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)
10/1987
10/28/1987	CN86205727U Micro-energy consumption electric protector for residence
10/28/1987	CN86201827U Three-preventing (electric shock, power over-voltag and impulse power over-voltage) electric protector
10/27/1987	US4703410 Power failure indicator
10/27/1987	US4703389 Static trip circuit breaker with automatic circuit trimming
10/27/1987	US4703388 Overvoltage protection circuit arrangement for vehicular antiskid brake control systems
10/27/1987	US4703387 Electric motor underload protection system
10/27/1987	US4703191 Reserve power source with power failure detection apparatus
10/27/1987	CA1228641A1 Method and apparatus for monitoring and protecting a semiconductor output device
10/21/1987	EP0241832A1 Method and device for directional detection of a fault on a power transmission line
10/21/1987	CN87200911U Power failure protector for electrical refrigerator
10/21/1987	CN86108249A Automatic multifunctional protector of a refrigerator
10/20/1987	US4701684 Door or gate obstruction control
10/14/1987	EP0240783A1 Event counter for an overvoltage arrester
10/14/1987	EP0240617A1 Power failure indicator
10/07/1987	EP0239965A2 Method and circuit for excitation of a multiphase distance protection
10/07/1987	CN86210013U Voltage limit and protect device for refrigerator
10/06/1987	US4698718 Electronic reverse power relay
10/06/1987	CA1227832A1 Appartus for delectinf failures in a chopper equipped electrical power supply
10/03/1987	CN86206560U Multifunctional automatic protective device for household electric appliances
10/03/1987	CN86201328U Electric leakage-prood device
09/1987
09/30/1987	CN86206324U Fully automatic current-limiting relay
09/29/1987	US4697218 Overcurrent protection device
09/29/1987	US4696785 Testable voted logic power circuit and method of testing the same
09/24/1987	WO1987001902A3 Protective circuit for electric apparatus
09/24/1987	DE3609430A1 Method of chronologically correct recording of information contents of multiple information sources
09/23/1987	EP0237694A1 Circuit arrangement for evaluating AC signals obtained from a signal source
09/23/1987	CN86209936U Quantitative loading-overvoltage-leakage protector
09/22/1987	US4695961 Solid state overcurrent detector
09/22/1987	EP0164407A4 Shock hazard protection system.
09/21/1987	EP0204723A4 Auto-reset circuit breaker.
09/17/1987	DE3608793A1 Method for monitoring a circuit for fault currents, by means of an electrical current transformer
09/15/1987	US4694402 Waveform disturbance detection apparatus and method
09/15/1987	US4694374 Programmed overexcitation protective relay and method of operating the same
09/15/1987	US4694373 Circuit breaker with digital solid-state trip unit with optional functions
09/12/1987	CN86206071U Automatically protective switch for electric-leakage
09/12/1987	CN86204883U Contactless automatic-reset power-limiting dynamometer
09/12/1987	CN86204274U Automatic check and shot-off device for usage of electric-power against regulations
09/10/1987	DE3607596A1 High-voltage fuse
09/09/1987	EP0235479A1 Static tripping unit with test circuit for electrical circuit interruptor
09/09/1987	EP0235145A1 Device for supervision in non-directly earthed power systems.
09/08/1987	US4692903 Memory loss protection circuit
09/02/1987	CN86108321A Socket protected against electrical leakage
09/01/1987	US4691197 Blown fuse indicator
09/01/1987	US4691149 Apparatus and method for protecting a motor control circuit
08/1987
08/26/1987	EP0233444A1 Circuit arrangement for controlling a circuit interrupter
08/26/1987	EP0233443A1 Circuit arrangement for evaluating AC signals obtained from the secondary side of a transformer
08/26/1987	CN86209457U Protective plug and socket of household appliances
08/26/1987	CN86208046U Leakage protective solid switch
08/25/1987	US4689734 High-voltage direct-voltage source
08/25/1987	US4689712 Circuit breaker with solid-state trip unit with a digital processing system shunted by an analog processing system
08/25/1987	US4689710 Protective relay for an electric power system including decision-making computer means
08/25/1987	US4689709 Digital distance relay
08/25/1987	US4689570 Digital protective relay monitoring system
08/19/1987	EP0232741A1 Circuit for controlling a high-voltage fuse
08/19/1987	EP0232654A1 Reader for a numerical trip device in conjunction with a circuit breaker
08/19/1987	CN86201488U Overload-overvoltage protector for household appliances
08/18/1987	US4688134 Ground fault circuit interrupter and electronic detection circuit
08/18/1987	US4688133 Electronic detection circuit for a ground fault circuit interrupter
08/18/1987	CA1225716A1 Method and apparatus for detecting surge in centrifugal compressors driven by electric motors
08/12/1987	CN86107021A Electronic voltage relay circuit
08/11/1987	US4686601 Ground distance relay for AC power transmission line protection
08/11/1987	US4686393 Circuit breakers for direct and alternating current
08/05/1987	CN87100112A Solid-state trip device with test circuit for an electrical circuit breaker
08/05/1987	CN86202338U Refrigerator transient power-off protection device with automatic voltage regulation function
08/04/1987	US4685024 Overcurrent circuit interrupter using RMS sampling
08/04/1987	US4685022 Ground fault circuit interrupter capable of deriving energy from ground fault current in order to achieve circuit interruption in the presence of a reduced supply voltage
08/04/1987	US4685021 Fault current diverter
07/1987
07/29/1987	CN86209922U Passive automatic current limiter
07/29/1987	CN86203072U Electric shock protector
07/29/1987	CN86107915A Overcurrent circuit interrupter using rms sampling
07/28/1987	US4683515 Modular PTC thermistor overload protection system
07/28/1987	US4683513 Dual current transformer current sensing method and sensor
07/23/1987	DE3638737A1 Totally screened automatic switching device
07/22/1987	CN86108478A Direct transeer trip apparatus for use with an active pilot wire communications channel
07/22/1987	CN86108322A Static leakage current relay
07/21/1987	US4682264 Circuit breaker with digital solid-state trip unit fitted with a calibration circuit
07/21/1987	US4682263 Electrical short-cicruit monitoring arrangement for variable-speed, three-phase motors, including their feed lines
07/15/1987	CN86202029U 漏电保护器 Leakage protection
07/15/1987	CN86108311A Active pilot were apparatus for electromecanical current differential relays
07/14/1987	US4680706 Recloser control with independent memory
07/14/1987	US4680664 Overcurrent protection circuit for power transistors
07/08/1987	EP0227849A1 Electric power control apparatus
07/08/1987	CN86204232U Power-saving safe special switch for electric welder
07/07/1987	US4679111 Resistance to ground checker
07/01/1987	EP0227017A2 Method for detecting high resistance ground faults on a power transmission line
07/01/1987	EP0226704A1 Circuit arrangement for the detection of a fault current or differential current
07/01/1987	CN86203625U Power-saving unit for kilowatt-hour meter
07/01/1987	CN86105973A 母线差动继电器 Bus Differential Relay
06/1987
06/25/1987	DE3705177A1 Electronic fuse (protection device)
06/24/1987	EP0226530A2 Trip-indicating device for a low-voltage circuit breaker
06/24/1987	CN86206916U Automatic high-capacity leakage safety switch
06/24/1987	CN86205392U Safety cut-out
06/23/1987	US4675776 Bistable undervoltage release circuit for circuit breakers
06/23/1987	US4675775 Active pilot wire apparatus for electromechanical current differential relays
06/23/1987	US4675774 Direct transfer trip apparatus for use with an active pilot wire communications channel
06/23/1987	US4675773 Transmission line protection system
06/23/1987	US4675771 Fault sensing system for a transformer network
06/23/1987	CA1223330A1 Directional comparison blocking protective relay system
06/23/1987	CA1223329A1 Relay for pilot protection of electrical power lines
06/19/1987	DE3543985A1 Arrangement for detecting fault currents

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