With Communication Between Disconnect Points Patents (Class 361/68)
  • Patent number: 10333611
    Abstract: A first radio relay device (21) transmits a first radio frame in which a first pulse has been set, a second radio relay device (22) sends back a second radio frame in which a second pulse has been set according to detection of the first pulse from the received first radio frame, the first radio relay device (21) detects the second pulse from the received second radio frame, and either one of the relay devices adjusts a correction value included in the time synchronization packet using a transmission delay time between the two radio relay devices calculated based on at least the setting of the first pulse and the detection of the second pulse.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: June 25, 2019
    Assignee: NEC CORPORATION
    Inventors: Makoto Otsu, Shuhei Munetsugu
  • Patent number: 9595826
    Abstract: A protection element for a meshed energy supply network of a means of transport, in particular of an aircraft, a meshed energy supply network having such protection elements, a method for protecting such a meshed energy supply network and a computer program for executing the method. The protection element comprises a control unit, which is formed to deduce a trigger time value from a detected fault impedance value of a network error that has occurred in the energy supply network and to adapt the trigger time value in the event of a subsequent change in the fault impedance value of the network error, and a separation unit for interrupting a connection between the protection element and the network error depending on the trigger time value.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: March 14, 2017
    Assignee: Airbus Operations GmbH
    Inventors: Johannes Brombach, Arno Luecken, Detlef Schulz
  • Patent number: 9306384
    Abstract: There is a method of fault clearance for a DC power grid (10), wherein the DC power grid (10) includes: a plurality of DC terminals (12a,12b,12c,12d); a plurality of DC power transmission media (14a,14b, 14c,14d) to interconnect the plurality of DC terminals (12a, 12b, 12c, 12d); and a plurality of DC circuit interruption device stations (18), each DC circuit interruption device station (18) being associated with a respective one of the plurality of DC power transmission media (14a,14b, 14c, 14d) and a respective one of the plurality of DC terminals (12a, 12b,12c, 12d), each DC circuit interruption device station (18) including a DC circuit interruption device (20) to selectively interrupt current flow in the associated DC power transmission medium (14a, 14b, 14c, 14d), the method comprising the steps of: (i) detecting one or more faults occurring in the plurality of DC power transmission media (14a, 14b, 14c,14d); (ii) after detecting the or each fault, opening all of the DC circuit interruption devices (20)
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: April 5, 2016
    Assignee: General Electric Technology GmbH
    Inventors: Robert Whitehouse, Carl David Barker
  • Patent number: 9279846
    Abstract: A power supply line is divided into a plurality of sections by switching devices each having an associated measurement device that detects a current signal at a measurement point at the respective switching device. The current signal is sampled to form current sample values, and a current measurement variable is determined. Each measurement device forms a delta current value (difference between an instantaneous current and a prior measurement), compares the delta current value with a current threshold value and identifies a jump in current when the delta current value overshoots the threshold. The measurement device, upon identifying a current jump, sends a status message indicating the jump. A fault location device identifies a fault on that section of the power supply line delimited by a switching device that has identified a jump and one that has not identified a jump in current.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: March 8, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Norbert Schuster, Markus Spangler
  • Patent number: 9172525
    Abstract: Embodiments of the present disclosure relate to a method and a device for compensating for a time path. In the embodiments of the present disclosure, on the basis of not changing implemented 1588 synchronization architecture, a compensation unit is added on a service board unit, the compensation unit calculates a compensation time value for asymmetrical reception and transmission of fiber links and transfers the compensation time value into the service board unit, and the service board unit implements automatic compensation according to a port status. The method and the device for compensating for a time path according to the embodiments of the present disclosure may implement automatic compensation for receiving and sending fiber links without manually testing the asymmetry of links node by node, so that the embodiments of the present disclosure can be widely applied in time synchronization networks.
    Type: Grant
    Filed: March 19, 2013
    Date of Patent: October 27, 2015
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Dezhong Cao, Buyun Wang, Guojie Pan, Chao Su
  • Patent number: 9057744
    Abstract: According to one embodiment, a protective relaying device includes a phase difference calculating unit configured to calculate a phase difference between a phase obtained by shifting a phase of first current data by 180°, and a phase of second current data, a setting unit configured to calculate a target value of elimination of a sampling synchronization error caused by a difference between a transmission delay time of up-transmission, and a transmission delay time of down-transmission on the basis of the phase difference, and to set the calculated target value, and a sampling synchronization control unit configured to carry out control of sampling synchronization such that a difference between a time TM and a time TF.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: June 16, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Atsushi Takeuchi
  • Publication number: 20150116877
    Abstract: Power distribution systems and methods are described. In one example, a method of testing a power distribution zone select interlocking system including a first circuit protection device and a second circuit protection device coupled to the first circuit protection device downstream of the first circuit protection device is described. The method includes receiving, by the second circuit protection device, an input instructing the second circuit protection device to test communication between the first circuit protection device and the second circuit protection device, and outputting, by the second circuit protection device, a blocking signal in response to the input. The first circuit protection display an indication of reception of the blocking signal to confirm proper interconnection of the zone select interlocking signals.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: General Electric Company
    Inventors: Arun Kumar Singh, Gary Vincent Hanrahan, Scott Jeffrey Hall
  • Patent number: 8791730
    Abstract: A synchronization method for current differential protection comprises: selecting a point on the transmission line protected by the current differential protection; measuring the current and the voltage of each of the terminals of said transmission line; calculating the compensating voltage at the selected point respectively according to the measured current and the voltage of the each terminal; detecting and calculating the synchronization error by comparing all the compensating voltages.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: July 29, 2014
    Assignee: ABB Research Ltd.
    Inventors: Youyi Li, Bin Su, Ying Yang, Torbjorn Einarsson, Zoran Gajic
  • Patent number: 8462475
    Abstract: A multi-terminal power line protective relay system is provided, which divides a power transmission line having four or more terminals into two or more power line sections composed of three adjacent terminals and portions of the power transmission line lying among the three adjacent terminals and one of the three adjacent terminals being shared by two adjacent power line sections, and includes protective relays at the respective terminals including a current-driven differential protective relay element for detecting a fault occurring in a power line section through current-differential calculation by using measured currents, inter-terminal communication channels linking two protective relays at two different terminals; and intra-terminal communication channels linking two protective relays at each shared terminal.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: June 11, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Chikashi Komatsu, Mitsuyasu Kido, Hideyuki Yoshioka, Tokushiro Uno
  • Patent number: 8271214
    Abstract: A differential protection system has a differential protection device at each end of a line section of an electrical power transmission line, such that it can selectively identify and safely disconnect even high-impedance faults on the monitored line section.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: September 18, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventor: Tevfik Sezi
  • Patent number: 8180481
    Abstract: A system and method for operating an autoloop system on an electrical distribution system is provided. The system includes a first branch circuit having a first recloser and a midpoint recloser and a second branch circuit having a second feeder recloser and a midpoint recloser. A tie recloser is electrically coupled between the first branch circuit and the second branch circuit wherein the tie recloser closes only after a fault is detected. A master controller associated with the first and second branch circuits communicates with the reclosers of the first and second branch circuits. The master controller includes a processor for blocking a fast tripping function of a feeder recloser in response to the detection of a fault on the other branch circuit. The portion of a circuit where a fault is detected may be isolated to minimize the portion of the first and second branch circuits without power.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: May 15, 2012
    Assignee: Consolidated Edison Company of New York, Inc.
    Inventors: Paul V. Stergiou, William J. Harris
  • Patent number: 8107205
    Abstract: An output unit outputs a trip current based on current amount data obtained by sampling a current amount at a first end of a power line at a predetermined timing and current amount data received from a device at a second end of the power line. A clock generating unit generates a clock to be used as a reference for the predetermined timing. A receiving unit receives a GPS signal and extracts a time synchronization signal from the GPS signal. A correction-signal generating unit generates a correction signal for synchronizing the clock with the time synchronization signal. A correcting unit corrects the clock with the correction signal.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: January 31, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventor: Keigo Adachi
  • Patent number: 7885043
    Abstract: The present invention provides a remote operable over-current protection apparatus. The apparatus includes control circuitry integrally arranged on a current path and a micro electromechanical system (MEMS) switch disposed on the current path, the MEMS switch responsive to the control circuitry to facilitate the interruption of an electrical current passing through the current path. The apparatus further includes a communication connection in signal connection with the control circuitry such that the control circuitry is responsive to a control signal on the communication connection to control a state of the MEMS switch.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: February 8, 2011
    Assignee: General Electric Company
    Inventors: Brent Charles Kumfer, William James Premerlani, Robert Joseph Caggiano, Kanakasabapathi Subramanian, Christopher Fred Keimel, Charles Stephan Pitzen, David James Lesslie, Parag Thakre
  • Patent number: 7872447
    Abstract: In an electrical storage apparatus including an electric storage device connected between a main power supply and a load, a first bypass FET and a bypass diode which are connected in series between the main power supply and the load are provided, and first and second main path FETs connected in series between the electric storage device and the load are provided. A controller judges that the first bypass FET suffers an open-circuit failure if the voltage (Va) of the load is equal to or smaller than the first threshold value Vth1 or if the voltage (Vc) at the connection point between the first bypass FET and the bypass diode is equal to or smaller than the second threshold value Vth2, when the first bypass FET is turned on and the first main path FET and the second main path FET are turned off.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: January 18, 2011
    Assignee: Panasonic Corporation
    Inventors: Kazuki Morita, Hideaki Hamai, Yohsuke Mitani
  • Patent number: 7860615
    Abstract: A methodology and related system apparatus is provided to most efficiently and flexibly respond to abnormalities to reconfigure and restore service to end customers in commodity distribution systems to enhance circuit reconfiguration in an electrical power distribution system. Methodology is also provided to appropriately allocate system resources of the distribution system to prevent the potential overloading of electrical power sources. In one illustrative arrangement, the methodology is characterized by resources at each node and communications of source allocation data or messages to other nodes to request and establish an appropriate allocation of system resources.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: December 28, 2010
    Assignee: S&C Electric Company
    Inventors: William Christian Tracy Nelson, Kenneth James Biallas, Eddie W. Brasher, Thomas Chapman Fix
  • Patent number: 7725295
    Abstract: A cable fault detection component (168) receives input data indicative of a fault in an electrical power system. The component (168) analyzes the input data to determine if the fault is indicative of a temporary or self-clearing cable fault and generates corresponding output data (276). In one implementation, the cable fault detection component (168) is implemented as a software module which operates on a computer (105) of a substation intelligence system (104).
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: May 25, 2010
    Assignee: ABB Research Ltd.
    Inventors: James Stoupis, Ajay C. Madwesh, David Lubkeman, Mirrasoul Mousavi
  • Patent number: 7696647
    Abstract: A coupling node for regulating the current flow between two or more drives is described. The coupling node may include an interconnect circuit in communication with the drives for selectively opening the connection between the drives. A sensor circuit in communication with the drives measures one or more electrical properties of the drives or between the drives. A sensor circuit actuates the interconnect circuit in response to the measured electrical property of the two or more drives meeting predetermined criteria. In operation, when an electrical property of the drives, such as the current flowing between the drives, meets a predetermined criteria, such as an short circuit or current overload, as indicated by the sensor circuit, the controller actuates the interconnect circuit to open the connection between the drives.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: April 13, 2010
    Assignee: Toshiba International Corp.
    Inventors: Mark D Rayner, Rajesh Gopinath, Rahul Khopkar
  • Patent number: 7599161
    Abstract: A method of operating a relay device, in an electrical circuit comprising first and second main circuit breakers, and a bus tie circuit breaker connecting the first and second main circuit breakers, the method comprising computing a first positive sequence current phasor for the first main circuit breaker and a second positive sequence current phasor for the second main circuit breaker computing a first positive sequence voltage phasor for the first main circuit breaker and a second positive sequence voltage phasor for the second main circuit breaker; computing a correction of the first positive sequence voltage and second positive sequence voltage to a line-to-neutral phase angle reference if there is any rotation in a potential transformer connection; determining a fault has occurred when a magnitude of a current through at least one of the first main circuit breaker or the second main circuit breaker exceeds a predetermined threshold; determining a phase angle difference by comparing the phase angle of the
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: October 6, 2009
    Assignee: General Electric Company
    Inventors: William Premerlani, Marcelo Valdes, Thomas Frederick Papallo, Jr., Gregory P. Lavoie, Radoslaw Narel
  • Patent number: 7542256
    Abstract: A method of operating a relay device, the method comprising the steps of: providing main circuit-breakers and a bus-tie-breaker connecting the main-circuit-breakers; defining a partial-differential-zone comprising a main circuit breaker and the bus-tie breaker; assigning a first value to the direction of the fault current flowing into the partial differential zone;—assigning a second value to the direction of the fault currents flowing out of the partial-differential-zone, wherein the first value is not equal to the second value;—comparing the values assigned to the fault currents; determining if the fault currents are flowing into the partial differential zone; and determining if at least two of the fault-currents is flowing in a different direction with respect to the partial-differential-zone wherein one of the fault currents is flowing into the partial-differential-zone and one of the fault currents is flowing out of the partial differential zone.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: June 2, 2009
    Assignee: General Electric Company
    Inventors: William Premerlani, Marcelo Valdes, Thomas Frederick Papallo, Jr., Radoslaw Narel, Gregory P. Lavoie
  • Patent number: 7154722
    Abstract: The invention contemplates a technique for providing loop control on a faulted overhead or underground loop system, while preventing restored current from being fed or back fed into the fault. In particular, the invention provides a method, device, and system for restoring power to a faulted loop distribution system. The inventive method includes detecting a fault on the loop distribution system, interrupting current on the faulted part of the loop distribution system, isolating the faulted part of the loop distribution system from an unfaulted part of the loop distribution system, restoring current to the unfaulted part of the loop distribution system, and preventing the current from flowing to the faulted part of the loop distribution system. The method may further include providing the current to a load.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: December 26, 2006
    Assignee: ABB Technology AG
    Inventors: James D. Stoupis, Marina V. Graham, Gregory J. Grote
  • Patent number: 7126800
    Abstract: A method for compensating for communications channel delay asymmetry in a current differential protection system includes determining an apparent sampling clock offset for a communications channel, the apparent sampling clock offset between a first sampling clock and a second sampling clock configured within the current differential protection system. An apparent global positioning system (GPS) clock offset is determined for the communications channel, the apparent GPS clock offset between a plurality of GPS time stamps corresponding to the first and said second sampling clocks. A compensated clock offset is determined by subtracting the apparent GPS clock offset from the apparent sampling clock offset so as to cancel out a channel asymmetry component of deviation in the apparent GPS and sampling clock off-sets.
    Type: Grant
    Filed: September 10, 2003
    Date of Patent: October 24, 2006
    Assignee: General Electric Company
    Inventors: William J Premerlani, Bogdan Kasztenny, Ilia Voloh
  • Patent number: 7119459
    Abstract: A switching circuit includes a microchip which, in response to a signal from a signal switch, controls the operation of a power switch which, when closed, connects a load to a battery. The microchip can monitor the status of the battery and control the power switch to ensure optimum operation of the load and optimum usage of the energy in the battery. The microchip can control the connection of the load to the battery in different ways according to the manner of operation of the signal switch.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: October 10, 2006
    Assignee: Azoteq (PTY) LTD
    Inventors: Frederick Johannes Bruwer, Brandt Aucamp, Abraham Carl Greyling
  • Patent number: 6937134
    Abstract: In order to receive protection commands in a remote tripping device, one or more signals is or are received, protection commands and combinations of protection commands are coded by means of an individual signal or by means of a predetermined combination of signals, and each protection command is allocated a predetermined minimum safety and/or security value.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: August 30, 2005
    Assignee: ABB Schweiz AG
    Inventor: Michael Strittmatter
  • Patent number: 6701221
    Abstract: A method and apparatus are disclosed for preventing damage to an alternator of a genset resulting from high currents within the alternator. The method includes calculating, at a processor, a first quantity related to a current flowing through the alternator during a first time period, and comparing, at the processor, the first quantity with a first threshold. The method further includes calculating, at the processor, a second quantity related to the current flowing through the alternator during at least one of the first time period and a second time period, and comparing, at the processor, the second quantity with a second threshold. The method additionally includes indicating a current overload condition if at least one of the first quantity exceeds the first threshold or the second quantity exceeds the second threshold.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: March 2, 2004
    Assignee: Kohler Co.
    Inventors: Zane C. Eaton, Vikram Kaura, Richard D. Van Maaren, Douglas W. Dorn
  • Patent number: 6678134
    Abstract: A digital protective relay system is capable of making sampling timing the same among plural protective relay device which operate independent from each other by using a signal from a GPS satellite. The sampling timing is made the same regardless of the time lag from which it is sent downstream with the concomitant transmission delay time in the case of data communications, or regardless of the time lag from which it is sent upstream.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: January 13, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideaki Sugiura, Itsuo Shuto, Hachidai Ito, Masamichi Saga
  • Patent number: 6650031
    Abstract: The invention relates to a system for protecting a solar module against theft or unauthorized use by an authorized consumer. Said system comprises an interruption device on the solar module side and a release device on the consumer side. The interruption device transmits a first signal to the release device via a power line and interrupts the transfer, via a power line, of energy generated by the solar module to the consumer if the interruption device does not receive, via said power line, a second signal from the release device within a specified first period. This permits the secure and economical protection of the solar module, since a solar module protected in the manner described above is of no value without the second signal.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: November 18, 2003
    Assignee: Siemens and Shell Solar GmbH
    Inventor: Daniel Goldack
  • Patent number: 6628496
    Abstract: The digital protection system for a high voltage electricity network to instruct circuit breakers to open in the event of faults being detected by current and/or voltage sensors on the network lines connected to the circuit breakers includes a radio link for transmitting data with a mobile telephone of the “Bluetooth” type.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: September 30, 2003
    Assignee: Alstom
    Inventor: Dominique Montjean
  • Publication number: 20030011950
    Abstract: The invention relates to a protective device for an electric consumer. A residual-current circuit-breaker is located in an electrical supply line between a mains connection and a switch device of the consumer. Said residual-current circuit-breaker has a detection device for recognizing a residual current and a first interrupter for interrupting the supply of electricity from the mains connection to the switch device in accordance with a switching signal from a detection device. If an electrical energy storage device is provided in the switching device, a second interrupter is provided, this second interrupter being controlled by the residual-current circuit-breaker.
    Type: Application
    Filed: July 22, 2002
    Publication date: January 16, 2003
    Inventor: Michael Steffen
  • Patent number: 6469629
    Abstract: A protective relay, system, and relay operation method which allows logic functions to be distributed amongst multiple protective relays associated with a power distribution system. The protective relays include communications ports for exchanging messages over a peer-to-peer communications network, and include programmable logic. Each protective relay receives logic operands contained in the messages from remote protective relays, executes logic equations using the received operands, provides protective control if needed, and outputs operands to other protective relays.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: October 22, 2002
    Assignee: General Electric Company
    Inventors: Colin Bruce Campbell, Roger Moore, Andrew W. Baigent
  • Patent number: 6459998
    Abstract: In systems embodying the invention, a “downed” power line is detected by sensing whether there is an open circuit along the power line and producing an indication that an open circuit condition exists. In response to an indication that an open circuit condition exists, the system compares the nature of the voltage and/or current signals present on the power line at the time an open circuit condition is indicated to exist, with a preprogrammed stored condition which includes typical signals to be expected when a “break” occurs along a power line. When a downed power line is detected, power is then removed from the affected line.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: October 1, 2002
    Inventor: Gary R. Hoffman
  • Publication number: 20020089233
    Abstract: The invention provides a power supply device which can provide a sufficiently long ending process time to an electronic equipment connected thereto even if an input voltage is disconnected abnormally and reduces the circuit area and the power consumption. The power supply device includes a switching power supply section for receiving a DC voltage as an input voltage at a primary side thereof, switching the inputted DC voltage and generating a stabilized output DC voltage at a secondary side thereof isolated from the primary side, a current detection section for generating a synchronization pulse synchronized with supply current to the switching power supply section, and a control section for outputting a detection pulse to convey disconnection of an AC input to the switching power supply section to the electronic equipment side based on the synchronization pulse.
    Type: Application
    Filed: October 30, 2001
    Publication date: July 11, 2002
    Inventor: Toshiya Nakamura
  • Publication number: 20020057544
    Abstract: A digital protective relay system is capable of making sampling timing the same among plural protective relay device which operate independent from each other by using a signal from a GPS satellite. The sampling timing is made the same regardless of the time lag from which it is sent downstream with the concomitant transmission delay time in the case of data communications, or regardless of the time lag from which it is sent upstream.
    Type: Application
    Filed: October 5, 2001
    Publication date: May 16, 2002
    Inventors: Hideaki Sugiura, Itsuo Shuto, Hachidai Ito, Masamichi Saga
  • Patent number: 6356422
    Abstract: A circuit breaker system 10 (FIG. 1) using electronic trip units 35 is disclosed. The electronic trip units 35 are coupled to a communications bus 30 whereby the electronic trip units 35 can be reconfigured, controlled, and/or monitored by a central computer 20. Further, the electronic trip units are coupled to a separate control power supply line 50 and to a zone selective interlock system.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: March 12, 2002
    Assignee: Siemens Energy & Automation, Inc.
    Inventors: Mario Bilac, Paul J. Terricciano, William Petrosky, Charles Randall Dollar, II, Mikhail B. Golod, Euclid Batista
  • Patent number: 6347027
    Abstract: Method and apparatus for controlling an electric power distribution system including the use and coordination of information conveyed over communications to dynamically modify the protection characteristics of distribution devices (including but not limited to substation breakers, reclosing substation breakers, and line reclosers). In this way, overall protection and reconfigurability of the distribution system or “team” is greatly enhanced. According to additional aspects of the invention, devices within the system recognize the existence of cooperating devices outside of the team's domain of direct control, managing information from these devices such that more intelligent local decision making and inter-team coordination can be performed. This information may include logical status indications, control requests, analog values or other data.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: February 12, 2002
    Assignee: EnergyLine Systems, Inc.
    Inventors: William Christian Tracy Nelson, Donald S. Berkowitz, Witold Bik, Michael A. Maloney
  • Patent number: 6297939
    Abstract: A circuit breaker system 10 using electronic trip units 35. The electronic trip units 35 are coupled to a communications bus 30 whereby the electronic trip units 35 can be reconfigured, controlled, and/or monitored by a central computer 20. Further, the electronic trip units are coupled to a separate control power supply line 50 and to a zone selective interlock system 70 . The zone selective interlock system 70 is configured to provide tripping delays to circuit breakers located upstream from a detected fault.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: October 2, 2001
    Assignee: Siemens Energy & Automation, Inc.
    Inventors: Mario Bilac, Charles Randall Dollar, II
  • Patent number: 6243244
    Abstract: A system and method which detects and responds to abnormalities in a distribution system by reconfiguring nodes of the system to minimize the effects of the abnormality without the requirement of communicating with a central controller. The nodes in the system coordinate a response to a system abnormality through a process of self-organization in which each node acts based on its own programming, sensors, and stored data. Each node keeps other nodes apprised of its actions so that they may in turn decide what actions are appropriate for them to take.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: June 5, 2001
    Assignee: EnergyLine Systems, Inc.
    Inventors: William Christian Tracy Nelson, Daniel Partridge, Donald S. Berkowitz, Witold Bik, Ed Brasher, Barry Tangney
  • Patent number: 6212049
    Abstract: A load center monitor (10) is disclosed for monitoring and analyzing data gathered by electronic circuit breakers (40) in a power distribution system and communicated to the load center monitor (10) via a network (26) coupling the load center monitor (10) and the circuit breakers (40) together. The load center monitor (10) includes a first communication port (24) for communicating with the circuit breakers (40), a second communication port (20 or 22) for communicating with an external device and third communication port (28) for providing diagnostic information. The load center monitor (10) further includes audible (30) and visible (34) annunciators for providing alarm or status indications. A processor (76), coupled to the communication ports and to a memory (70) having a real-time clock for time stamping data provides monitoring, control, analysis and data generating capability in the load center monitor (10).
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: April 3, 2001
    Inventors: George Auther Spencer, LeRoy Blanton, Henry Clunn
  • Patent number: 6195243
    Abstract: A system including a load center monitor (10) connected to a plurality of digitally enhanced circuit breakers (40) by a communication bus (26) forms a network of reconfigurable circuit breakers which provides advanced monitoring and control of an electrical power distribution system. A user port (20) and a service port (22) provide a communication interface with an external computer. Visual indicators (34) and an audible alarm (30) provide for alerting persons to certain conditions in the system. Buttons are provided for CLEAR (38), RESET (36), and TEST functions, and a diagnostic port (24) is also provided. The load center monitor (10) is operable to monitor the operation of the circuit breakers (40) and download information therefrom for storage in the load center monitor (10) as in the form of historical data.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: February 27, 2001
    Inventors: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn
  • Patent number: 6160690
    Abstract: A distribution control system that can isolate a fault section without fail, even if control of load break switches becomes impossible because of a communication error between a control center and a feeder terminal unit. If a communication error takes place between the control center and a particular feeder terminal unit, for example, feeder terminal units associated with the particular feeder terminal unit change the operation mode of their controlling load break switches from non-voltage unopened mode to non-voltage open mode.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: December 12, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tadashi Matsumoto, Mitsuru Mitani
  • Patent number: 6157527
    Abstract: A method of communicating data with a plurality of electronic circuit breakers operatively connected in a power distribution system is disclosed and claimed herein. Each circuit breaker includes a communication port coupled to a network. The method comprises coupling a communication terminal, having a processing circuit and a first communication port coupled to the processing circuit, to the network via the first communication port; operating a first communication protocol for automatically addressing individual ones of the circuit breakers and for controlling message traffic on the network; and transmitting and receiving data on the network under control of the first communication protocol relating to the monitoring and control of the individually addressable ones of the plurality of electronic circuit breakers coupled to the network.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: December 5, 2000
    Assignee: George Auther Spencer
    Inventors: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn
  • Patent number: 6144305
    Abstract: An electronic apparatus is provided that can eliminate unlawful cartridges while preventing a malfunction by checking whether there is a short-circuit of pin terminals at the time of turning on the power source and conducting further improved security checks. The electronic apparatus has an electronic apparatus body 2 and a cartridge 5 to be detachably mounted to the electronic apparatus body 2. The cartridge 5 is equipped with a connector having a plurality of terminals and is connected to the electronic apparatus body 2 via the connector. The electronic apparatus body 2 outputs a first and a second short-circuit detecting signal for conducting a short-circuit detection of a circuit portion connected via the plurality of terminals.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: November 7, 2000
    Assignee: Kabushiki Kaisha Bandai
    Inventors: Noriyasu Kakuda, Kousei Kazeto, Satoshi Oshita
  • Patent number: 6111735
    Abstract: A system and method which detects and responds to abnormalities in a distribution system by reconfiguring nodes of the system to minimize the effects of the abnormality without the requirement of communicating with a central controller. The nodes in the system coordinate a response to a system abnormality through a process of self-organization in which each node acts based on its own programming, sensors, and stored data. Each node keeps other nodes apprised of its actions so that they may in turn decide what actions are appropriate for them to take.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: August 29, 2000
    Assignee: EnergyLine Systems, L.P.
    Inventors: William Christian Tracy Nelson, Daniel Partridge, Donald S. Berkowitz, Witold Bik, Ed Brasher, Barry Tangney
  • Patent number: 6008971
    Abstract: A fault protection arrangement for electric power distribution systems includes a plurality of power sources connected to a distribution bus through circuit breakers and a plurality of loads connected through switches to the distribution bus, along with fault sensors in each of the power source lines and load lines and a control means responsive to detection of a fault in a load line to open the circuit breakers in the power source lines connected to the distribution bus and then to open the switch in the load line containing the fault and then to reclose the circuit breakers in the power source line to resume power flow to unaffected loads. The embodiments provide automatic fault isolation and automatic system realignments using a minimum amount of circuit interrupting devices in conjunction with a distributed control system. The embodiments eliminate fault coordination difficulties and improve power continuity as compared to conventional hierarchal protective schemes.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: December 28, 1999
    Assignee: Electric Boat Corporation
    Inventors: Greg Duba, Edgar S. Thaxton, John Walter
  • Patent number: 6005757
    Abstract: A first trip unit for interconnection with a second trip unit includes current transformers and potential transformers for sensing current, voltage and frequency conditions of a circuit breaker's separable contacts. A microprocessor-based trip mechanism provides a trip signal, which is employed by the circuit breaker's operating mechanism to open the separable contacts as a function of the sensed electrical conditions and related predetermined operating values. The microcomputer's transceiver communicates with the second trip unit over a passive two-wire communication cable to acquire the predetermined settings of the second trip unit. The microcomputer includes a firmware routine which employs the acquired predetermined settings as its predetermined values.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: December 21, 1999
    Assignee: Eaton Corporation
    Inventors: Randal P. Shvach, Joseph J. Matsko
  • Patent number: 6005758
    Abstract: A communication terminal (10) is coupled to and operable in a power line network with at least one of plurality of intelligent circuit breakers (40) wherein each such circuit breaker (40) has a communication port. The terminal (10) includes a housing and connection means (12, 14) for connecting the terminal (10) to the power line network. The terminal (10) includes a processing circuit (76) and communication ports (24, 22, 20) for communicating over communication links with the circuit breakers (40) or other external devices according to a message protocol defined for the system.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: December 21, 1999
    Assignee: Zlan, Ltd.
    Inventors: George Auther Spencer, LeRoy Blanton, Robert Henry Clunn
  • Patent number: 5999389
    Abstract: A repeater for a communication network having an isolation circuit for disabling the transmission of a fault-indicative signal through the repeater onto the network. A retriggerable one-shot starts timing with high to low signal transition. In the absence of a second transition within a defined time period, the one-shot triggers a flip-flop which, depending on the logic level of the input signal, generates an enabling signal passed to a logic gate to selectively allow and cut off the transmission of the signal to the repeater circuit input.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: December 7, 1999
    Assignee: Eaton Corporation
    Inventors: Charles J. Luebke, Walter L. Rutchik
  • Patent number: 5940263
    Abstract: A device is disclosed for connecting a plurality of capacitors between a first and a second terminal. The device includes a plurality of bus bars located in a parallel spaced apart relationship. A plurality of fasteners fasten the plurality of capacitors between adjacent bus bars. A plurality of shims are interposed between selected bus bars and the first and second terminal for electrically connecting the plurality of capacitors between the first and second terminals.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: August 17, 1999
    Inventor: Albert Jakoubovitch
  • Patent number: 5905616
    Abstract: A circuit breaker interconnect arrangement and a method for selective interruption of electrical circuits includes at least one upstream circuit breaker having an upstream electronic trip unit and a microprocessor and a plurality of downstream circuit breakers connected to the upstream circuit breaker. The microprocessor transmits a trip command signal to the downstream electronic trip units at the occurrence of a predetermined load condition, such as an overload condition, through the upstream circuit. One or more downstream circuit breakers are tripped after the predetermined time delay for tripping according to a predetermined priority until the load condition through the upstream circuit is reduced below the predetermined load condition whereby the upstream circuit breaker is deterred from interrupting current in the upstream circuit.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: May 18, 1999
    Assignee: Square D Company
    Inventor: Andrew J. Lyke
  • Patent number: 5786699
    Abstract: A relay test apparatus for testing a protective relay operation of a protective relay system comprises GPS receivers, respectively connected to the protective relays, each GPS receiver analyzing time data included in a signal transmitted from a satellite and outputting a time signal, simulation signal generators, respectively connected to the protective relays, each simulation signal generator generating a simulation signal and inputting the simulation signal to a corresponding protective relay, and synchronous starting units, respectively provided in the protective relays, each synchronous starting unit starting a corresponding simulation signal generator to generate the simulation signal, when time signals output from the GPS receivers coincide with a preset time at a same time.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: July 28, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yukio Sukegawa, Tetsuo Matsushima
  • Patent number: 5777264
    Abstract: The present invention relates to a grounding structure for an extractable harddisk, including a first conductor bent from an open end of a rack frame of a harddisk box, and a lock head hole and an LED hole made on the conductor; a second conductor and third conductor mounted on the rear side of the first conductor, and the second conductor is vertical to the third conductor; the second conductor is raised on a long frame, and an expansion side is formed between the long frame and the third conductor; the rack frame is set in the retaining rails of a panel by means of the first conductor, and the lock head and an LED is mounted through the lock head hole and LED hole on the first conductor respectively, and the third conductor is screwed with the outer frame of a host unit so as to discharge static from the lock head and LED out of the host unit.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: July 7, 1998
    Inventor: Chih-Kung Chen