| 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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| 04/14/1992 | US5105324 Device for protecting semiconductor circuits against transients on the supply line |
| 04/14/1992 | US5105182 Direct current power supply device having an alarm provided for power failure under varying load conditions |
| 04/13/1992 | WO1992007403A1 Overcurrent protection device |
| 04/13/1992 | WO1992007402A1 Circuit protection arrangement |
| 04/13/1992 | CA2092999A1 Overcurrent protection device |
| 04/13/1992 | CA2092902A1 Circuit protection arrangement |
| 04/08/1992 | EP0478574A1 Method and apparatus for monitoring an ac transmission line |
| 04/07/1992 | USRE33874 Electric motor load sensing system |
| 04/07/1992 | US5103365 Downed conductor automatic detecting device |
| 04/07/1992 | CA1298649C Electronic overcurrent tripping device |
| 04/02/1992 | WO1992005610A1 Power supply for generating an output voltage mainly of sinusoidal shape |
| 04/01/1992 | EP0477959A2 Overload current protection apparatus |
| 04/01/1992 | EP0477371A1 Digital differential relay system |
| 04/01/1992 | CN2100705U Auto-control reactive power compensation and relay protection |
| 04/01/1992 | CN2100628U False wiring protective device for watt-hour meters |
| 03/31/1992 | US5101316 Microprocessor-based trip device with optional functions and selection process of said functions |
| 03/31/1992 | CA1298351C Ampere second relay |
| 03/25/1992 | CN2100050U Lighting comprehensive protective device of electric drill for coal mine |
| 03/25/1992 | CN2100039U Safety socket |
| 03/19/1992 | WO1992004756A1 Current relay circuit |
| 03/18/1992 | CN2099428U Electronic ballast of fluorescent lamp |
| 03/18/1992 | CN2099403U Automatic switch device of 380 v. power source of three-phase |
| 03/18/1992 | CN1059623A Method of and device for protecting electrical power system |
| 03/17/1992 | US5097380 Sectionalizer control |
| 03/17/1992 | US5097379 Automatic or manual circuit restoration apparatus after a prescribed time delay |
| 03/12/1992 | WO1992004635A1 Process for finding the short-circuit impedance of an electric power supply system to be monitored |
| 03/12/1992 | DE4029141A1 Verfahren zum ermitteln der kurzschlussimpedanz einer zu ueberwachenden elektrischen energieversorgungsanlage A method for determine the short-circuit impedance to a monitored by electrical energy supply system |
| 03/12/1992 | CA2091345A1 Method of determining the short-circuit impedance of an electrical power supply system to be monitored |
| 03/11/1992 | EP0474565A1 Electronic trip-device with short-delay function |
| 03/11/1992 | EP0474186A2 Method of and device for protecting electrical power system |
| 03/11/1992 | CN2098783U Electronic ballast with starting protection in absence of lamp |
| 03/11/1992 | CN2098761U Multifunctional switch for turning antenna of tv |
| 03/11/1992 | CN2098748U Auto-breaker for household audio and video tape recorders |
| 03/11/1992 | CN1059429A Overcurrent trip circuit |
| 03/10/1992 | US5095399 Differential protective relay apparatus |
| 03/10/1992 | US5095398 Multi pole |
| 03/05/1992 | WO1992003867A1 Surge suppressor device |
| 03/05/1992 | WO1992003866A1 Solid state circuit interrupter and circuit breaker |
| 03/04/1992 | EP0473428A2 Overcurrent trip circuit |
| 03/04/1992 | EP0473271A2 Data processing apparatus and power supply therefor |
| 03/04/1992 | EP0472797A1 Overload protection circuit |
| 03/04/1992 | CN2098107U Automatic monitor unit for using electricity |
| 03/03/1992 | US5093770 Electrical energy storage system |
| 03/01/1992 | CA2049120A1 Overcurrent trip circuit |
| 02/26/1992 | CN2097460U Impedance relay with low-transient measuring error |
| 02/26/1992 | CN2097459U Protector for miner's lamp |
| 02/26/1992 | CN1059051A Protective circuit and protective plug fir telecommunication installations |
| 02/25/1992 | US5091816 Procedure and device for overload and short-circuit protection of output drivers |
| 02/19/1992 | EP0471167A1 Protective circuit and protective module for telecommunication devices |
| 02/19/1992 | CN2096855U Fire alarm heater blanket |
| 02/19/1992 | CN2096832U Loop protecting plug-in block for power pollution |
| 02/19/1992 | CN2096829U Anti-theft electric protector |
| 02/19/1992 | CN2096828U Scr power supply ration instrument |
| 02/19/1992 | CN2096827U Comprehensive protector for power supply of residence |
| 02/18/1992 | US5089928 Processor controlled circuit breaker trip system having reliable status display |
| 02/18/1992 | US5089927 Power feed circuit for digital communications terminal equipment |
| 02/18/1992 | CA1296059C Device for detecting openings and shorts in at least one leg of an electrical circuit |
| 02/12/1992 | CN2096180U Safety protector for electric blanket |
| 02/12/1992 | CN2096143U Multifunctional anti-electricity stealing protector |
| 02/12/1992 | CN1058674A Special control switch for electric consumption in guesthouse and inn |
| 02/11/1992 | US5087999 Capacitor bank provided with a protective device |
| 02/11/1992 | US5087871 Power supply with inrush current limiter |
| 02/11/1992 | US5087870 Constant power circuit |
| 02/06/1992 | WO1992002066A1 Process control instrument with loop overcurrent circuit |
| 02/05/1992 | EP0470043A2 Electrical circuit arrangement |
| 02/05/1992 | EP0469207A2 Solid state overload relay |
| 02/05/1992 | CN1058489A Selective high-voltage leakage protection using dynamic voltage comparison |
| 02/04/1992 | US5086367 Circuit breaker |
| 02/04/1992 | US5086366 Prealarm circuit breaker |
| 02/02/1992 | CA2047658A1 Electronic trip device with short delay function |
| 01/29/1992 | EP0468830A2 Safety box for high-voltage-operated sign |
| 01/29/1992 | EP0468361A1 Limitation of closing force at the closing edge of a movable element |
| 01/29/1992 | EP0468299A2 Circuit arrangement with a transformer |
| 01/29/1992 | CN1058303A Special protctive circuit for leakage of electric appliance casing |
| 01/29/1992 | CN1058302A Safety coltage regulator |
| 01/29/1992 | CN1058301A 可编程序的反时限延迟电路 Inverse programmable delay circuit |
| 01/28/1992 | US5083634 Safety device for elevator |
| 01/22/1992 | EP0467675A2 Programmable inverse time delay circuit |
| 01/22/1992 | CN2094174U Electronic ballast with overload protector |
| 01/22/1992 | CN2094139U Multi-functional circuit protector |
| 01/22/1992 | CN2094138U Power-economizing protective switch of electrical equipment |
| 01/22/1992 | CN2094137U Shockproof protector for household circuit |
| 01/22/1992 | CN2094136U Polarity-adaptive switch for dc power supply |
| 01/22/1992 | CN2094135U Power-economizing protector of the refrigerator |
| 01/22/1992 | CN2094079U Safety multi-purpose controller |
| 01/22/1992 | CN2093580U Multi-functional electronic-controlling electric frying-pan made of cast-iron |
| 01/21/1992 | US5083114 Ground fault indicating device |
| 01/21/1992 | US5083042 Unplugging apparatus |
| 01/19/1992 | CA2046077A1 Programmable inverse time delay circuit |
| 01/15/1992 | CN2093454U High or low voltage phase failure protector |
| 01/15/1992 | CN2093450U Special-purpose power supply protector for telecontrol tv set |
| 01/15/1992 | CN2093449U Three-phase multifunctional electric protector for machine tool |
| 01/15/1992 | CN1057929A Automatic balance device for three phase current leakage |
| 01/14/1992 | CA1294355C Apparatus for rapid recognition of short-circuits |
| 01/09/1992 | WO1992000624A1 A switchboard |
| 01/08/1992 | EP0465384A1 Electronic trip device with improved long-time-delay |
| 01/08/1992 | EP0464516A2 Earth leakage-current protection system |
| 01/08/1992 | CN2092825U Intellect protector for leakage of electricity |
| 01/08/1992 | CN2092824U Switch sensor of transformer |
| 01/08/1992 | CN1057624A Controlling apparatus for elevator door |