| 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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| 02/26/1985 | US4501963 Reversing device for roller doors |
| 02/20/1985 | EP0133261A2 Carrier relay system |
| 02/19/1985 | US4500834 Apparatus and method for locating the position of a fault occurring in an electric power transmission system with respect to a monitoring point |
| 02/13/1985 | EP0133128A1 Overcurrent protection device |
| 02/12/1985 | US4499417 Determining location of faults in power transmission lines |
| 02/05/1985 | US4498128 Current limit circuit in single-ended forward converter utilizing core reset to initiate power switch conduction |
| 01/31/1985 | WO1985000464A1 Mechanically operated pressure switch having solid state components |
| 01/30/1985 | EP0132266A1 Direct current cable protection system |
| 01/23/1985 | EP0131718A1 Device for detecting a short circuit in the winding of the rotor of an electric machine |
| 01/22/1985 | US4495536 Voltage transient protection circuit |
| 01/17/1985 | WO1985000253A1 Parallel mosfet power switch circuit |
| 01/16/1985 | EP0130981A1 Short circuit protection apparatus. |
| 01/15/1985 | US4494162 Starter thermal overload protection system |
| 01/15/1985 | CA1181157A1 Overspeed protective apparatus for a portable tool |
| 01/09/1985 | EP0130547A1 Voltage protective apparatus for variable-frequency power system |
| 01/02/1985 | CA1180379A Automatic fault protection system for power recovery control |
| 12/25/1984 | US4490656 Overload protection in a motor control system |
| 12/19/1984 | EP0128344A1 Arrangement of surge arresters for a transformer |
| 12/11/1984 | US4488200 No-break power supply apparatus |
| 12/11/1984 | US4488198 Protective circuit for clutchless parallel generating system |
| 12/11/1984 | EP0087424A4 Inverter connection with bridge for transforming direct current into single phase or multiphase alternating current. |
| 12/11/1984 | CA1179430A1 Solid state ballast |
| 12/05/1984 | EP0127302A1 Protective relay apparatus and method for providing single-pole tripping |
| 12/05/1984 | EP0127163A1 Fault recognition circuit for parallel-load feeding-power supply devices |
| 12/04/1984 | US4486802 Driving circuit for short circuit-proof readout stages |
| 12/04/1984 | US4486801 Generator shorted diode protection system |
| 12/04/1984 | CA1179005A1 Common suspension multi-line grounding protective relay |
| 11/27/1984 | US4485427 Fold-back power supply |
| 11/27/1984 | US4485342 Load driving circuitry with load current sensing |
| 11/21/1984 | EP0125796A1 System and apparatus for monitoring and control of a bulk electric power delivery system |
| 11/20/1984 | US4484245 Directional comparison blocking protective relay system |
| 11/20/1984 | US4484244 Protection circuit for integrated circuit devices |
| 11/20/1984 | US4484165 Circuit control device |
| 11/20/1984 | US4484127 Inverter power transistor protection |
| 11/14/1984 | EP0124719A1 Current-type GTO/inverter |
| 11/13/1984 | US4482930 Electrical protection equipment with digital integration apparatus for firing pulse initiation |
| 11/13/1984 | US4482031 AC elevator control apparatus |
| 11/07/1984 | EP0123728A1 Circuit for monitoring electric motors |
| 11/07/1984 | EP0030980B1 Stabilized dc power source |
| 11/06/1984 | US4481553 Protection circuit |
| 11/06/1984 | US4481521 Insulated gate field effect transistor provided with a protective device for a gate insulating film |
| 10/31/1984 | EP0123129A1 Apparatus for detecting ground fault in variable-voltage variable-frequency power system |
| 10/25/1984 | WO1984004214A1 Inverter apparatus |
| 10/17/1984 | EP0121990A1 Electrical monitoring systems |
| 10/16/1984 | US4477857 Printed circuit fuse |
| 10/16/1984 | US4477854 Portective relay with second harmonic suppression |
| 10/16/1984 | US4477758 Stepping motor overcurrent detection and protection device |
| 10/16/1984 | US4477748 Solid state ballast |
| 10/09/1984 | US4476427 Pulse signal processing circuit having a protection circuit against over-current breakdown |
| 10/09/1984 | US4476423 For limiting the starts of a motor |
| 10/09/1984 | CA1175894A1 Line break protection for multispeed motor |
| 10/03/1984 | EP0120723A1 Process and device for detecting speed reduction of a DC motor, and a motor comprising such a device |
| 10/03/1984 | EP0120209A2 Method of detecting frequency in power system |
| 10/02/1984 | US4475150 Coordinated load commutated inverter protection system |
| 10/02/1984 | US4475094 Circuit control device |
| 09/26/1984 | EP0119744A1 Relay for pilot protection of electrical power lines |
| 09/25/1984 | US4473856 Overcurrent protection apparatus for DC motor |
| 09/25/1984 | US4473782 Drive circuit for brushless direct-current motors |
| 09/25/1984 | CA1175107A1 Device for detecting faulty phases in a multi-phase electrical network |
| 09/25/1984 | CA1175102A1 Motor protection circuit |
| 09/25/1984 | CA1175097A1 Method for limiting voltage across series-connected thyristors of high-voltage rectifier |
| 09/19/1984 | EP0119142A1 Electric motor power supply unit for a portable machine allowing protection against the reaction torque |
| 09/19/1984 | EP0119042A1 Protective relay system |
| 09/19/1984 | EP0118779A1 Voltage regulator for charging generator |
| 09/18/1984 | US4472666 Brushless DC motor |
| 09/12/1984 | EP0118074A1 A safety circuit for the electrical control of a motor vehicle electric window actuator unit |
| 09/11/1984 | US4471420 Protection circuit for thyristors in an inverter in rail-bound vehicles |
| 09/11/1984 | US4471400 Protection of appliances against reversal of battery polarity |
| 09/11/1984 | US4471287 Charging generator control apparatus |
| 09/11/1984 | US4471274 Vehicle door control apparatus |
| 09/11/1984 | US4471229 Method and apparatus for controlling a turbo-generator set |
| 09/05/1984 | EP0053146B1 Device for cutting off automatically the electric power supply of a motor, and utilisation thereof |
| 09/04/1984 | US4470093 Protective relay system and sampling synchronizing method therefor |
| 09/04/1984 | US4470092 Programmable motor protector |
| 09/04/1984 | US4470091 Productive relay apparatus for protection from sub-synchronous current oscillations in a power system |
| 09/04/1984 | CA1173905A1 Fault anticipation apparatus for high voltage electrical equipment |
| 08/29/1984 | EP0117133A1 Control of electrically driven pumps |
| 08/29/1984 | EP0116987A1 Irradiation device |
| 08/28/1984 | US4468715 On/off and shutdown circuit for CRT projection system |
| 08/28/1984 | US4468714 Zone selective interlock module for use with static trip circuit breakers |
| 08/28/1984 | US4468596 Method and apparatus for the electronic operation and monitoring of the opening cycle or closing cycle of electrically operable units |
| 08/28/1984 | CA1173500A1 Unintentional impedance detection system |
| 08/28/1984 | CA1173499A1 Power supply inverter controls |
| 08/21/1984 | US4467384 Protective device for DC regulated power supplies for superconducting magnet coils |
| 08/21/1984 | CA1173122A1 Capacitor apparatus with an individual discharge damping device for each capacitor unit |
| 08/21/1984 | CA1173085A1 Molded case circuit breaker with static tripping unit |
| 08/16/1984 | WO1984003181A1 Short-protected buffer circuit |
| 08/15/1984 | EP0115797A1 Protective device for a superconductive electro-magnet apparatus |
| 08/14/1984 | US4466039 Open circuit current transformer protection circuit |
| 08/14/1984 | US4465924 Protective control arrangement for duty cycle controlled sheathed heating elements |
| 08/14/1984 | CA1172736A1 Motor protection control circuit |
| 08/08/1984 | EP0115002A2 Voltage transient protection circuit |
| 08/07/1984 | US4464709 Current and voltage protection for a power supply circuit |
| 08/07/1984 | US4464697 Protective relay system |
| 08/07/1984 | US4464583 Apparatus for bonding and protecting electrical cable shields |
| 07/31/1984 | US4463401 Interface circuit apparatus |
| 07/31/1984 | US4463369 Integrated circuit overload protection device |
| 07/31/1984 | CA1171905A1 Electronic protective circuit |
| 07/24/1984 | US4462058 Switching apparatus for devices for alternating current parallel remote feed |
| 07/24/1984 | US4461986 Motor control apparatus with phase related detector |