A single-phase electric meter having a phase conductor intended to be connected to a phase of an electric line located upstream of the single-phase electric meter and to a phase of an electric installation located downstream of the single-phase electric meter, the single-phase electric meter further including a breaking unit mounted on the phase conductor, an upstream voltage sensor arranged to periodically measure an upstream voltage upstream of the breaking unit, and a processing device arranged to acquire upstream voltage measurements and to open the breaking unit when the upstream voltage drops below a first predetermined threshold voltage.

Apparatus detects an electrical fault in a primary tap having a plurality of distribution transformers each provided in a distribution circuit along a length of the primary tap, on a power distribution system. The apparatus includes a voltage monitor provided at each of the distribution circuits for monitoring a voltage in a corresponding distribution circuit, a controller in communication with each of the voltage monitor for receiving the voltage monitored and transmitted by the voltage monitors, and a fuse isolator configured to electrically connect the primary tap to a high voltage on the power distribution system and electrically disconnect the primary tap from the high voltage on power distribution system when activate. A fuse isolator actuator in communication with the controller is provided for activating the fuse isolator responsive to a control signal from the controller when a fault in the primary tap is detected by the controller, which determines that a fault exists in the primary tap based on the voltages monitored by the plurality of voltage monitors.

The invention mainly relates to a rotating electrical machine (10) comprising: a rotor (12) provided with a rotor winding (13); a stator (11) provided with a winding (14) having a plurality of phases; a converter (16) comprising rectifying components (17) to which the phases of the stator (11) are connected; a voltage regulator (24) for adapting an excitation current (lexc) applied to the rotor winding (13) according to a difference between an output voltage (Liait) and a reference voltage; at least one current sensor (27) arranged at the output of the rotating electrical machine (10) or on at least one phase of the rotating electrical machine (10); and a diagnostic module (30) that can detect a malfunction of the rotating electrical machine (10) on the basis of a current measurement provided by the current sensor (27).

A power supply device according to an embodiment of the disclosure includes a power supply unit including a first power supply unit transmitting standby power to an electronic device and a second power supply unit transmitting main power to the electronic device and a cable including a standby power transmission line transmitting the standby power to the electronic device, a main power transmission line transmitting the main power to the electronic device, a first detect line receiving a power-on signal for operating the second power supply unit from the electronic device, and a second detect line determining whether the power-on signal is received. The second power supply unit does not operate when at least one of the first detect line and the second detect line is opened and the power-on signal is not received. Moreover, various embodiment grasped through the disclosure are possible.

Techniques for determining whether a downed conductor is present in an electrical power distribution network that includes a neutral line and a plurality of energized conductors are disclosed. For example, a sampled neutral current signal is received, the sampled current signal including a plurality of values, each of the values representing an amplitude of current that flows in of the neutral conductor at a particular time; an unfiltered current signal is generated based on the sampled current signal; the sampled current signal is filtered to generate a filtered current signal; the unfiltered current signal and the filtered current signal are compared to generate an error signal; and the error signal is analyzed to determine whether at least one of the plurality of conductors is a downed conductor.

A circuit for ground disconnection protection is provided herein. In an embodiment, the circuit includes power transistor elements in a common-source arrangement coupled between a first ground and a second ground. The power transistor elements are configured to turn on during a ground disconnection event in an electric motor system. This allows a current to pass between the first ground and the second ground, bypassing a control circuit.

A system and method for an LCDI power cord and associated circuits is provided. The system and method include energizing shielded neutral wires and shielded line wires and monitoring the energized shields for surges, e.g., arcing, detected by a Leakage Current Detection Circuit (LCDC) and/or voltage drops, e.g., shield breaks, detected by a Shield Integrity Circuit (SIC).

Systems and methods may mitigate risk of fire caused by an electric power system. In one embodiment, a system may include an intelligent electronic device (IED). The IED includes a communication subsystem to receive a signal from a sensor related to a condition of the electric conductor. A processing subsystem in communication with the communication subsystem may operate in at least two modes comprising a high security mode and a fire prevention mode. In the fire prevention mode, the IED may interrupt a flow of electric current based on the signal from the at least one sensor associated with the electric conductor. In the high security mode, the system may interrupt a flow of electric current based on the signal from the at least one sensor associated with the electric conductor and based on a second condition relating to the electric conductor.

A composite structure of a cargo body and a method of making the same are disclosed. The composite structure includes at least one electrical grid embedded within fiber-reinforced polymer (FRP) layers. The embedded electrical grid includes a plurality of conductive fibers and a plurality of insulating fibers integrated into a polymer matrix of the FRP layers. The embedded electrical grid may be used for power distribution, structural strengthening and stiffness, and/or puncture detection.

Methods and apparatus for an IC package having an impedance detector module configured to have: a first connection to a first external energy source via a first IO pin of the IC package and a second connection to a detection component. In embodiments, the detection component is configured for connection to a first ground for the first external energy source via a second IO pin of the IC package, and to a barrier component, which is configured for connection to a second ground for a second external energy source via a third IO pin of the IC package. The impedance detector module is configured to detect a disconnection or degradation of a connection to ground.