| 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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| 07/22/2009 | CN101488660A Adaptive determination method for differentiating inrush current and failure current of transformer |
| 07/22/2009 | CN101488659A Method for predicting inrush current of three-phase electric power transformer |
| 07/22/2009 | CN100517900C Channel monitoring method of high reliability circuit longitudinal differential protection |
| 07/22/2009 | CN100517899C Protective circuit for power converter |
| 07/22/2009 | CN100517898C Protector for vehicle electric seat |
| 07/22/2009 | CN100517897C Direct current current-limiting device of neutral point of grounding transformer |
| 07/22/2009 | CN100517895C Electrostatic discharge circuit and method therefor |
| 07/21/2009 | US7564704 Method of forming a power supply controller and structure therefor |
| 07/21/2009 | US7564663 Active limiter with integrated sensor |
| 07/21/2009 | US7564662 Overload protection system for an electromagnetic lift |
| 07/16/2009 | WO2009088156A1 The circuit apparatus for protecting a pre-charge resistance using an inter-lock switch |
| 07/16/2009 | WO2009086990A1 Method for the detection of a thermal overload situation in a hand-held power tool |
| 07/16/2009 | US20090179618 Rechargeable battery pack |
| 07/16/2009 | DE10028445B4 Verfahren zur Steuerung der Verstellbewegung eines mittels eines Elektromotors bewegten Teils einer Schließvorrichtung in einem Fahrzeug Method for controlling the adjusting movement of a moving means of an electric motor part of a closing device in a vehicle |
| 07/15/2009 | EP2079142A1 Rechargeable battery pack |
| 07/15/2009 | EP2079141A1 Starting device for an electromotor with integrated safety technology |
| 07/15/2009 | CN201274407Y Overvoltage protector used for automobile generator |
| 07/15/2009 | CN101483338A Periodic waveform sampling data compression system and method for electric power system |
| 07/15/2009 | CN101483337A Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line |
| 07/15/2009 | CN101483336A Method for enhancing electricity transmission capability of partial electric grid |
| 07/15/2009 | CN101483335A Highly integrated battery protection circuit |
| 07/15/2009 | CN101483334A Voltage equalizing protection control circuit for series IGBT |
| 07/15/2009 | CN101483333A Short circuit protection apparatus for electricity generator |
| 07/15/2009 | CN101483332A Phase differential protection method for sampling value differential starting |
| 07/15/2009 | CN101483326A Live conductor stringing and splicing method and apparatus |
| 07/15/2009 | CN101483325A Live conductor stringing and splicing method and apparatus |
| 07/15/2009 | CN101483324A Live conductor stringing and splicing method and apparatus |
| 07/15/2009 | CN100514790C Wide area relay protection method based on augmented state estimation |
| 07/15/2009 | CN100514789C Rectifier with quick disjunction inductive load |
| 07/15/2009 | CN100514788C Overpower protection device |
| 07/15/2009 | CN100514787C Apparatus for detecting over current of dual motor in vehicle |
| 07/15/2009 | CN100514786C Passive zero breaking automatic de-excitation device and method |
| 07/15/2009 | CN100514784C Digital relay protector |
| 07/15/2009 | CN100514743C Battery protection device and system, and battery protection method |
| 07/14/2009 | US7561450 Protection device for a converter and related method |
| 07/14/2009 | US7561449 DC-AC converter and method for protecting DC-AC converter from overcurrent |
| 07/14/2009 | US7561398 Anti-surge power adapter |
| 07/14/2009 | US7561396 Apparatus for monitoring open state of the secondary terminals of a current transformer |
| 07/14/2009 | US7561394 System and method for overvoltage protection |
| 07/14/2009 | US7561392 Intrinsically safe data transmission device |
| 07/14/2009 | US7561390 Protection circuit in semiconductor circuit device comprising a plurality of chips |
| 07/14/2009 | US7560907 Charging system for field devices |
| 07/09/2009 | WO2009085438A1 Method and device for preventing damage to a semiconductor switch circuit during a failure |
| 07/09/2009 | WO2009083306A1 Device and method for taking a safety precaution in an electrical tool |
| 07/09/2009 | WO2009083305A1 Device for determining sluggishness or a blocked state of an electric motor |
| 07/09/2009 | US20090175060 Power transmission control device, non-contact power transmission system, power transmitting device, electronic instrument, and waveform monitor circuit |
| 07/09/2009 | US20090174978 Switching power supply device |
| 07/09/2009 | US20090174353 Motor control device |
| 07/09/2009 | US20090174351 Method for Determining the Magnet Temperature in Synchronous Machines |
| 07/09/2009 | DE102008038345A1 Fehlererfassungsvorrichtung Error detection device |
| 07/09/2009 | DE102007055071B3 Kurzschlussbegrenzungsvorrichtung in einer Niederspannungsanlage Short-circuit limiting device in a low voltage system |
| 07/09/2009 | DE102005006867B4 Halbleiterschalter mit Spannungsüberwachung Semiconductor switch with voltage monitoring |
| 07/08/2009 | EP2077612A2 System and method for suppressing DC link voltage buildup due to generator armature reaction |
| 07/08/2009 | CN201270413Y 距离保护装置 Distance protection |
| 07/08/2009 | CN201270412Y Temporary energy consumption general distribution box leakage protection and control apparatus for construction |
| 07/08/2009 | CN201270411Y Overload protection apparatus used for signal generator |
| 07/08/2009 | CN201270410Y Motor protecting controller |
| 07/08/2009 | CN101478150A Intelligent diagnosis method and apparatus for power transmission and distribution line state |
| 07/08/2009 | CN101478149A Wire selection method for power distribution network single phase earthing failure based on transient signal |
| 07/08/2009 | CN101478148A Failure direction determination process for electric system AC electricity transmission line |
| 07/08/2009 | CN101478147A Zero sequence synthetic impedance longitudinal linkage protection determination process |
| 07/08/2009 | CN101478146A Digital transforming plant protecting controlling method and multifunctional protection controller |
| 07/08/2009 | CN101478145A Multi-loop circuit feedback signal protecting circuit apparatus |
| 07/08/2009 | CN101478144A Automatic protective circuit for charging device and method thereof |
| 07/08/2009 | CN101478143A Active protective circuit for protecting series operation of semi-conductor device |
| 07/08/2009 | CN101478142A Power switch tube protecting circuit in semi-bridge induction heating circuit |
| 07/08/2009 | CN101478141A Synthetic protector for intelligent motor |
| 07/08/2009 | CN100511960C Integrated electromagnetic starter |
| 07/08/2009 | CN100511908C Stable status zero-sequence current increase and assistance device and method |
| 07/08/2009 | CN100511907C Power supply apparatus for vehicle |
| 07/08/2009 | CN100511905C Method and apparatus for ground fault protection |
| 07/07/2009 | US7558091 Switching power supply apparatus |
| 07/07/2009 | US7558090 System for transferring an alternating voltage into a direct voltage |
| 07/07/2009 | US7558086 Inverter control circuit with a resonant frequency modulation function |
| 07/07/2009 | US7558084 Switching mode power supply with compensated propagation delay |
| 07/07/2009 | US7558038 Field upgradeable circuit breaker firmware and programmer therefor |
| 07/07/2009 | US7558037 Over current protection circuit and method |
| 07/07/2009 | US7558033 Arc fault circuit interrupter and method of parallel and series arc fault detection |
| 07/07/2009 | US7558032 Protection system for medium-voltage potential transformers |
| 07/07/2009 | US7558031 Intelligent automatic bypass for a motor control device |
| 07/07/2009 | US7557660 Power amplification device |
| 07/07/2009 | US7557460 Electric power source for motor vehicle |
| 07/02/2009 | US20090168472 Apparatus, system, and method for a low cost self-healing power supply |
| 07/02/2009 | US20090168471 Circuit device having a free wheeling diode, circuit device and power converter using diodes |
| 07/02/2009 | US20090168470 Fault-sensing and protecting apparatus for soft start circuit of inverter and method for the same |
| 07/02/2009 | US20090168469 Apparatus, system, and method for a low cost fault-tolerant power supply |
| 07/02/2009 | US20090168276 Protection of Polarity-Sensitive Components Connected In Parallel With A Direct Current Motor Or Inductor |
| 07/02/2009 | US20090168275 Short protection device for alternator |
| 07/02/2009 | US20090167256 System and method for suppressing DC link voltage buildup due to generator armature reaction |
| 07/02/2009 | US20090167220 Motor control apparatus, vehicle fan drive apparatus, and motor control method |
| 07/02/2009 | US20090167186 LEDs tricolor power signal |
| 07/02/2009 | DE102008054502A1 ESD Schutzschaltung ESD protection circuit |
| 07/02/2009 | DE102007062727A1 Vorrichtung und Verfahren zum Ergreifen einer Sicherungsmaßnahme bei einem Elektrowerkzeug Apparatus and method for gripping a safety measure in a power tool |
| 07/02/2009 | DE102007062724A1 Vorrichtung zur Bestimmung einer Schwergängigkeit oder eines Blockierfalls eines Elektromotors Means for determining a binding or blocking If an electric motor |
| 07/02/2009 | DE102007029905B4 Verfahren zum Betreiben eines elektrischen Transformators A method of operating an electrical transformer |
| 07/02/2009 | CA2615401A1 Transmission line power storage system |
| 07/01/2009 | CN201266835Y Protection device for MH-Ni battery set |
| 07/01/2009 | CN201266834Y Battery module |
| 07/01/2009 | CN201266833Y On-line pre-detection circuit and device for protection of shorted to earth of frequency changer output end |
| 07/01/2009 | CN201266832Y Protection observe and control device for high-voltage motor |