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)
12/1991
12/11/1991EP0460643A2 Emergency circuit for, e.g., numerical control unit
12/10/1991US5072403 Equipment for and methods of locating the position of a fault on a power transmission line
12/10/1991US5072083 Grounded gas blast circuit breaker/isolating switch with visual inspection assembly
12/05/1991DE4028538A1 Rotor earth protection arrangement for sync. generator - uses phase angle between measuring voltage and current through series through series protection circuit as response criteria
12/05/1991DE4021559C1 Hand-held electrical power tool with triac controlling motor - has current detecting circuit releasing reset pulse for counter during each half wave of mains voltage
12/05/1991DE4017270A1 Active screened superconducting magnet for nuclear spin tomograph - has inner and outer coil systems with bridging switch and superconducting limiter preventing excessive voltage rises
12/04/1991EP0459522A2 Fault location method for a parallel two-circuit transmission line with N terminals
12/04/1991EP0459102A1 Method and apparatus for monitoring the draft ratio in a drafting machine of a spinning machine
12/04/1991CN2090126U All-round protective switch for high power ac. electrical machine
12/04/1991CN2090125U Motor generator phase lack relay
12/04/1991CN2090124U Breaker protective device for three-phace electrical machinery
12/04/1991CN2090123U Multifunction protective device for lectrical machinery
12/04/1991CN1056781A Automatic control circuit of power silicon controlled rectifier direct current power source
12/04/1991CN1056776A Asynchronous motor protector for break, overload and short circuit
12/04/1991CN1056775A Three-phase asynchronous motor protector
12/03/1991US5069000 Reversing apparatus for powered vehicle door systems
11/1991
11/28/1991DE4016836A1 Safety system for asynchronous motor drive - monitors wide range of operating and function parameters to allow rapid detection of abnormality
11/27/1991EP0458716A2 Power system with a voltage sensitive switching circuit
11/27/1991CN2089668U Phase-lost, leakage protector for three phase motor
11/27/1991CN2089667U Three phase ac motor protector
11/27/1991CN2089664U Improved anti-explosive magnetic startor
11/26/1991US5068571 Switched bridge circuit
11/21/1991EP0456874A1 Overload protection for the winding of a DC-series-motor, monitored by a rotational speed measuring device
11/21/1991DE4116254A1 Brushless DC motor controller - avoids overheating of transistors by adjustment of frequency at which these are pulsed for switching of three=phase stator currents
11/19/1991US5067044 Sensor for detecting a quench in a superconductor using an optical coupling
11/13/1991EP0456172A2 Single pole or multipole relay for motor protection or overcurrent protection
11/13/1991CN2088753U 电动机保护器 Motor protection
11/13/1991CN2088752U Electric appliances protective starter
11/12/1991US5065304 Controller for AC power converter
11/07/1991DE4014079A1 Protection of three=phase motor against asymmetrical faults - improves security of contact protection and prevents consequences of phase angle without dependence on circulating current
11/06/1991EP0455484A2 Over-current controller
11/05/1991US5063472 Device for detecting superconductor quenching and application to a superconducting current limiter
11/05/1991US5063340 Capacitive power supply having charge equalization circuit
11/05/1991US5062278 Air-conditioning apparatus including an indoor unit and an outdoor unit having its compressor driven by a three-phase AC power supply
11/05/1991CA1291790C Bypass element for safeguarding battery cells
10/1991
10/30/1991EP0454597A1 Pulse gate control circuit with short-circuit protection
10/30/1991EP0453776A1 Switchgear with a circuit breaker or a load break switch and a fuse
10/30/1991CN2087837U Double protector for phase-failure and steering
10/30/1991CN2087836U Phase-failure protector for motor
10/30/1991CN1055842A Proctctor for overload and open phase of ac motor
10/29/1991US5061884 Current limiting control circuit for D.C. motors with line dropout protection
10/23/1991EP0453196A2 Transformer differential relay
10/23/1991CN2087394U Open circuit protector for secondary circuit of current mutual-inductor
10/22/1991US5058700 Drive force distribution control system for motor vehicle
10/22/1991CA1291264C Multi-phase electronic temperature controller
10/22/1991CA1291227C Capacitor circuit interruption
10/17/1991WO1991015890A1 Arcing fault detector
10/15/1991US5058031 Multilevel phase unbalance compressor motor protection system
10/15/1991US5057987 Fault detection and protection strategy for a pair of complementary GTO thyristors
10/15/1991US5057963 Opposite phase detecting device for alternating current electrical equipment
10/10/1991DE4010049C1 Pump unit for heating or cooling circuit - uses frequency regulator to reduce rotation of pump motor upon detected overheating
10/10/1991DE4009483C1 Self monitoring short circuit detector - has motor supply leads with DC transducers coupled via amplifier to self testing control
10/09/1991EP0450834A2 Stall protection circuit for an electronically commutated motor
10/09/1991EP0450126A1 Protection and monitoring device for a pulse resistor of a voltage intermediate circuit converter
10/09/1991EP0449822A1 Electronic control and protection device.
10/09/1991EP0449807A1 Process for monitoring short-circuits in a voltage circuit inverter.
10/09/1991CN2086473U Silicon controlled rectifier protecting switch of motor
10/09/1991CN2086472U Trigger protecting unit of motor
10/09/1991CN2086471U Automatic protector for alternating current motor overload
10/09/1991CN1055261A Open-circuit protector for secondary loop of mutual inductor
10/09/1991CN1014287B Combined multifunctional efficient electronic transformer
10/08/1991US5055961 Flyback current dampening apparatus
10/08/1991CA1290423C Dc voltage bleeder for a variable speed air conditioner
10/08/1991CA1290386C Fault current limiter for a dc motor drive system
10/05/1991WO1991015889A1 Battery protection system
10/02/1991EP0449153A2 Pump unit
10/02/1991CN2086013U Automatic protector for phase-interruption of motor circuit
10/02/1991CN2086012U High-voltage power supply with open circuit protector
10/01/1991CA1290012C Device for the limitation of torque in a hair treatment device
09/1991
09/25/1991CN2085576U Loss-of-phase protector for improved three-phase motor
09/25/1991CN2085575U Electronic protecting switch for motor
09/25/1991CN1054857A Protection device for distribution line
09/24/1991WO1991015027A1 Arc diverter
09/24/1991US5051672 Automatic window/door system
09/23/1991CA2012815A1 Conduction sensor system for multiple scr bridges
09/18/1991EP0446954A2 Control system for excitation of synchronous machine
09/18/1991CN2085104U Arc-suppressing and phase loss protector for ac. contactor
09/18/1991CN2085103U Phase loss protector for three-phase motor
09/18/1991CN1054687A Anti-burning electric motor with automatic control
09/17/1991US5049805 Voltage sensitive switch
09/17/1991CA1289188C Variable speed generator-motor apparatus
09/11/1991EP0446048A2 Power converter protection device
09/11/1991EP0446022A2 A sensor for detecting a quench in a superconductor using an optical coupling
09/11/1991CN2084682U Electric cart with phase-lost, over-load protective feature
09/11/1991CN2084675U Over-charge protector for solar generator
09/11/1991CN2084674U Phase-lost protective socket for three phase motor
09/11/1991CN2084673U Electric starting switch
09/11/1991CN1054509A Abnormal state protection circuit for inverter
09/10/1991US5047704 Motor control apparatus and motor controlling method
09/10/1991CA1288807C Electrical motor system
09/06/1991CA2037470A1 Sensor for detecting a quench in a superconductor using an optical coupling
09/04/1991CN2084246U Electricity saving type ac contactor with loss of phase protecting
09/04/1991CN2084245U Loss-of-phase protector for motor
09/04/1991CN2084244U Electricity saver for no-load consuming of motor
09/04/1991CN1054337A Protective circuit of high-power darlington transistors
09/03/1991US5045764 Motor monitor switching system
08/1991
08/29/1991DE4006163C1 Protecting power electronics equipment - regulating intermediate circuit for constant voltage and operating short-circuiting protector upon overvoltage
08/21/1991EP0442344A2 Overload-supervisory equipment for an electric load-carrying device
08/21/1991CN2083357U Phase-failure and overload protector for motors
08/21/1991CN2083330U 电磁开关 Solenoid switch
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