Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02H - Emergency protective circuit arrangements › H02H 3 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
Patents for H02H 3 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection (33,031)
10/1982
10/12/1982CA1133622A1 Method of and a protection relay for protecting electrical equipment
10/12/1982CA1133621A1 Inrush current restraint circuit for alternating power system switch
10/06/1982EP0061660A1 Ratio ground relays
10/06/1982EP0061649A1 Protective relay
10/06/1982EP0061644A1 Ratio ground relay
10/05/1982US4353103 Ground fault interrupter circuit
09/1982
09/29/1982EP0061364A1 Low voltage circuit breaker with adjustable hybrid triggering
09/28/1982US4352136 Impedance-measuring device for impedance protection
09/28/1982CA1132681A1 Temperature control system for electric surface heater
09/22/1982EP0060790A1 Circuit breakers sensitive to fault currents
09/21/1982US4351013 Circuit interrupter with multiple display and parameter entry means
09/21/1982US4351012 Circuit interrupter with digital trip unit and means to enter trip settings
09/21/1982US4351011 Directional wave detector apparatus
09/21/1982CA1132239A1 Ground fault apparatus and protection system
09/15/1982EP0059889A1 Method for the surveillance of conductor currents, and arrangement for carrying out said method
09/14/1982US4349878 Arrangement for detecting disturbances influencing the network frequency in electric power supply systems and use of such arrangement in an adaptive automatic frequency control system for an electric power supply system
09/14/1982US4349813 Blown fuse sensor
09/14/1982CA1131696A1 Devices adapted to detect variations in magnetic flux notably circuit breakers
09/08/1982EP0059416A1 Ground fault detecting device for use with a DC circuit
09/07/1982US4348708 Ground fault circuit interrupting device with improved coordination of electronic circuit operation
09/07/1982CA1131337A1 Circuit breaker having an electronic fault sensing and trip initiating unit
09/07/1982CA1131312A1 Voltage-unbalance detector for polyphase electrical systems
09/07/1982CA1131296A1 Ground fault circuit interrupter
09/01/1982EP0058960A1 Housing structure with leakage current detecting means
08/1982
08/31/1982US4347581 Input setting method for digital operational devices
08/31/1982US4347542 Ratio ground relay
08/31/1982US4347541 Circuit breaker
08/31/1982US4347540 Solid-state load protection system having ground fault sensing
08/24/1982US4346424 Electronic remote control D.C. power controller and circuit breaker
08/24/1982US4346420 Magnetoplasmadynamic switch
08/24/1982US4346307 Voltage-unbalance detector for polyphase electrical systems
08/24/1982CA1130437A1 Differential protection circuitry for electrical devices
08/24/1982CA1130436A1 Parallel ac electrical system with differential protection immune to high current through faults
08/24/1982CA1130423A1 Disconnect and overload bypass arrangement for a portable tool
08/24/1982CA1130383A1 Method and apparatus for monitoring poly-phase currents in poly-phase equipment
08/18/1982EP0057948A2 Method of protecting electric networks in case of oscillations by means of a blocking device, and blocking device for carrying out this method
08/17/1982US4345292 Minimum size, integral, A.C. overload current sensing, remote power controller
08/17/1982US4345289 Ground fault circuit interrupting device with improved thyristor triggering
08/11/1982EP0057498A1 Ground isolation monitoring apparatus having a protective circuit
08/10/1982US4344143 Digital type distance relay system
08/10/1982US4344100 Ground fault circuit breaker with ground fault trip indicator
08/10/1982CA1129488A1 Circuit for protecting electrical apparatuses from short circuit or overload faults
08/03/1982US4343027 Common suspension multi-line grounding protective relay
08/03/1982CA1129060A1 Circuit breaker having an electronic fault sensing and trip initiating unit
07/1982
07/27/1982US4342064 Static distance relays with improved polarizing signal
07/27/1982US4342062 Sequence network circuits for protective relaying applications
07/20/1982US4340920 Mine vehicle safety apparatus
07/20/1982CA1128186A1 Ground fault circuit interrupter utilizing a single transformer
07/13/1982US4339802 Digital protective relaying devices
07/13/1982CA1127747A1 Wireless emergency power interrupting system
07/07/1982EP0055498A1 Method and device for the distance-selective short-circuit watching of electric lines
07/06/1982US4338648 Gapless discharge counter for lightning arresters
07/06/1982US4338647 Circuit interrupter with digital trip unit and optically-coupled data input/output system
06/1982
06/30/1982EP0054958A2 Circuit arrangement for recording a fault current
06/29/1982US4337435 Digital phase sequence detector
06/29/1982CA1126847A1 Ground fault protection system for industrial power circuits
06/29/1982CA1126820A1 Circuit for monitoring the current distribution in parallel-connected converter branches
06/23/1982EP0054076A1 Discharging circuit for rectifying power source
06/22/1982CA1126383A1 Wireless emergency power interrupting system for multibranch circuits
06/16/1982EP0053760A1 Arrangement for detecting one or more faulty phases in a multiphase electric system
06/15/1982US4335437 Circuit interrupter with energy management functions
06/15/1982US4335414 Automatic reset current cut-off for an electrostatic precipitator power supply
06/15/1982US4335413 Circuit interrupter with remote indicator and power supply
06/15/1982US4335412 Triax safety circuit
06/15/1982US4335339 Electronic safety device
06/15/1982CA1125902A1 Solid state relay
06/15/1982CA1125901A1 Ground fault circuit interrupter with grounded neutral protection
06/09/1982EP0053229A1 Method and circuit for detecting and breaking disturbing electric arcs
06/02/1982EP0053069A1 Process for determining the direction of a fault origin, in an electric distribution system
06/01/1982US4333151 Method for protecting an electric power system and digital protective system
06/01/1982US4333122 Minimum size, integral, A.C. overload current sensing, remote power controller
06/01/1982US4333050 Multiphase voltage monitor
06/01/1982CA1124825A1 Current limiting device for an electric power system
05/1982
05/25/1982US4331999 Circuit interrupter with digital trip unit and power supply
05/25/1982US4331998 Circuit interrupter with digital trip unit and style designator circuit
05/25/1982US4331997 Circuit interrupter with digital trip unit and potentiometers for parameter entry
05/25/1982US4331996 Time delayed undervoltage relay
05/25/1982US4331995 Phase unbalance protector
05/25/1982US4331994 Shootthrough fault protection system for a voltage source transistor inverter
05/25/1982US4331884 Two-pole overcurrent protection device
05/25/1982US4331882 Method and means for detecting spurious electrical signals in an electrical power system
05/18/1982US4330808 Automatic control for processing signals from an overheat monitor of a dynamoelectric machine
05/18/1982US4330050 Portable article carrying case
05/18/1982CA1123942A1 Multipole ground fault circuit interrupter with trip level adjustment
05/18/1982CA1123941A1 People protecting ground fault circuit breaker utilizing waveform characteristics
05/11/1982US4329730 D.C. Switch circuit
05/11/1982US4329727 Directional power distance relay
05/11/1982US4329668 Leakage current circuit breaker responsive to direct-current leakage currents of both polarities
05/11/1982US4329653 Circuit arrangement for storing the phase of an a-c voltage
05/04/1982US4328551 Apparatus and method for protection of electric power transmission lines and the like
05/04/1982US4328459 Current inrush limiting apparatus
05/04/1982CA1123055A1 Method and apparatus for monitoring line voltage in a polyphase source
04/1982
04/27/1982US4327422 Power source device for bubble memory unit
04/27/1982US4327397 Computer power/temperature protector
04/27/1982US4327392 Protective apparatus for use with power lines
04/27/1982US4327391 Motor protection circuit
04/27/1982CA1122689A1 Dual voltage ground fault protector
04/27/1982CA1122655A1 Directional relaying technique
04/20/1982US4326230 Circuit for monitoring the voltage stress of a capacitor
04/13/1982US4325098 Detection of the position of a fault on an electric link
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