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