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