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)
11/1989
11/22/1989CN2048246U Automatic protector of power transformer
11/22/1989CN2048245U Protector for fuse open-phase
11/21/1989CA1263171A1 Distribution line switchgear control employing a precision rectifier
11/21/1989CA1263144A1 Relay trouble detecting device
11/16/1989WO1989011174A1 Electronic control and protection device
11/16/1989DE3815475A1 Power supply device
11/15/1989CN2047852U Multifunctional power-stealing preventing protector
11/15/1989CN1037243A Arrangement for fault indication
11/14/1989CA1262957A1 Distribution line switchgear control with isolated cascaded power supplies
11/08/1989EP0341117A1 Interruption and short circuit detecting appliance
11/08/1989CN2047462U Electric shock-proof safety device
11/08/1989CN2047461U Full-automatic double-purpose protector for refrigerator and air conditioner
11/08/1989CN2047379U Kilowatt-hour meter with electric leakage and short-circuit protective function
11/07/1989US4879626 Overload relay with adjustable threshold indicator
11/07/1989US4879625 Voltage monitor
11/07/1989US4879624 Power controller
11/07/1989US4879623 Voltage transients
11/07/1989CA1262771A1 Ground-fault circuit interrupter
11/02/1989EP0339598A2 Protection circuit for capacitives loads
11/02/1989DE3913180A1 Stoerungsanzeiger fuer elektrische nutzleitungen Stoerungsanzeiger for Electric Utility line
11/02/1989DE3813403A1 Mobile residual-current device (residual-current circuit breaker)
11/02/1989DE3811291A1 Circuit for protection against parasitic signals
11/01/1989CN2047076U "general protector" for household electrical equipment
11/01/1989CN2047075U Refrigerator-protector capable of recalling delay
11/01/1989CN2047023U Anti-theft of power apparatus capable of cutting-off electric energy immediately
11/01/1989CN1036839A Circuit freakers test device
10/1989
10/31/1989US4878144 Solid-state trip device of a molded case circuit breaker
10/31/1989US4878143 Line current to time interpolator
10/31/1989US4878142 High resistance ground fault protection
10/26/1989DE3912601A1 Turn-off device for turning off at the minimum voltage
10/26/1989DE3810792A1 Circuit arrangement for preventing the application of AC voltages to isolated primary inputs
10/25/1989EP0338489A2 Power line monitorng circuit
10/25/1989EP0324012A4 Shorted-coaxial-cable detector for local-area networks.
10/25/1989CN2046689U Protector of domastic electric appliances
10/25/1989CN2046627U Multi-function electric appliance monitor
10/25/1989CN2046626U Digital electric meter with preset stored counts and self-controlling backing-up function
10/24/1989US4876624 Apparatus for detecting unsymmetrical bipolar waveforms
10/24/1989US4876622 Circuit breaker warning relay and control accessory
10/19/1989DE3811994A1 Electrical sensor circuit
10/18/1989EP0337233A2 Phase difference indicator for sinusoidal components of two signals, possibly distorted by non-linear filtering
10/18/1989EP0336943A1 Phase loss detection circuit including transient protection
10/18/1989CN2046286U Moderator of using electricity
10/18/1989CN1036481A Current relay
10/18/1989CN1005509B Control arrangements for electromagnetic suitches
10/12/1989EP0298092A4 Circuit breaker trip solenoid assembly.
10/11/1989CN2045906U Non-contact automatic reset current-limiting and voltage-limiting protector for leakage of electricity
10/11/1989CN2045905U High-performance automatic protector for three-phase lack phase
10/11/1989CN2045904U Multi-functional protector for domestic electric equipments
10/11/1989CN2045903U Fully-automatic electricity-rationing unit
10/11/1989CN2045902U Phase sensitized short circuit protection feeding switch
10/10/1989US4873603 Circuit breaker
10/10/1989US4873601 Spot network type power receiving and transforming protective apparatus
10/10/1989US4873474 Winch with shut-off load limiter
10/05/1989WO1989009507A1 Protective device for electrical motors and networks and temperature stabilizer
10/05/1989WO1989009456A1 Microprocessor-controlled circuit breaker system
10/05/1989WO1989009415A1 System for locating breaking point of transmission line using artificial satellite
10/04/1989CN2045547U Safety automation protector for domestic electric appliances
10/04/1989CN2045546U Full-automatic multifunction protector for electric appliances
10/03/1989US4871971 High impedance fault analyzer in electric power distribution networks
09/1989
09/27/1989CN2045160U Convenient-to-use general purpose open-phase relay
09/27/1989CN2045157U Fully automatic comprehensive protective device for household appliances
09/27/1989CN2045156U Multifunctional protective device for household electric consumer
09/27/1989CN2045155U Eight-functional fully automatic safety device for using electricity
09/27/1989CN2045154U Integrated-circuit protective device for air conditioner
09/27/1989CN2045153U Protective device for electric equipments
09/27/1989CN2045152U Household automatic electric current controller
09/26/1989US4870532 Electric circuit for operating trip circuit of a circuit breaker
09/26/1989US4870531 Circuit breaker with removable display and keypad
09/26/1989US4870527 Ground fault protection system
09/26/1989CA1261958A1 Ground fault receptacle with compact component arrangement
09/26/1989CA1260601A1 Distribution line switchgear control including a lockout target
09/26/1989CA1260171A1 Protection arrangement for a telephone subscriber line interface circuit
09/20/1989EP0333563A1 Electric power supply control unit for a charge in an intellegent integrated power circuit
09/20/1989EP0333412A1 Circuit breakers test device
09/20/1989EP0333139A1 Energization fault detection system
09/19/1989US4868706 Protection circuit for a battery charger
09/19/1989US4868704 Apparatus for providing distance protection and distance measurement for a high voltage transmission line
09/19/1989US4868412 Distributed control system
09/13/1989CN2044391U Multi-way electric sum batcher
09/13/1989CN2044390U Multi-functional automatic anti-electricity stealing and protector
09/13/1989CN2044389U Digit controlled protector for household appliance
09/13/1989CN2044388U Three function protective switch
09/13/1989CN2044387U Current limiter
09/12/1989US4866559 Solid state circuit protector
09/12/1989US4866558 Circuit breaker
09/12/1989US4866557 Low level voltage programmable logic control
09/12/1989US4866556 Circuit arrangement of a self protecting power switch
09/12/1989CA1259376A1 Protective control method and apparatus
09/08/1989WO1989008342A1 Electrical load shedding circuit
09/06/1989EP0331659A1 A method to control stops of an intermittently operating driving motor
09/06/1989EP0330851A2 Method of detection and limitation of an earth fault current
09/06/1989CN2044109U Three-phase a.c. circuit protector for loss of phase
09/06/1989CN2044108U Auto-reset device of three-phase current protector
09/06/1989CN2044107U Safety appliance used for broadcasting transmitted by power cable
09/06/1989CN2044106U Power saving switch for protection of electric appliance
09/06/1989CN1035392A Circuit breaker with over-temp. protection and low error calculator
09/05/1989US4864482 Conversion circuit for limiting inrush current
08/1989
08/30/1989EP0330148A2 Circuit breaker
08/30/1989EP0329974A2 Electrical safety socket
08/30/1989CN2043796U Protector for voltage stabilizer with eight functions
1 ... 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 ... 331