Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02H - Emergency protective circuit arrangements › H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
Patents for H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (21,232)
11/1990
11/08/1990DE3913932A1 Protection circuit for AC switching of transformer loads - has memory elements to control circuit by detection of current direction
11/07/1990CN1046824A Protective arrangement for telecommunications line interface circuit
11/06/1990US4969062 Ground fault protection circuit
10/1990
10/31/1990EP0395231A2 Protective arrangement for telecommunications line interface circuit
10/31/1990EP0216894B1 Electronic fuse
10/30/1990US4967302 Safety barriers for 2-wire transmitters
10/30/1990US4967176 Assemblies of PTC circuit protection devices
10/30/1990US4967131 Electronic motor starter
10/25/1990WO1990013165A1 Electronic part with safe-guard function
10/25/1990CA2014086A1 Protective arrangement for telecommunications line interface circuit
10/24/1990EP0393854A1 Fail-safe surge arrester
10/24/1990EP0393333A2 Telephone lines overvoltage protection circuit
10/24/1990CN2064560U Power saving and protective area-located barostats for use on a group of lamps and lanterns
10/24/1990CN1010155B Circuit protector of communication line
10/24/1990CN1010153B Circuit arrangement for protecting switch transistor
10/24/1990CN1010151B Voltage stabilizer capable of limiting amplitude of open-circuit over-voltage to a great extent for arc furnace transformer
10/18/1990WO1990012439A1 Device for a.c. cut-in limitation
10/18/1990DE4011170A1 Switching surge limiting circuit for AC power source - has phase angle control for delaying switch=on point of source w.r.t. occurrence of natural zero of system voltage
10/16/1990US4964160 Protector device
10/16/1990US4964140 Digital differential signal transmission apparatus
10/11/1990DE3911431A1 Integratable free-wheeling circuit
10/10/1990CN2063712U Over-voltage and -current protective device for electric appliances
10/10/1990CN2063711U Commutating power supply safe to electric shock
10/03/1990CN2063314U Controller for electric load
10/02/1990US4961066 Fault current limiter
09/1990
09/30/1990CA2013568A1 Five pin protector module for telephone circuits
09/26/1990EP0389452A2 Bridge circuit having polarity inversion protection means entailing a reduced voltage drop
09/26/1990EP0388753A1 Electronic assembly
09/26/1990CN1045675A Interface circuit with transient event tolerance
09/20/1990DE3908236A1 Overvoltage protection, especially overvoltage protection device
09/19/1990EP0388022A2 Solid state overcurrent protection device
09/19/1990EP0388021A2 Interface circuit with transient event tolerance
09/19/1990EP0387798A1 Monolithic integrable transistor circuit for limitating a negative overvoltage
09/19/1990EP0387797A1 Monolithic integrable transitor circuit for limiting a positive overvoltage
09/19/1990EP0387730A2 Electronic contactor with emergency shut-down
09/18/1990US4958254 Five pin protector module for telephone circuits
09/18/1990US4958250 Voltage isolation apparatus for service transformers
09/18/1990US4958200 Overcurrent protection circuit for semiconductor device
09/18/1990US4958119 Voltage regulators for permanent magnet alternators
09/12/1990EP0386938A2 Computer bus structure permitting replacement of modules during operation
09/12/1990EP0386288A1 Device for monitoring electronic circuits or components
09/07/1990WO1990010333A1 Device for preventing inrush current from flowing into electric apparatus
09/06/1990DE3906260A1 Module with storage drives
09/05/1990EP0385832A1 Electrical-overvoltage limitation arrangement
09/05/1990EP0385270A2 Surge protector
09/05/1990EP0384937A1 Protection circuit for a power MOSFET
09/04/1990US4954923 Intrinsic safety module interface
09/01/1990CA2011170A1 Surge protector
08/1990
08/29/1990EP0384346A1 Interruption device for high-tension DC
08/28/1990US4952173 Circuit protection device
08/16/1990EP0382447A1 Electrical surge arrester/diverter
08/16/1990DE3903789A1 Circuit arrangement for switch-on (making) current limitation
08/09/1990WO1990009049A1 Uniform current and voltage distribution device
08/07/1990US4947426 Telephone protection circuit
08/02/1990DE4000674A1 Feed inherently safe electric switch - has mains power unit and DC-DC converter fed between which are arranged two diodes
07/1990
07/31/1990US4945463 Switched power pack with protective device for limiting output voltage
07/31/1990US4945442 Protective circuitry for high-energy transients
07/31/1990US4945277 Control device for a vehicle A.C. generator
07/24/1990US4944004 Interface circuit with transient event tolerance
07/24/1990US4943887 Frequency-dependent overvoltage protective device for high voltage appliances
07/24/1990US4943884 Arrangement operable to power a load from a source of AC voltage
07/18/1990EP0377853A2 Control device for a vehicle a.c. generator
07/10/1990US4941063 Telephone lines overvoltage protection apparatus
07/10/1990CA1271517A1 Filter using zno arresters as small capacitors in normal operation
07/05/1990DE3844053A1 Superconductive switch
07/03/1990US4939776 Logic signal circuit for a releasing relay
07/03/1990US4939619 Packaged solid-state surge protector
07/03/1990US4939618 Lightning protected electric fence controller system and method
06/1990
06/28/1990WO1990007213A1 A protection circuit
06/27/1990EP0375020A2 A transient protection circuit
06/27/1990CN1043417A Telephone protection circuit
06/26/1990US4937696 Circuit breaker and current-limiting device of ceramic positive temperature coefficient resistor
06/20/1990EP0373676A2 Protection apparatus against electrical overvoltages
06/19/1990US4935836 Guard circuit for the protection of capacitive loads
06/13/1990EP0372673A2 Telephone protection circuit
06/13/1990EP0210192B1 Installation for the filtering and transitory stabilization of mains voltage
06/12/1990CA1270300A1 Safety circuit system for overvoltage protection of multiwire lines
06/06/1990EP0371275A2 A high speed, current limiting device
06/05/1990US4931895 Electrical transient surge protection
05/1990
05/31/1990DE3840198A1 Plug socket with overvoltage protection
05/29/1990US4930039 Fail-safe surge arrester
05/29/1990US4930036 Electrostatic discharge protection circuit for an integrated circuit
05/22/1990US4928199 Chip package including threshold switching device formed from chalcogenide glass
05/17/1990DE3938177A1 Stossstrom-unterdrueckungsschaltung und magnetische einrichtung darin Surge current-unterdrueckungsschaltung and magnetic device is
05/09/1990EP0367170A1 Fault current limiter
05/09/1990EP0366860A2 Polyurethane systems especially adapted for surge suppression
05/08/1990US4924344 Circuitry for protection against electromotively-induced voltage transients in solid state relay circuits
05/08/1990US4924342 Low voltage transient current limiting circuit
05/08/1990US4924341 Unidirectional circuit device
05/08/1990US4924340 Circuit protection device
05/08/1990US4924339 Input protecting circuit in use with a MOS semiconductor device
05/03/1990WO1990004872A1 Voltage regulators for permanent magnet alternators
05/03/1990WO1990004869A1 Transient suppressor
05/01/1990US4922382 Line protection device
05/01/1990US4922367 Circuit for preventing latch-up of parasitic thyristor formed in CMOS integrated circuit
05/01/1990US4922366 Meltable conductor to be used in series with voltage suppressors
05/01/1990US4922124 Power converter device
04/1990
04/26/1990DE3835662A1 Device for actuating inductive loads in a motor vehicle
04/25/1990CN2056548U Instantaneous automatic current limiting device for load starting
04/24/1990US4920443 Electrical protection assemblies
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