| Patents for H02H 3 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection (33,031) |
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| 06/24/1998 | CN1185857A Current transformer, in particular for a fault current tripping device sensitive to pulsating currents and tripping device equipped with such a transformer |
| 06/24/1998 | CN1185676A Three-phase power-supply and power-driven protection and control special circuit |
| 06/24/1998 | CA2225888A1 Ground fault detector for gas discharge tubing |
| 06/24/1998 | CA2193909A1 Ground fault detector for gas discharge tubing |
| 06/23/1998 | US5771162 Electric protective device used in switching mode power supply systems |
| 06/23/1998 | US5770934 Method for the closed-loop control of an automatic door which is propelled by a drive motor |
| 06/18/1998 | WO1998026487A1 Device including a thermally protected switching transistor |
| 06/18/1998 | WO1998026486A1 Power dissipation limiter for high frequency switch |
| 06/18/1998 | WO1998026433A1 Overcurrent protective circuit element |
| 06/18/1998 | DE19653727A1 Switching off of drive motor esp. for rail-bound vehicle |
| 06/17/1998 | EP0848471A2 Earth fault protection device |
| 06/17/1998 | EP0848309A1 Device for monitoring and limiting the static closing force of a door |
| 06/17/1998 | EP0787304A4 Numerical comparator |
| 06/17/1998 | CN2284449Y Fusing protector |
| 06/16/1998 | US5768079 Adaptive ground and phase fault detection for a power distribution system |
| 06/16/1998 | US5768077 Earthing wire disconnection detection apparatus and leakage detection apparatus having an earthing wire disconnection detection function conductor |
| 06/16/1998 | CA2168359C Method and apparatus for rms current approximation |
| 06/10/1998 | CN2283941Y Overcurrent short-circuit overvoltage earth leakage circuit-breaker |
| 06/10/1998 | CN1184566A Differential protection device sensitive to pulsating current |
| 06/10/1998 | CN1184371A DC/DC converter with protection circuit |
| 06/09/1998 | US5764469 Apparatus for protecting eletronic devices in a vehicle's electronic system and for preventing discharge of the vehicle's battery |
| 06/09/1998 | US5764462 Field ground fault detector and field ground fault relay for detecting ground corresponding to DC component extracted ground fault current |
| 06/09/1998 | US5764064 Method and device for identifying single ground faults |
| 06/09/1998 | US5764044 Process for producing time dependent waveforms of positive and negative symmetrical sequence components of a power system's voltages or currents |
| 06/04/1998 | WO1998024162A1 Overcurrent protection systems |
| 06/04/1998 | WO1998024161A1 Electronic shock protection in codsets and electrical distribution systems |
| 06/03/1998 | EP0845853A2 DC/DC converter with a protection circuit |
| 06/03/1998 | EP0845846A1 Device for fault detection and measurement on electrical power lines |
| 06/03/1998 | CN2283327Y Earth leakage protective device |
| 06/03/1998 | CN1183664A Full-automatic single-phase potential error protector |
| 06/02/1998 | US5760566 Control device for stopping the operation of a single-phase asynchronous motor with a capacitor |
| 05/28/1998 | WO1998011641A3 Digital current differential system |
| 05/28/1998 | DE19648905A1 Switching circuit for monitoring three-phase mains safety |
| 05/27/1998 | EP0741927B1 Residual current safety switch |
| 05/27/1998 | CN1182968A Breaker with breaker unit and processing, calibration and communication module |
| 05/26/1998 | US5757598 Ground fault circuit interrupter |
| 05/22/1998 | WO1998009362A3 Power back |
| 05/20/1998 | EP0843332A1 Circuit breaker having a breaker block and modules for processing, calibration and indication |
| 05/20/1998 | EP0777907B1 Electromechanical switching device and arrangement with several such devices |
| 05/20/1998 | EP0630533B1 A short-circuit limiting protector |
| 05/20/1998 | DE19750649A1 Battery charger e.g. for electrical tools |
| 05/20/1998 | DE19645903A1 Electrical protective circuit for model railway layouts |
| 05/20/1998 | CN2282290Y Over load short circuit over voltage leakage protective switch |
| 05/20/1998 | CN2282277Y Safety power source socket for protective household electric appliance |
| 05/20/1998 | CN1182393A AC input cell for data acquisition circuit |
| 05/20/1998 | CN1182392A Continuous input cell for data acquisition circuit |
| 05/20/1998 | CN1182298A Electric power distribution system with automatic protection breakers and related method |
| 05/19/1998 | US5754386 Trip device for an electric powered trip unit |
| 05/19/1998 | US5754384 Overcurrent protection circuitry for non-isolated battery discharge controller |
| 05/19/1998 | US5754383 Faulted circuit indicatior with variable load levelling circuit |
| 05/19/1998 | US5754113 Circuit monitor for plural electrical switching apparatus |
| 05/19/1998 | US5754017 Power window with detecting function of sticking of foreign matter |
| 05/19/1998 | US5753982 Apparatus for supplying power to a peripheral device from computer system |
| 05/14/1998 | WO1998020356A1 Method of detecting and locating a high-resistance earth fault in an electric power network |
| 05/13/1998 | CN2281603Y Multifunctional distributing box for school |
| 05/13/1998 | CN2281599Y Electronic protector |
| 05/13/1998 | CN1181847A Electrical differential protection appts. with a test circuit |
| 05/13/1998 | CN1181650A Intelligent three-phase protective solid relay |
| 05/13/1998 | CN1181335A Electricity leakage alarm for ship |
| 05/12/1998 | US5752047 Modular solid state power controller with microcontroller |
| 05/12/1998 | US5751532 Intergrating reset overcurrent relay |
| 05/12/1998 | US5751531 Protection circuit against high energy overvoltages, having a controlled clipping voltage |
| 05/12/1998 | US5751530 High power DC blocking device for AC and fault current grounding |
| 05/12/1998 | US5751524 Ground fault protection circuit for a multiple source system |
| 05/12/1998 | US5751284 Current signal correction process and device |
| 05/06/1998 | EP0839401A1 Electrical apparatus |
| 05/06/1998 | CN2281029Y Lightning-protection overvoltage protective moudel for power supply |
| 05/06/1998 | CN2281027Y Low-voltage power-supply circuit protector |
| 05/06/1998 | CN2280911Y Multifunction electri meter |
| 05/06/1998 | CN1038228C Electric potential treating instrument |
| 05/05/1998 | US5748423 System for limiting short circuit current in 3-phase electric power networks |
| 05/05/1998 | US5748422 Power latch circuit with overvoltage protection |
| 04/29/1998 | EP0838887A2 Electric power distribution system with automatic protection breakers and related method |
| 04/29/1998 | EP0838103A1 Electrical fault interrupt with frayed cord protection |
| 04/29/1998 | EP0782788B1 Method and device for monitoring at least two redundant control channels for an electric-generator exciter |
| 04/29/1998 | CN2280378Y Arrangement for automatic protecting of three phase electricity from interruption |
| 04/29/1998 | CN1180258A Failsafe system using power off relay and control method thereof |
| 04/28/1998 | US5745322 Circuit protection arrangements using ground fault interrupter for overcurrent and overvoltage protection |
| 04/28/1998 | US5745114 Graphical display for an energy management device |
| 04/28/1998 | CA2133864C Apparatus for detecting the amplitude and phase of an a.c. signal |
| 04/23/1998 | DE19634948C1 Netzgerät Power Supply |
| 04/22/1998 | CN2279724Y Leakage breaker with zero line detection function |
| 04/22/1998 | CN2279613Y Detecting device for phase-defect of motor |
| 04/21/1998 | US5742513 Methods and systems for automatic testing of a relay |
| 04/16/1998 | DE19640997A1 Overvoltage protection system |
| 04/15/1998 | CN2279024Y 三相四线制供电线路“断零”保护装置 Three-phase four-wire power line "off zero" protection device |
| 04/15/1998 | CN2279023Y Intelligent central controlled residual current action protecting device |
| 04/15/1998 | CN2279022Y Device for preventing fraudulent use of electricity |
| 04/15/1998 | CN2279021Y Isolated single phase protection switch |
| 04/15/1998 | CN2279013Y 定时插座 Timing socket |
| 04/15/1998 | CN1038026C Method and apparatus for operating spinning machine producing cross reel |
| 04/14/1998 | US5740027 Trip device for an electric powered trip unit |
| 04/09/1998 | WO1998015046A1 Electronic overcurrent release with a circuit to prepare a measuring signal for phase currents |
| 04/09/1998 | DE19641187A1 Schaltungsanordnung zur Energieversorgung von elektronischen Auslöseeinrichtungen Circuit arrangement for supplying power to electronic triggering devices |
| 04/09/1998 | DE19641185A1 Schaltungsanordnung zur Stromerfassung in Stromleitern zur Ansteuerung elektronisch steuerbarer Auslöseeinrichtungen Circuit arrangement for current detection in power conductors for controlling electronically controllable release mechanisms |
| 04/09/1998 | DE19640821A1 Earth fault identification process for power distribution network |
| 04/08/1998 | EP0834976A2 Circuit with electronic fuse |
| 04/08/1998 | EP0834975A1 Electrical distribution terminal with hybrid limiter block |
| 04/08/1998 | EP0834209A1 Electric power distribution unit for buildings |
| 04/08/1998 | CN2278300Y Comprehensive monitoring controller for power subscriber |