29/1987 | CN86206464U Series-parallel switch for automobile and tractor accumulator circuit |
| 04/28/1987 | US4661910 Protection circuit for detecting undervoltages in the electrical charging system of a motor vehicle |
| 04/28/1987 | US4661880 Failsafe monitoring system with input controlled switch circuits |
| 04/23/1987 | WO1987002523A1 Apparatus and method for protecting a motor control circuit |
| 04/23/1987 | DE3537029A1 Circuit breaker responsive to leakage current - has saturable current transformer and transductor current transformer with sec. winding supplied HF core-biassing current |
| 04/22/1987 | EP0219074A2 Two-wire type switch with a power transistor |
| 04/14/1987 | US4658323 RMS calculation circuit for digital circuit interrupters |
| 04/09/1987 | WO1987001902A2 Protective circuit for electric apparatus |
| 04/08/1987 | EP0216894A1 Electronic fuse. |
| 04/08/1987 | EP0216816A1 Circuit for dissipating stored inductive energy. |
| 04/07/1987 | USH248 Fuse status indicator system |
| 04/01/1987 | EP0216576A2 Fault detecting device for welded pipe joints |
| 04/01/1987 | EP0216358A2 Power cut detection apparatus for power converter |
| 04/01/1987 | EP0215969A1 A ciruit arrangement for sensing, transmitting, and processing information of the occurrence of a variation in a parameter of AC electric equipment to be monitored |
| 04/01/1987 | CN86206724U Domestic electricity supply controller |
| 04/01/1987 | CN86205158U Electrical shock and leakage protector with over voltage protection |
| 03/31/1987 | US4654806 Method and apparatus for monitoring transformers |
| 03/31/1987 | US4654617 Magnetic circuit control apparatus |
| 03/25/1987 | EP0215620A2 DC ground fault detection |
| 03/24/1987 | US4652965 High level magnetic trip circuit |
| 03/24/1987 | US4652962 High speed current limiting circuit interrupter |
| 03/18/1987 | EP0214484A1 Digital protective relay apparatus |
| 03/18/1987 | EP0214483A1 Method for measuring distance in digital distance relays |
| 03/18/1987 | CN86103944A Domestical electric power limiter |
| 03/11/1987 | EP0213635A2 Transistor inverter |
| 03/11/1987 | CN85205773U Electrical theftproof security equipment |
| 03/10/1987 | US4649455 Rating plug for molded case circuit breaker |
| 03/10/1987 | US4648496 Clutch control system for a continuously variable transmission |
| 03/10/1987 | CA1219069A1 Low voltage protection circuit |
| 03/04/1987 | CN86204342U Domestic guard theft electronic arrangement |
| 03/04/1987 | CN86201239U Automatic protective socket for leakage of electricity (three-phase part) |
| 02/25/1987 | EP0211507A1 Load-dependent current limiter for the power supply of a multi-module electronia system |
| 02/24/1987 | CA1218445A1 Shock hazard protection system |
| 02/19/1987 | DE3528148A1 Safety device for a mobile and/or stationary standby-power generator |
| 02/18/1987 | CN86201251U Automatic cutting-off device for using electricity against regulations |
| 02/18/1987 | CN86104518A Ground fault receptacle with compact component arrangement |
| 02/17/1987 | US4644438 Current-limiting circuit breaker having a selective solid state trip unit |
| 02/17/1987 | CA1218108A1 Surge arrester equipped for monitoring functions and method of use |
| 02/11/1987 | CN86100047A Multi-function overload switch for 3-phase power supply |
| 02/10/1987 | US4642724 Trip signal generator for a circuit interrupter |
| 02/10/1987 | US4642616 Method and apparatus for detection of AC power failure conditions |
| 02/10/1987 | US4642564 Measuring circuit and method for power distribution equipment |
| 02/05/1987 | DE3526177A1 Rberspannungs-schutzschaltung Rberspannungs-protection circuit |
| 02/04/1987 | CN85104228A Multifunctional automatical contactor |
| 02/03/1987 | US4641218 Protector with circuit disabler |
| 02/03/1987 | US4641217 Two pole ground fault circuit breaker |
| 02/03/1987 | US4641088 Root mean square measuring device for negative sequence current |
| 02/03/1987 | US4641079 Battery voltage regulating system |
| 02/03/1987 | US4641067 Motor control method and apparatus therefor |
| 01/29/1987 | WO1987000700A1 Over-voltage protection circuit |
| 01/28/1987 | EP0210093A1 Method and device for monitoring the transmission of signals of a differential protection relay |
| 01/28/1987 | EP0210060A2 Power supply apparatus |
| 01/28/1987 | EP0209973A1 Protection arrangement for a telephone subscriber line interface circuit |
| 01/28/1987 | EP0209765A1 Electrical distribution installation |
| 01/24/1987 | CN86102566A Multifunctional control circuit with overcurrent protection |
| 01/21/1987 | CN86202855U Voltage type protector for electric appliance |
| 01/21/1987 | CN86104528A Arcless circuit interrupter |