| 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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| 03/22/1989 | EP0307842A2 Trip control apparatus of circuit breaker |
| 03/22/1989 | EP0307826A1 Protection device for high resistance ground faults |
| 03/22/1989 | CN2034749U Automatic protector for refrigerator |
| 03/22/1989 | CN2034746U Protector for refrigerator |
| 03/22/1989 | CN2034745U Current-limiting leakage protector |
| 03/22/1989 | CN2034744U Automatic resetting multifunctional electricity-saving protector |
| 03/21/1989 | US4814935 Circuit breaker reactive to three time-overcurrent characteristics |
| 03/21/1989 | US4814934 Voltage fault detector |
| 03/21/1989 | US4814712 Test kit for a circuit breaker containing an electronic trip unit |
| 03/21/1989 | US4814641 Electric safety supply apparatus and connector device combination |
| 03/21/1989 | CA1251501A1 Protector with circuit disabler |
| 03/15/1989 | EP0307383A1 Process for controlling electrical power, and system for carrying out this process |
| 03/15/1989 | CN2034343U Automatic electronic type error peak clipper |
| 03/15/1989 | CN2034340U Explosion isolation type protector for monitoring high voltage leakage |
| 03/15/1989 | CN2034339U Protector for preventing of electricity stealing and overvoltage leakage |
| 03/15/1989 | CN2034338U Tv automatic protector for lightning stroke prevention |
| 03/15/1989 | CN2034337U Three phase electric shock protector for electric machine |
| 03/15/1989 | CN2034336U Multifunctional circuit protector |
| 03/15/1989 | CN2034335U Multifunctional domestic saveguard against electricity |
| 03/14/1989 | US4812995 Digital distance relaying on electric power transmission |
| 03/14/1989 | US4812943 Current fault protection system |
| 03/08/1989 | EP0305936A2 Mos ic reverse battery protection |
| 03/08/1989 | EP0305856A2 Process to register a current flowing through the human body between a phase and a neutral conductor, and circuitry for carrying out the process |
| 03/08/1989 | CN2033953U Auto-resetting type shockproof protector with electricity limiting function |
| 03/08/1989 | CN2033952U Electronic safety device against over-voltage and over-current of distributing systems |
| 03/08/1989 | CN2033951U Leaking electricity protector for domestic electrical appliance |
| 03/07/1989 | US4811154 Apparatus for rapid recognition of short-circuits |
| 03/07/1989 | US4811153 Circuit protector |
| 03/07/1989 | US4811136 Phase controller for processing current and voltage faults |
| 03/07/1989 | US4810936 Failing lamp monitoring and deactivating circuit |
| 03/07/1989 | CA1250941A1 Programmed overexcitation protective relay and method of operating the same |
| 03/01/1989 | EP0304456A1 Overcurrent protection device for power generating plants for residential and industrial buildings and similar buildings |
| 02/28/1989 | US4809125 Circuit interrupter apparatus with a style saving rating plug |
| 02/28/1989 | US4809122 Self-protective fuel pump driver circuit |
| 02/28/1989 | US4808905 Current-limiting circuit |
| 02/22/1989 | CN2033163U Manual or automatic resetting multi-functional electricity-getting protecter |
| 02/22/1989 | CN2033162U Limited unit for electric power |
| 02/22/1989 | CN2033161U Multi-functional electricity-saving safe unit |
| 02/15/1989 | CN2032773U Automatic power limiter |
| 02/09/1989 | WO1989001255A1 Self-protective fuel pump driver circuit |
| 02/09/1989 | WO1989001254A1 I2t MONITORING CIRCUIT |
| 02/09/1989 | DE3725390A1 Switching protection device |
| 02/08/1989 | EP0302470A2 Circuit breaker including selectively operable long-time-delay tripping circuit |
| 02/08/1989 | CN2032370U Protection socket for refrigerator |
| 02/07/1989 | US4803635 Information data output device for electric-power systems |
| 02/07/1989 | US4803434 Test device for circuit breakers having electronic trip units |
| 02/01/1989 | CN2031971U Safety automatic controller for electricity-consuming appliances |
| 02/01/1989 | CN1030732A Safety devices for elevator |
| 01/31/1989 | US4802053 Control circuitry including phase failure relay |
| 01/26/1989 | DE3723568A1 Residual current device (differential current protection circuit breaker) |
| 01/25/1989 | EP0300885A1 Integrated circuit memory including an anti-fraud device |
| 01/25/1989 | EP0300078A1 Overcurrent detector and circuit breaker |
| 01/25/1989 | EP0300077A1 Overcurrent detector |
| 01/25/1989 | EP0300076A1 Circuit breaker |
| 01/25/1989 | CN2031585U Simple domestic leakage safety device without electric consumption |
| 01/25/1989 | CN2031584U Highly sensitivity electromagnetic safety device for electric shock |
| 01/25/1989 | CN2031583U Ic auto-protector for refrigerator |
| 01/25/1989 | CN2031578U Anticreeping safety socket |
| 01/25/1989 | CN1030672A Single-phase electric distribution equipment coming into room of user |
| 01/24/1989 | US4800509 Detection of high resistance faults in electrical power supply network |
| 01/24/1989 | CA1249337A1 Line protection |
| 01/18/1989 | EP0299060A1 High impedance fault analyzer in electric power distribution. |
| 01/18/1989 | CN2031172U Over-voltage protector |
| 01/18/1989 | CN2031171U Digital protective relay for xbj series high voltage power distribution line |
| 01/18/1989 | CN1030501A Three-phase phase-sequence identification controller with loss-of-phase and overload protection |
| 01/17/1989 | US4799130 Use with electrical equipment |
| 01/17/1989 | US4799126 Overload protection for D.C. circuits |
| 01/11/1989 | EP0298445A2 Circuit breaker |
| 01/11/1989 | EP0298092A1 Circuit breaker trip solenoid assembly. |
| 01/11/1989 | CN2030773U Overhead power line wire-breakage automatic controller |
| 01/10/1989 | US4797775 Symmetrical fault current detector |
| 01/05/1989 | DE3719956A1 Device and method for blocking detection |
| 01/04/1989 | EP0298018A1 Excess current releasing device with accelerated release |
| 01/04/1989 | EP0297418A1 Method for operating a frequency relay and frequency relay for carrying out the method |
| 01/04/1989 | CN2030388U Automatic protection device for refrigerator and other electric equipments |
| 01/04/1989 | CN2030387U Automatic protector for 220v single-phase source |
| 01/04/1989 | CN2030386U 三相负荷限制器 Three-phase load limiters |
| 01/04/1989 | CN1030169A Protection arrangement for telephone subscriber line interface circuit |
| 01/03/1989 | US4796283 Surge counter for an overvoltage arrester |
| 01/03/1989 | US4796148 Current-sensing arrangement utilizing two current-sensing signals |
| 01/03/1989 | US4796147 Method for detecting voltage losses in a low voltage distribution system |
| 01/03/1989 | US4796144 For an AC circuit |
| 01/03/1989 | US4795983 Method and apparatus for identifying a faulted phase |
| 01/03/1989 | US4795980 Device for monitoring short circuits and overloads in electronic proximity switches |
| 01/03/1989 | US4795877 Fault detecting device for welded pipe joints |
| 01/03/1989 | CA1248179A1 Protected input/output circuitry for a programmable controller |
| 12/29/1988 | WO1988010528A1 Shorted-coaxial-cable detector for local-area networks |
| 12/28/1988 | EP0296150A1 Apparatus for switching a domestic electric network on and off |
| 12/28/1988 | CN88211605U Plug-in protector for distributing frame of telephone main |
| 12/28/1988 | CN86201119U Selectable electric leakage protector for mine low voltage net |
| 12/28/1988 | CN86200462U Auto electronic protector |
| 12/28/1988 | CA1247728A Programmed overcurrent protection control apparatus and method of operating the same |
| 12/27/1988 | US4794484 Circuit interrupter apparatus with a style saving override circuit |
| 12/27/1988 | US4793345 High voltage protection circuit for ultrasonic cataract remover |
| 12/21/1988 | EP0295800A2 Circuit testing |
| 12/21/1988 | EP0295415A2 Circuit for protection against fault currents |
| 12/21/1988 | EP0295342A1 Power source device for circuit breaker |
| 12/21/1988 | CN88211238U Multifunction protection unit for household electric appliances |
| 12/21/1988 | CN88210948U Automatic power saving protection unit |
| 12/21/1988 | CN88210784U Protection switch for phase interruption, fixed-quantity and electric leakage |