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)
09/1995
09/26/1995US5453903 Sub-cycle digital distance relay
09/26/1995US5453899 Lightning protection device
09/26/1995US5453669 Motor current detection circuit
09/21/1995DE4409880A1 Monitoring auxiliary wires in differential protection scheme
09/20/1995EP0651921A4 Current limiters in power utility applications.
09/20/1995CN2208282Y Multifunctional monitor for electric charge evasion
09/20/1995CN1108821A Parallel and series protection module
09/20/1995CN1108820A Telephone line overvoltage protection apparatus
09/19/1995US5452223 Arc detection using current variation
09/19/1995US5452174 Power source circuit incorporating a protection device therein and a printer device employing the same
09/19/1995US5452173 Diagnostic circuit protection device
09/19/1995US5452171 Electrostatic discharge protection circuit for integrated circuits
09/19/1995US5451845 Device for protecting a ballast circuit from excess voltage
09/14/1995DE4406902A1 Warning light circuit for protective circuit breakers
09/13/1995EP0671798A1 Electronic thermal protection circuit
09/13/1995EP0671632A2 Field winding ground fault detector and relay
09/13/1995EP0505531B1 Power supply for generating an output voltage mainly of sinusoidal shape
09/13/1995CN2207654Y High voltage earthing protective implement
09/13/1995CN2207653Y Abnormal detection protecting device for transformer and its output
09/13/1995CN2207652Y 多功能空调保护器 Multifunction air conditioning protection
09/13/1995CN2207651Y Circuit security controller
09/13/1995CN2207650Y Single-phase power limit controller
09/12/1995US5450268 Method and apparatus for RMS current approximation
09/08/1995WO1995024014A2 One-terminal data fault location system
09/08/1995CA2184091A1 One-terminal data fault location system
09/06/1995CN2207020Y Ground phase loss protection device
09/05/1995US5448443 Power conditioning device and method
08/1995
08/31/1995WO1995023450A1 A system for off-mains switching of current consuming devices such as actuators
08/31/1995DE4406496A1 Fault current circuit breaker
08/30/1995EP0669691A1 Circuit for devices for measuring and monitoring electrical currents
08/30/1995EP0669049A1 Switching arrangement
08/30/1995CN2206507Y Anti-stealing electricity device for citizen use
08/29/1995US5446386 Molded case circuit breaker auxiliary power supply plug
08/23/1995CN2206002Y Automatic treater for driver of dc electric machine
08/22/1995US5444590 Solid state power controller with power switch protection apparatus
08/22/1995US5444377 Electronic trip device comprising a test device
08/17/1995DE19505652A1 Instantaneous phase and amplitude measurement circuit +
08/16/1995CN2205599Y Safety device for preventing fraudulent use of electricity
08/16/1995CN1106958A Protection and control device for electrical loads background of the invention
08/16/1995CN1106957A Self-testing circuit breaker ground fault and sputtering arc trip unit
08/16/1995CN1106763A Spinning machine producing cross reel
08/15/1995US5442216 Semiconductor device having active device cells and a monitor cell
08/10/1995DE4406724C1 Electrical power transmission system line differential protection arrangement
08/09/1995EP0666629A2 Test method and apparatus for testing a protective relay system
08/09/1995EP0556191B1 Servomotor-control circuit
08/09/1995CN2205072Y Phase breaking off protector
08/09/1995CN2205071Y Simple and reliable safety unit for household electric appliances
08/09/1995CN2205070Y Limiter for electric supply
08/09/1995CN1106568A Earth fault circuit breaker
08/08/1995US5440441 Apparatus for protecting, monitoring, and managing an AC/DC electrical line or a telecommunication line using a microprocessor
08/03/1995DE4406722C1 Line differential protection system with respective protection unit
08/02/1995EP0665625A2 Method for obtaining an impedance value and for processing in a distance protection device
08/02/1995EP0665623A1 Test device for differential circuit breaker and differential circuit breaker containing the same
08/02/1995EP0665440A1 Device for indicating that a current passage occured in the conductors of lightning protection equipment
08/02/1995EP0664933A1 Sensor for registration of leak current
08/01/1995CA2007778C Directional comparison blocking protective relay system
07/1995
07/27/1995WO1995020257A1 Residual current safety switch
07/26/1995EP0664594A1 Protection circuit for motor-driven pumps
07/26/1995EP0534950B1 Process for controlling the current supply device of an electrofilter
07/26/1995CN2204073Y Multi-function integrating automatic control protective arrangement for electric appliance
07/25/1995US5436786 Isolator surge protector for DC isolation and AC grounding of cathodically protected systems
07/25/1995US5436785 Electronic trip device comprising an earth protection
07/20/1995WO1995019630A1 A compact coil assembly for transient voltage protection
07/19/1995EP0663712A2 Earth leakage breaker and earth leakage-current protection system
07/19/1995EP0663167A1 Arrangement for the off-mains switching of a control device
07/19/1995EP0663114A1 Digital protective relay arrangement.
07/19/1995EP0615667B1 Arrangement for the off-mains switching of control devices
07/19/1995CN2203805Y Electronic heating relay
07/19/1995CN2203804Y Laboratory safety electric power
07/13/1995WO1995019059A1 Device for differentially protecting a power transformer
07/12/1995EP0662743A1 Electronic device for thermal protection
07/11/1995CA2139815A1 Electronic thermal protection device
07/08/1995CA2139828A1 Advanced surge suppressor incorporating phone line surge protection and electronic switching
07/05/1995EP0661790A2 Three phase throttle current technique
07/05/1995EP0661189A1 DC Power supply circuit
07/05/1995EP0660789A1 Container for a hanger-supported garment
07/05/1995CN2202990Y Single-phase leakage overcurrent ultravoltage protecting switch
07/05/1995CN2202989Y Ground insulation monitoring protector
07/05/1995CN1104809A Relay protector
07/04/1995US5430636 Inverter apparatus and inverter controlling method having fault protection
06/1995
06/29/1995DE4440449A1 Idling and stoppage control of drives for roller blinds etc and also film screen
06/28/1995CN2202368Y Controlling device of three-phase low-voltage power-supply monitor
06/28/1995CN2202367Y Three-phase four-functional automatic protective switch
06/28/1995CN2202330Y Intellectural automation control safeguard
06/27/1995US5428553 Digital control and protection equipment for power system
06/27/1995US5428495 Electrical switching apparatus with digital trip unit and automatic frequency selection
06/27/1995US5428494 Power line protector, monitor and management system
06/27/1995US5428492 Current driver having voltage transition failure-based short circuit protection circuit
06/22/1995WO1995017032A1 Clocked current supply
06/22/1995DE4343560A1 Fault current protection switch
06/21/1995EP0658275A1 Improvements in and relating to electromechanical relays.
06/21/1995CN2201746Y Electronic voltage loss buckle detaching device circuit
06/21/1995CN1103997A Ground fault circuit interrupter with immunity to wide band noise
06/20/1995US5426592 Circuit breaker trip unit which automatically adapts to operated with a particular display module
06/20/1995US5426590 Device for numerical computation of a symmetrical component of an electtical quantity of a three-phase power system and relay incorporating it
06/20/1995US5426556 Extra protection module of an exchange
06/20/1995US5426553 Apparatus for monitoring grounded states of multiple DC loads of relay system
06/20/1995US5426552 Electrical supply safety socket
06/14/1995EP0657033A1 Detecting faults in power lines.
06/14/1995CN2200883Y Loss of phase protection type ac. contacter