| 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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| 07/06/1982 | US4338552 Automatic control system for d-c motor |
| 06/30/1982 | EP0055189A2 Transistorised control device with electric motor overload protection |
| 06/29/1982 | CA1126820A1 Circuit for monitoring the current distribution in parallel-connected converter branches |
| 06/24/1982 | WO1982002121A1 Flyback power supply booster circuit |
| 06/23/1982 | EP0054245A1 Door operation control apparatus |
| 06/22/1982 | US4336563 Overcurrent protection circuit for inverter |
| 06/22/1982 | US4336562 H-Switch having short to plus protection |
| 06/22/1982 | US4336487 Generation control apparatus for vehicle generators |
| 06/22/1982 | CA1126387A1 Fault detection device |
| 06/22/1982 | CA1126334A1 Multi-channel generator drive system |
| 06/16/1982 | EP0053760A1 Arrangement for detecting one or more faulty phases in a multiphase electric system |
| 06/15/1982 | US4335345 Current limiting circuit for switching regulator |
| 06/15/1982 | US4335339 Electronic safety device |
| 06/09/1982 | EP0053146A1 Device for cutting off automatically the electric power supply of a motor, and utilisation thereof. |
| 06/08/1982 | US4334264 High voltage direct current transmission apparatus |
| 06/02/1982 | EP0053103A1 Circuit for detecting and signalling failure and irregular operation of a charging device for batteries |
| 06/02/1982 | EP0053069A1 Process for determining the direction of a fault origin, in an electric distribution system |
| 06/02/1982 | EP0052630A1 Field coil fault detector for automotive alternator battery charging systems. |
| 06/01/1982 | US4333119 Power monitor system |
| 05/25/1982 | US4331995 Phase unbalance protector |
| 05/25/1982 | US4331882 Method and means for detecting spurious electrical signals in an electrical power system |
| 05/25/1982 | CA1124320A1 D.c. motors |
| 05/19/1982 | EP0051638A1 Automatic fault protection system for power recovery control |
| 05/18/1982 | US4330816 Overcurrent protection apparatus |
| 05/18/1982 | US4330809 Thermal protection circuit for the die of a transistor |
| 05/18/1982 | US4330808 Automatic control for processing signals from an overheat monitor of a dynamoelectric machine |
| 05/12/1982 | EP0051555A1 Protective circuit for a direct-current motor, especially for a printer take-up roller direct-current motor |
| 05/12/1982 | EP0051416A1 A safety circuit for preventing or reducing phase control system malfunction |
| 05/11/1982 | US4329638 Capacitive voltage transformers |
| 05/11/1982 | US4329637 Control apparatus for a synchronous machine |
| 05/04/1982 | US4328538 Switching arrangement to protect a component against overcurrent due to magnetic saturation of an inductor |
| 05/04/1982 | US4328537 Circuit arrangement for limiting and regulating the collector current of the control element transistor of a switching network component |
| 05/04/1982 | US4328522 Brush speed sensing control for vacuum cleaner |
| 05/04/1982 | CA1123055A1 Method and apparatus for monitoring line voltage in a polyphase source |
| 04/27/1982 | US4327406 DC to AC synthesizer with inverter circuit failure avoidance |
| 04/27/1982 | CA1122647A1 Rapid transit system transient voltage suppression apparatus |
| 04/20/1982 | US4326244 Flyback power supply booster circuit |
| 04/20/1982 | US4326230 Circuit for monitoring the voltage stress of a capacitor |
| 04/20/1982 | CA1122269A1 Amortisseur winding protection system |
| 04/15/1982 | WO1982001276A1 Solid state ballast with high frequency inverter fault protection |
| 04/13/1982 | US4325098 Detection of the position of a fault on an electric link |
| 04/06/1982 | US4323961 Free-running flyback DC power supply |
| 04/06/1982 | CA1121441A1 Thermally stabilized metal oxide varistors |
| 03/31/1982 | EP0048261A1 Microcomputer controlled power tool |
| 03/30/1982 | US4322847 Automatic indirect testing to verify operational control |
| 03/30/1982 | US4322772 Rapid transit system transient voltage suppression apparatus |
| 03/30/1982 | US4322768 Multi-terminal protective relay system |
| 03/30/1982 | US4322766 Monitoring device for the capacitor battery of a d-c filter circuit |
| 03/30/1982 | US4322634 Device for protection in the case of d.c. supply-voltage drop |
| 03/30/1982 | CA1121032A1 Control circuit for protecting vacuum cleaner motor from jammed beater brush damage |
| 03/24/1982 | EP0048140A2 Control circuit for traction vehicle propulsion system |
| 03/24/1982 | EP0047812A2 Method for the electronic actuation and surveillance of the opening and closing cycle of electrically actuated units, such as window winders and electric sliding roofs, especially for motor vehicles, and an electrical-circuit arrangement for carrying out this method |
| 03/23/1982 | US4321645 Differential fault current protection of a multiprocessor controlled electric power generating system |
| 03/16/1982 | US4320444 Control of a HVT (high voltage D-C transmission) short coupler |
| 03/16/1982 | US4320317 Motor overload safety device |
| 03/16/1982 | CA1120111A1 Capacitor protective circuit |
| 03/09/1982 | US4319298 Motor protection device |
| 03/09/1982 | US4319297 Low winding resistance protective device |
| 03/09/1982 | CA1119667A1 High voltage semiconductor converter protective apparatus |
| 03/03/1982 | EP0046545A1 Electrical installation device |
| 03/02/1982 | US4318152 Digital high voltage monitor and display for electrostatic precipitators |
| 02/23/1982 | US4317177 Power priority control system for aircraft and test apparatus therefor |
| 02/23/1982 | US4317176 Microcomputer controlled power tool |
| 02/23/1982 | US4317151 Apparatus for fault direction-comparison protection |
| 02/23/1982 | CA1118839A1 Electronic motor fault detector means |
| 02/16/1982 | CA1118523A1 Anti-pump circuit breaker |
| 02/16/1982 | CA1118491A1 Control circuit for igniting thyristors and reporting back thereon |
| 02/16/1982 | CA1118490A1 Commutation failure detection and restoration for scr frequency converters |
| 02/03/1982 | EP0045105A1 Method and apparatus for the differential protection of electrical installations |
| 02/02/1982 | US4314193 Field coil fault detector for automotive alternator battery charging systems |
| 02/02/1982 | US4314191 Protective system for inverter circuit used in driving AC motors |
| 02/02/1982 | CA1117616A1 Protective circuit for compass repeater amplifier systems |
| 02/02/1982 | CA1117597A1 Apparatus for detecting diode failures in multiple diode rectifier bridges |
| 02/02/1982 | CA1117593A1 Thyristor connection with overvoltage protection |
| 02/02/1982 | CA1117585A1 Relay protection with three-phase tripping at undervoltage |
| 01/26/1982 | US4313169 Fault detecting system for locating a fault point with a fault resistance separately measured |
| 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 | US4311253 Low loss stabilizer |
| 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 |
| 01/05/1982 | US4309735 Protective circuits for converter-supplied D.C. motor |
| 01/05/1982 | CA1115823A1 Control of inverter circuit-breaker |
| 12/29/1981 | US4308565 Method and apparatus for fault direction determination |
| 12/29/1981 | US4308491 Automatic fault protection system for power recovery control |
| 12/29/1981 | US4307793 Elevator system |
| 12/29/1981 | CA1115406A1 Stabilizing equipment for power transmission system |
| 12/24/1981 | WO1981003715A1 Device for cutting off automatically the electric power supply of a motor,and utilisation thereof |
| 12/23/1981 | EP0042305A2 MOS transistor circuit with breakdown protection |
| 12/22/1981 | US4307325 Digital control system for electric motors in power tools and the like |
| 12/22/1981 | CA1114892A1 Method of taking a pole of a high-voltage d-c transmission station out of service |
| 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 | US4306265 Power interruption protection system for electric motors |
| 12/15/1981 | US4306264 Disconnect and overload bypass arrangement for a portable tool |
| 12/15/1981 | US4306184 Generation control appparatus for vehicle generators |
| 12/09/1981 | EP0041469A1 Inductive voltage transformer |
| 12/08/1981 | US4305107 DC Interrupting apparatus |
| 12/08/1981 | CA1114015A1 Apparatus for protecting power transistors in an h configuration power amplifier |
| 12/08/1981 | CA1114014A1 Combination circuit breaker-lightning arrestor |
| 12/08/1981 | CA1114013A1 Capacitor bank |