Systems and methods for making real-time predictions about an arc flash event on an electrical system are disclosed. A virtual system model database is operable for providing a virtual system model for the electrical system and continuously update the virtual system model with real-time data from the electrical system. An analytics server comprises an arch flash simulation engine. The arch flash simulation engine is operable to modify the virtual system model to introduce a short-circuit feature to an uninterrupted power supply bypass circuit branch; choose a standard to supply equations used for arc flash event simulation and energy calculation; simulate an arc flash event utilizing the modified virtual system model; calculate a quantity of arc energy released by the arc flash event using results from the simulation; and communicate a report that forecasts an aspect of the arc flash event.

A fault-arc identification unit for an electric circuit, includes at least one voltage sensor, for the periodic determination of electric voltage values; and at least one current sensor, for the periodic determination of electric current variables of the circuit. Both sensors are connected to an evaluation unit, designed such that: electric voltage values are fed to a first fault-arc identification function which carries out a first fault-arc identification based upon a signal profile of the voltage, and emits a first fault-arc identification signal upon a first threshold value being exceeded; electric voltage values and current variables are fed to a second fault-arc identification function which carries out a second fault-arc identification based upon the voltage values and current variables, and emits a second fault-arc identification signal upon a second threshold value being exceeded. The fault-arc identification signals are fed to an inclusive disjunction function, to emit a fault-arc identification signal.

A module for detecting an electrical fault includes a housing; a first conductor and a second conductor; a first measurement toroid, positioned around the first conductor and around the second conductor, for measuring a differential current flowing between the first and second conductors; a second measurement toroid, positioned around the first conductor, for detecting an electric arc signal flowing through this conductor; a relay; an electronic processing circuit configured to switch the relay according to the current measured by the measurement toroids. The measurement toroids are aligned with one another and the first toroid takes the shape of an elongated tube and allows the differential protection to operate with its own current.

A method for analyzing power quality events in an electrical system includes processing electrical measurement data from or derived from energy-related signals captured by at least one metering device in the electrical system to generate at least one dynamic tolerance curve. Each dynamic tolerance curve of the at least one dynamic tolerance curve characterizes a response characteristic of the electrical system at a respective metering point in the electrical system. The method also includes analyzing the at least one dynamic tolerance curve to identify special cases which require further evaluation(s)/clarification to be discernable and/or actionable. The at least one dynamic tolerance curve may be regenerated or updated, and/or new or additional dynamic tolerance curves may be generated, to provide the further clarification. One or more actions affecting at least one component in the electrical system may be performed in response to an analysis of the curve(s).

A method for detecting a tripping of a disconnection unit in an electrical enclosure, the electrical enclosure including at least one disconnection unit for disconnecting electric current and at least one switching unit for switching the electric current, the method including a learning phase configured to generate decision-making categories associated with an acoustic signature of the tripping of the at least one disconnection unit, and a phase of detecting the tripping of the disconnection unit, including: acquiring a unit noise signal generated by at least one of the disconnection units for disconnecting the electric current or at least one switching unit for switching the electric current, and comparing the unit noise signal with the decision-making categories in order to detect whether the unit noise signal corresponds to the tripping of the disconnection unit.

Techniques, systems and articles are described for monitoring electrical equipment of a power grid and predicting likelihood failure events of such electrical equipment. In one example, a system includes an article of electrical equipment, at least one processor, and a storage device. The article of electrical equipment includes one or more sensors that are configured to generate sensor data indicative of one or more conditions of the article of electrical equipment. The storage device includes instructions that, when executed by the at least one processor, cause the at least one processor to: receive the sensor data; determine, based at least in part on the sensor data, a health of the article of electrical equipment; and responsive to determining the health of the article of electrical equipment, perform an operation.

A direct-current electric arc detection method and apparatus, a device, a system, and a storage medium. The method includes: obtaining an electrical quantity of a direct current circuit; inputting the electrical quantity into a burning arc neural network model to perform burning arc detection on the direct current circuit, to obtain a burning arc detection result; and if the burning arc detection result is that a burning arc is detected, determining that a direct-current electric arc fault exists in the direct current circuit. Because the electrical quantity is input into the burning arc neural network model to perform burning arc detection on the direct current circuit, a direct-current electric arc fault is detected, and accuracy of detecting a direct-current electric arc fault is further improved.

An example embodiment is a voice appliance including: a plurality of user interface devices comprising at least a microphone and a speaker; a plug for receiving power to the appliance or load; and a communication subsystem configured for wired communication with an electrical receptacle through the plug when plugged into the electrical receptacle. An electrical receptacle for connection to power lines comprises: at least one plug outlet configured to provide DC output, wherein the at least one plug outlet is configured to provide access to a wired communication network defined by at least one of the power lines. The plug outlet can be a Universal Serial Bus (USB) plug outlet to connect to a mobile device or a removable USB memory device. An intelligent junction box at the circuit breaker panel is configured to perform dynamic power allocation and power line communication.

Apparatus and method for controlling a pyro-fuse. A pyro-fuse control system includes a current sensing circuit and a diagnostic circuit. The current sensing circuit is configured to determine whether the current flowing in conductor exceeds a threshold current. The diagnostic circuit is coupled to the current sensing circuit. The diagnostic circuit is configured to determine whether an indication of current exceeding the threshold current generated by the current sensing circuit is caused by current flowing the conductor and is not caused by a fault in the current sensing circuit.

In some examples, after a jack of a power supply is connected to a port of a device, a first safety chip may provide a signal that includes an amount of power sufficient to power a second safety chip located in the power supply. After receiving a message from the second safety chip, the first safety chip may send the second chip an instruction to cause relays in the power supply to transition from open to closed, causing power to be provided by the jack to the computing device. The first safety chip may repeatedly send a continue instruction requesting the second chip to keep the relays in the closed position. If the jack is disconnected from the port, the second safety chip fails to receive the continue instruction and causes the relays to transition back to the open position, stopping power from being provided by the power jack.