| 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) |
|---|
| 06/12/1991 | CN1052224A Automatic protector of refrigerator |
| 06/11/1991 | US5023537 Polyphase brushless machine |
| 06/06/1991 | DE3939408A1 Working voltage monitor for selector banks in telephone exchange - assigns comparator to each voltage with outputs switched together for unit able to produce alarm signal |
| 06/05/1991 | EP0430363A2 A thin-film transistor circuit |
| 06/05/1991 | CN2078499U Protective electricity-saving device for refrigerator |
| 06/04/1991 | US5021722 Composable protection and control apparatus for motors |
| 05/30/1991 | WO1991007795A1 Faulted current indicator with protection against temporary overloads and transients |
| 05/29/1991 | CN2078053U Electrical leakage protecting device |
| 05/29/1991 | CN2078052U Relay of pinpoint accuracy dc. over voltage and under-rooll |
| 05/28/1991 | US5019956 Power control apparatus |
| 05/28/1991 | US5019936 Voltage-to-frequency squared circuit |
| 05/28/1991 | US5019935 Protection circuit for electrical appliance |
| 05/23/1991 | DE3938154A1 Current transformer saturation recognition - by spatial vector tracking of sec. current when opposing components of fundamental oscillation are blocked for prodn. of difference criteria |
| 05/22/1991 | CN2077614U Integrated time-controlled amplitude-discriminating protector for preventing electric shock |
| 05/22/1991 | CN2077613U Control circuit for protecting compressor of domestic refrigerator |
| 05/22/1991 | CN2077612U Over-voltage, undervoltage and instantaneous interruption protector for domestic electrical appliances |
| 05/22/1991 | CN2077611U Electric protector |
| 05/22/1991 | CN2077610U Leakage protector |
| 05/22/1991 | CN2077609U Protector for refrigerator (380v) and refrigerating installations |
| 05/22/1991 | CN2077608U Intelligent controller for electrical consumption |
| 05/22/1991 | CN2077607U Electricity-limiting protector |
| 05/22/1991 | CN2077600U Multifunction safety receptacle |
| 05/21/1991 | US5018042 Reducing differential potentials |
| 05/21/1991 | US5017846 Stall protection circuit for an electronically commutated motor |
| 05/17/1991 | CA2029740A1 Electronic trip device whose front panel is formed by a flat screen display |
| 05/16/1991 | WO1991006998A1 Circuit breaker warning relay and control accessory |
| 05/15/1991 | CN2077167U Overcurrent protection device |
| 05/15/1991 | CN2077129U Multi-functional electricity-using monitor |
| 05/15/1991 | CA2030740A1 Non-fragmenting arrester with staged pressure relief mechanism |
| 05/14/1991 | US5016135 Power supply incorporating circuit breaker and fault detection circuit |
| 05/14/1991 | CA1284199C Immersion cooling safety monitoring system |
| 05/08/1991 | EP0426103A2 Electronic circuit device for protecting electronic circuits from unwanted removal of ground terminal |
| 05/08/1991 | EP0204723B1 Auto-reset circuit breaker |
| 05/08/1991 | CN2076722U Current type multi-controller |
| 05/08/1991 | CN2076721U Neutral-point drift overvoltage protector |
| 05/08/1991 | CN2076709U Mechanical lock catch contactor of iron core direct acting type |
| 05/08/1991 | CN1051274A Combined protection system for remote illumination signs in coal mine |
| 05/07/1991 | US5014043 Current sensing |
| 05/02/1991 | EP0425169A2 Electrical energy storage system |
| 05/02/1991 | EP0425035A2 Overload protection drive circuit for a power transistor |
| 05/02/1991 | DE4009094A1 Time-delayed fault current isolator with electronic switch - incorporates thyristor for delayed shorting of output from DC supply circuit to polarised holding magnet trip |
| 05/01/1991 | CN2076277U Multifunction safety switch |
| 04/30/1991 | US5012168 Method and apparatus for detecting stall current in an energized electric motor |
| 04/28/1991 | CA2028388A1 Electrical energy storage system |
| 04/25/1991 | DE4030413A1 Short-circuit current limiter - with capacitor parallel to superconductor and rapid switch in tandem |
| 04/24/1991 | EP0423885A1 Current supply with inrush current limitation |
| 04/24/1991 | EP0423226A1 Conversion circuit for limiting inrush current |
| 04/24/1991 | CN2075833U Multifunctional current controlling safety device |
| 04/24/1991 | CN2075784U Anti-electricity steeling multifunctional electric meter box |
| 04/23/1991 | CA1283474C Static trip circuit breaker with automatic circuit trimming |
| 04/23/1991 | CA1283446C Circuit breaker test kit |
| 04/21/1991 | CA2027931A1 Instrinsically safe barrier device |
| 04/20/1991 | CA2028028A1 Intrinsically safe system |
| 04/18/1991 | WO1991005393A1 Device for protecting a fluorescent tube installation |
| 04/17/1991 | CN2075392U Switch with auto-off when power cut |
| 04/17/1991 | CN2075391U Protector with automatic reconnection for leakage of electricity |
| 04/16/1991 | US5008651 Battery-powered fault indicator |
| 04/16/1991 | CA1283161C Transformer protection system |
| 04/11/1991 | DE4030475A1 Electric motor control affording warning of impending overheat - comparing predetermined critical temp. entry with on-off control signal count correlated with obtd. thermodynamic characteristics |
| 04/11/1991 | DE3933118A1 Overcurrent protection circuit for variety of electronic subassemblies - ensures continuing isolation of defective circuit by rupture of fuse on deviation from normal current consumption |
| 04/10/1991 | EP0421892A1 Circuit breaker with an electronic release |
| 04/10/1991 | EP0421204A2 An overcurrent protection apparatus |
| 04/09/1991 | US5006949 Temperature compensated overload trip level solid state relay |
| 04/05/1991 | CA2000227A1 Procedure and device for overload and short-circuit protection of output drivers |
| 04/03/1991 | EP0419943A2 Power control unit |
| 04/03/1991 | CN2074508U Three-phase four wire protector for preventing the theft of electricity |
| 04/02/1991 | US5004528 Method and apparatus for electro chemical machining |
| 04/02/1991 | CA1282461C Method and apparatus for detection of ac power failure conditions |
| 03/30/1991 | CA2024683A1 Electrical power system with remote monitoring and control of protective relays |
| 03/27/1991 | CN2074085U Safety energy-saving electronic ballast for fluorescent lamp |
| 03/27/1991 | CN2074065U Three-phase a.c. open phase protective relay |
| 03/27/1991 | CN2074064U Adjustable automatic current limiter |
| 03/26/1991 | US5003486 Programmable safety electrical socket controller |
| 03/26/1991 | US5003426 Faulted current indicators and inrush restraints therefor |
| 03/26/1991 | CA1282114C Noise tolerant fast acting optical overcurrent protector and method |
| 03/21/1991 | WO1991003829A1 Trip delay override for electrical circuit breakers |
| 03/21/1991 | DE3934421C1 Protective circuit for circuitry with light indicator in motor vehicle - has transistor breaking current flow in dependence on information voltage from resistor measuring current |
| 03/20/1991 | EP0417873A1 Circuit for controlling a current supply device for low tension |
| 03/20/1991 | EP0417719A1 Anti-electric shock safety system, for electric machinery and installations |
| 03/20/1991 | EP0314683A4 Circuit protector |
| 03/20/1991 | CN2073618U Protective switch for the use of leakage and short of single phase |
| 03/20/1991 | CN1012056B Safety device for ac elevator |
| 03/19/1991 | US5001593 Circuit configuration for temperature monitoring of power switching transistors integrated in a semiconductor circuit |
| 03/19/1991 | CA1281806C Solid-state instantaneous trip device for a current limiting circuit breaker |
| 03/14/1991 | CA2024644A1 Circuit breaker comprising an electronic trip device |
| 03/13/1991 | EP0416716A2 Water sensing type power breaker circuit |
| 03/13/1991 | EP0416569A2 Method and apparatus for line power monitoring for uninterruptible power supplies |
| 03/13/1991 | EP0416422A1 Differential current circuit-breaker |
| 03/13/1991 | CN2073183U Low voltage electrified wire netting selective electricity leakage protector used in mine |
| 03/13/1991 | CN2073182U Multifunction protector for electricity consumption |
| 03/13/1991 | CN2073181U Protective controller for electricity consumption |
| 03/13/1991 | CN2073180U Phase loss protective contactor |
| 03/13/1991 | CN2073179U Multifunction protector for tv and refrigerator |
| 03/12/1991 | US4999730 Line voltage monitor and controller |
| 03/12/1991 | US4999728 Protecting electronic equipment |
| 03/12/1991 | CA1281407C Directional comparison blocking system |
| 03/12/1991 | CA1281376C Fast acting overcurrent protector and method |
| 03/07/1991 | DE3928801A1 Contact breaker protection of low voltage halogen lamps - having monitored current compared with threshold valve to control supply to lamp |
| 03/06/1991 | EP0415866A2 Power supply for a display device provided with shutdown means |
| 03/06/1991 | EP0415179A2 Differential protective relay apparatus |