| Patents for H02H 7 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions (32,726) |
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| 08/12/1980 | US4217621 Circuit for detecting diode shorting |
| 08/12/1980 | US4217620 Circuit for controlling induction in current transformers |
| 08/12/1980 | US4217616 Motor overload protection circuit |
| 08/06/1980 | EP0014175A1 Differential safety system for a multiphase transformer |
| 08/05/1980 | US4216514 Protective device for brushless exciting device |
| 08/05/1980 | US4216421 Apparatus and method for the thermal simulation of a constant load electric motor |
| 07/29/1980 | US4215383 Current regulator for DC motors including sensitivity control means therefor |
| 07/24/1980 | WO1980001526A1 Control for direct-current motor with separately excited field |
| 07/24/1980 | WO1980001516A1 Improvement relating to voltage capacitive transformers |
| 07/22/1980 | US4214289 Stabilizing equipment for power transmission system |
| 07/15/1980 | CA1081740A1 Overcurrent latch for magnetic contactor |
| 07/10/1980 | WO1980001442A1 Supervision device with an optical detector for electrical arcs in a circuit-breaker |
| 07/08/1980 | US4212024 Solid-state switching circuit employing photon coupling suitable for construction in form of integrated circuit |
| 07/01/1980 | US4210948 Method and apparatus for monitoring line voltage in a polyphase source |
| 07/01/1980 | US4210947 Protective circuit for a switching regulator |
| 07/01/1980 | US4210855 Apparatus for regulating the current drawn from an electric battery |
| 07/01/1980 | CA1080842A1 Protection circuits |
| 07/01/1980 | CA1080805A1 Circuit for detecting a malfunction in a self-commutating inverter |
| 06/25/1980 | EP0012547A1 Conduction limit protection arrangement for power transistor switch |
| 06/24/1980 | US4209826 Regulated switching mode power supply |
| 06/24/1980 | US4209815 Capacitor protective circuit |
| 06/24/1980 | CA1080300A1 Relay protection for capacitor banks |
| 06/17/1980 | US4208708 Current limiting arrangement for DC electrical apparatus |
| 06/17/1980 | US4208691 Control of inverter circuit-breaker |
| 06/17/1980 | US4208687 Protective relay apparatus |
| 06/17/1980 | US4208621 Brushless DC motor control system |
| 06/17/1980 | US4208591 Gas turbine power plant control apparatus including a turbine load control system |
| 06/10/1980 | US4207602 Protector means for electric motor |
| 06/10/1980 | US4207584 Safety device for protecting semiconductor components against excessive voltage rise rates |
| 06/10/1980 | US4207503 Battery supplied motor current control system with safety circuit |
| 06/10/1980 | CA1079364A1 Fault detector system for starting plasma arc working apparatus |
| 06/10/1980 | CA1079349A1 Protection arrangement for a brushless synchronous machine |
| 06/10/1980 | CA1079348A1 Protection circuitry for cable transmission system |
| 06/10/1980 | CA1079347A1 Saturating time-delay transformer for overcurrent protection |
| 06/03/1980 | US4206443 Protective load disconnect unit for remote load control systems |
| 05/27/1980 | US4205359 Safety type electric field curtain apparatus |
| 05/27/1980 | US4205211 Surface alloying apparatus including safety circuit |
| 05/27/1980 | CA1078507A1 High voltage shutdown circuit responsive to excessive beam current and high voltage |
| 05/20/1980 | US4204237 Solid state transformer differential relay |
| 05/20/1980 | CA1078072A1 Semiconductor device having a safety circuit |
| 05/20/1980 | CA1078017A1 Corona discharge monitor system |
| 05/20/1980 | CA1078013A1 D.c. pulse width modulated power supply |
| 05/14/1980 | EP0010980A1 Overcurrent protection circuitry for an electric motor driving circuit |
| 05/14/1980 | EP0010979A1 AC electric motor driving circuit having overload protection circuitry |
| 05/14/1980 | EP0010811A1 Switching transistor over-voltage protection means |
| 05/13/1980 | US4203142 Ground fault system and method of detection |
| 05/13/1980 | US4203058 Failure detection circuit for dynamic braking system |
| 04/30/1980 | EP0010391A1 Control circuit for a motor driven automatic valve |
| 04/29/1980 | US4200907 Method of taking a pole of a high-voltage d-c transmission station out of service |
| 04/29/1980 | US4200832 Overload detecting scheme for an electric propulsion system for traction vehicles |
| 04/29/1980 | US4200829 Circuit for protecting induction motors |
| 04/15/1980 | US4198628 Circuit arrangement for detecting grounds in a static converter |
| 04/08/1980 | US4197532 Electronic motor fault detector means |
| 04/02/1980 | EP0009365A1 Transformer differential safety systems |
| 04/02/1980 | EP0009225A1 Protective circuit |
| 04/01/1980 | US4196462 Protective control circuit for induction motors |
| 04/01/1980 | US4195528 Fault detection device |
| 04/01/1980 | CA1074864A1 Thermoelectric generator overload protective device using hysterisis control |
| 03/25/1980 | US4195306 Gate turn-off thyristor |
| 03/25/1980 | US4195254 Control circuit for a D.C. motor |
| 03/19/1980 | EP0008872A1 A circuit for indicating the reverse connection of connection leads with the terminals of an electromotive force source |
| 03/18/1980 | US4194145 Method for monitoring the run-up to speed of asynchronous motors and apparatus for the performance thereof |
| 03/11/1980 | US4193070 Method and arrangement for controlling the electrical relationships of a current-intensive glow discharge |
| 03/04/1980 | US4191992 Method of and apparatus for enabling soft-failure of modular power converter systems, including RF generator systems, embodying switching components in the power conversion |
| 03/04/1980 | US4191925 Power line protection circuit |
| 03/04/1980 | US4191915 Door operating apparatus |
| 03/04/1980 | CA1073049A1 Main field current transient control circuit for dynamoelectric machines |
| 02/26/1980 | US4190873 Protective device for an electron tube |
| 02/19/1980 | CA1072199A1 Generator circuit-breaker assembly |
| 02/12/1980 | US4188663 Protective device of a current source inverter |
| 02/12/1980 | CA1071748A1 Circuit breaker solid state trip unit incorporating trip indicating circuit |
| 02/06/1980 | EP0007617A1 Disconnect and overload bypass arrangement for a portable tool |
| 02/05/1980 | US4187527 Electrostatic coating system |
| 02/05/1980 | US4187525 Ground fault protective apparatus of field windings |
| 02/05/1980 | US4187524 Series capacitor protection equpment with extended range dual sparkover feature |
| 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 | US4186418 Overvoltage protected integrated circuit network, to control current flow through resistive or inductive loads |
| 01/29/1980 | US4186417 Capacitor protective system |
| 01/29/1980 | US4186391 Apparatus for detecting diode failures in multiple diode rectifier bridges |
| 01/29/1980 | CA1070814A1 Phase sequence correcting system for three-phase ac power |
| 01/29/1980 | CA1070762A1 D.c. to a.c. electronic inverter with overload protection |
| 01/29/1980 | CA1070757A1 Field overvoltage protecting apparatus for synchronous machine |
| 01/29/1980 | CA1070756A1 Phase monitoring arrangement for a three phase network supplying a d.c. motor through a controlled converter |
| 01/22/1980 | US4185208 Anti-pump circuit breaker |
| 01/22/1980 | US4185177 Latch operated tap changing switch for transformer regulating system |
| 01/08/1980 | US4183072 Protective relaying system |
| 01/01/1980 | US4181840 Anticipative turbine control |
| 01/01/1980 | CA1069186A Inverter circuit for induction heating cooking ovens with a protection device |
| 12/25/1979 | CA1068785A Protective arrangement for dependent switching circuits |
| 12/25/1979 | CA1068782A Protective circuit for thyristors |
| 12/25/1979 | CA1068781A Starting surge current protection circuit |
| 12/25/1979 | CA1068770A Corona current interrupter |
| 12/18/1979 | US4179651 Method and apparatus for supervising an electrical line for short circuits |
| 12/18/1979 | CA1068384A1 Lift truck control providing time delay in operation of directional contactor |
| 12/11/1979 | US4178619 Protective integrated circuit network, particularly for connection to an inductive load |
| 12/04/1979 | US4177493 High voltage antenna protection system |
| 12/04/1979 | CA1067575A1 Constant current supply |
| 11/13/1979 | US4174529 Protective circuit for zinc oxide varistors |
| 11/13/1979 | US4174495 Static current limiting switch with soft forced commutation |