| 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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| 04/13/1982 | CA1121901A1 Undervoltage control apparatus for circuit interrupter |
| 04/07/1982 | EP0049235A1 Method of detecting disturbances of an AC electrical voltage causing the switching of the user to another current source |
| 04/06/1982 | CA1121497A1 System for protecting power distribution circuit against ground faults |
| 04/06/1982 | CA1121461A1 Method and apparatus for monitoring faults |
| 04/06/1982 | CA1121418A1 Telescoping disconnect switch with rail-mounted telescope section |
| 03/31/1982 | EP0048657A1 Protective device for electrical apparatuses fed with alternating current |
| 03/30/1982 | US4322773 Telephone circuit protector apparatus |
| 03/30/1982 | US4322771 Triac-protected output circuit |
| 03/30/1982 | US4322768 Multi-terminal protective relay system |
| 03/24/1982 | EP0047749A1 Overcurrent protection devices |
| 03/23/1982 | US4321681 Protective relay apparatus |
| 03/23/1982 | US4321647 Overcurrent relays |
| 03/17/1982 | EP0047673A1 Phase discriminator circuit |
| 03/16/1982 | US4320433 Earth-leakage-current circuit breaker system |
| 03/09/1982 | US4319298 Motor protection device |
| 03/02/1982 | US4318151 Earth leakage protection devices |
| 02/24/1982 | EP0046317A1 Process and arrangement for detecting the direction of a short circuit |
| 02/23/1982 | US4317151 Apparatus for fault direction-comparison protection |
| 02/17/1982 | EP0046024A1 Earth leakage current breaker |
| 02/16/1982 | US4316230 Minimum size, integral, A.C. overload current sensing, remote power controller with reset lockout |
| 02/16/1982 | US4316229 Electric current detector circuit |
| 02/09/1982 | US4315297 Hammer drive safety device for printer |
| 02/09/1982 | US4315295 Timing circuit for an overcurrent relay |
| 02/03/1982 | EP0045286A2 Electronic indicator of absorbed current, expressed as a percentage of a prefixed limit, the exceeding of which activates an acoustic alarm |
| 02/03/1982 | EP0045105A1 Method and apparatus for the differential protection of electrical installations |
| 02/03/1982 | EP0044999A1 Fault-current protective switch responding to fault currents with direct current components |
| 02/02/1982 | US4314302 Communications circuit line protector and method of making the same |
| 02/02/1982 | US4314301 Protective relaying devices |
| 02/02/1982 | US4314199 Method for locating a fault point on a transmission line |
| 01/26/1982 | US4313169 Fault detecting system for locating a fault point with a fault resistance separately measured |
| 01/26/1982 | US4313146 High impedance fault detection on power distribution circuits |
| 01/26/1982 | US4313145 Power output circuit |
| 01/20/1982 | EP0044181A1 A.C. electricity power supply system and methods of and apparatus for load control thereon |
| 01/19/1982 | US4312022 Shock hazard protective apparatus for high voltage system |
| 01/12/1982 | US4310866 Shootthrough fault protection system for bipolar transistors in a voltage source transistor inverter |
| 01/12/1982 | US4309999 Equipment for the homogeneous radiant conditioning of a room enclosure for therapeutic purposes |
| 01/12/1982 | CA1116281A1 Electrical apparatus including interlocking circuit for short-time delay and long-time delay tripping |
| 01/12/1982 | CA1116236A1 Electronic ground detector for armature supplies |
| 01/07/1982 | WO1982000070A1 Discharging circuit for rectifying power source |
| 01/06/1982 | EP0043045A1 Improved life protection device |
| 01/05/1982 | US4309767 Monitor system for a digital signal |
| 01/05/1982 | US4309681 Ground fault receptacle |
| 12/29/1981 | US4308565 Method and apparatus for fault direction determination |
| 12/22/1981 | US4307429 Method and apparatus for monitoring conductor currents for a fault current |
| 12/16/1981 | EP0041809A2 Digital phase sequence detector |
| 12/16/1981 | EP0041578A1 Device for monitoring abnormality in sampled signals |
| 12/15/1981 | US4306270 Electrical system monitoring means |
| 12/15/1981 | US4306266 Circuit arrangement for determining the reactance of a power transmission line in the event of a short circuit |
| 12/15/1981 | US4306264 Disconnect and overload bypass arrangement for a portable tool |
| 12/15/1981 | CA1114488A1 Bridge circuits for sensing currents in a three phase a.c. circuit |
| 12/09/1981 | EP0041374A1 A device for detecting a fault in an n-phase system |
| 12/09/1981 | EP0041202A1 Reclosing device for transmission line |
| 12/08/1981 | US4305108 Three-phase time overcurrent detector |
| 12/08/1981 | CA1114014A1 Combination circuit breaker-lightning arrestor |
| 12/08/1981 | CA1114013A1 Capacitor bank |
| 12/02/1981 | EP0040768A1 Monitoring device for an LC filter circuit of an alternating current network |
| 12/02/1981 | EP0040766A1 Monitoring device for capacitor banks of a three-phase filter circuit |
| 12/02/1981 | EP0040765A1 Monitoring device for a capacitor bank of an alternating current network |
| 11/25/1981 | EP0040471A1 Protective relaying system |
| 11/24/1981 | US4301801 Electrosurge failsafe system |
| 11/18/1981 | EP0040142A1 Measured current-dependent, by this current powered signal generator, and application to current relays |
| 11/17/1981 | US4301491 Combined fault current and applied voltage tripping for solid state trip circuit and particular current transformer construction |
| 11/11/1981 | EP0039618A1 Measuring instruments |
| 11/10/1981 | US4300182 Metering and protection system for an A.C. power system |
| 11/04/1981 | EP0039280A1 Differential protective device responding to a unidirectionel current |
| 11/04/1981 | EP0038837A1 Circuit for automatic discharge protection of a passive current source |
| 11/03/1981 | CA1111912A1 High resistance ground fault detector |
| 10/28/1981 | EP0038621A1 Communications circuit line protector and method of making the same |
| 10/27/1981 | US4297741 Rate sensing instantaneous trip mode network |
| 10/27/1981 | US4297740 Protective relaying apparatus |
| 10/27/1981 | US4297738 Apparatus for and method of detecting high impedance faults on distribution circuits with delta connected loads |
| 10/21/1981 | EP0038259A1 Process for detecting faults of a phase in an electric energy distribution system |
| 10/21/1981 | EP0037885A1 Fault current detecting circuit |
| 10/20/1981 | US4296451 Ultra high speed protective relay circuit |
| 10/14/1981 | EP0037751A1 Static tripping device for an electric circuit-breaking switch |
| 10/13/1981 | US4295175 Pilot wire relay protection system for electrical distribution networks |
| 10/06/1981 | US4293886 Network protector relay |
| 10/06/1981 | US4293813 Current measuring system |
| 10/06/1981 | US4293730 Method and apparatus for detecting a ground on electric furnaces |
| 10/06/1981 | CA1110322A1 Capacitor protective device |
| 10/06/1981 | CA1110318A1 Arc detection and control apparatus |
| 09/30/1981 | EP0036752A1 Protection apparatus for electric power transmission systems |
| 09/29/1981 | US4292585 Leakage current testing circuit |
| 09/29/1981 | US4292543 Electrical energy management devices |
| 09/22/1981 | US4291357 Short circuit protection circuit |
| 09/22/1981 | US4291356 Apparatus for analyzing a physical quantity |
| 09/22/1981 | US4291355 Programmable overload circuit |
| 09/22/1981 | US4291259 Control apparatus for controlling transistor chopper for use in current supply for electric motor |
| 09/15/1981 | US4290007 High power and high voltage transistor control circuit |
| 09/09/1981 | EP0035385A2 Sequence filters for determining the symmetrical components of multiphase AC power systems |
| 09/09/1981 | EP0035120A2 Highly sensitive fault current protection switch responding to any current |
| 09/08/1981 | US4288667 Telescoping disconnect switch with rail-mounted telescope section |
| 09/08/1981 | CA1108765A1 Protective relaying system |
| 09/03/1981 | WO1981002496A1 Overcurrent protection devices |
| 09/01/1981 | CA1108281A1 Dormant oscillator ground to neutral protection for ground fault interrupters |
| 08/25/1981 | US4286303 Protection system for an electric motor |
| 08/18/1981 | US4285023 Rectifier system with failure alarm circuitry |
| 08/18/1981 | US4285022 Devices adapted to detect variations in magnetic flux notably circuit breakers |
| 08/18/1981 | US4284939 Device for detecting opposite phase and open phase |
| 08/18/1981 | US4284175 Emergency stop apparatus for electric elevators |