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Browse by Category: Main > Electrical & Energy
Class Information
Number: 361/97
Name: Electricity: electrical systems and devices > Safety and protection of systems and devices > With specific current responsive fault sensor > With time delay protective means > With multiple timing characteristics
Description: Subject matter wherein the protective means is activated after a short, long, intermediate, etc., time delay depending on the magnitude of the fault sensed.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8605393 Compressor protection and grid fault detection device Dec. 10, 2013
8514540 Smart plug with internal condition-based demand response capability Aug. 20, 2013
8385038 Circuit breaker switching control system Feb. 26, 2013
8244489 Parametric multi-cycle averaging in an intelligent electronic device Aug. 14, 2012
8237309 Arrangement having parallel-connected DC power supply units Aug. 7, 2012
8143858 Electrical apparatus, electrical apparatus system, and power supply apparatus Mar. 27, 2012
8134253 Load driving circuit, integrated circuit, DC-DC converter, and load driving method Mar. 13, 2012
8054605 Power supply controller Nov. 8, 2011
8018703 Auxiliary device and data transmission method, auxiliary unit and electrical circuit breaker comprising said device Sep. 13, 2011
7961485 Method of forming a PWM controller and structure therefor Jun. 14, 2011
7920976 Averaging in an intelligent electronic device Apr. 5, 2011
7746615 Adaptive multi-level threshold system and method for power converter protection Jun. 29, 2010
7663457 Magnetic latch for a voice coil actuator Feb. 16, 2010
7538519 Information handling system with battery protected from non-permanent failures May. 26, 2009
7218496 Overcurrent protection circuit May. 15, 2007
7170732 Surge delay for current limiter Jan. 30, 2007
6985784 Configuring a centrally controlled circuit breaker protection system Jan. 10, 2006
6798630 Trip device comprising an improved man-machine interface and circuit breaker comprising such a trip device Sep. 28, 2004
6788513 Switching power supply circuit Sep. 7, 2004
6788514 Method and apparatus for fault condition protection of a switched mode power supply Sep. 7, 2004
6683766 DC arc detection and prevention circuit and method Jan. 27, 2004
6633474 Selective electronic tripping element Oct. 14, 2003
6625551 Fault current and differential current detection system capable of preventing spurious triggering of a protection system due to transient interference pulses Sep. 23, 2003
6580593 Method and apparatus for fault condition protection of a switched mode power supply Jun. 17, 2003
6385022 Method and apparatus for deriving power system data from configurable source points May. 7, 2002
6324041 Protection circuit for traveling wave tubes having multiple input tones Nov. 27, 2001
6297939 Zone selective interlock for a circuit breaker system Oct. 2, 2001
6279115 Circuit arrangement for monitoring of an electric tripping device for low-voltage switches Aug. 21, 2001
6195243 Method and apparatus for adaptive configuration and control in a network of electronic circuit breakers Feb. 27, 2001
6175479 Instantaneous protection device and method for a circuit breaker Jan. 16, 2001
6141197 Smart residential circuit breaker Oct. 31, 2000
6069780 Electronic trip device comprising, in series, finite and infinite impulse response filters May. 30, 2000
6067218 Electronic trip device comprising at least one setting device May. 23, 2000
6018300 Fault monitoring Jan. 25, 2000
5995347 Method and apparatus for multi-function electronic motor protection Nov. 30, 1999
5943201 Method and apparatus for setting trip profiles in electrical switches using a portable unit with a non-volatile memory Aug. 24, 1999
5808844 Current differential protection arrangement Sep. 15, 1998
5793595 Multi-application relay for power systems Aug. 11, 1998
5764460 Circuit for the protection against overcurrents in power electronic devices and corresponding method Jun. 9, 1998
5710690 Method and apparatus for protecting an integrated circuit from current overload Jan. 20, 1998
5657193 Electronic control module for motor controller units Aug. 12, 1997
5648887 Electric current limiting device for winch responsive to multiple device states Jul. 15, 1997
5627718 Apparatus providing protection and metering in an ac electrical system utilizing a multi-function sampling technique May. 6, 1997
5627717 Electronic processing unit, and circuit breaker including such a unit May. 6, 1997
5627713 Protective device for electric distribution system May. 6, 1997
5596473 Electrical switches with current protection interfaced with a remote station and a portable local unit Jan. 21, 1997
5500781 Digital circuit interrupter with multiple accessory function Mar. 19, 1996
5485343 Digital circuit interrupter with battery back-up facility Jan. 16, 1996
5483408 Overcurrent trip unit with separately adjustable neutral protection Jan. 9, 1996
5452174 Power source circuit incorporating a protection device therein and a printer device employing the same Sep. 19, 1995

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