| 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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| 10/27/1998 | US5828309 Power source miswiring detection apparatus |
| 10/27/1998 | US5828200 Motor control system for variable speed induction motors |
| 10/22/1998 | WO1998047218A1 Switch-mode power supply with over-current protection |
| 10/22/1998 | WO1998047213A1 Method for determining the location of a partial discharge |
| 10/21/1998 | EP0872939A1 Selective electronic trip device, circuit breaker with such a trip device and method for selective tripping |
| 10/21/1998 | CN2295288Y Reactive power automatic compensating box for civil buildings |
| 10/21/1998 | CN1040384C Controlling device and abnormal detecting method of commutatorless electric motor |
| 10/21/1998 | CN1040382C Self-protective motor |
| 10/20/1998 | US5825597 System and method for detection and control of circulating currents in a motor |
| 10/20/1998 | US5825150 Method of detecting, diagnosing and automatically correcting abnormalities in servo control system |
| 10/20/1998 | US5825147 Control system for a vehicle having a moveable vehicle body member |
| 10/15/1998 | WO1998045924A2 Battery protection system |
| 10/15/1998 | WO1998045920A1 Electrical safety device with conductive polymer sensor |
| 10/15/1998 | WO1998045721A1 Method and device for testing differential protection relays or differential protection relay systems |
| 10/15/1998 | CA2286359A1 Electrical safety device with conductive polymer sensor |
| 10/14/1998 | EP0871273A1 Battery protective circuit |
| 10/13/1998 | US5822168 For coupling, alternating power supply lines to a load |
| 10/13/1998 | US5822165 Sequence based network protector relay with forward overcurrent protection and antipumping feature |
| 10/13/1998 | US5822164 Pre-engineered combination starter for multiple motor sizes |
| 10/13/1998 | US5821876 Communication interface for bus connected circuit breakers |
| 10/13/1998 | US5821740 For supplying power to a load from a source |
| 10/13/1998 | CA2127022C Negative-sequence time-overcurrent relay |
| 10/13/1998 | CA2115357C Overtemperature sensing and signaling circuit |
| 10/08/1998 | DE19713748A1 Verfahren und Vorrichtung zur Prüfung von Differentialschutzrelais/-systemen Method and apparatus for testing differential protective relay / systems |
| 10/08/1998 | DE19713448A1 Automatic cut-out device for electrical machine |
| 10/08/1998 | DE19711979A1 Verfahren zur elektrischen Steuerung und Regelung der Bewegung von elektrisch betriebenen Aggregaten Method for electrically controlling and regulating the movement of electrically operated assemblies |
| 10/07/1998 | CN2293916Y Open-phase automatic power-off AC contact device |
| 10/07/1998 | CN2293915Y Protector for electric motor |
| 10/06/1998 | US5818674 Solid state overload relay |
| 10/06/1998 | US5818670 Switching mode power supply with protection function against overcurrent and overvoltage |
| 10/06/1998 | CA2092887C Charge control apparatus and electronic apparatus provided with such a control apparatus |
| 10/01/1998 | WO1998043333A1 Process and arrangement for selective network monitoring for switchgear |
| 10/01/1998 | DE19710073A1 Vorrichtung und Verfahren zum Überspannungsschutz Apparatus and method for overvoltage protection |
| 09/30/1998 | EP0868016A1 Electric power transmission plant, including voltage source converter (VSC) with additional phase leg |
| 09/30/1998 | EP0867999A1 A method and a device for detecting and handling short-circuit phenomena for power semiconductor devices |
| 09/30/1998 | EP0867998A1 A plant for transmitting electric power |
| 09/30/1998 | EP0764276B1 Electric vehicle propulsion system power bridge with built-in test |
| 09/30/1998 | CN2293148Y Multifunctional non-contact protective device for motor |
| 09/29/1998 | US5815387 Transformer protective apparatus having semiconductor and mechanical bypass means |
| 09/29/1998 | US5814955 Motor control circuit with a low voltage monitor |
| 09/29/1998 | US5814954 Method of and an apparatus for protecting a regenerative resistor in an inverter for driving a servomotor |
| 09/29/1998 | US5813110 For upsetting rivets |
| 09/24/1998 | WO1998042066A1 High power inverter pole employing series connected devices configured for reduced stray loop inductance |
| 09/24/1998 | DE19710319A1 Schaltung zum Sperren einer Halbleiterschaltvorrichtung bei Überstrom Circuit for blocking a semiconductor switching device for overcurrent |
| 09/23/1998 | EP0866556A1 Short circuit protection circuit |
| 09/23/1998 | CN2292342Y Multi-function motor protector |
| 09/22/1998 | US5812353 Current limiter for electrical transmission/distribution protection systems |
| 09/22/1998 | US5812013 Method and apparatus for calibrating integrated circuits |
| 09/22/1998 | CA2048722C Protective circuit and protective plug for telecommunication installations |
| 09/19/1998 | CA2231219A1 Short circuit protection circuit |
| 09/17/1998 | WO1998040965A1 Device and method for protection against overvoltages |
| 09/17/1998 | WO1998040947A1 Ground fault protection circuit for a multiple source system |
| 09/17/1998 | WO1998040946A1 Circuit for blocking a semiconductor switching device on overcurrent |
| 09/17/1998 | WO1998040945A1 Method for electronic control and adjustment of the movement of electrically actuated units |
| 09/16/1998 | EP0865152A1 Control unit for refrigerating machine |
| 09/16/1998 | EP0865137A1 Method of controlling the closing procedure of closable devices with at least one part driven by an electric motor |
| 09/16/1998 | CN2291738Y Multi-functional electronic protector for electric machine without external electric supply |
| 09/16/1998 | CN2291737Y Three-phase machine protector |
| 09/16/1998 | CN1193095A Control device for refrigerator |
| 09/15/1998 | US5809045 Method of detecting faults on a power transmission line system |
| 09/15/1998 | US5808848 Digital circuit interrupter shunt trip accessory module |
| 09/15/1998 | US5808846 Combination current sensor and relay |
| 09/15/1998 | US5808844 Current differential protection arrangement |
| 09/15/1998 | US5808441 Microprocessor based motor control system with phase difference detection |
| 09/15/1998 | CA2066099C Multifunction protective relay system |
| 09/10/1998 | DE19707860A1 Contactless monitoring arrangement for rotary machine part |
| 09/09/1998 | EP0863597A1 Power supply |
| 09/09/1998 | EP0863065A2 Electric power steering apparatus |
| 09/09/1998 | EP0862808A1 An installation for power transmission by means of high-voltage direct current, comprising device for detection of a permanent ground fault |
| 09/09/1998 | CN2290951Y Resistance sensitive compound voltage reducing starter of pond excavator set |
| 09/08/1998 | US5805396 Protection circuit of drive system for motor |
| 09/08/1998 | US5805395 Half-cycle summation V/Hz relay for generator and transformer over-excitation protection |
| 09/08/1998 | US5805394 For protecting a load coupled to a power supply system |
| 09/08/1998 | US5805393 Electrical system |
| 09/08/1998 | US5805070 Device for indicating a destroyed arrester |
| 09/08/1998 | US5804944 Battery protection system and process for charging a battery |
| 09/08/1998 | US5802766 Method and apparatus for controlling automatic opening and closing of window of driver's cab of working vehicle |
| 09/03/1998 | WO1998038728A1 Motor reversing circuit |
| 09/03/1998 | DE19804175A1 Automatic door or window operating system with incorporated obstacle detection |
| 09/03/1998 | DE19709766C1 Controlling several coupled end stages esp. with gradient amplifier of nuclear resonance tomography e.g. Project 039 |
| 09/03/1998 | DE19705397A1 Method for protecting electric motor from excessive operating temperature |
| 09/02/1998 | EP0861514A1 Jamming detection device for electrical drives |
| 09/02/1998 | EP0738433B1 Method and device for determining the direction to a fault on a power transmission line |
| 09/02/1998 | CN2290136Y On-off coil protector for circuit braker |
| 09/02/1998 | CN2290135Y On-load voltage regulation mechanism protector for transformer |
| 09/02/1998 | CN1192082A Driving device using for industrial equipment, particularly in the raw material industrial equipment |
| 09/02/1998 | CN1192072A System for preventing vehicle battery from being excessively discharged |
| 09/01/1998 | US5801516 Drive overload protection circuit |
| 09/01/1998 | US5801503 Temperature-compensating overcurrent detection circuit for DC motor |
| 09/01/1998 | US5801501 Arrangement for moving window panes in a motor vehicle |
| 08/27/1998 | WO1998037622A1 A microprocessor-controlled drive unit with limitation of current consumption for electrically operated devices |
| 08/26/1998 | EP0860927A1 Protection circuit arrangement for surge arrester |
| 08/26/1998 | EP0860926A2 Thermally aided power sharing of power supplies with or without an external current share line |
| 08/26/1998 | CN2289331Y Open-phase overload protector for electric motor |
| 08/26/1998 | CN2289330Y Comprehensive protective switch for electric motor |
| 08/26/1998 | CN2289329Y Protector for electric motor |
| 08/26/1998 | CN1191407A 充放电控制电路 Charge and discharge control circuit |
| 08/26/1998 | CN1191304A Device and method for monitoring system environment of outdoor base station |
| 08/25/1998 | US5798932 Methods and apparatus for removing error due to decaying offsets from measured power system currents |
| 08/25/1998 | US5798916 High power inverter pole employing series connected devices configured for reduced stray loop inductance |