Patents
Patents for H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (21,232)
02/1995
02/07/1995CA1334300C Polymer housed electrical assemblies using modular construction
02/02/1995WO1995003645A1 Process and arrangement for limiting short circuit current on an electric energy transmission line
02/02/1995DE4419945A1 Protection device against earth shorts in high-voltage three-phase networks
02/02/1995CA2168025A1 Method for short-circuit current limiting on an electrical power transmission line, and an arrangement for short-circuit limiting
02/01/1995EP0637118A1 Circuit for limiting inrush current and overvoltage of an electronic ballast
01/1995
01/25/1995EP0635923A1 Circuit for protection against high energy overvoltages with controlled voltage clipping
01/25/1995EP0611495A4 Dual voltage power supply.
01/24/1995US5384529 Current limiting circuit and method of manufacturing same
01/24/1995US5384492 Protective system for insertion/extraction of PC boards in a powered-up environment
01/17/1995US5383081 Live insertion circuit
01/17/1995US5382888 Focusing device with two dynamic windings for energy recovery
01/12/1995WO1995001668A1 Method and apparatus for protecting an electric circuit
01/12/1995WO1995001667A1 A protection device using field effect transistors
01/12/1995CA2166418A1 A protection device using field effect transistors
01/11/1995EP0633640A2 An earth leakage unit
01/11/1995EP0633580A1 Power surge resistor pastes
01/10/1995US5381296 Short circuit limiting protector
01/10/1995US5381031 Semiconductor device with reduced high voltage termination area and high breakdown voltage
01/05/1995DE4418050A1 Hollow cylindrical, high-temperature superconductor and its use
01/04/1995EP0632560A2 Semiconductor integrated circuit device equipped with protective system for directly discharging surge voltage from pad to discharging line
01/04/1995EP0616728A4 Scr protection structure and circuit with reduced trigger voltage.
01/03/1995US5379178 Method and device for triggering an electromagnetic consumer
01/03/1995US5379177 Transient voltage surge suppressor with I2 R/I2 T overcurrent protection switch
01/03/1995US5379176 Protective input circuit for an instrument
01/03/1995US5379022 Thermistor device with extended operating range
01/03/1995US5379020 High-temperature superconductor and its use
12/1994
12/28/1994EP0630533A1 A short-circuit limiting protector
12/27/1994US5377067 Junction box with protection function to protect from overvoltage and overcurrent
12/20/1994US5375030 Surge protection device and system
12/20/1994US5374887 Inrush current limiting circuit
12/14/1994EP0629030A1 Electrical safety barriers
12/10/1994CA2122763A1 Telephone line overvoltage protection apparatus
12/07/1994EP0627121A1 Charged particle generation
12/06/1994CA1333408C Electronic ballast circuit for fluorescent lamps
11/1994
11/30/1994EP0626744A1 Current limiting device between an electronic board and a power supply
11/29/1994US5369626 Lightning protection for seismic data acquisition system
11/29/1994US5369543 Thyristor fail-safe device
11/29/1994CA2031508C Ignition prevention of electronic element through use of thermocontractive insulating tube
11/24/1994WO1994027350A1 Protection against lightning surges on power lines
11/24/1994DE4317191A1 Method for dissipating damaging overvoltages, as well as an arrangement for carrying out the method
11/23/1994EP0625289A1 Shunt circuit for electrostatic discharge protection
11/22/1994US5367569 Network interface modules
11/22/1994CA1333191C Power line surge suppressor
11/22/1994CA1333190C Fault current limiter
11/22/1994CA1333189C Protection circuit for battery feed circuit
11/17/1994EP0624943A1 Serial current limiting device
11/15/1994US5365420 High efficiency intrinsically safe power supply
11/10/1994DE4315170A1 Circuit arrangement for influencing inrush current (switching-on current)
11/09/1994EP0623984A1 Coupling circuit for a measuring instrument
10/1994
10/27/1994WO1994024752A1 Modular thyristor controlled series capacitor control system
10/27/1994DE4312764A1 Detection device for identifying the remanence level in the core of a transformer
10/27/1994DE4310233A1 Protection circuit for inductive loads
10/26/1994EP0621692A2 Overvoltage protection circuitry
10/26/1994EP0621678A1 Overvoltage protection circuit
10/26/1994EP0621148A2 Air-conditioning apparatus for electric vehicle
10/26/1994EP0621146A2 Electric car air-conditioning apparatus
10/25/1994US5359657 Telephone line overvoltage protection apparatus
10/25/1994US5359318 Hand-held electronic apparatus using two batteries sequentially supplying current to inductive element
10/25/1994CA1332752C Telephone lines overvoltage protection apparatus
10/19/1994EP0620630A1 Superconducting fault current limiter
10/19/1994EP0620570A1 Superconducting fault current limiter
10/18/1994US5357568 Telephone line overvoltage protection method and apparatus
10/12/1994EP0619637A1 Protection of an automobile three-phase alternator
10/12/1994EP0477367B1 Device for preventing inrush current from flowing into electric apparatus
10/12/1994CN1093497A Overvoltage limiter operated by capacitor bank
10/11/1994US5355275 Current limiting device for electromagnetic coil employing gap containing superconductive shield
10/11/1994US5355025 Active power line conditioner with synchronous transformation control
10/06/1994DE4310748A1 Switching controller
10/05/1994EP0543826B1 Process and device for driving an electromagnetic consumer
10/05/1994CN2178956Y Safety device for electrical equipment of household
10/04/1994US5353189 Surge protector for vehicular traffic monitoring equipment
09/1994
09/29/1994WO1994022197A1 Arrangement for disconnecting branches of a low voltage supply network under short circuit conditions
09/29/1994WO1994022157A1 Solid state circuit breaker
09/28/1994EP0617499A1 Power supply circuit
09/28/1994EP0616728A1 Scr protection structure and circuit with reduced trigger voltage.
09/22/1994DE4308986A1 Protective circuit breaker
09/20/1994CA1332074C Surge protection device
09/20/1994CA1332073C Surge suppression module
09/14/1994CN1092213A A shortcircuit limiting protector
09/13/1994US5347571 X-ray tube arc suppressor
09/13/1994US5347104 Heater control circuit
09/13/1994CA1331999C Voltage regulators for permanent magnet alternators
09/08/1994DE4342592C1 Current limiting device
09/08/1994DE4331250C1 Device for limiting the inrush current in a load circuit
09/07/1994EP0614298A2 Bussystem protected against the uncoupling of earth connections
09/06/1994US5345359 Process for the reduction of the switch-on surge in current during the operation of an inductive load
09/06/1994US5345212 Power surge resistor with palladium and silver composition
09/06/1994US5345114 Superconductor logic and switching circuits
09/01/1994WO1994019862A1 Electrical damping circuit for damping power signal resonance in a power distribution network
09/01/1994DE4306117A1 Starting-current limiter for fluorescent lamps
08/1994
08/31/1994EP0613226A1 Disconnector for surge arrester
08/30/1994US5343381 Electrical dampening circuit for dampening resonance of a power signal in a power distribution network
08/30/1994US5343352 Integrated circuit having two circuit blocks energized through different power supply systems
08/30/1994CA1331783C Surge absorber
08/30/1994CA1331782C Temperature compensated thermal protector
08/24/1994EP0611495A1 Dual voltage power supply.
08/23/1994US5341282 Circuit for detecting short-circuiting of inductive load drive devices
08/23/1994CA2026789C Power feed circuit for digital communications terminal equipment
08/18/1994WO1994018736A1 Overcurrent protective circuit and semiconductor device
08/17/1994EP0610898A1 Overvoltage protection device