| 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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| 04/06/1993 | CA1315846C Apparatus for providing distance protection and distance measurement for a high voltage transmission line |
| 03/31/1993 | EP0534599A2 Automatic control system |
| 03/31/1993 | EP0533972A1 Protection device for protection measures against earth fault currents |
| 03/31/1993 | EP0298092B1 Circuit breaker trip solenoid assembly |
| 03/31/1993 | CN2129043Y Auto protection arrangement for phase interruption |
| 03/31/1993 | CN2129042Y Electric central connection device for automobile |
| 03/31/1993 | CN1070521A Driving device capable of protecting transistor switch |
| 03/31/1993 | CN1070518A Device for protecting power supply circuit |
| 03/30/1993 | US5198957 Transient protection circuit using common drain field effect transistors |
| 03/30/1993 | CA1315383C Control circuit with validity-determining arrangement |
| 03/30/1993 | CA1315382C Ground fault detector |
| 03/25/1993 | DE4231163A1 Fehlertolerantes mehrstations-uebertragungssystem A fault-tolerant more stations-transmission system |
| 03/24/1993 | CN2128791Y Safety device for preventing leakage and stealing-electricity |
| 03/24/1993 | CN2128790Y Wide range monitoring control anti-stealing electricity device |
| 03/23/1993 | US5196980 Low impedance, high voltage protection circuit |
| 03/23/1993 | US5196832 Electric power system with line failure detection |
| 03/23/1993 | US5196831 Electric switchgear equipment with detection of unauthorized changes to the setpoints |
| 03/23/1993 | US5196656 Elevator door control apparatus |
| 03/23/1993 | CA1314969C Out-of-step blocking unit |
| 03/20/1993 | CA2078646A1 Fault tolerant multi-drop communications system |
| 03/18/1993 | DE4229303A1 Rectifier with independent magnetic amplifiers - has control circuits with series connected phase control group coils |
| 03/17/1993 | EP0531995A2 An AC/DC rectifier power source |
| 03/17/1993 | EP0531601A1 An automatic circuit breaker for protecting multi-phase electric circuits |
| 03/17/1993 | CN2128425Y Energy-saving current limiter |
| 03/16/1993 | US5195012 Electronic trip device comprising an improved long delay function |
| 03/16/1993 | US5195009 Current summing arrangement for ground fault detection |
| 03/16/1993 | US5195008 Differential current circuit breaker and a method of setting the tripping ranges |
| 03/16/1993 | US5195007 Engine-driven power generating system |
| 03/11/1993 | DE4129679A1 Current supply with polarity monitoring for communications appts. - detects DC voltage short-circuit to control output voltage regulator |
| 03/10/1993 | EP0530563A1 Low-voltage guse-link |
| 03/09/1993 | US5193042 Automatic energizing damping device |
| 03/09/1993 | CA1314321C Solid-state trip device comprising an instantaneous tripping circuit independent from the supply voltage |
| 03/09/1993 | CA1314311C Mos ic reverse battery protection |
| 03/06/1993 | CA2071397A1 Control apparatus for detecting and commutating fault currents in an alternator-fed dc power supply |
| 03/03/1993 | EP0529750A2 Control method for overcurrent trip devices in dc circuit breakers |
| 03/03/1993 | CN1069616A Circuit of fluorescent lamp electronic ballast |
| 03/02/1993 | US5191501 Fast lamp current limiting apparatus and method |
| 03/02/1993 | US5191499 Method and apparatus for current interruption in electrically-powered apparatus and equipment |
| 03/02/1993 | US5191279 Current limiting method and apparatus |
| 03/02/1993 | CA1314074C Instantaneous voltage drop detector for dc power source |
| 02/25/1993 | DE4128394A1 Electrical power network monitoring equipment - contains electromechanical pulse transducers, and switch with two electromagnets and diaphragm moving contact bolt to send pulses to computer for evaluation |
| 02/25/1993 | DE4127392A1 Current and-or voltage limiter monitor - contains parallel current and-or series voltage limiters with individual switching and current and-or voltage sensors |
| 02/24/1993 | EP0513349A4 Method and device for radio-navigational determinations using artificial earth-satellites |
| 02/24/1993 | CN2127540Y Single, multi-lamp electronic ballast with protector |
| 02/24/1993 | CN2127520Y Automatic circuit breaker |
| 02/23/1993 | US5189589 Power controller |
| 02/18/1993 | WO1993003530A1 Process and arrangement for recognizing defects in power converters |
| 02/18/1993 | WO1993003529A1 Fuse structure |
| 02/18/1993 | CA2114543A1 Process and arrangement for recognizing defects in power converters |
| 02/17/1993 | CN1019908C Safety apparatus for elevator |
| 02/16/1993 | US5187631 For controlling the power supply of an electrical load |
| 02/10/1993 | EP0324012B1 Shorted-coaxial-cable detector for local-area networks |
| 02/10/1993 | CN1068914A Electric shock protector with self-testing function |
| 02/09/1993 | US5185705 Circuit breaker having serial data communications |
| 02/03/1993 | EP0526071A2 Switch mechanism |
| 02/03/1993 | EP0525428A1 Digital protective relay apparatus |
| 02/03/1993 | EP0270622B1 Electronic control system, in particular for a printer |
| 01/28/1993 | DE4124344A1 Current monitor for LV lighting systems - has reference value forming circuit producing at least one level varying according to supply voltage |
| 01/28/1993 | DE4124321A1 Over-load voltage protection circuit - has thermal fuse switch that responds if first varistor fails to establish second varistor path to ground |
| 01/27/1993 | EP0524300A1 Protection device for electrical equipment, machines and installations |
| 01/27/1993 | EP0443011A4 Processor controlled circuit breaker trip system having an intelligent rating plug |
| 01/21/1993 | WO1993001639A1 Circuit protection arrangement |
| 01/21/1993 | DE4124190A1 Network protection circuit for monitoring and isolating due to fault - measures current difference between at least one outgoing lead and neutral lead to detect fault or earth leakage |
| 01/21/1993 | DE4121610A1 Release and signalling device for earth detector module - uses signalling relay set and reset in conjunction with electromagnetic rapid release switch |
| 01/21/1993 | CA2111966A1 Circuit protection arrangement |
| 01/20/1993 | EP0524142A1 Electronic trip circuit for earth leakage circuit breaker |
| 01/20/1993 | CN2126598Y Double protective fully automatic voltage stabilizer for household electric appliance |
| 01/20/1993 | CN1068220A Antijamming circuit for overvoltage protection of electric applicance |
| 01/20/1993 | CA2070509A1 Electric switchgear equipment with detection of unauthorized changes to the setpoints |
| 01/19/1993 | USRE34163 Symmetrical fault current detector |
| 01/19/1993 | US5181155 Overcurrent trip circuit |
| 01/19/1993 | US5180965 Direct-current power source circuit with back gate control circuit for power MOS-FET |
| 01/13/1993 | EP0522187A1 Ground fault circuit interrupter |
| 01/12/1993 | US5179495 Solid state overload relay |
| 01/12/1993 | US5179494 Excess voltage protection apparatus for an electric vehicle |
| 01/12/1993 | US5179493 Multiple power supply system |
| 01/12/1993 | US5179489 Method and means for suppressing geomagnetically induced currents |
| 01/12/1993 | US5179488 Process control instrument with loop overcurrent circuit |
| 01/12/1993 | CA1312653C Apparatus and method for reducing transient exponential noise in a sinusoidal signal |
| 01/12/1993 | CA1312651C Method and apparatus for identifying a faulted phase |
| 01/07/1993 | WO1993000648A1 Electrical distribution system having mappable control inputs |
| 01/07/1993 | EP0521147A1 Current transformer |
| 01/07/1993 | DE4221876A1 Improved protection circuit for superconducting coils during quenching - uses shunting switch operated by controller reacting to current change in superconducting coil |
| 01/07/1993 | DE4119941A1 Protecting drive motor of electrical power tool - controlling zero voltage releaser and excess current releaser by drive current |
| 01/06/1993 | CN1067768A Micro-consumption electric capacity limiting apparatus |
| 01/05/1993 | US5177658 Heat flow detector for recessed incandescent fixtures |
| 01/05/1993 | US5177657 Ground fault interruptor circuit with electronic latch |
| 01/04/1993 | CA2046134A1 Stray voltage protection device and method thereof |
| 12/30/1992 | CN2126471U Socket-type single-phase electricity-leakage switch |
| 12/30/1992 | CN2126463U Switch with electricity-leakage protection |
| 12/29/1992 | US5175400 Apparatus for controlling elevator door based on power source voltage |
| 12/24/1992 | DE4120478A1 Control circuit for FET with floating source or drain - compares detected FET current with reference signal to control switch across FET gate and source |
| 12/23/1992 | WO1992022949A1 Power fail detection circuit |
| 12/23/1992 | EP0519658A2 Overvoltage sensor with hysteresis |
| 12/23/1992 | CN1019626B Automatic protector of refrigerator |
| 12/23/1992 | CN1019625B Solid-state trip device for protective circuit breaker of three phase mains system, enabling type of fault to be detected |
| 12/22/1992 | US5173833 For breaking a connection in an AC power line |
| 12/22/1992 | US5173831 Neutral line circuit interrupter |
| 12/22/1992 | CA1311829C Phase loss detection circuit including transient protection |
| 12/22/1992 | CA1311828C Positive sequence distance relay for ac power transmission line protection |