Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02H - Emergency protective circuit arrangements › H02H 7 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
Patents for H02H 7 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions (32,726)
12/1981
12/02/1981EP0040786A1 Arrangement of a circuit for limiting and controlling the collector current of the final control transistor of a switching main supply
12/02/1981EP0040768A1 Monitoring device for an LC filter circuit of an alternating current network
12/02/1981EP0040766A1 Monitoring device for capacitor banks of a three-phase filter circuit
12/02/1981EP0040765A1 Monitoring device for a capacitor bank of an alternating current network
11/1981
11/26/1981WO1981003403A1 Field coil fault detector for automotive alternator battery charging systems
11/24/1981US4302715 Dynamic parallel inductive stabilizer for synchronous machines having torsional oscillations
11/17/1981US4301489 Arcless tap changer utilizing static switching
11/17/1981US4301434 Undervoltage release reset and lockout apparatus
11/17/1981US4301433 Circuit breaker electrical closure control apparatus
11/17/1981CA1112756A1 Overload protection circuit for video amplifiers
11/12/1981WO1981003247A1 Automatic fault protection system for power recovery control
11/11/1981EP0039616A2 Automatic fault protection system for power recovery control
11/10/1981US4300181 Commutation circuit for an HVDC circuit breaker
11/10/1981US4300085 Failure detection method and circuit for stepping motors
11/04/1981EP0038837A1 Circuit for automatic discharge protection of a passive current source
10/1981
10/27/1981US4297739 Device for exciting synchronous machine
10/27/1981US4297631 Battery charging systems for road vehicles
10/21/1981EP0038259A1 Process for detecting faults of a phase in an electric energy distribution system
10/20/1981US4296452 Multiphase fault protection circuitry with variable functional level detection
10/14/1981EP0037751A1 Static tripping device for an electric circuit-breaking switch
10/13/1981US4295176 Semiconductor integrated circuit protection arrangement
10/13/1981US4295174 Multi-series group capacitor bank protection equipment
10/13/1981CA1110741A1 Compressor minimum off-time system
10/13/1981CA1110723A1 Pressure sensitive interrupter
10/13/1981CA1110696A1 Saturable reactor-type power supply
10/07/1981EP0037088A1 Method for emergency operation at low supply voltage of an asynchronous machine with inverter and direct current regulator
10/06/1981US4293902 Transformerless fast current limiter with symetry correction for a switched-mode power supply
10/06/1981CA1110323A1 Series capacitor protection equipment with extended range dual sparkover feature
10/01/1981WO1981002818A1 Microcomputer controlled power tool
09/1981
09/30/1981EP0036752A1 Protection apparatus for electric power transmission systems
09/30/1981EP0036744A1 Fail-safe system for pulse-controlled three-terminal D.C. motor
09/30/1981EP0036503A1 Protection device for a converter
09/29/1981US4292534 Power and speed control device for a turbo-generator set
09/23/1981EP0036069A1 Digitally controlled machine
09/22/1981US4291355 Programmable overload circuit
09/22/1981US4291265 Protective system for inverter circuit used in driving AC motors
09/22/1981US4291263 Amortisseur winding protection system
09/22/1981US4291259 Control apparatus for controlling transistor chopper for use in current supply for electric motor
09/16/1981EP0035767A1 Semiconductor device
09/15/1981US4290109 Electric monitoring method and apparatus for electric system of automotive vehicle
09/09/1981EP0035365A2 Method and apparatus for fault detection
09/08/1981US4288831 Shutdown circuit for a switching power supply
09/08/1981US4288829 Protective circuit on insulating substrate for protecting MOS integrated circuit
09/08/1981US4288828 Protection system for electric motors
09/02/1981EP0034929A1 Protection of a MISFET of a semiconductor integrated circuit device
09/02/1981EP0034845A1 Protection circuit
09/01/1981US4287547 Method and apparatus for fault and/or fault direction detection
09/01/1981CA1108248A1 Solid-state switching circuit employing photon coupling
08/1981
08/25/1981US4286303 Protection system for an electric motor
08/25/1981US4286302 Electrical capacitor protective arrangement
08/25/1981CA1107818A1 Thyristor pulse control circuits
08/18/1981US4284933 Control circuit for reducing field voltage in D.C. motors
08/18/1981CA1107349A1 Protective circuit for a switching regulator
08/12/1981EP0033368A2 Method of protecting a D.C. converter against excessive voltages
08/05/1981EP0033161A1 Method and control circuit for temperature monitoring of an electric motor
08/04/1981US4282568 Electric power converting apparatus
08/04/1981CA1106443A1 Dc power transmission
07/1981
07/28/1981US4281358 Multifunction dynamoelectric protection system
07/28/1981CA1105999A1 Arrangement for monitoring a current network
07/21/1981US4280161 Over-voltage protected, self-contained mobile electrical network system, particularly for automotive applications
07/21/1981US4280059 Detecting power loss in free turbines
07/15/1981EP0031986A1 Overcurrent protection apparatus
07/14/1981US4278874 Heating circuits
07/08/1981EP0031594A2 High voltage direct current transmission installation
07/07/1981US4277738 Generator voltage regulator
07/07/1981CA1104680A1 Compact ptc resistor
07/01/1981EP0030980A1 Stabilized dc power source
06/1981
06/30/1981US4276605 Method and apparatus for supervising a digital protective relaying system
06/30/1981US4276588 Push-pull converter with energy saving circuit for protecting switching transistors from peak power stress
06/30/1981US4276587 DC to DC Converter
06/23/1981US4275430 DV/DT Protection circuit device for gate turn-off thyristor
06/23/1981US4275429 Protective relay apparatus
06/23/1981US4275342 Abnormality detecting system for DC motor control apparatus
06/23/1981US4275311 Control and protection system for an installation for the combined production of electrical and thermal energy
06/09/1981US4272708 Window lifter installation
06/02/1981US4271460 Soft turn-on power
06/02/1981US4271444 Ground fault trip mode network for static trip circuit breakers
06/02/1981US4271443 Quench detector
06/02/1981CA1102381A1 Current transformer secondary disconnect and shorting switch for a draw-out type switchgear
06/02/1981CA1102056A1 Electronic cutout circuit for vacuum cleaners
05/1981
05/26/1981US4270158 System of protection against short circuits and fulminations
05/20/1981EP0028784A1 Thyristor valve for high-voltage power converters
05/19/1981US4268886 Distance protection apparatus for electrical lines
05/19/1981US4268884 Current sensing circuit
05/19/1981US4268883 Reverse voltage protection for brushless excitation systems
05/19/1981US4267914 Anti-kickback power tool control
05/19/1981CA1101518A1 5,000 hour blocking oscillator for an electromagnetic fuel pump
05/19/1981CA1101489A1 Electrostatic coating system
05/14/1981WO1981001349A1 Circuit for automatic discharge protection of a passive current source
05/12/1981CA1101062A1 Series capacitor system with force firing of protective bypass device
05/12/1981CA1101052A1 Arcing stacked plate nonlinear resistor for voltage limiter applications such as series capacitor protection
05/06/1981EP0027843A1 Method and apparatus for protecting an electric motor
05/05/1981US4266259 Long-time and short-time overcurrent signal processor for circuit breaker static trip units
05/05/1981US4266257 Motor over-heating protection circuit
04/1981
04/21/1981US4263646 Missed commutation detector and safeguard arrangement
04/21/1981US4263644 Current limiter for switched DC-to-DC converter
04/21/1981US4263536 Control circuit for a motor-driven door operator
04/21/1981CA1099782A1 Ground fault protective apparatus of field windings
04/14/1981CA1099416A1 Device comprising a high voltage electron
04/14/1981CA1099376A1 D-c motor flashover protection
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