Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02H - Emergency protective circuit arrangements › H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
Patents for H02H 9 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection (21,232)
10/1981
10/13/1981CA1110693A1 High voltage transient protection unit
10/07/1981EP0037222A1 Line protector for a communications circuit
10/06/1981CA1110323A1 Series capacitor protection equipment with extended range dual sparkover feature
09/1981
09/22/1981US4291265 Protective system for inverter circuit used in driving AC motors
09/16/1981EP0035808A1 Current-measuring arrangement with overload protection
09/08/1981US4288833 Lightning arrestor
09/08/1981US4288830 Overvoltage protector
08/1981
08/26/1981EP0034288A1 Circuit arrangement for usurping excessive voltages
08/11/1981CA1106912A1 Lightning arrester device for power transmission line
08/05/1981EP0033190A1 Overcurrent protection devices
08/04/1981US4282555 Overvoltage protection means for protecting low power semiconductor components
07/1981
07/15/1981EP0032085A1 Multipolar protecting device against overvoltages
07/08/1981EP0031594A2 High voltage direct current transmission installation
06/1981
06/30/1981CA1104249A1 High voltage protection circuit
06/16/1981US4273051 Electric device
06/10/1981EP0029876A1 Filter arrangement for attenuating short interference waves
06/09/1981US4272750 Power breaker apparatus
06/02/1981US4271460 Soft turn-on power
06/02/1981US4271448 Electronic protection circuit for solid state switches energizing AC loads
06/02/1981US4271446 Transient voltage suppression system
06/02/1981US4271445 Solid-state protector circuitry using gated diode switch
05/1981
05/26/1981US4270160 Lightning resistive device in aerial power transmission system
05/12/1981CA1101052A1 Arcing stacked plate nonlinear resistor for voltage limiter applications such as series capacitor protection
04/1981
04/28/1981US4264940 Shielded conductor cable system
04/21/1981US4263635 Method and apparatus for sensing the clearance of fault current on an ac transmission line
04/15/1981EP0026861A1 Arrangement for protection against overvoltage
04/14/1981US4262317 Line protector for a communications circuit
04/02/1981WO1981000934A1 Protector device for telecommunications circuits
04/01/1981EP0025853A1 Circuit arrangement for excess-voltage protection
03/1981
03/31/1981US4259705 Combination surge suppressor filter
03/31/1981US4259704 Protective circuit for zinc oxide varistors
03/24/1981US4258407 Lightning arrester device for power transmission line
03/24/1981US4258309 Switching type power supply circuit
03/17/1981US4257080 Current limiting devices
03/11/1981EP0024585A2 Double insulated network connection with surge arresters
03/05/1981WO1981000648A1 Current damping arrangements
03/03/1981US4254442 Circuit for the protection of telephone lines
02/1981
02/24/1981US4253131 Repeater overload circuit
02/10/1981CA1095583A1 Electrical overvoltage surge arrester with varistor heat transfer and sinking means
02/10/1981CA1095582A1 Overvoltage surge arrester having laterally biased internal components
02/03/1981US4249224 Surge voltage arrester with fail-safe feature
01/1981
01/20/1981USRE30490 Triggering circuit for spark gap assemblies
01/20/1981US4246621 Energizing circuit for solenoid valve
01/13/1981US4245270 Circuit card with soft power switch
01/07/1981EP0021472A1 Power line transient limiter
12/1980
12/23/1980US4241243 Power regulator for use with line signal repeaters which are remotely powered
12/16/1980US4240123 Power breaker system
12/09/1980US4238812 Circuit protection devices comprising PTC elements
11/1980
11/25/1980US4236200 Semiconductor circuit having a series-connected reactor
11/25/1980US4236188 Coaxial terminal protection device with disposable cartridge
11/25/1980CA1090399A1 Line fault protector module having a fusible element controlling a grounding circuit
11/12/1980EP0018598A1 Circuit for limiting the switching current in a series circuit consisting of a current transformer, a semi-conductor device, a protection inductance and an overload-sensitive cut-out
11/11/1980US4233641 Line protector for a communications circuit
11/11/1980US4233557 Switching power supply
11/04/1980CA1089013A1 Dissipation limiter circuit
11/04/1980CA1089005A1 Circuit for the protection of telephone lines
10/1980
10/29/1980EP0018067A1 Line protector for a communications circuit
10/15/1980EP0017343A1 Radio frequency generators
10/15/1980EP0017337A1 Line protector for a communications circuit
10/15/1980EP0017324A1 Surge voltage arrester with fail-safe feature
10/15/1980EP0016850A1 Surge voltage diverter to protect several conductors simultaneously
10/14/1980US4228478 Overvoltage arrester
09/1980
09/09/1980CA1085450A1 Voltage surge protector
09/03/1980EP0014914A1 Choke coil for limiting short circuit currents
09/02/1980US4220935 Current limiting circuit breaker with high speed magnetic trip device
09/02/1980US4220868 Method of and system for controllably connecting load to generator
08/1980
08/19/1980US4218647 Voltage regulator with current limiting circuitry
08/12/1980US4217618 Thyristor firing circuit module with integral optical isolation, dv/dt limitation, and bidirectional voltage transient suppression
08/12/1980CA1083667A1 Two terminal circuitry for voltage limitation
08/05/1980US4216456 Current limiting apparatus
07/1980
07/22/1980US4214211 Electrostatic destruction preventing circuit for use in a receiver
07/15/1980US4213166 High voltage protection circuit
07/15/1980US4213164 Electronic protection circuit incorporating voltage divider sensing, gating and triggering
07/01/1980US4210906 Transient suppression and detection system with operational indicator means
06/1980
06/17/1980US4208708 Current limiting arrangement for DC electrical apparatus
06/17/1980US4208694 Line protector
06/10/1980CA1079347A1 Saturating time-delay transformer for overcurrent protection
05/1980
05/14/1980EP0010980A1 Overcurrent protection circuitry for an electric motor driving circuit
05/14/1980EP0010979A1 AC electric motor driving circuit having overload protection circuitry
04/1980
04/29/1980US4200898 Current limiter
04/16/1980EP0009811A1 Line amplifier with a circuit for the coarse protection of input and output against overvoltage
04/08/1980CA1075306A1 Protector apparatus for telecommunications lines
04/08/1980CA1075305A1 Protector for telecommunication lines
03/1980
03/04/1980US4191986 Power line transient suppressors
02/1980
02/06/1980EP0007617A1 Disconnect and overload bypass arrangement for a portable tool
02/05/1980US4187524 Series capacitor protection equpment with extended range dual sparkover feature
01/1980
01/29/1980US4186418 Overvoltage protected integrated circuit network, to control current flow through resistive or inductive loads
01/15/1980US4184186 Current limiting device for an electric power system
01/01/1980US4181921 Harmonic distortion attenuator
12/1979
12/25/1979US4180843 Device for protecting electric systems, particularly telecommunication systems, against overvoltage pulses
12/25/1979CA1068781A Starting surge current protection circuit
12/25/1979CA1068775A Electrical overvoltage surge arrester with a long time constant valve section and series gap section
12/11/1979US4178619 Protective integrated circuit network, particularly for connection to an inductive load
12/11/1979CA1067953A1 Line protector for communication circuit
11/1979
11/20/1979US4175277 Voltage surge protector
11/20/1979US4175276 Transformer inrush current detector
11/13/1979US4174529 Protective circuit for zinc oxide varistors
11/13/1979US4174495 Static current limiting switch with soft forced commutation
10/1979
10/23/1979US4172269 Circuit for overshoot supression in X-ray generators
10/03/1979EP0004351A1 Lightning arrester device
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