| 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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| 02/23/1994 | CN2157615Y Demagnetisation protection arrangement for electronic transformer |
| 02/23/1994 | CN2157614Y Multifunctional protector for motor |
| 02/17/1994 | WO1994003968A1 Power window driving controller |
| 02/17/1994 | DE4301958A1 Schutzeinrichtung für einen elektrischen Verbraucher Protection device for an electrical load |
| 02/17/1994 | CA2141311A1 Apparatus for driving and controlling power window |
| 02/16/1994 | EP0582966A1 Apparatus for controlling driving of power window system |
| 02/16/1994 | CN1082256A Surge arrestor fail safe thermal overload mechanism |
| 02/14/1994 | CA2101499A1 Input protection circuit for power converter |
| 02/09/1994 | CN2155639Y Solid-state open-phase protector for electric motors |
| 02/08/1994 | US5285366 Current limit circuit in current mode power supplies |
| 02/08/1994 | US5285344 Overvoltage protection device |
| 02/03/1994 | DE4324658A1 Drive control circuit for automobile opening lock for side window or sun-roof - uses measuring resistances in respective earth lines for different motor rotation directions coupled to control microcomputer |
| 02/02/1994 | EP0581509A1 A system for controlling movement of a member driven by an electric motor |
| 02/02/1994 | EP0581172A1 Method for limiting current and arrangement |
| 02/02/1994 | EP0581015A2 Method for determining fault currents on transmission lines and a fault current filter for carrying out the method |
| 02/02/1994 | CN2155094Y Low-voltage protective controlling device for electrical machinery |
| 02/02/1994 | CN1081504A A compressor Control Cprant |
| 02/02/1994 | CN1023668C Bidirectional dc power controller with fault protection |
| 02/01/1994 | US5283708 Overload current protection apparatus |
| 02/01/1994 | US5283516 Low voltage dimmer with no load protection |
| 01/26/1994 | EP0580270A1 Circuit for controlling a pole-changer |
| 01/26/1994 | EP0579727A1 Garage door operator safety apparatus. |
| 01/26/1994 | CN2154559Y Electric saving protector for a.c. asynchronous electrical machinery |
| 01/26/1994 | CN2154552Y Anti-exploisive reactive compensation vacuum electromagnet starter |
| 01/26/1994 | CN1081288A Temperature rise protector for rare-earth electric motor |
| 01/25/1994 | US5282124 Power unit having overcurrent/undervoltage-responsive protective function |
| 01/20/1994 | WO1994001909A1 Current limiters in power utility applications |
| 01/20/1994 | DE4223369A1 Electrical energy supply device for rail vehicle - monitors load thyristor current to control short-circuit thyristor across load thyristors |
| 01/20/1994 | DE4223216A1 Safety operation circuit for electromotor used for accelerator pedal function - triggers emergency function upon detection of power fault or failure to initiate braking action using drive stage diode arrangement. |
| 01/19/1994 | EP0579561A1 Protection circuit for power components against overvoltages |
| 01/19/1994 | EP0579133A1 Superconducting magnet abnormality detection and protection apparatus |
| 01/19/1994 | CN2153896Y Phase-failure superheat protector for three-phase motor |
| 01/19/1994 | CN2153895Y Leakproof phase-failure protective switch |
| 01/19/1994 | CN2153894Y Protector for single phase electric tool armature |
| 01/18/1994 | US5280228 Inverter circuit |
| 01/18/1994 | US5279165 Method and device for the measurement of wind-related stresses on a rotating system |
| 01/18/1994 | CA1326280C Motor-powered opening/closing apparatus for a window or door |
| 01/13/1994 | DE4241066C1 Automatische Laststromrückregelung Automatic load current feedback control |
| 01/12/1994 | EP0578123A2 Fault locator for a transmission line |
| 01/12/1994 | EP0445252B1 Device for protecting a fluorescent tube installation |
| 01/12/1994 | CN2153168Y Short protection charger |
| 01/12/1994 | CN2153166Y Comprehensive protector for accumulator electric locomotive |
| 01/12/1994 | CN2153165Y Multifunctional electicity-saving protector for motor |
| 01/12/1994 | CN2153164Y Multifunctional motor protector |
| 01/11/1994 | US5278480 Door opener control with adaptive limits and method therefor |
| 01/11/1994 | US5278380 Superconducting magnet system with inductive quench heaters |
| 01/06/1994 | WO1994000901A1 Overtemperature sensing and signaling circuit |
| 01/06/1994 | WO1994000900A1 Logic level current and voltage independent restraint system |
| 01/06/1994 | WO1994000864A1 Surge arrestor fail safe thermal overload mechanism |
| 01/06/1994 | WO1994000862A1 Trip energy monitor |
| 01/06/1994 | CA2139327A1 Surge arrestor fail safe thermal overload mechanism |
| 01/06/1994 | CA2115569A1 Logic level current and voltage independent restraint system |
| 01/06/1994 | CA2115358A1 Trip energy monitor |
| 01/05/1994 | EP0577229A1 Apparatus for providing distance protection and distance measurement for a high voltage transmission line |
| 01/05/1994 | EP0576883A2 Active surge rejection circuit |
| 01/05/1994 | EP0576706A1 Power-supply circuit with at least two outputs |
| 01/05/1994 | CN2152336Y Motor protector |
| 01/05/1994 | CN2152335Y Multifunction motor protector |
| 01/05/1994 | CN2152334Y Double loop motor protector |
| 01/05/1994 | CN2152333Y Full function protector for asynchronous motor |
| 01/05/1994 | CN2152332Y Motor protector |
| 01/05/1994 | CN2152331Y Thermal-sensitive over-temperature breaker for motor |
| 01/04/1994 | US5276697 Laser diode automatic power control circuit with means of protection of the laser diode |
| 01/04/1994 | CA1325826C Equipment for and methods of locating the position of a fault on a power transmission line |
| 12/29/1993 | EP0576271A2 Inverter protection device |
| 12/29/1993 | CN2151568Y Phase controller of magnetic starter |
| 12/29/1993 | CN2151567Y Speed controlling-failure protector for thyristor DC transmission |
| 12/29/1993 | CN2151566Y Open-phase protector for three-phase ac motor |
| 12/29/1993 | CN2151565Y Complex protector for electric coal drill |
| 12/29/1993 | CN2151564Y Automatic banlance controlling protector for motor |
| 12/29/1993 | CN2151563Y Enhanced overvoltage protector for generator rotor |
| 12/29/1993 | CN1080097A Portable SCR frequency converter for gasoline generator set |
| 12/29/1993 | CN1080058A Ground detecting method for inverter device |
| 12/22/1993 | CN2150676Y Self-protective electronic regulator for power generator |
| 12/22/1993 | CN2150674Y Electronic energy-saving starting protector for AC. electric motor |
| 12/22/1993 | CN2150673Y Speed-regulating switch for electric implement |
| 12/22/1993 | CN2150655Y Safety protecting instrument for AC motor |
| 12/22/1993 | CN2150654Y Power-off protector for motor |
| 12/22/1993 | CN2150653Y Digital over-current phase-loss protector for electric motor |
| 12/22/1993 | CN2150652Y Protector for three-phase motor without power supply |
| 12/22/1993 | CN1079849A Power converting apparatus with power regenerative control function |
| 12/21/1993 | US5272617 Apparatus for detecting short-circuit for use in bi-polar d.c. transmission system |
| 12/21/1993 | US5272399 Circuit limiting the load current of a power MOSFET |
| 12/21/1993 | US5272392 Current limited power semiconductor device |
| 12/21/1993 | US5272387 Connecting device of an external electrical power supply source to an aircraft on the ground |
| 12/21/1993 | US5272380 Electrical supply control system for a motor vehicle |
| 12/16/1993 | DE4319254A1 Regenerative power control for current regulator - blocks operation of upper or lower arm of rectifier stage when regenerative current is above given reference current |
| 12/16/1993 | DE4231806C1 Blocking detection system for rotary pump driven by AC mains operated electric motor - interrupts drive current over single cycle of AC voltage, applies half-cycle voltage and evaluates induced voltage measured during interruption of subsequent half=cycle. |
| 12/16/1993 | DE4218749A1 Control system for 3-point current regulator - reduces current upon detection of overcurrent until disconnection via transistor control voltage |
| 12/15/1993 | EP0574300A1 Controlling and self-monitoring system, especially for a multipolar device such as a high-voltage circuit breaker |
| 12/15/1993 | CN2149721Y Energy-saving and protection switch for electric motor |
| 12/15/1993 | CN2149709Y Protector for electric motor against phase interruption |
| 12/15/1993 | CN2149708Y Automatic protector for electric motor |
| 12/15/1993 | CN2149707Y Protector for pump against phase interruption of water interruption |
| 12/15/1993 | CN2149706Y Protector for electric motor |
| 12/15/1993 | CN2149705Y Over-hot protector for electric motor |
| 12/15/1993 | CN2149704Y Protector for transformer |
| 12/15/1993 | CN1079588A Cross-bridge type open-phase protection circuit of power supply and its protection device |
| 12/15/1993 | CN1023169C Fast connecting protector for pulse laser device |
| 12/14/1993 | US5270622 Brushless motor control system |