Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02H - Emergency protective circuit arrangements › H02H 1 - Details of emergency protective circuit arrangements
Patents for H02H 1 - Details of emergency protective circuit arrangements (5,580)
03/1989
03/30/1989DE3825794A1 Device for evaluating disturbances in a power supply system
03/28/1989CA1251850A1 Protective device for preventing blowout of bushing in high-voltage switching installation
03/23/1989WO1989002666A1 Phase loss detection circuit including transient protection
03/22/1989EP0307826A1 Protection device for high resistance ground faults
02/1989
02/21/1989US4807082 Current surge protector for power fuses
02/08/1989EP0302470A2 Circuit breaker including selectively operable long-time-delay tripping circuit
01/1989
01/18/1989EP0299060A1 High impedance fault analyzer in electric power distribution.
01/05/1989DE3718608A1 Electrical tripping device
12/1988
12/28/1988EP0297079A1 Control and monitoring system for electric power distribution systems
12/21/1988EP0295342A1 Power source device for circuit breaker
12/15/1988DE3718183A1 Residual current device (differential-current protection circuit breaker)
12/13/1988US4791518 Device for detecting interfering arcs
12/06/1988CA1246146A1 Dual current transformer current sensing method and sensor
11/1988
11/23/1988EP0292430A1 Process and device for the overvoltage protection of an electrical conductor system
11/02/1988EP0289042A2 Circuit breaker
11/02/1988EP0289011A2 Current sensing device
10/1988
10/25/1988US4780656 Drive and protection system for variable speed motor
10/20/1988WO1988008217A1 An arc relay
10/20/1988DE3711244A1 Electrical installation system
10/04/1988US4775839 Control apparatus for the electronic detection in a.c. power transmission lines of fault locations causing power losses
09/1988
09/27/1988US4774621 For sampling an AC voltage and/or current in an electric power system
09/22/1988DE3707973A1 Power supply device having an overvoltage protection circuit
09/20/1988US4773070 Method for checking protective instruction transmission systems in on-line operation
09/13/1988US4771355 System and method for arc detection in dynamoelectric machines
09/06/1988US4769735 Inverse-time relay
09/06/1988CA1241728A1 Circuit breaker with digital solid-state trip unit fitted with a calibration circuit
08/1988
08/30/1988US4768018 Analog to digital converter for an electronic circuit breaker with out-of-supply-range input signals
08/24/1988EP0279692A2 Circuit interrupter apparatus with a battery backup and reset circuit
08/24/1988EP0279168A2 Circuit for the power supply of a multitude of consumers
08/23/1988US4766416 Circuit for generating the square of a function without multipliers
08/16/1988CA1240779A1 Signal quality monitor for protective relay system
08/10/1988CN87204526U Safety wire laying device of communication
07/1988
07/28/1988WO1988005543A1 High impedance fault analyzer in electric power distribution
07/13/1988EP0274326A1 Arc detection at a set of bars of an electric panel or of a switching cabinet
07/06/1988EP0273255A1 Protective differential-current circuit breaker
07/06/1988CN86102108B Switching device isolated by gas
06/1988
06/29/1988EP0272322A1 Protective device against electrostatic discharges on electronic equipment in general
06/21/1988US4752865 Power source device for circuit breaker
06/14/1988US4751606 Circuit interrupter apparatus with a battery backup and reset circuit
06/14/1988US4751605 Reader for a digital trip device associated with a current breaking device
06/14/1988US4751604 Comparison signal error detector for protective relay system
05/1988
05/19/1988DE3728197A1 Elektronisches schutzrelais Electronic overload relay
05/17/1988US4745512 Remote protection of three phase distribution transformers
05/04/1988EP0266046A1 Remote protection of three phase distribution transformers
03/1988
03/24/1988DE3631167A1 Method for producing a trip signal as a function of the magnitude and duration of an overcurrent
03/16/1988EP0260120A2 Control circuit with coordination provisions
03/15/1988CA1234199A1 Photoelectric smoke sensor
02/1988
02/10/1988CN86210751U Separating device for distinguishing between protective and non-protective circuit fault
02/03/1988EP0255505A1 Control and monitoring device for electrical power distribution installation
01/1988
01/20/1988EP0253009A1 Inverse-time relay
12/1987
12/30/1987WO1987007986A2 Protective device against electrostatic discharges on electronic equipment in general
12/23/1987EP0249815A1 Fault arc detector device
12/09/1987EP0248159A1 Current limit sensor for protected electrical devices
12/01/1987US4710843 Selectable integrating characteristic timer
11/1987
11/24/1987US4709291 Protective device for preventing blowout of bushing in high-voltage switching installation
11/12/1987DE3615557A1 Device for measuring current in a power cable, with the use of optical transmission lines (LWL)
11/10/1987US4706155 In an alternating current electrical distribution system
11/04/1987CN86100560A Defect monitor for capacitive storage circuit
11/03/1987US4704546 Auctioneering circuit
10/1987
10/27/1987US4702553 Fiber-optical sensor for detecting electric arc-discharges
10/15/1987DE3612090A1 Device for the optoelectronic detection of fault arcs
09/1987
09/29/1987US4697218 Overcurrent protection device
09/24/1987DE3609430A1 Method of chronologically correct recording of information contents of multiple information sources
09/22/1987US4695734 Photoelectric smoke sensor including a photosensing data correction ratio correction circuit
09/10/1987DE3607596A1 High-voltage fuse
08/1987
08/26/1987EP0233444A1 Circuit arrangement for controlling a circuit interrupter
08/19/1987EP0232654A1 Reader for a numerical trip device in conjunction with a circuit breaker
08/18/1987US4688136 Gas insulated switchgear
08/12/1987CN86100116A Circuit for limiting surge current
08/04/1987US4685024 Overcurrent circuit interrupter using RMS sampling
08/04/1987US4685022 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
08/04/1987US4685018 Arc detector for gas insulated electrical apparatus
07/1987
07/29/1987CN86107915A Overcurrent circuit interrupter using rms sampling
07/28/1987US4683513 Dual current transformer current sensing method and sensor
07/21/1987US4682264 Circuit breaker with digital solid-state trip unit fitted with a calibration circuit
06/1987
06/23/1987US4675773 Transmission line protection system
06/16/1987EP0225337A1 Device for the detection of corona discharges in alternating current overhead lines.
06/10/1987EP0224557A1 A ground fault circuit interrupter with an additional current-sensing element
05/1987
05/27/1987CN86107740A Signal conditioning circuit for electronic trip circuit interrupters
05/20/1987EP0222682A1 Signal transmission system for a comparison protection device
05/05/1987US4663690 Residual differential device equipped with a surveillance system for the electronic power supply
04/1987
04/14/1987US4658322 Arcing fault detector
04/01/1987EP0215917A1 Arc suppression technique
03/1987
03/31/1987US4654617 Magnetic circuit control apparatus
02/1987
02/25/1987CN86103005A Device of direct-current main supplied with stored energy by capacitor
02/03/1987US4641217 Two pole ground fault circuit breaker
01/1987
01/27/1987US4639817 Protective relay circuit for detecting arcing faults on low-voltage spot networks
01/07/1987CN86201888U Relay protection letter transmitter-receiver set
12/1986
12/17/1986CN86101917A Gas insulating apparatus
12/04/1986WO1986007160A1 Device for the detection of corona discharges in alternating current overhead lines
11/1986
11/25/1986CA1214540A1 Power supply for a circuit interrupter
11/20/1986WO1986006889A1 A ground fault circuit interrupter with an additional current-sensing element
11/19/1986CN86103460A Detector for electronially detecting defect of cause loss for electric-energy in the d.c. transmission lines
10/1986
10/21/1986US4618907 Desensitized ground fault interrupter
10/15/1986EP0197778A2 Gas insulated switchgear
10/01/1986EP0196234A2 Gas insulated switchgear
10/01/1986CN86102108A Switching device isolated by gas
09/1986
09/25/1986WO1986005651A1 Arc suppression technique
09/09/1986CA1211199A1 Overcurrent protection device
09/03/1986EP0193447A1 Static numerical circuit interrupter having a calibration circuit
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