| 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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| 06/13/1990 | EP0372256A2 Method for the projection of a transformer and device for carrying out the method |
| 06/13/1990 | CN2058282U Power saving multi-function electric circuit protector |
| 06/13/1990 | CN2058281U Multi-function electronic security device |
| 06/13/1990 | CN2058280U Power saving multi-purpose switch |
| 06/13/1990 | CN2058279U Overvoltage protector for domestic electrical appliances |
| 06/13/1990 | CN1043044A Automatic timekeeping controller for power overcurrent |
| 06/12/1990 | US4933803 Three phase loss protection circuit |
| 06/12/1990 | US4933801 Ground fault circuit interrupter |
| 06/06/1990 | CN2058046U Non-contact cut-off type telephone general wiring frame plug-in protector |
| 06/05/1990 | US4931896 Distribution line switchgear control with isolated cascaded power supplies |
| 06/05/1990 | US4931894 Ground fault current interrupter circuit with arcing protection |
| 06/05/1990 | US4931893 Loss of neutral or ground protection circuit |
| 06/05/1990 | US4931791 Shorted-coaxial-cable detector for local-area networks |
| 06/05/1990 | US4931778 Circuitry for indicating the presence of an overload or short circuit in solid state relay circuits |
| 05/30/1990 | EP0370139A1 Circuit breaker with overcurrent protection |
| 05/30/1990 | CN2057787U Multi-functional protective device |
| 05/30/1990 | CN2057786U Fully-automatic repeating switch type protective device for electric shock |
| 05/30/1990 | CN2057785U Automatic control device of domestic power supply |
| 05/30/1990 | CN2057784U Multi-functional domestic electric meter box |
| 05/29/1990 | US4930038 Current overload tripping device with leading tripping action |
| 05/29/1990 | US4929901 DC ground fault detection |
| 05/29/1990 | US4929875 Method to control stops of an intermittently operating driving motor |
| 05/23/1990 | EP0369782A2 Drive circuit for operating an appliance such as a printer |
| 05/23/1990 | EP0369577A2 Apparatus for providing distance protection and distance measurement for a high voltage transmission line |
| 05/23/1990 | CN2057538U Electric leakage eliminator |
| 05/23/1990 | CN2057537U Multifunction autocontroller |
| 05/22/1990 | CA1269415A1 Distance relay supervision system |
| 05/16/1990 | EP0368030A1 Measuring method and circuitry for the determination of the trip current of residual current breakers |
| 05/16/1990 | CN2057280U Metering and switching controller for over quota electricity-consuming |
| 05/16/1990 | CN1042277A Selective protecting method for high-voltage leakage of electricity |
| 05/16/1990 | CN1008035B Safety circuit for electrical appliance's outer casing with electricity |
| 05/15/1990 | US4926288 Over-current protection circuit |
| 05/15/1990 | US4926281 Fail-safe and fault-tolerant alternating current output circuit |
| 05/15/1990 | US4926280 Capacitor protection circuit for protecting storage capacitors in an electronic power supply |
| 05/15/1990 | CA1269165A1 Direct transfer trip apparatus for use with an active pilot wire communications channel |
| 05/09/1990 | EP0367690A1 Tripping circuit with test circuit and selfprotected remote control for opening |
| 05/09/1990 | EP0367563A2 Detector of quantity of electricity |
| 05/09/1990 | CN2057042U Protector for using electricity |
| 05/09/1990 | CN2057041U Over-voltage under-voltage and over-current protector for full-automatic refrigerator |
| 05/09/1990 | CN2057040U Over-voltage protector for household electric appliances |
| 05/09/1990 | CN2057038U Multifuncitonal protector for limiting consumption of electricity, over-current, leakage and avoiding or indicating fraudulent use of electricity |
| 05/03/1990 | WO1990004869A1 Transient suppressor |
| 05/02/1990 | CN1007857B Synthetic power-frequency variable-quantity directional-relay |
| 05/01/1990 | US4922372 Solid state overcurrent protection system for circuit breakers |
| 05/01/1990 | US4922370 Automatically resetting circuit protector |
| 05/01/1990 | US4922369 Circuit protector |
| 05/01/1990 | US4922155 Protective circuit for reduced voltage lamps |
| 04/25/1990 | CN2056547U Automotive detecting and breaker device for high-power electric appliance |
| 04/25/1990 | CN1007770B Circuit arrangement for protecting electronic device to counteract excessive load |
| 04/18/1990 | EP0363746A1 Overcurrent protection device for electrical networks and apparatuses |
| 04/18/1990 | EP0363446A1 Apparatus for detecting malfunctions of an electrical device |
| 04/18/1990 | CN2056288U Current-type leakage protector controlled by microcomputer |
| 04/18/1990 | CN2056287U Supersensitive capacitor phase-lack protector |
| 04/18/1990 | CN2056286U Multifunctional full automatic protector for refrigerator |
| 04/18/1990 | CN1041489A Safety protector for household electric appliances |
| 04/17/1990 | US4918564 Load driver with delayed turn-off |
| 04/17/1990 | US4918562 Power controller with voltage-controlled circuit breaker |
| 04/17/1990 | CA1267966A1 Active pilot wire apparatus for electromechanical current differential relays |
| 04/11/1990 | EP0362406A1 System for detecting defective point on power transmission line by utilizing satellite |
| 04/11/1990 | EP0221185B1 Electronic overcurrent relay |
| 04/11/1990 | CN2055997U Outside electricity generating equipment for energy saving of drilling machine |
| 04/11/1990 | CN2055995U Electrical appliance time delay protection system with selectable capacity |
| 04/11/1990 | CN2055994U Multiloop refrigerator protection device with adjustable protection point |
| 04/11/1990 | CN2055938U Electricity rationing controller for kilowatt-hour meter |
| 04/11/1990 | CN1007568B Ground fault receptacle with compact component arrangement |
| 04/10/1990 | US4916573 Control circuit for a circuit interrupter |
| 04/04/1990 | CN2055648U Multifunction civil use electricity nonitor |
| 04/04/1990 | CN2055647U Leakage protective device |
| 04/03/1990 | US4914542 Current limited remote power controller |
| 04/03/1990 | US4914541 Solid-state trip device comprising an instantaneous tripping circuit independent from the supply voltage |
| 03/28/1990 | EP0360109A1 Electrode line protective device |
| 03/28/1990 | CN2055304U Multifunctional protective switch |
| 03/28/1990 | CN2055303U Combined protector for domestic electric appliance |
| 03/28/1990 | CN2055302U Medical two-direction micro current excess-current protector |
| 03/28/1990 | CN2055301U Automatic overload protective arrangement |
| 03/28/1990 | CN1007392B Bus differential relay |
| 03/27/1990 | US4912774 Instantaneous voltage drop detector |
| 03/27/1990 | US4912591 Distribution line switchgear control employing a precision rectifier |
| 03/27/1990 | US4912588 High-tension voltage generator and method of protecting same against electrical arcs |
| 03/21/1990 | CN2054953U Safety a c mains |
| 03/21/1990 | CN2054949U Automatic control for rationing feeding electricity when in high-peak consumption |
| 03/21/1990 | CN2054948U Protecting device for leakage of electricity |
| 03/21/1990 | CN1040716A Circuit and method for dc content protection of parallel vscf power systems |
| 03/21/1990 | CN1007308B Direct transeer trip apparatus for use with an active pilot wire communications channel |
| 03/21/1990 | CN1007307B Active pilot were apparatus for electromecanical current differential relays |
| 03/21/1990 | CN1007306B Solid-state trip device with test circuit for an electrical circuit breaker |
| 03/20/1990 | US4910631 Circuit breaker with over-temperature protection and low error I2 t calculator |
| 03/20/1990 | CA1266882A1 Protection technique for an exposed conductor |
| 03/14/1990 | EP0357707A1 Current fault protection system |
| 03/14/1990 | CN2054582U Automatic voltage regulating unit for refrigerator |
| 03/14/1990 | CN2054581U Automatic batcher for using electricity |
| 03/14/1990 | CN2054580U Self-lock electricity limiter |
| 03/07/1990 | EP0357448A2 Electrical power supplies |
| 03/07/1990 | EP0357392A2 Circuit and method for DC content protection of parallel VSCF power systems |
| 03/07/1990 | CN2054223U Electric power quantitative protector without power consumption |
| 03/07/1990 | CN1007107B Electronic protecting instrument for ac load |
| 02/28/1990 | EP0356344A2 Differential protection device |
| 02/28/1990 | CN2053821U Remote-controlled automatic current cut-out |
| 02/28/1990 | CN2053809U Voltage and current type regulated power supply |
| 02/28/1990 | CN2053808U Computerized monitor for refrigerator |