| Patents for H02H 1 - Details of emergency protective circuit arrangements (5,580) |
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| 06/12/1991 | EP0431512A1 Device for measuring a voltage |
| 05/30/1991 | WO1991007795A1 Faulted current indicator with protection against temporary overloads and transients |
| 05/29/1991 | EP0429159A2 Relay with ARC sensor |
| 05/29/1991 | EP0429158A2 Relay with control ciruit to minimize arcing |
| 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 |
| 05/02/1991 | EP0425169A2 Electrical energy storage system |
| 04/28/1991 | CA2028388A1 Electrical energy storage system |
| 04/16/1991 | US5008516 Relay control method and apparatus for a domestic appliance |
| 04/10/1991 | EP0421204A2 An overcurrent protection apparatus |
| 03/26/1991 | US5003426 Faulted current indicators and inrush restraints therefor |
| 03/01/1991 | WO1991003826A1 Processor controlled circuit breaker trip system having reliable status display |
| 03/01/1991 | WO1991003825A1 Fault powered, processor controlled circuit breaker trip system having reliable tripping operation |
| 02/12/1991 | US4992723 For a circuit breaker |
| 01/23/1991 | EP0409327A2 Power supply with DC-voltage monitoring circuit |
| 01/22/1991 | US4987512 Solid state circuit protector |
| 01/16/1991 | CN1048635A Solid-state trip unit for dc circuit breakers |
| 01/09/1991 | EP0407105A2 Solid-state trip unit for DC circuit breakers |
| 01/09/1991 | EP0406276A1 Monitoring and fault protection of high voltage switchyards. |
| 01/08/1991 | US4984124 Faulted current indicator with inrush restraint |
| 01/03/1991 | CA2019892A1 Solid - state trip unit for dc circuit breakers |
| 12/12/1990 | EP0401299A1 A monitoring system. |
| 11/28/1990 | EP0399283A2 An actuator device for emergency controls |
| 11/20/1990 | US4972289 Electric motor control and protective assembly for fluid pump operation |
| 10/18/1990 | WO1990012352A1 Fault-powered power supply |
| 10/04/1990 | DE3917478C1 Energy storage earth leakage protection switch - has summation current transformer with trip circuit connected across its sec. winding |
| 09/30/1990 | CA2012020A1 Fault-powered power supply |
| 09/20/1990 | WO1990010967A1 Solid state circuit protector |
| 09/13/1990 | DE4006259A1 Schaltungsanordnung zum detektieren von lichtbogenueberschlaegen in elektrischen kabeln Circuitry for detecting of lichtbogenueberschlaegen in electrical cables |
| 09/11/1990 | US4956741 Solid-state trip unit for DC circuit breakers |
| 08/02/1990 | DE3902416A1 Overcurrent-sensitive circuit breaker |
| 07/19/1990 | DE3906955C1 Electronic fuse (safety device) for a transistor output stage |
| 07/05/1990 | DE3844203A1 Domestic installation system |
| 06/28/1990 | DE3842921A1 Circuit arrangement for monitoring the current of electrical loads |
| 06/26/1990 | US4937769 Apparatus and method for reducing transient exponential noise in a sinusoidal signal |
| 06/12/1990 | US4933799 Highly efficient over current circuit breaker |
| 06/05/1990 | US4931894 Ground fault current interrupter circuit with arcing protection |
| 05/22/1990 | US4928220 Switching mode DC-to-DC power supply with improved current sensing |
| 05/02/1990 | EP0366063A1 Electrical power supply for a protection station of a three-phase transmission line |
| 05/01/1990 | US4922368 Method and apparatus for detecting and discriminating faults in transmission circuits |
| 04/19/1990 | WO1990004278A1 Apparatus and method for detecting a potentially fire generating electrical fault |
| 04/03/1990 | US4914541 Solid-state trip device comprising an instantaneous tripping circuit independent from the supply voltage |
| 03/21/1990 | CN1040684A Monitoring and fault protection of high voltage switch yards |
| 02/14/1990 | CN1039659A Abnormality diagnosing system and method for high voltage power apparatus |
| 02/13/1990 | US4901219 For a load center distributing electrical power |
| 02/07/1990 | EP0353986A2 Relay control method and apparatus for a domestic appliance |
| 02/06/1990 | US4899383 Apparatus and method for secure digital communication |
| 01/30/1990 | US4897755 Apparatus and method for relay control |
| 01/10/1990 | EP0350028A2 Circuit breaker |
| 01/03/1990 | EP0349273A2 Apparatus and method for relay control |
| 01/03/1990 | CN1038551A Solid-state trip apparatus comprise circuit of instantaneous trip independent of power voltage |
| 12/05/1989 | US4885655 Water pump protector unit |
| 11/29/1989 | EP0343536A1 Circuit for controlling the power supply of an electrical load, having a device for detecting a short-circuit of the load |
| 11/28/1989 | US4884164 Molded case electronic circuit interrupter |
| 11/23/1989 | EP0342597A2 Abnormality system for a high voltage power supply apparatus |
| 11/15/1989 | CN2047851U Alarm for a misoperation of opening the door to electric power network |
| 11/07/1989 | CA1262771A1 Ground-fault circuit interrupter |
| 10/31/1989 | US4878241 Audio frequency interface for differential relays |
| 10/31/1989 | US4878144 Solid-state trip device of a molded case circuit breaker |
| 10/31/1989 | US4878142 High resistance ground fault protection |
| 10/24/1989 | US4876624 Apparatus for detecting unsymmetrical bipolar waveforms |
| 10/18/1989 | EP0336943A1 Phase loss detection circuit including transient protection |
| 10/10/1989 | US4873602 Ripple attenuator for AC power transmission line protective relays |
| 10/05/1989 | WO1989009411A1 Monitoring and fault protection of high voltage switchyards |
| 10/03/1989 | US4871971 High impedance fault analyzer in electric power distribution networks |
| 09/26/1989 | US4870532 Electric circuit for operating trip circuit of a circuit breaker |
| 09/26/1989 | US4870529 Active arc protection circuit |
| 09/20/1989 | EP0225337B1 Device for the detection of corona discharges in alternating current overhead lines |
| 09/20/1989 | CN1035720A Portable, micro-computer controlled, multifunctional tester of protective relay |
| 09/12/1989 | CA1259376A1 Protective control method and apparatus |
| 08/24/1989 | WO1989007852A1 A monitoring system |
| 08/22/1989 | US4860157 Molded case circuit breaker actuator-accessory module |
| 08/22/1989 | US4860153 Current sensing device |
| 08/22/1989 | US4860146 Differential current protection circuit breaker |
| 08/15/1989 | US4858058 Circuit breaker including selectively operable long-time-delay tripping circuit |
| 08/15/1989 | US4858056 Molded case circuit breaker actuator-accessory module |
| 08/15/1989 | US4858054 Protective circuits and devices for the prevention of fires |
| 08/09/1989 | CN1034639A Solid-state trip device of molded case circuit breaker |
| 08/02/1989 | EP0326459A1 Static tripping device with a circuit for instantaneous tripping independent of the supply voltage |
| 08/02/1989 | EP0326237A2 Control circuit with validity-determining arrangement |
| 08/01/1989 | US4853818 System and method for detecting arcing in dynamoelectric machines |
| 07/27/1989 | DE3801776A1 Protection circuit for a load resistor (load), which is connected to a motor vehicle battery, and its switching output stage |
| 07/25/1989 | US4851950 Electrical apparatus for magnetothermal and differential protection |
| 07/25/1989 | US4851782 High impedance fault analyzer in electric power distribution |
| 07/18/1989 | US4849848 Circuit breaker |
| 07/13/1989 | DE3841491A1 Method and device for limiting the current and/or voltage of power electronics components or devices |
| 06/22/1989 | DE3805948A1 Overcurrent (line) circuit breaker |
| 06/20/1989 | US4841404 Pump and electric motor protector |
| 06/14/1989 | EP0320409A1 Static release with external supply |
| 06/13/1989 | US4839770 Control circuit with validity-determining arrangement |
| 06/06/1989 | CA1255359A1 Control apparatus for the electronic detection in alternating current transmission lines of fault locations causing power losses |
| 05/31/1989 | EP0318274A2 Method and apparatus for detecting and discriminating faults in transmission circuits |
| 05/30/1989 | US4835648 Gas insulated switchgear |
| 05/23/1989 | US4833563 Molded case circuit breaker actuator-accessory module |
| 05/16/1989 | EP0299060A4 High impedance fault analyzer in electric power distribution. |
| 04/27/1989 | DE3735012A1 Overvoltage protection circuit |
| 04/26/1989 | EP0313422A1 Static tripping device for a circuit breaker in a cast case |
| 04/18/1989 | US4823226 Phase loss detection circuit including transient protection |
| 04/12/1989 | EP0311251A2 Apparatus and method for secure digital communication |
| 04/04/1989 | US4819117 Method and apparatus for detecting excessive current draw in an electrical load |