| 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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| 09/25/1991 | CN1054877A Low-voltage safety ballast for neon lamp |
| 09/25/1991 | CN1054857A Protection device for distribution line |
| 09/25/1991 | CN1054856A Differential current protection circuits |
| 09/25/1991 | CN1014103B Convenient multi-functional contactor |
| 09/24/1991 | US5051861 Multiple circuit interrupter address identification system |
| 09/18/1991 | EP0446951A2 Four-pole circuit breaker |
| 09/18/1991 | EP0446950A2 Prealarm circuit breaker |
| 09/18/1991 | EP0446933A2 Circuit breaker |
| 09/18/1991 | EP0446724A2 Current limiting method and apparatus |
| 09/18/1991 | EP0446526A2 Differential current protection circuits |
| 09/17/1991 | CA1289227C Method and apparatus for accommodating power disturbances |
| 09/13/1991 | CA2036181A1 Differential current protection circuits |
| 09/11/1991 | EP0446061A2 Abnormal temperature detector for electronic apparatus |
| 09/11/1991 | EP0445905A1 Motor vehicle heated seat control |
| 09/11/1991 | CN2084672U Refrigerator with sound alarm |
| 09/10/1991 | US5047890 Differential current protection circuits |
| 09/10/1991 | US5047889 Electromagnetic switch with undervoltage and phase failure protection |
| 09/10/1991 | US5047724 Power cable arcing fault detection system |
| 09/04/1991 | EP0444622A2 Circuit breaker with detachable tripping tester |
| 09/04/1991 | CN2084243U Lap guard gauge for transformer |
| 09/04/1991 | CN2084242U Moving socket box for quasi-polarity power supper |
| 09/04/1991 | CN2084198U Protector for avoiding fraudulent using electricity and preventing from getting electric shock |
| 09/03/1991 | US5045778 Fault indicator with inrush restraint |
| 08/29/1991 | DE4006163C1 Protecting power electronics equipment - regulating intermediate circuit for constant voltage and operating short-circuiting protector upon overvoltage |
| 08/29/1991 | DE4005813A1 Load current monitor for electronically switched load - compares voltage drop across series measuring resistance with voltage drop across reference resistance |
| 08/29/1991 | DE4004449C1 Load current limiting circuit - has integrated power switch switching off relay if undervoltage appears at input |
| 08/28/1991 | EP0443011A1 Processor controlled circuit breaker trip system having an intelligent rating plug. |
| 08/28/1991 | CN2083753U Multi-function electricity fraudulent using-proof switch |
| 08/22/1991 | WO1991012643A1 Device for motor and short-circuit protection |
| 08/21/1991 | EP0442287A2 A direct current power supply device |
| 08/21/1991 | CN2083382U Automatic opening and closing current limiter of optical-control lights |
| 08/21/1991 | CN2083356U Full-automatic multi-functional electricity stealing preventer |
| 08/21/1991 | CN2083355U Power limiter limiting on times |
| 08/20/1991 | US5041940 Power transistor control circuit particularly for switching incandescent lamps |
| 08/20/1991 | US5041737 Circuit breaker |
| 08/20/1991 | CA2010491A1 Microprocessor-controlled circuit breaker and system |
| 08/20/1991 | CA1287884C High impedance fault analyzer in electric power |
| 08/20/1991 | CA1287867C Bus differential relay |
| 08/14/1991 | EP0441734A2 Line protection circuit for an integrated services digital network |
| 08/14/1991 | EP0441472A2 Circuit breaker with rating plug having memory |
| 08/14/1991 | EP0440835A1 Differential current circuit breaker with transducer with device for balancing pulse signals |
| 08/14/1991 | DE4102728A1 Switch appts. combination for electronic appts. - has main switch appts. with electronic information processing stage and load circuit switches |
| 08/14/1991 | CN2082868U Double-channel differential voltage monitoring instrument |
| 08/14/1991 | CN2082866U Kilowatt-hour meter for rationing power supply |
| 08/13/1991 | US5039842 Mold heater moisture detection and dry out apparatus |
| 08/13/1991 | CA2036032A1 Electrical circuit breaker protection device |
| 08/08/1991 | WO1991011732A1 Method and device for radio-navigational determinations using artificial earth-satellites |
| 08/07/1991 | CN2082503U Safe equipment of short circuit of miner's lamp |
| 08/07/1991 | CN2082480U Phase order controlled instrument |
| 08/07/1991 | CN2082479U Overvoltage safety for the use of guard against theft |
| 08/07/1991 | CN2082478U Energy saving and protection device of digital controlled refrigerator |
| 08/07/1991 | CN1053716A Circuit breaker with rating plug having memory |
| 08/06/1991 | US5038246 Fault powered, processor controlled circuit breaker trip system having reliable tripping operation |
| 08/06/1991 | CA1287393C Self-monitoring digital solid-state trip release |
| 08/06/1991 | CA1287392C Solid-state trip unit of an electrical circuit breaker with contact wear indicator |
| 08/06/1991 | CA1287369C Fault current diverter |
| 08/01/1991 | DE4003216A1 Pulse recognition circuit for thyristor emergency ignition arrangement - derives usable firing signal from protracted discharge of capacitor through input impedance of Schmitt trigger circuit |
| 07/31/1991 | CN2082042U Multifunction a.c. contactor |
| 07/31/1991 | CN2082041U Trip circuit unit with three potential positions for low-voltage protected electrical appliances |
| 07/31/1991 | CN2082034U Safety power plug |
| 07/31/1991 | CN2081956U All-function protector for refrigerator |
| 07/30/1991 | CA2034380A1 Protection circuit for multiple phase power system |
| 07/30/1991 | CA1287159C Range limitation for a protection device in a power supply network |
| 07/30/1991 | CA1287110C Symmetrical fault current detector |
| 07/25/1991 | WO1991011049A1 Protective circuit for an electrical consumer |
| 07/25/1991 | WO1991011048A1 Digital differential relay system |
| 07/24/1991 | EP0437657A1 Protection device for an electric machine |
| 07/23/1991 | US5034622 Power supply interface apparatus for communication facilities at a power station |
| 07/18/1991 | DE4001094A1 Wide band cable TV system - has switch, impedance and evaluating circuit open circuiting sec. side of transformer upon power flow reversal |
| 07/18/1991 | DE4000820A1 Schutzschaltung fuer einen elektrischen verbraucher Protection circuit for an electrical load |
| 07/17/1991 | EP0336943A4 Phase loss detection circuit including transient protection |
| 07/17/1991 | CN1053149A Open-phase protector of three-phase ac power source |
| 07/17/1991 | CN1053129A Grounding current detection method and device thereof |
| 07/10/1991 | CN2080675U Safety overload warning device for circuit |
| 07/10/1991 | CA2030114A1 Multiple circuit interrupter address identification system |
| 07/03/1991 | EP0435371A2 Power supply device with non-symmetric monitoring |
| 07/03/1991 | CN2080291U Electronic ballast with overcurrent protective function |
| 07/03/1991 | CN2080266U Power saving protector of refrigerator |
| 07/03/1991 | CN2080253U Carrier wave electric shock protective and anti-stealing electricity device |
| 07/03/1991 | CN2080252U Resonant electric shock safety device |
| 07/02/1991 | US5029269 Delayed power supply overvoltage shutdown apparatus |
| 07/02/1991 | US5029039 Current adaptive fault indicator |
| 07/02/1991 | US5029037 Safe mains voltage supply outlet and method |
| 07/02/1991 | CA1285644C Directional detection in connection with faults in a power supply network |
| 06/26/1991 | CN2079821U Auto-protecting switch for loss of phase |
| 06/26/1991 | CN2079820U Ac overcurrent controller |
| 06/25/1991 | CA1285313C Electric motor load sensing system |
| 06/20/1991 | DE3941975A1 Monitoring circuitry for isolation resistances - has single pole measurement arrangement contg. bridge circuit for unearthed AC networks including supplied circuits |
| 06/19/1991 | CN2079376U Automatic time-delay electricity cutting off protector for remote colour tv set |
| 06/19/1991 | CN2079375U Mineral explosion-insulated vacuum electric feedback switch |
| 06/19/1991 | CN2079374U Mineral lamp short circuit protective circuit device |
| 06/19/1991 | CN2079364U Multi-function protective socket |
| 06/19/1991 | CN2079298U Electricity fraudulent use preventing device |
| 06/19/1991 | CN1052398A Electrical energy storage system |
| 06/12/1991 | EP0432054A2 Electronic circuit breaker of which the front panel is constituted as a flat panel display |
| 06/12/1991 | EP0431812A2 Luminous tube protection circuit |
| 06/12/1991 | CN2078941U Multi-functional mean for preventing the theft of electricity |
| 06/12/1991 | CN2078940U Power-economizing general protector using integrated circuit |
| 06/12/1991 | CN2078939U Solid-state relay without power supply |
| 06/12/1991 | CN2078938U Overload protector for preventing the theft of electricity |