There is provided an electrical assembly comprising of a latching device including a latching member configured to be positionable in a first position and a second position, the latching device further including an actuator configured to selectively move the latching member between the first and second positions and an operating state detection unit configured to detect an abnormal operating state of the latching device; and a controller configured to selectively drive the actuator to move the latching member to a selected one of the first and second positions in response to the detection of the abnormal operating state.

A system provides a “virtual room” for remotely sharing content experiences via electronic devices at different locations. The system may enable synchronization of the content at the different locations, access control, be able to provide and/or experience interaction feedback regarding the content, control the interaction feedback that is provided and/or experienced, enhance the ability of people to distinguish the content from the interaction feedback, and so on. As such, people may be able to share content experiences more like they were present in a single location while remote from each other.

Configurable binary circuits for use in electrical power systems may include an input/output port, a binary input subsystem for receiving a binary input signal, a binary output subsystem for transmitting a binary output signal, and a switch subsystem for selecting one of the binary input subsystem or the binary output subsystem for operation. Intelligent electronic devices (IEDs) and associated methods may include one or more configurable binary circuits.

The disclosure relates to a circuit breaker with a monitoring device having an electronic switch and a mechanical changeover switch, where the mechanical changeover switch has a first terminal, a second terminal and a third terminal, where in a neutral position of the mechanical changeover switch the first terminal is connected to the third terminal and where in an operating position of the mechanical changeover switch the second terminal is connected to the third terminal, where the electronic switch is connected to the third terminal of the mechanical changeover switch as a series circuit, where when switching on the circuit breaker in a first switching state, initially the electronic switch is activated, where a measurement is taken at the first terminal using the monitoring device to determine whether essentially the same potential is present at the first terminal as at the third terminal and, it this is the case, the electronic switch is activated and the mechanical changeover switch is in an operating position in a subsequent additional switching state. Furthermore, the disclosure relates to methods for the circuit breaker.

A method may include receiving a command to move one or more armatures of a switching device from a first position that electrically couples a first contact to a second contact to a second position that electrically uncouples the first contact from the second contact. The method may also include selecting a current zero-crossing point along an electric waveform indicative of a change in current through the first contact and the second contact as a synchronization point, determining a predicted current zero-crossing point by adding a period measurement associated with a previously detected current zero-crossing point or a previously detected line-to-line crossing point in the electric waveform to the synchronization point, and transmitting a command to the switching device to move the armatures from the first position to the second position before or at the predicted current zero-crossing point.

A non-transitory, computer-readable medium may include instructions executable by at least one processor in a computing device to cause the processor to perform operations that include transmitting, to a first power source, a command to provide power to a coil of a switching device with a fixed current profile. The operations also include receiving one or more voltage measurements associated with the coil during a period of time, determining whether the voltage measurements associated with the coil indicate that one or more movable contacts of the switching device are at least partially welded to one or more contacts of an electric circuit, and transmitting an additional command to a second power source to disconnect a current to the coil in response to determining that the voltage measurements indicate that the movable contacts of the switching device are at least partially welded to the contacts of the electric circuit.

An electromagnetic relay diagnostic device includes: an operation detection unit including a first light-emitting unit emitting light when a current flows through a wiring line connected to a coil of an electromagnetic relay; an operation detection unit including a second light-emitting unit emitting light when a current stops flowing through the wiring line; an operation detection unit including a third light-emitting unit emitting light when detecting a change in conductive state of a wiring line connected to a contact of the electromagnetic relay; an operation detection unit including a fourth light-emitting unit emitting light when detecting that the change in conductive state of the wiring line has disappeared; an imaging unit capturing a moving image of the operation detection units; and a diagnostic unit calculating a contact-on operation time and a contact-off operation time using the moving image, and diagnosing whether an abnormality has occurred in the electromagnetic relay.

An electromagnetic relay diagnostic device includes: an operation detection unit including a first light-emitting unit emitting light when a current flows through a wiring line connected to a coil of an electromagnetic relay; an operation detection unit including a second light-emitting unit emitting light when a current stops flowing through the wiring line; an operation detection unit including a third light-emitting unit emitting light when detecting a change in conductive state of a wiring line connected to a contact of the electromagnetic relay; an operation detection unit including a fourth light-emitting unit emitting light when detecting that the change in conductive state of the wiring line has disappeared; an imaging unit capturing a moving image of the operation detection units; and a diagnostic unit calculating a contact-on operation time and a contact-off operation time using the moving image, and diagnosing whether an abnormality has occurred in the electromagnetic relay.

The present invention is provided with: a first contact in a first relay connected to a circuit to be grounded; a resistor which is connected between the first contact and the earth, and which suppresses the flow of electric current to the first contact when the first contact is closed; a second contact in a second relay connected in parallel to the resistor; and an interlocking control means which inhibits opening of the first contact in a closed state when the second contact is opened, and which inhibits closing of the first contact in an open state when the second contact is closed.

The present invention is provided with: a first contact in a first relay connected to a circuit to be grounded; a resistor which is connected between the first contact and the earth, and which suppresses the flow of electric current to the first contact when the first contact is closed; a second contact in a second relay connected in parallel to the resistor; and an interlocking control means which inhibits opening of the first contact in a closed state when the second contact is opened, and which inhibits closing of the first contact in an open state when the second contact is closed.