Abstract: A method and system are provided facilitating worker safety in an electrical system. In the method and system, a request is received from a user to perform a lockout/tagout (LOTO) for equipment in the electrical system. An isolation device(s) is identified for electrically isolating the equipment from an electrical energy source(s) in the electrical system. A digital LOTO procedure is performed for the equipment, which includes controlling shutdown of the equipment; controlling an operation of the isolation device(s) to isolate the equipment from the energy source(s); performing digital lockout for the equipment by setting a lockout status for the equipment which prohibits or prevent unauthorized release of the lockout; and providing a digital record of the lockout which reflects a lockout status of the energy source(s) from the equipment, identifies the user responsible for the request, and provides notice of the lockout status for the equipment.

Abstract: A method of resetting a password used for accessing a product device is provided, including receiving a password reset request from a user to reset a password for accessing the product device, the user having a prior registration to access the product device, generating a temporary password that uses information that is unique for each of the product device and the user and is signed using a cryptographic technique, and providing the signed password to the user for submission to and verification by the product device. The product device is configured to verify the signed temporary password using the cryptographic technique and using information that is unique for each of the product device and the user and that is known to the product device, and to allow the user access to the product device pending verification.

Abstract: An electric vehicle (EV) charging system can include a plurality of charging terminals, each charging terminal comprising a charging cable configured to connect to an electric vehicle. The system can include an electrical equipment assembly physically separated from the plurality of charging terminals. The assembly can include a plurality of electric vehicle supply equipment (EVSE) loads, each EVSE load configured to supply power to a respective charging terminal to provide a charge current to an EV connected to the cable of the charging terminal. A main breaker can be connected to the plurality of EVSE loads configured to supply power to the plurality of EVSE loads and to provide fault protection to the plurality of EVSE loads to provide protection to each charging terminal. In certain embodiments, the main breaker is at least partially solid state.

Abstract: A method of resetting a password used for accessing a product device is provided, including receiving a password reset request from a user to reset a password for accessing the product device, the user having a prior registration to access the product device, generating a temporary password that uses information that is unique for each of the product device and the user and is signed using a cryptographic technique, and providing the signed password to the user for submission to and verification by the product device. The product device is configured to verify the signed temporary password using the cryptographic technique and using information that is unique for each of the product device and the user and that is known to the product device, and to allow the user access to the product device pending verification.

Abstract: A computer-implemented method is provided to automatically adjust a device setting of a plurality of networked devices. The method includes performing autonomously at a device of the plurality of networked devices, receiving a request to update a device setting to a new value, comparing a characteristic of the plurality of networked devices to a corresponding characteristic of the device, determining one or more similar devices of the plurality of devices that satisfy a similarity criteria based on a result of the comparison, and accessing the one or more similar devices to change the device setting of the one or more similar devices to the new value.

Abstract: A method is performed by a bus coupler of a subnetwork of one or more local subnetworks coupled to an overall network is provided, including performing a local discovery process for discovering and identifying one or more bus devices included in the subnetwork. The method further includes submitting an internet protocol (IP) address request to obtain an IP address for the bus coupler, receiving at the bus coupler the IP address of the bus coupler in response to the IP address assignment request, submitting a configuration request for configuration information associated with a device name for the bus coupler, receiving the configuration information in response to the configuration request, and configuring at least one feature of the bus coupler using the configuration information, wherein the device name is based on identifier(s) of the respective one or more bus devices obtained by the discovery process.

Abstract: A method is performed by a bus coupler of a subnetwork of one or more local subnetworks coupled to an overall network is provided, including performing a local discovery process for discovering and identifying one or more bus devices included in the subnetwork. The method further includes submitting an internet protocol (IP) address request to obtain an IP address for the bus coupler, receiving at the bus coupler the IP address of the bus coupler in response to the IP address assignment request, submitting a configuration request for configuration information associated with a device name for the bus coupler, receiving the configuration information in response to the configuration request, and configuring at least one feature of the bus coupler using the configuration information, wherein the device name is based on identifier(s) of the respective one or more bus devices obtained by the discovery process.

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: 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: 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 measurement module receives a defined system topology and system component characteristics information for a system. The measurement module calculates an expected system impedance for the defined system topology. The measurement module collects one or more impedance measurements using a high frequency voltage stimulus. Finally, the measurement module compares the one or more impedance measurements with the expected system impedance to determine adequacy of protective grounding of the system.

Abstract: A measurement module uses harmonic compensation factors to minimize the effects of harmonic distortion in measurements of a source current by a current sensor of the module. The module samples at a first sampling rate, measurements of the source current to generate a first current measurement. The module samples at a second sampling rate higher than the first sampling rate, for an interval of time, measurements of the source current to generate a second current measurement. The module determines a harmonic compensation factor based, at least, on a difference between the first current measurement and the second current measurement. The module determines a reported current computed as a function of at least the first current measurement, the difference between the first current measurement and the second current measurement, and the harmonic compensation factor. The reported current represents a magnitude of the source current adjusted by the harmonic compensation factor.

Abstract: A computer-implemented method is provided to automatically adjust a device setting of a plurality of networked devices. The method includes performing autonomously at a device of the plurality of networked devices, receiving a request to update a device setting to a new value, comparing a characteristic of the plurality of networked devices to a corresponding characteristic of the device, determining one or more similar devices of the plurality of devices that satisfy a similarity criteria based on a result of the comparison, and accessing the one or more similar devices to change the device setting of the one or more similar devices to the new value.

Abstract: A measurement module receives a defined system topology and system component characteristics information for a system. The measurement module calculates an expected system impedance for the defined system topology. The measurement module collects one or more impedance measurements using a high frequency voltage stimulus. Finally, the measurement module compares the one or more impedance measurements with the expected system impedance to determine adequacy of protective grounding of the system.

Abstract: A measurement module uses harmonic compensation factors to minimize the effects of harmonic distortion in measurements of a source current by a current sensor of the module. The module samples at a first sampling rate, measurements of the source current to generate a first current measurement. The module samples at a second sampling rate higher than the first sampling rate, for an interval of time, measurements of the source current to generate a second current measurement. The module determines a harmonic compensation factor based, at least, on a difference between the first current measurement and the second current measurement. The module determines a reported current computed as a function of at least the first current measurement, the difference between the first current measurement and the second current measurement, and the harmonic compensation factor. The reported current represents a magnitude of the source current adjusted by the harmonic compensation factor.

Abstract: Techniques for automatically configuring a computing device in a computing environment are provided. One embodiment includes determining that the computing device has been added to a computing environment and that at least one feature of the computing device is unconfigured. Device name data specifying at least two potential device identifiers for the computing device is received from a plurality of endpoint devices communicatively coupled to the computing device. A first device identifier is selected from the at least two potential device identifiers and device configuration data associated with the first device identifier is requested from a device configuration server. The at least one feature of the computing device can then be configured using the device configuration data.

Abstract: A progressive protection method automatically adapts a protection trip delay or fault timeout for a motor that is a member of a group of motors performing mutually similar or related tasks, based on the occurrence of a fault in another motor within the group, without requiring manual intervention. If the user requires stringent protection of the motors in a particular application, then the trip delay time for all of the motors in the group, may be shortened in response to recently-detected similar trips of other motors within the group. Alternatively, if the user prefers continuity of service for a particular application, then the trip delay time for all of the motors in the group, may be increased in response to recently-detected similar trips of other motors within the group, based on past experience with the occurrence of fault self-clearing for the motors in the group.

Abstract: A progressive protection method automatically adapts a protection trip delay or fault timeout for a motor that is a member of a group of motors performing mutually similar or related tasks, based on the occurrence of a fault in another motor within the group, without requiring manual intervention. If the user requires stringent protection of the motors in a particular application, then the trip delay time for all of the motors in the group, may be shortened in response to recently-detected similar trips of other motors within the group. Alternatively, if the user prefers continuity of service for a particular application, then the trip delay time for all of the motors in the group, may be increased in response to recently-detected similar trips of other motors within the group, based on past experience with the occurrence of fault self-clearing for the motors in the group.

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 and method is provided to monitor wear on a power factor correction capacitor in a motor system. The system and method obtains a baseline inductance angle, reactive power or power factor corresponding to a baseline power factor correction by the capacitor in the circuit; monitors a current supplied to the motor at a location upstream of the capacitor; monitors a voltage supplied to the motor, and determines a present inductance angle, reactive power or power factor based on the monitored current and voltage. The present inductance angle, reactive power or power factor corresponds to a present power factor correction by the capacitor. The system and method can then determine when the power factor correction of the capacitor has degraded to an unsatisfactory level based on a change in the inductance angle, reactive power or power factor from the baseline values, and take appropriate action.