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| Number | Title | Issue Date |
| 8179273 | 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 f... | 05/15/2012 |
| 8159362 | Method of detecting faults using graduated fault detection levels A faulted circuit indicator utilizes digitized fault indication curves to determine if a fault has occurred in a monitored conductor. Fault indication curves are intended to be similar to trip curves of common power protection devices, and consist of a plurality of ... | 04/17/2012 |
| 8159360 | Faulted circuit indicator with fault characteristic detection and 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 ... | 04/17/2012 |
| 8155326 | 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 f... | 04/10/2012 |
| 8154836 | Line current differential protection upon loss of an external time reference A line current differential protection system that uses an external time reference continues providing protection to a power apparatus upon the loss of the external time reference. An external time reference synchronization mode and a channel based synchronization m... | 04/10/2012 |
| 8140283 | Independent frequency measurement and tracking Independent frequency measurement and tracking of a signal using a measurement interval where the frequency of the signal is measured and a sampling rate is calculated, and a settling interval where the frequency of the signal is not measured. The sampling rate is c... | 03/20/2012 |
| 8112235 | 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 ... | 02/07/2012 |
| 8111492 | 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 c... | 02/07/2012 |
| 8108165 | 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... | 01/31/2012 |
| 8059006 | System and method for communicating power system information through a radio frequency device A system for communicating information between a detection device and a wireless device is provided. The system generally includes a detection device adapted to monitor a condition related to a power system. A radio interface unit is in communication with the detect... | 11/15/2011 |
| 8031447 | 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... | 10/04/2011 |
| 8024639 | Software and methods to detect and correct data structure Methods to detect and correct bit errors in data include the steps of specifying to a compiler a storage area with a variable wherein the variable includes a data value corresponding to its data size and an error checking code, calculating an error checking code val... | 09/20/2011 |
| 7979977 | Systems and methods for forming an isolated transformer A transformer to isolate a primary winding from a signal winding include a primary substrate (which may comprise a printed circuit board (PCB)) and a secondary substrate. The primary and secondary substrates may each have three openings to allow first and second E-E... | 07/19/2011 |
| 7945400 | Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system The system and methods monitor odd harmonics within a power distribution system quantity using a special digital filter. A normal level of odd harmonics for the monitored quantity is established. Over predetermined time periods, the odd harmonics within the power di... | 05/17/2011 |
| 7940054 | System and method to zero-sequence verify ground return path integrity by comparing measured zero-sequence current in an autotransformer with a second zero-sequence current source A ground return path is determined to be impaired when no zero-sequence current is measured in the neutral return path, but zero-sequence current is detected in other suitable measuring points that include the windings of an autotransformer, or in a magnetically cou... | 05/10/2011 |
| 7930117 | 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 mea... | 04/19/2011 |
| D634226 | Power line sensor housing | 03/15/2011 |
| D634225 | Power line sensor attachment mechanism | 03/15/2011 |
| D634224 | Power line sensor body portion | 03/15/2011 |
| D634223 | Power line sensor interlocking mechanism | 03/15/2011 |
| D634222 | Power line sensor | 03/15/2011 |
| 7903381 | 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 dispose... | 03/08/2011 |
| 7899619 | Apparatus and method for transmitting information using an IRIG-B waveform generated by an intelligent electronic device An intelligent electronic device broadcasts its own location information over an IRIG-B or similar network, avoiding the need for maintenance personnel to manually record the location of the installed device, and avoiding errors in tracking its location. The intelli... | 03/01/2011 |
| 7889041 | Systems and methods for forming an isolated transformer A transformer to isolate a primary winding from a signal winding include a primary substrate (which may comprise a printed circuit board (PCB)) and a secondary substrate. The primary and secondary substrates may each have three openings to allow first and second E-E... | 02/15/2011 |
| 7877624 | Faulted circuit indicator monitoring device with wireless memory monitor A wireless communications system for viewing and modifying memory locations within a power system device is provided including a wireless device and a power system device. The wireless device includes an input mechanism adapted to accept input from a user indicating... | 01/25/2011 |
| 7868776 | Apparatus and system for adjusting settings of a power system device using a magnetically coupled actuator A system is provided for adjusting settings of a power system device. In one embodiment, the setting adjusted is an identification setting of the power system device. The system generally includes an actuator having a select arrangement of magnets. A magnetic field ... | 01/11/2011 |
| 7856327 | 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 ... | 12/21/2010 |
| 7843897 | System, apparatus and method for mixed mode communication on a single network Provided is a system, apparatus, and method for evaluating a variety of protocols on a computer network which includes a plurality of network devices. The network devices are adapted to communicate messages on the computer network using their respective protocols. T... | 11/30/2010 |
| 7788731 | Method and apparatus for customization Provided is an apparatus and method for customization of a protective device. The apparatus and method includes coupling programmer programmable memory to a microprocessor for processing select logic schemes. The programmer programmable memory is adapted to be modif... | 08/31/2010 |
| 7759913 | Apparatus and methods for controlling operation of a single-phase voltage regulator in a three-phase power system Provided are methods for controlling operation of a voltage regulator of a single-phase of a three-phase power system to regulate a measured voltage. One of the methods includes recording a first elapsed time between detecting a first excursion of the measured volta... | 07/20/2010 |
| 7755872 | System, method and device to preserve protection communication active during a bypass operation Provided is an intelligent electronic device for protection, monitoring, controlling, metering or automation of electrical power system. The system, method and device of the present invention preserves current differential protection active during a breaker bypass o... | 07/13/2010 |
| D619480 | Point sensor | 07/13/2010 |
| 7746241 | Magnetic probe apparatus and method for providing a wireless connection to a detection device A system for communicating information from a detection device is provided through a waterproof and wireless interface. The system generally includes a communication member having an inductor and coupled to the detection device. An interface including another induct... | 06/29/2010 |
| D618616 | Connector | 06/29/2010 |
| 7721321 | Method and apparatus for reducing communication system downtime when configuring a cryptographic system of the communication system Disclosed is a method and apparatus for reducing communication system downtime when enabling cryptographic operation of a cryptographic system of the communication system where the cryptographic system includes a first cryptographic device operatively coupled to a p... | 05/18/2010 |
| 7720619 | Systems and methods for detecting high-impedance faults in a multi-grounded power distribution system The apparatus and methods calculate a plurality of sum of differences for a power distribution system quantity with a sum of difference filter, provide a set of predetermined blocking conditions, provide a trending and memory with an output, generate a set threshold... | 05/18/2010 |
| 7719436 | 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 ... | 05/18/2010 |
| 7710693 | Apparatus and method for providing protection for a synchronous electrical generator in a power system An apparatus and method provide protection for a synchronous generator in a power system. The method includes deriving a plurality of generator safe operating boundary data expressions from power system data and/or user-defined inputs. The power system data may incl... | 05/04/2010 |
| 7701683 | Apparatus, system, and method for sharing output contacts across multiple relays A power system device-to-device direct communication system comprises a first intelligent electronic device with a processor and a transmit module. Software within the processor maintains a list of “virtual outputs,” which correspond to a number of data channels... | 04/20/2010 |
| 7698582 | Apparatus and method for compensating digital input delays in an intelligent electronic device An apparatus and method for compensating digital input delay in an intelligent electronic device is provided. A method is provided which provides for accurate SER data recording while facilitating the reduction of processing burden on the IED and optimization of sys... | 04/13/2010 |
