Patents
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)
06/1996
06/25/1996US5530613 Current limiting circuit controller
06/25/1996US5530329 Drive control device for opening/closing member
06/25/1996CA2037672C Power supply interface apparatus for communication facilities at a power station
06/20/1996DE4445106A1 Schaltungsanordnung zum Detektieren eines Überlastzustands in einem Verstellantrieb Circuit arrangement for detecting an overload condition in an adjusting
06/20/1996DE4444762A1 Schaltungsanordnung und Verfahren zum Betreiben eines Verstellantriebs Circuit arrangement and method for operating an adjusting drive
06/19/1996EP0717498A1 A circuit for detecting a short circuit in a low side driven load
06/19/1996CN2229723Y Phase loss and phase-sequence protection relay
06/19/1996CN2229722Y Protector for short circuit
06/18/1996US5528449 Arrangement for separating a control device from an AC mains supply
06/18/1996US5528448 Heat flow detector for recessed incandescent fixtures
06/16/1996CA2165226A1 Circuit for detecting a short circuit in a low side driven load
06/13/1996WO1996018229A1 Circuit breaker with an electronic trip element and a bypass circuit
06/13/1996WO1996018226A1 Instrument panel
06/13/1996WO1996018110A1 Plant parameter detection by monitoring of power spectral densities
06/12/1996EP0716494A1 Overvoltage protection device
06/12/1996EP0716491A1 Electronic trip device with a microprocessor
06/12/1996EP0716214A2 Method and device for controlling the stopping of electric motor driven roller shutters or the like
06/12/1996CN2229112Y Multifunctional protector for electric appliance
06/12/1996CN2229109Y Overvoltage protective device for household electric appliances
06/12/1996CN2229108Y Multifunctional plug
06/12/1996CN1124418A Overcurrent trip unit with separately adjustable neutral protection
06/12/1996CN1031987C Controlling apparatus for elevator door
06/11/1996US5526213 Ground fault protection for EMAT transistor switched magnet pulsers
06/11/1996US5525878 Apparatus and method for controlling an electric motor
06/11/1996US5525876 Safety cutoff power window control device
06/11/1996US5525856 Light irradiation device
06/05/1996CN1123972A Current limiter for voltage/frequency type inverter
06/05/1996CN1123962A Automatic electronic air-switch
06/04/1996US5524083 Decentralized, modular tripping arrangement
06/04/1996US5523938 Differential current fault protection for an AC/DC hybrid system and method therefor
06/04/1996US5523665 Active discharge circuit for charged capacitors
06/04/1996CA2080230C Ac power conditioning circuit
05/1996
05/30/1996WO1996016459A2 Fault current breaker with a cumulative current converter
05/30/1996WO1996007192A3 Electromechanical switching device and arrangement with several such devices
05/30/1996DE4439072A1 Earth-fault circuit breaker for electrical equipment
05/28/1996US5521787 Differential current fault protection for a system utilizing a power conversion unit exhibiting balanced load characteristics
05/28/1996US5521603 Incipient lightning detection and device protection
05/28/1996US5521474 Method for monitoring movable elements
05/22/1996EP0713279A1 Apparatus providing protection and metering in an ac electrical system utilizing a multi-function sampling technique
05/22/1996EP0521912B1 Arcing fault detector
05/22/1996EP0465567B1 Voltage-to-frequency squared circuit
05/22/1996CN2227840Y Current sneaking-proof device for electrometer
05/22/1996CN1122963A DC power supply circuit
05/22/1996CN1122962A Power swing detection apparatus for electric power system
05/21/1996US5519561 Circuit breaker using bimetal of thermal-magnetic trip to sense current
05/21/1996US5519558 Three phase throttle current technique
05/21/1996US5519368 Compact coil assembly for transient voltage protection
05/17/1996WO1996014684A1 Solid state, resettable overcurrent protection device
05/15/1996EP0712193A1 Circuit breaker using bimetal of thermal-magnetic trip to sense current
05/14/1996US5517165 Switch mechanism
05/09/1996WO1996013888A1 Process for detecting a ground fault in an electric energy transmission line
05/09/1996DE4439125A1 Integrable voltage-limiting circuit for vehicle anti-theft device portable inductively-coupled data carrier
05/09/1996DE19542388A1 Heating/cooling system control method
05/08/1996EP0711014A1 Protective circuit for the power supply and method of use
05/08/1996CN1122173A Process for regulating an automatic door operated by a drive motor
05/08/1996CN1031774C Method and arrangement for single phase earthing protection of low-current system
05/07/1996US5515231 Thyristor valve arrester and DC power transmission thyristor valve using the same
05/07/1996US5515227 Fault identification system for use in protective relays for power transmission lines
05/05/1996CA2162101A1 Protection circuit for dc supply
05/02/1996WO1996013090A1 Detection and isolation circuit for a failed bridge power rectifier and an electrical system employing same
05/02/1996WO1996012969A1 Numerical comparator
05/02/1996DE4439499A1 Verfahren zum Erfassen eines Erdkurzschlusses auf einer elektrischen Energieübertragungsleitung A method for detecting a ground fault on an electric power transmission line
05/02/1996DE4438592A1 Thyristor short-circuiter for quenching interference arcs in LV power-thyristor type switching systems
05/02/1996DE19539925A1 Servo-drive arrangement for opening and closing motor vehicle window
05/02/1996CA2203166A1 Numerical comparator
05/01/1996EP0709961A2 Method and circuit for controlling and monitoring a load
05/01/1996CN2226348Y Stealing electricity-preventing apparatus for line-frequency three-phase power supply line
04/1996
04/30/1996US5513062 Power supply for a redundant computer system in a control system
04/30/1996US5513061 Apparatus and method for distributing electrical power
04/30/1996US5513060 Series protection circuit
04/30/1996US5512883 Method and device for monitoring the operation of a motor
04/30/1996US5512852 Automatic trigger circuit with floating-gate detection transistor
04/25/1996WO1996012332A1 Overvoltage protection
04/25/1996DE4437351A1 Adjustment of protection circuit of motor for document shredder cutter drive
04/25/1996DE4436858A1 Überspannungsschutzeinrichtung Overvoltage protection device
04/24/1996EP0708339A2 Data collection and processing for digital AC power system monitor/analyzer
04/24/1996CN2225730Y Moment limiter for electric tool
04/24/1996CN1121271A Electronically controlled automatic switch plug for AC supply
04/23/1996US5510950 Method and circuit for controlling and monitoring a load
04/23/1996US5510949 For coupling electrical power to a load
04/23/1996US5510946 Circuit breaker protection against "arc short circuit" hazards
04/23/1996US5510945 Power supply for ground fault circuit interrupter
04/23/1996US5510944 Power supply over-voltage protection
04/17/1996EP0707367A1 Ground fault detecting apparatus and method for detecting ground fault of field circuit and exciting circuit by detecting ground fault current flowing from ground to neutral point of exciting circuit
04/17/1996EP0706726A1 Ground fault protection for electrothermal de-icing applications
04/17/1996EP0653110B1 Reverse-polarity protection with reduced element surface
04/17/1996CN2225101Y Quota electric supplier
04/17/1996CN2225055Y Multifunctional single phase watt-hour meter
04/17/1996CN1120672A Insulation state measurement method, insulation state judgement apparatus, and dispersion type power generating system using the same
04/16/1996US5508875 Self powered remote trip indicator
04/11/1996WO1996010857A1 Current differential protection arrangement
04/11/1996WO1996010856A1 Graphical display for an energy management device
04/11/1996DE4445060C1 Power switch with electronic tripping device
04/11/1996DE4435726A1 Motor vehicle electrical circuit arrangement
04/10/1996EP0705482A1 Switching contactor driving circuitry
04/10/1996EP0608290B1 Method and device for avoiding overcurrents in a welding converter
04/10/1996CN2224478Y Super-high-voltage self-power-off protector
04/10/1996CN1120255A Overcurrent protection circuit and apparatus using thereof
04/10/1996CN1120187A Multifunction efficient energy-saving device
04/09/1996US5506485 Digital modular microprocessor based electrical contactor system