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| Application No. | Application Title | Issue Date |
| 20110043045 | SYSTEMS AND METHODS FOR ASYNCHRONOUS SAMPLING DATA CONVERSION Disclosed herein are systems and methods for converting data samples representing alternating electric currents. The data samples may be obtained by sampling a first alternating electric current having a first frequency at a sampling frequency, sampling a second alterna... | 02/24/2011 |
| 20110035076 | ELECTRIC POWER SYSTEM AUTOMATION USING TIME COORDINATED INSTRUCTIONS A system for controlling and automating an electric power delivery system by executing time coordinated instruction sets to achieve a desired result. A communication master may implement the execution of time coordinated instruction sets in a variety of circumstances. T... | 02/10/2011 |
| 20110035066 | ELECTRIC POWER SYSTEM AUTOMATION USING TIME COORDINATED INSTRUCTIONS A system for controlling and automating an electric power delivery system by executing time coordinated instruction sets to achieve a desired result. A communication master may implement the execution of time coordinated instruction sets in a variety of circumstances. T... | 02/10/2011 |
| 20110035065 | ELECTRIC POWER SYSTEM AUTOMATION USING TIME COORDINATED INSTRUCTIONS A system for controlling and automating an electric power delivery system by executing time coordinated instruction sets to achieve a desired result. A communication master may implement the execution of time coordinated instruction sets in a variety of circumstances. T... | 02/10/2011 |
| 20110004425 | STATE AND TOPOLOGY PROCESSOR A State and Topology Processor (STP) may be communicatively coupled to one or more intelligent electronic devices (IEDs) communicatively coupled to a electrical power system to obtain one or more current measurements, voltage measurements, and dynamic topology data ther... | 01/06/2011 |
| 20110001485 | ENERGY MANAGEMENT FOR AN ELECTRONIC DEVICE Energy management of an electronic device using multiple electric power sources. The electric power sources may include a parasitic electric power source, a rechargeable electric power source, an intermittent electric power source, and a continuous electric power source... | 01/06/2011 |
| 20100318238 | Voltage Regulation Using A Remote Metering Device Regulation of a remote load center voltage from a local location of a voltage regulator and a voltage regulator control using voltage measurements from the remote load center obtained using a metering device at the load center in communication with the voltage regulator... | 12/16/2010 |
| 20100286838 | ISLANDING DETECTION IN AN ELECTRICAL POWER DELIVERY SYSTEM An intelligent electronic device is operable to use a signal derived from an electrical power delivery system to effectively detect an islanding condition. The intelligent electronic device is configured to compare a frequency deviation (from nominal frequency) and a ra... | 11/11/2010 |
| 20100265743 | CONTACT-INPUT ARRANGEMENT FOR POWER SYSTEM DEVICES A contact-input circuit for a power system device is described for processing a higher voltage signal from power system equipment or another power system device for use by a lower voltage circuit. The contact-input circuit generally includes a voltage threshold detectio... | 10/21/2010 |
| 20100264749 | DIFFERENTIAL ELEMENT WITH HARMONIC BLOCKING AND HARMONIC RESTRAINT OPERATING IN PARALLEL An intelligent electronic device (IED) provides harmonic blocking and harmonic restraint differential protection operating in parallel. The IED includes a harmonically-blocked differential element supervised by one or more even harmonics of a raw operating current (a cu... | 10/21/2010 |
| 20100260066 | NETWORK DISCOVERY AND DATA TRANSFER USING SNMP IN AN ELECTRIC POWER TRANSMISSION OR DISTRIBUTION SYSTEM Disclosed herein are systems and methods for performing network discovery and file transfer utilizing Simple Network Management Protocol (SNMP). According to one embodiment, a manager queries an agent device to obtain an agent device's neighbor address table comprising ... | 10/14/2010 |
| 20100254225 | FAULT TOLERANT TIME SYNCHRONIZATION Systems and methods for distributing accurate time information to geographically separated communications devices are disclosed. Additionally, the desired systems and methods may adjust local time signals to compensate for measured signal drifts relative to more accurat... | 10/07/2010 |
| 20100238045 | SYSTEM, A TOOL AND A METHOD FOR COMMUNICATING WITH A FAULTED CIRCUIT INDICATOR USING A DISPLAY Provided is a system, a tool and a method for communicating with a faulted circuit indicator (FCI), the faulted circuit indicator including a detection circuit for monitoring an electrical conductor of a power system. The system includes a display and a first light emit... | 09/23/2010 |
| 20100231040 | MOBILE AUXILLIARY POWER SYSTEM FOR ELECTRICAL DISTRIBUTION AND TRANSMISSION SYSTEMS A system, apparatus and method for increasing the reliability of an electric power transmission or distribution system by injecting controlled electric power into the transmission or distribution system using mobile electric power sources. The mobile electric power sour... | 09/16/2010 |
| 20100201230 | ELECTRIC POWER SYSTEM CONTROL SYSTEM WITH SELECTIVE ENCLOSURE An enclosure for electric power system control, monitoring, protection, and automation access devices, which includes a selective workspace enclosure. The enclosure includes a workspace enclosure for enclosing a workspace adjacent to a device for controlling, protecting... | 08/12/2010 |
| 20100195763 | APPARATUS, SYSTEM, AND METHOD FOR CREATING ONE OR MORE SLOW-SPEED COMMUNICATIONS CHANNELS UTILIZING A REAL-TIME COMMUNICATION CHANNEL An intelligent electronic device creates one or more virtual communications channels using unused or dedicated bits from a primary real-time communications channel. The virtual communications channels are used to transport low-speed information, such as executable comma... | 08/05/2010 |
| 20100141463 | PROVIDING PRICE AND SERVICE INFORMATION TO ELECTRIC POWER CUSTOMERS A notification device and method associated therewith for notifying an electric power consumer to reduce electric power consumption when the notification device detects selected power system conditions. The notification device detects conditions on the electric power sy... | 06/10/2010 |
| 20100125373 | MINIMIZING CIRCULATING CURRENT USING TIME-ALIGNED DATA A power system may comprise two or more transformers operating in parallel. A voltage differential may exist between the transformers, which may create a circulating current in the power system. The system voltage of the power system may be modified by performing a tap ... | 05/20/2010 |
| 20100073831 | PROTECTIVE DEVICE WITH METERING AND OSCILLOGRAPHY A device, such as an intelligent electronic device (IED), provides a monitoring and protective function for a power system. The protective function uses stimulus acquired from the power system to detect power system conditions and to take one or more protective actions ... | 03/25/2010 |
| 20100073830 | SECURE ARC FLASH DETECTION An intelligent electronic device (IED) may be configured to detect arc flash events within a power system using stimulus measurements acquired by detection devices communicatively coupled to the power system. An arc flash event may be detected using a time-intensity com... | 03/25/2010 |
| 20100073013 | VALIDATION OF ARC FLASH DETECTION SYSTEMS An arc flash validation unit may generate stimulus to be received by an arc flash detection unit (AFDU) and observe the response of the AFDU thereto. The response of the AFDU to the stimulus may allow for validation of the AFDU (e.g., validation that the AFDU is operati... | 03/25/2010 |
| 20100072355 | ARC FLASH PROTECTION WITH SELF-TEST An method for automatically testing an arc flash detection system by periodically or continually transmitting electro-optical (EO) radiation through one or more transmission cables electro-optically coupled to respective EO radiation collectors. A test EO signal may pas... | 03/25/2010 |
| 20100072352 | ELECTRO-OPTICAL RADIATION COLLECTOR FOR ARC FLASH DETECTION An electro-optical (EO) radiation collector for collecting and/or transmitting EO radiation (which may include EO radiation in the visible wavelengths) for transmission to an EO sensor. The EO radiation collector may be used with an arc flash detection device or other p... | 03/25/2010 |
| 20100060227 | MOTOR PROTECTION USING ACCURATE SLIP CALCULATIONS An accurate slip calculation for providing monitoring and protection to an electric motor. The slip calculation is made using a minimum value of stator resistance as the initial stator resistance, where the minimum value of stator resistance is the minimum value of stat... | 03/11/2010 |
| 20100013632 | Transceiver Interface for Power System Monitoring A system and method for filtering electric power system data communicated from faulted circuit indicators (FCIs) and at least one other source before the electric power system data is further communicated to a monitoring system such as SCADA. The power system data from ... | 01/21/2010 |
| 20100002348 | DISTRIBUTED BUS DIFFERENTIAL PROTECTION USING TIME-STAMPED DATA A distributed busbar protection system using time-stamped data gathered from measurement devices in an electrical power system bus arrangement by respective intelligent electronic devices (IEDs). The IEDs may derive the timestamp information from a clock or other time s... | 01/07/2010 |
| 20090296583 | Systems, Methods, and Apparatus for Recording Network Events Associated with a Power Generation or Delivery System A network recorder adapted for use within power generation, delivery and protection systems and/or process control systems is disclosed. The network recorder itself comprises a network port coupled to a communications network utilized by a monitoring, control, automatio... | 12/03/2009 |
| 20090254655 | Generation and Control of Network Events and Conversion to SCADA Protocol Data Types A system and method is disclosed for receiving a network event in a network format, mapping the network event into a format expected by a central monitoring system, and communicating the mapped network event to the central monitoring system. The system may employ a vari... | 10/08/2009 |
| 20090254291 | Acquiring Phasors Outside the Frequency Tracking Range for Power Protective Relays A system and method for acquiring phasors outside of the frequency tracking range for power protective relays. As the frequency of a power system varies from the rated frequency, phasors calculated from such samples include errors. A frequency tracking range is used to ... | 10/08/2009 |
| 20090251308 | THREE-PHASE FAULTED CIRCUIT INDICATOR A three-phase faulted circuit indicator adjustable to accommodate a variety of three-phase power cables is disclosed. In one embodiment, faulted circuit indicator comprises a flexible holder that encircles the monitored conductor slightly more than one time. The flexibl... | 10/08/2009 |
| 20090231769 | Negative Sequence Differential Element A negative sequence differential element may detect a fault in an electrical power system by computing a differential between negative sequence values derived from a first phase-current measurement and a second phase-current measurement. A transformer may be disposed be... | 09/17/2009 |
| 20090231150 | FAULTED CIRCUIT INDICATOR WITH END-OF-LIFE DISPLAY AND DISCHARGE A faulted circuit indicator (FCI) for providing an indication of a fault on a monitored conductor, determining whether the FCI is near the end of its useful life (or entered into an end-of-life mode) and altering an operation of the FCI if the useful life of the FCI has... | 09/17/2009 |
| 20090219164 | FAULTED CIRCUIT INDICATOR WITH FAULT CHARACTERISTIC DETECTION AND DISPLAY A display for a faulted circuit indicator is disclosed. A plurality of light-emitting diodes are arranged so that at least one diode is visible to a person approaching the faulted circuit indicator from a determined angle of approach. When a fault is detected, the fault... | 09/03/2009 |
| 20090219163 | FAULTED CIRCUIT INDICATOR WITH FAULT CHARACTERISTIC DETECTION & DISPLAY A display for a faulted circuit indicator is disclosed. A plurality of light-emitting diodes is arranged so that at least two diodes are visible to a person approaching the faulted circuit indicator from a determined angle of approach. When a fault is detected, the faul... | 09/03/2009 |
| 20090125158 | STATE AND TOPOLOGY PROCESSOR A State and Topology Processor (STP) may be communicatively coupled to one or more intelligent electronic devices (IEDs) communicatively coupled to a electrical power system to obtain one or more current measurements, voltage measurements, and dynamic topology data ther... | 05/14/2009 |
| 20090099798 | Real-Time Power System Oscillation Detection Using Modal Analysis A power system oscillation detection device is provided for use in an electric power system. A plurality of sample signals are acquired from the electrical power system via a plurality of intelligent electronic devices (IEDs) in communication with the power system. The ... | 04/16/2009 |
| 20090091867 | Transformer Through-Fault Current Monitor A device is provided for monitoring through-fault current in an electric transformer on an electrical power system. The device generally includes a magnitude calculator for calculating the magnitude of current (e.g., a root means square value of current or magnitude of ... | 04/09/2009 |
| 20090091441 | System, Method, and Apparatus for Using the Sound Signature of a Device to Determine its Operability A system for monitoring the operation of one or more devices is provided. The system includes a microphone acoustically coupled to one the monitored device. An analog-to-digital-converter samples the microphone and a processor examines the resultant digital signal for t... | 04/09/2009 |
| 20090091303 | Power Angle Monitor A system and method for monitoring the rotation of a generator rotor and calculating a power angle using an optical rotor displacement monitor. The monitor uses a light beam directed toward the rotor to detect a marking thereon, and generates an electrical pulse when th... | 04/09/2009 |
| 20090089608 | SYSTEMS AND METHODS FOR POWER SWING AND OUT-OF-STEP DETECTION USING TIME STAMPED DATA A first intelligent electric device (IED) may be placed at a first location in an electrical power system and a second IED may be placed at a second location in the electrical power system. Voltage measurements may be received from the first and second IEDs. The measure... | 04/02/2009 |
