| 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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| 09/14/1993 | US5245495 Automatic flashover protection for locomotive traction motors |
| 09/08/1993 | EP0559580A1 Connecting block for middle voltage relays with current sensors |
| 09/08/1993 | EP0559526A1 Device for monitoring the phases of a three-phase, converter-controlled motor |
| 09/08/1993 | CN2141945Y Loss-of-phase protector for ac three phase motor |
| 09/08/1993 | CN2141944Y Full-automatic electronic protective switch for motor |
| 09/08/1993 | CN1076060A Simple protective device for motor |
| 09/07/1993 | US5243243 Electric motor insulation resistance fault monitor |
| 09/02/1993 | WO1993017344A1 Control system for regulating motor speed including electronic speed detection |
| 09/01/1993 | EP0557850A2 Circuit arrangement for limiting the load current of a power MOSFET |
| 09/01/1993 | CN2141615Y 单相电机保护器 Single-phase motor protection |
| 09/01/1993 | CN1075834A Protection unit of short circuit of accumulator |
| 08/31/1993 | US5241443 Transformer fault protection device |
| 08/31/1993 | US5241152 Circuit for detecting and diverting an electrical arc in a glow discharge apparatus |
| 08/26/1993 | DE4239609A1 Monitoring circuit for devices sensing direction of movement |
| 08/25/1993 | EP0556663A1 Below ground current sensing with current input to control threshold |
| 08/25/1993 | EP0556481A1 Procedure and device for operating a synchronous machine |
| 08/25/1993 | EP0556191A1 Servomotor-control circuit. |
| 08/25/1993 | CN2141140Y Phase-fault and overload protection for three-phase motor |
| 08/25/1993 | CN2141139Y Electric machine protector |
| 08/25/1993 | CN2141138Y Power-saving switch |
| 08/24/1993 | US5239253 Portable engine generator |
| 08/19/1993 | DE4214897C1 Circuit for protection of electronics against transient voltage surges - has detector stage that identifies increase and switches supply to internal arrangement having capacitor and constant current supply |
| 08/18/1993 | CN2140578Y Low power loss negtive sequence voltage phase loss protector |
| 08/18/1993 | CN2140577Y Intelligent energy saving protector for electric motor |
| 08/18/1993 | CN2140576Y Overheat protector for rare-earth dynamo-electric motor |
| 08/18/1993 | CN1021863C Comprehensive protection alarm for three-phase motor |
| 08/18/1993 | CA2088017A1 Method and device for operating a synchronous machine |
| 08/17/1993 | US5237511 Distribution automation smart remote terminal unit |
| 08/17/1993 | CA1321417C Apparatus and method for protecting the contacts of an electrical switch from current surges |
| 08/11/1993 | EP0554553A2 Method of and system for disconnecting faulty distribution line section from power distribution line |
| 08/11/1993 | CN2140110Y Open-phase operating integrated protector for three-phase asynchronous motor |
| 08/10/1993 | US5235505 Overcurrent detector |
| 08/10/1993 | US5235259 Apparatus and method for controlling a motor |
| 08/05/1993 | DE4203467A1 Monitor for single earth faults on insulated electric traction system - has artificial earth point and bridge connected detector circuit with fault indication via independent DC source |
| 08/05/1993 | DE4203299A1 Insulation monitor for intermediate voltage stage of frequency changer e.g. for mining equipment - uses balanced intermediate voltage reference for comparison with threshold and automatic disconnection under fault |
| 08/04/1993 | CN2139746Y Phase-failure overvoltage protector for electric motor |
| 07/29/1993 | DE4242560A1 Overcurrent protection circuit, esp for motor drive circuit semiconductor elements - contains switching device, protection diode and detectors for currents in diode and in switching element |
| 07/29/1993 | DE4201744A1 Extra circuit for LV halogen lamp adaptor - carries out forced interruption of oscillation at end of each mains half-wave |
| 07/29/1993 | DE4201594A1 Transistor controller for motor vehicle fan |
| 07/28/1993 | CN2139320Y Protector for motor phase interruption |
| 07/21/1993 | EP0552002A1 A breaker apparatus for connection between a power line and an external circuit, and a method of operation thereof |
| 07/21/1993 | CN2138858Y Full direction protective economic operation controller of motor |
| 07/21/1993 | CN2138852Y On-line anti-burning switch of motor |
| 07/21/1993 | CN1074561A A breaker apparatus for connection between a power line and an external circuit, and a method of operation thereof |
| 07/21/1993 | CN1074560A Control-break and power-supply circuit and application thereof |
| 07/21/1993 | CN1021681C Device for overvoltage protection of rectifier bridge feeding dc motor and for control of dc motor |
| 07/20/1993 | US5229707 Apparatus and method for eliminating false current limit triggering in a grounded source-emitter power switching circuit |
| 07/20/1993 | US5229695 Controller for automatically stopping motor in response to overcurrent condition |
| 07/14/1993 | EP0551199A2 Electrical insulation and continuity tester |
| 07/14/1993 | EP0551053A1 Stopping device for an induction machine with capacitor |
| 07/14/1993 | EP0550952A1 Single-button actuated self-correcting automatic convertible top |
| 07/14/1993 | EP0335904B1 Multi-phase electronic temperature controller |
| 07/14/1993 | EP0276296B1 Current-limiting circuit |
| 07/13/1993 | US5227964 Switching power supply with overcurrent protection circuit |
| 07/13/1993 | US5227755 Winding configuration for a cryomagnet |
| 07/08/1993 | WO1993013582A1 Flashover between power lines suspended in parallel |
| 07/08/1993 | DE4203654C1 Monitoring three=phase power cable connected to appliance e.g. motor - detecting interruption caused by at least one cable conductor or short circuit between at least two conductors using current source connected to motor supply mains |
| 07/07/1993 | EP0550426A1 Method and device for thermal monitoring of an electric motor on board a vehicle and application to a power-steering system |
| 07/07/1993 | CN2137834Y Multi-function protection device for electric motor |
| 07/07/1993 | CN2137833Y Fully automatic protection device for electric motor |
| 07/06/1993 | US5225815 Monitor for a polyphase rectifier which detects open diodes by sensing a signal below a predetermined threshold |
| 07/06/1993 | US5225747 Single-button actuated self-correcting automatic convertible top |
| 07/06/1993 | US5225395 Supervisory system for superconductive transformer |
| 07/06/1993 | CA1319969C Transformer differential relay |
| 06/29/1993 | US5224011 Multifunction protective relay system |
| 06/24/1993 | WO1993012568A1 Device and process for regulating a generator |
| 06/24/1993 | DE4142569A1 Automobile servomotor steering circuit - has transistor switch controlled by pulse width modulated signal and parallel relay exhibiting lower losses connected across transistor |
| 06/24/1993 | DE4141837A1 Vorrichtung und verfahren zur regelung eines generators Apparatus and method for control of a generator |
| 06/23/1993 | EP0424442B1 Winding arrangement for a cryomagnet |
| 06/23/1993 | CN2137047Y Protector for pressure loss and phase loss of motor |
| 06/23/1993 | CN2137046Y Energy-saving motor automatic protector |
| 06/22/1993 | US5222009 Solid state overload relay |
| 06/22/1993 | US5221888 Current limited temperature responsive circuit |
| 06/22/1993 | US5220814 Clothes washing machine |
| 06/16/1993 | EP0546981A2 Three phase compressor over temperature protection |
| 06/16/1993 | CN2136545Y Full protected motor |
| 06/16/1993 | CN2136544Y Silicon controlled open-phase protector |
| 06/16/1993 | CN2136543Y Protector for motor |
| 06/15/1993 | US5220634 Control circuit for a dc motor |
| 06/15/1993 | US5220494 Protection circuit and method for variable speed drives utilizing phase controlled converters |
| 06/10/1993 | WO1993011597A1 Brushless motor |
| 06/10/1993 | WO1993011595A1 Battery with protection circuit |
| 06/09/1993 | EP0545747A1 Improvements in or relating to batteries and battery systems |
| 06/09/1993 | CN2135860Y Low-voltage leakage selecting protector under coal mine well |
| 06/09/1993 | CN2135859Y Motor phas-lose, voltage-lose operation automatic protector |
| 06/09/1993 | CN2135858Y Ac motor phase-lose protector |
| 06/09/1993 | CN2135857Y Motor comprehensive protector |
| 06/09/1993 | CN2135856Y Three-phase ac motor overheat electronic protector |
| 06/09/1993 | CN1073058A Electricity-saving device for ac induction motor |
| 06/08/1993 | US5218612 Simplified combination laser diode protective circuit |
| 06/08/1993 | US5218521 Method and device for protecting an electrical converter circuit against overload |
| 06/08/1993 | US5218505 Superconductor coil system and method of operating the same |
| 06/08/1993 | US5218339 Arrangement for monitoring a consumer in combination with an internal combustion engine and/or a motor vehicle |
| 06/08/1993 | US5218282 Automatic door operator including electronic travel detection |
| 06/02/1993 | EP0544262A2 Circuit for monitoring a moving object |
| 06/02/1993 | EP0544133A1 Overload disconnection of electric motors for positioner |
| 06/02/1993 | EP0544132A1 Method and device for avoiding the overheating of electric motors |
| 06/02/1993 | EP0543826A1 Process and device for driving an electromagnetic consumer. |
| 06/02/1993 | CN2135211Y Automatic vacuum magnetic starter for mine computer |
| 06/02/1993 | CN2135207Y Open -phase protector |