| 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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| 01/07/1992 | US5079666 Power supply shutdown through loss of sync |
| 01/07/1992 | US5079542 Abnormal temperature detector for electronic apparatus |
| 01/04/1992 | CA2045043A1 Electronic trip device comprising an improved long delay function |
| 01/02/1992 | EP0463860A2 Faulted circuit detector having isolated indicator |
| 01/02/1992 | DE4019829A1 AC solid-state power controller - includes opto-coupler to turn off gate voltage and solid-state switch under overvoltage or overload conditions |
| 01/01/1992 | CN2092158U Full-automatic quick charger |
| 01/01/1992 | CN2092157U Leakage protector able to automatically restoring electric supply |
| 01/01/1992 | CN2092156U Auto-switch for elongating life of electric appliances |
| 12/31/1991 | US5077629 Switch with pre-alarms means |
| 12/31/1991 | US5077627 Solid-state trip device for a protective circuit breaker of a three-phase mains system, enabling the type of fault to be detected |
| 12/26/1991 | WO1992000580A1 Faulted circuit detector having isolated indicator |
| 12/26/1991 | CA2041861A1 Faulted circuit detector having isolated indicator |
| 12/25/1991 | CN2091504U Fully automatic multi-functional voltage-adjusting protector |
| 12/25/1991 | CN2091503U Voltage-stabilizing saving temp.-adjusting protector for refrigerator |
| 12/25/1991 | CN2091502U Pulse leakage relay |
| 12/25/1991 | CN2091501U Explosion light electric drill transformer protecting device |
| 12/25/1991 | CN1057367A Fast overload and overcurrent fuse |
| 12/24/1991 | US5075628 Insulation monitoring system of a direct current power supply system |
| 12/24/1991 | CA1293532C Load-dependent current limit for the power supply of a multi-module electronic system |
| 12/18/1991 | CN2091057U Auto-commutation all-protection electronic ballast |
| 12/17/1991 | US5073724 Programmable inverse time delay circuit |
| 12/12/1991 | WO1991019341A1 Electrical protection devices |
| 12/12/1991 | WO1991019340A1 Electrical protection devices |
| 12/12/1991 | WO1991019339A1 Electrical protection devices |
| 12/12/1991 | CA2018831A1 A.c. power controller with short circuit and overload protection |
| 12/11/1991 | CN2090602U Electronic transformer with high-efficiency protection for neon lamp |
| 12/11/1991 | CN2090589U Full-automatic multifunction overvoltage protector |
| 12/11/1991 | CN2090588U Mltifunction electricity-saving protector for refrigerator |
| 12/10/1991 | US5072327 Electronic protection device for use with a fuse mount |
| 12/10/1991 | CA1293022C Test device for circuit breakers having electronic trip units |
| 12/04/1991 | EP0458783A1 Improvements in or related to circuit breakers used with electrical apparatus |
| 12/04/1991 | CN2090122U Multifunction electromagnetic leakage protective switch |
| 12/04/1991 | CN2090121U Static votage relay |
| 12/03/1991 | US5070537 System for detecting defective point on power transmission line by utilizing satellite |
| 12/01/1991 | CA2041328A1 Rectifier cabinet static breaker |
| 11/30/1991 | CA2017917A1 Ground fault electrical panel |
| 11/27/1991 | CN2089668U Phase-lost, leakage protector for three phase motor |
| 11/27/1991 | CN2089666U Current overload protector |
| 11/23/1991 | WO1991018441A1 A power supply |
| 11/23/1991 | CA2063561A1 Power supply |
| 11/21/1991 | DE4015724A1 Thyristor-controlled relay for overcurrent or overheat protection - is tripped by triac with two=stage thyristor firing circuit and reset by simple key switch |
| 11/20/1991 | CN2089214U Electric testing and controlling apparatus for three-phase four-wire system |
| 11/20/1991 | CN2089213U Electricity limiter for avoiding or indicating fraudulent use of electricity |
| 11/20/1991 | CN1056288A Safety apparatus for elevator |
| 11/19/1991 | US5066920 Correction procedure of the phase difference introduced by a zero sequence toroid of leakage current and isolation monitor this procedure |
| 11/18/1991 | WO1991018438A1 A ground fault circuit interrupter |
| 11/18/1991 | WO1991018437A1 A ground fault circuit interrupter having loss of neutral or loss of ground protection |
| 11/14/1991 | WO1991017596A1 Loss of neutral or ground protection circuit |
| 11/14/1991 | DE4037722C1 Current supply circuitry with no mains transformer - has controlled transistor acting as limiting stage across output of rectifier stage |
| 11/14/1991 | DE4015301A1 Overvoltage protection indicator for electrical plants - has safety output devices in branches from phase lines to varistors unit with remote signalling relays |
| 11/13/1991 | EP0456238A1 Device for multiphase current monitoring |
| 11/13/1991 | EP0456172A2 Single pole or multipole relay for motor protection or overcurrent protection |
| 11/13/1991 | EP0402362A4 Electrical load shedding circuit |
| 11/13/1991 | CN2088752U Electric appliances protective starter |
| 11/11/1991 | WO1991017492A1 Ac power conditioning circuit |
| 11/07/1991 | DE4112648A1 Temp. monitor with safety switch for electric drive - interrupts signal from sensor to processor brought into operation after run-up delay to operate contactor |
| 11/07/1991 | CA2016217A1 Loss of neutral or ground protection circuit |
| 11/06/1991 | EP0455484A2 Over-current controller |
| 11/06/1991 | EP0455314A2 Remote protection of three phase distribution transformers |
| 11/06/1991 | CN2088303U Soundless, power-saving phase-detecting leakage protector |
| 11/06/1991 | CN2088302U Domestic tv-set ( electrical appliance ) protector |
| 11/06/1991 | CN2088301U Power-saving alarm |
| 11/06/1991 | CN1056023A Carrier-type device for electric shock protection and avoiding fraudulent use of electricity |
| 10/31/1991 | WO1991016751A1 Solid state overcurrent protection system for circuit breakers |
| 10/31/1991 | DE4013826A1 Brightness control with overvoltage protection of resonant circuit - is broken by heating of bimetallic switch when secondary unloaded operation of transformer is detected |
| 10/30/1991 | CN2087835U 多功能节能保护器 Multifunction saving protection |
| 10/29/1991 | CA1291535C Apparatus for detecting malfunctions of an electrical device and methods of constructing and utilizing same |
| 10/23/1991 | EP0453057A2 Remote protection of three phase distribution transformers |
| 10/23/1991 | EP0453056A2 Remote protection of three phase distribution transformers |
| 10/23/1991 | CN2087395U Multifunctional all-automatic electric source |
| 10/23/1991 | CN2087393U Six-function voltage-stabilizing protector for refrigerator |
| 10/23/1991 | CN2087344U New-type protector against embezzling electricity |
| 10/22/1991 | US5060166 Method and apparatus for rapidly analyzing AC waveforms containing DC offsets |
| 10/22/1991 | CA1291215C Fault detection |
| 10/22/1991 | CA1291207C Auto-reset circuit breaker |
| 10/17/1991 | WO1991015890A1 Arcing fault detector |
| 10/17/1991 | WO1991015297A1 Process for controlling the current supply device of an electrofilter |
| 10/16/1991 | EP0452250A1 Fault-current protective switchgear |
| 10/16/1991 | EP0452218A2 An apparatus for detecting failure in power system |
| 10/16/1991 | EP0452175A1 Electronic protective relay for polyphase load |
| 10/16/1991 | EP0451154A1 High voltage power supply control system |
| 10/15/1991 | US5057811 Electrothermal sensor |
| 10/10/1991 | DE4108811A1 Regulating current supply to electro-filter - measuring parameters on primary side for regulation of filter voltage |
| 10/10/1991 | DE4009483C1 Self monitoring short circuit detector - has motor supply leads with DC transducers coupled via amplifier to self testing control |
| 10/09/1991 | EP0451110A2 Device for disconnection of loads powered by an uninterruptible power supply when a short-circuit occurs |
| 10/09/1991 | EP0450834A2 Stall protection circuit for an electronically commutated motor |
| 10/09/1991 | EP0449843A1 Circuit breaker warning relay and control accessory |
| 10/09/1991 | EP0449822A1 Electronic control and protection device. |
| 10/09/1991 | CN2086470U Using electricity protector with lightning arrester |
| 10/09/1991 | CN2086469U Domestic comprehensive protecting switch for leakage of electricity |
| 10/08/1991 | US5056032 Compressor motor protection system |
| 10/02/1991 | EP0448619A1 Method and apparatus for protecting electrical systems. |
| 10/02/1991 | CN2086012U High-voltage power supply with open circuit protector |
| 10/02/1991 | CN2086011U Energy-saving current-limiter |
| 10/02/1991 | CN2085967U Multipurpose protector for preventing fraudulent use and leakage of electricity |
| 10/02/1991 | CN1054950A Controlling apparatus for elevator door |
| 09/26/1991 | DE4008970A1 Protection unit for electric insulated appliance without earth - has fault or differential current switch with protection conductor monitor tripping upon under voltage |
| 09/25/1991 | CN2085574U Electric leakage protector capable of preventing cutting-off neutral conductor |
| 09/25/1991 | CN2085573U Controller for prohibiting from using of electric stove in hostel |
| 09/25/1991 | CN2085524U Electricity limiter |