| 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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| 02/18/1998 | CN1173755A Overcurrent protection circuit |
| 02/17/1998 | US5719736 Heat flow detector for recessed incandescent fixtures |
| 02/17/1998 | US5719732 Overload protecting device |
| 02/17/1998 | US5719489 Apparatus for determining load currents |
| 02/17/1998 | CA2054487C Ptc element |
| 02/12/1998 | WO1998006111A1 Surge diverter |
| 02/12/1998 | DE19633527A1 Remote protection/branch protection method for power transmission line arc shorting |
| 02/11/1998 | EP0823764A2 Process for checking the operation and for determining the trip current of residual current breakers responsive to dc or any current |
| 02/11/1998 | EP0822908A1 Continuous input cell for data acquisition circuits |
| 02/11/1998 | EP0822907A1 Ac input cell for data acquisition circuits |
| 02/11/1998 | CN2274384Y Auxiliary power-supply for leakage protector |
| 02/11/1998 | CN2274383Y Double-screen digital-displaying voltage relay |
| 02/11/1998 | CN1173061A Protection system for power receiving station |
| 02/11/1998 | CN1173035A Earth leakage breaker |
| 02/10/1998 | US5716725 Method apparatus for indicating improper coupling of a power source to an electronic device |
| 02/05/1998 | WO1998005050A1 Circuit arrangement for reducing transients caused by an electromechanical switch with overcurrent protection |
| 02/05/1998 | DE19630989A1 Optical differential protection arrangement e.g. for HV power distribution equipment |
| 02/04/1998 | EP0822635A2 Protection system for power receiving station |
| 02/04/1998 | EP0821842A1 Differential protection device sensitive to pulsating current |
| 02/04/1998 | EP0821830A1 Current transformer, in particular for a fault current tripping device sensitive to pulsating currents and tripping device equipped with such a transformer |
| 02/04/1998 | CN2273912Y Lightning protection device of household apptiance |
| 02/04/1998 | CN2273911Y Power supply control device for uninterruption at low voltage self-cutting off tramsformer |
| 02/04/1998 | CN1172374A Circuit breakers |
| 02/03/1998 | US5715129 Electronic overload relay having intrinsic power supply operable from power applied to contactor coil |
| 02/03/1998 | US5715127 Method for preventing electrostatic discharge failure in an integrated circuit package |
| 02/03/1998 | US5715125 Intelligent ground fault circuit interrupter |
| 02/03/1998 | US5714886 Method of calibrating the trip point of an overload relay |
| 02/03/1998 | US5714877 Apparatus for detecting the amplitude and phase of an A.C. signal |
| 01/28/1998 | EP0820651A1 Arcing fault detection system |
| 01/28/1998 | EP0759175A4 Microcontroller with brown-out detection |
| 01/28/1998 | EP0721687B1 Method and device for identifying single ground faults |
| 01/28/1998 | EP0650615B1 A fault-tolerant computer system |
| 01/27/1998 | US5712755 Surge suppressor for radio frequency transmission lines |
| 01/27/1998 | US5712572 Insulation state measurement method, insulation state judgement apparatus, and dispersion type power generating system using the same |
| 01/27/1998 | CA2063522C Voltage detector for producing output signal without transient error level |
| 01/22/1998 | WO1998002948A1 Circuitry for a high-voltage cable installation |
| 01/22/1998 | WO1998002947A1 Circuit protection arrangements |
| 01/22/1998 | WO1998002946A1 Circuit protection arrangements |
| 01/22/1998 | WO1997045933A3 A method and a device for reducing third harmonic phenomena in a rotating electric alternating current machine |
| 01/22/1998 | WO1997045926A3 An electric high voltage ac machine |
| 01/22/1998 | WO1997045921A3 Electromagnetic device |
| 01/22/1998 | DE19629483A1 Monitoring system for electrical machine star-connected stator windings |
| 01/22/1998 | CA2263747A1 Circuit protection arrangements |
| 01/22/1998 | CA2263073A1 Circuit protection arrangements |
| 01/21/1998 | EP0820135A1 Static self-holding micro-switch |
| 01/21/1998 | EP0819328A1 A.c. power cut-off device |
| 01/21/1998 | EP0691046B1 Arrangement for disconnecting branches of a low voltage supply network under short circuit conditions |
| 01/21/1998 | CN2273070Y Multifunctional electricity-saving protective circuit arrangement for avoiding fraudulent use of power |
| 01/21/1998 | CN2273069Y Over-temp alarm and protection switch for main power switch |
| 01/21/1998 | CN2273049Y Multifunctional protective switch for electric appliances |
| 01/21/1998 | CN1171173A Electrical protective switch |
| 01/20/1998 | US5710691 For protecting an appliance receiving power from a household power socket |
| 01/20/1998 | US5710690 Method and apparatus for protecting an integrated circuit from current overload |
| 01/20/1998 | US5710408 Automatic controlled for an ice and snow melting system with ground fault circuit interruption |
| 01/15/1998 | WO1997045907A3 Rotating electrical machine plants |
| 01/15/1998 | DE19729168A1 Fault current circuit breaker e.g. for interrupting heavy earth (return) current and leakage currents |
| 01/15/1998 | DE19629481A1 Schaltungsanordnung für eine Hochspannungskabelanlage Circuit arrangement for a high voltage cable system |
| 01/14/1998 | EP0818865A2 Limit switch |
| 01/14/1998 | EP0755581B1 Overvoltage protection |
| 01/14/1998 | CN1170480A Circuit and process for operating adjusting drive |
| 01/14/1998 | CN1170479A Circuit for detecting overload in adjusting drive |
| 01/13/1998 | US5708551 Electrical distribution device with preventive checking of the state of the load, particularly for civil and industrial users |
| 01/13/1998 | US5708548 Protection device for a spa pack |
| 01/07/1998 | EP0817346A1 Protection device against the effects of internal faults in an electrical apparatus |
| 01/07/1998 | EP0815630A1 Electrical differential protection apparatus with a test circuit |
| 01/07/1998 | EP0815629A1 Delayed-action fault current of differential current circuit-breaker |
| 01/07/1998 | CN2272161Y Remote interphase short-circuit protection |
| 01/07/1998 | CN1169619A Microprocessor based motor control system with phase difference detection |
| 01/06/1998 | US5706155 Ground fault circuit interrupter incorporating miswiring prevention circuitry |
| 01/06/1998 | US5706153 Programmer for starter |
| 01/06/1998 | US5705904 Frequency converter device which adaptively responds to a power failure |
| 01/02/1998 | DE19624567A1 Current-limiting motor starter combination with motor protection switch |
| 12/31/1997 | WO1997050163A1 Surge-resistant relay switching circuit |
| 12/31/1997 | CN2271775Y Thyratron transistor electric controller |
| 12/31/1997 | CN2271767Y Directly-plugging overvoltage protector for household electrical appliances |
| 12/31/1997 | CN2271766Y Multifunctional fireproof safety mains controller |
| 12/30/1997 | US5703746 Electric junction box and electric current distribution system |
| 12/30/1997 | US5703745 System for detection of transients from a coupling capacitor voltage transformer used in a protective relay |
| 12/30/1997 | US5703459 Driver for an induction motor |
| 12/29/1997 | EP0814555A1 Differential protection device |
| 12/29/1997 | EP0814395A2 Overcurrent sensing circuit for power mos field effect transistor |
| 12/23/1997 | US5701226 Apparatus and method for distributing electrical power |
| 12/23/1997 | US5701080 Method of improving fault current measurement accuracy on electronic reclosure control |
| 12/23/1997 | US5701070 Electrical generator damage protection apparatus and method with circuit breaker trip initiation |
| 12/17/1997 | EP0813283A1 Differential protection device having immunity against nuisance tripping |
| 12/17/1997 | EP0813282A1 Ground fault detection apparatus for a device connected to a power distribution or transmission network, and corresponding method |
| 12/17/1997 | CN1167994A Protective relay having out-of-step logic capability |
| 12/16/1997 | US5699239 Power supply control circuit |
| 12/16/1997 | US5699222 Apparatus and method for programming and reviewing a plurality of parameters of electrical switching device |
| 12/16/1997 | US5699219 Ground fault current limiter and method of limiting ground fault current |
| 12/16/1997 | US5698887 Semiconductor protection circuit |
| 12/16/1997 | US5698097 Oil filter including replaceable primary and secondary flow filter elements |
| 12/10/1997 | EP0812048A2 Ground fault circuit interrupter |
| 12/10/1997 | EP0812047A2 Programmer for starter |
| 12/10/1997 | EP0811266A1 Undervoltage circuit breaker with an electromagnet |
| 12/10/1997 | CN2270305Y Intelligent temp-controlled switch |
| 12/10/1997 | CN2270303Y Three-phase open-phase protector |
| 12/10/1997 | CN2270302Y CATV multifunctional power supply unit |
| 12/10/1997 | CN2270301Y Remote-controller for electrical apparatus |
| 12/10/1997 | CN2270300Y Multipurpose controller |