Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02H - Emergency protective circuit arrangements › 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
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)
11/1998
11/03/1998US5831807 Overload and short circuit protection device for a power semiconductor circuit
11/03/1998US5831803 Electrical system
11/03/1998US5831802 Electronic circuit for automatic disconnector
10/1998
10/29/1998WO1998048504A1 Electrical plug
10/29/1998WO1998048497A1 Power supply network, especially on ships
10/29/1998DE19717743A1 Device for lowering or lifting physically disabled into or from bath
10/28/1998EP0874436A2 Hand machine-tool with protection device
10/28/1998EP0873583A2 Digital current differential system
10/28/1998CN2296084Y Electric leakage protector
10/28/1998CN2296083Y High voltage circuit short-circuit fault protector
10/28/1998CN2296014Y Multifunctional A.C. wattmeter
10/28/1998CN1197277A Realizing method and device for protecting and warning when resistance of security device losing efficacy
10/22/1998WO1998047324A2 Safety-enhanced transformer circuit
10/21/1998CN2295284Y Double-power-supply delayed protector for household electric-appliance
10/20/1998US5825643 Programming device for a circuit breaker
10/20/1998US5825602 Overcurrent trip device
10/20/1998US5825599 Ground fault circuit interrupter system with uncommitted contacts
10/20/1998US5825170 Magnetically coupled alternating stray current neutralizing method and system
10/20/1998US5825150 Method of detecting, diagnosing and automatically correcting abnormalities in servo control system
10/15/1998WO1998045919A1 Improvements in transient overvoltage and lightning protection of power connected equipment
10/13/1998US5822166 DC power bus voltage transient suppression circuit
10/13/1998US5822165 Sequence based network protector relay with forward overcurrent protection and antipumping feature
10/13/1998US5821876 Communication interface for bus connected circuit breakers
10/13/1998US5821869 Fault indicator for use with load-break connector
10/13/1998US5821642 Arc prevention circuit for a mechanical switch
10/13/1998CA2127022C Negative-sequence time-overcurrent relay
10/08/1998DE19712261A1 Elektronische Sicherung Electronic Security
10/07/1998EP0869599A2 Method and apparatus for detecting out-of-step in electric power system
10/07/1998EP0869597A1 Electrical overload protection device with predetermined cold and hot tripping items
10/06/1998US5818674 Solid state overload relay
10/06/1998US5818236 Method and apparatus for checking insulation of ungrounded power source
10/06/1998US5818122 Power supply circuit breaking apparatus for motor vehicle and power supply circuit breaking system for motor vehicle
10/01/1998WO1998043334A1 Electronic fuse
09/1998
09/30/1998EP0867999A1 A method and a device for detecting and handling short-circuit phenomena for power semiconductor devices
09/30/1998EP0867998A1 A plant for transmitting electric power
09/30/1998EP0867895A2 Current limiter and/or circuit breaker with PTC element
09/30/1998CN2293147Y Multifunctional phase- and amplitude-discriminating electric leakage protective device
09/29/1998US5815357 Device for monitoring a polyphase system connected to a load
09/29/1998US5815353 Overvoltage protector
09/29/1998US5815351 Overload protection circuit using a no-trim circuit for computer power supplies
09/27/1998CA2233351A1 Current limiter and/or circuit breaker with ptc element
09/23/1998EP0866556A1 Short circuit protection circuit
09/23/1998EP0866536A2 Universal ground fault circuit interrupter
09/23/1998EP0866535A2 Ground fault circuit interrupter for circuit with high fault current
09/22/1998CA2048722C Protective circuit and protective plug for telecommunication installations
09/19/1998CA2231219A1 Short circuit protection circuit
09/17/1998WO1998040947A1 Ground fault protection circuit for a multiple source system
09/16/1998EP0865137A1 Method of controlling the closing procedure of closable devices with at least one part driven by an electric motor
09/16/1998EP0864191A1 Circuit protection arrangements
09/16/1998EP0799516B1 Electrical circuit breaker
09/16/1998EP0763272B1 Circuit for limiting current
09/16/1998EP0611510B1 Device for connection and disconnection of an apparatus to a current source
09/16/1998CN1193240A Detection-digital-signal processor in digital videl-disk reproducing device
09/15/1998US5809045 Method of detecting faults on a power transmission line system
09/15/1998US5808849 Method for the protection in particular of telecommunication installations and protection circuit for carrying out the method
09/15/1998US5808848 Digital circuit interrupter shunt trip accessory module
09/15/1998US5808847 Electronic trip device comprising a power supply device
09/15/1998US5808846 Combination current sensor and relay
09/15/1998US5808845 System for preventing sympathetic tripping in a power system
09/15/1998US5808844 Current differential protection arrangement
09/15/1998US5808462 Apparatus for detecting the amplitude and phase of an a.c. signal
09/15/1998US5808441 Microprocessor based motor control system with phase difference detection
09/15/1998US5808327 AC controller
09/15/1998US5808326 Delta protection component
09/15/1998CA2066099C Multifunction protective relay system
09/09/1998EP0863596A1 Apparatus for waveform disturbance monitoring for an electric power system
09/09/1998CN2290942Y Fast automatic protector for household electrical appliances
09/09/1998CN2290941Y Intelligence integratly metering lighting distributing box
09/09/1998CN2290940Y Automatic fusing alarm
09/09/1998CN2290930Y Leakage protecting socket
09/08/1998US5805400 Auto-reclosing dead time control apparatus and method thereof for transmission cable protection relay system
09/08/1998US5805396 Protection circuit of drive system for motor
09/08/1998US5805070 Device for indicating a destroyed arrester
09/04/1998CA2230735A1 Apparatus for waveform disturbance monitoring for an electric power system
09/03/1998DE19804175A1 Automatic door or window operating system with incorporated obstacle detection
09/02/1998EP0862261A2 Overcurrent protection circuit and method
09/02/1998EP0862255A1 Disconnector for surge arrester
09/02/1998EP0861514A1 Jamming detection device for electrical drives
09/02/1998EP0649585B1 Switching arrangement for a communications channel
08/1998
08/27/1998WO1998037471A1 Voltage regulator circuit
08/27/1998DE19746444A1 Short circuit current limiter
08/27/1998CA2281675A1 Voltage regulator circuit
08/26/1998EP0860946A2 Switch circuit having excess-current detection function
08/26/1998EP0860927A1 Protection circuit arrangement for surge arrester
08/26/1998EP0860017A1 Loosely coupled mass storage computer cluster
08/26/1998EP0795222B1 Process for detecting a ground fault in an electric energy transmission line
08/26/1998CN2289328Y Distributed vacuum coincidence device
08/26/1998CN2289245Y Device for avoiding or indicating fraudulent use for watt-hour meter
08/25/1998US5798578 Synchronization device for a redundant power supply system
08/19/1998EP0859443A1 Protective relay and method
08/19/1998EP0858604A1 Source of waveform distortion discrimination circuit and method
08/19/1998EP0649584B1 Remotely actuated switch and protection circuit
08/19/1998CN2288502Y Energy-saving type electric network flashover keeper
08/19/1998CN1190817A Three-phase ac voltage protector
08/18/1998US5796636 Apparatus for and method of testing an electrical ground fault circuit interrupt device
08/18/1998US5796631 Method and apparatus for monitoring and characterizing power quality, faults and other phenomena in network power systems
08/18/1998US5796630 Protective relay system provided with difference and addition filters
08/18/1998US5796567 Electronic circuit with protection against supply voltage overload
08/18/1998US5796347 Control of a device in an inaccessible location
08/18/1998US5796259 Methods and apparatus for detection of fault direction
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