Abstract: Embodiments of the disclosure provide a thermal model based on an adaptive filter bank for characterizing heat transfer of a volume of a thermal system. In one embodiment, the adaptive filter bank is used for diagnostics that provides information related to the condition of a thermal system. The diagnostics are based on an analysis of heat transfer characteristics of a dynamic representation of the thermal system. In accordance with the embodiments, thermal coefficients are generated based on an adaptive filter bank. One or more filters are applied to the thermal coefficients based on a sampling rate and one or more estimate thermal coefficient thresholds are generated based on the sampling rate. It is determined whether at least one of the thermal coefficients that is filtered satisfies at least one of the estimated thermal coefficient thresholds. Thereupon, alert information indicative of a diagnostic event is provided based on the determination.

Abstract: A method, apparatus and computer program product resolve the problem of unbalanced loads in an EVSE cluster of multiple EVSE charging stations. A signal is provided to the EVSEs identifying which phase of the three-phase power source has the highest current. When one of the EVSEs in the cluster determines whether it is connected to an EV's on board charging device, determines whether it is already charging the connected EV, and determines whether the EVSE is using the phase that has the highest current, then the EVSE may transmit a cluster load balancing control signal as a control pilot signal to the EV's onboard charging device to adjust the charging rate of the current that the EV is consuming from the EVSE.

Abstract: Systems and methods for managing voltage event alarms in an electrical system are provided. In one aspect of this disclosure, a method for managing voltage event alarms in an electrical system includes processing electrical measurement data from, or derived from, energy-related signals captured by at least one intelligent electronic device (IED) to identify an anomalous voltage condition at a point of installation in the electrical system. The anomalous voltage condition may correspond, for example, to a measured IED voltage being above or greater than one or more upper alarm thresholds or below or less than one or more lower alarm thresholds. The method also includes determining if the electrical system is affected by the identified anomalous voltage condition.

Abstract: A system includes an item of electrical equipment, a power meter configured to monitor a parameter of power delivered to and/or supplied by the item of electrical equipment, a processor configured to receive an indication of the monitored parameter and determine a rating from at least the indication of the monitored parameter, and a graphical user interface (GUI) configured to display the rating in a visualization including an object divided into a plurality of graphical category sub-sections. Each of the plurality of graphical categories represents a range of ratings, At least one of the plurality of graphical categories represents a greater range of ratings than at least one other of the plurality of graphical categories.

Abstract: System and method for syncing and merging network changes to a distribution network are disclosed. In some embodiments, network changes made to a network outside of a Geographic Information System (GIS) can be synced to the GIS so that the GIS remains an enterprise's primary repository for network information. In some embodiments, the disclosed system enables comparing and merging of network states using a command-based technique that significantly reduces the number of possible merge conflicts.

Abstract: According to one aspect, a system configured to provide equivalent measurement values is provided. The measurement equivalency component is configured to receive, from a component, data requesting at least one measurement value meeting at least one criterion, the at least one measurement value having at least one first measurement type, determine that the at least one measurement value is not stored within at least one memory, determine that at least one stored measurement value meeting the at least one criterion and having at least one second measurement type different from the at least one first measurement type is stored within the at least one memory, and provide data descriptive of at least one equivalent measurement value based on the at least one stored measurement value to the component in response to receipt of the data requesting the at least one measurement value.

Abstract: Techniques for monitoring the health of a three-phase induction motor are provided. An expected threshold value is calculated as a function of an expected ratio of current unbalance to voltage unbalance for the three-phase motor. Embodiments determine whether a measured current unbalance exceeds the expected threshold value. Responsive to the measured current unbalance exceeding the expected threshold value, a remedial action may be taken, such as generating diagnostic information or activating one or more protection operations for the three-phase induction motor.

Abstract: A system for measuring electrical network parameters may include a voltage sensing node of an electrical network with a first clock and a current sensing node of the electrical network with a second clock. At least one of the voltage sensing node and the current sensing node synchronizes the first clock with the second clock. The voltage sensing node samples a voltage signal from a voltage transducer and the current sensing node samples a plurality of current signals from respective current transducers. The voltage sensing node resamples the sampled voltage signal to determine corresponding resampled voltage signals, and the current sensing node resamples each of the sampled current signals to determine corresponding resampled current signals. The voltage sensing node communicates (1) corresponding re-sampled voltage signals and (2) a voltage time stamp based on the synchronized first clock associated with the sampled voltage signal to the current sensing node through a communication link.

Abstract: Embodiments of the disclosure provide for a fast device installation and replacement (DI&R) service in a network while simultaneously providing confidentiality and integrity protection for sensitive device data. In one embodiment, this protection is provided by using certain characterization data associated with each device in a network to generate a passphrase. This passphrase can be related to the topology of the devices. In one embodiment, the passphrase is a concatenation of certain device characterization data with respect to the topology. In embodiments, the concatenation includes arranging the characterization data based on an order of each device with respect to the topology. Cryptographic keys are derived based on the passphrase. The cryptographic keys are used to automatically encrypt and decrypt the sensitive device data without user intervention.

Abstract: An indicator tab comprising a thermochromic material is mounted in thermal contact with an electrical component in an enclosure. An observation port in a cover of the enclosure is juxtaposed with the indicator tab enabling visual observation of the thermochromic material indicating a temperature of the component. Each indicator tab comprises a visible portion on one end of an arm where the thermochromic material is located and a fastening portion on the other end thermally contacting the component. The indicator tab is composed of a material having a high thermal conductivity to efficiently conduct heat toward the visible portion. In an enclosure where the components are close together, the arm may be composed of a high electrical resistivity material to avoid creating a short circuit with other components. Alternately, in an enclosure where the components are not closely positioned, the arm may be composed of a metallic material.

Abstract: The line power and neutral conductors for a circuit interrupter such as a miniature circuit breaker, using ground fault sensing via a current transformer, are arranged as a rigid conductor formed from a flat plate and surrounding and holding an insulated flexible conductor when passing through the Ground Fault Interrupter current transformer. The rigid conductor can provide a shaped current path to maximize the effectiveness of the current transformer.

Abstract: A circuit interrupt device provides a controller and method thereof that is programmed to receive a plurality of data sequences, each data sequence containing a set of data points corresponding to a waveform of line current flowing through the circuit interrupt device. The controller performs spectral reduction on the plurality of data sequences using a finite series transform to reduce bandwidth requirement and transmits a spectrally reduced version of the plurality of data sequences to an external system using reduced bandwidth. The data can then be processed and converted to meta data for monitoring and tracking purposes.

Abstract: A method for analyzing operation of a motor includes capturing time-domain energy-related signals associated with at least one motor using at least one intelligent electronic device electrically coupled to the at least one motor. The signals are processed to determine an operating state of the at least one motor, and the signals are converted to frequency representations of the signals in response to it being determined the operating state of the at least one motor indicates the at least one motor is at least one of energizing/starting and in a normal operating state/running. At least one of power data and impedance data is determined at one or more frequencies in the frequency-domain from the frequency representations of the time-domain energy-related signals, and an issue associated with the at least one motor is identified based on analysis of at least one of the determined power data and/or the determined impedance data.

Abstract: An HVAC&R monitor detects short-term and long-term system efficiency degradations by modeling either compressor input power or current. The model is continuously updated with new or recent temperature and power parameter measurements reflecting the most up-to-date operating condition of the system. Short-term system degradations are detected instantaneously by comparing compressor power or current as predicted by the model against measured power or current usage. Long-term system degradations are detected over time by monitoring the sensitivity of the compressor power or current usage to evaporator and/or condenser fluid temperatures. An appropriate warning and/or signal may be issued if system efficiency degradation is detected.

Abstract: The overload relay units within a motor control group have the timing function for their motor thermal memories under the control of a central controller in communication with the overload relays. Thus expensive timing components and control of timestamps can be removed from individual overload relays. Further reduction of individual overload relay components can be accomplished by removing the nonvolatile memory function from the individual overload relays and allowing the central controller to perform the nonvolatile memory functions for the overload relays. The motor thermal model function for the overload relays can remain in the overload relays or might be moved to the central controller if communication bandwidth permits.

Abstract: A method and system for analyzing waveform capture data is provided. In one aspect, the method comprises receiving, by a controller from an intelligent electronic device, waveform capture data indicative of an electrical event, extracting, from the waveform capture data, electrical event data, extracting, from memory associated with the controller, additional data, classifying the waveform capture data into a category of a plurality of categories using the electrical event data, comparing the electrical event data and the additional data to stored data, diagnosing the electrical event and a cause of the electrical event based on the comparison and providing an indication of the cause of the electrical event.

Abstract: A method for monitoring a power system includes receiving, from at least one component monitor in communication with components of the power system, a first set of readings for at least one of the power system components at an input of a central processing unit. The method also includes providing the first set of readings to be displayed in a graphical format on a user interface. A user selection of a portion of the first set of readings, and at least one user classification of the portion of the first set of readings, is received. Portions of the first set of readings are identified and removed based on the at least one user classification to generate a modified set of readings. The modified set of readings is classified by at least one characteristic, and the at least one characteristic is detected in a second set of readings.

Abstract: A method for managing voltage event alarms in an electrical system includes processing electrical measurement data from energy-related signals captured by at least one intelligent electronic device (IED) of a plurality of IEDs to identify an anomalous voltage condition at a point of installation of a respective one of the plurality of IEDs in the electrical system. In embodiments, the anomalous voltage condition corresponds to a measured IED voltage being above one or more upper alarm thresholds or below one or more lower alarm thresholds. The method also includes determining if the electrical system is affected by the identified anomalous voltage condition. In response to determining that the electrical system is not affected by the identified anomalous voltage condition, at least one of the one or more upper alarm thresholds or at least one of the one or more lower alarm thresholds may be adjusted to the measured IED voltage.

Abstract: Example embodiments of the invention perform updating of arc-fault detection protection software in a dual function/combination arc-fault circuit interrupter (DF/CAFI) device, without requiring any hardware changes to the device. Maintenance software running in a processor in the device synchronizes downloading the updated protection software as packets of modulated data from a host device, downloaded over an electric power line connected to the device. The modulated data on the power line is sensed by a current sensor of the device and is filtered, demodulated, and sampled by the device. The maintenance software then assembles packets of the demodulated and sampled data and loads them into memory in the device as the updated arc-fault detection protection software.

Abstract: A remote controllable monitoring system includes a movable sensor to monitor characteristic(s) of electrical components of equipment housed at different locations inside of an electrical enclosure. The movable sensor is movably mounted inside of the electrical enclosure. The monitoring system can also control the power supplied to the electrical components (e.g., turn power ON or OFF). A remote device interacts with the monitoring system to provide a user with remote control over the functions of the monitoring system. The remote device can include an interactive user interface with a virtual map of the electrical components. Accordingly, the user can monitor electrical components and turn OFF power to the electrical components if a problem or perspective problem is detected, via the interactive user interface of the remote device without opening or being near the electrical enclosure.