| 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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| 06/17/1980 | US4208688 Multipole ground fault circuit interrupter with trip level adjustment |
| 06/17/1980 | US4208687 Protective relay apparatus |
| 06/17/1980 | US4208593 Method and system of selective disconnection of loads from a power source |
| 06/17/1980 | CA1079841A1 Sensor for a ground fault circuit interrupter |
| 06/10/1980 | USRE30304 Ground fault protection system |
| 06/10/1980 | CA1079364A1 Fault detector system for starting plasma arc working apparatus |
| 06/10/1980 | CA1079358A1 Phase loss detector |
| 06/10/1980 | CA1079357A1 Ground fault protector with interchangeable rating plug |
| 06/10/1980 | CA1079347A1 Saturating time-delay transformer for overcurrent protection |
| 06/03/1980 | US4206490 Electrical detection, safety and selection circuits |
| 06/03/1980 | US4206443 Protective load disconnect unit for remote load control systems |
| 05/27/1980 | US4205361 Undervoltage control apparatus for circuit interrupter |
| 05/27/1980 | US4205360 Power line carrier apparatus |
| 05/27/1980 | US4205358 Ground fault protection system |
| 05/27/1980 | CA1078507A1 High voltage shutdown circuit responsive to excessive beam current and high voltage |
| 05/27/1980 | CA1078503A1 Open neutral protection |
| 05/13/1980 | US4203142 Ground fault system and method of detection |
| 05/13/1980 | US4203141 Low power dissipation series regulator for PCM repeater lines |
| 05/13/1980 | CA1077614A1 Phase imbalance detection circuit |
| 05/06/1980 | US4202026 Electrode for telephone protector modules |
| 05/06/1980 | US4202023 Overload protector |
| 05/06/1980 | CA1077111A1 Electric blanket control circuit |
| 04/29/1980 | US4200897 Ground leakage current interrupter |
| 04/29/1980 | US4200836 Apparatus for measuring insulation resistance in an operating three-phase ungrounded transmission line system |
| 04/29/1980 | US4200835 Method and apparatus for measuring the insulation resistance of an operating grounded transmission line system |
| 04/29/1980 | US4200105 Electrosurgical safety circuit |
| 04/22/1980 | US4199798 Phase balance monitoring system incorporating voltage and phase sequence monitoring |
| 04/22/1980 | US4199797 Protective circuit for amplifier circuits |
| 04/22/1980 | CA1076213A1 Stimulator fault protection circuit |
| 04/16/1980 | EP0009735A1 Apparatus for detecting opposite phase and open phase |
| 04/16/1980 | EP0009649A1 Circuit for controlling command conditions |
| 04/15/1980 | US4198628 Circuit arrangement for detecting grounds in a static converter |
| 04/15/1980 | US4198562 Electrically heated bedcover with overheat protective circuit |
| 04/15/1980 | CA1075820A1 Power supply interruption detecting circuit |
| 04/08/1980 | US4197567 Portable ground fault circuit interrupter |
| 04/01/1980 | US4196463 Method and apparatus for detecting faults in an electric power distribution system |
| 04/01/1980 | US4196392 Method and apparatus for monitoring and controlling the anode dissipation of transmitters |
| 04/01/1980 | CA1074864A1 Thermoelectric generator overload protective device using hysterisis control |
| 03/25/1980 | US4195325 Means for protecting hazardous areas against electrical faults |
| 03/25/1980 | CA1074375A1 Circuit breaker with improved single coil actuator and undervoltage release mechanism |
| 03/18/1980 | US4194231 Dual voltage ground fault protector |
| 03/18/1980 | US4194230 Hazardous voltage protection circuitry |
| 03/11/1980 | US4193104 Programmable overvoltage protector |
| 03/11/1980 | US4193070 Method and arrangement for controlling the electrical relationships of a current-intensive glow discharge |
| 03/04/1980 | CA1073091A1 Combined mutual drainage reactor and grounding relay |
| 03/04/1980 | CA1073038A1 Ground fault protection system |
| 02/26/1980 | CA1072637A1 Source related potential indicating continuity tester |
| 02/19/1980 | CA1072199A1 Generator circuit-breaker assembly |
| 02/19/1980 | CA1072198A1 Automatic transfer control device and voltage sensor |
| 02/19/1980 | CA1072197A1 Automatic transfer control device and frequency monitor |
| 02/12/1980 | US4188663 Protective device of a current source inverter |
| 02/12/1980 | US4188574 AC Detector for DC ground faults and high capacitance in high-voltage DC power supplies |
| 02/06/1980 | EP0007868A1 Improvements in devices equipped to detect magnetic flux variations, especially in circuit interruptors |
| 02/06/1980 | EP0007867A1 Improvements relating to devices for detecting the rupture of an element in an electric circuit |
| 02/06/1980 | EP0007617A1 Disconnect and overload bypass arrangement for a portable tool |
| 02/05/1980 | US4187525 Ground fault protective apparatus of field windings |
| 02/05/1980 | US4187523 Detecting a short circuit fault in a dynamo electric machine |
| 02/05/1980 | CA1071301A1 Over-current protective apparatus for a power circuit |
| 01/29/1980 | CA1070814A1 Phase sequence correcting system for three-phase ac power |
| 01/29/1980 | CA1070813A1 Over-voltage protection |
| 01/29/1980 | CA1070812A1 Ground fault interrupter apparatus |
| 01/29/1980 | CA1070756A1 Phase monitoring arrangement for a three phase network supplying a d.c. motor through a controlled converter |
| 01/23/1980 | EP0007208A1 A.C. power overload protection control |
| 01/23/1980 | EP0006903A1 Defect current protection swtich, reacting to double biased direct defect currents |
| 01/23/1980 | EP0006894A1 Protective circuit-breaker operated by leakage current. |
| 01/15/1980 | US4184186 Current limiting device for an electric power system |
| 01/15/1980 | CA1070001A1 Control system to check power consumption of an electric distribution network |
| 01/10/1980 | WO1980000050A1 Method and apparatus for detecting faults in an electric power distribution system |
| 01/09/1980 | EP0006602A1 Method and circuit for testing current or voltage fault protective switches |
| 01/08/1980 | US4183071 Control circuit for resetting circuit breaker UVR solenoid |
| 01/08/1980 | US4182982 Current sensing transducer for power line current measurements |
| 12/25/1979 | US4180842 Timer circuit for use in protective relaying applications |
| 12/25/1979 | US4180841 Ground fault circuit interrupter with grounded neutral protection |
| 12/25/1979 | CA1068785A Protective arrangement for dependent switching circuits |
| 12/25/1979 | CA1068783A Short circuit protection circuit |
| 12/25/1979 | CA1068781A Starting surge current protection circuit |
| 12/18/1979 | US4179651 Method and apparatus for supervising an electrical line for short circuits |
| 12/18/1979 | CA1068331A1 Protective circuit for dynamic braking resistors |
| 12/04/1979 | US4177492 Electrical protection circuits |
| 12/04/1979 | US4176542 Analysis instruments |
| 12/04/1979 | CA1067581A1 Power brown-out detector |
| 11/28/1979 | EP0005694A2 Ground fault protective circuit interrupter |
| 11/20/1979 | US4175277 Voltage surge protector |
| 11/20/1979 | US4175255 Device to protect against flow of current |
| 11/14/1979 | EP0005324A1 A new delayed action electrical protection device, depending on an adjusted magnitude |
| 11/13/1979 | US4174496 Monolithic solid state power controller |
| 11/13/1979 | US4174495 Static current limiting switch with soft forced commutation |
| 11/13/1979 | CA1066399A1 Trip circuit for an electric circuit breaker |
| 11/13/1979 | CA1066398A1 Battery backup for ac powered dc supply |
| 11/13/1979 | CA1066358A1 Safety circuit for detecting an electrical insulation defect in an electrical machine |
| 11/06/1979 | US4173774 Parallel AC electrical system with differential protection immune to high current through faults |
| 11/06/1979 | US4173756 Abnormal voltage detection circuit |
| 11/06/1979 | CA1065984A1 Apparatus for calculating amplitude values of sinusoidal waves |
| 11/06/1979 | CA1065964A1 Digital logic control system for three-phase submersible pump motor |
| 11/06/1979 | CA1065960A1 Multi-pole ground fault circuit interrupter with grounded neutral protection |
| 10/30/1979 | USRE30134 Protection of polyphase equipment |
| 10/30/1979 | CA1065406A1 Method of protecting power transmission lines and apparatus for realizing same |
| 10/23/1979 | US4172270 Compressed gas filled circuit breaker |
| 10/09/1979 | CA1064154A1 Resettable overcurrent-protected direct current power supply |
| 10/04/1979 | WO1979000769A1 Circuit breaker having an electronic fault sensing and trip initiating unit |