| 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) |
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| 12/08/2004 | EP1484243A2 Submarine |
| 12/08/2004 | CN1553550A Universal anti-electric wall device of electrothermal heating bowl washer with monolithic apparatus control |
| 12/07/2004 | US6829556 Method and system for detecting incipient failures in a traction system |
| 12/07/2004 | US6829544 Line current differential protective relaying method and relay for in-zone tapped transformers |
| 12/07/2004 | US6828919 Exciter assembly telemetry |
| 12/07/2004 | US6828701 Synchronous machine with power and voltage control |
| 12/07/2004 | CA2304882C Power distribution network incorporating a voltage support transformer and process of use |
| 12/02/2004 | WO2004105206A1 Method and arrangement for monitoring a power output stage |
| 12/02/2004 | US20040243288 Diagnostic system and method for electric leak detecting device |
| 12/02/2004 | US20040240134 Overload current protection device using magnetic impedance element |
| 12/02/2004 | US20040239275 Movable barrier operator multi-technique excess force avoidance apparatus and method |
| 12/02/2004 | US20040239271 Motor drive system |
| 12/02/2004 | US20040239269 Obstacle detector-responsive movable barrier operator apparatus and method |
| 12/01/2004 | EP1482634A2 Motor drive system |
| 12/01/2004 | EP1481461A1 Method for simulating the temperature curve of electric drives |
| 12/01/2004 | EP1481456A1 A protection device |
| 12/01/2004 | EP1481426A2 H-bridge with single lead frame |
| 12/01/2004 | CN2660780Y 电子变压器 Electronic Transformer |
| 12/01/2004 | CN2660759Y Output circuit of battery charger |
| 12/01/2004 | CN2660758Y Phaseloss auto protector for 3-phase motor |
| 12/01/2004 | CN2660757Y Frequency sensitive varistor overheat protector of 3-phase asynchronous dynamo |
| 12/01/2004 | CN2660679Y Overload protector of safety switch |
| 12/01/2004 | CN2660671Y High voltage load switch |
| 12/01/2004 | CN2660665Y Coil action monitor |
| 12/01/2004 | CN1551446A Cell low-voltage protector |
| 12/01/2004 | CN1551445A Method and device to monitor a power output stage |
| 12/01/2004 | CN1551444A DC to DC controller with inrush current protection |
| 12/01/2004 | CN1550949A Regulator protection circuit and power supply device comprising same |
| 12/01/2004 | CN1178373C Switch style power supply protection circuit |
| 12/01/2004 | CN1178359C Motor protector apparatus |
| 11/30/2004 | US6826065 Method of commutation of current by bi-directional switches of matrix converters |
| 11/30/2004 | US6826062 Method and apparatus for overload-controlling inverter power generation apparatus |
| 11/30/2004 | US6826029 Methods and apparatus for distributing electrical power |
| 11/30/2004 | US6826024 Power line with power shutdown device including detection line |
| 11/30/2004 | US6825628 Electronic controller for vehicular wheelchair access |
| 11/25/2004 | WO2004102764A1 Device for protecting a multiphase distribution transformer isolated in a liquid dielectric |
| 11/25/2004 | WO2004064219A3 Circuit protection system |
| 11/25/2004 | US20040233689 DC/DC converter with voltage clamp circuit |
| 11/25/2004 | US20040233634 Electronic controller modules and methods for making and using same |
| 11/25/2004 | US20040233598 Distribution network monitoring and control system |
| 11/25/2004 | US20040232538 Active integrated rectifier regulator |
| 11/25/2004 | DE202004013839U1 Protective circuit for temperature monitoring of coolant-cooled electric motors, includes evaluation device with facility for ascertaining the rate of change of sensor signal |
| 11/25/2004 | DE10357754A1 System und Verfahren zur gemeinschaftlichen Verwendung von Leistung für batteriebetriebene Steuerungs- und Anwendungsmodule System and process for the joint use of power for battery powered controller and application modules |
| 11/25/2004 | DE10318521A1 Elektrische Schaltungsanordnung Electrical circuitry |
| 11/25/2004 | DE102004020730A1 Verfahren für den thermischen Schutz eines Generators mit hoher Ausgangsleistung für Fahrzeuge A method for thermal protection of a generator with a high output power for vehicles |
| 11/24/2004 | EP1479149A1 Circuit protection system |
| 11/24/2004 | EP1479147A2 Method and apparatus for ground fault protection |
| 11/24/2004 | EP1479145A2 Integrated protection, monitoring and control system |
| 11/24/2004 | EP1479144A2 Method and system for external clock to obtain multiple synchronized redundant computers |
| 11/24/2004 | EP1478985A1 Data sample and transmission modules for power distribution systems |
| 11/24/2004 | EP1478984A1 Method and system for conditionally triggered system data capture |
| 11/24/2004 | EP1478983A1 Protection system for power distribution systems |
| 11/24/2004 | CN2658996Y Transistor coupling circuit |
| 11/24/2004 | CN2658995Y Motor thermal protector |
| 11/24/2004 | CN1549436A Middle voltage dc-to-ac converter with unit active bypass function and bypass control method thereof |
| 11/24/2004 | CN1549285A Solid electrolytic capacitors |
| 11/24/2004 | CN1177408C Insulated gate bipolar transistor IGBT drive protection circuit |
| 11/24/2004 | CN1177232C Data buffer method for real-time closed-loop test of relay protector in electric power system |
| 11/24/2004 | CN1177228C Digital current differential system |
| 11/23/2004 | US6822839 Method and apparatus of detecting internal motor faults in an induction machine |
| 11/23/2004 | US6822416 Device for monitoring the measuring system of an electric drive |
| 11/23/2004 | US6822410 Motor speed-based anti-pinch control apparatus and method |
| 11/18/2004 | WO2004100336A1 Intelligence automatic bypass for a motor control device fault |
| 11/18/2004 | WO2004073135A3 Monitoring system for a generator |
| 11/18/2004 | US20040228051 System and method for speed control and stall protection combination for electric motors such as in engine cooling applications |
| 11/18/2004 | US20040228048 Fireguard circuit |
| 11/18/2004 | US20040227483 Motor drive apparatus and method of controlling an operation on the same |
| 11/18/2004 | DE20122233U1 Electronically controlled three-phase rotary current motor with variable speed in a star connected three-phase system has thermal switches for protecting wire-wound coils against overheating. |
| 11/18/2004 | DE19540625B4 Schutzschaltung und Einrichtung zur Überwachung von Geräte- und/oder Maschinentemperaturen Protection circuit and device for monitoring equipment and / or machinery temperatures |
| 11/18/2004 | DE10014073B4 Sicherheitsgerät für motorbetriebene Fenster Safety device for motorized window |
| 11/17/2004 | EP1478085A2 Movable barrier operator having force and position learning capability |
| 11/17/2004 | EP1478071A2 Method for monitoring a power output stage |
| 11/17/2004 | EP1476627A1 Method for recognising an obstructive situation in a motor driven element |
| 11/17/2004 | CN2657286Y Oil field high pressure water filling pump full automatic multi power drive and dispense device |
| 11/17/2004 | CN2657255Y Seat-stand type intelligent foreward-counter rotating AC motor protector |
| 11/17/2004 | CN2657254Y Seat-stand type intelligent AC motor protector |
| 11/17/2004 | CN1176515C Output overvoltage protector for stepdown converter |
| 11/16/2004 | US6819535 Device for protecting loads supplied by an alternator |
| 11/16/2004 | US6819534 Three-in-one protection circuit against out-rush current, short circuit and overload |
| 11/11/2004 | WO2004098013A2 Method and apparatus for electrical power transfer |
| 11/11/2004 | US20040222772 Control apparatus and control method of generator for vehicle |
| 11/11/2004 | US20040222766 Inverter for an electric machine |
| 11/11/2004 | US20040222759 Power window driving device |
| 11/11/2004 | DE102004019855A1 Verfahren und Vorrichtung zum Betreiben eines Motors einer beweglichen Barriere Method and apparatus for driving a motor of a movable barrier |
| 11/10/2004 | EP1475884A2 Auto-protected power modules and methods |
| 11/10/2004 | EP1475875A2 Method and device to monitor a power output stage |
| 11/10/2004 | CN2655517Y Device for extracting breaking fault signal of feedback circuit of winding electric machine rotor |
| 11/10/2004 | CN2655486Y Flame-proof small switch for mine |
| 11/10/2004 | CN2655355Y Protector for prepaying system with power supply battery |
| 11/10/2004 | CN2655020Y Polymer lithium cell mine lamp with inserted charge and discharge control and protection system |
| 11/10/2004 | CN1545181A Safety operation monitoring system and method for down-hole electric network |
| 11/10/2004 | CN1545180A Transient unbalance protecting method of capacitor |
| 11/10/2004 | CN1545179A Transformer differential protection difference stream and differential protection instantaneous TA abnormal state identification protecting method |
| 11/10/2004 | CN1545178A Inverse time lag overexcitation protecting method of transformer |
| 11/10/2004 | CN1545177A Harmonic overload protecting method for reactor |
| 11/10/2004 | CN1545176A High-voltage shunt reactor protecting method between turns |
| 11/09/2004 | US6816757 Control unit for a power-distribution network |
| 11/09/2004 | US6815933 Voltage regulator for alternator and method of controlling power generation of alternator |
| 11/04/2004 | WO2004094178A1 Traction transformer and method for monitoring an operating status of a traction transformer |
| 11/04/2004 | US20040218320 Motor control circuit overcurrent protection |