| 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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| 08/18/1998 | US5796258 Adaptive quadrilateral characteristic distance relay |
| 08/18/1998 | US5796257 Detecting faults in power lines |
| 08/13/1998 | WO1998035418A1 Circuitry for operating an electronic tripping device in a circuit breaker |
| 08/13/1998 | WO1998029932A3 A device and a method for protecting an object against fault-related over-currents |
| 08/13/1998 | WO1998029928A3 Switching device including spark gap for switching electrical power, a method for protection of an electrical object and its use |
| 08/13/1998 | WO1998029927A3 Switching device including spark gap for switching electrical power, a method for protection of an electric object and its use |
| 08/13/1998 | DE19803919A1 Current interrupting switch unit with current interrupting switch contacts e.g. for protection of machine tool induction motors |
| 08/13/1998 | DE19706040A1 Schaltungsanordnung für den Betrieb eines elektronischen Auslösers eines Leistungsschalters Circuit arrangement for operating an electronic tripping device of a circuit breaker |
| 08/12/1998 | EP0858143A2 Monitoring device for mains-operated houshold devices |
| 08/12/1998 | EP0811266B1 Undervoltage circuit breaker with an electromagnet |
| 08/12/1998 | EP0782761B1 Differential current protective switch with special core material |
| 08/12/1998 | CN2287754Y Leakage protector for mine underwell low voltage electric network |
| 08/11/1998 | US5793596 Floating positive circuit breaker |
| 08/11/1998 | US5793595 Multi-application relay for power systems |
| 08/11/1998 | US5793590 Coaxial cable protection device |
| 08/11/1998 | US5793589 Circuit arrangement for current limiting |
| 08/11/1998 | US5793587 Dual trip level ground fault interrupter |
| 08/11/1998 | US5793171 Control circuit for controlling the driving of a DC motor for a mirror assembly of a vehicle |
| 08/06/1998 | WO1998034244A1 Winding in transformer or inductor |
| 08/06/1998 | WO1998033426A1 Dishwasher |
| 08/06/1998 | CA2380568A1 Dishwasher |
| 08/06/1998 | CA2278236A1 Winding in transformer or inductor |
| 08/05/1998 | EP0856929A2 Fault location arrangement in a power system |
| 08/05/1998 | EP0856739A1 Method for detecting short-circuit conditions and device which uses this method |
| 08/05/1998 | CN1189711A Sensitively cut-off protector |
| 08/04/1998 | US5790418 Adaptive polarizing memory voltage time constant |
| 08/04/1998 | US5790413 Plant parameter detection by monitoring of power spectral densities |
| 08/04/1998 | US5790356 Transformer protection system for protecting source transformers from ill effects of zero-sequence currents |
| 08/04/1998 | US5790355 Electric appliance |
| 08/04/1998 | US5789928 Circuit and method for discriminating the source of waveform distortion in an electric power generation and distribution system |
| 07/30/1998 | WO1998033099A1 System and method for providing backup protection in a power substation |
| 07/30/1998 | CA2276466A1 System and method for providing backup protection in a power substation |
| 07/29/1998 | EP0855779A2 Earth fault protection device |
| 07/29/1998 | EP0855778A2 Mains isolator |
| 07/29/1998 | CN2286937Y Over-voltage protection device for distribution power supply |
| 07/29/1998 | CN1188894A Differential pressure divided-flow detection circuit and appliedd circuit |
| 07/28/1998 | US5786971 Ground fault protection circuit for multiple loads with separate GFCI branches and a common neutral for the GFCI electronics |
| 07/28/1998 | US5786970 Stabilized power source circuit and IC incorporating the same |
| 07/28/1998 | US5786699 Test method and apparatus for testing a protective relay system |
| 07/23/1998 | DE19702094A1 Circuit breaker |
| 07/22/1998 | EP0854555A2 Integrated supply protection |
| 07/22/1998 | EP0854365A2 Numerical comparator |
| 07/22/1998 | EP0759220B1 Detector for monitoring the integrity of a ground connection to an electrical appliance |
| 07/22/1998 | CN2286537Y Excess voltage protector for power supply |
| 07/22/1998 | CN2286533Y Relay for anti-fraudulent-use of electricity |
| 07/21/1998 | USRE35854 Programmable protection circuit and its monolithic manufacturing |
| 07/21/1998 | US5784239 Drive to last reclosure operation in a protective relaying system |
| 07/21/1998 | US5784238 Coordinated cluster tool energy delivery system |
| 07/21/1998 | US5784233 Differential protection device of a power transformer |
| 07/21/1998 | US5783999 Audio warning device for use with a line current protection circuit in a PCMCIA-architecture modem card |
| 07/16/1998 | WO1998031086A1 Circuit for selective power supply to electrical units |
| 07/16/1998 | WO1998031084A1 Frequency-selective circuit protection arrangements |
| 07/16/1998 | DE19700828A1 Method of operating an automatic door assembly esp sliding door |
| 07/16/1998 | CA2276727A1 Circuit for selective power supply to electrical units |
| 07/15/1998 | EP0853364A2 Method for measuring a single electrical power load in electrical distribution networks |
| 07/15/1998 | EP0853363A1 Static switch |
| 07/14/1998 | US5781390 Integrated supply protection |
| 07/14/1998 | US5781385 Method and apparatus for protecting an adjustable impedance element controlling the power supply to an electric motor, in particular in a motor vehicle |
| 07/09/1998 | WO1998029932A2 A device and a method for protecting an object against fault-related over-currents |
| 07/09/1998 | WO1998029931A2 A device and a method for protecting an object against fault related over-currents, and its use |
| 07/09/1998 | WO1998029930A2 A device and a method for protecting an object against fault-related over-currents |
| 07/09/1998 | WO1998029929A1 Device and method relating to protection of an object against over-currents comprising over-current reduction and current limitation |
| 07/09/1998 | WO1998029928A2 Switching device including spark gap for switching electrical power, a method for protection of an electrical object and its use |
| 07/09/1998 | WO1998029927A2 Switching device including spark gap for switching electrical power, a method for protection of an electric object and its use |
| 07/09/1998 | WO1998029753A1 Method of calibrating the trip point of an overload relay |
| 07/09/1998 | CA2275639A1 Switching device including spark gap for switching electrical power, a method for protection of an electrical object and its use |
| 07/09/1998 | CA2275619A1 Device and method relating to protection of an object against over-currents comprising over-current reduction and current limitation |
| 07/08/1998 | EP0783788B1 Current differential protection arrangement |
| 07/08/1998 | CN2285949Y Low-voltage electric heating blanket |
| 07/08/1998 | CN1187063A Switching power source |
| 07/07/1998 | US5777868 Electrical Plug |
| 07/07/1998 | US5777835 Third phase reconstruction from a two current transformer sensor with three-phase true RMS and phase loss determination capabilities |
| 07/07/1998 | US5777833 Electronic relay for calculating the power of a multiphase electric load based on a rectified wave signal and a phase current |
| 07/02/1998 | WO1998028830A1 Programmable fuse and programming device for timer |
| 07/02/1998 | DE19651964A1 Hazardous voltage detection method, for subscriber lines at exchange |
| 07/01/1998 | EP0851554A1 Circuit breaker containing an opening control device and electrical distribution device with such a breaker |
| 07/01/1998 | EP0851553A1 Electronic trip device comprising, in series, a finite and infinite impulse response filter |
| 07/01/1998 | EP0850817A2 Load short-circuit failure detection method and apparatus and electric power steering device |
| 07/01/1998 | EP0850505A1 Overcurrent protection circuit |
| 07/01/1998 | EP0850504A2 Overcurrent protection circuit |
| 07/01/1998 | EP0850503A1 Overcurrent protection circuit |
| 07/01/1998 | EP0850502A1 Circuit configuration to detect excess temperature due to current flow |
| 07/01/1998 | EP0850486A1 Electrical switch |
| 07/01/1998 | CN2285530Y Leakage protector for 3.3KV electric net of coal mine underground pit |
| 06/30/1998 | US5774321 Power supply circuit with load protection function |
| 06/30/1998 | US5774319 Energy validation arrangement for a self-powered circuit interrupter |
| 06/30/1998 | US5774316 Ground fault detector for line-powered telephone network |
| 06/30/1998 | US5773945 Time-compensated overcurrent detection circuit for DC motor |
| 06/30/1998 | CA2125026C Electric arc detector |
| 06/30/1998 | CA2004444C Arrester with external isolator |
| 06/25/1998 | WO1998027641A1 Overvoltage protective circuit for step-down converter |
| 06/25/1998 | WO1998027636A1 Device and method relating to protection of an object against over-currents comprising over-current reduction |
| 06/25/1998 | WO1998027635A1 Device and method relating to protection of an object against over-currents comprising over-current reduction and current limitation |
| 06/25/1998 | WO1998027634A1 Device and method relating to protection of an object against over-currents comprising over-current reduction |
| 06/25/1998 | WO1998027633A1 Ground fault-rating plug for molded case circuit breakers |
| 06/25/1998 | CA2279394A1 Device and method relating to protection of an object against over-currents comprising over-current reduction |
| 06/25/1998 | CA2275638A1 Device and method relating to protection of an object against over-currents comprising over-current reduction and current limitation |
| 06/25/1998 | CA2275616A1 Device and method relating to protection of an object against over-currents comprising over-current reduction |
| 06/24/1998 | CN2285022Y AC three-phase balance protecting controller |
| 06/24/1998 | CN2285021Y 电话保安器 Phone protector |