Patents for H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (21,232) |
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10/03/1979 | EP0004350A1 Aerial power transmission system |
10/03/1979 | EP0004348A1 Lightning arrester device for power transmission line |
09/25/1979 | CA1063180A1 Power supply for magnetron |
09/18/1979 | US4168514 Combination circuit breaker-lightning arrestor |
09/18/1979 | CA1062776A1 Filter capacitor charging circuit |
09/18/1979 | CA1062769A1 Field protector for synchronous machines |
09/04/1979 | US4167030 Protective circuit for an electronic switching amplifier in series with an electromagnet |
08/28/1979 | CA1061402A1 Voltage surge arrester with capacitive grading and improved sparkover for fast impulses |
08/21/1979 | US4165527 Current limiting circuit arrangement |
08/14/1979 | US4164772 AC fault current limiting circuit |
08/08/1979 | EP0003396A1 Control circuit for energizing an electrically ignited load |
07/31/1979 | US4163190 Apparatus for control of electrical current by electromagnetic induction |
07/17/1979 | US4161772 Conversion and control of electrical energy by electromagnetic induction |
06/19/1979 | US4158864 Fault current limiter |
06/19/1979 | US4158383 Apparatus for coupling the components of a heat pump system |
05/29/1979 | US4156838 Active filter circuit for transient suppression |
05/29/1979 | US4156397 Power limiting arrangement in a sewing machine |
05/22/1979 | US4156274 Inverter circuit |
05/22/1979 | US4156264 High power protection apparatus |
05/02/1979 | EP0001722A2 Fast high voltage on-off switch with possibility of voltage regulation, load- and self- protection |
05/01/1979 | US4152743 Transient voltage suppression system |
05/01/1979 | US4152637 Saturable reactor limiter for current |
04/24/1979 | US4151460 High resistance ground fault detector and locator for polyphase electrical systems |
04/24/1979 | CA1053330A1 Overvoltage protection for an integrated circuit |
04/03/1979 | CA1051995A1 Intrinsic safety barrier |
03/27/1979 | US4146829 Battery dissipation limiter circuit |
03/13/1979 | CA1050614A1 Current-limiting devices |
03/13/1979 | CA1050613A1 Current limiting devices for alternating current systems |
01/16/1979 | CA1046577A1 Station protector with a three-electrode gas tube arrester |
12/26/1978 | US4131927 A.C. power supply circuit with surge current suppression |
12/05/1978 | CA1043840A1 Current limiting circuit breaker |
10/31/1978 | CA1041598A1 Fault-current limiter for high power electrical transmission systems |
10/24/1978 | US4122507 Loudspeaker overload circuit |
10/24/1978 | US4122385 Saturable reactor current limiter |
09/26/1978 | US4117524 Current-limiting devices |
09/26/1978 | US4117345 Marine ground isolator |
09/26/1978 | CA1039348A1 Two-path surge arrester |
09/05/1978 | US4112347 Conversion and control of electrical energy by electromagnetic induction |
08/29/1978 | US4110570 Surge protection device for repeater |
08/22/1978 | US4109288 Overload protection system |
08/15/1978 | US4107640 Current limiting element for preventing electrical overcurrent |
08/15/1978 | US4107584 Current limiting device for an a.c. motor |
08/15/1978 | CA1036658A1 Low voltage surge protection network |
07/25/1978 | US4103316 Apparatus for preventing the occurrence of possible transient phenomena in an electric power transmission circuit |
07/25/1978 | US4102347 Electronic pain control system |
07/11/1978 | US4100586 Tungsten lamp circuit for current limiting and fault indication |
07/04/1978 | US4099217 Protection circuits |
07/04/1978 | US4099216 Fuseless intrinsic safety barrier |
06/20/1978 | US4096541 Miniature lightning protector |
06/13/1978 | US4095163 Transient voltage suppression circuit |
06/06/1978 | US4093978 Method and apparatus for protecting electrical systems from lightning strike effects |
06/06/1978 | US4093968 Resistors with heat sink |
05/23/1978 | US4091434 Surge current protection circuit |
05/16/1978 | US4090227 Transient-protected signal distribution circuit |
05/09/1978 | US4089032 Plug-type transient surge suppressor |
04/25/1978 | US4086648 Protector module |
04/18/1978 | US4085299 Peak amplitude protection system for ribbon loudspeakers |
03/14/1978 | US4079440 Printed circuit board capable of being inserted and withdrawn on on-line status |
03/07/1978 | US4078200 Current limiting circuit arrangements |
02/28/1978 | US4076996 Power supplier for magnetron |
02/07/1978 | US4072998 Over-voltage protection device |
01/10/1978 | US4068282 Protective device for low current transmission circuits |
01/10/1978 | US4068281 Thermally responsive metal oxide varistor transient suppression circuit |
01/10/1978 | US4068279 Power monitor |
12/06/1977 | US4061928 Circuit arrangement for the protection of inputs of integrated MOS circuits |
11/29/1977 | US4060842 Combined mutual drainage reactor and grounding relay |
11/01/1977 | US4056840 Line protector for communications circuit |
10/18/1977 | US4054933 Saturating time-delay transformer for overcurrent protection |
10/18/1977 | US4054831 Power supply turn-on and turn-off transient elimination circuits |
10/11/1977 | US4053875 Static charge detector having fail-safe voltage surge protection means |
09/27/1977 | US4051545 Apparatus for overvoltage protection of a direct converter in the rotor circuit of an asynchronous machine |
09/27/1977 | US4051543 Over voltage protector using current monitoring |
09/20/1977 | US4050092 Multi-circuit protector |
09/13/1977 | US4048467 Apparatus for generating and regulating welding currents |
09/06/1977 | US4047235 Current limit and overcurrent cut off system |
08/30/1977 | US4045823 Current limiting devices for alternating current systems |
08/23/1977 | US4044287 Circuit for energizing the electromotor driving a blower |
08/09/1977 | US4041543 Field protector for synchronous machines |
08/09/1977 | US4041357 High voltage protection circuit |
08/02/1977 | US4040116 Power supply employing a short circuit detector |
07/19/1977 | US4037265 Arc preventing power supply system |
07/19/1977 | US4037139 Lightning arrester |
07/19/1977 | US4037138 Zero-phase sequence protective device for faults within armature of three-phase synchronous machine |
06/21/1977 | US4031559 Filter capacitor charging circuit |
06/21/1977 | US4031457 Saturable reactor current limiter |
06/07/1977 | US4028591 Relay contact protector |
05/10/1977 | US4023071 Transient and surge protection apparatus |
05/10/1977 | US4023070 Electrical circuit for audio services |
05/03/1977 | US4021760 EMP circuit board filter using MOV devices |
05/03/1977 | US4021759 EMP line filter using MOV devices |
04/26/1977 | US4020440 Conversion and control of electrical energy by electromagnetic induction |
04/05/1977 | US4016485 Arrangement for limiting dynamic overvoltages |
04/05/1977 | US4016458 Radio frequency distribution network standby power system with overvoltage protection |
03/29/1977 | US4015170 Method for overvoltage protection of HVDC transmission line systems |
03/29/1977 | US4015168 Current limiting device for an electrical network |
01/18/1977 | US4004193 Voltage surge arrester with capacitive grading and improved sparkover for fast impulses |
01/11/1977 | US4002950 Power transmission control system |
01/11/1977 | US4002947 Arcing stacked plate nonlinear resistor for voltage limiter applications such as series capacitor protection |
12/21/1976 | US3999155 Circuit interrupter including a current-limiting reactor |
12/07/1976 | US3996498 Current limiting circuit and method |