| 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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| 04/24/2013 | CN202906548U A non-vehicle-mounted DC charging device of an electric vehicle |
| 04/24/2013 | CN202906514U Interaction timing control circuit |
| 04/24/2013 | CN202906508U Control chip of mobile power supply |
| 04/24/2013 | CN202906497U 移动电源 Mobile Power |
| 04/24/2013 | CN202906496U 移动电源 Mobile Power |
| 04/24/2013 | CN202906495U 移动电源 Mobile Power |
| 04/24/2013 | CN202906454U Transformer iron core and clamp multi-point grounding automatic current limiting safety device |
| 04/24/2013 | CN202906452U Optical fiber longitudinal differential protective apparatus of 6 kV auxiliary power system of power plant |
| 04/24/2013 | CN202906451U Low-voltage distribution system with electrical leakage protection apparatus |
| 04/24/2013 | CN202906450U High-voltage transmission line fiber integrated differential protection device |
| 04/24/2013 | CN202906449U Protection circuit for magnetron drive power output rectifier diode |
| 04/24/2013 | CN202906448U Lithium battery protection circuit |
| 04/24/2013 | CN202906447U 逆变器保护电路 Inverter protection circuit |
| 04/24/2013 | CN202906446U Low-loss power output over-current protection circuit |
| 04/24/2013 | CN202906445U Energy supply device for monitoring system |
| 04/24/2013 | CN202906444U Multi-speed motor control protector |
| 04/24/2013 | CN202906443U Novel temperature-sensing air current switch |
| 04/24/2013 | CN202906442U Current transformer overvoltage protector |
| 04/24/2013 | CN103066858A Voltage feedback type half-bridge circuit |
| 04/24/2013 | CN103066836A Switch power supply circuit and control method thereof |
| 04/24/2013 | CN103066820A Switching power supply |
| 04/24/2013 | CN103066819A Insulated gate bipolar transistor (IGBT) over-current protection circuit |
| 04/24/2013 | CN103066759A Single-three phase dual-purpose switching device of engine set |
| 04/24/2013 | CN103066656A Novel onboard emergency power supply |
| 04/24/2013 | CN103066624A Photovoltaic grid-connected inverter low voltage ride through (LVRT) control method |
| 04/24/2013 | CN103066579A Grid fault measuring and control device |
| 04/24/2013 | CN103066578A Method and system of substation area zero sequence current protection |
| 04/24/2013 | CN103066577A Contact net line fault intelligent cutting equipment and system and method |
| 04/24/2013 | CN103066576A Circuit differential motion protection method utilizing harmonic summarized information to prevent saturated maloperation |
| 04/24/2013 | CN103066575A Control method of rapidly finding fault |
| 04/24/2013 | CN103066574A Over-voltage protection (OVP) protection line of multiple groups of voltage |
| 04/24/2013 | CN103066573A Modular multi-level multi-terminal flexible direct current system direct current fault handling method |
| 04/24/2013 | CN103066572A Relay protection on-line monitoring method and device based on prudential system |
| 04/24/2013 | CN103066571A Overload protection method and device of combination switch |
| 04/24/2013 | CN103066570A Battery protection device and server and battery management system |
| 04/24/2013 | CN103066569A Storage battery low-voltage protecting device and storage battery low-voltage protecting system |
| 04/24/2013 | CN103066568A Protective circuit for direct current power output |
| 04/24/2013 | CN103066567A Hierarchical sectional capacity balance control method based on switching number |
| 04/24/2013 | CN103066566A System and method supplying overcurrent protection for power converter based on duty ratio information |
| 04/24/2013 | CN103066565A System for protecting overcurrent and short-circuited circuit |
| 04/24/2013 | CN103066564A Water pump automatic power-off protective method and water pump automatic power-off protective device |
| 04/24/2013 | CN103066563A Intelligent motor protector system |
| 04/24/2013 | CN103066562A Phase sequence protective device for centrifugal machine and motor |
| 04/24/2013 | CN103066561A Relay protective equipment based on chip |
| 04/24/2013 | CN103065512A Metro operation cooperation center (OCC) power dispatching simulating training system |
| 04/24/2013 | CN103061638A Self-learning vehicle door and window controller, self-learning vehicle door and window motor locked-rotor protection method and self-learning vehicle door and window motor locked-rotor protection system |
| 04/24/2013 | CN103053265A Dual-wrapped lithium battery grass cutter |
| 04/24/2013 | CN102160276B Normally-off protection element and control unit provided with same |
| 04/24/2013 | CN102088179B Method for carrying out differential protection on UHVDC (Ultra-High Voltage Direct Current) converter transformer |
| 04/24/2013 | CN102005726B Method for identifying magnetizing inrush current and external fault CT (current transformer) saturation based on waveform discontinuous characteristic |
| 04/24/2013 | CN102005725B Method for identifying excitation inrush current based on amplitude-comparison criterion |
| 04/24/2013 | CN101964516B Three-phase four-wire system zero-line failure and open-phase intelligent protector |
| 04/24/2013 | CN101888179B DC/DC control and drive circuit of hybrid power excavator |
| 04/24/2013 | CN101882781B Method for calculating comprehensive reliability of relay protecting system |
| 04/24/2013 | CN101867174B IGBT short-circuit protection circuit in frequency converter and method thereof |
| 04/24/2013 | CN101755372B Method and protection device for a power network accounting for route switching in a telecommunication network |
| 04/24/2013 | CN101689763B Battery protection IC and battery device |
| 04/24/2013 | CN101488661B Adaptive determination apparatus differentiating transformer exciting surge and failure current |
| 04/24/2013 | CN101471560B Locking detection circuit |
| 04/24/2013 | CN101282078B Method and apparatus for power converter fault condition detection |
| 04/23/2013 | US8427850 Switching power supply device with a switching control circuit |
| 04/23/2013 | US8427846 Inverter circuit having a controller to supply a reactive current on a phase with a voltage drop |
| 04/23/2013 | US8427004 Electric-vehicle controller and power storage unit shutoff switch |
| 04/18/2013 | WO2013055942A1 Depressurization system for an electrical transformer |
| 04/18/2013 | WO2013054567A1 Power conversion device |
| 04/18/2013 | WO2013023753A3 A method of distance protection of parallel transmission line |
| 04/18/2013 | US20130094249 Secondary side synchronous rectification control circuit and switching converter |
| 04/18/2013 | US20130094112 Photovoltaic installation |
| 04/18/2013 | US20130093373 Motor Driving Circuit and Correction Method |
| 04/18/2013 | US20130091887 Refrigerator and integrated relay module of compressor for the same |
| 04/18/2013 | DE102012004577A1 Überspannungsschutzvorrichtung für elektronische Baugruppen A surge protection device for electronic components |
| 04/18/2013 | CA2852052A1 Depressurization system for an electrical transformer |
| 04/18/2013 | CA2850834A1 Fault location using traveling waves |
| 04/17/2013 | EP2580829A1 Breaker failure protection of hvdc circuit breakers |
| 04/17/2013 | EP2580828A1 Fault protection of hvdc transmission lines |
| 04/17/2013 | CN202889282U Control circuit for motor of mixing station |
| 04/17/2013 | CN202888918U Charging protective device for prolonging service life of lead-acid battery |
| 04/17/2013 | CN202888900U Storage battery charging and boosting circuit for online UPS (Uninterrupted Power Supply) |
| 04/17/2013 | CN202888895U Battery pack balancing device and battery pack management system comprising the same |
| 04/17/2013 | CN202888874U Distributed operation power supply |
| 04/17/2013 | CN202888832U Single-power ring network power supply system |
| 04/17/2013 | CN202888814U IGBT short circuit protection soft turn-off circuit |
| 04/17/2013 | CN202888813U Battery reverse connection preventing circuit of charger |
| 04/17/2013 | CN202888812U Charging protection circuit for memory battery |
| 04/17/2013 | CN202888811U Short-circuit protection circuit for lithium ion battery management system |
| 04/17/2013 | CN202888810U Capacitor protection device |
| 04/17/2013 | CN202888809U PFC dual-protection circuit and air-conditioner |
| 04/17/2013 | CN202888808U Push-pull converter current foldback circuit |
| 04/17/2013 | CN202888807U Overcurrent protection circuit and switch power supply for half-bridge circuit |
| 04/17/2013 | CN202888806U Motor directivity current quick-break protection |
| 04/17/2013 | CN202888805U Electrical overload protection circuit of mixing station |
| 04/17/2013 | CN202888804U System for detecting locked rotor in traveling-wave ultrasonic motor during step operation |
| 04/17/2013 | CN202888803U Cooling mixer |
| 04/17/2013 | CN202888802U Coil overheating preventing apparatus of motor and control apparatus of motor |
| 04/17/2013 | CN202888801U Grinding machine low-speed transmission motor protection device |
| 04/17/2013 | CN202888800U Automotive alternator voltage runaway protector |
| 04/17/2013 | CN202888799U Intelligent reactive compensation measuring and control device |
| 04/17/2013 | CN202888788U Overcurrent protection circuit and switching power supply |
| 04/17/2013 | CN202888785U Device for controlling single-phase automatic reclosing operation of ultrahigh-voltage transmission line |
| 04/17/2013 | CN202888310U Cell assembly structure of polymer lithium battery pack |